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Index: Makefile.inc1
===================================================================
--- Makefile.inc1
+++ Makefile.inc1
@@ -2715,8 +2715,12 @@
_startup_libs+= lib/libc
_startup_libs+= lib/libc_nonshared
.if ${MK_LIBCPLUSPLUS} != "no"
+.if ${MK_LIBCXXABI} != "no"
+_startup_libs+= lib/libc++abi
+.else
_startup_libs+= lib/libcxxrt
.endif
+.endif
.if ${MK_LLVM_LIBUNWIND} != "no"
_prereq_libs+= lib/libgcc_eh lib/libgcc_s
@@ -2725,6 +2729,7 @@
lib/libgcc_s__L: lib/libc__L
lib/libgcc_s__L: lib/libc_nonshared__L
.if ${MK_LIBCPLUSPLUS} != "no"
+lib/libc++abi__L: lib/libgcc_s__L
lib/libcxxrt__L: lib/libgcc_s__L
.endif
@@ -2736,6 +2741,7 @@
gnu/lib/libgcc__L: lib/libc__L
gnu/lib/libgcc__L: lib/libc_nonshared__L
.if ${MK_LIBCPLUSPLUS} != "no"
+lib/libc++abi__L: gnu/lib/libgcc__L
lib/libcxxrt__L: gnu/lib/libgcc__L
.endif
.endif
@@ -2936,7 +2942,11 @@
${_cddl_lib_libctf:D${_cddl_lib_libctf}__L} lib/libelf__L lib/librtld_db__L lib/libutil__L
.if ${MK_CXX} != "no"
.if ${MK_LIBCPLUSPLUS} != "no"
+.if ${MK_LIBCXXABI} != "no"
+lib/libproc__L: lib/libc++abi__L
+.else
lib/libproc__L: lib/libcxxrt__L
+.endif
.else # This implies MK_GNUCXX != "no"; see lib/libproc
lib/libproc__L: gnu/lib/libsupc++__L
.endif
Index: contrib/libcxxabi/CREDITS.TXT
===================================================================
--- /dev/null
+++ contrib/libcxxabi/CREDITS.TXT
@@ -0,0 +1,71 @@
+This file is a partial list of people who have contributed to the LLVM/libc++abi
+project. If you have contributed a patch or made some other contribution to
+LLVM/libc++abi, please submit a patch to this file to add yourself, and it will be
+done!
+
+The list is sorted by surname and formatted to allow easy grepping and
+beautification by scripts. The fields are: name (N), email (E), web-address
+(W), PGP key ID and fingerprint (P), description (D), and snail-mail address
+(S).
+
+N: Aaron Ballman
+E: aaron@aaronballman.com
+D: Minor patches
+
+N: Logan Chien
+E: logan.chien@mediatek.com
+D: ARM EHABI Unwind & Exception Handling
+
+N: Marshall Clow
+E: mclow.lists@gmail.com
+E: marshall@idio.com
+D: Architect and primary coauthor of libc++abi
+
+N: Matthew Dempsky
+E: matthew@dempsky.org
+D: Minor patches and bug fixes.
+
+N: Nowar Gu
+E: wenhan.gu@gmail.com
+D: Minor patches and fixes
+
+N: Howard Hinnant
+E: hhinnant@apple.com
+D: Architect and primary coauthor of libc++abi
+
+N: Dana Jansens
+E: danakj@chromium.org
+D: ARM EHABI Unwind & Exception Handling
+
+N: Nick Kledzik
+E: kledzik@apple.com
+
+N: Antoine Labour
+E: piman@chromium.org
+D: ARM EHABI Unwind & Exception Handling
+
+N: Bruce Mitchener, Jr.
+E: bruce.mitchener@gmail.com
+D: Minor typo fixes
+
+N: Andrew Morrow
+E: andrew.c.morrow@gmail.com
+D: Minor patches and fixes
+
+N: Erik Olofsson
+E: erik.olofsson@hansoft.se
+E: erik@olofsson.info
+D: Minor patches and fixes
+
+N: Jon Roelofs
+E: jroelofs@jroelofs.com
+D: ARM EHABI Unwind & Exception Handling, Bare-metal
+
+N: Nico Weber
+E: thakis@chromium.org
+D: ARM EHABI Unwind & Exception Handling
+
+N: Albert J. Wong
+E: ajwong@google.com
+D: ARM EHABI Unwind & Exception Handling
+
Index: contrib/libcxxabi/FREEBSD-upgrade
===================================================================
--- /dev/null
+++ contrib/libcxxabi/FREEBSD-upgrade
@@ -0,0 +1,4 @@
+$FreeBSD$
+
+The FreeBSD copy of libcxxabi This contains everything from the include and
+source directories upstream.
Index: contrib/libcxxabi/LICENSE.TXT
===================================================================
--- /dev/null
+++ contrib/libcxxabi/LICENSE.TXT
@@ -0,0 +1,311 @@
+==============================================================================
+The LLVM Project is under the Apache License v2.0 with LLVM Exceptions:
+==============================================================================
+
+ Apache License
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+ http://www.apache.org/licenses/
+
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+ has been advised of the possibility of such damages.
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+ the Work or Derivative Works thereof, You may choose to offer,
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+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
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+
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+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
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+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+
+---- LLVM Exceptions to the Apache 2.0 License ----
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into an Object form of such source code, you
+may redistribute such embedded portions in such Object form without complying
+with the conditions of Sections 4(a), 4(b) and 4(d) of the License.
+
+In addition, if you combine or link compiled forms of this Software with
+software that is licensed under the GPLv2 ("Combined Software") and if a
+court of competent jurisdiction determines that the patent provision (Section
+3), the indemnity provision (Section 9) or other Section of the License
+conflicts with the conditions of the GPLv2, you may retroactively and
+prospectively choose to deem waived or otherwise exclude such Section(s) of
+the License, but only in their entirety and only with respect to the Combined
+Software.
+
+==============================================================================
+Software from third parties included in the LLVM Project:
+==============================================================================
+The LLVM Project contains third party software which is under different license
+terms. All such code will be identified clearly using at least one of two
+mechanisms:
+1) It will be in a separate directory tree with its own `LICENSE.txt` or
+ `LICENSE` file at the top containing the specific license and restrictions
+ which apply to that software, or
+2) It will contain specific license and restriction terms at the top of every
+ file.
+
+==============================================================================
+Legacy LLVM License (https://llvm.org/docs/DeveloperPolicy.html#legacy):
+==============================================================================
+
+The libc++abi library is dual licensed under both the University of Illinois
+"BSD-Like" license and the MIT license. As a user of this code you may choose
+to use it under either license. As a contributor, you agree to allow your code
+to be used under both.
+
+Full text of the relevant licenses is included below.
+
+==============================================================================
+
+University of Illinois/NCSA
+Open Source License
+
+Copyright (c) 2009-2019 by the contributors listed in CREDITS.TXT
+
+All rights reserved.
+
+Developed by:
+
+ LLVM Team
+
+ University of Illinois at Urbana-Champaign
+
+ http://llvm.org
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal with
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimers.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimers in the
+ documentation and/or other materials provided with the distribution.
+
+ * Neither the names of the LLVM Team, University of Illinois at
+ Urbana-Champaign, nor the names of its contributors may be used to
+ endorse or promote products derived from this Software without specific
+ prior written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
+SOFTWARE.
+
+==============================================================================
+
+Copyright (c) 2009-2014 by the contributors listed in CREDITS.TXT
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
Index: contrib/libcxxabi/include/__cxxabi_config.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/include/__cxxabi_config.h
@@ -0,0 +1,72 @@
+//===-------------------------- __cxxabi_config.h -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ____CXXABI_CONFIG_H
+#define ____CXXABI_CONFIG_H
+
+#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
+ !defined(__ARM_DWARF_EH__)
+#define _LIBCXXABI_ARM_EHABI
+#endif
+
+#if !defined(__has_attribute)
+#define __has_attribute(_attribute_) 0
+#endif
+
+#if defined(_WIN32)
+ #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
+ #define _LIBCXXABI_HIDDEN
+ #define _LIBCXXABI_DATA_VIS
+ #define _LIBCXXABI_FUNC_VIS
+ #define _LIBCXXABI_TYPE_VIS
+ #elif defined(_LIBCXXABI_BUILDING_LIBRARY)
+ #define _LIBCXXABI_HIDDEN
+ #define _LIBCXXABI_DATA_VIS __declspec(dllexport)
+ #define _LIBCXXABI_FUNC_VIS __declspec(dllexport)
+ #define _LIBCXXABI_TYPE_VIS __declspec(dllexport)
+ #else
+ #define _LIBCXXABI_HIDDEN
+ #define _LIBCXXABI_DATA_VIS __declspec(dllimport)
+ #define _LIBCXXABI_FUNC_VIS __declspec(dllimport)
+ #define _LIBCXXABI_TYPE_VIS __declspec(dllimport)
+ #endif
+#else
+ #if !defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS)
+ #define _LIBCXXABI_HIDDEN __attribute__((__visibility__("hidden")))
+ #define _LIBCXXABI_DATA_VIS __attribute__((__visibility__("default")))
+ #define _LIBCXXABI_FUNC_VIS __attribute__((__visibility__("default")))
+ #if __has_attribute(__type_visibility__)
+ #define _LIBCXXABI_TYPE_VIS __attribute__((__type_visibility__("default")))
+ #else
+ #define _LIBCXXABI_TYPE_VIS __attribute__((__visibility__("default")))
+ #endif
+ #else
+ #define _LIBCXXABI_HIDDEN
+ #define _LIBCXXABI_DATA_VIS
+ #define _LIBCXXABI_FUNC_VIS
+ #define _LIBCXXABI_TYPE_VIS
+ #endif
+#endif
+
+#if defined(_WIN32)
+#define _LIBCXXABI_WEAK
+#else
+#define _LIBCXXABI_WEAK __attribute__((__weak__))
+#endif
+
+#if defined(__clang__)
+#define _LIBCXXABI_COMPILER_CLANG
+#endif
+
+#if __has_attribute(__no_sanitize__) && defined(_LIBCXXABI_COMPILER_CLANG)
+#define _LIBCXXABI_NO_CFI __attribute__((__no_sanitize__("cfi")))
+#else
+#define _LIBCXXABI_NO_CFI
+#endif
+
+#endif // ____CXXABI_CONFIG_H
Index: contrib/libcxxabi/include/cxxabi.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/include/cxxabi.h
@@ -0,0 +1,176 @@
+//===--------------------------- cxxabi.h ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __CXXABI_H
+#define __CXXABI_H
+
+/*
+ * This header provides the interface to the C++ ABI as defined at:
+ * http://www.codesourcery.com/cxx-abi/
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <__cxxabi_config.h>
+
+#define _LIBCPPABI_VERSION 1002
+#define _LIBCXXABI_NORETURN __attribute__((noreturn))
+
+#ifdef __cplusplus
+
+namespace std {
+#if defined(_WIN32)
+class _LIBCXXABI_TYPE_VIS type_info; // forward declaration
+#else
+class type_info; // forward declaration
+#endif
+}
+
+
+// runtime routines use C calling conventions, but are in __cxxabiv1 namespace
+namespace __cxxabiv1 {
+extern "C" {
+
+// 2.4.2 Allocating the Exception Object
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_allocate_exception(size_t thrown_size) throw();
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_free_exception(void *thrown_exception) throw();
+
+// 2.4.3 Throwing the Exception Object
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void
+__cxa_throw(void *thrown_exception, std::type_info *tinfo,
+ void (*dest)(void *));
+
+// 2.5.3 Exception Handlers
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_get_exception_ptr(void *exceptionObject) throw();
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_begin_catch(void *exceptionObject) throw();
+extern _LIBCXXABI_FUNC_VIS void __cxa_end_catch();
+#if defined(_LIBCXXABI_ARM_EHABI)
+extern _LIBCXXABI_FUNC_VIS bool
+__cxa_begin_cleanup(void *exceptionObject) throw();
+extern _LIBCXXABI_FUNC_VIS void __cxa_end_cleanup();
+#endif
+extern _LIBCXXABI_FUNC_VIS std::type_info *__cxa_current_exception_type();
+
+// 2.5.4 Rethrowing Exceptions
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_rethrow();
+
+// 2.6 Auxiliary Runtime APIs
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_bad_cast(void);
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_bad_typeid(void);
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void
+__cxa_throw_bad_array_new_length(void);
+
+// 3.2.6 Pure Virtual Function API
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_pure_virtual(void);
+
+// 3.2.7 Deleted Virtual Function API
+extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_deleted_virtual(void);
+
+// 3.3.2 One-time Construction API
+#ifdef __arm__
+extern _LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(uint32_t *);
+extern _LIBCXXABI_FUNC_VIS void __cxa_guard_release(uint32_t *);
+extern _LIBCXXABI_FUNC_VIS void __cxa_guard_abort(uint32_t *);
+#else
+extern _LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(uint64_t *);
+extern _LIBCXXABI_FUNC_VIS void __cxa_guard_release(uint64_t *);
+extern _LIBCXXABI_FUNC_VIS void __cxa_guard_abort(uint64_t *);
+#endif
+
+// 3.3.3 Array Construction and Destruction API
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new2(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *),
+ void *(*alloc)(size_t), void (*dealloc)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new3(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *),
+ void *(*alloc)(size_t), void (*dealloc)(void *, size_t));
+
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_vec_ctor(void *array_address, size_t element_count, size_t element_size,
+ void (*constructor)(void *), void (*destructor)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void __cxa_vec_dtor(void *array_address,
+ size_t element_count,
+ size_t element_size,
+ void (*destructor)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void __cxa_vec_cleanup(void *array_address,
+ size_t element_count,
+ size_t element_size,
+ void (*destructor)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void __cxa_vec_delete(void *array_address,
+ size_t element_size,
+ size_t padding_size,
+ void (*destructor)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_vec_delete2(void *array_address, size_t element_size, size_t padding_size,
+ void (*destructor)(void *), void (*dealloc)(void *));
+
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_vec_delete3(void *__array_address, size_t element_size,
+ size_t padding_size, void (*destructor)(void *),
+ void (*dealloc)(void *, size_t));
+
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_vec_cctor(void *dest_array, void *src_array, size_t element_count,
+ size_t element_size, void (*constructor)(void *, void *),
+ void (*destructor)(void *));
+
+// 3.3.5.3 Runtime API
+extern _LIBCXXABI_FUNC_VIS int __cxa_atexit(void (*f)(void *), void *p,
+ void *d);
+extern _LIBCXXABI_FUNC_VIS int __cxa_finalize(void *);
+
+// 3.4 Demangler API
+extern _LIBCXXABI_FUNC_VIS char *__cxa_demangle(const char *mangled_name,
+ char *output_buffer,
+ size_t *length, int *status);
+
+// Apple additions to support C++ 0x exception_ptr class
+// These are primitives to wrap a smart pointer around an exception object
+extern _LIBCXXABI_FUNC_VIS void *__cxa_current_primary_exception() throw();
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_rethrow_primary_exception(void *primary_exception);
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_increment_exception_refcount(void *primary_exception) throw();
+extern _LIBCXXABI_FUNC_VIS void
+__cxa_decrement_exception_refcount(void *primary_exception) throw();
+
+// Apple extension to support std::uncaught_exception()
+extern _LIBCXXABI_FUNC_VIS bool __cxa_uncaught_exception() throw();
+extern _LIBCXXABI_FUNC_VIS unsigned int __cxa_uncaught_exceptions() throw();
+
+#if defined(__linux__) || defined(__Fuchsia__)
+// Linux and Fuchsia TLS support. Not yet an official part of the Itanium ABI.
+// https://sourceware.org/glibc/wiki/Destructor%20support%20for%20thread_local%20variables
+extern _LIBCXXABI_FUNC_VIS int __cxa_thread_atexit(void (*)(void *), void *,
+ void *) throw();
+#endif
+
+} // extern "C"
+} // namespace __cxxabiv1
+
+namespace abi = __cxxabiv1;
+
+#endif // __cplusplus
+
+#endif // __CXXABI_H
Index: contrib/libcxxabi/src/CMakeLists.txt
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/CMakeLists.txt
@@ -0,0 +1,275 @@
+# Get sources
+set(LIBCXXABI_SOURCES
+ # C++ABI files
+ cxa_aux_runtime.cpp
+ cxa_default_handlers.cpp
+ cxa_demangle.cpp
+ cxa_exception_storage.cpp
+ cxa_guard.cpp
+ cxa_handlers.cpp
+ cxa_unexpected.cpp
+ cxa_vector.cpp
+ cxa_virtual.cpp
+ # C++ STL files
+ stdlib_exception.cpp
+ stdlib_stdexcept.cpp
+ stdlib_typeinfo.cpp
+ # Internal files
+ abort_message.cpp
+ fallback_malloc.cpp
+ private_typeinfo.cpp
+)
+
+if (LIBCXXABI_ENABLE_NEW_DELETE_DEFINITIONS)
+ list(APPEND LIBCXXABI_SOURCES stdlib_new_delete.cpp)
+endif()
+
+if (LIBCXXABI_ENABLE_EXCEPTIONS)
+ list(APPEND LIBCXXABI_SOURCES cxa_exception.cpp)
+ list(APPEND LIBCXXABI_SOURCES cxa_personality.cpp)
+else()
+ list(APPEND LIBCXXABI_SOURCES cxa_noexception.cpp)
+endif()
+
+if (LIBCXXABI_ENABLE_THREADS AND (UNIX OR FUCHSIA) AND NOT (APPLE OR CYGWIN))
+ list(APPEND LIBCXXABI_SOURCES cxa_thread_atexit.cpp)
+endif()
+
+set(LIBCXXABI_HEADERS ../include/cxxabi.h)
+
+# Add all the headers to the project for IDEs.
+if (MSVC_IDE OR XCODE)
+ # Force them all into the headers dir on MSVC, otherwise they end up at
+ # project scope because they don't have extensions.
+ if (MSVC_IDE)
+ source_group("Header Files" FILES ${LIBCXXABI_HEADERS})
+ endif()
+endif()
+
+include_directories("${LIBCXXABI_LIBCXX_INCLUDES}")
+
+if (LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)
+ add_definitions(-DHAVE___CXA_THREAD_ATEXIT_IMPL)
+endif()
+
+if (LIBCXXABI_ENABLE_THREADS)
+ add_library_flags_if(LIBCXXABI_HAS_PTHREAD_LIB pthread)
+endif()
+
+add_library_flags_if(LIBCXXABI_HAS_C_LIB c)
+if (LIBCXXABI_USE_LLVM_UNWINDER)
+ # Prefer using the in-tree version of libunwind, either shared or static. If
+ # none are found fall back to using -lunwind.
+ # FIXME: Is it correct to prefer the static version of libunwind?
+ if (NOT LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY AND (TARGET unwind_shared OR HAVE_LIBUNWIND))
+ list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind_shared)
+ elseif (LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY AND (TARGET unwind_static OR HAVE_LIBUNWIND))
+ list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind_static)
+ else()
+ list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind)
+ endif()
+ if (NOT LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY AND (TARGET unwind_shared OR HAVE_LIBUNWIND))
+ list(APPEND LIBCXXABI_STATIC_LIBRARIES unwind_shared)
+ elseif (LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY AND (TARGET unwind_static OR HAVE_LIBUNWIND))
+ # We handle this by directly merging libunwind objects into libc++abi.
+ else()
+ list(APPEND LIBCXXABI_STATIC_LIBRARIES unwind)
+ endif()
+else()
+ add_library_flags_if(LIBCXXABI_HAS_GCC_S_LIB gcc_s)
+endif()
+if (MINGW)
+ # MINGW_LIBRARIES is defined in config-ix.cmake
+ list(APPEND LIBCXXABI_LIBRARIES ${MINGW_LIBRARIES})
+endif()
+
+# Setup flags.
+add_link_flags_if_supported(-nodefaultlibs)
+
+set(LIBCXXABI_SHARED_LINK_FLAGS)
+
+if ( APPLE )
+ if ( CMAKE_OSX_DEPLOYMENT_TARGET STREQUAL "10.6" )
+ list(APPEND LIBCXXABI_COMPILE_FLAGS "-U__STRICT_ANSI__")
+ list(APPEND LIBCXXABI_SHARED_LINK_FLAGS
+ "-compatibility_version 1"
+ "-current_version 1"
+ "-install_name /usr/lib/libc++abi.1.dylib")
+ list(APPEND LIBCXXABI_LINK_FLAGS
+ "/usr/lib/libSystem.B.dylib")
+ else()
+ list(APPEND LIBCXXABI_SHARED_LINK_FLAGS
+ "-compatibility_version 1"
+ "-install_name /usr/lib/libc++abi.1.dylib")
+ endif()
+
+ if (LLVM_USE_SANITIZER)
+ if (("${LLVM_USE_SANITIZER}" STREQUAL "Address") OR
+ ("${LLVM_USE_SANITIZER}" STREQUAL "Address;Undefined") OR
+ ("${LLVM_USE_SANITIZER}" STREQUAL "Undefined;Address"))
+ set(LIBFILE "libclang_rt.asan_osx_dynamic.dylib")
+ elseif("${LLVM_USE_SANITIZER}" STREQUAL "Undefined")
+ set(LIBFILE "libclang_rt.ubsan_osx_dynamic.dylib")
+ elseif("${LLVM_USE_SANITIZER}" STREQUAL "Thread")
+ set(LIBFILE "libclang_rt.tsan_osx_dynamic.dylib")
+ else()
+ message(WARNING "LLVM_USE_SANITIZER=${LLVM_USE_SANITIZER} is not supported on OS X")
+ endif()
+ if (LIBFILE)
+ find_compiler_rt_dir(LIBDIR)
+ if (NOT IS_DIRECTORY "${LIBDIR}")
+ message(FATAL_ERROR "Cannot find compiler-rt directory on OS X required for LLVM_USE_SANITIZER")
+ endif()
+ set(LIBCXXABI_SANITIZER_LIBRARY "${LIBDIR}/${LIBFILE}")
+ set(LIBCXXABI_SANITIZER_LIBRARY "${LIBCXXABI_SANITIZER_LIBRARY}" PARENT_SCOPE)
+ message(STATUS "Manually linking compiler-rt library: ${LIBCXXABI_SANITIZER_LIBRARY}")
+ add_library_flags("${LIBCXXABI_SANITIZER_LIBRARY}")
+ add_link_flags("-Wl,-rpath,${LIBDIR}")
+ endif()
+ endif()
+endif()
+
+split_list(LIBCXXABI_COMPILE_FLAGS)
+split_list(LIBCXXABI_LINK_FLAGS)
+split_list(LIBCXXABI_SHARED_LINK_FLAGS)
+
+# FIXME: libc++abi.so will not link when modules are enabled because it depends
+# on symbols defined in libc++.so which has not yet been built.
+if (LLVM_ENABLE_MODULES)
+ string(REPLACE "-Wl,-z,defs" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
+endif()
+
+macro(cxxabi_object_library name)
+ cmake_parse_arguments(ARGS "" "" "DEFINES;FLAGS" ${ARGN})
+
+ # Add a object library that contains the compiled source files.
+ add_library(${name} OBJECT ${LIBCXXABI_SOURCES} ${LIBCXXABI_HEADERS})
+ set_target_properties(${name}
+ PROPERTIES
+ CXX_EXTENSIONS
+ OFF
+ CXX_STANDARD
+ 11
+ CXX_STANDARD_REQUIRED
+ ON
+ COMPILE_FLAGS
+ "${LIBCXXABI_COMPILE_FLAGS}"
+ POSITION_INDEPENDENT_CODE
+ ON)
+
+ if(ARGS_DEFINES)
+ target_compile_definitions(${name} PRIVATE ${ARGS_DEFINES})
+ endif()
+
+ if(ARGS_FLAGS)
+ target_compile_options(${name} PRIVATE ${ARGS_FLAGS})
+ endif()
+endmacro()
+
+if(LIBCXXABI_HERMETIC_STATIC_LIBRARY)
+ append_flags_if_supported(CXXABI_STATIC_OBJECTS_FLAGS -fvisibility=hidden)
+ append_flags_if_supported(CXXABI_STATIC_OBJECTS_FLAGS -fvisibility-global-new-delete-hidden)
+ cxxabi_object_library(cxxabi_static_objects
+ DEFINES
+ _LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS
+ _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS
+ FLAGS ${CXXABI_STATIC_OBJECTS_FLAGS})
+ cxxabi_object_library(cxxabi_shared_objects)
+ set(cxxabi_static_sources $<TARGET_OBJECTS:cxxabi_static_objects>)
+ set(cxxabi_shared_sources $<TARGET_OBJECTS:cxxabi_shared_objects>)
+else()
+ cxxabi_object_library(cxxabi_objects)
+ set(cxxabi_static_sources $<TARGET_OBJECTS:cxxabi_objects>)
+ set(cxxabi_shared_sources $<TARGET_OBJECTS:cxxabi_objects>)
+endif()
+
+# Build the shared library.
+if (LIBCXXABI_ENABLE_SHARED)
+ add_library(cxxabi_shared SHARED ${cxxabi_shared_sources})
+ if(COMMAND llvm_setup_rpath)
+ llvm_setup_rpath(cxxabi_shared)
+ endif()
+ target_link_libraries(cxxabi_shared PRIVATE ${LIBCXXABI_SHARED_LIBRARIES} ${LIBCXXABI_LIBRARIES})
+ set_target_properties(cxxabi_shared
+ PROPERTIES
+ CXX_EXTENSIONS
+ OFF
+ CXX_STANDARD
+ 11
+ CXX_STANDARD_REQUIRED
+ ON
+ LINK_FLAGS
+ "${LIBCXXABI_LINK_FLAGS} ${LIBCXXABI_SHARED_LINK_FLAGS}"
+ OUTPUT_NAME
+ "c++abi"
+ POSITION_INDEPENDENT_CODE
+ ON
+ SOVERSION
+ "1"
+ VERSION
+ "1.0")
+ list(APPEND LIBCXXABI_BUILD_TARGETS "cxxabi_shared")
+ if (LIBCXXABI_INSTALL_SHARED_LIBRARY)
+ list(APPEND LIBCXXABI_INSTALL_TARGETS "cxxabi_shared")
+ endif()
+endif()
+
+# Build the static library.
+if (LIBCXXABI_ENABLE_STATIC)
+ if (LIBCXXABI_USE_LLVM_UNWINDER AND LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY)
+ if (TARGET unwind_static OR HAVE_LIBUNWIND)
+ if(LIBUNWIND_HERMETIC_STATIC_LIBRARY)
+ list(APPEND cxxabi_static_sources $<TARGET_OBJECTS:unwind_static_objects>)
+ else()
+ list(APPEND cxxabi_static_sources $<TARGET_OBJECTS:unwind_objects>)
+ endif()
+ endif()
+ endif()
+ add_library(cxxabi_static STATIC ${cxxabi_static_sources})
+ target_link_libraries(cxxabi_static PRIVATE ${LIBCXXABI_STATIC_LIBRARIES} ${LIBCXXABI_LIBRARIES})
+ set_target_properties(cxxabi_static
+ PROPERTIES
+ CXX_EXTENSIONS
+ OFF
+ CXX_STANDARD
+ 11
+ CXX_STANDARD_REQUIRED
+ ON
+ LINK_FLAGS
+ "${LIBCXXABI_LINK_FLAGS}"
+ OUTPUT_NAME
+ "c++abi"
+ POSITION_INDEPENDENT_CODE
+ ON)
+ list(APPEND LIBCXXABI_BUILD_TARGETS "cxxabi_static")
+ if (LIBCXXABI_INSTALL_STATIC_LIBRARY)
+ list(APPEND LIBCXXABI_INSTALL_TARGETS "cxxabi_static")
+ endif()
+endif()
+
+# Add a meta-target for both libraries.
+add_custom_target(cxxabi DEPENDS ${LIBCXXABI_BUILD_TARGETS})
+
+if (LIBCXXABI_INSTALL_LIBRARY)
+ install(TARGETS ${LIBCXXABI_INSTALL_TARGETS}
+ LIBRARY DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
+ ARCHIVE DESTINATION ${LIBCXXABI_INSTALL_PREFIX}lib${LIBCXXABI_LIBDIR_SUFFIX} COMPONENT cxxabi
+ )
+endif()
+
+if (NOT CMAKE_CONFIGURATION_TYPES AND LIBCXXABI_INSTALL_LIBRARY)
+ add_custom_target(install-cxxabi
+ DEPENDS cxxabi
+ COMMAND "${CMAKE_COMMAND}"
+ -DCMAKE_INSTALL_COMPONENT=cxxabi
+ -P "${LIBCXXABI_BINARY_DIR}/cmake_install.cmake")
+ add_custom_target(install-cxxabi-stripped
+ DEPENDS cxxabi
+ COMMAND "${CMAKE_COMMAND}"
+ -DCMAKE_INSTALL_COMPONENT=cxxabi
+ -DCMAKE_INSTALL_DO_STRIP=1
+ -P "${LIBCXXABI_BINARY_DIR}/cmake_install.cmake")
+
+ # TODO: This is a legacy target name and should be removed at some point.
+ add_custom_target(install-libcxxabi DEPENDS install-cxxabi)
+endif()
Index: contrib/libcxxabi/src/abort_message.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/abort_message.h
@@ -0,0 +1,26 @@
+//===-------------------------- abort_message.h-----------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __ABORT_MESSAGE_H_
+#define __ABORT_MESSAGE_H_
+
+#include "cxxabi.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+_LIBCXXABI_HIDDEN _LIBCXXABI_NORETURN void
+abort_message(const char *format, ...) __attribute__((format(printf, 1, 2)));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
Index: contrib/libcxxabi/src/abort_message.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/abort_message.cpp
@@ -0,0 +1,77 @@
+//===------------------------- abort_message.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include "abort_message.h"
+
+#ifdef __BIONIC__
+#include <android/api-level.h>
+#if __ANDROID_API__ >= 21
+#include <syslog.h>
+extern "C" void android_set_abort_message(const char* msg);
+#else
+#include <assert.h>
+#endif // __ANDROID_API__ >= 21
+#endif // __BIONIC__
+
+#ifdef __APPLE__
+# if defined(__has_include) && __has_include(<CrashReporterClient.h>)
+# define HAVE_CRASHREPORTERCLIENT_H
+# include <CrashReporterClient.h>
+# endif
+#endif
+
+void abort_message(const char* format, ...)
+{
+ // write message to stderr
+#if !defined(NDEBUG) || !defined(LIBCXXABI_BAREMETAL)
+#ifdef __APPLE__
+ fprintf(stderr, "libc++abi.dylib: ");
+#endif
+ va_list list;
+ va_start(list, format);
+ vfprintf(stderr, format, list);
+ va_end(list);
+ fprintf(stderr, "\n");
+#endif
+
+#if defined(__APPLE__) && defined(HAVE_CRASHREPORTERCLIENT_H)
+ // record message in crash report
+ char* buffer;
+ va_list list2;
+ va_start(list2, format);
+ vasprintf(&buffer, format, list2);
+ va_end(list2);
+ CRSetCrashLogMessage(buffer);
+#elif defined(__BIONIC__)
+ char* buffer;
+ va_list list2;
+ va_start(list2, format);
+ vasprintf(&buffer, format, list2);
+ va_end(list2);
+
+#if __ANDROID_API__ >= 21
+ // Show error in tombstone.
+ android_set_abort_message(buffer);
+
+ // Show error in logcat.
+ openlog("libc++abi", 0, 0);
+ syslog(LOG_CRIT, "%s", buffer);
+ closelog();
+#else
+ // The good error reporting wasn't available in Android until L. Since we're
+ // about to abort anyway, just call __assert2, which will log _somewhere_
+ // (tombstone and/or logcat) in older releases.
+ __assert2(__FILE__, __LINE__, __func__, buffer);
+#endif // __ANDROID_API__ >= 21
+#endif // __BIONIC__
+
+ abort();
+}
Index: contrib/libcxxabi/src/cxa_aux_runtime.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_aux_runtime.cpp
@@ -0,0 +1,43 @@
+//===------------------------ cxa_aux_runtime.cpp -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Auxiliary Runtime APIs"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html#cxx-aux
+//===----------------------------------------------------------------------===//
+
+#include "cxxabi.h"
+#include <new>
+#include <typeinfo>
+
+namespace __cxxabiv1 {
+extern "C" {
+_LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_bad_cast(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ throw std::bad_cast();
+#else
+ std::terminate();
+#endif
+}
+
+_LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void __cxa_bad_typeid(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ throw std::bad_typeid();
+#else
+ std::terminate();
+#endif
+}
+
+_LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN void
+__cxa_throw_bad_array_new_length(void) {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ throw std::bad_array_new_length();
+#else
+ std::terminate();
+#endif
+}
+} // extern "C"
+} // abi
Index: contrib/libcxxabi/src/cxa_default_handlers.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_default_handlers.cpp
@@ -0,0 +1,122 @@
+//===------------------------- cxa_default_handlers.cpp -------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the default terminate_handler and unexpected_handler.
+//===----------------------------------------------------------------------===//
+
+#include <stdexcept>
+#include <new>
+#include <exception>
+#include <cstdlib>
+#include "abort_message.h"
+#include "cxxabi.h"
+#include "cxa_handlers.hpp"
+#include "cxa_exception.hpp"
+#include "private_typeinfo.h"
+#include "include/atomic_support.h"
+
+#if !defined(LIBCXXABI_SILENT_TERMINATE)
+static const char* cause = "uncaught";
+
+__attribute__((noreturn))
+static void demangling_terminate_handler()
+{
+ // If there might be an uncaught exception
+ using namespace __cxxabiv1;
+ __cxa_eh_globals* globals = __cxa_get_globals_fast();
+ if (globals)
+ {
+ __cxa_exception* exception_header = globals->caughtExceptions;
+ // If there is an uncaught exception
+ if (exception_header)
+ {
+ _Unwind_Exception* unwind_exception =
+ reinterpret_cast<_Unwind_Exception*>(exception_header + 1) - 1;
+ if (__isOurExceptionClass(unwind_exception))
+ {
+ void* thrown_object =
+ __getExceptionClass(unwind_exception) == kOurDependentExceptionClass ?
+ ((__cxa_dependent_exception*)exception_header)->primaryException :
+ exception_header + 1;
+ const __shim_type_info* thrown_type =
+ static_cast<const __shim_type_info*>(exception_header->exceptionType);
+ // Try to get demangled name of thrown_type
+ int status;
+ char buf[1024];
+ size_t len = sizeof(buf);
+ const char* name = __cxa_demangle(thrown_type->name(), buf, &len, &status);
+ if (status != 0)
+ name = thrown_type->name();
+ // If the uncaught exception can be caught with std::exception&
+ const __shim_type_info* catch_type =
+ static_cast<const __shim_type_info*>(&typeid(std::exception));
+ if (catch_type->can_catch(thrown_type, thrown_object))
+ {
+ // Include the what() message from the exception
+ const std::exception* e = static_cast<const std::exception*>(thrown_object);
+ abort_message("terminating with %s exception of type %s: %s",
+ cause, name, e->what());
+ }
+ else
+ // Else just note that we're terminating with an exception
+ abort_message("terminating with %s exception of type %s",
+ cause, name);
+ }
+ else
+ // Else we're terminating with a foreign exception
+ abort_message("terminating with %s foreign exception", cause);
+ }
+ }
+ // Else just note that we're terminating
+ abort_message("terminating");
+}
+
+__attribute__((noreturn))
+static void demangling_unexpected_handler()
+{
+ cause = "unexpected";
+ std::terminate();
+}
+
+static std::terminate_handler default_terminate_handler = demangling_terminate_handler;
+static std::terminate_handler default_unexpected_handler = demangling_unexpected_handler;
+#else
+static std::terminate_handler default_terminate_handler = std::abort;
+static std::terminate_handler default_unexpected_handler = std::terminate;
+#endif
+
+//
+// Global variables that hold the pointers to the current handler
+//
+_LIBCXXABI_DATA_VIS
+std::terminate_handler __cxa_terminate_handler = default_terminate_handler;
+
+_LIBCXXABI_DATA_VIS
+std::unexpected_handler __cxa_unexpected_handler = default_unexpected_handler;
+
+namespace std
+{
+
+unexpected_handler
+set_unexpected(unexpected_handler func) _NOEXCEPT
+{
+ if (func == 0)
+ func = default_unexpected_handler;
+ return __libcpp_atomic_exchange(&__cxa_unexpected_handler, func,
+ _AO_Acq_Rel);
+}
+
+terminate_handler
+set_terminate(terminate_handler func) _NOEXCEPT
+{
+ if (func == 0)
+ func = default_terminate_handler;
+ return __libcpp_atomic_exchange(&__cxa_terminate_handler, func,
+ _AO_Acq_Rel);
+}
+
+}
Index: contrib/libcxxabi/src/cxa_demangle.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_demangle.cpp
@@ -0,0 +1,364 @@
+//===-------------------------- cxa_demangle.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// FIXME: (possibly) incomplete list of features that clang mangles that this
+// file does not yet support:
+// - C++ modules TS
+
+#include "demangle/ItaniumDemangle.h"
+#include "__cxxabi_config.h"
+#include <cassert>
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <functional>
+#include <numeric>
+#include <utility>
+
+using namespace itanium_demangle;
+
+constexpr const char *itanium_demangle::FloatData<float>::spec;
+constexpr const char *itanium_demangle::FloatData<double>::spec;
+constexpr const char *itanium_demangle::FloatData<long double>::spec;
+
+// <discriminator> := _ <non-negative number> # when number < 10
+// := __ <non-negative number> _ # when number >= 10
+// extension := decimal-digit+ # at the end of string
+const char *itanium_demangle::parse_discriminator(const char *first,
+ const char *last) {
+ // parse but ignore discriminator
+ if (first != last) {
+ if (*first == '_') {
+ const char *t1 = first + 1;
+ if (t1 != last) {
+ if (std::isdigit(*t1))
+ first = t1 + 1;
+ else if (*t1 == '_') {
+ for (++t1; t1 != last && std::isdigit(*t1); ++t1)
+ ;
+ if (t1 != last && *t1 == '_')
+ first = t1 + 1;
+ }
+ }
+ } else if (std::isdigit(*first)) {
+ const char *t1 = first + 1;
+ for (; t1 != last && std::isdigit(*t1); ++t1)
+ ;
+ if (t1 == last)
+ first = last;
+ }
+ }
+ return first;
+}
+
+#ifndef NDEBUG
+namespace {
+struct DumpVisitor {
+ unsigned Depth = 0;
+ bool PendingNewline = false;
+
+ template<typename NodeT> static constexpr bool wantsNewline(const NodeT *) {
+ return true;
+ }
+ static bool wantsNewline(NodeArray A) { return !A.empty(); }
+ static constexpr bool wantsNewline(...) { return false; }
+
+ template<typename ...Ts> static bool anyWantNewline(Ts ...Vs) {
+ for (bool B : {wantsNewline(Vs)...})
+ if (B)
+ return true;
+ return false;
+ }
+
+ void printStr(const char *S) { fprintf(stderr, "%s", S); }
+ void print(StringView SV) {
+ fprintf(stderr, "\"%.*s\"", (int)SV.size(), SV.begin());
+ }
+ void print(const Node *N) {
+ if (N)
+ N->visit(std::ref(*this));
+ else
+ printStr("<null>");
+ }
+ void print(NodeOrString NS) {
+ if (NS.isNode())
+ print(NS.asNode());
+ else if (NS.isString())
+ print(NS.asString());
+ else
+ printStr("NodeOrString()");
+ }
+ void print(NodeArray A) {
+ ++Depth;
+ printStr("{");
+ bool First = true;
+ for (const Node *N : A) {
+ if (First)
+ print(N);
+ else
+ printWithComma(N);
+ First = false;
+ }
+ printStr("}");
+ --Depth;
+ }
+
+ // Overload used when T is exactly 'bool', not merely convertible to 'bool'.
+ void print(bool B) { printStr(B ? "true" : "false"); }
+
+ template <class T>
+ typename std::enable_if<std::is_unsigned<T>::value>::type print(T N) {
+ fprintf(stderr, "%llu", (unsigned long long)N);
+ }
+
+ template <class T>
+ typename std::enable_if<std::is_signed<T>::value>::type print(T N) {
+ fprintf(stderr, "%lld", (long long)N);
+ }
+
+ void print(ReferenceKind RK) {
+ switch (RK) {
+ case ReferenceKind::LValue:
+ return printStr("ReferenceKind::LValue");
+ case ReferenceKind::RValue:
+ return printStr("ReferenceKind::RValue");
+ }
+ }
+ void print(FunctionRefQual RQ) {
+ switch (RQ) {
+ case FunctionRefQual::FrefQualNone:
+ return printStr("FunctionRefQual::FrefQualNone");
+ case FunctionRefQual::FrefQualLValue:
+ return printStr("FunctionRefQual::FrefQualLValue");
+ case FunctionRefQual::FrefQualRValue:
+ return printStr("FunctionRefQual::FrefQualRValue");
+ }
+ }
+ void print(Qualifiers Qs) {
+ if (!Qs) return printStr("QualNone");
+ struct QualName { Qualifiers Q; const char *Name; } Names[] = {
+ {QualConst, "QualConst"},
+ {QualVolatile, "QualVolatile"},
+ {QualRestrict, "QualRestrict"},
+ };
+ for (QualName Name : Names) {
+ if (Qs & Name.Q) {
+ printStr(Name.Name);
+ Qs = Qualifiers(Qs & ~Name.Q);
+ if (Qs) printStr(" | ");
+ }
+ }
+ }
+ void print(SpecialSubKind SSK) {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return printStr("SpecialSubKind::allocator");
+ case SpecialSubKind::basic_string:
+ return printStr("SpecialSubKind::basic_string");
+ case SpecialSubKind::string:
+ return printStr("SpecialSubKind::string");
+ case SpecialSubKind::istream:
+ return printStr("SpecialSubKind::istream");
+ case SpecialSubKind::ostream:
+ return printStr("SpecialSubKind::ostream");
+ case SpecialSubKind::iostream:
+ return printStr("SpecialSubKind::iostream");
+ }
+ }
+
+ void newLine() {
+ printStr("\n");
+ for (unsigned I = 0; I != Depth; ++I)
+ printStr(" ");
+ PendingNewline = false;
+ }
+
+ template<typename T> void printWithPendingNewline(T V) {
+ print(V);
+ if (wantsNewline(V))
+ PendingNewline = true;
+ }
+
+ template<typename T> void printWithComma(T V) {
+ if (PendingNewline || wantsNewline(V)) {
+ printStr(",");
+ newLine();
+ } else {
+ printStr(", ");
+ }
+
+ printWithPendingNewline(V);
+ }
+
+ struct CtorArgPrinter {
+ DumpVisitor &Visitor;
+
+ template<typename T, typename ...Rest> void operator()(T V, Rest ...Vs) {
+ if (Visitor.anyWantNewline(V, Vs...))
+ Visitor.newLine();
+ Visitor.printWithPendingNewline(V);
+ int PrintInOrder[] = { (Visitor.printWithComma(Vs), 0)..., 0 };
+ (void)PrintInOrder;
+ }
+ };
+
+ template<typename NodeT> void operator()(const NodeT *Node) {
+ Depth += 2;
+ fprintf(stderr, "%s(", itanium_demangle::NodeKind<NodeT>::name());
+ Node->match(CtorArgPrinter{*this});
+ fprintf(stderr, ")");
+ Depth -= 2;
+ }
+
+ void operator()(const ForwardTemplateReference *Node) {
+ Depth += 2;
+ fprintf(stderr, "ForwardTemplateReference(");
+ if (Node->Ref && !Node->Printing) {
+ Node->Printing = true;
+ CtorArgPrinter{*this}(Node->Ref);
+ Node->Printing = false;
+ } else {
+ CtorArgPrinter{*this}(Node->Index);
+ }
+ fprintf(stderr, ")");
+ Depth -= 2;
+ }
+};
+}
+
+void itanium_demangle::Node::dump() const {
+ DumpVisitor V;
+ visit(std::ref(V));
+ V.newLine();
+}
+#endif
+
+namespace {
+class BumpPointerAllocator {
+ struct BlockMeta {
+ BlockMeta* Next;
+ size_t Current;
+ };
+
+ static constexpr size_t AllocSize = 4096;
+ static constexpr size_t UsableAllocSize = AllocSize - sizeof(BlockMeta);
+
+ alignas(long double) char InitialBuffer[AllocSize];
+ BlockMeta* BlockList = nullptr;
+
+ void grow() {
+ char* NewMeta = static_cast<char *>(std::malloc(AllocSize));
+ if (NewMeta == nullptr)
+ std::terminate();
+ BlockList = new (NewMeta) BlockMeta{BlockList, 0};
+ }
+
+ void* allocateMassive(size_t NBytes) {
+ NBytes += sizeof(BlockMeta);
+ BlockMeta* NewMeta = reinterpret_cast<BlockMeta*>(std::malloc(NBytes));
+ if (NewMeta == nullptr)
+ std::terminate();
+ BlockList->Next = new (NewMeta) BlockMeta{BlockList->Next, 0};
+ return static_cast<void*>(NewMeta + 1);
+ }
+
+public:
+ BumpPointerAllocator()
+ : BlockList(new (InitialBuffer) BlockMeta{nullptr, 0}) {}
+
+ void* allocate(size_t N) {
+ N = (N + 15u) & ~15u;
+ if (N + BlockList->Current >= UsableAllocSize) {
+ if (N > UsableAllocSize)
+ return allocateMassive(N);
+ grow();
+ }
+ BlockList->Current += N;
+ return static_cast<void*>(reinterpret_cast<char*>(BlockList + 1) +
+ BlockList->Current - N);
+ }
+
+ void reset() {
+ while (BlockList) {
+ BlockMeta* Tmp = BlockList;
+ BlockList = BlockList->Next;
+ if (reinterpret_cast<char*>(Tmp) != InitialBuffer)
+ std::free(Tmp);
+ }
+ BlockList = new (InitialBuffer) BlockMeta{nullptr, 0};
+ }
+
+ ~BumpPointerAllocator() { reset(); }
+};
+
+class DefaultAllocator {
+ BumpPointerAllocator Alloc;
+
+public:
+ void reset() { Alloc.reset(); }
+
+ template<typename T, typename ...Args> T *makeNode(Args &&...args) {
+ return new (Alloc.allocate(sizeof(T)))
+ T(std::forward<Args>(args)...);
+ }
+
+ void *allocateNodeArray(size_t sz) {
+ return Alloc.allocate(sizeof(Node *) * sz);
+ }
+};
+} // unnamed namespace
+
+//===----------------------------------------------------------------------===//
+// Code beyond this point should not be synchronized with LLVM.
+//===----------------------------------------------------------------------===//
+
+using Demangler = itanium_demangle::ManglingParser<DefaultAllocator>;
+
+namespace {
+enum : int {
+ demangle_invalid_args = -3,
+ demangle_invalid_mangled_name = -2,
+ demangle_memory_alloc_failure = -1,
+ demangle_success = 0,
+};
+}
+
+namespace __cxxabiv1 {
+extern "C" _LIBCXXABI_FUNC_VIS char *
+__cxa_demangle(const char *MangledName, char *Buf, size_t *N, int *Status) {
+ if (MangledName == nullptr || (Buf != nullptr && N == nullptr)) {
+ if (Status)
+ *Status = demangle_invalid_args;
+ return nullptr;
+ }
+
+ int InternalStatus = demangle_success;
+ Demangler Parser(MangledName, MangledName + std::strlen(MangledName));
+ OutputStream S;
+
+ Node *AST = Parser.parse();
+
+ if (AST == nullptr)
+ InternalStatus = demangle_invalid_mangled_name;
+ else if (!initializeOutputStream(Buf, N, S, 1024))
+ InternalStatus = demangle_memory_alloc_failure;
+ else {
+ assert(Parser.ForwardTemplateRefs.empty());
+ AST->print(S);
+ S += '\0';
+ if (N != nullptr)
+ *N = S.getCurrentPosition();
+ Buf = S.getBuffer();
+ }
+
+ if (Status)
+ *Status = InternalStatus;
+ return InternalStatus == demangle_success ? Buf : nullptr;
+}
+} // __cxxabiv1
Index: contrib/libcxxabi/src/cxa_exception.hpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_exception.hpp
@@ -0,0 +1,119 @@
+//===------------------------- cxa_exception.hpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Exception Handling APIs"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _CXA_EXCEPTION_H
+#define _CXA_EXCEPTION_H
+
+#include <exception> // for std::unexpected_handler and std::terminate_handler
+#include "cxxabi.h"
+#include "unwind.h"
+
+namespace __cxxabiv1 {
+
+static const uint64_t kOurExceptionClass = 0x434C4E47432B2B00; // CLNGC++\0
+static const uint64_t kOurDependentExceptionClass = 0x434C4E47432B2B01; // CLNGC++\1
+static const uint64_t get_vendor_and_language = 0xFFFFFFFFFFFFFF00; // mask for CLNGC++
+
+uint64_t __getExceptionClass (const _Unwind_Exception*);
+void __setExceptionClass ( _Unwind_Exception*, uint64_t);
+bool __isOurExceptionClass(const _Unwind_Exception*);
+
+struct _LIBCXXABI_HIDDEN __cxa_exception {
+#if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI)
+ // This is a new field to support C++ 0x exception_ptr.
+ // For binary compatibility it is at the start of this
+ // struct which is prepended to the object thrown in
+ // __cxa_allocate_exception.
+ size_t referenceCount;
+#endif
+
+ // Manage the exception object itself.
+ std::type_info *exceptionType;
+ void (*exceptionDestructor)(void *);
+ std::unexpected_handler unexpectedHandler;
+ std::terminate_handler terminateHandler;
+
+ __cxa_exception *nextException;
+
+ int handlerCount;
+
+#if defined(_LIBCXXABI_ARM_EHABI)
+ __cxa_exception* nextPropagatingException;
+ int propagationCount;
+#else
+ int handlerSwitchValue;
+ const unsigned char *actionRecord;
+ const unsigned char *languageSpecificData;
+ void *catchTemp;
+ void *adjustedPtr;
+#endif
+
+#if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI)
+ // This is a new field to support C++ 0x exception_ptr.
+ // For binary compatibility it is placed where the compiler
+ // previously adding padded to 64-bit align unwindHeader.
+ size_t referenceCount;
+#endif
+ _Unwind_Exception unwindHeader;
+};
+
+// http://sourcery.mentor.com/archives/cxx-abi-dev/msg01924.html
+// The layout of this structure MUST match the layout of __cxa_exception, with
+// primaryException instead of referenceCount.
+struct _LIBCXXABI_HIDDEN __cxa_dependent_exception {
+#if defined(__LP64__) || defined(_LIBCXXABI_ARM_EHABI)
+ void* primaryException;
+#endif
+
+ std::type_info *exceptionType;
+ void (*exceptionDestructor)(void *);
+ std::unexpected_handler unexpectedHandler;
+ std::terminate_handler terminateHandler;
+
+ __cxa_exception *nextException;
+
+ int handlerCount;
+
+#if defined(_LIBCXXABI_ARM_EHABI)
+ __cxa_exception* nextPropagatingException;
+ int propagationCount;
+#else
+ int handlerSwitchValue;
+ const unsigned char *actionRecord;
+ const unsigned char *languageSpecificData;
+ void * catchTemp;
+ void *adjustedPtr;
+#endif
+
+#if !defined(__LP64__) && !defined(_LIBCXXABI_ARM_EHABI)
+ void* primaryException;
+#endif
+ _Unwind_Exception unwindHeader;
+};
+
+struct _LIBCXXABI_HIDDEN __cxa_eh_globals {
+ __cxa_exception * caughtExceptions;
+ unsigned int uncaughtExceptions;
+#if defined(_LIBCXXABI_ARM_EHABI)
+ __cxa_exception* propagatingExceptions;
+#endif
+};
+
+extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals ();
+extern "C" _LIBCXXABI_FUNC_VIS __cxa_eh_globals * __cxa_get_globals_fast ();
+
+extern "C" _LIBCXXABI_FUNC_VIS void * __cxa_allocate_dependent_exception ();
+extern "C" _LIBCXXABI_FUNC_VIS void __cxa_free_dependent_exception (void * dependent_exception);
+
+} // namespace __cxxabiv1
+
+#endif // _CXA_EXCEPTION_H
Index: contrib/libcxxabi/src/cxa_exception.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_exception.cpp
@@ -0,0 +1,756 @@
+//===------------------------- cxa_exception.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Exception Handling APIs"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html
+//
+//===----------------------------------------------------------------------===//
+
+#include "cxxabi.h"
+
+#include <exception> // for std::terminate
+#include <cstring> // for memset
+#include "cxa_exception.hpp"
+#include "cxa_handlers.hpp"
+#include "fallback_malloc.h"
+#include "include/atomic_support.h"
+
+#if __has_feature(address_sanitizer)
+extern "C" void __asan_handle_no_return(void);
+#endif
+
+// +---------------------------+-----------------------------+---------------+
+// | __cxa_exception | _Unwind_Exception CLNGC++\0 | thrown object |
+// +---------------------------+-----------------------------+---------------+
+// ^
+// |
+// +-------------------------------------------------------+
+// |
+// +---------------------------+-----------------------------+
+// | __cxa_dependent_exception | _Unwind_Exception CLNGC++\1 |
+// +---------------------------+-----------------------------+
+
+namespace __cxxabiv1 {
+
+// Utility routines
+static
+inline
+__cxa_exception*
+cxa_exception_from_thrown_object(void* thrown_object)
+{
+ return static_cast<__cxa_exception*>(thrown_object) - 1;
+}
+
+// Note: This is never called when exception_header is masquerading as a
+// __cxa_dependent_exception.
+static
+inline
+void*
+thrown_object_from_cxa_exception(__cxa_exception* exception_header)
+{
+ return static_cast<void*>(exception_header + 1);
+}
+
+// Get the exception object from the unwind pointer.
+// Relies on the structure layout, where the unwind pointer is right in
+// front of the user's exception object
+static
+inline
+__cxa_exception*
+cxa_exception_from_exception_unwind_exception(_Unwind_Exception* unwind_exception)
+{
+ return cxa_exception_from_thrown_object(unwind_exception + 1 );
+}
+
+// Round s up to next multiple of a.
+static inline
+size_t aligned_allocation_size(size_t s, size_t a) {
+ return (s + a - 1) & ~(a - 1);
+}
+
+static inline
+size_t cxa_exception_size_from_exception_thrown_size(size_t size) {
+ return aligned_allocation_size(size + sizeof (__cxa_exception),
+ alignof(__cxa_exception));
+}
+
+void __setExceptionClass(_Unwind_Exception* unwind_exception, uint64_t newValue) {
+ ::memcpy(&unwind_exception->exception_class, &newValue, sizeof(newValue));
+ }
+
+
+static void setOurExceptionClass(_Unwind_Exception* unwind_exception) {
+ __setExceptionClass(unwind_exception, kOurExceptionClass);
+}
+
+static void setDependentExceptionClass(_Unwind_Exception* unwind_exception) {
+ __setExceptionClass(unwind_exception, kOurDependentExceptionClass);
+}
+
+// Is it one of ours?
+uint64_t __getExceptionClass(const _Unwind_Exception* unwind_exception) {
+// On x86 and some ARM unwinders, unwind_exception->exception_class is
+// a uint64_t. On other ARM unwinders, it is a char[8]
+// See: http://infocenter.arm.com/help/topic/com.arm.doc.ihi0038b/IHI0038B_ehabi.pdf
+// So we just copy it into a uint64_t to be sure.
+ uint64_t exClass;
+ ::memcpy(&exClass, &unwind_exception->exception_class, sizeof(exClass));
+ return exClass;
+}
+
+bool __isOurExceptionClass(const _Unwind_Exception* unwind_exception) {
+ return (__getExceptionClass(unwind_exception) & get_vendor_and_language) ==
+ (kOurExceptionClass & get_vendor_and_language);
+}
+
+static bool isDependentException(_Unwind_Exception* unwind_exception) {
+ return (__getExceptionClass(unwind_exception) & 0xFF) == 0x01;
+}
+
+// This does not need to be atomic
+static inline int incrementHandlerCount(__cxa_exception *exception) {
+ return ++exception->handlerCount;
+}
+
+// This does not need to be atomic
+static inline int decrementHandlerCount(__cxa_exception *exception) {
+ return --exception->handlerCount;
+}
+
+/*
+ If reason isn't _URC_FOREIGN_EXCEPTION_CAUGHT, then the terminateHandler
+ stored in exc is called. Otherwise the exceptionDestructor stored in
+ exc is called, and then the memory for the exception is deallocated.
+
+ This is never called for a __cxa_dependent_exception.
+*/
+static
+void
+exception_cleanup_func(_Unwind_Reason_Code reason, _Unwind_Exception* unwind_exception)
+{
+ __cxa_exception* exception_header = cxa_exception_from_exception_unwind_exception(unwind_exception);
+ if (_URC_FOREIGN_EXCEPTION_CAUGHT != reason)
+ std::__terminate(exception_header->terminateHandler);
+ // Just in case there exists a dependent exception that is pointing to this,
+ // check the reference count and only destroy this if that count goes to zero.
+ __cxa_decrement_exception_refcount(unwind_exception + 1);
+}
+
+static _LIBCXXABI_NORETURN void failed_throw(__cxa_exception* exception_header) {
+// Section 2.5.3 says:
+// * For purposes of this ABI, several things are considered exception handlers:
+// ** A terminate() call due to a throw.
+// and
+// * Upon entry, Following initialization of the catch parameter,
+// a handler must call:
+// * void *__cxa_begin_catch(void *exceptionObject );
+ (void) __cxa_begin_catch(&exception_header->unwindHeader);
+ std::__terminate(exception_header->terminateHandler);
+}
+
+// Return the offset of the __cxa_exception header from the start of the
+// allocated buffer. If __cxa_exception's alignment is smaller than the maximum
+// useful alignment for the target machine, padding has to be inserted before
+// the header to ensure the thrown object that follows the header is
+// sufficiently aligned. This happens if _Unwind_exception isn't double-word
+// aligned (on Darwin, for example).
+static size_t get_cxa_exception_offset() {
+ struct S {
+ } __attribute__((aligned));
+
+ // Compute the maximum alignment for the target machine.
+ constexpr size_t alignment = std::alignment_of<S>::value;
+ constexpr size_t excp_size = sizeof(__cxa_exception);
+ constexpr size_t aligned_size =
+ (excp_size + alignment - 1) / alignment * alignment;
+ constexpr size_t offset = aligned_size - excp_size;
+ static_assert((offset == 0 ||
+ std::alignment_of<_Unwind_Exception>::value < alignment),
+ "offset is non-zero only if _Unwind_Exception isn't aligned");
+ return offset;
+}
+
+extern "C" {
+
+// Allocate a __cxa_exception object, and zero-fill it.
+// Reserve "thrown_size" bytes on the end for the user's exception
+// object. Zero-fill the object. If memory can't be allocated, call
+// std::terminate. Return a pointer to the memory to be used for the
+// user's exception object.
+void *__cxa_allocate_exception(size_t thrown_size) throw() {
+ size_t actual_size = cxa_exception_size_from_exception_thrown_size(thrown_size);
+
+ // Allocate extra space before the __cxa_exception header to ensure the
+ // start of the thrown object is sufficiently aligned.
+ size_t header_offset = get_cxa_exception_offset();
+ char *raw_buffer =
+ (char *)__aligned_malloc_with_fallback(header_offset + actual_size);
+ if (NULL == raw_buffer)
+ std::terminate();
+ __cxa_exception *exception_header =
+ static_cast<__cxa_exception *>((void *)(raw_buffer + header_offset));
+ std::memset(exception_header, 0, actual_size);
+ return thrown_object_from_cxa_exception(exception_header);
+}
+
+
+// Free a __cxa_exception object allocated with __cxa_allocate_exception.
+void __cxa_free_exception(void *thrown_object) throw() {
+ // Compute the size of the padding before the header.
+ size_t header_offset = get_cxa_exception_offset();
+ char *raw_buffer =
+ ((char *)cxa_exception_from_thrown_object(thrown_object)) - header_offset;
+ __aligned_free_with_fallback((void *)raw_buffer);
+}
+
+
+// This function shall allocate a __cxa_dependent_exception and
+// return a pointer to it. (Really to the object, not past its' end).
+// Otherwise, it will work like __cxa_allocate_exception.
+void * __cxa_allocate_dependent_exception () {
+ size_t actual_size = sizeof(__cxa_dependent_exception);
+ void *ptr = __aligned_malloc_with_fallback(actual_size);
+ if (NULL == ptr)
+ std::terminate();
+ std::memset(ptr, 0, actual_size);
+ return ptr;
+}
+
+
+// This function shall free a dependent_exception.
+// It does not affect the reference count of the primary exception.
+void __cxa_free_dependent_exception (void * dependent_exception) {
+ __aligned_free_with_fallback(dependent_exception);
+}
+
+
+// 2.4.3 Throwing the Exception Object
+/*
+After constructing the exception object with the throw argument value,
+the generated code calls the __cxa_throw runtime library routine. This
+routine never returns.
+
+The __cxa_throw routine will do the following:
+
+* Obtain the __cxa_exception header from the thrown exception object address,
+which can be computed as follows:
+ __cxa_exception *header = ((__cxa_exception *) thrown_exception - 1);
+* Save the current unexpected_handler and terminate_handler in the __cxa_exception header.
+* Save the tinfo and dest arguments in the __cxa_exception header.
+* Set the exception_class field in the unwind header. This is a 64-bit value
+representing the ASCII string "XXXXC++\0", where "XXXX" is a
+vendor-dependent string. That is, for implementations conforming to this
+ABI, the low-order 4 bytes of this 64-bit value will be "C++\0".
+* Increment the uncaught_exception flag.
+* Call _Unwind_RaiseException in the system unwind library, Its argument is the
+pointer to the thrown exception, which __cxa_throw itself received as an argument.
+__Unwind_RaiseException begins the process of stack unwinding, described
+in Section 2.5. In special cases, such as an inability to find a
+handler, _Unwind_RaiseException may return. In that case, __cxa_throw
+will call terminate, assuming that there was no handler for the
+exception.
+*/
+void
+__cxa_throw(void *thrown_object, std::type_info *tinfo, void (*dest)(void *)) {
+ __cxa_eh_globals *globals = __cxa_get_globals();
+ __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object);
+
+ exception_header->unexpectedHandler = std::get_unexpected();
+ exception_header->terminateHandler = std::get_terminate();
+ exception_header->exceptionType = tinfo;
+ exception_header->exceptionDestructor = dest;
+ setOurExceptionClass(&exception_header->unwindHeader);
+ exception_header->referenceCount = 1; // This is a newly allocated exception, no need for thread safety.
+ globals->uncaughtExceptions += 1; // Not atomically, since globals are thread-local
+
+ exception_header->unwindHeader.exception_cleanup = exception_cleanup_func;
+
+#if __has_feature(address_sanitizer)
+ // Inform the ASan runtime that now might be a good time to clean stuff up.
+ __asan_handle_no_return();
+#endif
+
+#ifdef __USING_SJLJ_EXCEPTIONS__
+ _Unwind_SjLj_RaiseException(&exception_header->unwindHeader);
+#else
+ _Unwind_RaiseException(&exception_header->unwindHeader);
+#endif
+ // This only happens when there is no handler, or some unexpected unwinding
+ // error happens.
+ failed_throw(exception_header);
+}
+
+
+// 2.5.3 Exception Handlers
+/*
+The adjusted pointer is computed by the personality routine during phase 1
+ and saved in the exception header (either __cxa_exception or
+ __cxa_dependent_exception).
+
+ Requires: exception is native
+*/
+void *__cxa_get_exception_ptr(void *unwind_exception) throw() {
+#if defined(_LIBCXXABI_ARM_EHABI)
+ return reinterpret_cast<void*>(
+ static_cast<_Unwind_Control_Block*>(unwind_exception)->barrier_cache.bitpattern[0]);
+#else
+ return cxa_exception_from_exception_unwind_exception(
+ static_cast<_Unwind_Exception*>(unwind_exception))->adjustedPtr;
+#endif
+}
+
+#if defined(_LIBCXXABI_ARM_EHABI)
+/*
+The routine to be called before the cleanup. This will save __cxa_exception in
+__cxa_eh_globals, so that __cxa_end_cleanup() can recover later.
+*/
+bool __cxa_begin_cleanup(void *unwind_arg) throw() {
+ _Unwind_Exception* unwind_exception = static_cast<_Unwind_Exception*>(unwind_arg);
+ __cxa_eh_globals* globals = __cxa_get_globals();
+ __cxa_exception* exception_header =
+ cxa_exception_from_exception_unwind_exception(unwind_exception);
+
+ if (__isOurExceptionClass(unwind_exception))
+ {
+ if (0 == exception_header->propagationCount)
+ {
+ exception_header->nextPropagatingException = globals->propagatingExceptions;
+ globals->propagatingExceptions = exception_header;
+ }
+ ++exception_header->propagationCount;
+ }
+ else
+ {
+ // If the propagatingExceptions stack is not empty, since we can't
+ // chain the foreign exception, terminate it.
+ if (NULL != globals->propagatingExceptions)
+ std::terminate();
+ globals->propagatingExceptions = exception_header;
+ }
+ return true;
+}
+
+/*
+The routine to be called after the cleanup has been performed. It will get the
+propagating __cxa_exception from __cxa_eh_globals, and continue the stack
+unwinding with _Unwind_Resume.
+
+According to ARM EHABI 8.4.1, __cxa_end_cleanup() should not clobber any
+register, thus we have to write this function in assembly so that we can save
+{r1, r2, r3}. We don't have to save r0 because it is the return value and the
+first argument to _Unwind_Resume(). In addition, we are saving r4 in order to
+align the stack to 16 bytes, even though it is a callee-save register.
+*/
+__attribute__((used)) static _Unwind_Exception *
+__cxa_end_cleanup_impl()
+{
+ __cxa_eh_globals* globals = __cxa_get_globals();
+ __cxa_exception* exception_header = globals->propagatingExceptions;
+ if (NULL == exception_header)
+ {
+ // It seems that __cxa_begin_cleanup() is not called properly.
+ // We have no choice but terminate the program now.
+ std::terminate();
+ }
+
+ if (__isOurExceptionClass(&exception_header->unwindHeader))
+ {
+ --exception_header->propagationCount;
+ if (0 == exception_header->propagationCount)
+ {
+ globals->propagatingExceptions = exception_header->nextPropagatingException;
+ exception_header->nextPropagatingException = NULL;
+ }
+ }
+ else
+ {
+ globals->propagatingExceptions = NULL;
+ }
+ return &exception_header->unwindHeader;
+}
+
+asm (
+ " .pushsection .text.__cxa_end_cleanup,\"ax\",%progbits\n"
+ " .globl __cxa_end_cleanup\n"
+ " .type __cxa_end_cleanup,%function\n"
+ "__cxa_end_cleanup:\n"
+ " push {r1, r2, r3, r4}\n"
+ " bl __cxa_end_cleanup_impl\n"
+ " pop {r1, r2, r3, r4}\n"
+ " bl _Unwind_Resume\n"
+ " bl abort\n"
+ " .popsection"
+);
+#endif // defined(_LIBCXXABI_ARM_EHABI)
+
+/*
+This routine can catch foreign or native exceptions. If native, the exception
+can be a primary or dependent variety. This routine may remain blissfully
+ignorant of whether the native exception is primary or dependent.
+
+If the exception is native:
+* Increment's the exception's handler count.
+* Push the exception on the stack of currently-caught exceptions if it is not
+ already there (from a rethrow).
+* Decrements the uncaught_exception count.
+* Returns the adjusted pointer to the exception object, which is stored in
+ the __cxa_exception by the personality routine.
+
+If the exception is foreign, this means it did not originate from one of throw
+routines. The foreign exception does not necessarily have a __cxa_exception
+header. However we can catch it here with a catch (...), or with a call
+to terminate or unexpected during unwinding.
+* Do not try to increment the exception's handler count, we don't know where
+ it is.
+* Push the exception on the stack of currently-caught exceptions only if the
+ stack is empty. The foreign exception has no way to link to the current
+ top of stack. If the stack is not empty, call terminate. Even with an
+ empty stack, this is hacked in by pushing a pointer to an imaginary
+ __cxa_exception block in front of the foreign exception. It would be better
+ if the __cxa_eh_globals structure had a stack of _Unwind_Exception, but it
+ doesn't. It has a stack of __cxa_exception (which has a next* in it).
+* Do not decrement the uncaught_exception count because we didn't increment it
+ in __cxa_throw (or one of our rethrow functions).
+* If we haven't terminated, assume the exception object is just past the
+ _Unwind_Exception and return a pointer to that.
+*/
+void*
+__cxa_begin_catch(void* unwind_arg) throw()
+{
+ _Unwind_Exception* unwind_exception = static_cast<_Unwind_Exception*>(unwind_arg);
+ bool native_exception = __isOurExceptionClass(unwind_exception);
+ __cxa_eh_globals* globals = __cxa_get_globals();
+ // exception_header is a hackish offset from a foreign exception, but it
+ // works as long as we're careful not to try to access any __cxa_exception
+ // parts.
+ __cxa_exception* exception_header =
+ cxa_exception_from_exception_unwind_exception
+ (
+ static_cast<_Unwind_Exception*>(unwind_exception)
+ );
+ if (native_exception)
+ {
+ // Increment the handler count, removing the flag about being rethrown
+ exception_header->handlerCount = exception_header->handlerCount < 0 ?
+ -exception_header->handlerCount + 1 : exception_header->handlerCount + 1;
+ // place the exception on the top of the stack if it's not already
+ // there by a previous rethrow
+ if (exception_header != globals->caughtExceptions)
+ {
+ exception_header->nextException = globals->caughtExceptions;
+ globals->caughtExceptions = exception_header;
+ }
+ globals->uncaughtExceptions -= 1; // Not atomically, since globals are thread-local
+#if defined(_LIBCXXABI_ARM_EHABI)
+ return reinterpret_cast<void*>(exception_header->unwindHeader.barrier_cache.bitpattern[0]);
+#else
+ return exception_header->adjustedPtr;
+#endif
+ }
+ // Else this is a foreign exception
+ // If the caughtExceptions stack is not empty, terminate
+ if (globals->caughtExceptions != 0)
+ std::terminate();
+ // Push the foreign exception on to the stack
+ globals->caughtExceptions = exception_header;
+ return unwind_exception + 1;
+}
+
+
+/*
+Upon exit for any reason, a handler must call:
+ void __cxa_end_catch ();
+
+This routine can be called for either a native or foreign exception.
+For a native exception:
+* Locates the most recently caught exception and decrements its handler count.
+* Removes the exception from the caught exception stack, if the handler count goes to zero.
+* If the handler count goes down to zero, and the exception was not re-thrown
+ by throw, it locates the primary exception (which may be the same as the one
+ it's handling) and decrements its reference count. If that reference count
+ goes to zero, the function destroys the exception. In any case, if the current
+ exception is a dependent exception, it destroys that.
+
+For a foreign exception:
+* If it has been rethrown, there is nothing to do.
+* Otherwise delete the exception and pop the catch stack to empty.
+*/
+void __cxa_end_catch() {
+ static_assert(sizeof(__cxa_exception) == sizeof(__cxa_dependent_exception),
+ "sizeof(__cxa_exception) must be equal to "
+ "sizeof(__cxa_dependent_exception)");
+ static_assert(__builtin_offsetof(__cxa_exception, referenceCount) ==
+ __builtin_offsetof(__cxa_dependent_exception,
+ primaryException),
+ "the layout of __cxa_exception must match the layout of "
+ "__cxa_dependent_exception");
+ static_assert(__builtin_offsetof(__cxa_exception, handlerCount) ==
+ __builtin_offsetof(__cxa_dependent_exception, handlerCount),
+ "the layout of __cxa_exception must match the layout of "
+ "__cxa_dependent_exception");
+ __cxa_eh_globals* globals = __cxa_get_globals_fast(); // __cxa_get_globals called in __cxa_begin_catch
+ __cxa_exception* exception_header = globals->caughtExceptions;
+ // If we've rethrown a foreign exception, then globals->caughtExceptions
+ // will have been made an empty stack by __cxa_rethrow() and there is
+ // nothing more to be done. Do nothing!
+ if (NULL != exception_header)
+ {
+ bool native_exception = __isOurExceptionClass(&exception_header->unwindHeader);
+ if (native_exception)
+ {
+ // This is a native exception
+ if (exception_header->handlerCount < 0)
+ {
+ // The exception has been rethrown by __cxa_rethrow, so don't delete it
+ if (0 == incrementHandlerCount(exception_header))
+ {
+ // Remove from the chain of uncaught exceptions
+ globals->caughtExceptions = exception_header->nextException;
+ // but don't destroy
+ }
+ // Keep handlerCount negative in case there are nested catch's
+ // that need to be told that this exception is rethrown. Don't
+ // erase this rethrow flag until the exception is recaught.
+ }
+ else
+ {
+ // The native exception has not been rethrown
+ if (0 == decrementHandlerCount(exception_header))
+ {
+ // Remove from the chain of uncaught exceptions
+ globals->caughtExceptions = exception_header->nextException;
+ // Destroy this exception, being careful to distinguish
+ // between dependent and primary exceptions
+ if (isDependentException(&exception_header->unwindHeader))
+ {
+ // Reset exception_header to primaryException and deallocate the dependent exception
+ __cxa_dependent_exception* dep_exception_header =
+ reinterpret_cast<__cxa_dependent_exception*>(exception_header);
+ exception_header =
+ cxa_exception_from_thrown_object(dep_exception_header->primaryException);
+ __cxa_free_dependent_exception(dep_exception_header);
+ }
+ // Destroy the primary exception only if its referenceCount goes to 0
+ // (this decrement must be atomic)
+ __cxa_decrement_exception_refcount(thrown_object_from_cxa_exception(exception_header));
+ }
+ }
+ }
+ else
+ {
+ // The foreign exception has not been rethrown. Pop the stack
+ // and delete it. If there are nested catch's and they try
+ // to touch a foreign exception in any way, that is undefined
+ // behavior. They likely can't since the only way to catch
+ // a foreign exception is with catch (...)!
+ _Unwind_DeleteException(&globals->caughtExceptions->unwindHeader);
+ globals->caughtExceptions = 0;
+ }
+ }
+}
+
+// Note: exception_header may be masquerading as a __cxa_dependent_exception
+// and that's ok. exceptionType is there too.
+// However watch out for foreign exceptions. Return null for them.
+std::type_info *__cxa_current_exception_type() {
+// get the current exception
+ __cxa_eh_globals *globals = __cxa_get_globals_fast();
+ if (NULL == globals)
+ return NULL; // If there have never been any exceptions, there are none now.
+ __cxa_exception *exception_header = globals->caughtExceptions;
+ if (NULL == exception_header)
+ return NULL; // No current exception
+ if (!__isOurExceptionClass(&exception_header->unwindHeader))
+ return NULL;
+ return exception_header->exceptionType;
+}
+
+// 2.5.4 Rethrowing Exceptions
+/* This routine can rethrow native or foreign exceptions.
+If the exception is native:
+* marks the exception object on top of the caughtExceptions stack
+ (in an implementation-defined way) as being rethrown.
+* If the caughtExceptions stack is empty, it calls terminate()
+ (see [C++FDIS] [except.throw], 15.1.8).
+* It then calls _Unwind_RaiseException which should not return
+ (terminate if it does).
+ Note: exception_header may be masquerading as a __cxa_dependent_exception
+ and that's ok.
+*/
+void __cxa_rethrow() {
+ __cxa_eh_globals* globals = __cxa_get_globals();
+ __cxa_exception* exception_header = globals->caughtExceptions;
+ if (NULL == exception_header)
+ std::terminate(); // throw; called outside of a exception handler
+ bool native_exception = __isOurExceptionClass(&exception_header->unwindHeader);
+ if (native_exception)
+ {
+ // Mark the exception as being rethrown (reverse the effects of __cxa_begin_catch)
+ exception_header->handlerCount = -exception_header->handlerCount;
+ globals->uncaughtExceptions += 1;
+ // __cxa_end_catch will remove this exception from the caughtExceptions stack if necessary
+ }
+ else // this is a foreign exception
+ {
+ // The only way to communicate to __cxa_end_catch that we've rethrown
+ // a foreign exception, so don't delete us, is to pop the stack here
+ // which must be empty afterwards. Then __cxa_end_catch will do
+ // nothing
+ globals->caughtExceptions = 0;
+ }
+#ifdef __USING_SJLJ_EXCEPTIONS__
+ _Unwind_SjLj_RaiseException(&exception_header->unwindHeader);
+#else
+ _Unwind_RaiseException(&exception_header->unwindHeader);
+#endif
+
+ // If we get here, some kind of unwinding error has occurred.
+ // There is some weird code generation bug happening with
+ // Apple clang version 4.0 (tags/Apple/clang-418.0.2) (based on LLVM 3.1svn)
+ // If we call failed_throw here. Turns up with -O2 or higher, and -Os.
+ __cxa_begin_catch(&exception_header->unwindHeader);
+ if (native_exception)
+ std::__terminate(exception_header->terminateHandler);
+ // Foreign exception: can't get exception_header->terminateHandler
+ std::terminate();
+}
+
+/*
+ If thrown_object is not null, atomically increment the referenceCount field
+ of the __cxa_exception header associated with the thrown object referred to
+ by thrown_object.
+
+ Requires: If thrown_object is not NULL, it is a native exception.
+*/
+void
+__cxa_increment_exception_refcount(void *thrown_object) throw() {
+ if (thrown_object != NULL )
+ {
+ __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object);
+ std::__libcpp_atomic_add(&exception_header->referenceCount, size_t(1));
+ }
+}
+
+/*
+ If thrown_object is not null, atomically decrement the referenceCount field
+ of the __cxa_exception header associated with the thrown object referred to
+ by thrown_object. If the referenceCount drops to zero, destroy and
+ deallocate the exception.
+
+ Requires: If thrown_object is not NULL, it is a native exception.
+*/
+_LIBCXXABI_NO_CFI
+void __cxa_decrement_exception_refcount(void *thrown_object) throw() {
+ if (thrown_object != NULL )
+ {
+ __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object);
+ if (std::__libcpp_atomic_add(&exception_header->referenceCount, size_t(-1)) == 0)
+ {
+ if (NULL != exception_header->exceptionDestructor)
+ exception_header->exceptionDestructor(thrown_object);
+ __cxa_free_exception(thrown_object);
+ }
+ }
+}
+
+/*
+ Returns a pointer to the thrown object (if any) at the top of the
+ caughtExceptions stack. Atomically increment the exception's referenceCount.
+ If there is no such thrown object or if the thrown object is foreign,
+ returns null.
+
+ We can use __cxa_get_globals_fast here to get the globals because if there have
+ been no exceptions thrown, ever, on this thread, we can return NULL without
+ the need to allocate the exception-handling globals.
+*/
+void *__cxa_current_primary_exception() throw() {
+// get the current exception
+ __cxa_eh_globals* globals = __cxa_get_globals_fast();
+ if (NULL == globals)
+ return NULL; // If there are no globals, there is no exception
+ __cxa_exception* exception_header = globals->caughtExceptions;
+ if (NULL == exception_header)
+ return NULL; // No current exception
+ if (!__isOurExceptionClass(&exception_header->unwindHeader))
+ return NULL; // Can't capture a foreign exception (no way to refcount it)
+ if (isDependentException(&exception_header->unwindHeader)) {
+ __cxa_dependent_exception* dep_exception_header =
+ reinterpret_cast<__cxa_dependent_exception*>(exception_header);
+ exception_header = cxa_exception_from_thrown_object(dep_exception_header->primaryException);
+ }
+ void* thrown_object = thrown_object_from_cxa_exception(exception_header);
+ __cxa_increment_exception_refcount(thrown_object);
+ return thrown_object;
+}
+
+/*
+ If reason isn't _URC_FOREIGN_EXCEPTION_CAUGHT, then the terminateHandler
+ stored in exc is called. Otherwise the referenceCount stored in the
+ primary exception is decremented, destroying the primary if necessary.
+ Finally the dependent exception is destroyed.
+*/
+static
+void
+dependent_exception_cleanup(_Unwind_Reason_Code reason, _Unwind_Exception* unwind_exception)
+{
+ __cxa_dependent_exception* dep_exception_header =
+ reinterpret_cast<__cxa_dependent_exception*>(unwind_exception + 1) - 1;
+ if (_URC_FOREIGN_EXCEPTION_CAUGHT != reason)
+ std::__terminate(dep_exception_header->terminateHandler);
+ __cxa_decrement_exception_refcount(dep_exception_header->primaryException);
+ __cxa_free_dependent_exception(dep_exception_header);
+}
+
+/*
+ If thrown_object is not null, allocate, initialize and throw a dependent
+ exception.
+*/
+void
+__cxa_rethrow_primary_exception(void* thrown_object)
+{
+ if ( thrown_object != NULL )
+ {
+ // thrown_object guaranteed to be native because
+ // __cxa_current_primary_exception returns NULL for foreign exceptions
+ __cxa_exception* exception_header = cxa_exception_from_thrown_object(thrown_object);
+ __cxa_dependent_exception* dep_exception_header =
+ static_cast<__cxa_dependent_exception*>(__cxa_allocate_dependent_exception());
+ dep_exception_header->primaryException = thrown_object;
+ __cxa_increment_exception_refcount(thrown_object);
+ dep_exception_header->exceptionType = exception_header->exceptionType;
+ dep_exception_header->unexpectedHandler = std::get_unexpected();
+ dep_exception_header->terminateHandler = std::get_terminate();
+ setDependentExceptionClass(&dep_exception_header->unwindHeader);
+ __cxa_get_globals()->uncaughtExceptions += 1;
+ dep_exception_header->unwindHeader.exception_cleanup = dependent_exception_cleanup;
+#ifdef __USING_SJLJ_EXCEPTIONS__
+ _Unwind_SjLj_RaiseException(&dep_exception_header->unwindHeader);
+#else
+ _Unwind_RaiseException(&dep_exception_header->unwindHeader);
+#endif
+ // Some sort of unwinding error. Note that terminate is a handler.
+ __cxa_begin_catch(&dep_exception_header->unwindHeader);
+ }
+ // If we return client will call terminate()
+}
+
+bool
+__cxa_uncaught_exception() throw() { return __cxa_uncaught_exceptions() != 0; }
+
+unsigned int
+__cxa_uncaught_exceptions() throw()
+{
+ // This does not report foreign exceptions in flight
+ __cxa_eh_globals* globals = __cxa_get_globals_fast();
+ if (globals == 0)
+ return 0;
+ return globals->uncaughtExceptions;
+}
+
+} // extern "C"
+
+} // abi
Index: contrib/libcxxabi/src/cxa_exception_storage.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_exception_storage.cpp
@@ -0,0 +1,101 @@
+//===--------------------- cxa_exception_storage.cpp ----------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the storage for the "Caught Exception Stack"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html (section 2.2.2)
+//
+//===----------------------------------------------------------------------===//
+
+#include "cxa_exception.hpp"
+
+#include <__threading_support>
+
+#if defined(_LIBCXXABI_HAS_NO_THREADS)
+
+namespace __cxxabiv1 {
+extern "C" {
+ static __cxa_eh_globals eh_globals;
+ __cxa_eh_globals *__cxa_get_globals() { return &eh_globals; }
+ __cxa_eh_globals *__cxa_get_globals_fast() { return &eh_globals; }
+ }
+}
+
+#elif defined(HAS_THREAD_LOCAL)
+
+namespace __cxxabiv1 {
+
+namespace {
+ __cxa_eh_globals * __globals () {
+ static thread_local __cxa_eh_globals eh_globals;
+ return &eh_globals;
+ }
+ }
+
+extern "C" {
+ __cxa_eh_globals * __cxa_get_globals () { return __globals (); }
+ __cxa_eh_globals * __cxa_get_globals_fast () { return __globals (); }
+ }
+}
+
+#else
+
+#include "abort_message.h"
+#include "fallback_malloc.h"
+
+// In general, we treat all threading errors as fatal.
+// We cannot call std::terminate() because that will in turn
+// call __cxa_get_globals() and cause infinite recursion.
+
+namespace __cxxabiv1 {
+namespace {
+ std::__libcpp_tls_key key_;
+ std::__libcpp_exec_once_flag flag_ = _LIBCPP_EXEC_ONCE_INITIALIZER;
+
+ void _LIBCPP_TLS_DESTRUCTOR_CC destruct_ (void *p) {
+ __free_with_fallback ( p );
+ if ( 0 != std::__libcpp_tls_set ( key_, NULL ) )
+ abort_message("cannot zero out thread value for __cxa_get_globals()");
+ }
+
+ void construct_ () {
+ if ( 0 != std::__libcpp_tls_create ( &key_, destruct_ ) )
+ abort_message("cannot create thread specific key for __cxa_get_globals()");
+ }
+}
+
+extern "C" {
+ __cxa_eh_globals * __cxa_get_globals () {
+ // Try to get the globals for this thread
+ __cxa_eh_globals* retVal = __cxa_get_globals_fast ();
+
+ // If this is the first time we've been asked for these globals, create them
+ if ( NULL == retVal ) {
+ retVal = static_cast<__cxa_eh_globals*>
+ (__calloc_with_fallback (1, sizeof (__cxa_eh_globals)));
+ if ( NULL == retVal )
+ abort_message("cannot allocate __cxa_eh_globals");
+ if ( 0 != std::__libcpp_tls_set ( key_, retVal ) )
+ abort_message("std::__libcpp_tls_set failure in __cxa_get_globals()");
+ }
+ return retVal;
+ }
+
+ // Note that this implementation will reliably return NULL if not
+ // preceded by a call to __cxa_get_globals(). This is an extension
+ // to the Itanium ABI and is taken advantage of in several places in
+ // libc++abi.
+ __cxa_eh_globals * __cxa_get_globals_fast () {
+ // First time through, create the key.
+ if (0 != std::__libcpp_execute_once(&flag_, construct_))
+ abort_message("execute once failure in __cxa_get_globals_fast()");
+// static int init = construct_();
+ return static_cast<__cxa_eh_globals*>(std::__libcpp_tls_get(key_));
+ }
+
+}
+}
+#endif
Index: contrib/libcxxabi/src/cxa_guard.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_guard.cpp
@@ -0,0 +1,264 @@
+//===---------------------------- cxa_guard.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "__cxxabi_config.h"
+
+#include "abort_message.h"
+#include <__threading_support>
+
+#include <stdint.h>
+
+/*
+ This implementation must be careful to not call code external to this file
+ which will turn around and try to call __cxa_guard_acquire reentrantly.
+ For this reason, the headers of this file are as restricted as possible.
+ Previous implementations of this code for __APPLE__ have used
+ std::__libcpp_mutex_lock and the abort_message utility without problem. This
+ implementation also uses std::__libcpp_condvar_wait which has tested
+ to not be a problem.
+*/
+
+namespace __cxxabiv1
+{
+
+namespace
+{
+
+#ifdef __arm__
+// A 32-bit, 4-byte-aligned static data value. The least significant 2 bits must
+// be statically initialized to 0.
+typedef uint32_t guard_type;
+
+inline void set_initialized(guard_type* guard_object) {
+ *guard_object |= 1;
+}
+#else
+typedef uint64_t guard_type;
+
+void set_initialized(guard_type* guard_object) {
+ char* initialized = (char*)guard_object;
+ *initialized = 1;
+}
+#endif
+
+#if defined(_LIBCXXABI_HAS_NO_THREADS) || (defined(__APPLE__) && !defined(__arm__))
+#ifdef __arm__
+
+// Test the lowest bit.
+inline bool is_initialized(guard_type* guard_object) {
+ return (*guard_object) & 1;
+}
+
+#else
+
+bool is_initialized(guard_type* guard_object) {
+ char* initialized = (char*)guard_object;
+ return *initialized;
+}
+
+#endif
+#endif
+
+#ifndef _LIBCXXABI_HAS_NO_THREADS
+std::__libcpp_mutex_t guard_mut = _LIBCPP_MUTEX_INITIALIZER;
+std::__libcpp_condvar_t guard_cv = _LIBCPP_CONDVAR_INITIALIZER;
+#endif
+
+#if defined(__APPLE__) && !defined(__arm__)
+
+typedef uint32_t lock_type;
+
+#if __LITTLE_ENDIAN__
+
+inline
+lock_type
+get_lock(uint64_t x)
+{
+ return static_cast<lock_type>(x >> 32);
+}
+
+inline
+void
+set_lock(uint64_t& x, lock_type y)
+{
+ x = static_cast<uint64_t>(y) << 32;
+}
+
+#else // __LITTLE_ENDIAN__
+
+inline
+lock_type
+get_lock(uint64_t x)
+{
+ return static_cast<lock_type>(x);
+}
+
+inline
+void
+set_lock(uint64_t& x, lock_type y)
+{
+ x = y;
+}
+
+#endif // __LITTLE_ENDIAN__
+
+#else // !__APPLE__ || __arm__
+
+typedef bool lock_type;
+
+#if !defined(__arm__)
+static_assert(std::is_same<guard_type, uint64_t>::value, "");
+
+inline lock_type get_lock(uint64_t x)
+{
+ union
+ {
+ uint64_t guard;
+ uint8_t lock[2];
+ } f = {x};
+ return f.lock[1] != 0;
+}
+
+inline void set_lock(uint64_t& x, lock_type y)
+{
+ union
+ {
+ uint64_t guard;
+ uint8_t lock[2];
+ } f = {0};
+ f.lock[1] = y;
+ x = f.guard;
+}
+#else // defined(__arm__)
+static_assert(std::is_same<guard_type, uint32_t>::value, "");
+
+inline lock_type get_lock(uint32_t x)
+{
+ union
+ {
+ uint32_t guard;
+ uint8_t lock[2];
+ } f = {x};
+ return f.lock[1] != 0;
+}
+
+inline void set_lock(uint32_t& x, lock_type y)
+{
+ union
+ {
+ uint32_t guard;
+ uint8_t lock[2];
+ } f = {0};
+ f.lock[1] = y;
+ x = f.guard;
+}
+
+#endif // !defined(__arm__)
+
+#endif // __APPLE__ && !__arm__
+
+} // unnamed namespace
+
+extern "C"
+{
+
+#ifndef _LIBCXXABI_HAS_NO_THREADS
+_LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(guard_type *guard_object) {
+ char* initialized = (char*)guard_object;
+ if (std::__libcpp_mutex_lock(&guard_mut))
+ abort_message("__cxa_guard_acquire failed to acquire mutex");
+ int result = *initialized == 0;
+ if (result)
+ {
+#if defined(__APPLE__) && !defined(__arm__)
+ // This is a special-case pthread dependency for Mac. We can't pull this
+ // out into libcxx's threading API (__threading_support) because not all
+ // supported Mac environments provide this function (in pthread.h). To
+ // make it possible to build/use libcxx in those environments, we have to
+ // keep this pthread dependency local to libcxxabi. If there is some
+ // convenient way to detect precisely when pthread_mach_thread_np is
+ // available in a given Mac environment, it might still be possible to
+ // bury this dependency in __threading_support.
+ #ifdef _LIBCPP_HAS_THREAD_API_PTHREAD
+ const lock_type id = pthread_mach_thread_np(std::__libcpp_thread_get_current_id());
+ #else
+ #error "How do I pthread_mach_thread_np()?"
+ #endif
+ lock_type lock = get_lock(*guard_object);
+ if (lock)
+ {
+ // if this thread set lock for this same guard_object, abort
+ if (lock == id)
+ abort_message("__cxa_guard_acquire detected deadlock");
+ do
+ {
+ if (std::__libcpp_condvar_wait(&guard_cv, &guard_mut))
+ abort_message("__cxa_guard_acquire condition variable wait failed");
+ lock = get_lock(*guard_object);
+ } while (lock);
+ result = !is_initialized(guard_object);
+ if (result)
+ set_lock(*guard_object, id);
+ }
+ else
+ set_lock(*guard_object, id);
+#else // !__APPLE__ || __arm__
+ while (get_lock(*guard_object))
+ if (std::__libcpp_condvar_wait(&guard_cv, &guard_mut))
+ abort_message("__cxa_guard_acquire condition variable wait failed");
+ result = *initialized == 0;
+ if (result)
+ set_lock(*guard_object, true);
+#endif // !__APPLE__ || __arm__
+ }
+ if (std::__libcpp_mutex_unlock(&guard_mut))
+ abort_message("__cxa_guard_acquire failed to release mutex");
+ return result;
+}
+
+_LIBCXXABI_FUNC_VIS void __cxa_guard_release(guard_type *guard_object) {
+ if (std::__libcpp_mutex_lock(&guard_mut))
+ abort_message("__cxa_guard_release failed to acquire mutex");
+ *guard_object = 0;
+ set_initialized(guard_object);
+ if (std::__libcpp_mutex_unlock(&guard_mut))
+ abort_message("__cxa_guard_release failed to release mutex");
+ if (std::__libcpp_condvar_broadcast(&guard_cv))
+ abort_message("__cxa_guard_release failed to broadcast condition variable");
+}
+
+_LIBCXXABI_FUNC_VIS void __cxa_guard_abort(guard_type *guard_object) {
+ if (std::__libcpp_mutex_lock(&guard_mut))
+ abort_message("__cxa_guard_abort failed to acquire mutex");
+ *guard_object = 0;
+ if (std::__libcpp_mutex_unlock(&guard_mut))
+ abort_message("__cxa_guard_abort failed to release mutex");
+ if (std::__libcpp_condvar_broadcast(&guard_cv))
+ abort_message("__cxa_guard_abort failed to broadcast condition variable");
+}
+
+#else // _LIBCXXABI_HAS_NO_THREADS
+
+_LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(guard_type *guard_object) {
+ return !is_initialized(guard_object);
+}
+
+_LIBCXXABI_FUNC_VIS void __cxa_guard_release(guard_type *guard_object) {
+ *guard_object = 0;
+ set_initialized(guard_object);
+}
+
+_LIBCXXABI_FUNC_VIS void __cxa_guard_abort(guard_type *guard_object) {
+ *guard_object = 0;
+}
+
+#endif // !_LIBCXXABI_HAS_NO_THREADS
+
+} // extern "C"
+
+} // __cxxabiv1
Index: contrib/libcxxabi/src/cxa_handlers.hpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_handlers.hpp
@@ -0,0 +1,55 @@
+//===------------------------- cxa_handlers.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the functionality associated with the terminate_handler,
+// unexpected_handler, and new_handler.
+//===----------------------------------------------------------------------===//
+
+#ifndef _CXA_HANDLERS_H
+#define _CXA_HANDLERS_H
+
+#include <__cxxabi_config.h>
+
+#include <exception>
+
+namespace std
+{
+
+_LIBCXXABI_HIDDEN _LIBCXXABI_NORETURN
+void
+__unexpected(unexpected_handler func);
+
+_LIBCXXABI_HIDDEN _LIBCXXABI_NORETURN
+void
+__terminate(terminate_handler func) _NOEXCEPT;
+
+} // std
+
+extern "C"
+{
+
+_LIBCXXABI_DATA_VIS extern void (*__cxa_terminate_handler)();
+_LIBCXXABI_DATA_VIS extern void (*__cxa_unexpected_handler)();
+_LIBCXXABI_DATA_VIS extern void (*__cxa_new_handler)();
+
+/*
+
+ At some point in the future these three symbols will become
+ C++11 atomic variables:
+
+ extern std::atomic<std::terminate_handler> __cxa_terminate_handler;
+ extern std::atomic<std::unexpected_handler> __cxa_unexpected_handler;
+ extern std::atomic<std::new_handler> __cxa_new_handler;
+
+ This change will not impact their ABI. But it will allow for a
+ portable performance optimization.
+
+*/
+
+} // extern "C"
+
+#endif // _CXA_HANDLERS_H
Index: contrib/libcxxabi/src/cxa_handlers.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_handlers.cpp
@@ -0,0 +1,109 @@
+//===------------------------- cxa_handlers.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the functionality associated with the terminate_handler,
+// unexpected_handler, and new_handler.
+//===----------------------------------------------------------------------===//
+
+#include <stdexcept>
+#include <new>
+#include <exception>
+#include "abort_message.h"
+#include "cxxabi.h"
+#include "cxa_handlers.hpp"
+#include "cxa_exception.hpp"
+#include "private_typeinfo.h"
+#include "include/atomic_support.h"
+
+namespace std
+{
+
+unexpected_handler
+get_unexpected() _NOEXCEPT
+{
+ return __libcpp_atomic_load(&__cxa_unexpected_handler, _AO_Acquire);
+}
+
+void
+__unexpected(unexpected_handler func)
+{
+ func();
+ // unexpected handler should not return
+ abort_message("unexpected_handler unexpectedly returned");
+}
+
+__attribute__((noreturn))
+void
+unexpected()
+{
+ __unexpected(get_unexpected());
+}
+
+terminate_handler
+get_terminate() _NOEXCEPT
+{
+ return __libcpp_atomic_load(&__cxa_terminate_handler, _AO_Acquire);
+}
+
+void
+__terminate(terminate_handler func) _NOEXCEPT
+{
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ try
+ {
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ func();
+ // handler should not return
+ abort_message("terminate_handler unexpectedly returned");
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ // handler should not throw exception
+ abort_message("terminate_handler unexpectedly threw an exception");
+ }
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+}
+
+__attribute__((noreturn))
+void
+terminate() _NOEXCEPT
+{
+ // If there might be an uncaught exception
+ using namespace __cxxabiv1;
+ __cxa_eh_globals* globals = __cxa_get_globals_fast();
+ if (globals)
+ {
+ __cxa_exception* exception_header = globals->caughtExceptions;
+ if (exception_header)
+ {
+ _Unwind_Exception* unwind_exception =
+ reinterpret_cast<_Unwind_Exception*>(exception_header + 1) - 1;
+ if (__isOurExceptionClass(unwind_exception))
+ __terminate(exception_header->terminateHandler);
+ }
+ }
+ __terminate(get_terminate());
+}
+
+extern "C" {
+new_handler __cxa_new_handler = 0;
+}
+
+new_handler
+set_new_handler(new_handler handler) _NOEXCEPT
+{
+ return __libcpp_atomic_exchange(&__cxa_new_handler, handler, _AO_Acq_Rel);
+}
+
+new_handler
+get_new_handler() _NOEXCEPT
+{
+ return __libcpp_atomic_load(&__cxa_new_handler, _AO_Acquire);
+}
+
+} // std
Index: contrib/libcxxabi/src/cxa_noexception.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_noexception.cpp
@@ -0,0 +1,59 @@
+//===------------------------- cxa_exception.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Exception Handling APIs"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html
+//
+//===----------------------------------------------------------------------===//
+
+// Support functions for the no-exceptions libc++ library
+
+#include "cxxabi.h"
+
+#include <exception> // for std::terminate
+#include "cxa_exception.hpp"
+#include "cxa_handlers.hpp"
+
+namespace __cxxabiv1 {
+
+extern "C" {
+
+void
+__cxa_increment_exception_refcount(void *thrown_object) throw() {
+ if (thrown_object != nullptr)
+ std::terminate();
+}
+
+void
+__cxa_decrement_exception_refcount(void *thrown_object) throw() {
+ if (thrown_object != nullptr)
+ std::terminate();
+}
+
+
+void *__cxa_current_primary_exception() throw() { return nullptr; }
+
+void
+__cxa_rethrow_primary_exception(void* thrown_object) {
+ if (thrown_object != nullptr)
+ std::terminate();
+}
+
+bool
+__cxa_uncaught_exception() throw() { return false; }
+
+unsigned int
+__cxa_uncaught_exceptions() throw() { return 0; }
+
+} // extern "C"
+
+// provide dummy implementations for the 'no exceptions' case.
+uint64_t __getExceptionClass (const _Unwind_Exception*) { return 0; }
+void __setExceptionClass ( _Unwind_Exception*, uint64_t) {}
+bool __isOurExceptionClass(const _Unwind_Exception*) { return false; }
+
+} // abi
Index: contrib/libcxxabi/src/cxa_personality.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_personality.cpp
@@ -0,0 +1,1324 @@
+//===------------------------- cxa_exception.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Exception Handling APIs"
+// http://mentorembedded.github.io/cxx-abi/abi-eh.html
+// http://www.intel.com/design/itanium/downloads/245358.htm
+//
+//===----------------------------------------------------------------------===//
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <typeinfo>
+
+#include "__cxxabi_config.h"
+#include "cxa_exception.hpp"
+#include "cxa_handlers.hpp"
+#include "private_typeinfo.h"
+#include "unwind.h"
+
+#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
+#include <windows.h>
+#include <winnt.h>
+
+extern "C" EXCEPTION_DISPOSITION _GCC_specific_handler(PEXCEPTION_RECORD,
+ void *, PCONTEXT,
+ PDISPATCHER_CONTEXT,
+ _Unwind_Personality_Fn);
+#endif
+
+/*
+ Exception Header Layout:
+
++---------------------------+-----------------------------+---------------+
+| __cxa_exception | _Unwind_Exception CLNGC++\0 | thrown object |
++---------------------------+-----------------------------+---------------+
+ ^
+ |
+ +-------------------------------------------------------+
+ |
++---------------------------+-----------------------------+
+| __cxa_dependent_exception | _Unwind_Exception CLNGC++\1 |
++---------------------------+-----------------------------+
+
+ Exception Handling Table Layout:
+
++-----------------+--------+
+| lpStartEncoding | (char) |
++---------+-------+--------+---------------+-----------------------+
+| lpStart | (encoded with lpStartEncoding) | defaults to funcStart |
++---------+-----+--------+-----------------+---------------+-------+
+| ttypeEncoding | (char) | Encoding of the type_info table |
++---------------+-+------+----+----------------------------+----------------+
+| classInfoOffset | (ULEB128) | Offset to type_info table, defaults to null |
++-----------------++--------+-+----------------------------+----------------+
+| callSiteEncoding | (char) | Encoding for Call Site Table |
++------------------+--+-----+-----+------------------------+--------------------------+
+| callSiteTableLength | (ULEB128) | Call Site Table length, used to find Action table |
++---------------------+-----------+---------------------------------------------------+
+#ifndef __USING_SJLJ_EXCEPTIONS__
++---------------------+-----------+------------------------------------------------+
+| Beginning of Call Site Table The current ip lies within the |
+| ... (start, length) range of one of these |
+| call sites. There may be action needed. |
+| +-------------+---------------------------------+------------------------------+ |
+| | start | (encoded with callSiteEncoding) | offset relative to funcStart | |
+| | length | (encoded with callSiteEncoding) | length of code fragment | |
+| | landingPad | (encoded with callSiteEncoding) | offset relative to lpStart | |
+| | actionEntry | (ULEB128) | Action Table Index 1-based | |
+| | | | actionEntry == 0 -> cleanup | |
+| +-------------+---------------------------------+------------------------------+ |
+| ... |
++----------------------------------------------------------------------------------+
+#else // __USING_SJLJ_EXCEPTIONS__
++---------------------+-----------+------------------------------------------------+
+| Beginning of Call Site Table The current ip is a 1-based index into |
+| ... this table. Or it is -1 meaning no |
+| action is needed. Or it is 0 meaning |
+| terminate. |
+| +-------------+---------------------------------+------------------------------+ |
+| | landingPad | (ULEB128) | offset relative to lpStart | |
+| | actionEntry | (ULEB128) | Action Table Index 1-based | |
+| | | | actionEntry == 0 -> cleanup | |
+| +-------------+---------------------------------+------------------------------+ |
+| ... |
++----------------------------------------------------------------------------------+
+#endif // __USING_SJLJ_EXCEPTIONS__
++---------------------------------------------------------------------+
+| Beginning of Action Table ttypeIndex == 0 : cleanup |
+| ... ttypeIndex > 0 : catch |
+| ttypeIndex < 0 : exception spec |
+| +--------------+-----------+--------------------------------------+ |
+| | ttypeIndex | (SLEB128) | Index into type_info Table (1-based) | |
+| | actionOffset | (SLEB128) | Offset into next Action Table entry | |
+| +--------------+-----------+--------------------------------------+ |
+| ... |
++---------------------------------------------------------------------+-----------------+
+| type_info Table, but classInfoOffset does *not* point here! |
+| +----------------+------------------------------------------------+-----------------+ |
+| | Nth type_info* | Encoded with ttypeEncoding, 0 means catch(...) | ttypeIndex == N | |
+| +----------------+------------------------------------------------+-----------------+ |
+| ... |
+| +----------------+------------------------------------------------+-----------------+ |
+| | 1st type_info* | Encoded with ttypeEncoding, 0 means catch(...) | ttypeIndex == 1 | |
+| +----------------+------------------------------------------------+-----------------+ |
+| +---------------------------------------+-----------+------------------------------+ |
+| | 1st ttypeIndex for 1st exception spec | (ULEB128) | classInfoOffset points here! | |
+| | ... | (ULEB128) | | |
+| | Mth ttypeIndex for 1st exception spec | (ULEB128) | | |
+| | 0 | (ULEB128) | | |
+| +---------------------------------------+------------------------------------------+ |
+| ... |
+| +---------------------------------------+------------------------------------------+ |
+| | 0 | (ULEB128) | throw() | |
+| +---------------------------------------+------------------------------------------+ |
+| ... |
+| +---------------------------------------+------------------------------------------+ |
+| | 1st ttypeIndex for Nth exception spec | (ULEB128) | | |
+| | ... | (ULEB128) | | |
+| | Mth ttypeIndex for Nth exception spec | (ULEB128) | | |
+| | 0 | (ULEB128) | | |
+| +---------------------------------------+------------------------------------------+ |
++---------------------------------------------------------------------------------------+
+
+Notes:
+
+* ttypeIndex in the Action Table, and in the exception spec table, is an index,
+ not a byte count, if positive. It is a negative index offset of
+ classInfoOffset and the sizeof entry depends on ttypeEncoding.
+ But if ttypeIndex is negative, it is a positive 1-based byte offset into the
+ type_info Table.
+ And if ttypeIndex is zero, it refers to a catch (...).
+
+* landingPad can be 0, this implies there is nothing to be done.
+
+* landingPad != 0 and actionEntry == 0 implies a cleanup needs to be done
+ @landingPad.
+
+* A cleanup can also be found under landingPad != 0 and actionEntry != 0 in
+ the Action Table with ttypeIndex == 0.
+*/
+
+namespace __cxxabiv1
+{
+
+namespace
+{
+
+template <class AsType>
+uintptr_t readPointerHelper(const uint8_t*& p) {
+ AsType value;
+ memcpy(&value, p, sizeof(AsType));
+ p += sizeof(AsType);
+ return static_cast<uintptr_t>(value);
+}
+
+} // end namespace
+
+extern "C"
+{
+
+// private API
+
+// Heavily borrowed from llvm/examples/ExceptionDemo/ExceptionDemo.cpp
+
+// DWARF Constants
+enum
+{
+ DW_EH_PE_absptr = 0x00,
+ DW_EH_PE_uleb128 = 0x01,
+ DW_EH_PE_udata2 = 0x02,
+ DW_EH_PE_udata4 = 0x03,
+ DW_EH_PE_udata8 = 0x04,
+ DW_EH_PE_sleb128 = 0x09,
+ DW_EH_PE_sdata2 = 0x0A,
+ DW_EH_PE_sdata4 = 0x0B,
+ DW_EH_PE_sdata8 = 0x0C,
+ DW_EH_PE_pcrel = 0x10,
+ DW_EH_PE_textrel = 0x20,
+ DW_EH_PE_datarel = 0x30,
+ DW_EH_PE_funcrel = 0x40,
+ DW_EH_PE_aligned = 0x50,
+ DW_EH_PE_indirect = 0x80,
+ DW_EH_PE_omit = 0xFF
+};
+
+/// Read a uleb128 encoded value and advance pointer
+/// See Variable Length Data Appendix C in:
+/// @link http://dwarfstd.org/Dwarf4.pdf @unlink
+/// @param data reference variable holding memory pointer to decode from
+/// @returns decoded value
+static
+uintptr_t
+readULEB128(const uint8_t** data)
+{
+ uintptr_t result = 0;
+ uintptr_t shift = 0;
+ unsigned char byte;
+ const uint8_t *p = *data;
+ do
+ {
+ byte = *p++;
+ result |= static_cast<uintptr_t>(byte & 0x7F) << shift;
+ shift += 7;
+ } while (byte & 0x80);
+ *data = p;
+ return result;
+}
+
+/// Read a sleb128 encoded value and advance pointer
+/// See Variable Length Data Appendix C in:
+/// @link http://dwarfstd.org/Dwarf4.pdf @unlink
+/// @param data reference variable holding memory pointer to decode from
+/// @returns decoded value
+static
+intptr_t
+readSLEB128(const uint8_t** data)
+{
+ uintptr_t result = 0;
+ uintptr_t shift = 0;
+ unsigned char byte;
+ const uint8_t *p = *data;
+ do
+ {
+ byte = *p++;
+ result |= static_cast<uintptr_t>(byte & 0x7F) << shift;
+ shift += 7;
+ } while (byte & 0x80);
+ *data = p;
+ if ((byte & 0x40) && (shift < (sizeof(result) << 3)))
+ result |= static_cast<uintptr_t>(~0) << shift;
+ return static_cast<intptr_t>(result);
+}
+
+/// Read a pointer encoded value and advance pointer
+/// See Variable Length Data in:
+/// @link http://dwarfstd.org/Dwarf3.pdf @unlink
+/// @param data reference variable holding memory pointer to decode from
+/// @param encoding dwarf encoding type
+/// @returns decoded value
+static
+uintptr_t
+readEncodedPointer(const uint8_t** data, uint8_t encoding)
+{
+ uintptr_t result = 0;
+ if (encoding == DW_EH_PE_omit)
+ return result;
+ const uint8_t* p = *data;
+ // first get value
+ switch (encoding & 0x0F)
+ {
+ case DW_EH_PE_absptr:
+ result = readPointerHelper<uintptr_t>(p);
+ break;
+ case DW_EH_PE_uleb128:
+ result = readULEB128(&p);
+ break;
+ case DW_EH_PE_sleb128:
+ result = static_cast<uintptr_t>(readSLEB128(&p));
+ break;
+ case DW_EH_PE_udata2:
+ result = readPointerHelper<uint16_t>(p);
+ break;
+ case DW_EH_PE_udata4:
+ result = readPointerHelper<uint32_t>(p);
+ break;
+ case DW_EH_PE_udata8:
+ result = readPointerHelper<uint64_t>(p);
+ break;
+ case DW_EH_PE_sdata2:
+ result = readPointerHelper<int16_t>(p);
+ break;
+ case DW_EH_PE_sdata4:
+ result = readPointerHelper<int32_t>(p);
+ break;
+ case DW_EH_PE_sdata8:
+ result = readPointerHelper<int64_t>(p);
+ break;
+ default:
+ // not supported
+ abort();
+ break;
+ }
+ // then add relative offset
+ switch (encoding & 0x70)
+ {
+ case DW_EH_PE_absptr:
+ // do nothing
+ break;
+ case DW_EH_PE_pcrel:
+ if (result)
+ result += (uintptr_t)(*data);
+ break;
+ case DW_EH_PE_textrel:
+ case DW_EH_PE_datarel:
+ case DW_EH_PE_funcrel:
+ case DW_EH_PE_aligned:
+ default:
+ // not supported
+ abort();
+ break;
+ }
+ // then apply indirection
+ if (result && (encoding & DW_EH_PE_indirect))
+ result = *((uintptr_t*)result);
+ *data = p;
+ return result;
+}
+
+static
+void
+call_terminate(bool native_exception, _Unwind_Exception* unwind_exception)
+{
+ __cxa_begin_catch(unwind_exception);
+ if (native_exception)
+ {
+ // Use the stored terminate_handler if possible
+ __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ std::__terminate(exception_header->terminateHandler);
+ }
+ std::terminate();
+}
+
+#if defined(_LIBCXXABI_ARM_EHABI)
+static const void* read_target2_value(const void* ptr)
+{
+ uintptr_t offset = *reinterpret_cast<const uintptr_t*>(ptr);
+ if (!offset)
+ return 0;
+ // "ARM EABI provides a TARGET2 relocation to describe these typeinfo
+ // pointers. The reason being it allows their precise semantics to be
+ // deferred to the linker. For bare-metal they turn into absolute
+ // relocations. For linux they turn into GOT-REL relocations."
+ // https://gcc.gnu.org/ml/gcc-patches/2009-08/msg00264.html
+#if defined(LIBCXXABI_BAREMETAL)
+ return reinterpret_cast<const void*>(reinterpret_cast<uintptr_t>(ptr) +
+ offset);
+#else
+ return *reinterpret_cast<const void **>(reinterpret_cast<uintptr_t>(ptr) +
+ offset);
+#endif
+}
+
+static const __shim_type_info*
+get_shim_type_info(uint64_t ttypeIndex, const uint8_t* classInfo,
+ uint8_t ttypeEncoding, bool native_exception,
+ _Unwind_Exception* unwind_exception)
+{
+ if (classInfo == 0)
+ {
+ // this should not happen. Indicates corrupted eh_table.
+ call_terminate(native_exception, unwind_exception);
+ }
+
+ assert(((ttypeEncoding == DW_EH_PE_absptr) || // LLVM or GCC 4.6
+ (ttypeEncoding == DW_EH_PE_pcrel) || // GCC 4.7 baremetal
+ (ttypeEncoding == (DW_EH_PE_pcrel | DW_EH_PE_indirect))) && // GCC 4.7 linux
+ "Unexpected TTypeEncoding");
+ (void)ttypeEncoding;
+
+ const uint8_t* ttypePtr = classInfo - ttypeIndex * sizeof(uintptr_t);
+ return reinterpret_cast<const __shim_type_info *>(
+ read_target2_value(ttypePtr));
+}
+#else // !defined(_LIBCXXABI_ARM_EHABI)
+static
+const __shim_type_info*
+get_shim_type_info(uint64_t ttypeIndex, const uint8_t* classInfo,
+ uint8_t ttypeEncoding, bool native_exception,
+ _Unwind_Exception* unwind_exception)
+{
+ if (classInfo == 0)
+ {
+ // this should not happen. Indicates corrupted eh_table.
+ call_terminate(native_exception, unwind_exception);
+ }
+ switch (ttypeEncoding & 0x0F)
+ {
+ case DW_EH_PE_absptr:
+ ttypeIndex *= sizeof(void*);
+ break;
+ case DW_EH_PE_udata2:
+ case DW_EH_PE_sdata2:
+ ttypeIndex *= 2;
+ break;
+ case DW_EH_PE_udata4:
+ case DW_EH_PE_sdata4:
+ ttypeIndex *= 4;
+ break;
+ case DW_EH_PE_udata8:
+ case DW_EH_PE_sdata8:
+ ttypeIndex *= 8;
+ break;
+ default:
+ // this should not happen. Indicates corrupted eh_table.
+ call_terminate(native_exception, unwind_exception);
+ }
+ classInfo -= ttypeIndex;
+ return (const __shim_type_info*)readEncodedPointer(&classInfo, ttypeEncoding);
+}
+#endif // !defined(_LIBCXXABI_ARM_EHABI)
+
+/*
+ This is checking a thrown exception type, excpType, against a possibly empty
+ list of catchType's which make up an exception spec.
+
+ An exception spec acts like a catch handler, but in reverse. This "catch
+ handler" will catch an excpType if and only if none of the catchType's in
+ the list will catch a excpType. If any catchType in the list can catch an
+ excpType, then this exception spec does not catch the excpType.
+*/
+#if defined(_LIBCXXABI_ARM_EHABI)
+static
+bool
+exception_spec_can_catch(int64_t specIndex, const uint8_t* classInfo,
+ uint8_t ttypeEncoding, const __shim_type_info* excpType,
+ void* adjustedPtr, _Unwind_Exception* unwind_exception)
+{
+ if (classInfo == 0)
+ {
+ // this should not happen. Indicates corrupted eh_table.
+ call_terminate(false, unwind_exception);
+ }
+
+ assert(((ttypeEncoding == DW_EH_PE_absptr) || // LLVM or GCC 4.6
+ (ttypeEncoding == DW_EH_PE_pcrel) || // GCC 4.7 baremetal
+ (ttypeEncoding == (DW_EH_PE_pcrel | DW_EH_PE_indirect))) && // GCC 4.7 linux
+ "Unexpected TTypeEncoding");
+ (void)ttypeEncoding;
+
+ // specIndex is negative of 1-based byte offset into classInfo;
+ specIndex = -specIndex;
+ --specIndex;
+ const void** temp = reinterpret_cast<const void**>(
+ reinterpret_cast<uintptr_t>(classInfo) +
+ static_cast<uintptr_t>(specIndex) * sizeof(uintptr_t));
+ // If any type in the spec list can catch excpType, return false, else return true
+ // adjustments to adjustedPtr are ignored.
+ while (true)
+ {
+ // ARM EHABI exception specification table (filter table) consists of
+ // several pointers which will directly point to the type info object
+ // (instead of ttypeIndex). The table will be terminated with 0.
+ const void** ttypePtr = temp++;
+ if (*ttypePtr == 0)
+ break;
+ // We can get the __shim_type_info simply by performing a
+ // R_ARM_TARGET2 relocation, and cast the result to __shim_type_info.
+ const __shim_type_info* catchType =
+ static_cast<const __shim_type_info*>(read_target2_value(ttypePtr));
+ void* tempPtr = adjustedPtr;
+ if (catchType->can_catch(excpType, tempPtr))
+ return false;
+ }
+ return true;
+}
+#else
+static
+bool
+exception_spec_can_catch(int64_t specIndex, const uint8_t* classInfo,
+ uint8_t ttypeEncoding, const __shim_type_info* excpType,
+ void* adjustedPtr, _Unwind_Exception* unwind_exception)
+{
+ if (classInfo == 0)
+ {
+ // this should not happen. Indicates corrupted eh_table.
+ call_terminate(false, unwind_exception);
+ }
+ // specIndex is negative of 1-based byte offset into classInfo;
+ specIndex = -specIndex;
+ --specIndex;
+ const uint8_t* temp = classInfo + specIndex;
+ // If any type in the spec list can catch excpType, return false, else return true
+ // adjustments to adjustedPtr are ignored.
+ while (true)
+ {
+ uint64_t ttypeIndex = readULEB128(&temp);
+ if (ttypeIndex == 0)
+ break;
+ const __shim_type_info* catchType = get_shim_type_info(ttypeIndex,
+ classInfo,
+ ttypeEncoding,
+ true,
+ unwind_exception);
+ void* tempPtr = adjustedPtr;
+ if (catchType->can_catch(excpType, tempPtr))
+ return false;
+ }
+ return true;
+}
+#endif
+
+static
+void*
+get_thrown_object_ptr(_Unwind_Exception* unwind_exception)
+{
+ // Even for foreign exceptions, the exception object is *probably* at unwind_exception + 1
+ // Regardless, this library is prohibited from touching a foreign exception
+ void* adjustedPtr = unwind_exception + 1;
+ if (__getExceptionClass(unwind_exception) == kOurDependentExceptionClass)
+ adjustedPtr = ((__cxa_dependent_exception*)adjustedPtr - 1)->primaryException;
+ return adjustedPtr;
+}
+
+namespace
+{
+
+struct scan_results
+{
+ int64_t ttypeIndex; // > 0 catch handler, < 0 exception spec handler, == 0 a cleanup
+ const uint8_t* actionRecord; // Currently unused. Retained to ease future maintenance.
+ const uint8_t* languageSpecificData; // Needed only for __cxa_call_unexpected
+ uintptr_t landingPad; // null -> nothing found, else something found
+ void* adjustedPtr; // Used in cxa_exception.cpp
+ _Unwind_Reason_Code reason; // One of _URC_FATAL_PHASE1_ERROR,
+ // _URC_FATAL_PHASE2_ERROR,
+ // _URC_CONTINUE_UNWIND,
+ // _URC_HANDLER_FOUND
+};
+
+} // unnamed namespace
+
+static
+void
+set_registers(_Unwind_Exception* unwind_exception, _Unwind_Context* context,
+ const scan_results& results)
+{
+#if defined(__USING_SJLJ_EXCEPTIONS__)
+#define __builtin_eh_return_data_regno(regno) regno
+#endif
+ _Unwind_SetGR(context, __builtin_eh_return_data_regno(0),
+ reinterpret_cast<uintptr_t>(unwind_exception));
+ _Unwind_SetGR(context, __builtin_eh_return_data_regno(1),
+ static_cast<uintptr_t>(results.ttypeIndex));
+ _Unwind_SetIP(context, results.landingPad);
+}
+
+/*
+ There are 3 types of scans needed:
+
+ 1. Scan for handler with native or foreign exception. If handler found,
+ save state and return _URC_HANDLER_FOUND, else return _URC_CONTINUE_UNWIND.
+ May also report an error on invalid input.
+ May terminate for invalid exception table.
+ _UA_SEARCH_PHASE
+
+ 2. Scan for handler with foreign exception. Must return _URC_HANDLER_FOUND,
+ or call terminate.
+ _UA_CLEANUP_PHASE && _UA_HANDLER_FRAME && !native_exception
+
+ 3. Scan for cleanups. If a handler is found and this isn't forced unwind,
+ then terminate, otherwise ignore the handler and keep looking for cleanup.
+ If a cleanup is found, return _URC_HANDLER_FOUND, else return _URC_CONTINUE_UNWIND.
+ May also report an error on invalid input.
+ May terminate for invalid exception table.
+ _UA_CLEANUP_PHASE && !_UA_HANDLER_FRAME
+*/
+
+static void scan_eh_tab(scan_results &results, _Unwind_Action actions,
+ bool native_exception,
+ _Unwind_Exception *unwind_exception,
+ _Unwind_Context *context) {
+ // Initialize results to found nothing but an error
+ results.ttypeIndex = 0;
+ results.actionRecord = 0;
+ results.languageSpecificData = 0;
+ results.landingPad = 0;
+ results.adjustedPtr = 0;
+ results.reason = _URC_FATAL_PHASE1_ERROR;
+ // Check for consistent actions
+ if (actions & _UA_SEARCH_PHASE)
+ {
+ // Do Phase 1
+ if (actions & (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME | _UA_FORCE_UNWIND))
+ {
+ // None of these flags should be set during Phase 1
+ // Client error
+ results.reason = _URC_FATAL_PHASE1_ERROR;
+ return;
+ }
+ }
+ else if (actions & _UA_CLEANUP_PHASE)
+ {
+ if ((actions & _UA_HANDLER_FRAME) && (actions & _UA_FORCE_UNWIND))
+ {
+ // _UA_HANDLER_FRAME should only be set if phase 1 found a handler.
+ // If _UA_FORCE_UNWIND is set, phase 1 shouldn't have happened.
+ // Client error
+ results.reason = _URC_FATAL_PHASE2_ERROR;
+ return;
+ }
+ }
+ else // Neither _UA_SEARCH_PHASE nor _UA_CLEANUP_PHASE is set
+ {
+ // One of these should be set.
+ // Client error
+ results.reason = _URC_FATAL_PHASE1_ERROR;
+ return;
+ }
+ // Start scan by getting exception table address
+ const uint8_t *lsda = (const uint8_t *)_Unwind_GetLanguageSpecificData(context);
+ if (lsda == 0)
+ {
+ // There is no exception table
+ results.reason = _URC_CONTINUE_UNWIND;
+ return;
+ }
+ results.languageSpecificData = lsda;
+ // Get the current instruction pointer and offset it before next
+ // instruction in the current frame which threw the exception.
+ uintptr_t ip = _Unwind_GetIP(context) - 1;
+ // Get beginning current frame's code (as defined by the
+ // emitted dwarf code)
+ uintptr_t funcStart = _Unwind_GetRegionStart(context);
+#ifdef __USING_SJLJ_EXCEPTIONS__
+ if (ip == uintptr_t(-1))
+ {
+ // no action
+ results.reason = _URC_CONTINUE_UNWIND;
+ return;
+ }
+ else if (ip == 0)
+ call_terminate(native_exception, unwind_exception);
+ // ip is 1-based index into call site table
+#else // !__USING_SJLJ_EXCEPTIONS__
+ uintptr_t ipOffset = ip - funcStart;
+#endif // !defined(_USING_SLJL_EXCEPTIONS__)
+ const uint8_t* classInfo = NULL;
+ // Note: See JITDwarfEmitter::EmitExceptionTable(...) for corresponding
+ // dwarf emission
+ // Parse LSDA header.
+ uint8_t lpStartEncoding = *lsda++;
+ const uint8_t* lpStart = (const uint8_t*)readEncodedPointer(&lsda, lpStartEncoding);
+ if (lpStart == 0)
+ lpStart = (const uint8_t*)funcStart;
+ uint8_t ttypeEncoding = *lsda++;
+ if (ttypeEncoding != DW_EH_PE_omit)
+ {
+ // Calculate type info locations in emitted dwarf code which
+ // were flagged by type info arguments to llvm.eh.selector
+ // intrinsic
+ uintptr_t classInfoOffset = readULEB128(&lsda);
+ classInfo = lsda + classInfoOffset;
+ }
+ // Walk call-site table looking for range that
+ // includes current PC.
+ uint8_t callSiteEncoding = *lsda++;
+#ifdef __USING_SJLJ_EXCEPTIONS__
+ (void)callSiteEncoding; // When using SjLj exceptions, callSiteEncoding is never used
+#endif
+ uint32_t callSiteTableLength = static_cast<uint32_t>(readULEB128(&lsda));
+ const uint8_t* callSiteTableStart = lsda;
+ const uint8_t* callSiteTableEnd = callSiteTableStart + callSiteTableLength;
+ const uint8_t* actionTableStart = callSiteTableEnd;
+ const uint8_t* callSitePtr = callSiteTableStart;
+ while (callSitePtr < callSiteTableEnd)
+ {
+ // There is one entry per call site.
+#ifndef __USING_SJLJ_EXCEPTIONS__
+ // The call sites are non-overlapping in [start, start+length)
+ // The call sites are ordered in increasing value of start
+ uintptr_t start = readEncodedPointer(&callSitePtr, callSiteEncoding);
+ uintptr_t length = readEncodedPointer(&callSitePtr, callSiteEncoding);
+ uintptr_t landingPad = readEncodedPointer(&callSitePtr, callSiteEncoding);
+ uintptr_t actionEntry = readULEB128(&callSitePtr);
+ if ((start <= ipOffset) && (ipOffset < (start + length)))
+#else // __USING_SJLJ_EXCEPTIONS__
+ // ip is 1-based index into this table
+ uintptr_t landingPad = readULEB128(&callSitePtr);
+ uintptr_t actionEntry = readULEB128(&callSitePtr);
+ if (--ip == 0)
+#endif // __USING_SJLJ_EXCEPTIONS__
+ {
+ // Found the call site containing ip.
+#ifndef __USING_SJLJ_EXCEPTIONS__
+ if (landingPad == 0)
+ {
+ // No handler here
+ results.reason = _URC_CONTINUE_UNWIND;
+ return;
+ }
+ landingPad = (uintptr_t)lpStart + landingPad;
+#else // __USING_SJLJ_EXCEPTIONS__
+ ++landingPad;
+#endif // __USING_SJLJ_EXCEPTIONS__
+ if (actionEntry == 0)
+ {
+ // Found a cleanup
+ // If this is a type 1 or type 2 search, there are no handlers
+ // If this is a type 3 search, you want to install the cleanup.
+ if ((actions & _UA_CLEANUP_PHASE) && !(actions & _UA_HANDLER_FRAME))
+ {
+ results.ttypeIndex = 0; // Redundant but clarifying
+ results.landingPad = landingPad;
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ // No handler here
+ results.reason = _URC_CONTINUE_UNWIND;
+ return;
+ }
+ // Convert 1-based byte offset into
+ const uint8_t* action = actionTableStart + (actionEntry - 1);
+ // Scan action entries until you find a matching handler, cleanup, or the end of action list
+ while (true)
+ {
+ const uint8_t* actionRecord = action;
+ int64_t ttypeIndex = readSLEB128(&action);
+ if (ttypeIndex > 0)
+ {
+ // Found a catch, does it actually catch?
+ // First check for catch (...)
+ const __shim_type_info* catchType =
+ get_shim_type_info(static_cast<uint64_t>(ttypeIndex),
+ classInfo, ttypeEncoding,
+ native_exception, unwind_exception);
+ if (catchType == 0)
+ {
+ // Found catch (...) catches everything, including foreign exceptions
+ // If this is a type 1 search save state and return _URC_HANDLER_FOUND
+ // If this is a type 2 search save state and return _URC_HANDLER_FOUND
+ // If this is a type 3 search !_UA_FORCE_UNWIND, we should have found this in phase 1!
+ // If this is a type 3 search _UA_FORCE_UNWIND, ignore handler and continue scan
+ if ((actions & _UA_SEARCH_PHASE) || (actions & _UA_HANDLER_FRAME))
+ {
+ // Save state and return _URC_HANDLER_FOUND
+ results.ttypeIndex = ttypeIndex;
+ results.actionRecord = actionRecord;
+ results.landingPad = landingPad;
+ results.adjustedPtr = get_thrown_object_ptr(unwind_exception);
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ else if (!(actions & _UA_FORCE_UNWIND))
+ {
+ // It looks like the exception table has changed
+ // on us. Likely stack corruption!
+ call_terminate(native_exception, unwind_exception);
+ }
+ }
+ // Else this is a catch (T) clause and will never
+ // catch a foreign exception
+ else if (native_exception)
+ {
+ __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ void* adjustedPtr = get_thrown_object_ptr(unwind_exception);
+ const __shim_type_info* excpType =
+ static_cast<const __shim_type_info*>(exception_header->exceptionType);
+ if (adjustedPtr == 0 || excpType == 0)
+ {
+ // Something very bad happened
+ call_terminate(native_exception, unwind_exception);
+ }
+ if (catchType->can_catch(excpType, adjustedPtr))
+ {
+ // Found a matching handler
+ // If this is a type 1 search save state and return _URC_HANDLER_FOUND
+ // If this is a type 3 search and !_UA_FORCE_UNWIND, we should have found this in phase 1!
+ // If this is a type 3 search and _UA_FORCE_UNWIND, ignore handler and continue scan
+ if (actions & _UA_SEARCH_PHASE)
+ {
+ // Save state and return _URC_HANDLER_FOUND
+ results.ttypeIndex = ttypeIndex;
+ results.actionRecord = actionRecord;
+ results.landingPad = landingPad;
+ results.adjustedPtr = adjustedPtr;
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ else if (!(actions & _UA_FORCE_UNWIND))
+ {
+ // It looks like the exception table has changed
+ // on us. Likely stack corruption!
+ call_terminate(native_exception, unwind_exception);
+ }
+ }
+ }
+ // Scan next action ...
+ }
+ else if (ttypeIndex < 0)
+ {
+ // Found an exception spec. If this is a foreign exception,
+ // it is always caught.
+ if (native_exception)
+ {
+ // Does the exception spec catch this native exception?
+ __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ void* adjustedPtr = get_thrown_object_ptr(unwind_exception);
+ const __shim_type_info* excpType =
+ static_cast<const __shim_type_info*>(exception_header->exceptionType);
+ if (adjustedPtr == 0 || excpType == 0)
+ {
+ // Something very bad happened
+ call_terminate(native_exception, unwind_exception);
+ }
+ if (exception_spec_can_catch(ttypeIndex, classInfo,
+ ttypeEncoding, excpType,
+ adjustedPtr, unwind_exception))
+ {
+ // native exception caught by exception spec
+ // If this is a type 1 search, save state and return _URC_HANDLER_FOUND
+ // If this is a type 3 search !_UA_FORCE_UNWIND, we should have found this in phase 1!
+ // If this is a type 3 search _UA_FORCE_UNWIND, ignore handler and continue scan
+ if (actions & _UA_SEARCH_PHASE)
+ {
+ // Save state and return _URC_HANDLER_FOUND
+ results.ttypeIndex = ttypeIndex;
+ results.actionRecord = actionRecord;
+ results.landingPad = landingPad;
+ results.adjustedPtr = adjustedPtr;
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ else if (!(actions & _UA_FORCE_UNWIND))
+ {
+ // It looks like the exception table has changed
+ // on us. Likely stack corruption!
+ call_terminate(native_exception, unwind_exception);
+ }
+ }
+ }
+ else
+ {
+ // foreign exception caught by exception spec
+ // If this is a type 1 search, save state and return _URC_HANDLER_FOUND
+ // If this is a type 2 search, save state and return _URC_HANDLER_FOUND
+ // If this is a type 3 search !_UA_FORCE_UNWIND, we should have found this in phase 1!
+ // If this is a type 3 search _UA_FORCE_UNWIND, ignore handler and continue scan
+ if ((actions & _UA_SEARCH_PHASE) || (actions & _UA_HANDLER_FRAME))
+ {
+ // Save state and return _URC_HANDLER_FOUND
+ results.ttypeIndex = ttypeIndex;
+ results.actionRecord = actionRecord;
+ results.landingPad = landingPad;
+ results.adjustedPtr = get_thrown_object_ptr(unwind_exception);
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ else if (!(actions & _UA_FORCE_UNWIND))
+ {
+ // It looks like the exception table has changed
+ // on us. Likely stack corruption!
+ call_terminate(native_exception, unwind_exception);
+ }
+ }
+ // Scan next action ...
+ }
+ else // ttypeIndex == 0
+ {
+ // Found a cleanup
+ // If this is a type 1 search, ignore it and continue scan
+ // If this is a type 2 search, ignore it and continue scan
+ // If this is a type 3 search, save state and return _URC_HANDLER_FOUND
+ if ((actions & _UA_CLEANUP_PHASE) && !(actions & _UA_HANDLER_FRAME))
+ {
+ // Save state and return _URC_HANDLER_FOUND
+ results.ttypeIndex = ttypeIndex;
+ results.actionRecord = actionRecord;
+ results.landingPad = landingPad;
+ results.adjustedPtr = get_thrown_object_ptr(unwind_exception);
+ results.reason = _URC_HANDLER_FOUND;
+ return;
+ }
+ }
+ const uint8_t* temp = action;
+ int64_t actionOffset = readSLEB128(&temp);
+ if (actionOffset == 0)
+ {
+ // End of action list, no matching handler or cleanup found
+ results.reason = _URC_CONTINUE_UNWIND;
+ return;
+ }
+ // Go to next action
+ action += actionOffset;
+ } // there is no break out of this loop, only return
+ }
+#ifndef __USING_SJLJ_EXCEPTIONS__
+ else if (ipOffset < start)
+ {
+ // There is no call site for this ip
+ // Something bad has happened. We should never get here.
+ // Possible stack corruption.
+ call_terminate(native_exception, unwind_exception);
+ }
+#endif // !__USING_SJLJ_EXCEPTIONS__
+ } // there might be some tricky cases which break out of this loop
+
+ // It is possible that no eh table entry specify how to handle
+ // this exception. By spec, terminate it immediately.
+ call_terminate(native_exception, unwind_exception);
+}
+
+// public API
+
+/*
+The personality function branches on actions like so:
+
+_UA_SEARCH_PHASE
+
+ If _UA_CLEANUP_PHASE or _UA_HANDLER_FRAME or _UA_FORCE_UNWIND there's
+ an error from above, return _URC_FATAL_PHASE1_ERROR.
+
+ Scan for anything that could stop unwinding:
+
+ 1. A catch clause that will catch this exception
+ (will never catch foreign).
+ 2. A catch (...) (will always catch foreign).
+ 3. An exception spec that will catch this exception
+ (will always catch foreign).
+ If a handler is found
+ If not foreign
+ Save state in header
+ return _URC_HANDLER_FOUND
+ Else a handler not found
+ return _URC_CONTINUE_UNWIND
+
+_UA_CLEANUP_PHASE
+
+ If _UA_HANDLER_FRAME
+ If _UA_FORCE_UNWIND
+ How did this happen? return _URC_FATAL_PHASE2_ERROR
+ If foreign
+ Do _UA_SEARCH_PHASE to recover state
+ else
+ Recover state from header
+ Transfer control to landing pad. return _URC_INSTALL_CONTEXT
+
+ Else
+
+ This branch handles both normal C++ non-catching handlers (cleanups)
+ and forced unwinding.
+ Scan for anything that can not stop unwinding:
+
+ 1. A cleanup.
+
+ If a cleanup is found
+ transfer control to it. return _URC_INSTALL_CONTEXT
+ Else a cleanup is not found: return _URC_CONTINUE_UNWIND
+*/
+
+#if !defined(_LIBCXXABI_ARM_EHABI)
+#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
+static _Unwind_Reason_Code __gxx_personality_imp
+#else
+_LIBCXXABI_FUNC_VIS _Unwind_Reason_Code
+#ifdef __USING_SJLJ_EXCEPTIONS__
+__gxx_personality_sj0
+#else
+__gxx_personality_v0
+#endif
+#endif
+ (int version, _Unwind_Action actions, uint64_t exceptionClass,
+ _Unwind_Exception* unwind_exception, _Unwind_Context* context)
+{
+ if (version != 1 || unwind_exception == 0 || context == 0)
+ return _URC_FATAL_PHASE1_ERROR;
+
+ bool native_exception = (exceptionClass & get_vendor_and_language) ==
+ (kOurExceptionClass & get_vendor_and_language);
+ scan_results results;
+ if (actions & _UA_SEARCH_PHASE)
+ {
+ // Phase 1 search: All we're looking for in phase 1 is a handler that
+ // halts unwinding
+ scan_eh_tab(results, actions, native_exception, unwind_exception, context);
+ if (results.reason == _URC_HANDLER_FOUND)
+ {
+ // Found one. Can we cache the results somewhere to optimize phase 2?
+ if (native_exception)
+ {
+ __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ exception_header->handlerSwitchValue = static_cast<int>(results.ttypeIndex);
+ exception_header->actionRecord = results.actionRecord;
+ exception_header->languageSpecificData = results.languageSpecificData;
+ exception_header->catchTemp = reinterpret_cast<void*>(results.landingPad);
+ exception_header->adjustedPtr = results.adjustedPtr;
+ }
+ return _URC_HANDLER_FOUND;
+ }
+ // Did not find a catching-handler. Return the results of the scan
+ // (normally _URC_CONTINUE_UNWIND, but could have been _URC_FATAL_PHASE1_ERROR
+ // if we were called improperly).
+ return results.reason;
+ }
+ if (actions & _UA_CLEANUP_PHASE)
+ {
+ // Phase 2 search:
+ // Did we find a catching handler in phase 1?
+ if (actions & _UA_HANDLER_FRAME)
+ {
+ // Yes, phase 1 said we have a catching handler here.
+ // Did we cache the results of the scan?
+ if (native_exception)
+ {
+ // Yes, reload the results from the cache.
+ __cxa_exception* exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ results.ttypeIndex = exception_header->handlerSwitchValue;
+ results.actionRecord = exception_header->actionRecord;
+ results.languageSpecificData = exception_header->languageSpecificData;
+ results.landingPad = reinterpret_cast<uintptr_t>(exception_header->catchTemp);
+ results.adjustedPtr = exception_header->adjustedPtr;
+ }
+ else
+ {
+ // No, do the scan again to reload the results.
+ scan_eh_tab(results, actions, native_exception, unwind_exception, context);
+ // Phase 1 told us we would find a handler. Now in Phase 2 we
+ // didn't find a handler. The eh table should not be changing!
+ if (results.reason != _URC_HANDLER_FOUND)
+ call_terminate(native_exception, unwind_exception);
+ }
+ // Jump to the handler
+ set_registers(unwind_exception, context, results);
+ return _URC_INSTALL_CONTEXT;
+ }
+ // Either we didn't do a phase 1 search (due to forced unwinding), or
+ // phase 1 reported no catching-handlers.
+ // Search for a (non-catching) cleanup
+ scan_eh_tab(results, actions, native_exception, unwind_exception, context);
+ if (results.reason == _URC_HANDLER_FOUND)
+ {
+ // Found a non-catching handler. Jump to it:
+ set_registers(unwind_exception, context, results);
+ return _URC_INSTALL_CONTEXT;
+ }
+ // Did not find a cleanup. Return the results of the scan
+ // (normally _URC_CONTINUE_UNWIND, but could have been _URC_FATAL_PHASE2_ERROR
+ // if we were called improperly).
+ return results.reason;
+ }
+ // We were called improperly: neither a phase 1 or phase 2 search
+ return _URC_FATAL_PHASE1_ERROR;
+}
+
+#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
+extern "C" _LIBCXXABI_FUNC_VIS EXCEPTION_DISPOSITION
+__gxx_personality_seh0(PEXCEPTION_RECORD ms_exc, void *this_frame,
+ PCONTEXT ms_orig_context, PDISPATCHER_CONTEXT ms_disp)
+{
+ return _GCC_specific_handler(ms_exc, this_frame, ms_orig_context, ms_disp,
+ __gxx_personality_imp);
+}
+#endif
+
+#else
+
+extern "C" _Unwind_Reason_Code __gnu_unwind_frame(_Unwind_Exception*,
+ _Unwind_Context*);
+
+// Helper function to unwind one frame.
+// ARM EHABI 7.3 and 7.4: If the personality function returns _URC_CONTINUE_UNWIND, the
+// personality routine should update the virtual register set (VRS) according to the
+// corresponding frame unwinding instructions (ARM EHABI 9.3.)
+static _Unwind_Reason_Code continue_unwind(_Unwind_Exception* unwind_exception,
+ _Unwind_Context* context)
+{
+ if (__gnu_unwind_frame(unwind_exception, context) != _URC_OK)
+ return _URC_FAILURE;
+ return _URC_CONTINUE_UNWIND;
+}
+
+// ARM register names
+#if !defined(LIBCXXABI_USE_LLVM_UNWINDER)
+static const uint32_t REG_UCB = 12; // Register to save _Unwind_Control_Block
+#endif
+static const uint32_t REG_SP = 13;
+
+static void save_results_to_barrier_cache(_Unwind_Exception* unwind_exception,
+ const scan_results& results)
+{
+ unwind_exception->barrier_cache.bitpattern[0] = (uint32_t)results.adjustedPtr;
+ unwind_exception->barrier_cache.bitpattern[1] = (uint32_t)results.actionRecord;
+ unwind_exception->barrier_cache.bitpattern[2] = (uint32_t)results.languageSpecificData;
+ unwind_exception->barrier_cache.bitpattern[3] = (uint32_t)results.landingPad;
+ unwind_exception->barrier_cache.bitpattern[4] = (uint32_t)results.ttypeIndex;
+}
+
+static void load_results_from_barrier_cache(scan_results& results,
+ const _Unwind_Exception* unwind_exception)
+{
+ results.adjustedPtr = (void*)unwind_exception->barrier_cache.bitpattern[0];
+ results.actionRecord = (const uint8_t*)unwind_exception->barrier_cache.bitpattern[1];
+ results.languageSpecificData = (const uint8_t*)unwind_exception->barrier_cache.bitpattern[2];
+ results.landingPad = (uintptr_t)unwind_exception->barrier_cache.bitpattern[3];
+ results.ttypeIndex = (int64_t)(int32_t)unwind_exception->barrier_cache.bitpattern[4];
+}
+
+extern "C" _LIBCXXABI_FUNC_VIS _Unwind_Reason_Code
+__gxx_personality_v0(_Unwind_State state,
+ _Unwind_Exception* unwind_exception,
+ _Unwind_Context* context)
+{
+ if (unwind_exception == 0 || context == 0)
+ return _URC_FATAL_PHASE1_ERROR;
+
+ bool native_exception = __isOurExceptionClass(unwind_exception);
+
+#if !defined(LIBCXXABI_USE_LLVM_UNWINDER)
+ // Copy the address of _Unwind_Control_Block to r12 so that
+ // _Unwind_GetLanguageSpecificData() and _Unwind_GetRegionStart() can
+ // return correct address.
+ _Unwind_SetGR(context, REG_UCB, reinterpret_cast<uint32_t>(unwind_exception));
+#endif
+
+ // Check the undocumented force unwinding behavior
+ bool is_force_unwinding = state & _US_FORCE_UNWIND;
+ state &= ~_US_FORCE_UNWIND;
+
+ scan_results results;
+ switch (state) {
+ case _US_VIRTUAL_UNWIND_FRAME:
+ if (is_force_unwinding)
+ return continue_unwind(unwind_exception, context);
+
+ // Phase 1 search: All we're looking for in phase 1 is a handler that halts unwinding
+ scan_eh_tab(results, _UA_SEARCH_PHASE, native_exception, unwind_exception, context);
+ if (results.reason == _URC_HANDLER_FOUND)
+ {
+ unwind_exception->barrier_cache.sp = _Unwind_GetGR(context, REG_SP);
+ if (native_exception)
+ save_results_to_barrier_cache(unwind_exception, results);
+ return _URC_HANDLER_FOUND;
+ }
+ // Did not find the catch handler
+ if (results.reason == _URC_CONTINUE_UNWIND)
+ return continue_unwind(unwind_exception, context);
+ return results.reason;
+
+ case _US_UNWIND_FRAME_STARTING:
+ // TODO: Support force unwinding in the phase 2 search.
+ // NOTE: In order to call the cleanup functions, _Unwind_ForcedUnwind()
+ // will call this personality function with (_US_FORCE_UNWIND |
+ // _US_UNWIND_FRAME_STARTING).
+
+ // Phase 2 search
+ if (unwind_exception->barrier_cache.sp == _Unwind_GetGR(context, REG_SP))
+ {
+ // Found a catching handler in phase 1
+ if (native_exception)
+ {
+ // Load the result from the native exception barrier cache.
+ load_results_from_barrier_cache(results, unwind_exception);
+ results.reason = _URC_HANDLER_FOUND;
+ }
+ else
+ {
+ // Search for the catching handler again for the foreign exception.
+ scan_eh_tab(results, static_cast<_Unwind_Action>(_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME),
+ native_exception, unwind_exception, context);
+ if (results.reason != _URC_HANDLER_FOUND) // phase1 search should guarantee to find one
+ call_terminate(native_exception, unwind_exception);
+ }
+
+ // Install the context for the catching handler
+ set_registers(unwind_exception, context, results);
+ return _URC_INSTALL_CONTEXT;
+ }
+
+ // Either we didn't do a phase 1 search (due to forced unwinding), or
+ // phase 1 reported no catching-handlers.
+ // Search for a (non-catching) cleanup
+ scan_eh_tab(results, _UA_CLEANUP_PHASE, native_exception, unwind_exception, context);
+ if (results.reason == _URC_HANDLER_FOUND)
+ {
+ // Found a non-catching handler
+
+ // ARM EHABI 8.4.2: Before we can jump to the cleanup handler, we have to setup some
+ // internal data structures, so that __cxa_end_cleanup() can get unwind_exception from
+ // __cxa_get_globals().
+ __cxa_begin_cleanup(unwind_exception);
+
+ // Install the context for the cleanup handler
+ set_registers(unwind_exception, context, results);
+ return _URC_INSTALL_CONTEXT;
+ }
+
+ // Did not find any handler
+ if (results.reason == _URC_CONTINUE_UNWIND)
+ return continue_unwind(unwind_exception, context);
+ return results.reason;
+
+ case _US_UNWIND_FRAME_RESUME:
+ return continue_unwind(unwind_exception, context);
+ }
+
+ // We were called improperly: neither a phase 1 or phase 2 search
+ return _URC_FATAL_PHASE1_ERROR;
+}
+#endif
+
+
+__attribute__((noreturn))
+_LIBCXXABI_FUNC_VIS void
+__cxa_call_unexpected(void* arg)
+{
+ _Unwind_Exception* unwind_exception = static_cast<_Unwind_Exception*>(arg);
+ if (unwind_exception == 0)
+ call_terminate(false, unwind_exception);
+ __cxa_begin_catch(unwind_exception);
+ bool native_old_exception = __isOurExceptionClass(unwind_exception);
+ std::unexpected_handler u_handler;
+ std::terminate_handler t_handler;
+ __cxa_exception* old_exception_header = 0;
+ int64_t ttypeIndex;
+ const uint8_t* lsda;
+ if (native_old_exception)
+ {
+ old_exception_header = (__cxa_exception*)(unwind_exception+1) - 1;
+ t_handler = old_exception_header->terminateHandler;
+ u_handler = old_exception_header->unexpectedHandler;
+ // If std::__unexpected(u_handler) rethrows the same exception,
+ // these values get overwritten by the rethrow. So save them now:
+#if defined(_LIBCXXABI_ARM_EHABI)
+ ttypeIndex = (int64_t)(int32_t)unwind_exception->barrier_cache.bitpattern[4];
+ lsda = (const uint8_t*)unwind_exception->barrier_cache.bitpattern[2];
+#else
+ ttypeIndex = old_exception_header->handlerSwitchValue;
+ lsda = old_exception_header->languageSpecificData;
+#endif
+ }
+ else
+ {
+ t_handler = std::get_terminate();
+ u_handler = std::get_unexpected();
+ }
+ try
+ {
+ std::__unexpected(u_handler);
+ }
+ catch (...)
+ {
+ // If the old exception is foreign, then all we can do is terminate.
+ // We have no way to recover the needed old exception spec. There's
+ // no way to pass that information here. And the personality routine
+ // can't call us directly and do anything but terminate() if we throw
+ // from here.
+ if (native_old_exception)
+ {
+ // Have:
+ // old_exception_header->languageSpecificData
+ // old_exception_header->actionRecord
+ // Need
+ // const uint8_t* classInfo
+ // uint8_t ttypeEncoding
+ uint8_t lpStartEncoding = *lsda++;
+ const uint8_t* lpStart = (const uint8_t*)readEncodedPointer(&lsda, lpStartEncoding);
+ (void)lpStart; // purposefully unused. Just needed to increment lsda.
+ uint8_t ttypeEncoding = *lsda++;
+ if (ttypeEncoding == DW_EH_PE_omit)
+ std::__terminate(t_handler);
+ uintptr_t classInfoOffset = readULEB128(&lsda);
+ const uint8_t* classInfo = lsda + classInfoOffset;
+ // Is this new exception catchable by the exception spec at ttypeIndex?
+ // The answer is obviously yes if the new and old exceptions are the same exception
+ // If no
+ // throw;
+ __cxa_eh_globals* globals = __cxa_get_globals_fast();
+ __cxa_exception* new_exception_header = globals->caughtExceptions;
+ if (new_exception_header == 0)
+ // This shouldn't be able to happen!
+ std::__terminate(t_handler);
+ bool native_new_exception = __isOurExceptionClass(&new_exception_header->unwindHeader);
+ void* adjustedPtr;
+ if (native_new_exception && (new_exception_header != old_exception_header))
+ {
+ const __shim_type_info* excpType =
+ static_cast<const __shim_type_info*>(new_exception_header->exceptionType);
+ adjustedPtr =
+ __getExceptionClass(&new_exception_header->unwindHeader) == kOurDependentExceptionClass ?
+ ((__cxa_dependent_exception*)new_exception_header)->primaryException :
+ new_exception_header + 1;
+ if (!exception_spec_can_catch(ttypeIndex, classInfo, ttypeEncoding,
+ excpType, adjustedPtr, unwind_exception))
+ {
+ // We need to __cxa_end_catch, but for the old exception,
+ // not the new one. This is a little tricky ...
+ // Disguise new_exception_header as a rethrown exception, but
+ // don't actually rethrow it. This means you can temporarily
+ // end the catch clause enclosing new_exception_header without
+ // __cxa_end_catch destroying new_exception_header.
+ new_exception_header->handlerCount = -new_exception_header->handlerCount;
+ globals->uncaughtExceptions += 1;
+ // Call __cxa_end_catch for new_exception_header
+ __cxa_end_catch();
+ // Call __cxa_end_catch for old_exception_header
+ __cxa_end_catch();
+ // Renter this catch clause with new_exception_header
+ __cxa_begin_catch(&new_exception_header->unwindHeader);
+ // Rethrow new_exception_header
+ throw;
+ }
+ }
+ // Will a std::bad_exception be catchable by the exception spec at
+ // ttypeIndex?
+ // If no
+ // throw std::bad_exception();
+ const __shim_type_info* excpType =
+ static_cast<const __shim_type_info*>(&typeid(std::bad_exception));
+ std::bad_exception be;
+ adjustedPtr = &be;
+ if (!exception_spec_can_catch(ttypeIndex, classInfo, ttypeEncoding,
+ excpType, adjustedPtr, unwind_exception))
+ {
+ // We need to __cxa_end_catch for both the old exception and the
+ // new exception. Technically we should do it in that order.
+ // But it is expedient to do it in the opposite order:
+ // Call __cxa_end_catch for new_exception_header
+ __cxa_end_catch();
+ // Throw std::bad_exception will __cxa_end_catch for
+ // old_exception_header
+ throw be;
+ }
+ }
+ }
+ std::__terminate(t_handler);
+}
+
+} // extern "C"
+
+} // __cxxabiv1
Index: contrib/libcxxabi/src/cxa_thread_atexit.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_thread_atexit.cpp
@@ -0,0 +1,139 @@
+//===----------------------- cxa_thread_atexit.cpp ------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "abort_message.h"
+#include "cxxabi.h"
+#include <__threading_support>
+#include <cstdlib>
+
+namespace __cxxabiv1 {
+
+ using Dtor = void(*)(void*);
+
+ extern "C"
+#ifndef HAVE___CXA_THREAD_ATEXIT_IMPL
+ // A weak symbol is used to detect this function's presence in the C library
+ // at runtime, even if libc++ is built against an older libc
+ _LIBCXXABI_WEAK
+#endif
+ int __cxa_thread_atexit_impl(Dtor, void*, void*);
+
+#ifndef HAVE___CXA_THREAD_ATEXIT_IMPL
+
+namespace {
+ // This implementation is used if the C library does not provide
+ // __cxa_thread_atexit_impl() for us. It has a number of limitations that are
+ // difficult to impossible to address without ..._impl():
+ //
+ // - dso_symbol is ignored. This means that a shared library may be unloaded
+ // (via dlclose()) before its thread_local destructors have run.
+ //
+ // - thread_local destructors for the main thread are run by the destructor of
+ // a static object. This is later than expected; they should run before the
+ // destructors of any objects with static storage duration.
+ //
+ // - thread_local destructors on non-main threads run on the first iteration
+ // through the __libccpp_tls_key destructors.
+ // std::notify_all_at_thread_exit() and similar functions must be careful to
+ // wait until the second iteration to provide their intended ordering
+ // guarantees.
+ //
+ // Another limitation, though one shared with ..._impl(), is that any
+ // thread_locals that are first initialized after non-thread_local global
+ // destructors begin to run will not be destroyed. [basic.start.term] states
+ // that all thread_local destructors are sequenced before the destruction of
+ // objects with static storage duration, resulting in a contradiction if a
+ // thread_local is constructed after that point. Thus we consider such
+ // programs ill-formed, and don't bother to run those destructors. (If the
+ // program terminates abnormally after such a thread_local is constructed,
+ // the destructor is not expected to run and thus there is no contradiction.
+ // So construction still has to work.)
+
+ struct DtorList {
+ Dtor dtor;
+ void* obj;
+ DtorList* next;
+ };
+
+ // The linked list of thread-local destructors to run
+ __thread DtorList* dtors = nullptr;
+ // True if the destructors are currently scheduled to run on this thread
+ __thread bool dtors_alive = false;
+ // Used to trigger destructors on thread exit; value is ignored
+ std::__libcpp_tls_key dtors_key;
+
+ void run_dtors(void*) {
+ while (auto head = dtors) {
+ dtors = head->next;
+ head->dtor(head->obj);
+ std::free(head);
+ }
+
+ dtors_alive = false;
+ }
+
+ struct DtorsManager {
+ DtorsManager() {
+ // There is intentionally no matching std::__libcpp_tls_delete call, as
+ // __cxa_thread_atexit() may be called arbitrarily late (for example, from
+ // global destructors or atexit() handlers).
+ if (std::__libcpp_tls_create(&dtors_key, run_dtors) != 0) {
+ abort_message("std::__libcpp_tls_create() failed in __cxa_thread_atexit()");
+ }
+ }
+
+ ~DtorsManager() {
+ // std::__libcpp_tls_key destructors do not run on threads that call exit()
+ // (including when the main thread returns from main()), so we explicitly
+ // call the destructor here. This runs at exit time (potentially earlier
+ // if libc++abi is dlclose()'d). Any thread_locals initialized after this
+ // point will not be destroyed.
+ run_dtors(nullptr);
+ }
+ };
+} // namespace
+
+#endif // HAVE___CXA_THREAD_ATEXIT_IMPL
+
+extern "C" {
+
+ _LIBCXXABI_FUNC_VIS int __cxa_thread_atexit(Dtor dtor, void* obj, void* dso_symbol) throw() {
+#ifdef HAVE___CXA_THREAD_ATEXIT_IMPL
+ return __cxa_thread_atexit_impl(dtor, obj, dso_symbol);
+#else
+ if (__cxa_thread_atexit_impl) {
+ return __cxa_thread_atexit_impl(dtor, obj, dso_symbol);
+ } else {
+ // Initialize the dtors std::__libcpp_tls_key (uses __cxa_guard_*() for
+ // one-time initialization and __cxa_atexit() for destruction)
+ static DtorsManager manager;
+
+ if (!dtors_alive) {
+ if (std::__libcpp_tls_set(dtors_key, &dtors_key) != 0) {
+ return -1;
+ }
+ dtors_alive = true;
+ }
+
+ auto head = static_cast<DtorList*>(std::malloc(sizeof(DtorList)));
+ if (!head) {
+ return -1;
+ }
+
+ head->dtor = dtor;
+ head->obj = obj;
+ head->next = dtors;
+ dtors = head;
+
+ return 0;
+ }
+#endif // HAVE___CXA_THREAD_ATEXIT_IMPL
+ }
+
+} // extern "C"
+} // namespace __cxxabiv1
Index: contrib/libcxxabi/src/cxa_unexpected.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_unexpected.cpp
@@ -0,0 +1,22 @@
+//===------------------------- cxa_unexpected.cpp -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <exception>
+#include "cxxabi.h"
+#include "cxa_exception.hpp"
+
+namespace __cxxabiv1
+{
+
+extern "C"
+{
+
+}
+
+} // namespace __cxxabiv1
+
Index: contrib/libcxxabi/src/cxa_vector.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_vector.cpp
@@ -0,0 +1,366 @@
+//===-------------------------- cxa_vector.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the "Array Construction and Destruction APIs"
+// http://mentorembedded.github.io/cxx-abi/abi.html#array-ctor
+//
+//===----------------------------------------------------------------------===//
+
+#include "cxxabi.h"
+
+#include <exception> // for std::terminate
+
+namespace __cxxabiv1 {
+
+#if 0
+#pragma mark --Helper routines and classes --
+#endif
+
+namespace {
+ inline static size_t __get_element_count ( void *p ) {
+ return static_cast <size_t *> (p)[-1];
+ }
+
+ inline static void __set_element_count ( void *p, size_t element_count ) {
+ static_cast <size_t *> (p)[-1] = element_count;
+ }
+
+
+// A pair of classes to simplify exception handling and control flow.
+// They get passed a block of memory in the constructor, and unless the
+// 'release' method is called, they deallocate the memory in the destructor.
+// Preferred usage is to allocate some memory, attach it to one of these objects,
+// and then, when all the operations to set up the memory block have succeeded,
+// call 'release'. If any of the setup operations fail, or an exception is
+// thrown, then the block is automatically deallocated.
+//
+// The only difference between these two classes is the signature for the
+// deallocation function (to match new2/new3 and delete2/delete3.
+ class st_heap_block2 {
+ public:
+ typedef void (*dealloc_f)(void *);
+
+ st_heap_block2 ( dealloc_f dealloc, void *ptr )
+ : dealloc_ ( dealloc ), ptr_ ( ptr ), enabled_ ( true ) {}
+ ~st_heap_block2 () { if ( enabled_ ) dealloc_ ( ptr_ ) ; }
+ void release () { enabled_ = false; }
+
+ private:
+ dealloc_f dealloc_;
+ void *ptr_;
+ bool enabled_;
+ };
+
+ class st_heap_block3 {
+ public:
+ typedef void (*dealloc_f)(void *, size_t);
+
+ st_heap_block3 ( dealloc_f dealloc, void *ptr, size_t size )
+ : dealloc_ ( dealloc ), ptr_ ( ptr ), size_ ( size ), enabled_ ( true ) {}
+ ~st_heap_block3 () { if ( enabled_ ) dealloc_ ( ptr_, size_ ) ; }
+ void release () { enabled_ = false; }
+
+ private:
+ dealloc_f dealloc_;
+ void *ptr_;
+ size_t size_;
+ bool enabled_;
+ };
+
+ class st_cxa_cleanup {
+ public:
+ typedef void (*destruct_f)(void *);
+
+ st_cxa_cleanup ( void *ptr, size_t &idx, size_t element_size, destruct_f destructor )
+ : ptr_ ( ptr ), idx_ ( idx ), element_size_ ( element_size ),
+ destructor_ ( destructor ), enabled_ ( true ) {}
+ ~st_cxa_cleanup () {
+ if ( enabled_ )
+ __cxa_vec_cleanup ( ptr_, idx_, element_size_, destructor_ );
+ }
+
+ void release () { enabled_ = false; }
+
+ private:
+ void *ptr_;
+ size_t &idx_;
+ size_t element_size_;
+ destruct_f destructor_;
+ bool enabled_;
+ };
+
+ class st_terminate {
+ public:
+ st_terminate ( bool enabled = true ) : enabled_ ( enabled ) {}
+ ~st_terminate () { if ( enabled_ ) std::terminate (); }
+ void release () { enabled_ = false; }
+ private:
+ bool enabled_ ;
+ };
+}
+
+#if 0
+#pragma mark --Externally visible routines--
+#endif
+
+extern "C" {
+
+// Equivalent to
+//
+// __cxa_vec_new2(element_count, element_size, padding_size, constructor,
+// destructor, &::operator new[], &::operator delete[])
+_LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *)) {
+ return __cxa_vec_new2 ( element_count, element_size, padding_size,
+ constructor, destructor, &::operator new [], &::operator delete [] );
+}
+
+
+
+// Given the number and size of elements for an array and the non-negative
+// size of prefix padding for a cookie, allocate space (using alloc) for
+// the array preceded by the specified padding, initialize the cookie if
+// the padding is non-zero, and call the given constructor on each element.
+// Return the address of the array proper, after the padding.
+//
+// If alloc throws an exception, rethrow the exception. If alloc returns
+// NULL, return NULL. If the constructor throws an exception, call
+// destructor for any already constructed elements, and rethrow the
+// exception. If the destructor throws an exception, call std::terminate.
+//
+// The constructor may be NULL, in which case it must not be called. If the
+// padding_size is zero, the destructor may be NULL; in that case it must
+// not be called.
+//
+// Neither alloc nor dealloc may be NULL.
+_LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new2(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *),
+ void *(*alloc)(size_t), void (*dealloc)(void *)) {
+ const size_t heap_size = element_count * element_size + padding_size;
+ char * const heap_block = static_cast<char *> ( alloc ( heap_size ));
+ char *vec_base = heap_block;
+
+ if ( NULL != vec_base ) {
+ st_heap_block2 heap ( dealloc, heap_block );
+
+ // put the padding before the array elements
+ if ( 0 != padding_size ) {
+ vec_base += padding_size;
+ __set_element_count ( vec_base, element_count );
+ }
+
+ // Construct the elements
+ __cxa_vec_ctor ( vec_base, element_count, element_size, constructor, destructor );
+ heap.release (); // We're good!
+ }
+
+ return vec_base;
+}
+
+
+// Same as __cxa_vec_new2 except that the deallocation function takes both
+// the object address and its size.
+_LIBCXXABI_FUNC_VIS void *
+__cxa_vec_new3(size_t element_count, size_t element_size, size_t padding_size,
+ void (*constructor)(void *), void (*destructor)(void *),
+ void *(*alloc)(size_t), void (*dealloc)(void *, size_t)) {
+ const size_t heap_size = element_count * element_size + padding_size;
+ char * const heap_block = static_cast<char *> ( alloc ( heap_size ));
+ char *vec_base = heap_block;
+
+ if ( NULL != vec_base ) {
+ st_heap_block3 heap ( dealloc, heap_block, heap_size );
+
+ // put the padding before the array elements
+ if ( 0 != padding_size ) {
+ vec_base += padding_size;
+ __set_element_count ( vec_base, element_count );
+ }
+
+ // Construct the elements
+ __cxa_vec_ctor ( vec_base, element_count, element_size, constructor, destructor );
+ heap.release (); // We're good!
+ }
+
+ return vec_base;
+}
+
+
+// Given the (data) addresses of a destination and a source array, an
+// element count and an element size, call the given copy constructor to
+// copy each element from the source array to the destination array. The
+// copy constructor's arguments are the destination address and source
+// address, respectively. If an exception occurs, call the given destructor
+// (if non-NULL) on each copied element and rethrow. If the destructor
+// throws an exception, call terminate(). The constructor and or destructor
+// pointers may be NULL. If either is NULL, no action is taken when it
+// would have been called.
+
+_LIBCXXABI_FUNC_VIS void __cxa_vec_cctor(void *dest_array, void *src_array,
+ size_t element_count,
+ size_t element_size,
+ void (*constructor)(void *, void *),
+ void (*destructor)(void *)) {
+ if ( NULL != constructor ) {
+ size_t idx = 0;
+ char *src_ptr = static_cast<char *>(src_array);
+ char *dest_ptr = static_cast<char *>(dest_array);
+ st_cxa_cleanup cleanup ( dest_array, idx, element_size, destructor );
+
+ for ( idx = 0; idx < element_count;
+ ++idx, src_ptr += element_size, dest_ptr += element_size )
+ constructor ( dest_ptr, src_ptr );
+ cleanup.release (); // We're good!
+ }
+}
+
+
+// Given the (data) address of an array, not including any cookie padding,
+// and the number and size of its elements, call the given constructor on
+// each element. If the constructor throws an exception, call the given
+// destructor for any already-constructed elements, and rethrow the
+// exception. If the destructor throws an exception, call terminate(). The
+// constructor and/or destructor pointers may be NULL. If either is NULL,
+// no action is taken when it would have been called.
+_LIBCXXABI_FUNC_VIS void
+__cxa_vec_ctor(void *array_address, size_t element_count, size_t element_size,
+ void (*constructor)(void *), void (*destructor)(void *)) {
+ if ( NULL != constructor ) {
+ size_t idx;
+ char *ptr = static_cast <char *> ( array_address );
+ st_cxa_cleanup cleanup ( array_address, idx, element_size, destructor );
+
+ // Construct the elements
+ for ( idx = 0; idx < element_count; ++idx, ptr += element_size )
+ constructor ( ptr );
+ cleanup.release (); // We're good!
+ }
+}
+
+// Given the (data) address of an array, the number of elements, and the
+// size of its elements, call the given destructor on each element. If the
+// destructor throws an exception, rethrow after destroying the remaining
+// elements if possible. If the destructor throws a second exception, call
+// terminate(). The destructor pointer may be NULL, in which case this
+// routine does nothing.
+_LIBCXXABI_FUNC_VIS void __cxa_vec_dtor(void *array_address,
+ size_t element_count,
+ size_t element_size,
+ void (*destructor)(void *)) {
+ if ( NULL != destructor ) {
+ char *ptr = static_cast <char *> (array_address);
+ size_t idx = element_count;
+ st_cxa_cleanup cleanup ( array_address, idx, element_size, destructor );
+ {
+ st_terminate exception_guard (__cxa_uncaught_exception ());
+ ptr += element_count * element_size; // one past the last element
+
+ while ( idx-- > 0 ) {
+ ptr -= element_size;
+ destructor ( ptr );
+ }
+ exception_guard.release (); // We're good !
+ }
+ cleanup.release (); // We're still good!
+ }
+}
+
+// Given the (data) address of an array, the number of elements, and the
+// size of its elements, call the given destructor on each element. If the
+// destructor throws an exception, call terminate(). The destructor pointer
+// may be NULL, in which case this routine does nothing.
+_LIBCXXABI_FUNC_VIS void __cxa_vec_cleanup(void *array_address,
+ size_t element_count,
+ size_t element_size,
+ void (*destructor)(void *)) {
+ if ( NULL != destructor ) {
+ char *ptr = static_cast <char *> (array_address);
+ size_t idx = element_count;
+ st_terminate exception_guard;
+
+ ptr += element_count * element_size; // one past the last element
+ while ( idx-- > 0 ) {
+ ptr -= element_size;
+ destructor ( ptr );
+ }
+ exception_guard.release (); // We're done!
+ }
+}
+
+
+// If the array_address is NULL, return immediately. Otherwise, given the
+// (data) address of an array, the non-negative size of prefix padding for
+// the cookie, and the size of its elements, call the given destructor on
+// each element, using the cookie to determine the number of elements, and
+// then delete the space by calling ::operator delete[](void *). If the
+// destructor throws an exception, rethrow after (a) destroying the
+// remaining elements, and (b) deallocating the storage. If the destructor
+// throws a second exception, call terminate(). If padding_size is 0, the
+// destructor pointer must be NULL. If the destructor pointer is NULL, no
+// destructor call is to be made.
+//
+// The intent of this function is to permit an implementation to call this
+// function when confronted with an expression of the form delete[] p in
+// the source code, provided that the default deallocation function can be
+// used. Therefore, the semantics of this function are consistent with
+// those required by the standard. The requirement that the deallocation
+// function be called even if the destructor throws an exception derives
+// from the resolution to DR 353 to the C++ standard, which was adopted in
+// April, 2003.
+_LIBCXXABI_FUNC_VIS void __cxa_vec_delete(void *array_address,
+ size_t element_size,
+ size_t padding_size,
+ void (*destructor)(void *)) {
+ __cxa_vec_delete2 ( array_address, element_size, padding_size,
+ destructor, &::operator delete [] );
+}
+
+// Same as __cxa_vec_delete, except that the given function is used for
+// deallocation instead of the default delete function. If dealloc throws
+// an exception, the result is undefined. The dealloc pointer may not be
+// NULL.
+_LIBCXXABI_FUNC_VIS void
+__cxa_vec_delete2(void *array_address, size_t element_size, size_t padding_size,
+ void (*destructor)(void *), void (*dealloc)(void *)) {
+ if ( NULL != array_address ) {
+ char *vec_base = static_cast <char *> (array_address);
+ char *heap_block = vec_base - padding_size;
+ st_heap_block2 heap ( dealloc, heap_block );
+
+ if ( 0 != padding_size && NULL != destructor ) // call the destructors
+ __cxa_vec_dtor ( array_address, __get_element_count ( vec_base ),
+ element_size, destructor );
+ }
+}
+
+
+// Same as __cxa_vec_delete, except that the given function is used for
+// deallocation instead of the default delete function. The deallocation
+// function takes both the object address and its size. If dealloc throws
+// an exception, the result is undefined. The dealloc pointer may not be
+// NULL.
+_LIBCXXABI_FUNC_VIS void
+__cxa_vec_delete3(void *array_address, size_t element_size, size_t padding_size,
+ void (*destructor)(void *), void (*dealloc)(void *, size_t)) {
+ if ( NULL != array_address ) {
+ char *vec_base = static_cast <char *> (array_address);
+ char *heap_block = vec_base - padding_size;
+ const size_t element_count = padding_size ? __get_element_count ( vec_base ) : 0;
+ const size_t heap_block_size = element_size * element_count + padding_size;
+ st_heap_block3 heap ( dealloc, heap_block, heap_block_size );
+
+ if ( 0 != padding_size && NULL != destructor ) // call the destructors
+ __cxa_vec_dtor ( array_address, element_count, element_size, destructor );
+ }
+}
+
+
+} // extern "C"
+
+} // abi
Index: contrib/libcxxabi/src/cxa_virtual.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/cxa_virtual.cpp
@@ -0,0 +1,24 @@
+//===-------------------------- cxa_virtual.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "cxxabi.h"
+#include "abort_message.h"
+
+namespace __cxxabiv1 {
+extern "C" {
+_LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN
+void __cxa_pure_virtual(void) {
+ abort_message("Pure virtual function called!");
+}
+
+_LIBCXXABI_FUNC_VIS _LIBCXXABI_NORETURN
+void __cxa_deleted_virtual(void) {
+ abort_message("Deleted virtual function called!");
+}
+} // extern "C"
+} // abi
Index: contrib/libcxxabi/src/demangle/.clang-format
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/.clang-format
@@ -0,0 +1,2 @@
+BasedOnStyle: LLVM
+
Index: contrib/libcxxabi/src/demangle/DemangleConfig.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/DemangleConfig.h
@@ -0,0 +1,41 @@
+//===--- Compiler.h ---------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// This file is contains a subset of macros copied from
+// llvm/lib/Demangle/Compiler.h.
+//===----------------------------------------------------------------------===//
+
+#ifndef LIBCXX_DEMANGLE_COMPILER_H
+#define LIBCXX_DEMANGLE_COMPILER_H
+
+#include "__config"
+
+#ifdef _MSC_VER
+// snprintf is implemented in VS 2015
+#if _MSC_VER < 1900
+#define snprintf _snprintf_s
+#endif
+#endif
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+#ifndef NDEBUG
+#if __has_attribute(noinline) && __has_attribute(used)
+#define DEMANGLE_DUMP_METHOD __attribute__((noinline, used))
+#else
+#define DEMANGLE_DUMP_METHOD
+#endif
+#endif
+
+#define DEMANGLE_FALLTHROUGH _LIBCPP_FALLTHROUGH()
+#define DEMANGLE_UNREACHABLE _LIBCPP_UNREACHABLE()
+
+#define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle {
+#define DEMANGLE_NAMESPACE_END } }
+
+#endif
Index: contrib/libcxxabi/src/demangle/ItaniumDemangle.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/ItaniumDemangle.h
@@ -0,0 +1,5192 @@
+//===------------------------- ItaniumDemangle.h ----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Generic itanium demangler library. This file has two byte-per-byte identical
+// copies in the source tree, one in libcxxabi, and the other in llvm.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_ITANIUMDEMANGLE_H
+#define DEMANGLE_ITANIUMDEMANGLE_H
+
+// FIXME: (possibly) incomplete list of features that clang mangles that this
+// file does not yet support:
+// - C++ modules TS
+
+#include "DemangleConfig.h"
+#include "StringView.h"
+#include "Utility.h"
+#include <cassert>
+#include <cctype>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <numeric>
+#include <utility>
+
+#define FOR_EACH_NODE_KIND(X) \
+ X(NodeArrayNode) \
+ X(DotSuffix) \
+ X(VendorExtQualType) \
+ X(QualType) \
+ X(ConversionOperatorType) \
+ X(PostfixQualifiedType) \
+ X(ElaboratedTypeSpefType) \
+ X(NameType) \
+ X(AbiTagAttr) \
+ X(EnableIfAttr) \
+ X(ObjCProtoName) \
+ X(PointerType) \
+ X(ReferenceType) \
+ X(PointerToMemberType) \
+ X(ArrayType) \
+ X(FunctionType) \
+ X(NoexceptSpec) \
+ X(DynamicExceptionSpec) \
+ X(FunctionEncoding) \
+ X(LiteralOperator) \
+ X(SpecialName) \
+ X(CtorVtableSpecialName) \
+ X(QualifiedName) \
+ X(NestedName) \
+ X(LocalName) \
+ X(VectorType) \
+ X(PixelVectorType) \
+ X(ParameterPack) \
+ X(TemplateArgumentPack) \
+ X(ParameterPackExpansion) \
+ X(TemplateArgs) \
+ X(ForwardTemplateReference) \
+ X(NameWithTemplateArgs) \
+ X(GlobalQualifiedName) \
+ X(StdQualifiedName) \
+ X(ExpandedSpecialSubstitution) \
+ X(SpecialSubstitution) \
+ X(CtorDtorName) \
+ X(DtorName) \
+ X(UnnamedTypeName) \
+ X(ClosureTypeName) \
+ X(StructuredBindingName) \
+ X(BinaryExpr) \
+ X(ArraySubscriptExpr) \
+ X(PostfixExpr) \
+ X(ConditionalExpr) \
+ X(MemberExpr) \
+ X(EnclosingExpr) \
+ X(CastExpr) \
+ X(SizeofParamPackExpr) \
+ X(CallExpr) \
+ X(NewExpr) \
+ X(DeleteExpr) \
+ X(PrefixExpr) \
+ X(FunctionParam) \
+ X(ConversionExpr) \
+ X(InitListExpr) \
+ X(FoldExpr) \
+ X(ThrowExpr) \
+ X(BoolExpr) \
+ X(IntegerCastExpr) \
+ X(IntegerLiteral) \
+ X(FloatLiteral) \
+ X(DoubleLiteral) \
+ X(LongDoubleLiteral) \
+ X(BracedExpr) \
+ X(BracedRangeExpr)
+
+DEMANGLE_NAMESPACE_BEGIN
+
+// Base class of all AST nodes. The AST is built by the parser, then is
+// traversed by the printLeft/Right functions to produce a demangled string.
+class Node {
+public:
+ enum Kind : unsigned char {
+#define ENUMERATOR(NodeKind) K ## NodeKind,
+ FOR_EACH_NODE_KIND(ENUMERATOR)
+#undef ENUMERATOR
+ };
+
+ /// Three-way bool to track a cached value. Unknown is possible if this node
+ /// has an unexpanded parameter pack below it that may affect this cache.
+ enum class Cache : unsigned char { Yes, No, Unknown, };
+
+private:
+ Kind K;
+
+ // FIXME: Make these protected.
+public:
+ /// Tracks if this node has a component on its right side, in which case we
+ /// need to call printRight.
+ Cache RHSComponentCache;
+
+ /// Track if this node is a (possibly qualified) array type. This can affect
+ /// how we format the output string.
+ Cache ArrayCache;
+
+ /// Track if this node is a (possibly qualified) function type. This can
+ /// affect how we format the output string.
+ Cache FunctionCache;
+
+public:
+ Node(Kind K_, Cache RHSComponentCache_ = Cache::No,
+ Cache ArrayCache_ = Cache::No, Cache FunctionCache_ = Cache::No)
+ : K(K_), RHSComponentCache(RHSComponentCache_), ArrayCache(ArrayCache_),
+ FunctionCache(FunctionCache_) {}
+
+ /// Visit the most-derived object corresponding to this object.
+ template<typename Fn> void visit(Fn F) const;
+
+ // The following function is provided by all derived classes:
+ //
+ // Call F with arguments that, when passed to the constructor of this node,
+ // would construct an equivalent node.
+ //template<typename Fn> void match(Fn F) const;
+
+ bool hasRHSComponent(OutputStream &S) const {
+ if (RHSComponentCache != Cache::Unknown)
+ return RHSComponentCache == Cache::Yes;
+ return hasRHSComponentSlow(S);
+ }
+
+ bool hasArray(OutputStream &S) const {
+ if (ArrayCache != Cache::Unknown)
+ return ArrayCache == Cache::Yes;
+ return hasArraySlow(S);
+ }
+
+ bool hasFunction(OutputStream &S) const {
+ if (FunctionCache != Cache::Unknown)
+ return FunctionCache == Cache::Yes;
+ return hasFunctionSlow(S);
+ }
+
+ Kind getKind() const { return K; }
+
+ virtual bool hasRHSComponentSlow(OutputStream &) const { return false; }
+ virtual bool hasArraySlow(OutputStream &) const { return false; }
+ virtual bool hasFunctionSlow(OutputStream &) const { return false; }
+
+ // Dig through "glue" nodes like ParameterPack and ForwardTemplateReference to
+ // get at a node that actually represents some concrete syntax.
+ virtual const Node *getSyntaxNode(OutputStream &) const {
+ return this;
+ }
+
+ void print(OutputStream &S) const {
+ printLeft(S);
+ if (RHSComponentCache != Cache::No)
+ printRight(S);
+ }
+
+ // Print the "left" side of this Node into OutputStream.
+ virtual void printLeft(OutputStream &) const = 0;
+
+ // Print the "right". This distinction is necessary to represent C++ types
+ // that appear on the RHS of their subtype, such as arrays or functions.
+ // Since most types don't have such a component, provide a default
+ // implementation.
+ virtual void printRight(OutputStream &) const {}
+
+ virtual StringView getBaseName() const { return StringView(); }
+
+ // Silence compiler warnings, this dtor will never be called.
+ virtual ~Node() = default;
+
+#ifndef NDEBUG
+ DEMANGLE_DUMP_METHOD void dump() const;
+#endif
+};
+
+class NodeArray {
+ Node **Elements;
+ size_t NumElements;
+
+public:
+ NodeArray() : Elements(nullptr), NumElements(0) {}
+ NodeArray(Node **Elements_, size_t NumElements_)
+ : Elements(Elements_), NumElements(NumElements_) {}
+
+ bool empty() const { return NumElements == 0; }
+ size_t size() const { return NumElements; }
+
+ Node **begin() const { return Elements; }
+ Node **end() const { return Elements + NumElements; }
+
+ Node *operator[](size_t Idx) const { return Elements[Idx]; }
+
+ void printWithComma(OutputStream &S) const {
+ bool FirstElement = true;
+ for (size_t Idx = 0; Idx != NumElements; ++Idx) {
+ size_t BeforeComma = S.getCurrentPosition();
+ if (!FirstElement)
+ S += ", ";
+ size_t AfterComma = S.getCurrentPosition();
+ Elements[Idx]->print(S);
+
+ // Elements[Idx] is an empty parameter pack expansion, we should erase the
+ // comma we just printed.
+ if (AfterComma == S.getCurrentPosition()) {
+ S.setCurrentPosition(BeforeComma);
+ continue;
+ }
+
+ FirstElement = false;
+ }
+ }
+};
+
+struct NodeArrayNode : Node {
+ NodeArray Array;
+ NodeArrayNode(NodeArray Array_) : Node(KNodeArrayNode), Array(Array_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Array); }
+
+ void printLeft(OutputStream &S) const override {
+ Array.printWithComma(S);
+ }
+};
+
+class DotSuffix final : public Node {
+ const Node *Prefix;
+ const StringView Suffix;
+
+public:
+ DotSuffix(const Node *Prefix_, StringView Suffix_)
+ : Node(KDotSuffix), Prefix(Prefix_), Suffix(Suffix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Suffix); }
+
+ void printLeft(OutputStream &s) const override {
+ Prefix->print(s);
+ s += " (";
+ s += Suffix;
+ s += ")";
+ }
+};
+
+class VendorExtQualType final : public Node {
+ const Node *Ty;
+ StringView Ext;
+
+public:
+ VendorExtQualType(const Node *Ty_, StringView Ext_)
+ : Node(KVendorExtQualType), Ty(Ty_), Ext(Ext_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Ext); }
+
+ void printLeft(OutputStream &S) const override {
+ Ty->print(S);
+ S += " ";
+ S += Ext;
+ }
+};
+
+enum FunctionRefQual : unsigned char {
+ FrefQualNone,
+ FrefQualLValue,
+ FrefQualRValue,
+};
+
+enum Qualifiers {
+ QualNone = 0,
+ QualConst = 0x1,
+ QualVolatile = 0x2,
+ QualRestrict = 0x4,
+};
+
+inline Qualifiers operator|=(Qualifiers &Q1, Qualifiers Q2) {
+ return Q1 = static_cast<Qualifiers>(Q1 | Q2);
+}
+
+class QualType : public Node {
+protected:
+ const Qualifiers Quals;
+ const Node *Child;
+
+ void printQuals(OutputStream &S) const {
+ if (Quals & QualConst)
+ S += " const";
+ if (Quals & QualVolatile)
+ S += " volatile";
+ if (Quals & QualRestrict)
+ S += " restrict";
+ }
+
+public:
+ QualType(const Node *Child_, Qualifiers Quals_)
+ : Node(KQualType, Child_->RHSComponentCache,
+ Child_->ArrayCache, Child_->FunctionCache),
+ Quals(Quals_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child, Quals); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Child->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ return Child->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ return Child->hasFunction(S);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ Child->printLeft(S);
+ printQuals(S);
+ }
+
+ void printRight(OutputStream &S) const override { Child->printRight(S); }
+};
+
+class ConversionOperatorType final : public Node {
+ const Node *Ty;
+
+public:
+ ConversionOperatorType(const Node *Ty_)
+ : Node(KConversionOperatorType), Ty(Ty_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "operator ";
+ Ty->print(S);
+ }
+};
+
+class PostfixQualifiedType final : public Node {
+ const Node *Ty;
+ const StringView Postfix;
+
+public:
+ PostfixQualifiedType(Node *Ty_, StringView Postfix_)
+ : Node(KPostfixQualifiedType), Ty(Ty_), Postfix(Postfix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Postfix); }
+
+ void printLeft(OutputStream &s) const override {
+ Ty->printLeft(s);
+ s += Postfix;
+ }
+};
+
+class NameType final : public Node {
+ const StringView Name;
+
+public:
+ NameType(StringView Name_) : Node(KNameType), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name); }
+
+ StringView getName() const { return Name; }
+ StringView getBaseName() const override { return Name; }
+
+ void printLeft(OutputStream &s) const override { s += Name; }
+};
+
+class ElaboratedTypeSpefType : public Node {
+ StringView Kind;
+ Node *Child;
+public:
+ ElaboratedTypeSpefType(StringView Kind_, Node *Child_)
+ : Node(KElaboratedTypeSpefType), Kind(Kind_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Kind, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Kind;
+ S += ' ';
+ Child->print(S);
+ }
+};
+
+struct AbiTagAttr : Node {
+ Node *Base;
+ StringView Tag;
+
+ AbiTagAttr(Node* Base_, StringView Tag_)
+ : Node(KAbiTagAttr, Base_->RHSComponentCache,
+ Base_->ArrayCache, Base_->FunctionCache),
+ Base(Base_), Tag(Tag_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base, Tag); }
+
+ void printLeft(OutputStream &S) const override {
+ Base->printLeft(S);
+ S += "[abi:";
+ S += Tag;
+ S += "]";
+ }
+};
+
+class EnableIfAttr : public Node {
+ NodeArray Conditions;
+public:
+ EnableIfAttr(NodeArray Conditions_)
+ : Node(KEnableIfAttr), Conditions(Conditions_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Conditions); }
+
+ void printLeft(OutputStream &S) const override {
+ S += " [enable_if:";
+ Conditions.printWithComma(S);
+ S += ']';
+ }
+};
+
+class ObjCProtoName : public Node {
+ const Node *Ty;
+ StringView Protocol;
+
+ friend class PointerType;
+
+public:
+ ObjCProtoName(const Node *Ty_, StringView Protocol_)
+ : Node(KObjCProtoName), Ty(Ty_), Protocol(Protocol_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Protocol); }
+
+ bool isObjCObject() const {
+ return Ty->getKind() == KNameType &&
+ static_cast<const NameType *>(Ty)->getName() == "objc_object";
+ }
+
+ void printLeft(OutputStream &S) const override {
+ Ty->print(S);
+ S += "<";
+ S += Protocol;
+ S += ">";
+ }
+};
+
+class PointerType final : public Node {
+ const Node *Pointee;
+
+public:
+ PointerType(const Node *Pointee_)
+ : Node(KPointerType, Pointee_->RHSComponentCache),
+ Pointee(Pointee_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pointee); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Pointee->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ // We rewrite objc_object<SomeProtocol>* into id<SomeProtocol>.
+ if (Pointee->getKind() != KObjCProtoName ||
+ !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) {
+ Pointee->printLeft(s);
+ if (Pointee->hasArray(s))
+ s += " ";
+ if (Pointee->hasArray(s) || Pointee->hasFunction(s))
+ s += "(";
+ s += "*";
+ } else {
+ const auto *objcProto = static_cast<const ObjCProtoName *>(Pointee);
+ s += "id<";
+ s += objcProto->Protocol;
+ s += ">";
+ }
+ }
+
+ void printRight(OutputStream &s) const override {
+ if (Pointee->getKind() != KObjCProtoName ||
+ !static_cast<const ObjCProtoName *>(Pointee)->isObjCObject()) {
+ if (Pointee->hasArray(s) || Pointee->hasFunction(s))
+ s += ")";
+ Pointee->printRight(s);
+ }
+ }
+};
+
+enum class ReferenceKind {
+ LValue,
+ RValue,
+};
+
+// Represents either a LValue or an RValue reference type.
+class ReferenceType : public Node {
+ const Node *Pointee;
+ ReferenceKind RK;
+
+ mutable bool Printing = false;
+
+ // Dig through any refs to refs, collapsing the ReferenceTypes as we go. The
+ // rule here is rvalue ref to rvalue ref collapses to a rvalue ref, and any
+ // other combination collapses to a lvalue ref.
+ std::pair<ReferenceKind, const Node *> collapse(OutputStream &S) const {
+ auto SoFar = std::make_pair(RK, Pointee);
+ for (;;) {
+ const Node *SN = SoFar.second->getSyntaxNode(S);
+ if (SN->getKind() != KReferenceType)
+ break;
+ auto *RT = static_cast<const ReferenceType *>(SN);
+ SoFar.second = RT->Pointee;
+ SoFar.first = std::min(SoFar.first, RT->RK);
+ }
+ return SoFar;
+ }
+
+public:
+ ReferenceType(const Node *Pointee_, ReferenceKind RK_)
+ : Node(KReferenceType, Pointee_->RHSComponentCache),
+ Pointee(Pointee_), RK(RK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pointee, RK); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return Pointee->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ std::pair<ReferenceKind, const Node *> Collapsed = collapse(s);
+ Collapsed.second->printLeft(s);
+ if (Collapsed.second->hasArray(s))
+ s += " ";
+ if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s))
+ s += "(";
+
+ s += (Collapsed.first == ReferenceKind::LValue ? "&" : "&&");
+ }
+ void printRight(OutputStream &s) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ std::pair<ReferenceKind, const Node *> Collapsed = collapse(s);
+ if (Collapsed.second->hasArray(s) || Collapsed.second->hasFunction(s))
+ s += ")";
+ Collapsed.second->printRight(s);
+ }
+};
+
+class PointerToMemberType final : public Node {
+ const Node *ClassType;
+ const Node *MemberType;
+
+public:
+ PointerToMemberType(const Node *ClassType_, const Node *MemberType_)
+ : Node(KPointerToMemberType, MemberType_->RHSComponentCache),
+ ClassType(ClassType_), MemberType(MemberType_) {}
+
+ template<typename Fn> void match(Fn F) const { F(ClassType, MemberType); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ return MemberType->hasRHSComponent(S);
+ }
+
+ void printLeft(OutputStream &s) const override {
+ MemberType->printLeft(s);
+ if (MemberType->hasArray(s) || MemberType->hasFunction(s))
+ s += "(";
+ else
+ s += " ";
+ ClassType->print(s);
+ s += "::*";
+ }
+
+ void printRight(OutputStream &s) const override {
+ if (MemberType->hasArray(s) || MemberType->hasFunction(s))
+ s += ")";
+ MemberType->printRight(s);
+ }
+};
+
+class NodeOrString {
+ const void *First;
+ const void *Second;
+
+public:
+ /* implicit */ NodeOrString(StringView Str) {
+ const char *FirstChar = Str.begin();
+ const char *SecondChar = Str.end();
+ if (SecondChar == nullptr) {
+ assert(FirstChar == SecondChar);
+ ++FirstChar, ++SecondChar;
+ }
+ First = static_cast<const void *>(FirstChar);
+ Second = static_cast<const void *>(SecondChar);
+ }
+
+ /* implicit */ NodeOrString(Node *N)
+ : First(static_cast<const void *>(N)), Second(nullptr) {}
+ NodeOrString() : First(nullptr), Second(nullptr) {}
+
+ bool isString() const { return Second && First; }
+ bool isNode() const { return First && !Second; }
+ bool isEmpty() const { return !First && !Second; }
+
+ StringView asString() const {
+ assert(isString());
+ return StringView(static_cast<const char *>(First),
+ static_cast<const char *>(Second));
+ }
+
+ const Node *asNode() const {
+ assert(isNode());
+ return static_cast<const Node *>(First);
+ }
+};
+
+class ArrayType final : public Node {
+ const Node *Base;
+ NodeOrString Dimension;
+
+public:
+ ArrayType(const Node *Base_, NodeOrString Dimension_)
+ : Node(KArrayType,
+ /*RHSComponentCache=*/Cache::Yes,
+ /*ArrayCache=*/Cache::Yes),
+ Base(Base_), Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base, Dimension); }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasArraySlow(OutputStream &) const override { return true; }
+
+ void printLeft(OutputStream &S) const override { Base->printLeft(S); }
+
+ void printRight(OutputStream &S) const override {
+ if (S.back() != ']')
+ S += " ";
+ S += "[";
+ if (Dimension.isString())
+ S += Dimension.asString();
+ else if (Dimension.isNode())
+ Dimension.asNode()->print(S);
+ S += "]";
+ Base->printRight(S);
+ }
+};
+
+class FunctionType final : public Node {
+ const Node *Ret;
+ NodeArray Params;
+ Qualifiers CVQuals;
+ FunctionRefQual RefQual;
+ const Node *ExceptionSpec;
+
+public:
+ FunctionType(const Node *Ret_, NodeArray Params_, Qualifiers CVQuals_,
+ FunctionRefQual RefQual_, const Node *ExceptionSpec_)
+ : Node(KFunctionType,
+ /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No,
+ /*FunctionCache=*/Cache::Yes),
+ Ret(Ret_), Params(Params_), CVQuals(CVQuals_), RefQual(RefQual_),
+ ExceptionSpec(ExceptionSpec_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(Ret, Params, CVQuals, RefQual, ExceptionSpec);
+ }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasFunctionSlow(OutputStream &) const override { return true; }
+
+ // Handle C++'s ... quirky decl grammar by using the left & right
+ // distinction. Consider:
+ // int (*f(float))(char) {}
+ // f is a function that takes a float and returns a pointer to a function
+ // that takes a char and returns an int. If we're trying to print f, start
+ // by printing out the return types's left, then print our parameters, then
+ // finally print right of the return type.
+ void printLeft(OutputStream &S) const override {
+ Ret->printLeft(S);
+ S += " ";
+ }
+
+ void printRight(OutputStream &S) const override {
+ S += "(";
+ Params.printWithComma(S);
+ S += ")";
+ Ret->printRight(S);
+
+ if (CVQuals & QualConst)
+ S += " const";
+ if (CVQuals & QualVolatile)
+ S += " volatile";
+ if (CVQuals & QualRestrict)
+ S += " restrict";
+
+ if (RefQual == FrefQualLValue)
+ S += " &";
+ else if (RefQual == FrefQualRValue)
+ S += " &&";
+
+ if (ExceptionSpec != nullptr) {
+ S += ' ';
+ ExceptionSpec->print(S);
+ }
+ }
+};
+
+class NoexceptSpec : public Node {
+ const Node *E;
+public:
+ NoexceptSpec(const Node *E_) : Node(KNoexceptSpec), E(E_) {}
+
+ template<typename Fn> void match(Fn F) const { F(E); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "noexcept(";
+ E->print(S);
+ S += ")";
+ }
+};
+
+class DynamicExceptionSpec : public Node {
+ NodeArray Types;
+public:
+ DynamicExceptionSpec(NodeArray Types_)
+ : Node(KDynamicExceptionSpec), Types(Types_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Types); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "throw(";
+ Types.printWithComma(S);
+ S += ')';
+ }
+};
+
+class FunctionEncoding final : public Node {
+ const Node *Ret;
+ const Node *Name;
+ NodeArray Params;
+ const Node *Attrs;
+ Qualifiers CVQuals;
+ FunctionRefQual RefQual;
+
+public:
+ FunctionEncoding(const Node *Ret_, const Node *Name_, NodeArray Params_,
+ const Node *Attrs_, Qualifiers CVQuals_,
+ FunctionRefQual RefQual_)
+ : Node(KFunctionEncoding,
+ /*RHSComponentCache=*/Cache::Yes, /*ArrayCache=*/Cache::No,
+ /*FunctionCache=*/Cache::Yes),
+ Ret(Ret_), Name(Name_), Params(Params_), Attrs(Attrs_),
+ CVQuals(CVQuals_), RefQual(RefQual_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(Ret, Name, Params, Attrs, CVQuals, RefQual);
+ }
+
+ Qualifiers getCVQuals() const { return CVQuals; }
+ FunctionRefQual getRefQual() const { return RefQual; }
+ NodeArray getParams() const { return Params; }
+ const Node *getReturnType() const { return Ret; }
+
+ bool hasRHSComponentSlow(OutputStream &) const override { return true; }
+ bool hasFunctionSlow(OutputStream &) const override { return true; }
+
+ const Node *getName() const { return Name; }
+
+ void printLeft(OutputStream &S) const override {
+ if (Ret) {
+ Ret->printLeft(S);
+ if (!Ret->hasRHSComponent(S))
+ S += " ";
+ }
+ Name->print(S);
+ }
+
+ void printRight(OutputStream &S) const override {
+ S += "(";
+ Params.printWithComma(S);
+ S += ")";
+ if (Ret)
+ Ret->printRight(S);
+
+ if (CVQuals & QualConst)
+ S += " const";
+ if (CVQuals & QualVolatile)
+ S += " volatile";
+ if (CVQuals & QualRestrict)
+ S += " restrict";
+
+ if (RefQual == FrefQualLValue)
+ S += " &";
+ else if (RefQual == FrefQualRValue)
+ S += " &&";
+
+ if (Attrs != nullptr)
+ Attrs->print(S);
+ }
+};
+
+class LiteralOperator : public Node {
+ const Node *OpName;
+
+public:
+ LiteralOperator(const Node *OpName_)
+ : Node(KLiteralOperator), OpName(OpName_) {}
+
+ template<typename Fn> void match(Fn F) const { F(OpName); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "operator\"\" ";
+ OpName->print(S);
+ }
+};
+
+class SpecialName final : public Node {
+ const StringView Special;
+ const Node *Child;
+
+public:
+ SpecialName(StringView Special_, const Node *Child_)
+ : Node(KSpecialName), Special(Special_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Special, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Special;
+ Child->print(S);
+ }
+};
+
+class CtorVtableSpecialName final : public Node {
+ const Node *FirstType;
+ const Node *SecondType;
+
+public:
+ CtorVtableSpecialName(const Node *FirstType_, const Node *SecondType_)
+ : Node(KCtorVtableSpecialName),
+ FirstType(FirstType_), SecondType(SecondType_) {}
+
+ template<typename Fn> void match(Fn F) const { F(FirstType, SecondType); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "construction vtable for ";
+ FirstType->print(S);
+ S += "-in-";
+ SecondType->print(S);
+ }
+};
+
+struct NestedName : Node {
+ Node *Qual;
+ Node *Name;
+
+ NestedName(Node *Qual_, Node *Name_)
+ : Node(KNestedName), Qual(Qual_), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Qual, Name); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Qual->print(S);
+ S += "::";
+ Name->print(S);
+ }
+};
+
+struct LocalName : Node {
+ Node *Encoding;
+ Node *Entity;
+
+ LocalName(Node *Encoding_, Node *Entity_)
+ : Node(KLocalName), Encoding(Encoding_), Entity(Entity_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Encoding, Entity); }
+
+ void printLeft(OutputStream &S) const override {
+ Encoding->print(S);
+ S += "::";
+ Entity->print(S);
+ }
+};
+
+class QualifiedName final : public Node {
+ // qualifier::name
+ const Node *Qualifier;
+ const Node *Name;
+
+public:
+ QualifiedName(const Node *Qualifier_, const Node *Name_)
+ : Node(KQualifiedName), Qualifier(Qualifier_), Name(Name_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Qualifier, Name); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Qualifier->print(S);
+ S += "::";
+ Name->print(S);
+ }
+};
+
+class VectorType final : public Node {
+ const Node *BaseType;
+ const NodeOrString Dimension;
+
+public:
+ VectorType(const Node *BaseType_, NodeOrString Dimension_)
+ : Node(KVectorType), BaseType(BaseType_),
+ Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(BaseType, Dimension); }
+
+ void printLeft(OutputStream &S) const override {
+ BaseType->print(S);
+ S += " vector[";
+ if (Dimension.isNode())
+ Dimension.asNode()->print(S);
+ else if (Dimension.isString())
+ S += Dimension.asString();
+ S += "]";
+ }
+};
+
+class PixelVectorType final : public Node {
+ const NodeOrString Dimension;
+
+public:
+ PixelVectorType(NodeOrString Dimension_)
+ : Node(KPixelVectorType), Dimension(Dimension_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Dimension); }
+
+ void printLeft(OutputStream &S) const override {
+ // FIXME: This should demangle as "vector pixel".
+ S += "pixel vector[";
+ S += Dimension.asString();
+ S += "]";
+ }
+};
+
+/// An unexpanded parameter pack (either in the expression or type context). If
+/// this AST is correct, this node will have a ParameterPackExpansion node above
+/// it.
+///
+/// This node is created when some <template-args> are found that apply to an
+/// <encoding>, and is stored in the TemplateParams table. In order for this to
+/// appear in the final AST, it has to referenced via a <template-param> (ie,
+/// T_).
+class ParameterPack final : public Node {
+ NodeArray Data;
+
+ // Setup OutputStream for a pack expansion unless we're already expanding one.
+ void initializePackExpansion(OutputStream &S) const {
+ if (S.CurrentPackMax == std::numeric_limits<unsigned>::max()) {
+ S.CurrentPackMax = static_cast<unsigned>(Data.size());
+ S.CurrentPackIndex = 0;
+ }
+ }
+
+public:
+ ParameterPack(NodeArray Data_) : Node(KParameterPack), Data(Data_) {
+ ArrayCache = FunctionCache = RHSComponentCache = Cache::Unknown;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->ArrayCache == Cache::No;
+ }))
+ ArrayCache = Cache::No;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->FunctionCache == Cache::No;
+ }))
+ FunctionCache = Cache::No;
+ if (std::all_of(Data.begin(), Data.end(), [](Node* P) {
+ return P->RHSComponentCache == Cache::No;
+ }))
+ RHSComponentCache = Cache::No;
+ }
+
+ template<typename Fn> void match(Fn F) const { F(Data); }
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() && Data[Idx]->hasFunction(S);
+ }
+ const Node *getSyntaxNode(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ return Idx < Data.size() ? Data[Idx]->getSyntaxNode(S) : this;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ if (Idx < Data.size())
+ Data[Idx]->printLeft(S);
+ }
+ void printRight(OutputStream &S) const override {
+ initializePackExpansion(S);
+ size_t Idx = S.CurrentPackIndex;
+ if (Idx < Data.size())
+ Data[Idx]->printRight(S);
+ }
+};
+
+/// A variadic template argument. This node represents an occurrence of
+/// J<something>E in some <template-args>. It isn't itself unexpanded, unless
+/// one of it's Elements is. The parser inserts a ParameterPack into the
+/// TemplateParams table if the <template-args> this pack belongs to apply to an
+/// <encoding>.
+class TemplateArgumentPack final : public Node {
+ NodeArray Elements;
+public:
+ TemplateArgumentPack(NodeArray Elements_)
+ : Node(KTemplateArgumentPack), Elements(Elements_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Elements); }
+
+ NodeArray getElements() const { return Elements; }
+
+ void printLeft(OutputStream &S) const override {
+ Elements.printWithComma(S);
+ }
+};
+
+/// A pack expansion. Below this node, there are some unexpanded ParameterPacks
+/// which each have Child->ParameterPackSize elements.
+class ParameterPackExpansion final : public Node {
+ const Node *Child;
+
+public:
+ ParameterPackExpansion(const Node *Child_)
+ : Node(KParameterPackExpansion), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ const Node *getChild() const { return Child; }
+
+ void printLeft(OutputStream &S) const override {
+ constexpr unsigned Max = std::numeric_limits<unsigned>::max();
+ SwapAndRestore<unsigned> SavePackIdx(S.CurrentPackIndex, Max);
+ SwapAndRestore<unsigned> SavePackMax(S.CurrentPackMax, Max);
+ size_t StreamPos = S.getCurrentPosition();
+
+ // Print the first element in the pack. If Child contains a ParameterPack,
+ // it will set up S.CurrentPackMax and print the first element.
+ Child->print(S);
+
+ // No ParameterPack was found in Child. This can occur if we've found a pack
+ // expansion on a <function-param>.
+ if (S.CurrentPackMax == Max) {
+ S += "...";
+ return;
+ }
+
+ // We found a ParameterPack, but it has no elements. Erase whatever we may
+ // of printed.
+ if (S.CurrentPackMax == 0) {
+ S.setCurrentPosition(StreamPos);
+ return;
+ }
+
+ // Else, iterate through the rest of the elements in the pack.
+ for (unsigned I = 1, E = S.CurrentPackMax; I < E; ++I) {
+ S += ", ";
+ S.CurrentPackIndex = I;
+ Child->print(S);
+ }
+ }
+};
+
+class TemplateArgs final : public Node {
+ NodeArray Params;
+
+public:
+ TemplateArgs(NodeArray Params_) : Node(KTemplateArgs), Params(Params_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Params); }
+
+ NodeArray getParams() { return Params; }
+
+ void printLeft(OutputStream &S) const override {
+ S += "<";
+ Params.printWithComma(S);
+ if (S.back() == '>')
+ S += " ";
+ S += ">";
+ }
+};
+
+/// A forward-reference to a template argument that was not known at the point
+/// where the template parameter name was parsed in a mangling.
+///
+/// This is created when demangling the name of a specialization of a
+/// conversion function template:
+///
+/// \code
+/// struct A {
+/// template<typename T> operator T*();
+/// };
+/// \endcode
+///
+/// When demangling a specialization of the conversion function template, we
+/// encounter the name of the template (including the \c T) before we reach
+/// the template argument list, so we cannot substitute the parameter name
+/// for the corresponding argument while parsing. Instead, we create a
+/// \c ForwardTemplateReference node that is resolved after we parse the
+/// template arguments.
+struct ForwardTemplateReference : Node {
+ size_t Index;
+ Node *Ref = nullptr;
+
+ // If we're currently printing this node. It is possible (though invalid) for
+ // a forward template reference to refer to itself via a substitution. This
+ // creates a cyclic AST, which will stack overflow printing. To fix this, bail
+ // out if more than one print* function is active.
+ mutable bool Printing = false;
+
+ ForwardTemplateReference(size_t Index_)
+ : Node(KForwardTemplateReference, Cache::Unknown, Cache::Unknown,
+ Cache::Unknown),
+ Index(Index_) {}
+
+ // We don't provide a matcher for these, because the value of the node is
+ // not determined by its construction parameters, and it generally needs
+ // special handling.
+ template<typename Fn> void match(Fn F) const = delete;
+
+ bool hasRHSComponentSlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasRHSComponent(S);
+ }
+ bool hasArraySlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasArray(S);
+ }
+ bool hasFunctionSlow(OutputStream &S) const override {
+ if (Printing)
+ return false;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->hasFunction(S);
+ }
+ const Node *getSyntaxNode(OutputStream &S) const override {
+ if (Printing)
+ return this;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ return Ref->getSyntaxNode(S);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ Ref->printLeft(S);
+ }
+ void printRight(OutputStream &S) const override {
+ if (Printing)
+ return;
+ SwapAndRestore<bool> SavePrinting(Printing, true);
+ Ref->printRight(S);
+ }
+};
+
+struct NameWithTemplateArgs : Node {
+ // name<template_args>
+ Node *Name;
+ Node *TemplateArgs;
+
+ NameWithTemplateArgs(Node *Name_, Node *TemplateArgs_)
+ : Node(KNameWithTemplateArgs), Name(Name_), TemplateArgs(TemplateArgs_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Name, TemplateArgs); }
+
+ StringView getBaseName() const override { return Name->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ Name->print(S);
+ TemplateArgs->print(S);
+ }
+};
+
+class GlobalQualifiedName final : public Node {
+ Node *Child;
+
+public:
+ GlobalQualifiedName(Node* Child_)
+ : Node(KGlobalQualifiedName), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ StringView getBaseName() const override { return Child->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "::";
+ Child->print(S);
+ }
+};
+
+struct StdQualifiedName : Node {
+ Node *Child;
+
+ StdQualifiedName(Node *Child_) : Node(KStdQualifiedName), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child); }
+
+ StringView getBaseName() const override { return Child->getBaseName(); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "std::";
+ Child->print(S);
+ }
+};
+
+enum class SpecialSubKind {
+ allocator,
+ basic_string,
+ string,
+ istream,
+ ostream,
+ iostream,
+};
+
+class ExpandedSpecialSubstitution final : public Node {
+ SpecialSubKind SSK;
+
+public:
+ ExpandedSpecialSubstitution(SpecialSubKind SSK_)
+ : Node(KExpandedSpecialSubstitution), SSK(SSK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(SSK); }
+
+ StringView getBaseName() const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return StringView("allocator");
+ case SpecialSubKind::basic_string:
+ return StringView("basic_string");
+ case SpecialSubKind::string:
+ return StringView("basic_string");
+ case SpecialSubKind::istream:
+ return StringView("basic_istream");
+ case SpecialSubKind::ostream:
+ return StringView("basic_ostream");
+ case SpecialSubKind::iostream:
+ return StringView("basic_iostream");
+ }
+ DEMANGLE_UNREACHABLE;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ S += "std::allocator";
+ break;
+ case SpecialSubKind::basic_string:
+ S += "std::basic_string";
+ break;
+ case SpecialSubKind::string:
+ S += "std::basic_string<char, std::char_traits<char>, "
+ "std::allocator<char> >";
+ break;
+ case SpecialSubKind::istream:
+ S += "std::basic_istream<char, std::char_traits<char> >";
+ break;
+ case SpecialSubKind::ostream:
+ S += "std::basic_ostream<char, std::char_traits<char> >";
+ break;
+ case SpecialSubKind::iostream:
+ S += "std::basic_iostream<char, std::char_traits<char> >";
+ break;
+ }
+ }
+};
+
+class SpecialSubstitution final : public Node {
+public:
+ SpecialSubKind SSK;
+
+ SpecialSubstitution(SpecialSubKind SSK_)
+ : Node(KSpecialSubstitution), SSK(SSK_) {}
+
+ template<typename Fn> void match(Fn F) const { F(SSK); }
+
+ StringView getBaseName() const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ return StringView("allocator");
+ case SpecialSubKind::basic_string:
+ return StringView("basic_string");
+ case SpecialSubKind::string:
+ return StringView("string");
+ case SpecialSubKind::istream:
+ return StringView("istream");
+ case SpecialSubKind::ostream:
+ return StringView("ostream");
+ case SpecialSubKind::iostream:
+ return StringView("iostream");
+ }
+ DEMANGLE_UNREACHABLE;
+ }
+
+ void printLeft(OutputStream &S) const override {
+ switch (SSK) {
+ case SpecialSubKind::allocator:
+ S += "std::allocator";
+ break;
+ case SpecialSubKind::basic_string:
+ S += "std::basic_string";
+ break;
+ case SpecialSubKind::string:
+ S += "std::string";
+ break;
+ case SpecialSubKind::istream:
+ S += "std::istream";
+ break;
+ case SpecialSubKind::ostream:
+ S += "std::ostream";
+ break;
+ case SpecialSubKind::iostream:
+ S += "std::iostream";
+ break;
+ }
+ }
+};
+
+class CtorDtorName final : public Node {
+ const Node *Basename;
+ const bool IsDtor;
+ const int Variant;
+
+public:
+ CtorDtorName(const Node *Basename_, bool IsDtor_, int Variant_)
+ : Node(KCtorDtorName), Basename(Basename_), IsDtor(IsDtor_),
+ Variant(Variant_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Basename, IsDtor, Variant); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsDtor)
+ S += "~";
+ S += Basename->getBaseName();
+ }
+};
+
+class DtorName : public Node {
+ const Node *Base;
+
+public:
+ DtorName(const Node *Base_) : Node(KDtorName), Base(Base_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Base); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "~";
+ Base->printLeft(S);
+ }
+};
+
+class UnnamedTypeName : public Node {
+ const StringView Count;
+
+public:
+ UnnamedTypeName(StringView Count_) : Node(KUnnamedTypeName), Count(Count_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Count); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "'unnamed";
+ S += Count;
+ S += "\'";
+ }
+};
+
+class ClosureTypeName : public Node {
+ NodeArray Params;
+ StringView Count;
+
+public:
+ ClosureTypeName(NodeArray Params_, StringView Count_)
+ : Node(KClosureTypeName), Params(Params_), Count(Count_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Params, Count); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "\'lambda";
+ S += Count;
+ S += "\'(";
+ Params.printWithComma(S);
+ S += ")";
+ }
+};
+
+class StructuredBindingName : public Node {
+ NodeArray Bindings;
+public:
+ StructuredBindingName(NodeArray Bindings_)
+ : Node(KStructuredBindingName), Bindings(Bindings_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Bindings); }
+
+ void printLeft(OutputStream &S) const override {
+ S += '[';
+ Bindings.printWithComma(S);
+ S += ']';
+ }
+};
+
+// -- Expression Nodes --
+
+class BinaryExpr : public Node {
+ const Node *LHS;
+ const StringView InfixOperator;
+ const Node *RHS;
+
+public:
+ BinaryExpr(const Node *LHS_, StringView InfixOperator_, const Node *RHS_)
+ : Node(KBinaryExpr), LHS(LHS_), InfixOperator(InfixOperator_), RHS(RHS_) {
+ }
+
+ template<typename Fn> void match(Fn F) const { F(LHS, InfixOperator, RHS); }
+
+ void printLeft(OutputStream &S) const override {
+ // might be a template argument expression, then we need to disambiguate
+ // with parens.
+ if (InfixOperator == ">")
+ S += "(";
+
+ S += "(";
+ LHS->print(S);
+ S += ") ";
+ S += InfixOperator;
+ S += " (";
+ RHS->print(S);
+ S += ")";
+
+ if (InfixOperator == ">")
+ S += ")";
+ }
+};
+
+class ArraySubscriptExpr : public Node {
+ const Node *Op1;
+ const Node *Op2;
+
+public:
+ ArraySubscriptExpr(const Node *Op1_, const Node *Op2_)
+ : Node(KArraySubscriptExpr), Op1(Op1_), Op2(Op2_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op1, Op2); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Op1->print(S);
+ S += ")[";
+ Op2->print(S);
+ S += "]";
+ }
+};
+
+class PostfixExpr : public Node {
+ const Node *Child;
+ const StringView Operator;
+
+public:
+ PostfixExpr(const Node *Child_, StringView Operator_)
+ : Node(KPostfixExpr), Child(Child_), Operator(Operator_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Child, Operator); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Child->print(S);
+ S += ")";
+ S += Operator;
+ }
+};
+
+class ConditionalExpr : public Node {
+ const Node *Cond;
+ const Node *Then;
+ const Node *Else;
+
+public:
+ ConditionalExpr(const Node *Cond_, const Node *Then_, const Node *Else_)
+ : Node(KConditionalExpr), Cond(Cond_), Then(Then_), Else(Else_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Cond, Then, Else); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Cond->print(S);
+ S += ") ? (";
+ Then->print(S);
+ S += ") : (";
+ Else->print(S);
+ S += ")";
+ }
+};
+
+class MemberExpr : public Node {
+ const Node *LHS;
+ const StringView Kind;
+ const Node *RHS;
+
+public:
+ MemberExpr(const Node *LHS_, StringView Kind_, const Node *RHS_)
+ : Node(KMemberExpr), LHS(LHS_), Kind(Kind_), RHS(RHS_) {}
+
+ template<typename Fn> void match(Fn F) const { F(LHS, Kind, RHS); }
+
+ void printLeft(OutputStream &S) const override {
+ LHS->print(S);
+ S += Kind;
+ RHS->print(S);
+ }
+};
+
+class EnclosingExpr : public Node {
+ const StringView Prefix;
+ const Node *Infix;
+ const StringView Postfix;
+
+public:
+ EnclosingExpr(StringView Prefix_, Node *Infix_, StringView Postfix_)
+ : Node(KEnclosingExpr), Prefix(Prefix_), Infix(Infix_),
+ Postfix(Postfix_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Infix, Postfix); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Prefix;
+ Infix->print(S);
+ S += Postfix;
+ }
+};
+
+class CastExpr : public Node {
+ // cast_kind<to>(from)
+ const StringView CastKind;
+ const Node *To;
+ const Node *From;
+
+public:
+ CastExpr(StringView CastKind_, const Node *To_, const Node *From_)
+ : Node(KCastExpr), CastKind(CastKind_), To(To_), From(From_) {}
+
+ template<typename Fn> void match(Fn F) const { F(CastKind, To, From); }
+
+ void printLeft(OutputStream &S) const override {
+ S += CastKind;
+ S += "<";
+ To->printLeft(S);
+ S += ">(";
+ From->printLeft(S);
+ S += ")";
+ }
+};
+
+class SizeofParamPackExpr : public Node {
+ const Node *Pack;
+
+public:
+ SizeofParamPackExpr(const Node *Pack_)
+ : Node(KSizeofParamPackExpr), Pack(Pack_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Pack); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "sizeof...(";
+ ParameterPackExpansion PPE(Pack);
+ PPE.printLeft(S);
+ S += ")";
+ }
+};
+
+class CallExpr : public Node {
+ const Node *Callee;
+ NodeArray Args;
+
+public:
+ CallExpr(const Node *Callee_, NodeArray Args_)
+ : Node(KCallExpr), Callee(Callee_), Args(Args_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Callee, Args); }
+
+ void printLeft(OutputStream &S) const override {
+ Callee->print(S);
+ S += "(";
+ Args.printWithComma(S);
+ S += ")";
+ }
+};
+
+class NewExpr : public Node {
+ // new (expr_list) type(init_list)
+ NodeArray ExprList;
+ Node *Type;
+ NodeArray InitList;
+ bool IsGlobal; // ::operator new ?
+ bool IsArray; // new[] ?
+public:
+ NewExpr(NodeArray ExprList_, Node *Type_, NodeArray InitList_, bool IsGlobal_,
+ bool IsArray_)
+ : Node(KNewExpr), ExprList(ExprList_), Type(Type_), InitList(InitList_),
+ IsGlobal(IsGlobal_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(ExprList, Type, InitList, IsGlobal, IsArray);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsGlobal)
+ S += "::operator ";
+ S += "new";
+ if (IsArray)
+ S += "[]";
+ S += ' ';
+ if (!ExprList.empty()) {
+ S += "(";
+ ExprList.printWithComma(S);
+ S += ")";
+ }
+ Type->print(S);
+ if (!InitList.empty()) {
+ S += "(";
+ InitList.printWithComma(S);
+ S += ")";
+ }
+
+ }
+};
+
+class DeleteExpr : public Node {
+ Node *Op;
+ bool IsGlobal;
+ bool IsArray;
+
+public:
+ DeleteExpr(Node *Op_, bool IsGlobal_, bool IsArray_)
+ : Node(KDeleteExpr), Op(Op_), IsGlobal(IsGlobal_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op, IsGlobal, IsArray); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsGlobal)
+ S += "::";
+ S += "delete";
+ if (IsArray)
+ S += "[] ";
+ Op->print(S);
+ }
+};
+
+class PrefixExpr : public Node {
+ StringView Prefix;
+ Node *Child;
+
+public:
+ PrefixExpr(StringView Prefix_, Node *Child_)
+ : Node(KPrefixExpr), Prefix(Prefix_), Child(Child_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Prefix, Child); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Prefix;
+ S += "(";
+ Child->print(S);
+ S += ")";
+ }
+};
+
+class FunctionParam : public Node {
+ StringView Number;
+
+public:
+ FunctionParam(StringView Number_) : Node(KFunctionParam), Number(Number_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Number); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "fp";
+ S += Number;
+ }
+};
+
+class ConversionExpr : public Node {
+ const Node *Type;
+ NodeArray Expressions;
+
+public:
+ ConversionExpr(const Node *Type_, NodeArray Expressions_)
+ : Node(KConversionExpr), Type(Type_), Expressions(Expressions_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type, Expressions); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Type->print(S);
+ S += ")(";
+ Expressions.printWithComma(S);
+ S += ")";
+ }
+};
+
+class InitListExpr : public Node {
+ const Node *Ty;
+ NodeArray Inits;
+public:
+ InitListExpr(const Node *Ty_, NodeArray Inits_)
+ : Node(KInitListExpr), Ty(Ty_), Inits(Inits_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Inits); }
+
+ void printLeft(OutputStream &S) const override {
+ if (Ty)
+ Ty->print(S);
+ S += '{';
+ Inits.printWithComma(S);
+ S += '}';
+ }
+};
+
+class BracedExpr : public Node {
+ const Node *Elem;
+ const Node *Init;
+ bool IsArray;
+public:
+ BracedExpr(const Node *Elem_, const Node *Init_, bool IsArray_)
+ : Node(KBracedExpr), Elem(Elem_), Init(Init_), IsArray(IsArray_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Elem, Init, IsArray); }
+
+ void printLeft(OutputStream &S) const override {
+ if (IsArray) {
+ S += '[';
+ Elem->print(S);
+ S += ']';
+ } else {
+ S += '.';
+ Elem->print(S);
+ }
+ if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr)
+ S += " = ";
+ Init->print(S);
+ }
+};
+
+class BracedRangeExpr : public Node {
+ const Node *First;
+ const Node *Last;
+ const Node *Init;
+public:
+ BracedRangeExpr(const Node *First_, const Node *Last_, const Node *Init_)
+ : Node(KBracedRangeExpr), First(First_), Last(Last_), Init(Init_) {}
+
+ template<typename Fn> void match(Fn F) const { F(First, Last, Init); }
+
+ void printLeft(OutputStream &S) const override {
+ S += '[';
+ First->print(S);
+ S += " ... ";
+ Last->print(S);
+ S += ']';
+ if (Init->getKind() != KBracedExpr && Init->getKind() != KBracedRangeExpr)
+ S += " = ";
+ Init->print(S);
+ }
+};
+
+class FoldExpr : public Node {
+ const Node *Pack, *Init;
+ StringView OperatorName;
+ bool IsLeftFold;
+
+public:
+ FoldExpr(bool IsLeftFold_, StringView OperatorName_, const Node *Pack_,
+ const Node *Init_)
+ : Node(KFoldExpr), Pack(Pack_), Init(Init_), OperatorName(OperatorName_),
+ IsLeftFold(IsLeftFold_) {}
+
+ template<typename Fn> void match(Fn F) const {
+ F(IsLeftFold, OperatorName, Pack, Init);
+ }
+
+ void printLeft(OutputStream &S) const override {
+ auto PrintPack = [&] {
+ S += '(';
+ ParameterPackExpansion(Pack).print(S);
+ S += ')';
+ };
+
+ S += '(';
+
+ if (IsLeftFold) {
+ // init op ... op pack
+ if (Init != nullptr) {
+ Init->print(S);
+ S += ' ';
+ S += OperatorName;
+ S += ' ';
+ }
+ // ... op pack
+ S += "... ";
+ S += OperatorName;
+ S += ' ';
+ PrintPack();
+ } else { // !IsLeftFold
+ // pack op ...
+ PrintPack();
+ S += ' ';
+ S += OperatorName;
+ S += " ...";
+ // pack op ... op init
+ if (Init != nullptr) {
+ S += ' ';
+ S += OperatorName;
+ S += ' ';
+ Init->print(S);
+ }
+ }
+ S += ')';
+ }
+};
+
+class ThrowExpr : public Node {
+ const Node *Op;
+
+public:
+ ThrowExpr(const Node *Op_) : Node(KThrowExpr), Op(Op_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Op); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "throw ";
+ Op->print(S);
+ }
+};
+
+class BoolExpr : public Node {
+ bool Value;
+
+public:
+ BoolExpr(bool Value_) : Node(KBoolExpr), Value(Value_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Value); }
+
+ void printLeft(OutputStream &S) const override {
+ S += Value ? StringView("true") : StringView("false");
+ }
+};
+
+class IntegerCastExpr : public Node {
+ // ty(integer)
+ const Node *Ty;
+ StringView Integer;
+
+public:
+ IntegerCastExpr(const Node *Ty_, StringView Integer_)
+ : Node(KIntegerCastExpr), Ty(Ty_), Integer(Integer_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Ty, Integer); }
+
+ void printLeft(OutputStream &S) const override {
+ S += "(";
+ Ty->print(S);
+ S += ")";
+ S += Integer;
+ }
+};
+
+class IntegerLiteral : public Node {
+ StringView Type;
+ StringView Value;
+
+public:
+ IntegerLiteral(StringView Type_, StringView Value_)
+ : Node(KIntegerLiteral), Type(Type_), Value(Value_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Type, Value); }
+
+ void printLeft(OutputStream &S) const override {
+ if (Type.size() > 3) {
+ S += "(";
+ S += Type;
+ S += ")";
+ }
+
+ if (Value[0] == 'n') {
+ S += "-";
+ S += Value.dropFront(1);
+ } else
+ S += Value;
+
+ if (Type.size() <= 3)
+ S += Type;
+ }
+};
+
+template <class Float> struct FloatData;
+
+namespace float_literal_impl {
+constexpr Node::Kind getFloatLiteralKind(float *) {
+ return Node::KFloatLiteral;
+}
+constexpr Node::Kind getFloatLiteralKind(double *) {
+ return Node::KDoubleLiteral;
+}
+constexpr Node::Kind getFloatLiteralKind(long double *) {
+ return Node::KLongDoubleLiteral;
+}
+}
+
+template <class Float> class FloatLiteralImpl : public Node {
+ const StringView Contents;
+
+ static constexpr Kind KindForClass =
+ float_literal_impl::getFloatLiteralKind((Float *)nullptr);
+
+public:
+ FloatLiteralImpl(StringView Contents_)
+ : Node(KindForClass), Contents(Contents_) {}
+
+ template<typename Fn> void match(Fn F) const { F(Contents); }
+
+ void printLeft(OutputStream &s) const override {
+ const char *first = Contents.begin();
+ const char *last = Contents.end() + 1;
+
+ const size_t N = FloatData<Float>::mangled_size;
+ if (static_cast<std::size_t>(last - first) > N) {
+ last = first + N;
+ union {
+ Float value;
+ char buf[sizeof(Float)];
+ };
+ const char *t = first;
+ char *e = buf;
+ for (; t != last; ++t, ++e) {
+ unsigned d1 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
+ : static_cast<unsigned>(*t - 'a' + 10);
+ ++t;
+ unsigned d0 = isdigit(*t) ? static_cast<unsigned>(*t - '0')
+ : static_cast<unsigned>(*t - 'a' + 10);
+ *e = static_cast<char>((d1 << 4) + d0);
+ }
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+ std::reverse(buf, e);
+#endif
+ char num[FloatData<Float>::max_demangled_size] = {0};
+ int n = snprintf(num, sizeof(num), FloatData<Float>::spec, value);
+ s += StringView(num, num + n);
+ }
+ }
+};
+
+using FloatLiteral = FloatLiteralImpl<float>;
+using DoubleLiteral = FloatLiteralImpl<double>;
+using LongDoubleLiteral = FloatLiteralImpl<long double>;
+
+/// Visit the node. Calls \c F(P), where \c P is the node cast to the
+/// appropriate derived class.
+template<typename Fn>
+void Node::visit(Fn F) const {
+ switch (K) {
+#define CASE(X) case K ## X: return F(static_cast<const X*>(this));
+ FOR_EACH_NODE_KIND(CASE)
+#undef CASE
+ }
+ assert(0 && "unknown mangling node kind");
+}
+
+/// Determine the kind of a node from its type.
+template<typename NodeT> struct NodeKind;
+#define SPECIALIZATION(X) \
+ template<> struct NodeKind<X> { \
+ static constexpr Node::Kind Kind = Node::K##X; \
+ static constexpr const char *name() { return #X; } \
+ };
+FOR_EACH_NODE_KIND(SPECIALIZATION)
+#undef SPECIALIZATION
+
+#undef FOR_EACH_NODE_KIND
+
+template <class T, size_t N>
+class PODSmallVector {
+ static_assert(std::is_pod<T>::value,
+ "T is required to be a plain old data type");
+
+ T* First;
+ T* Last;
+ T* Cap;
+ T Inline[N];
+
+ bool isInline() const { return First == Inline; }
+
+ void clearInline() {
+ First = Inline;
+ Last = Inline;
+ Cap = Inline + N;
+ }
+
+ void reserve(size_t NewCap) {
+ size_t S = size();
+ if (isInline()) {
+ auto* Tmp = static_cast<T*>(std::malloc(NewCap * sizeof(T)));
+ if (Tmp == nullptr)
+ std::terminate();
+ std::copy(First, Last, Tmp);
+ First = Tmp;
+ } else {
+ First = static_cast<T*>(std::realloc(First, NewCap * sizeof(T)));
+ if (First == nullptr)
+ std::terminate();
+ }
+ Last = First + S;
+ Cap = First + NewCap;
+ }
+
+public:
+ PODSmallVector() : First(Inline), Last(First), Cap(Inline + N) {}
+
+ PODSmallVector(const PODSmallVector&) = delete;
+ PODSmallVector& operator=(const PODSmallVector&) = delete;
+
+ PODSmallVector(PODSmallVector&& Other) : PODSmallVector() {
+ if (Other.isInline()) {
+ std::copy(Other.begin(), Other.end(), First);
+ Last = First + Other.size();
+ Other.clear();
+ return;
+ }
+
+ First = Other.First;
+ Last = Other.Last;
+ Cap = Other.Cap;
+ Other.clearInline();
+ }
+
+ PODSmallVector& operator=(PODSmallVector&& Other) {
+ if (Other.isInline()) {
+ if (!isInline()) {
+ std::free(First);
+ clearInline();
+ }
+ std::copy(Other.begin(), Other.end(), First);
+ Last = First + Other.size();
+ Other.clear();
+ return *this;
+ }
+
+ if (isInline()) {
+ First = Other.First;
+ Last = Other.Last;
+ Cap = Other.Cap;
+ Other.clearInline();
+ return *this;
+ }
+
+ std::swap(First, Other.First);
+ std::swap(Last, Other.Last);
+ std::swap(Cap, Other.Cap);
+ Other.clear();
+ return *this;
+ }
+
+ void push_back(const T& Elem) {
+ if (Last == Cap)
+ reserve(size() * 2);
+ *Last++ = Elem;
+ }
+
+ void pop_back() {
+ assert(Last != First && "Popping empty vector!");
+ --Last;
+ }
+
+ void dropBack(size_t Index) {
+ assert(Index <= size() && "dropBack() can't expand!");
+ Last = First + Index;
+ }
+
+ T* begin() { return First; }
+ T* end() { return Last; }
+
+ bool empty() const { return First == Last; }
+ size_t size() const { return static_cast<size_t>(Last - First); }
+ T& back() {
+ assert(Last != First && "Calling back() on empty vector!");
+ return *(Last - 1);
+ }
+ T& operator[](size_t Index) {
+ assert(Index < size() && "Invalid access!");
+ return *(begin() + Index);
+ }
+ void clear() { Last = First; }
+
+ ~PODSmallVector() {
+ if (!isInline())
+ std::free(First);
+ }
+};
+
+template <typename Derived, typename Alloc> struct AbstractManglingParser {
+ const char *First;
+ const char *Last;
+
+ // Name stack, this is used by the parser to hold temporary names that were
+ // parsed. The parser collapses multiple names into new nodes to construct
+ // the AST. Once the parser is finished, names.size() == 1.
+ PODSmallVector<Node *, 32> Names;
+
+ // Substitution table. Itanium supports name substitutions as a means of
+ // compression. The string "S42_" refers to the 44nd entry (base-36) in this
+ // table.
+ PODSmallVector<Node *, 32> Subs;
+
+ // Template parameter table. Like the above, but referenced like "T42_".
+ // This has a smaller size compared to Subs and Names because it can be
+ // stored on the stack.
+ PODSmallVector<Node *, 8> TemplateParams;
+
+ // Set of unresolved forward <template-param> references. These can occur in a
+ // conversion operator's type, and are resolved in the enclosing <encoding>.
+ PODSmallVector<ForwardTemplateReference *, 4> ForwardTemplateRefs;
+
+ bool TryToParseTemplateArgs = true;
+ bool PermitForwardTemplateReferences = false;
+ bool ParsingLambdaParams = false;
+
+ Alloc ASTAllocator;
+
+ AbstractManglingParser(const char *First_, const char *Last_)
+ : First(First_), Last(Last_) {}
+
+ Derived &getDerived() { return static_cast<Derived &>(*this); }
+
+ void reset(const char *First_, const char *Last_) {
+ First = First_;
+ Last = Last_;
+ Names.clear();
+ Subs.clear();
+ TemplateParams.clear();
+ ParsingLambdaParams = false;
+ TryToParseTemplateArgs = true;
+ PermitForwardTemplateReferences = false;
+ ASTAllocator.reset();
+ }
+
+ template <class T, class... Args> Node *make(Args &&... args) {
+ return ASTAllocator.template makeNode<T>(std::forward<Args>(args)...);
+ }
+
+ template <class It> NodeArray makeNodeArray(It begin, It end) {
+ size_t sz = static_cast<size_t>(end - begin);
+ void *mem = ASTAllocator.allocateNodeArray(sz);
+ Node **data = new (mem) Node *[sz];
+ std::copy(begin, end, data);
+ return NodeArray(data, sz);
+ }
+
+ NodeArray popTrailingNodeArray(size_t FromPosition) {
+ assert(FromPosition <= Names.size());
+ NodeArray res =
+ makeNodeArray(Names.begin() + (long)FromPosition, Names.end());
+ Names.dropBack(FromPosition);
+ return res;
+ }
+
+ bool consumeIf(StringView S) {
+ if (StringView(First, Last).startsWith(S)) {
+ First += S.size();
+ return true;
+ }
+ return false;
+ }
+
+ bool consumeIf(char C) {
+ if (First != Last && *First == C) {
+ ++First;
+ return true;
+ }
+ return false;
+ }
+
+ char consume() { return First != Last ? *First++ : '\0'; }
+
+ char look(unsigned Lookahead = 0) {
+ if (static_cast<size_t>(Last - First) <= Lookahead)
+ return '\0';
+ return First[Lookahead];
+ }
+
+ size_t numLeft() const { return static_cast<size_t>(Last - First); }
+
+ StringView parseNumber(bool AllowNegative = false);
+ Qualifiers parseCVQualifiers();
+ bool parsePositiveInteger(size_t *Out);
+ StringView parseBareSourceName();
+
+ bool parseSeqId(size_t *Out);
+ Node *parseSubstitution();
+ Node *parseTemplateParam();
+ Node *parseTemplateArgs(bool TagTemplates = false);
+ Node *parseTemplateArg();
+
+ /// Parse the <expr> production.
+ Node *parseExpr();
+ Node *parsePrefixExpr(StringView Kind);
+ Node *parseBinaryExpr(StringView Kind);
+ Node *parseIntegerLiteral(StringView Lit);
+ Node *parseExprPrimary();
+ template <class Float> Node *parseFloatingLiteral();
+ Node *parseFunctionParam();
+ Node *parseNewExpr();
+ Node *parseConversionExpr();
+ Node *parseBracedExpr();
+ Node *parseFoldExpr();
+
+ /// Parse the <type> production.
+ Node *parseType();
+ Node *parseFunctionType();
+ Node *parseVectorType();
+ Node *parseDecltype();
+ Node *parseArrayType();
+ Node *parsePointerToMemberType();
+ Node *parseClassEnumType();
+ Node *parseQualifiedType();
+
+ Node *parseEncoding();
+ bool parseCallOffset();
+ Node *parseSpecialName();
+
+ /// Holds some extra information about a <name> that is being parsed. This
+ /// information is only pertinent if the <name> refers to an <encoding>.
+ struct NameState {
+ bool CtorDtorConversion = false;
+ bool EndsWithTemplateArgs = false;
+ Qualifiers CVQualifiers = QualNone;
+ FunctionRefQual ReferenceQualifier = FrefQualNone;
+ size_t ForwardTemplateRefsBegin;
+
+ NameState(AbstractManglingParser *Enclosing)
+ : ForwardTemplateRefsBegin(Enclosing->ForwardTemplateRefs.size()) {}
+ };
+
+ bool resolveForwardTemplateRefs(NameState &State) {
+ size_t I = State.ForwardTemplateRefsBegin;
+ size_t E = ForwardTemplateRefs.size();
+ for (; I < E; ++I) {
+ size_t Idx = ForwardTemplateRefs[I]->Index;
+ if (Idx >= TemplateParams.size())
+ return true;
+ ForwardTemplateRefs[I]->Ref = TemplateParams[Idx];
+ }
+ ForwardTemplateRefs.dropBack(State.ForwardTemplateRefsBegin);
+ return false;
+ }
+
+ /// Parse the <name> production>
+ Node *parseName(NameState *State = nullptr);
+ Node *parseLocalName(NameState *State);
+ Node *parseOperatorName(NameState *State);
+ Node *parseUnqualifiedName(NameState *State);
+ Node *parseUnnamedTypeName(NameState *State);
+ Node *parseSourceName(NameState *State);
+ Node *parseUnscopedName(NameState *State);
+ Node *parseNestedName(NameState *State);
+ Node *parseCtorDtorName(Node *&SoFar, NameState *State);
+
+ Node *parseAbiTags(Node *N);
+
+ /// Parse the <unresolved-name> production.
+ Node *parseUnresolvedName();
+ Node *parseSimpleId();
+ Node *parseBaseUnresolvedName();
+ Node *parseUnresolvedType();
+ Node *parseDestructorName();
+
+ /// Top-level entry point into the parser.
+ Node *parse();
+};
+
+const char* parse_discriminator(const char* first, const char* last);
+
+// <name> ::= <nested-name> // N
+// ::= <local-name> # See Scope Encoding below // Z
+// ::= <unscoped-template-name> <template-args>
+// ::= <unscoped-name>
+//
+// <unscoped-template-name> ::= <unscoped-name>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseName(NameState *State) {
+ consumeIf('L'); // extension
+
+ if (look() == 'N')
+ return getDerived().parseNestedName(State);
+ if (look() == 'Z')
+ return getDerived().parseLocalName(State);
+
+ // ::= <unscoped-template-name> <template-args>
+ if (look() == 'S' && look(1) != 't') {
+ Node *S = getDerived().parseSubstitution();
+ if (S == nullptr)
+ return nullptr;
+ if (look() != 'I')
+ return nullptr;
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ return make<NameWithTemplateArgs>(S, TA);
+ }
+
+ Node *N = getDerived().parseUnscopedName(State);
+ if (N == nullptr)
+ return nullptr;
+ // ::= <unscoped-template-name> <template-args>
+ if (look() == 'I') {
+ Subs.push_back(N);
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ return make<NameWithTemplateArgs>(N, TA);
+ }
+ // ::= <unscoped-name>
+ return N;
+}
+
+// <local-name> := Z <function encoding> E <entity name> [<discriminator>]
+// := Z <function encoding> E s [<discriminator>]
+// := Z <function encoding> Ed [ <parameter number> ] _ <entity name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseLocalName(NameState *State) {
+ if (!consumeIf('Z'))
+ return nullptr;
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr || !consumeIf('E'))
+ return nullptr;
+
+ if (consumeIf('s')) {
+ First = parse_discriminator(First, Last);
+ auto *StringLitName = make<NameType>("string literal");
+ if (!StringLitName)
+ return nullptr;
+ return make<LocalName>(Encoding, StringLitName);
+ }
+
+ if (consumeIf('d')) {
+ parseNumber(true);
+ if (!consumeIf('_'))
+ return nullptr;
+ Node *N = getDerived().parseName(State);
+ if (N == nullptr)
+ return nullptr;
+ return make<LocalName>(Encoding, N);
+ }
+
+ Node *Entity = getDerived().parseName(State);
+ if (Entity == nullptr)
+ return nullptr;
+ First = parse_discriminator(First, Last);
+ return make<LocalName>(Encoding, Entity);
+}
+
+// <unscoped-name> ::= <unqualified-name>
+// ::= St <unqualified-name> # ::std::
+// extension ::= StL<unqualified-name>
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnscopedName(NameState *State) {
+ if (consumeIf("StL") || consumeIf("St")) {
+ Node *R = getDerived().parseUnqualifiedName(State);
+ if (R == nullptr)
+ return nullptr;
+ return make<StdQualifiedName>(R);
+ }
+ return getDerived().parseUnqualifiedName(State);
+}
+
+// <unqualified-name> ::= <operator-name> [abi-tags]
+// ::= <ctor-dtor-name>
+// ::= <source-name>
+// ::= <unnamed-type-name>
+// ::= DC <source-name>+ E # structured binding declaration
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnqualifiedName(NameState *State) {
+ // <ctor-dtor-name>s are special-cased in parseNestedName().
+ Node *Result;
+ if (look() == 'U')
+ Result = getDerived().parseUnnamedTypeName(State);
+ else if (look() >= '1' && look() <= '9')
+ Result = getDerived().parseSourceName(State);
+ else if (consumeIf("DC")) {
+ size_t BindingsBegin = Names.size();
+ do {
+ Node *Binding = getDerived().parseSourceName(State);
+ if (Binding == nullptr)
+ return nullptr;
+ Names.push_back(Binding);
+ } while (!consumeIf('E'));
+ Result = make<StructuredBindingName>(popTrailingNodeArray(BindingsBegin));
+ } else
+ Result = getDerived().parseOperatorName(State);
+ if (Result != nullptr)
+ Result = getDerived().parseAbiTags(Result);
+ return Result;
+}
+
+// <unnamed-type-name> ::= Ut [<nonnegative number>] _
+// ::= <closure-type-name>
+//
+// <closure-type-name> ::= Ul <lambda-sig> E [ <nonnegative number> ] _
+//
+// <lambda-sig> ::= <parameter type>+ # Parameter types or "v" if the lambda has no parameters
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseUnnamedTypeName(NameState *) {
+ if (consumeIf("Ut")) {
+ StringView Count = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<UnnamedTypeName>(Count);
+ }
+ if (consumeIf("Ul")) {
+ NodeArray Params;
+ SwapAndRestore<bool> SwapParams(ParsingLambdaParams, true);
+ if (!consumeIf("vE")) {
+ size_t ParamsBegin = Names.size();
+ do {
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return nullptr;
+ Names.push_back(P);
+ } while (!consumeIf('E'));
+ Params = popTrailingNodeArray(ParamsBegin);
+ }
+ StringView Count = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<ClosureTypeName>(Params, Count);
+ }
+ if (consumeIf("Ub")) {
+ (void)parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<NameType>("'block-literal'");
+ }
+ return nullptr;
+}
+
+// <source-name> ::= <positive length number> <identifier>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSourceName(NameState *) {
+ size_t Length = 0;
+ if (parsePositiveInteger(&Length))
+ return nullptr;
+ if (numLeft() < Length || Length == 0)
+ return nullptr;
+ StringView Name(First, First + Length);
+ First += Length;
+ if (Name.startsWith("_GLOBAL__N"))
+ return make<NameType>("(anonymous namespace)");
+ return make<NameType>(Name);
+}
+
+// <operator-name> ::= aa # &&
+// ::= ad # & (unary)
+// ::= an # &
+// ::= aN # &=
+// ::= aS # =
+// ::= cl # ()
+// ::= cm # ,
+// ::= co # ~
+// ::= cv <type> # (cast)
+// ::= da # delete[]
+// ::= de # * (unary)
+// ::= dl # delete
+// ::= dv # /
+// ::= dV # /=
+// ::= eo # ^
+// ::= eO # ^=
+// ::= eq # ==
+// ::= ge # >=
+// ::= gt # >
+// ::= ix # []
+// ::= le # <=
+// ::= li <source-name> # operator ""
+// ::= ls # <<
+// ::= lS # <<=
+// ::= lt # <
+// ::= mi # -
+// ::= mI # -=
+// ::= ml # *
+// ::= mL # *=
+// ::= mm # -- (postfix in <expression> context)
+// ::= na # new[]
+// ::= ne # !=
+// ::= ng # - (unary)
+// ::= nt # !
+// ::= nw # new
+// ::= oo # ||
+// ::= or # |
+// ::= oR # |=
+// ::= pm # ->*
+// ::= pl # +
+// ::= pL # +=
+// ::= pp # ++ (postfix in <expression> context)
+// ::= ps # + (unary)
+// ::= pt # ->
+// ::= qu # ?
+// ::= rm # %
+// ::= rM # %=
+// ::= rs # >>
+// ::= rS # >>=
+// ::= ss # <=> C++2a
+// ::= v <digit> <source-name> # vendor extended operator
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseOperatorName(NameState *State) {
+ switch (look()) {
+ case 'a':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator&&");
+ case 'd':
+ case 'n':
+ First += 2;
+ return make<NameType>("operator&");
+ case 'N':
+ First += 2;
+ return make<NameType>("operator&=");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator=");
+ }
+ return nullptr;
+ case 'c':
+ switch (look(1)) {
+ case 'l':
+ First += 2;
+ return make<NameType>("operator()");
+ case 'm':
+ First += 2;
+ return make<NameType>("operator,");
+ case 'o':
+ First += 2;
+ return make<NameType>("operator~");
+ // ::= cv <type> # (cast)
+ case 'v': {
+ First += 2;
+ SwapAndRestore<bool> SaveTemplate(TryToParseTemplateArgs, false);
+ // If we're parsing an encoding, State != nullptr and the conversion
+ // operators' <type> could have a <template-param> that refers to some
+ // <template-arg>s further ahead in the mangled name.
+ SwapAndRestore<bool> SavePermit(PermitForwardTemplateReferences,
+ PermitForwardTemplateReferences ||
+ State != nullptr);
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ if (State) State->CtorDtorConversion = true;
+ return make<ConversionOperatorType>(Ty);
+ }
+ }
+ return nullptr;
+ case 'd':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator delete[]");
+ case 'e':
+ First += 2;
+ return make<NameType>("operator*");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator delete");
+ case 'v':
+ First += 2;
+ return make<NameType>("operator/");
+ case 'V':
+ First += 2;
+ return make<NameType>("operator/=");
+ }
+ return nullptr;
+ case 'e':
+ switch (look(1)) {
+ case 'o':
+ First += 2;
+ return make<NameType>("operator^");
+ case 'O':
+ First += 2;
+ return make<NameType>("operator^=");
+ case 'q':
+ First += 2;
+ return make<NameType>("operator==");
+ }
+ return nullptr;
+ case 'g':
+ switch (look(1)) {
+ case 'e':
+ First += 2;
+ return make<NameType>("operator>=");
+ case 't':
+ First += 2;
+ return make<NameType>("operator>");
+ }
+ return nullptr;
+ case 'i':
+ if (look(1) == 'x') {
+ First += 2;
+ return make<NameType>("operator[]");
+ }
+ return nullptr;
+ case 'l':
+ switch (look(1)) {
+ case 'e':
+ First += 2;
+ return make<NameType>("operator<=");
+ // ::= li <source-name> # operator ""
+ case 'i': {
+ First += 2;
+ Node *SN = getDerived().parseSourceName(State);
+ if (SN == nullptr)
+ return nullptr;
+ return make<LiteralOperator>(SN);
+ }
+ case 's':
+ First += 2;
+ return make<NameType>("operator<<");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator<<=");
+ case 't':
+ First += 2;
+ return make<NameType>("operator<");
+ }
+ return nullptr;
+ case 'm':
+ switch (look(1)) {
+ case 'i':
+ First += 2;
+ return make<NameType>("operator-");
+ case 'I':
+ First += 2;
+ return make<NameType>("operator-=");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator*");
+ case 'L':
+ First += 2;
+ return make<NameType>("operator*=");
+ case 'm':
+ First += 2;
+ return make<NameType>("operator--");
+ }
+ return nullptr;
+ case 'n':
+ switch (look(1)) {
+ case 'a':
+ First += 2;
+ return make<NameType>("operator new[]");
+ case 'e':
+ First += 2;
+ return make<NameType>("operator!=");
+ case 'g':
+ First += 2;
+ return make<NameType>("operator-");
+ case 't':
+ First += 2;
+ return make<NameType>("operator!");
+ case 'w':
+ First += 2;
+ return make<NameType>("operator new");
+ }
+ return nullptr;
+ case 'o':
+ switch (look(1)) {
+ case 'o':
+ First += 2;
+ return make<NameType>("operator||");
+ case 'r':
+ First += 2;
+ return make<NameType>("operator|");
+ case 'R':
+ First += 2;
+ return make<NameType>("operator|=");
+ }
+ return nullptr;
+ case 'p':
+ switch (look(1)) {
+ case 'm':
+ First += 2;
+ return make<NameType>("operator->*");
+ case 'l':
+ First += 2;
+ return make<NameType>("operator+");
+ case 'L':
+ First += 2;
+ return make<NameType>("operator+=");
+ case 'p':
+ First += 2;
+ return make<NameType>("operator++");
+ case 's':
+ First += 2;
+ return make<NameType>("operator+");
+ case 't':
+ First += 2;
+ return make<NameType>("operator->");
+ }
+ return nullptr;
+ case 'q':
+ if (look(1) == 'u') {
+ First += 2;
+ return make<NameType>("operator?");
+ }
+ return nullptr;
+ case 'r':
+ switch (look(1)) {
+ case 'm':
+ First += 2;
+ return make<NameType>("operator%");
+ case 'M':
+ First += 2;
+ return make<NameType>("operator%=");
+ case 's':
+ First += 2;
+ return make<NameType>("operator>>");
+ case 'S':
+ First += 2;
+ return make<NameType>("operator>>=");
+ }
+ return nullptr;
+ case 's':
+ if (look(1) == 's') {
+ First += 2;
+ return make<NameType>("operator<=>");
+ }
+ return nullptr;
+ // ::= v <digit> <source-name> # vendor extended operator
+ case 'v':
+ if (std::isdigit(look(1))) {
+ First += 2;
+ Node *SN = getDerived().parseSourceName(State);
+ if (SN == nullptr)
+ return nullptr;
+ return make<ConversionOperatorType>(SN);
+ }
+ return nullptr;
+ }
+ return nullptr;
+}
+
+// <ctor-dtor-name> ::= C1 # complete object constructor
+// ::= C2 # base object constructor
+// ::= C3 # complete object allocating constructor
+// extension ::= C5 # ?
+// ::= D0 # deleting destructor
+// ::= D1 # complete object destructor
+// ::= D2 # base object destructor
+// extension ::= D5 # ?
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseCtorDtorName(Node *&SoFar,
+ NameState *State) {
+ if (SoFar->getKind() == Node::KSpecialSubstitution) {
+ auto SSK = static_cast<SpecialSubstitution *>(SoFar)->SSK;
+ switch (SSK) {
+ case SpecialSubKind::string:
+ case SpecialSubKind::istream:
+ case SpecialSubKind::ostream:
+ case SpecialSubKind::iostream:
+ SoFar = make<ExpandedSpecialSubstitution>(SSK);
+ if (!SoFar)
+ return nullptr;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (consumeIf('C')) {
+ bool IsInherited = consumeIf('I');
+ if (look() != '1' && look() != '2' && look() != '3' && look() != '5')
+ return nullptr;
+ int Variant = look() - '0';
+ ++First;
+ if (State) State->CtorDtorConversion = true;
+ if (IsInherited) {
+ if (getDerived().parseName(State) == nullptr)
+ return nullptr;
+ }
+ return make<CtorDtorName>(SoFar, false, Variant);
+ }
+
+ if (look() == 'D' &&
+ (look(1) == '0' || look(1) == '1' || look(1) == '2' || look(1) == '5')) {
+ int Variant = look(1) - '0';
+ First += 2;
+ if (State) State->CtorDtorConversion = true;
+ return make<CtorDtorName>(SoFar, true, Variant);
+ }
+
+ return nullptr;
+}
+
+// <nested-name> ::= N [<CV-Qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
+// ::= N [<CV-Qualifiers>] [<ref-qualifier>] <template-prefix> <template-args> E
+//
+// <prefix> ::= <prefix> <unqualified-name>
+// ::= <template-prefix> <template-args>
+// ::= <template-param>
+// ::= <decltype>
+// ::= # empty
+// ::= <substitution>
+// ::= <prefix> <data-member-prefix>
+// extension ::= L
+//
+// <data-member-prefix> := <member source-name> [<template-args>] M
+//
+// <template-prefix> ::= <prefix> <template unqualified-name>
+// ::= <template-param>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseNestedName(NameState *State) {
+ if (!consumeIf('N'))
+ return nullptr;
+
+ Qualifiers CVTmp = parseCVQualifiers();
+ if (State) State->CVQualifiers = CVTmp;
+
+ if (consumeIf('O')) {
+ if (State) State->ReferenceQualifier = FrefQualRValue;
+ } else if (consumeIf('R')) {
+ if (State) State->ReferenceQualifier = FrefQualLValue;
+ } else
+ if (State) State->ReferenceQualifier = FrefQualNone;
+
+ Node *SoFar = nullptr;
+ auto PushComponent = [&](Node *Comp) {
+ if (!Comp) return false;
+ if (SoFar) SoFar = make<NestedName>(SoFar, Comp);
+ else SoFar = Comp;
+ if (State) State->EndsWithTemplateArgs = false;
+ return SoFar != nullptr;
+ };
+
+ if (consumeIf("St")) {
+ SoFar = make<NameType>("std");
+ if (!SoFar)
+ return nullptr;
+ }
+
+ while (!consumeIf('E')) {
+ consumeIf('L'); // extension
+
+ // <data-member-prefix> := <member source-name> [<template-args>] M
+ if (consumeIf('M')) {
+ if (SoFar == nullptr)
+ return nullptr;
+ continue;
+ }
+
+ // ::= <template-param>
+ if (look() == 'T') {
+ if (!PushComponent(getDerived().parseTemplateParam()))
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <template-prefix> <template-args>
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs(State != nullptr);
+ if (TA == nullptr || SoFar == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ if (State) State->EndsWithTemplateArgs = true;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <decltype>
+ if (look() == 'D' && (look(1) == 't' || look(1) == 'T')) {
+ if (!PushComponent(getDerived().parseDecltype()))
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <substitution>
+ if (look() == 'S' && look(1) != 't') {
+ Node *S = getDerived().parseSubstitution();
+ if (!PushComponent(S))
+ return nullptr;
+ if (SoFar != S)
+ Subs.push_back(S);
+ continue;
+ }
+
+ // Parse an <unqualified-name> thats actually a <ctor-dtor-name>.
+ if (look() == 'C' || (look() == 'D' && look(1) != 'C')) {
+ if (SoFar == nullptr)
+ return nullptr;
+ if (!PushComponent(getDerived().parseCtorDtorName(SoFar, State)))
+ return nullptr;
+ SoFar = getDerived().parseAbiTags(SoFar);
+ if (SoFar == nullptr)
+ return nullptr;
+ Subs.push_back(SoFar);
+ continue;
+ }
+
+ // ::= <prefix> <unqualified-name>
+ if (!PushComponent(getDerived().parseUnqualifiedName(State)))
+ return nullptr;
+ Subs.push_back(SoFar);
+ }
+
+ if (SoFar == nullptr || Subs.empty())
+ return nullptr;
+
+ Subs.pop_back();
+ return SoFar;
+}
+
+// <simple-id> ::= <source-name> [ <template-args> ]
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSimpleId() {
+ Node *SN = getDerived().parseSourceName(/*NameState=*/nullptr);
+ if (SN == nullptr)
+ return nullptr;
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ return make<NameWithTemplateArgs>(SN, TA);
+ }
+ return SN;
+}
+
+// <destructor-name> ::= <unresolved-type> # e.g., ~T or ~decltype(f())
+// ::= <simple-id> # e.g., ~A<2*N>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseDestructorName() {
+ Node *Result;
+ if (std::isdigit(look()))
+ Result = getDerived().parseSimpleId();
+ else
+ Result = getDerived().parseUnresolvedType();
+ if (Result == nullptr)
+ return nullptr;
+ return make<DtorName>(Result);
+}
+
+// <unresolved-type> ::= <template-param>
+// ::= <decltype>
+// ::= <substitution>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedType() {
+ if (look() == 'T') {
+ Node *TP = getDerived().parseTemplateParam();
+ if (TP == nullptr)
+ return nullptr;
+ Subs.push_back(TP);
+ return TP;
+ }
+ if (look() == 'D') {
+ Node *DT = getDerived().parseDecltype();
+ if (DT == nullptr)
+ return nullptr;
+ Subs.push_back(DT);
+ return DT;
+ }
+ return getDerived().parseSubstitution();
+}
+
+// <base-unresolved-name> ::= <simple-id> # unresolved name
+// extension ::= <operator-name> # unresolved operator-function-id
+// extension ::= <operator-name> <template-args> # unresolved operator template-id
+// ::= on <operator-name> # unresolved operator-function-id
+// ::= on <operator-name> <template-args> # unresolved operator template-id
+// ::= dn <destructor-name> # destructor or pseudo-destructor;
+// # e.g. ~X or ~X<N-1>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBaseUnresolvedName() {
+ if (std::isdigit(look()))
+ return getDerived().parseSimpleId();
+
+ if (consumeIf("dn"))
+ return getDerived().parseDestructorName();
+
+ consumeIf("on");
+
+ Node *Oper = getDerived().parseOperatorName(/*NameState=*/nullptr);
+ if (Oper == nullptr)
+ return nullptr;
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ return make<NameWithTemplateArgs>(Oper, TA);
+ }
+ return Oper;
+}
+
+// <unresolved-name>
+// extension ::= srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name>
+// ::= [gs] <base-unresolved-name> # x or (with "gs") ::x
+// ::= [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name>
+// # A::x, N::y, A<T>::z; "gs" means leading "::"
+// ::= sr <unresolved-type> <base-unresolved-name> # T::x / decltype(p)::x
+// extension ::= sr <unresolved-type> <template-args> <base-unresolved-name>
+// # T::N::x /decltype(p)::N::x
+// (ignored) ::= srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name>
+//
+// <unresolved-qualifier-level> ::= <simple-id>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseUnresolvedName() {
+ Node *SoFar = nullptr;
+
+ // srN <unresolved-type> [<template-args>] <unresolved-qualifier-level>* E <base-unresolved-name>
+ // srN <unresolved-type> <unresolved-qualifier-level>+ E <base-unresolved-name>
+ if (consumeIf("srN")) {
+ SoFar = getDerived().parseUnresolvedType();
+ if (SoFar == nullptr)
+ return nullptr;
+
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ }
+
+ while (!consumeIf('E')) {
+ Node *Qual = getDerived().parseSimpleId();
+ if (Qual == nullptr)
+ return nullptr;
+ SoFar = make<QualifiedName>(SoFar, Qual);
+ if (!SoFar)
+ return nullptr;
+ }
+
+ Node *Base = getDerived().parseBaseUnresolvedName();
+ if (Base == nullptr)
+ return nullptr;
+ return make<QualifiedName>(SoFar, Base);
+ }
+
+ bool Global = consumeIf("gs");
+
+ // [gs] <base-unresolved-name> # x or (with "gs") ::x
+ if (!consumeIf("sr")) {
+ SoFar = getDerived().parseBaseUnresolvedName();
+ if (SoFar == nullptr)
+ return nullptr;
+ if (Global)
+ SoFar = make<GlobalQualifiedName>(SoFar);
+ return SoFar;
+ }
+
+ // [gs] sr <unresolved-qualifier-level>+ E <base-unresolved-name>
+ if (std::isdigit(look())) {
+ do {
+ Node *Qual = getDerived().parseSimpleId();
+ if (Qual == nullptr)
+ return nullptr;
+ if (SoFar)
+ SoFar = make<QualifiedName>(SoFar, Qual);
+ else if (Global)
+ SoFar = make<GlobalQualifiedName>(Qual);
+ else
+ SoFar = Qual;
+ if (!SoFar)
+ return nullptr;
+ } while (!consumeIf('E'));
+ }
+ // sr <unresolved-type> <base-unresolved-name>
+ // sr <unresolved-type> <template-args> <base-unresolved-name>
+ else {
+ SoFar = getDerived().parseUnresolvedType();
+ if (SoFar == nullptr)
+ return nullptr;
+
+ if (look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ SoFar = make<NameWithTemplateArgs>(SoFar, TA);
+ if (!SoFar)
+ return nullptr;
+ }
+ }
+
+ assert(SoFar != nullptr);
+
+ Node *Base = getDerived().parseBaseUnresolvedName();
+ if (Base == nullptr)
+ return nullptr;
+ return make<QualifiedName>(SoFar, Base);
+}
+
+// <abi-tags> ::= <abi-tag> [<abi-tags>]
+// <abi-tag> ::= B <source-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseAbiTags(Node *N) {
+ while (consumeIf('B')) {
+ StringView SN = parseBareSourceName();
+ if (SN.empty())
+ return nullptr;
+ N = make<AbiTagAttr>(N, SN);
+ if (!N)
+ return nullptr;
+ }
+ return N;
+}
+
+// <number> ::= [n] <non-negative decimal integer>
+template <typename Alloc, typename Derived>
+StringView
+AbstractManglingParser<Alloc, Derived>::parseNumber(bool AllowNegative) {
+ const char *Tmp = First;
+ if (AllowNegative)
+ consumeIf('n');
+ if (numLeft() == 0 || !std::isdigit(*First))
+ return StringView();
+ while (numLeft() != 0 && std::isdigit(*First))
+ ++First;
+ return StringView(Tmp, First);
+}
+
+// <positive length number> ::= [0-9]*
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parsePositiveInteger(size_t *Out) {
+ *Out = 0;
+ if (look() < '0' || look() > '9')
+ return true;
+ while (look() >= '0' && look() <= '9') {
+ *Out *= 10;
+ *Out += static_cast<size_t>(consume() - '0');
+ }
+ return false;
+}
+
+template <typename Alloc, typename Derived>
+StringView AbstractManglingParser<Alloc, Derived>::parseBareSourceName() {
+ size_t Int = 0;
+ if (parsePositiveInteger(&Int) || numLeft() < Int)
+ return StringView();
+ StringView R(First, First + Int);
+ First += Int;
+ return R;
+}
+
+// <function-type> ::= [<CV-qualifiers>] [<exception-spec>] [Dx] F [Y] <bare-function-type> [<ref-qualifier>] E
+//
+// <exception-spec> ::= Do # non-throwing exception-specification (e.g., noexcept, throw())
+// ::= DO <expression> E # computed (instantiation-dependent) noexcept
+// ::= Dw <type>+ E # dynamic exception specification with instantiation-dependent types
+//
+// <ref-qualifier> ::= R # & ref-qualifier
+// <ref-qualifier> ::= O # && ref-qualifier
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFunctionType() {
+ Qualifiers CVQuals = parseCVQualifiers();
+
+ Node *ExceptionSpec = nullptr;
+ if (consumeIf("Do")) {
+ ExceptionSpec = make<NameType>("noexcept");
+ if (!ExceptionSpec)
+ return nullptr;
+ } else if (consumeIf("DO")) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr || !consumeIf('E'))
+ return nullptr;
+ ExceptionSpec = make<NoexceptSpec>(E);
+ if (!ExceptionSpec)
+ return nullptr;
+ } else if (consumeIf("Dw")) {
+ size_t SpecsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ Names.push_back(T);
+ }
+ ExceptionSpec =
+ make<DynamicExceptionSpec>(popTrailingNodeArray(SpecsBegin));
+ if (!ExceptionSpec)
+ return nullptr;
+ }
+
+ consumeIf("Dx"); // transaction safe
+
+ if (!consumeIf('F'))
+ return nullptr;
+ consumeIf('Y'); // extern "C"
+ Node *ReturnType = getDerived().parseType();
+ if (ReturnType == nullptr)
+ return nullptr;
+
+ FunctionRefQual ReferenceQualifier = FrefQualNone;
+ size_t ParamsBegin = Names.size();
+ while (true) {
+ if (consumeIf('E'))
+ break;
+ if (consumeIf('v'))
+ continue;
+ if (consumeIf("RE")) {
+ ReferenceQualifier = FrefQualLValue;
+ break;
+ }
+ if (consumeIf("OE")) {
+ ReferenceQualifier = FrefQualRValue;
+ break;
+ }
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ Names.push_back(T);
+ }
+
+ NodeArray Params = popTrailingNodeArray(ParamsBegin);
+ return make<FunctionType>(ReturnType, Params, CVQuals,
+ ReferenceQualifier, ExceptionSpec);
+}
+
+// extension:
+// <vector-type> ::= Dv <positive dimension number> _ <extended element type>
+// ::= Dv [<dimension expression>] _ <element type>
+// <extended element type> ::= <element type>
+// ::= p # AltiVec vector pixel
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseVectorType() {
+ if (!consumeIf("Dv"))
+ return nullptr;
+ if (look() >= '1' && look() <= '9') {
+ StringView DimensionNumber = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ if (consumeIf('p'))
+ return make<PixelVectorType>(DimensionNumber);
+ Node *ElemType = getDerived().parseType();
+ if (ElemType == nullptr)
+ return nullptr;
+ return make<VectorType>(ElemType, DimensionNumber);
+ }
+
+ if (!consumeIf('_')) {
+ Node *DimExpr = getDerived().parseExpr();
+ if (!DimExpr)
+ return nullptr;
+ if (!consumeIf('_'))
+ return nullptr;
+ Node *ElemType = getDerived().parseType();
+ if (!ElemType)
+ return nullptr;
+ return make<VectorType>(ElemType, DimExpr);
+ }
+ Node *ElemType = getDerived().parseType();
+ if (!ElemType)
+ return nullptr;
+ return make<VectorType>(ElemType, StringView());
+}
+
+// <decltype> ::= Dt <expression> E # decltype of an id-expression or class member access (C++0x)
+// ::= DT <expression> E # decltype of an expression (C++0x)
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseDecltype() {
+ if (!consumeIf('D'))
+ return nullptr;
+ if (!consumeIf('t') && !consumeIf('T'))
+ return nullptr;
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return nullptr;
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<EnclosingExpr>("decltype(", E, ")");
+}
+
+// <array-type> ::= A <positive dimension number> _ <element type>
+// ::= A [<dimension expression>] _ <element type>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseArrayType() {
+ if (!consumeIf('A'))
+ return nullptr;
+
+ NodeOrString Dimension;
+
+ if (std::isdigit(look())) {
+ Dimension = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ } else if (!consumeIf('_')) {
+ Node *DimExpr = getDerived().parseExpr();
+ if (DimExpr == nullptr)
+ return nullptr;
+ if (!consumeIf('_'))
+ return nullptr;
+ Dimension = DimExpr;
+ }
+
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<ArrayType>(Ty, Dimension);
+}
+
+// <pointer-to-member-type> ::= M <class type> <member type>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parsePointerToMemberType() {
+ if (!consumeIf('M'))
+ return nullptr;
+ Node *ClassType = getDerived().parseType();
+ if (ClassType == nullptr)
+ return nullptr;
+ Node *MemberType = getDerived().parseType();
+ if (MemberType == nullptr)
+ return nullptr;
+ return make<PointerToMemberType>(ClassType, MemberType);
+}
+
+// <class-enum-type> ::= <name> # non-dependent type name, dependent type name, or dependent typename-specifier
+// ::= Ts <name> # dependent elaborated type specifier using 'struct' or 'class'
+// ::= Tu <name> # dependent elaborated type specifier using 'union'
+// ::= Te <name> # dependent elaborated type specifier using 'enum'
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseClassEnumType() {
+ StringView ElabSpef;
+ if (consumeIf("Ts"))
+ ElabSpef = "struct";
+ else if (consumeIf("Tu"))
+ ElabSpef = "union";
+ else if (consumeIf("Te"))
+ ElabSpef = "enum";
+
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+
+ if (!ElabSpef.empty())
+ return make<ElaboratedTypeSpefType>(ElabSpef, Name);
+
+ return Name;
+}
+
+// <qualified-type> ::= <qualifiers> <type>
+// <qualifiers> ::= <extended-qualifier>* <CV-qualifiers>
+// <extended-qualifier> ::= U <source-name> [<template-args>] # vendor extended type qualifier
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseQualifiedType() {
+ if (consumeIf('U')) {
+ StringView Qual = parseBareSourceName();
+ if (Qual.empty())
+ return nullptr;
+
+ // FIXME parse the optional <template-args> here!
+
+ // extension ::= U <objc-name> <objc-type> # objc-type<identifier>
+ if (Qual.startsWith("objcproto")) {
+ StringView ProtoSourceName = Qual.dropFront(std::strlen("objcproto"));
+ StringView Proto;
+ {
+ SwapAndRestore<const char *> SaveFirst(First, ProtoSourceName.begin()),
+ SaveLast(Last, ProtoSourceName.end());
+ Proto = parseBareSourceName();
+ }
+ if (Proto.empty())
+ return nullptr;
+ Node *Child = getDerived().parseQualifiedType();
+ if (Child == nullptr)
+ return nullptr;
+ return make<ObjCProtoName>(Child, Proto);
+ }
+
+ Node *Child = getDerived().parseQualifiedType();
+ if (Child == nullptr)
+ return nullptr;
+ return make<VendorExtQualType>(Child, Qual);
+ }
+
+ Qualifiers Quals = parseCVQualifiers();
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ if (Quals != QualNone)
+ Ty = make<QualType>(Ty, Quals);
+ return Ty;
+}
+
+// <type> ::= <builtin-type>
+// ::= <qualified-type>
+// ::= <function-type>
+// ::= <class-enum-type>
+// ::= <array-type>
+// ::= <pointer-to-member-type>
+// ::= <template-param>
+// ::= <template-template-param> <template-args>
+// ::= <decltype>
+// ::= P <type> # pointer
+// ::= R <type> # l-value reference
+// ::= O <type> # r-value reference (C++11)
+// ::= C <type> # complex pair (C99)
+// ::= G <type> # imaginary (C99)
+// ::= <substitution> # See Compression below
+// extension ::= U <objc-name> <objc-type> # objc-type<identifier>
+// extension ::= <vector-type> # <vector-type> starts with Dv
+//
+// <objc-name> ::= <k0 number> objcproto <k1 number> <identifier> # k0 = 9 + <number of digits in k1> + k1
+// <objc-type> ::= <source-name> # PU<11+>objcproto 11objc_object<source-name> 11objc_object -> id<source-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseType() {
+ Node *Result = nullptr;
+
+ switch (look()) {
+ // ::= <qualified-type>
+ case 'r':
+ case 'V':
+ case 'K': {
+ unsigned AfterQuals = 0;
+ if (look(AfterQuals) == 'r') ++AfterQuals;
+ if (look(AfterQuals) == 'V') ++AfterQuals;
+ if (look(AfterQuals) == 'K') ++AfterQuals;
+
+ if (look(AfterQuals) == 'F' ||
+ (look(AfterQuals) == 'D' &&
+ (look(AfterQuals + 1) == 'o' || look(AfterQuals + 1) == 'O' ||
+ look(AfterQuals + 1) == 'w' || look(AfterQuals + 1) == 'x'))) {
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ DEMANGLE_FALLTHROUGH;
+ }
+ case 'U': {
+ Result = getDerived().parseQualifiedType();
+ break;
+ }
+ // <builtin-type> ::= v # void
+ case 'v':
+ ++First;
+ return make<NameType>("void");
+ // ::= w # wchar_t
+ case 'w':
+ ++First;
+ return make<NameType>("wchar_t");
+ // ::= b # bool
+ case 'b':
+ ++First;
+ return make<NameType>("bool");
+ // ::= c # char
+ case 'c':
+ ++First;
+ return make<NameType>("char");
+ // ::= a # signed char
+ case 'a':
+ ++First;
+ return make<NameType>("signed char");
+ // ::= h # unsigned char
+ case 'h':
+ ++First;
+ return make<NameType>("unsigned char");
+ // ::= s # short
+ case 's':
+ ++First;
+ return make<NameType>("short");
+ // ::= t # unsigned short
+ case 't':
+ ++First;
+ return make<NameType>("unsigned short");
+ // ::= i # int
+ case 'i':
+ ++First;
+ return make<NameType>("int");
+ // ::= j # unsigned int
+ case 'j':
+ ++First;
+ return make<NameType>("unsigned int");
+ // ::= l # long
+ case 'l':
+ ++First;
+ return make<NameType>("long");
+ // ::= m # unsigned long
+ case 'm':
+ ++First;
+ return make<NameType>("unsigned long");
+ // ::= x # long long, __int64
+ case 'x':
+ ++First;
+ return make<NameType>("long long");
+ // ::= y # unsigned long long, __int64
+ case 'y':
+ ++First;
+ return make<NameType>("unsigned long long");
+ // ::= n # __int128
+ case 'n':
+ ++First;
+ return make<NameType>("__int128");
+ // ::= o # unsigned __int128
+ case 'o':
+ ++First;
+ return make<NameType>("unsigned __int128");
+ // ::= f # float
+ case 'f':
+ ++First;
+ return make<NameType>("float");
+ // ::= d # double
+ case 'd':
+ ++First;
+ return make<NameType>("double");
+ // ::= e # long double, __float80
+ case 'e':
+ ++First;
+ return make<NameType>("long double");
+ // ::= g # __float128
+ case 'g':
+ ++First;
+ return make<NameType>("__float128");
+ // ::= z # ellipsis
+ case 'z':
+ ++First;
+ return make<NameType>("...");
+
+ // <builtin-type> ::= u <source-name> # vendor extended type
+ case 'u': {
+ ++First;
+ StringView Res = parseBareSourceName();
+ if (Res.empty())
+ return nullptr;
+ return make<NameType>(Res);
+ }
+ case 'D':
+ switch (look(1)) {
+ // ::= Dd # IEEE 754r decimal floating point (64 bits)
+ case 'd':
+ First += 2;
+ return make<NameType>("decimal64");
+ // ::= De # IEEE 754r decimal floating point (128 bits)
+ case 'e':
+ First += 2;
+ return make<NameType>("decimal128");
+ // ::= Df # IEEE 754r decimal floating point (32 bits)
+ case 'f':
+ First += 2;
+ return make<NameType>("decimal32");
+ // ::= Dh # IEEE 754r half-precision floating point (16 bits)
+ case 'h':
+ First += 2;
+ return make<NameType>("decimal16");
+ // ::= Di # char32_t
+ case 'i':
+ First += 2;
+ return make<NameType>("char32_t");
+ // ::= Ds # char16_t
+ case 's':
+ First += 2;
+ return make<NameType>("char16_t");
+ // ::= Da # auto (in dependent new-expressions)
+ case 'a':
+ First += 2;
+ return make<NameType>("auto");
+ // ::= Dc # decltype(auto)
+ case 'c':
+ First += 2;
+ return make<NameType>("decltype(auto)");
+ // ::= Dn # std::nullptr_t (i.e., decltype(nullptr))
+ case 'n':
+ First += 2;
+ return make<NameType>("std::nullptr_t");
+
+ // ::= <decltype>
+ case 't':
+ case 'T': {
+ Result = getDerived().parseDecltype();
+ break;
+ }
+ // extension ::= <vector-type> # <vector-type> starts with Dv
+ case 'v': {
+ Result = getDerived().parseVectorType();
+ break;
+ }
+ // ::= Dp <type> # pack expansion (C++0x)
+ case 'p': {
+ First += 2;
+ Node *Child = getDerived().parseType();
+ if (!Child)
+ return nullptr;
+ Result = make<ParameterPackExpansion>(Child);
+ break;
+ }
+ // Exception specifier on a function type.
+ case 'o':
+ case 'O':
+ case 'w':
+ // Transaction safe function type.
+ case 'x':
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ break;
+ // ::= <function-type>
+ case 'F': {
+ Result = getDerived().parseFunctionType();
+ break;
+ }
+ // ::= <array-type>
+ case 'A': {
+ Result = getDerived().parseArrayType();
+ break;
+ }
+ // ::= <pointer-to-member-type>
+ case 'M': {
+ Result = getDerived().parsePointerToMemberType();
+ break;
+ }
+ // ::= <template-param>
+ case 'T': {
+ // This could be an elaborate type specifier on a <class-enum-type>.
+ if (look(1) == 's' || look(1) == 'u' || look(1) == 'e') {
+ Result = getDerived().parseClassEnumType();
+ break;
+ }
+
+ Result = getDerived().parseTemplateParam();
+ if (Result == nullptr)
+ return nullptr;
+
+ // Result could be either of:
+ // <type> ::= <template-param>
+ // <type> ::= <template-template-param> <template-args>
+ //
+ // <template-template-param> ::= <template-param>
+ // ::= <substitution>
+ //
+ // If this is followed by some <template-args>, and we're permitted to
+ // parse them, take the second production.
+
+ if (TryToParseTemplateArgs && look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ Result = make<NameWithTemplateArgs>(Result, TA);
+ }
+ break;
+ }
+ // ::= P <type> # pointer
+ case 'P': {
+ ++First;
+ Node *Ptr = getDerived().parseType();
+ if (Ptr == nullptr)
+ return nullptr;
+ Result = make<PointerType>(Ptr);
+ break;
+ }
+ // ::= R <type> # l-value reference
+ case 'R': {
+ ++First;
+ Node *Ref = getDerived().parseType();
+ if (Ref == nullptr)
+ return nullptr;
+ Result = make<ReferenceType>(Ref, ReferenceKind::LValue);
+ break;
+ }
+ // ::= O <type> # r-value reference (C++11)
+ case 'O': {
+ ++First;
+ Node *Ref = getDerived().parseType();
+ if (Ref == nullptr)
+ return nullptr;
+ Result = make<ReferenceType>(Ref, ReferenceKind::RValue);
+ break;
+ }
+ // ::= C <type> # complex pair (C99)
+ case 'C': {
+ ++First;
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return nullptr;
+ Result = make<PostfixQualifiedType>(P, " complex");
+ break;
+ }
+ // ::= G <type> # imaginary (C99)
+ case 'G': {
+ ++First;
+ Node *P = getDerived().parseType();
+ if (P == nullptr)
+ return P;
+ Result = make<PostfixQualifiedType>(P, " imaginary");
+ break;
+ }
+ // ::= <substitution> # See Compression below
+ case 'S': {
+ if (look(1) && look(1) != 't') {
+ Node *Sub = getDerived().parseSubstitution();
+ if (Sub == nullptr)
+ return nullptr;
+
+ // Sub could be either of:
+ // <type> ::= <substitution>
+ // <type> ::= <template-template-param> <template-args>
+ //
+ // <template-template-param> ::= <template-param>
+ // ::= <substitution>
+ //
+ // If this is followed by some <template-args>, and we're permitted to
+ // parse them, take the second production.
+
+ if (TryToParseTemplateArgs && look() == 'I') {
+ Node *TA = getDerived().parseTemplateArgs();
+ if (TA == nullptr)
+ return nullptr;
+ Result = make<NameWithTemplateArgs>(Sub, TA);
+ break;
+ }
+
+ // If all we parsed was a substitution, don't re-insert into the
+ // substitution table.
+ return Sub;
+ }
+ DEMANGLE_FALLTHROUGH;
+ }
+ // ::= <class-enum-type>
+ default: {
+ Result = getDerived().parseClassEnumType();
+ break;
+ }
+ }
+
+ // If we parsed a type, insert it into the substitution table. Note that all
+ // <builtin-type>s and <substitution>s have already bailed out, because they
+ // don't get substitutions.
+ if (Result != nullptr)
+ Subs.push_back(Result);
+ return Result;
+}
+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parsePrefixExpr(StringView Kind) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return nullptr;
+ return make<PrefixExpr>(Kind, E);
+}
+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBinaryExpr(StringView Kind) {
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<BinaryExpr>(LHS, Kind, RHS);
+}
+
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseIntegerLiteral(StringView Lit) {
+ StringView Tmp = parseNumber(true);
+ if (!Tmp.empty() && consumeIf('E'))
+ return make<IntegerLiteral>(Lit, Tmp);
+ return nullptr;
+}
+
+// <CV-Qualifiers> ::= [r] [V] [K]
+template <typename Alloc, typename Derived>
+Qualifiers AbstractManglingParser<Alloc, Derived>::parseCVQualifiers() {
+ Qualifiers CVR = QualNone;
+ if (consumeIf('r'))
+ CVR |= QualRestrict;
+ if (consumeIf('V'))
+ CVR |= QualVolatile;
+ if (consumeIf('K'))
+ CVR |= QualConst;
+ return CVR;
+}
+
+// <function-param> ::= fp <top-level CV-Qualifiers> _ # L == 0, first parameter
+// ::= fp <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L == 0, second and later parameters
+// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> _ # L > 0, first parameter
+// ::= fL <L-1 non-negative number> p <top-level CV-Qualifiers> <parameter-2 non-negative number> _ # L > 0, second and later parameters
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFunctionParam() {
+ if (consumeIf("fp")) {
+ parseCVQualifiers();
+ StringView Num = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<FunctionParam>(Num);
+ }
+ if (consumeIf("fL")) {
+ if (parseNumber().empty())
+ return nullptr;
+ if (!consumeIf('p'))
+ return nullptr;
+ parseCVQualifiers();
+ StringView Num = parseNumber();
+ if (!consumeIf('_'))
+ return nullptr;
+ return make<FunctionParam>(Num);
+ }
+ return nullptr;
+}
+
+// [gs] nw <expression>* _ <type> E # new (expr-list) type
+// [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init)
+// [gs] na <expression>* _ <type> E # new[] (expr-list) type
+// [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init)
+// <initializer> ::= pi <expression>* E # parenthesized initialization
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseNewExpr() {
+ bool Global = consumeIf("gs");
+ bool IsArray = look(1) == 'a';
+ if (!consumeIf("nw") && !consumeIf("na"))
+ return nullptr;
+ size_t Exprs = Names.size();
+ while (!consumeIf('_')) {
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ Names.push_back(Ex);
+ }
+ NodeArray ExprList = popTrailingNodeArray(Exprs);
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ if (consumeIf("pi")) {
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Init = getDerived().parseExpr();
+ if (Init == nullptr)
+ return Init;
+ Names.push_back(Init);
+ }
+ NodeArray Inits = popTrailingNodeArray(InitsBegin);
+ return make<NewExpr>(ExprList, Ty, Inits, Global, IsArray);
+ } else if (!consumeIf('E'))
+ return nullptr;
+ return make<NewExpr>(ExprList, Ty, NodeArray(), Global, IsArray);
+}
+
+// cv <type> <expression> # conversion with one argument
+// cv <type> _ <expression>* E # conversion with a different number of arguments
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseConversionExpr() {
+ if (!consumeIf("cv"))
+ return nullptr;
+ Node *Ty;
+ {
+ SwapAndRestore<bool> SaveTemp(TryToParseTemplateArgs, false);
+ Ty = getDerived().parseType();
+ }
+
+ if (Ty == nullptr)
+ return nullptr;
+
+ if (consumeIf('_')) {
+ size_t ExprsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ Names.push_back(E);
+ }
+ NodeArray Exprs = popTrailingNodeArray(ExprsBegin);
+ return make<ConversionExpr>(Ty, Exprs);
+ }
+
+ Node *E[1] = {getDerived().parseExpr()};
+ if (E[0] == nullptr)
+ return nullptr;
+ return make<ConversionExpr>(Ty, makeNodeArray(E, E + 1));
+}
+
+// <expr-primary> ::= L <type> <value number> E # integer literal
+// ::= L <type> <value float> E # floating literal
+// ::= L <string type> E # string literal
+// ::= L <nullptr type> E # nullptr literal (i.e., "LDnE")
+// FIXME: ::= L <type> <real-part float> _ <imag-part float> E # complex floating point literal (C 2000)
+// ::= L <mangled-name> E # external name
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseExprPrimary() {
+ if (!consumeIf('L'))
+ return nullptr;
+ switch (look()) {
+ case 'w':
+ ++First;
+ return getDerived().parseIntegerLiteral("wchar_t");
+ case 'b':
+ if (consumeIf("b0E"))
+ return make<BoolExpr>(0);
+ if (consumeIf("b1E"))
+ return make<BoolExpr>(1);
+ return nullptr;
+ case 'c':
+ ++First;
+ return getDerived().parseIntegerLiteral("char");
+ case 'a':
+ ++First;
+ return getDerived().parseIntegerLiteral("signed char");
+ case 'h':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned char");
+ case 's':
+ ++First;
+ return getDerived().parseIntegerLiteral("short");
+ case 't':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned short");
+ case 'i':
+ ++First;
+ return getDerived().parseIntegerLiteral("");
+ case 'j':
+ ++First;
+ return getDerived().parseIntegerLiteral("u");
+ case 'l':
+ ++First;
+ return getDerived().parseIntegerLiteral("l");
+ case 'm':
+ ++First;
+ return getDerived().parseIntegerLiteral("ul");
+ case 'x':
+ ++First;
+ return getDerived().parseIntegerLiteral("ll");
+ case 'y':
+ ++First;
+ return getDerived().parseIntegerLiteral("ull");
+ case 'n':
+ ++First;
+ return getDerived().parseIntegerLiteral("__int128");
+ case 'o':
+ ++First;
+ return getDerived().parseIntegerLiteral("unsigned __int128");
+ case 'f':
+ ++First;
+ return getDerived().template parseFloatingLiteral<float>();
+ case 'd':
+ ++First;
+ return getDerived().template parseFloatingLiteral<double>();
+ case 'e':
+ ++First;
+ return getDerived().template parseFloatingLiteral<long double>();
+ case '_':
+ if (consumeIf("_Z")) {
+ Node *R = getDerived().parseEncoding();
+ if (R != nullptr && consumeIf('E'))
+ return R;
+ }
+ return nullptr;
+ case 'T':
+ // Invalid mangled name per
+ // http://sourcerytools.com/pipermail/cxx-abi-dev/2011-August/002422.html
+ return nullptr;
+ default: {
+ // might be named type
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return nullptr;
+ StringView N = parseNumber();
+ if (!N.empty()) {
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<IntegerCastExpr>(T, N);
+ }
+ if (consumeIf('E'))
+ return T;
+ return nullptr;
+ }
+ }
+}
+
+// <braced-expression> ::= <expression>
+// ::= di <field source-name> <braced-expression> # .name = expr
+// ::= dx <index expression> <braced-expression> # [expr] = expr
+// ::= dX <range begin expression> <range end expression> <braced-expression>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseBracedExpr() {
+ if (look() == 'd') {
+ switch (look(1)) {
+ case 'i': {
+ First += 2;
+ Node *Field = getDerived().parseSourceName(/*NameState=*/nullptr);
+ if (Field == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedExpr>(Field, Init, /*isArray=*/false);
+ }
+ case 'x': {
+ First += 2;
+ Node *Index = getDerived().parseExpr();
+ if (Index == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedExpr>(Index, Init, /*isArray=*/true);
+ }
+ case 'X': {
+ First += 2;
+ Node *RangeBegin = getDerived().parseExpr();
+ if (RangeBegin == nullptr)
+ return nullptr;
+ Node *RangeEnd = getDerived().parseExpr();
+ if (RangeEnd == nullptr)
+ return nullptr;
+ Node *Init = getDerived().parseBracedExpr();
+ if (Init == nullptr)
+ return nullptr;
+ return make<BracedRangeExpr>(RangeBegin, RangeEnd, Init);
+ }
+ }
+ }
+ return getDerived().parseExpr();
+}
+
+// (not yet in the spec)
+// <fold-expr> ::= fL <binary-operator-name> <expression> <expression>
+// ::= fR <binary-operator-name> <expression> <expression>
+// ::= fl <binary-operator-name> <expression>
+// ::= fr <binary-operator-name> <expression>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseFoldExpr() {
+ if (!consumeIf('f'))
+ return nullptr;
+
+ char FoldKind = look();
+ bool IsLeftFold, HasInitializer;
+ HasInitializer = FoldKind == 'L' || FoldKind == 'R';
+ if (FoldKind == 'l' || FoldKind == 'L')
+ IsLeftFold = true;
+ else if (FoldKind == 'r' || FoldKind == 'R')
+ IsLeftFold = false;
+ else
+ return nullptr;
+ ++First;
+
+ // FIXME: This map is duplicated in parseOperatorName and parseExpr.
+ StringView OperatorName;
+ if (consumeIf("aa")) OperatorName = "&&";
+ else if (consumeIf("an")) OperatorName = "&";
+ else if (consumeIf("aN")) OperatorName = "&=";
+ else if (consumeIf("aS")) OperatorName = "=";
+ else if (consumeIf("cm")) OperatorName = ",";
+ else if (consumeIf("ds")) OperatorName = ".*";
+ else if (consumeIf("dv")) OperatorName = "/";
+ else if (consumeIf("dV")) OperatorName = "/=";
+ else if (consumeIf("eo")) OperatorName = "^";
+ else if (consumeIf("eO")) OperatorName = "^=";
+ else if (consumeIf("eq")) OperatorName = "==";
+ else if (consumeIf("ge")) OperatorName = ">=";
+ else if (consumeIf("gt")) OperatorName = ">";
+ else if (consumeIf("le")) OperatorName = "<=";
+ else if (consumeIf("ls")) OperatorName = "<<";
+ else if (consumeIf("lS")) OperatorName = "<<=";
+ else if (consumeIf("lt")) OperatorName = "<";
+ else if (consumeIf("mi")) OperatorName = "-";
+ else if (consumeIf("mI")) OperatorName = "-=";
+ else if (consumeIf("ml")) OperatorName = "*";
+ else if (consumeIf("mL")) OperatorName = "*=";
+ else if (consumeIf("ne")) OperatorName = "!=";
+ else if (consumeIf("oo")) OperatorName = "||";
+ else if (consumeIf("or")) OperatorName = "|";
+ else if (consumeIf("oR")) OperatorName = "|=";
+ else if (consumeIf("pl")) OperatorName = "+";
+ else if (consumeIf("pL")) OperatorName = "+=";
+ else if (consumeIf("rm")) OperatorName = "%";
+ else if (consumeIf("rM")) OperatorName = "%=";
+ else if (consumeIf("rs")) OperatorName = ">>";
+ else if (consumeIf("rS")) OperatorName = ">>=";
+ else return nullptr;
+
+ Node *Pack = getDerived().parseExpr(), *Init = nullptr;
+ if (Pack == nullptr)
+ return nullptr;
+ if (HasInitializer) {
+ Init = getDerived().parseExpr();
+ if (Init == nullptr)
+ return nullptr;
+ }
+
+ if (IsLeftFold && Init)
+ std::swap(Pack, Init);
+
+ return make<FoldExpr>(IsLeftFold, OperatorName, Pack, Init);
+}
+
+// <expression> ::= <unary operator-name> <expression>
+// ::= <binary operator-name> <expression> <expression>
+// ::= <ternary operator-name> <expression> <expression> <expression>
+// ::= cl <expression>+ E # call
+// ::= cv <type> <expression> # conversion with one argument
+// ::= cv <type> _ <expression>* E # conversion with a different number of arguments
+// ::= [gs] nw <expression>* _ <type> E # new (expr-list) type
+// ::= [gs] nw <expression>* _ <type> <initializer> # new (expr-list) type (init)
+// ::= [gs] na <expression>* _ <type> E # new[] (expr-list) type
+// ::= [gs] na <expression>* _ <type> <initializer> # new[] (expr-list) type (init)
+// ::= [gs] dl <expression> # delete expression
+// ::= [gs] da <expression> # delete[] expression
+// ::= pp_ <expression> # prefix ++
+// ::= mm_ <expression> # prefix --
+// ::= ti <type> # typeid (type)
+// ::= te <expression> # typeid (expression)
+// ::= dc <type> <expression> # dynamic_cast<type> (expression)
+// ::= sc <type> <expression> # static_cast<type> (expression)
+// ::= cc <type> <expression> # const_cast<type> (expression)
+// ::= rc <type> <expression> # reinterpret_cast<type> (expression)
+// ::= st <type> # sizeof (a type)
+// ::= sz <expression> # sizeof (an expression)
+// ::= at <type> # alignof (a type)
+// ::= az <expression> # alignof (an expression)
+// ::= nx <expression> # noexcept (expression)
+// ::= <template-param>
+// ::= <function-param>
+// ::= dt <expression> <unresolved-name> # expr.name
+// ::= pt <expression> <unresolved-name> # expr->name
+// ::= ds <expression> <expression> # expr.*expr
+// ::= sZ <template-param> # size of a parameter pack
+// ::= sZ <function-param> # size of a function parameter pack
+// ::= sP <template-arg>* E # sizeof...(T), size of a captured template parameter pack from an alias template
+// ::= sp <expression> # pack expansion
+// ::= tw <expression> # throw expression
+// ::= tr # throw with no operand (rethrow)
+// ::= <unresolved-name> # f(p), N::f(p), ::f(p),
+// # freestanding dependent name (e.g., T::x),
+// # objectless nonstatic member reference
+// ::= fL <binary-operator-name> <expression> <expression>
+// ::= fR <binary-operator-name> <expression> <expression>
+// ::= fl <binary-operator-name> <expression>
+// ::= fr <binary-operator-name> <expression>
+// ::= <expr-primary>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseExpr() {
+ bool Global = consumeIf("gs");
+ if (numLeft() < 2)
+ return nullptr;
+
+ switch (*First) {
+ case 'L':
+ return getDerived().parseExprPrimary();
+ case 'T':
+ return getDerived().parseTemplateParam();
+ case 'f': {
+ // Disambiguate a fold expression from a <function-param>.
+ if (look(1) == 'p' || (look(1) == 'L' && std::isdigit(look(2))))
+ return getDerived().parseFunctionParam();
+ return getDerived().parseFoldExpr();
+ }
+ case 'a':
+ switch (First[1]) {
+ case 'a':
+ First += 2;
+ return getDerived().parseBinaryExpr("&&");
+ case 'd':
+ First += 2;
+ return getDerived().parsePrefixExpr("&");
+ case 'n':
+ First += 2;
+ return getDerived().parseBinaryExpr("&");
+ case 'N':
+ First += 2;
+ return getDerived().parseBinaryExpr("&=");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr("=");
+ case 't': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("alignof (", Ty, ")");
+ }
+ case 'z': {
+ First += 2;
+ Node *Ty = getDerived().parseExpr();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("alignof (", Ty, ")");
+ }
+ }
+ return nullptr;
+ case 'c':
+ switch (First[1]) {
+ // cc <type> <expression> # const_cast<type>(expression)
+ case 'c': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("const_cast", Ty, Ex);
+ }
+ // cl <expression>+ E # call
+ case 'l': {
+ First += 2;
+ Node *Callee = getDerived().parseExpr();
+ if (Callee == nullptr)
+ return Callee;
+ size_t ExprsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ Names.push_back(E);
+ }
+ return make<CallExpr>(Callee, popTrailingNodeArray(ExprsBegin));
+ }
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr(",");
+ case 'o':
+ First += 2;
+ return getDerived().parsePrefixExpr("~");
+ case 'v':
+ return getDerived().parseConversionExpr();
+ }
+ return nullptr;
+ case 'd':
+ switch (First[1]) {
+ case 'a': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<DeleteExpr>(Ex, Global, /*is_array=*/true);
+ }
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("dynamic_cast", T, Ex);
+ }
+ case 'e':
+ First += 2;
+ return getDerived().parsePrefixExpr("*");
+ case 'l': {
+ First += 2;
+ Node *E = getDerived().parseExpr();
+ if (E == nullptr)
+ return E;
+ return make<DeleteExpr>(E, Global, /*is_array=*/false);
+ }
+ case 'n':
+ return getDerived().parseUnresolvedName();
+ case 's': {
+ First += 2;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<MemberExpr>(LHS, ".*", RHS);
+ }
+ case 't': {
+ First += 2;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return LHS;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<MemberExpr>(LHS, ".", RHS);
+ }
+ case 'v':
+ First += 2;
+ return getDerived().parseBinaryExpr("/");
+ case 'V':
+ First += 2;
+ return getDerived().parseBinaryExpr("/=");
+ }
+ return nullptr;
+ case 'e':
+ switch (First[1]) {
+ case 'o':
+ First += 2;
+ return getDerived().parseBinaryExpr("^");
+ case 'O':
+ First += 2;
+ return getDerived().parseBinaryExpr("^=");
+ case 'q':
+ First += 2;
+ return getDerived().parseBinaryExpr("==");
+ }
+ return nullptr;
+ case 'g':
+ switch (First[1]) {
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr(">=");
+ case 't':
+ First += 2;
+ return getDerived().parseBinaryExpr(">");
+ }
+ return nullptr;
+ case 'i':
+ switch (First[1]) {
+ case 'x': {
+ First += 2;
+ Node *Base = getDerived().parseExpr();
+ if (Base == nullptr)
+ return nullptr;
+ Node *Index = getDerived().parseExpr();
+ if (Index == nullptr)
+ return Index;
+ return make<ArraySubscriptExpr>(Base, Index);
+ }
+ case 'l': {
+ First += 2;
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseBracedExpr();
+ if (E == nullptr)
+ return nullptr;
+ Names.push_back(E);
+ }
+ return make<InitListExpr>(nullptr, popTrailingNodeArray(InitsBegin));
+ }
+ }
+ return nullptr;
+ case 'l':
+ switch (First[1]) {
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr("<=");
+ case 's':
+ First += 2;
+ return getDerived().parseBinaryExpr("<<");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr("<<=");
+ case 't':
+ First += 2;
+ return getDerived().parseBinaryExpr("<");
+ }
+ return nullptr;
+ case 'm':
+ switch (First[1]) {
+ case 'i':
+ First += 2;
+ return getDerived().parseBinaryExpr("-");
+ case 'I':
+ First += 2;
+ return getDerived().parseBinaryExpr("-=");
+ case 'l':
+ First += 2;
+ return getDerived().parseBinaryExpr("*");
+ case 'L':
+ First += 2;
+ return getDerived().parseBinaryExpr("*=");
+ case 'm':
+ First += 2;
+ if (consumeIf('_'))
+ return getDerived().parsePrefixExpr("--");
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ return make<PostfixExpr>(Ex, "--");
+ }
+ return nullptr;
+ case 'n':
+ switch (First[1]) {
+ case 'a':
+ case 'w':
+ return getDerived().parseNewExpr();
+ case 'e':
+ First += 2;
+ return getDerived().parseBinaryExpr("!=");
+ case 'g':
+ First += 2;
+ return getDerived().parsePrefixExpr("-");
+ case 't':
+ First += 2;
+ return getDerived().parsePrefixExpr("!");
+ case 'x':
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("noexcept (", Ex, ")");
+ }
+ return nullptr;
+ case 'o':
+ switch (First[1]) {
+ case 'n':
+ return getDerived().parseUnresolvedName();
+ case 'o':
+ First += 2;
+ return getDerived().parseBinaryExpr("||");
+ case 'r':
+ First += 2;
+ return getDerived().parseBinaryExpr("|");
+ case 'R':
+ First += 2;
+ return getDerived().parseBinaryExpr("|=");
+ }
+ return nullptr;
+ case 'p':
+ switch (First[1]) {
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr("->*");
+ case 'l':
+ First += 2;
+ return getDerived().parseBinaryExpr("+");
+ case 'L':
+ First += 2;
+ return getDerived().parseBinaryExpr("+=");
+ case 'p': {
+ First += 2;
+ if (consumeIf('_'))
+ return getDerived().parsePrefixExpr("++");
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<PostfixExpr>(Ex, "++");
+ }
+ case 's':
+ First += 2;
+ return getDerived().parsePrefixExpr("+");
+ case 't': {
+ First += 2;
+ Node *L = getDerived().parseExpr();
+ if (L == nullptr)
+ return nullptr;
+ Node *R = getDerived().parseExpr();
+ if (R == nullptr)
+ return nullptr;
+ return make<MemberExpr>(L, "->", R);
+ }
+ }
+ return nullptr;
+ case 'q':
+ if (First[1] == 'u') {
+ First += 2;
+ Node *Cond = getDerived().parseExpr();
+ if (Cond == nullptr)
+ return nullptr;
+ Node *LHS = getDerived().parseExpr();
+ if (LHS == nullptr)
+ return nullptr;
+ Node *RHS = getDerived().parseExpr();
+ if (RHS == nullptr)
+ return nullptr;
+ return make<ConditionalExpr>(Cond, LHS, RHS);
+ }
+ return nullptr;
+ case 'r':
+ switch (First[1]) {
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("reinterpret_cast", T, Ex);
+ }
+ case 'm':
+ First += 2;
+ return getDerived().parseBinaryExpr("%");
+ case 'M':
+ First += 2;
+ return getDerived().parseBinaryExpr("%=");
+ case 's':
+ First += 2;
+ return getDerived().parseBinaryExpr(">>");
+ case 'S':
+ First += 2;
+ return getDerived().parseBinaryExpr(">>=");
+ }
+ return nullptr;
+ case 's':
+ switch (First[1]) {
+ case 'c': {
+ First += 2;
+ Node *T = getDerived().parseType();
+ if (T == nullptr)
+ return T;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<CastExpr>("static_cast", T, Ex);
+ }
+ case 'p': {
+ First += 2;
+ Node *Child = getDerived().parseExpr();
+ if (Child == nullptr)
+ return nullptr;
+ return make<ParameterPackExpansion>(Child);
+ }
+ case 'r':
+ return getDerived().parseUnresolvedName();
+ case 't': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ return make<EnclosingExpr>("sizeof (", Ty, ")");
+ }
+ case 'z': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("sizeof (", Ex, ")");
+ }
+ case 'Z':
+ First += 2;
+ if (look() == 'T') {
+ Node *R = getDerived().parseTemplateParam();
+ if (R == nullptr)
+ return nullptr;
+ return make<SizeofParamPackExpr>(R);
+ } else if (look() == 'f') {
+ Node *FP = getDerived().parseFunctionParam();
+ if (FP == nullptr)
+ return nullptr;
+ return make<EnclosingExpr>("sizeof... (", FP, ")");
+ }
+ return nullptr;
+ case 'P': {
+ First += 2;
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ auto *Pack = make<NodeArrayNode>(popTrailingNodeArray(ArgsBegin));
+ if (!Pack)
+ return nullptr;
+ return make<EnclosingExpr>("sizeof... (", Pack, ")");
+ }
+ }
+ return nullptr;
+ case 't':
+ switch (First[1]) {
+ case 'e': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return Ex;
+ return make<EnclosingExpr>("typeid (", Ex, ")");
+ }
+ case 'i': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return Ty;
+ return make<EnclosingExpr>("typeid (", Ty, ")");
+ }
+ case 'l': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ size_t InitsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *E = getDerived().parseBracedExpr();
+ if (E == nullptr)
+ return nullptr;
+ Names.push_back(E);
+ }
+ return make<InitListExpr>(Ty, popTrailingNodeArray(InitsBegin));
+ }
+ case 'r':
+ First += 2;
+ return make<NameType>("throw");
+ case 'w': {
+ First += 2;
+ Node *Ex = getDerived().parseExpr();
+ if (Ex == nullptr)
+ return nullptr;
+ return make<ThrowExpr>(Ex);
+ }
+ }
+ return nullptr;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ return getDerived().parseUnresolvedName();
+ }
+ return nullptr;
+}
+
+// <call-offset> ::= h <nv-offset> _
+// ::= v <v-offset> _
+//
+// <nv-offset> ::= <offset number>
+// # non-virtual base override
+//
+// <v-offset> ::= <offset number> _ <virtual offset number>
+// # virtual base override, with vcall offset
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parseCallOffset() {
+ // Just scan through the call offset, we never add this information into the
+ // output.
+ if (consumeIf('h'))
+ return parseNumber(true).empty() || !consumeIf('_');
+ if (consumeIf('v'))
+ return parseNumber(true).empty() || !consumeIf('_') ||
+ parseNumber(true).empty() || !consumeIf('_');
+ return true;
+}
+
+// <special-name> ::= TV <type> # virtual table
+// ::= TT <type> # VTT structure (construction vtable index)
+// ::= TI <type> # typeinfo structure
+// ::= TS <type> # typeinfo name (null-terminated byte string)
+// ::= Tc <call-offset> <call-offset> <base encoding>
+// # base is the nominal target function of thunk
+// # first call-offset is 'this' adjustment
+// # second call-offset is result adjustment
+// ::= T <call-offset> <base encoding>
+// # base is the nominal target function of thunk
+// ::= GV <object name> # Guard variable for one-time initialization
+// # No <type>
+// ::= TW <object name> # Thread-local wrapper
+// ::= TH <object name> # Thread-local initialization
+// ::= GR <object name> _ # First temporary
+// ::= GR <object name> <seq-id> _ # Subsequent temporaries
+// extension ::= TC <first type> <number> _ <second type> # construction vtable for second-in-first
+// extension ::= GR <object name> # reference temporary for object
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSpecialName() {
+ switch (look()) {
+ case 'T':
+ switch (look(1)) {
+ // TV <type> # virtual table
+ case 'V': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("vtable for ", Ty);
+ }
+ // TT <type> # VTT structure (construction vtable index)
+ case 'T': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("VTT for ", Ty);
+ }
+ // TI <type> # typeinfo structure
+ case 'I': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("typeinfo for ", Ty);
+ }
+ // TS <type> # typeinfo name (null-terminated byte string)
+ case 'S': {
+ First += 2;
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ return make<SpecialName>("typeinfo name for ", Ty);
+ }
+ // Tc <call-offset> <call-offset> <base encoding>
+ case 'c': {
+ First += 2;
+ if (parseCallOffset() || parseCallOffset())
+ return nullptr;
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr)
+ return nullptr;
+ return make<SpecialName>("covariant return thunk to ", Encoding);
+ }
+ // extension ::= TC <first type> <number> _ <second type>
+ // # construction vtable for second-in-first
+ case 'C': {
+ First += 2;
+ Node *FirstType = getDerived().parseType();
+ if (FirstType == nullptr)
+ return nullptr;
+ if (parseNumber(true).empty() || !consumeIf('_'))
+ return nullptr;
+ Node *SecondType = getDerived().parseType();
+ if (SecondType == nullptr)
+ return nullptr;
+ return make<CtorVtableSpecialName>(SecondType, FirstType);
+ }
+ // TW <object name> # Thread-local wrapper
+ case 'W': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("thread-local wrapper routine for ", Name);
+ }
+ // TH <object name> # Thread-local initialization
+ case 'H': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("thread-local initialization routine for ", Name);
+ }
+ // T <call-offset> <base encoding>
+ default: {
+ ++First;
+ bool IsVirt = look() == 'v';
+ if (parseCallOffset())
+ return nullptr;
+ Node *BaseEncoding = getDerived().parseEncoding();
+ if (BaseEncoding == nullptr)
+ return nullptr;
+ if (IsVirt)
+ return make<SpecialName>("virtual thunk to ", BaseEncoding);
+ else
+ return make<SpecialName>("non-virtual thunk to ", BaseEncoding);
+ }
+ }
+ case 'G':
+ switch (look(1)) {
+ // GV <object name> # Guard variable for one-time initialization
+ case 'V': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ return make<SpecialName>("guard variable for ", Name);
+ }
+ // GR <object name> # reference temporary for object
+ // GR <object name> _ # First temporary
+ // GR <object name> <seq-id> _ # Subsequent temporaries
+ case 'R': {
+ First += 2;
+ Node *Name = getDerived().parseName();
+ if (Name == nullptr)
+ return nullptr;
+ size_t Count;
+ bool ParsedSeqId = !parseSeqId(&Count);
+ if (!consumeIf('_') && ParsedSeqId)
+ return nullptr;
+ return make<SpecialName>("reference temporary for ", Name);
+ }
+ }
+ }
+ return nullptr;
+}
+
+// <encoding> ::= <function name> <bare-function-type>
+// ::= <data name>
+// ::= <special-name>
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseEncoding() {
+ if (look() == 'G' || look() == 'T')
+ return getDerived().parseSpecialName();
+
+ auto IsEndOfEncoding = [&] {
+ // The set of chars that can potentially follow an <encoding> (none of which
+ // can start a <type>). Enumerating these allows us to avoid speculative
+ // parsing.
+ return numLeft() == 0 || look() == 'E' || look() == '.' || look() == '_';
+ };
+
+ NameState NameInfo(this);
+ Node *Name = getDerived().parseName(&NameInfo);
+ if (Name == nullptr)
+ return nullptr;
+
+ if (resolveForwardTemplateRefs(NameInfo))
+ return nullptr;
+
+ if (IsEndOfEncoding())
+ return Name;
+
+ Node *Attrs = nullptr;
+ if (consumeIf("Ua9enable_ifI")) {
+ size_t BeforeArgs = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ Attrs = make<EnableIfAttr>(popTrailingNodeArray(BeforeArgs));
+ if (!Attrs)
+ return nullptr;
+ }
+
+ Node *ReturnType = nullptr;
+ if (!NameInfo.CtorDtorConversion && NameInfo.EndsWithTemplateArgs) {
+ ReturnType = getDerived().parseType();
+ if (ReturnType == nullptr)
+ return nullptr;
+ }
+
+ if (consumeIf('v'))
+ return make<FunctionEncoding>(ReturnType, Name, NodeArray(),
+ Attrs, NameInfo.CVQualifiers,
+ NameInfo.ReferenceQualifier);
+
+ size_t ParamsBegin = Names.size();
+ do {
+ Node *Ty = getDerived().parseType();
+ if (Ty == nullptr)
+ return nullptr;
+ Names.push_back(Ty);
+ } while (!IsEndOfEncoding());
+
+ return make<FunctionEncoding>(ReturnType, Name,
+ popTrailingNodeArray(ParamsBegin),
+ Attrs, NameInfo.CVQualifiers,
+ NameInfo.ReferenceQualifier);
+}
+
+template <class Float>
+struct FloatData;
+
+template <>
+struct FloatData<float>
+{
+ static const size_t mangled_size = 8;
+ static const size_t max_demangled_size = 24;
+ static constexpr const char* spec = "%af";
+};
+
+template <>
+struct FloatData<double>
+{
+ static const size_t mangled_size = 16;
+ static const size_t max_demangled_size = 32;
+ static constexpr const char* spec = "%a";
+};
+
+template <>
+struct FloatData<long double>
+{
+#if defined(__mips__) && defined(__mips_n64) || defined(__aarch64__) || \
+ defined(__wasm__)
+ static const size_t mangled_size = 32;
+#elif defined(__arm__) || defined(__mips__) || defined(__hexagon__)
+ static const size_t mangled_size = 16;
+#else
+ static const size_t mangled_size = 20; // May need to be adjusted to 16 or 24 on other platforms
+#endif
+ static const size_t max_demangled_size = 40;
+ static constexpr const char *spec = "%LaL";
+};
+
+template <typename Alloc, typename Derived>
+template <class Float>
+Node *AbstractManglingParser<Alloc, Derived>::parseFloatingLiteral() {
+ const size_t N = FloatData<Float>::mangled_size;
+ if (numLeft() <= N)
+ return nullptr;
+ StringView Data(First, First + N);
+ for (char C : Data)
+ if (!std::isxdigit(C))
+ return nullptr;
+ First += N;
+ if (!consumeIf('E'))
+ return nullptr;
+ return make<FloatLiteralImpl<Float>>(Data);
+}
+
+// <seq-id> ::= <0-9A-Z>+
+template <typename Alloc, typename Derived>
+bool AbstractManglingParser<Alloc, Derived>::parseSeqId(size_t *Out) {
+ if (!(look() >= '0' && look() <= '9') &&
+ !(look() >= 'A' && look() <= 'Z'))
+ return true;
+
+ size_t Id = 0;
+ while (true) {
+ if (look() >= '0' && look() <= '9') {
+ Id *= 36;
+ Id += static_cast<size_t>(look() - '0');
+ } else if (look() >= 'A' && look() <= 'Z') {
+ Id *= 36;
+ Id += static_cast<size_t>(look() - 'A') + 10;
+ } else {
+ *Out = Id;
+ return false;
+ }
+ ++First;
+ }
+}
+
+// <substitution> ::= S <seq-id> _
+// ::= S_
+// <substitution> ::= Sa # ::std::allocator
+// <substitution> ::= Sb # ::std::basic_string
+// <substitution> ::= Ss # ::std::basic_string < char,
+// ::std::char_traits<char>,
+// ::std::allocator<char> >
+// <substitution> ::= Si # ::std::basic_istream<char, std::char_traits<char> >
+// <substitution> ::= So # ::std::basic_ostream<char, std::char_traits<char> >
+// <substitution> ::= Sd # ::std::basic_iostream<char, std::char_traits<char> >
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseSubstitution() {
+ if (!consumeIf('S'))
+ return nullptr;
+
+ if (std::islower(look())) {
+ Node *SpecialSub;
+ switch (look()) {
+ case 'a':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::allocator);
+ break;
+ case 'b':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::basic_string);
+ break;
+ case 's':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::string);
+ break;
+ case 'i':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::istream);
+ break;
+ case 'o':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::ostream);
+ break;
+ case 'd':
+ ++First;
+ SpecialSub = make<SpecialSubstitution>(SpecialSubKind::iostream);
+ break;
+ default:
+ return nullptr;
+ }
+ if (!SpecialSub)
+ return nullptr;
+ // Itanium C++ ABI 5.1.2: If a name that would use a built-in <substitution>
+ // has ABI tags, the tags are appended to the substitution; the result is a
+ // substitutable component.
+ Node *WithTags = getDerived().parseAbiTags(SpecialSub);
+ if (WithTags != SpecialSub) {
+ Subs.push_back(WithTags);
+ SpecialSub = WithTags;
+ }
+ return SpecialSub;
+ }
+
+ // ::= S_
+ if (consumeIf('_')) {
+ if (Subs.empty())
+ return nullptr;
+ return Subs[0];
+ }
+
+ // ::= S <seq-id> _
+ size_t Index = 0;
+ if (parseSeqId(&Index))
+ return nullptr;
+ ++Index;
+ if (!consumeIf('_') || Index >= Subs.size())
+ return nullptr;
+ return Subs[Index];
+}
+
+// <template-param> ::= T_ # first template parameter
+// ::= T <parameter-2 non-negative number> _
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseTemplateParam() {
+ if (!consumeIf('T'))
+ return nullptr;
+
+ size_t Index = 0;
+ if (!consumeIf('_')) {
+ if (parsePositiveInteger(&Index))
+ return nullptr;
+ ++Index;
+ if (!consumeIf('_'))
+ return nullptr;
+ }
+
+ // Itanium ABI 5.1.8: In a generic lambda, uses of auto in the parameter list
+ // are mangled as the corresponding artificial template type parameter.
+ if (ParsingLambdaParams)
+ return make<NameType>("auto");
+
+ // If we're in a context where this <template-param> refers to a
+ // <template-arg> further ahead in the mangled name (currently just conversion
+ // operator types), then we should only look it up in the right context.
+ if (PermitForwardTemplateReferences) {
+ Node *ForwardRef = make<ForwardTemplateReference>(Index);
+ if (!ForwardRef)
+ return nullptr;
+ assert(ForwardRef->getKind() == Node::KForwardTemplateReference);
+ ForwardTemplateRefs.push_back(
+ static_cast<ForwardTemplateReference *>(ForwardRef));
+ return ForwardRef;
+ }
+
+ if (Index >= TemplateParams.size())
+ return nullptr;
+ return TemplateParams[Index];
+}
+
+// <template-arg> ::= <type> # type or template
+// ::= X <expression> E # expression
+// ::= <expr-primary> # simple expressions
+// ::= J <template-arg>* E # argument pack
+// ::= LZ <encoding> E # extension
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parseTemplateArg() {
+ switch (look()) {
+ case 'X': {
+ ++First;
+ Node *Arg = getDerived().parseExpr();
+ if (Arg == nullptr || !consumeIf('E'))
+ return nullptr;
+ return Arg;
+ }
+ case 'J': {
+ ++First;
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ NodeArray Args = popTrailingNodeArray(ArgsBegin);
+ return make<TemplateArgumentPack>(Args);
+ }
+ case 'L': {
+ // ::= LZ <encoding> E # extension
+ if (look(1) == 'Z') {
+ First += 2;
+ Node *Arg = getDerived().parseEncoding();
+ if (Arg == nullptr || !consumeIf('E'))
+ return nullptr;
+ return Arg;
+ }
+ // ::= <expr-primary> # simple expressions
+ return getDerived().parseExprPrimary();
+ }
+ default:
+ return getDerived().parseType();
+ }
+}
+
+// <template-args> ::= I <template-arg>* E
+// extension, the abi says <template-arg>+
+template <typename Derived, typename Alloc>
+Node *
+AbstractManglingParser<Derived, Alloc>::parseTemplateArgs(bool TagTemplates) {
+ if (!consumeIf('I'))
+ return nullptr;
+
+ // <template-params> refer to the innermost <template-args>. Clear out any
+ // outer args that we may have inserted into TemplateParams.
+ if (TagTemplates)
+ TemplateParams.clear();
+
+ size_t ArgsBegin = Names.size();
+ while (!consumeIf('E')) {
+ if (TagTemplates) {
+ auto OldParams = std::move(TemplateParams);
+ Node *Arg = getDerived().parseTemplateArg();
+ TemplateParams = std::move(OldParams);
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ Node *TableEntry = Arg;
+ if (Arg->getKind() == Node::KTemplateArgumentPack) {
+ TableEntry = make<ParameterPack>(
+ static_cast<TemplateArgumentPack*>(TableEntry)->getElements());
+ if (!TableEntry)
+ return nullptr;
+ }
+ TemplateParams.push_back(TableEntry);
+ } else {
+ Node *Arg = getDerived().parseTemplateArg();
+ if (Arg == nullptr)
+ return nullptr;
+ Names.push_back(Arg);
+ }
+ }
+ return make<TemplateArgs>(popTrailingNodeArray(ArgsBegin));
+}
+
+// <mangled-name> ::= _Z <encoding>
+// ::= <type>
+// extension ::= ___Z <encoding> _block_invoke
+// extension ::= ___Z <encoding> _block_invoke<decimal-digit>+
+// extension ::= ___Z <encoding> _block_invoke_<decimal-digit>+
+template <typename Derived, typename Alloc>
+Node *AbstractManglingParser<Derived, Alloc>::parse() {
+ if (consumeIf("_Z") || consumeIf("__Z")) {
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr)
+ return nullptr;
+ if (look() == '.') {
+ Encoding = make<DotSuffix>(Encoding, StringView(First, Last));
+ First = Last;
+ }
+ if (numLeft() != 0)
+ return nullptr;
+ return Encoding;
+ }
+
+ if (consumeIf("___Z") || consumeIf("____Z")) {
+ Node *Encoding = getDerived().parseEncoding();
+ if (Encoding == nullptr || !consumeIf("_block_invoke"))
+ return nullptr;
+ bool RequireNumber = consumeIf('_');
+ if (parseNumber().empty() && RequireNumber)
+ return nullptr;
+ if (look() == '.')
+ First = Last;
+ if (numLeft() != 0)
+ return nullptr;
+ return make<SpecialName>("invocation function for block in ", Encoding);
+ }
+
+ Node *Ty = getDerived().parseType();
+ if (numLeft() != 0)
+ return nullptr;
+ return Ty;
+}
+
+template <typename Alloc>
+struct ManglingParser : AbstractManglingParser<ManglingParser<Alloc>, Alloc> {
+ using AbstractManglingParser<ManglingParser<Alloc>,
+ Alloc>::AbstractManglingParser;
+};
+
+DEMANGLE_NAMESPACE_END
+
+#endif // DEMANGLE_ITANIUMDEMANGLE_H
Index: contrib/libcxxabi/src/demangle/README.txt
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/README.txt
@@ -0,0 +1,52 @@
+Itanium Name Demangler Library
+==============================
+
+Introduction
+------------
+
+This directory contains the generic itanium name demangler library. The main
+purpose of the library is to demangle C++ symbols, i.e. convert the string
+"_Z1fv" into "f()". You can also use the CRTP base ManglingParser to perform
+some simple analysis on the mangled name, or (in LLVM) use the opaque
+ItaniumPartialDemangler to query the demangled AST.
+
+Why are there multiple copies of the this library in the source tree?
+---------------------------------------------------------------------
+
+This directory is mirrored between libcxxabi/demangle and
+llvm/include/llvm/Demangle. The simple reason for this is that both projects
+need to demangle symbols, but neither can depend on each other. libcxxabi needs
+the demangler to implement __cxa_demangle, which is part of the itanium ABI
+spec. LLVM needs a copy for a bunch of places, but doesn't want to use the
+system's __cxa_demangle because it a) might not be available (i.e., on Windows),
+and b) probably isn't that up-to-date on the latest language features.
+
+The copy of the demangler in LLVM has some extra stuff that aren't needed in
+libcxxabi (ie, the MSVC demangler, ItaniumPartialDemangler), which depend on the
+shared generic components. Despite these differences, we want to keep the "core"
+generic demangling library identical between both copies to simplify development
+and testing.
+
+If you're working on the generic library, then do the work first in libcxxabi,
+then run the cp-to-llvm.sh script in src/demangle. This script takes as an
+argument the path to llvm, and re-copies the changes you made to libcxxabi over.
+Note that this script just blindly overwrites all changes to the generic library
+in llvm, so be careful.
+
+Because the core demangler needs to work in libcxxabi, everything needs to be
+declared in an anonymous namespace (see DEMANGLE_NAMESPACE_BEGIN), and you can't
+introduce any code that depends on the libcxx dylib.
+
+Hopefully, when LLVM becomes a monorepo, we can de-duplicate this code, and have
+both LLVM and libcxxabi depend on a shared demangler library.
+
+Testing
+-------
+
+The tests are split up between libcxxabi/test/{unit,}test_demangle.cpp, and
+llvm/unittest/Demangle. The llvm directory should only get tests for stuff not
+included in the core library. In the future though, we should probably move all
+the tests to LLVM.
+
+It is also a really good idea to run libFuzzer after non-trivial changes, see
+libcxxabi/fuzz/cxa_demangle_fuzzer.cpp and https://llvm.org/docs/LibFuzzer.html.
Index: contrib/libcxxabi/src/demangle/StringView.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/StringView.h
@@ -0,0 +1,126 @@
+//===--- StringView.h -------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// FIXME: Use std::string_view instead when we support C++17.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_STRINGVIEW_H
+#define DEMANGLE_STRINGVIEW_H
+
+#include "DemangleConfig.h"
+#include <algorithm>
+#include <cassert>
+#include <cstring>
+
+DEMANGLE_NAMESPACE_BEGIN
+
+class StringView {
+ const char *First;
+ const char *Last;
+
+public:
+ static const size_t npos = ~size_t(0);
+
+ template <size_t N>
+ StringView(const char (&Str)[N]) : First(Str), Last(Str + N - 1) {}
+ StringView(const char *First_, const char *Last_)
+ : First(First_), Last(Last_) {}
+ StringView(const char *First_, size_t Len)
+ : First(First_), Last(First_ + Len) {}
+ StringView(const char *Str) : First(Str), Last(Str + std::strlen(Str)) {}
+ StringView() : First(nullptr), Last(nullptr) {}
+
+ StringView substr(size_t From) const {
+ return StringView(begin() + From, size() - From);
+ }
+
+ size_t find(char C, size_t From = 0) const {
+ size_t FindBegin = std::min(From, size());
+ // Avoid calling memchr with nullptr.
+ if (FindBegin < size()) {
+ // Just forward to memchr, which is faster than a hand-rolled loop.
+ if (const void *P = ::memchr(First + FindBegin, C, size() - FindBegin))
+ return size_t(static_cast<const char *>(P) - First);
+ }
+ return npos;
+ }
+
+ StringView substr(size_t From, size_t To) const {
+ if (To >= size())
+ To = size() - 1;
+ if (From >= size())
+ From = size() - 1;
+ return StringView(First + From, First + To);
+ }
+
+ StringView dropFront(size_t N = 1) const {
+ if (N >= size())
+ N = size();
+ return StringView(First + N, Last);
+ }
+
+ StringView dropBack(size_t N = 1) const {
+ if (N >= size())
+ N = size();
+ return StringView(First, Last - N);
+ }
+
+ char front() const {
+ assert(!empty());
+ return *begin();
+ }
+
+ char back() const {
+ assert(!empty());
+ return *(end() - 1);
+ }
+
+ char popFront() {
+ assert(!empty());
+ return *First++;
+ }
+
+ bool consumeFront(char C) {
+ if (!startsWith(C))
+ return false;
+ *this = dropFront(1);
+ return true;
+ }
+
+ bool consumeFront(StringView S) {
+ if (!startsWith(S))
+ return false;
+ *this = dropFront(S.size());
+ return true;
+ }
+
+ bool startsWith(char C) const { return !empty() && *begin() == C; }
+
+ bool startsWith(StringView Str) const {
+ if (Str.size() > size())
+ return false;
+ return std::equal(Str.begin(), Str.end(), begin());
+ }
+
+ const char &operator[](size_t Idx) const { return *(begin() + Idx); }
+
+ const char *begin() const { return First; }
+ const char *end() const { return Last; }
+ size_t size() const { return static_cast<size_t>(Last - First); }
+ bool empty() const { return First == Last; }
+};
+
+inline bool operator==(const StringView &LHS, const StringView &RHS) {
+ return LHS.size() == RHS.size() &&
+ std::equal(LHS.begin(), LHS.end(), RHS.begin());
+}
+
+DEMANGLE_NAMESPACE_END
+
+#endif
Index: contrib/libcxxabi/src/demangle/Utility.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/Utility.h
@@ -0,0 +1,191 @@
+//===--- Utility.h ----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Provide some utility classes for use in the demangler(s).
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DEMANGLE_UTILITY_H
+#define DEMANGLE_UTILITY_H
+
+#include "StringView.h"
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <iterator>
+#include <limits>
+
+DEMANGLE_NAMESPACE_BEGIN
+
+// Stream that AST nodes write their string representation into after the AST
+// has been parsed.
+class OutputStream {
+ char *Buffer;
+ size_t CurrentPosition;
+ size_t BufferCapacity;
+
+ // Ensure there is at least n more positions in buffer.
+ void grow(size_t N) {
+ if (N + CurrentPosition >= BufferCapacity) {
+ BufferCapacity *= 2;
+ if (BufferCapacity < N + CurrentPosition)
+ BufferCapacity = N + CurrentPosition;
+ Buffer = static_cast<char *>(std::realloc(Buffer, BufferCapacity));
+ if (Buffer == nullptr)
+ std::terminate();
+ }
+ }
+
+ void writeUnsigned(uint64_t N, bool isNeg = false) {
+ // Handle special case...
+ if (N == 0) {
+ *this << '0';
+ return;
+ }
+
+ char Temp[21];
+ char *TempPtr = std::end(Temp);
+
+ while (N) {
+ *--TempPtr = '0' + char(N % 10);
+ N /= 10;
+ }
+
+ // Add negative sign...
+ if (isNeg)
+ *--TempPtr = '-';
+ this->operator<<(StringView(TempPtr, std::end(Temp)));
+ }
+
+public:
+ OutputStream(char *StartBuf, size_t Size)
+ : Buffer(StartBuf), CurrentPosition(0), BufferCapacity(Size) {}
+ OutputStream() = default;
+ void reset(char *Buffer_, size_t BufferCapacity_) {
+ CurrentPosition = 0;
+ Buffer = Buffer_;
+ BufferCapacity = BufferCapacity_;
+ }
+
+ /// If a ParameterPackExpansion (or similar type) is encountered, the offset
+ /// into the pack that we're currently printing.
+ unsigned CurrentPackIndex = std::numeric_limits<unsigned>::max();
+ unsigned CurrentPackMax = std::numeric_limits<unsigned>::max();
+
+ OutputStream &operator+=(StringView R) {
+ size_t Size = R.size();
+ if (Size == 0)
+ return *this;
+ grow(Size);
+ std::memmove(Buffer + CurrentPosition, R.begin(), Size);
+ CurrentPosition += Size;
+ return *this;
+ }
+
+ OutputStream &operator+=(char C) {
+ grow(1);
+ Buffer[CurrentPosition++] = C;
+ return *this;
+ }
+
+ OutputStream &operator<<(StringView R) { return (*this += R); }
+
+ OutputStream &operator<<(char C) { return (*this += C); }
+
+ OutputStream &operator<<(long long N) {
+ if (N < 0)
+ writeUnsigned(static_cast<unsigned long long>(-N), true);
+ else
+ writeUnsigned(static_cast<unsigned long long>(N));
+ return *this;
+ }
+
+ OutputStream &operator<<(unsigned long long N) {
+ writeUnsigned(N, false);
+ return *this;
+ }
+
+ OutputStream &operator<<(long N) {
+ return this->operator<<(static_cast<long long>(N));
+ }
+
+ OutputStream &operator<<(unsigned long N) {
+ return this->operator<<(static_cast<unsigned long long>(N));
+ }
+
+ OutputStream &operator<<(int N) {
+ return this->operator<<(static_cast<long long>(N));
+ }
+
+ OutputStream &operator<<(unsigned int N) {
+ return this->operator<<(static_cast<unsigned long long>(N));
+ }
+
+ size_t getCurrentPosition() const { return CurrentPosition; }
+ void setCurrentPosition(size_t NewPos) { CurrentPosition = NewPos; }
+
+ char back() const {
+ return CurrentPosition ? Buffer[CurrentPosition - 1] : '\0';
+ }
+
+ bool empty() const { return CurrentPosition == 0; }
+
+ char *getBuffer() { return Buffer; }
+ char *getBufferEnd() { return Buffer + CurrentPosition - 1; }
+ size_t getBufferCapacity() { return BufferCapacity; }
+};
+
+template <class T> class SwapAndRestore {
+ T &Restore;
+ T OriginalValue;
+ bool ShouldRestore = true;
+
+public:
+ SwapAndRestore(T &Restore_) : SwapAndRestore(Restore_, Restore_) {}
+
+ SwapAndRestore(T &Restore_, T NewVal)
+ : Restore(Restore_), OriginalValue(Restore) {
+ Restore = std::move(NewVal);
+ }
+ ~SwapAndRestore() {
+ if (ShouldRestore)
+ Restore = std::move(OriginalValue);
+ }
+
+ void shouldRestore(bool ShouldRestore_) { ShouldRestore = ShouldRestore_; }
+
+ void restoreNow(bool Force) {
+ if (!Force && !ShouldRestore)
+ return;
+
+ Restore = std::move(OriginalValue);
+ ShouldRestore = false;
+ }
+
+ SwapAndRestore(const SwapAndRestore &) = delete;
+ SwapAndRestore &operator=(const SwapAndRestore &) = delete;
+};
+
+inline bool initializeOutputStream(char *Buf, size_t *N, OutputStream &S,
+ size_t InitSize) {
+ size_t BufferSize;
+ if (Buf == nullptr) {
+ Buf = static_cast<char *>(std::malloc(InitSize));
+ if (Buf == nullptr)
+ return false;
+ BufferSize = InitSize;
+ } else
+ BufferSize = *N;
+
+ S.reset(Buf, BufferSize);
+ return true;
+}
+
+DEMANGLE_NAMESPACE_END
+
+#endif
Index: contrib/libcxxabi/src/demangle/cp-to-llvm.sh
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/demangle/cp-to-llvm.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# Copies the 'demangle' library, excluding 'DemangleConfig.h', to llvm. If no
+# llvm directory is specified, then assume a monorepo layout.
+
+set -e
+
+FILES="ItaniumDemangle.h StringView.h Utility.h README.txt"
+LLVM_DEMANGLE_DIR=$1
+
+if [[ -z "$LLVM_DEMANGLE_DIR" ]]; then
+ LLVM_DEMANGLE_DIR="../../../llvm/include/llvm/Demangle"
+fi
+
+if [[ ! -d "$LLVM_DEMANGLE_DIR" ]]; then
+ echo "No such directory: $LLVM_DEMANGLE_DIR" >&2
+ exit 1
+fi
+
+read -p "This will overwrite the copies of $FILES in $LLVM_DEMANGLE_DIR; are you sure? [y/N]" -n 1 -r ANSWER
+echo
+
+if [[ $ANSWER =~ ^[Yy]$ ]]; then
+ for I in $FILES ; do
+ cp $I $LLVM_DEMANGLE_DIR/$I
+ done
+fi
Index: contrib/libcxxabi/src/fallback_malloc.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/fallback_malloc.h
@@ -0,0 +1,28 @@
+//===------------------------- fallback_malloc.h --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _FALLBACK_MALLOC_H
+#define _FALLBACK_MALLOC_H
+
+#include "__cxxabi_config.h"
+#include <cstddef> // for size_t
+
+namespace __cxxabiv1 {
+
+// Allocate some memory from _somewhere_
+_LIBCXXABI_HIDDEN void * __aligned_malloc_with_fallback(size_t size);
+
+// Allocate and zero-initialize memory from _somewhere_
+_LIBCXXABI_HIDDEN void * __calloc_with_fallback(size_t count, size_t size);
+
+_LIBCXXABI_HIDDEN void __aligned_free_with_fallback(void *ptr);
+_LIBCXXABI_HIDDEN void __free_with_fallback(void *ptr);
+
+} // namespace __cxxabiv1
+
+#endif
Index: contrib/libcxxabi/src/fallback_malloc.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/fallback_malloc.cpp
@@ -0,0 +1,254 @@
+//===------------------------ fallback_malloc.cpp -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// Define _LIBCPP_BUILDING_LIBRARY to ensure _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+// is only defined when libc aligned allocation is not available.
+#define _LIBCPP_BUILDING_LIBRARY
+#include "fallback_malloc.h"
+
+#include <__threading_support>
+
+#include <cstdlib> // for malloc, calloc, free
+#include <cstring> // for memset
+
+// A small, simple heap manager based (loosely) on
+// the startup heap manager from FreeBSD, optimized for space.
+//
+// Manages a fixed-size memory pool, supports malloc and free only.
+// No support for realloc.
+//
+// Allocates chunks in multiples of four bytes, with a four byte header
+// for each chunk. The overhead of each chunk is kept low by keeping pointers
+// as two byte offsets within the heap, rather than (4 or 8 byte) pointers.
+
+namespace {
+
+// When POSIX threads are not available, make the mutex operations a nop
+#ifndef _LIBCXXABI_HAS_NO_THREADS
+_LIBCPP_SAFE_STATIC
+static std::__libcpp_mutex_t heap_mutex = _LIBCPP_MUTEX_INITIALIZER;
+#else
+static void* heap_mutex = 0;
+#endif
+
+class mutexor {
+public:
+#ifndef _LIBCXXABI_HAS_NO_THREADS
+ mutexor(std::__libcpp_mutex_t* m) : mtx_(m) {
+ std::__libcpp_mutex_lock(mtx_);
+ }
+ ~mutexor() { std::__libcpp_mutex_unlock(mtx_); }
+#else
+ mutexor(void*) {}
+ ~mutexor() {}
+#endif
+private:
+ mutexor(const mutexor& rhs);
+ mutexor& operator=(const mutexor& rhs);
+#ifndef _LIBCXXABI_HAS_NO_THREADS
+ std::__libcpp_mutex_t* mtx_;
+#endif
+};
+
+static const size_t HEAP_SIZE = 512;
+char heap[HEAP_SIZE] __attribute__((aligned));
+
+typedef unsigned short heap_offset;
+typedef unsigned short heap_size;
+
+struct heap_node {
+ heap_offset next_node; // offset into heap
+ heap_size len; // size in units of "sizeof(heap_node)"
+};
+
+static const heap_node* list_end =
+ (heap_node*)(&heap[HEAP_SIZE]); // one past the end of the heap
+static heap_node* freelist = NULL;
+
+heap_node* node_from_offset(const heap_offset offset) {
+ return (heap_node*)(heap + (offset * sizeof(heap_node)));
+}
+
+heap_offset offset_from_node(const heap_node* ptr) {
+ return static_cast<heap_offset>(
+ static_cast<size_t>(reinterpret_cast<const char*>(ptr) - heap) /
+ sizeof(heap_node));
+}
+
+void init_heap() {
+ freelist = (heap_node*)heap;
+ freelist->next_node = offset_from_node(list_end);
+ freelist->len = HEAP_SIZE / sizeof(heap_node);
+}
+
+// How big a chunk we allocate
+size_t alloc_size(size_t len) {
+ return (len + sizeof(heap_node) - 1) / sizeof(heap_node) + 1;
+}
+
+bool is_fallback_ptr(void* ptr) {
+ return ptr >= heap && ptr < (heap + HEAP_SIZE);
+}
+
+void* fallback_malloc(size_t len) {
+ heap_node *p, *prev;
+ const size_t nelems = alloc_size(len);
+ mutexor mtx(&heap_mutex);
+
+ if (NULL == freelist)
+ init_heap();
+
+ // Walk the free list, looking for a "big enough" chunk
+ for (p = freelist, prev = 0; p && p != list_end;
+ prev = p, p = node_from_offset(p->next_node)) {
+
+ if (p->len > nelems) { // chunk is larger, shorten, and return the tail
+ heap_node* q;
+
+ p->len = static_cast<heap_size>(p->len - nelems);
+ q = p + p->len;
+ q->next_node = 0;
+ q->len = static_cast<heap_size>(nelems);
+ return (void*)(q + 1);
+ }
+
+ if (p->len == nelems) { // exact size match
+ if (prev == 0)
+ freelist = node_from_offset(p->next_node);
+ else
+ prev->next_node = p->next_node;
+ p->next_node = 0;
+ return (void*)(p + 1);
+ }
+ }
+ return NULL; // couldn't find a spot big enough
+}
+
+// Return the start of the next block
+heap_node* after(struct heap_node* p) { return p + p->len; }
+
+void fallback_free(void* ptr) {
+ struct heap_node* cp = ((struct heap_node*)ptr) - 1; // retrieve the chunk
+ struct heap_node *p, *prev;
+
+ mutexor mtx(&heap_mutex);
+
+#ifdef DEBUG_FALLBACK_MALLOC
+ std::cout << "Freeing item at " << offset_from_node(cp) << " of size "
+ << cp->len << std::endl;
+#endif
+
+ for (p = freelist, prev = 0; p && p != list_end;
+ prev = p, p = node_from_offset(p->next_node)) {
+#ifdef DEBUG_FALLBACK_MALLOC
+ std::cout << " p, cp, after (p), after(cp) " << offset_from_node(p) << ' '
+ << offset_from_node(cp) << ' ' << offset_from_node(after(p))
+ << ' ' << offset_from_node(after(cp)) << std::endl;
+#endif
+ if (after(p) == cp) {
+#ifdef DEBUG_FALLBACK_MALLOC
+ std::cout << " Appending onto chunk at " << offset_from_node(p)
+ << std::endl;
+#endif
+ p->len = static_cast<heap_size>(
+ p->len + cp->len); // make the free heap_node larger
+ return;
+ } else if (after(cp) == p) { // there's a free heap_node right after
+#ifdef DEBUG_FALLBACK_MALLOC
+ std::cout << " Appending free chunk at " << offset_from_node(p)
+ << std::endl;
+#endif
+ cp->len = static_cast<heap_size>(cp->len + p->len);
+ if (prev == 0) {
+ freelist = cp;
+ cp->next_node = p->next_node;
+ } else
+ prev->next_node = offset_from_node(cp);
+ return;
+ }
+ }
+// Nothing to merge with, add it to the start of the free list
+#ifdef DEBUG_FALLBACK_MALLOC
+ std::cout << " Making new free list entry " << offset_from_node(cp)
+ << std::endl;
+#endif
+ cp->next_node = offset_from_node(freelist);
+ freelist = cp;
+}
+
+#ifdef INSTRUMENT_FALLBACK_MALLOC
+size_t print_free_list() {
+ struct heap_node *p, *prev;
+ heap_size total_free = 0;
+ if (NULL == freelist)
+ init_heap();
+
+ for (p = freelist, prev = 0; p && p != list_end;
+ prev = p, p = node_from_offset(p->next_node)) {
+ std::cout << (prev == 0 ? "" : " ") << "Offset: " << offset_from_node(p)
+ << "\tsize: " << p->len << " Next: " << p->next_node << std::endl;
+ total_free += p->len;
+ }
+ std::cout << "Total Free space: " << total_free << std::endl;
+ return total_free;
+}
+#endif
+} // end unnamed namespace
+
+namespace __cxxabiv1 {
+
+struct __attribute__((aligned)) __aligned_type {};
+
+void* __aligned_malloc_with_fallback(size_t size) {
+#if defined(_WIN32)
+ if (void* dest = _aligned_malloc(size, alignof(__aligned_type)))
+ return dest;
+#elif defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
+ if (void* dest = std::malloc(size))
+ return dest;
+#else
+ if (size == 0)
+ size = 1;
+ void* dest;
+ if (::posix_memalign(&dest, __alignof(__aligned_type), size) == 0)
+ return dest;
+#endif
+ return fallback_malloc(size);
+}
+
+void* __calloc_with_fallback(size_t count, size_t size) {
+ void* ptr = std::calloc(count, size);
+ if (NULL != ptr)
+ return ptr;
+ // if calloc fails, fall back to emergency stash
+ ptr = fallback_malloc(size * count);
+ if (NULL != ptr)
+ std::memset(ptr, 0, size * count);
+ return ptr;
+}
+
+void __aligned_free_with_fallback(void* ptr) {
+ if (is_fallback_ptr(ptr))
+ fallback_free(ptr);
+ else {
+#if defined(_WIN32)
+ ::_aligned_free(ptr);
+#else
+ std::free(ptr);
+#endif
+ }
+}
+
+void __free_with_fallback(void* ptr) {
+ if (is_fallback_ptr(ptr))
+ fallback_free(ptr);
+ else
+ std::free(ptr);
+}
+
+} // namespace __cxxabiv1
Index: contrib/libcxxabi/src/include/atomic_support.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/include/atomic_support.h
@@ -0,0 +1,180 @@
+//===----------------------------------------------------------------------===////
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===////
+
+// FIXME: This file is copied from libcxx/src/include/atomic_support.h. Instead
+// of duplicating the file in libc++abi we should require that the libc++
+// sources are available when building libc++abi.
+
+#ifndef ATOMIC_SUPPORT_H
+#define ATOMIC_SUPPORT_H
+
+#include "__config"
+#include "memory" // for __libcpp_relaxed_load
+
+#if defined(__clang__) && __has_builtin(__atomic_load_n) \
+ && __has_builtin(__atomic_store_n) \
+ && __has_builtin(__atomic_add_fetch) \
+ && __has_builtin(__atomic_exchange_n) \
+ && __has_builtin(__atomic_compare_exchange_n) \
+ && defined(__ATOMIC_RELAXED) \
+ && defined(__ATOMIC_CONSUME) \
+ && defined(__ATOMIC_ACQUIRE) \
+ && defined(__ATOMIC_RELEASE) \
+ && defined(__ATOMIC_ACQ_REL) \
+ && defined(__ATOMIC_SEQ_CST)
+# define _LIBCXXABI_HAS_ATOMIC_BUILTINS
+#elif !defined(__clang__) && defined(_GNUC_VER) && _GNUC_VER >= 407
+# define _LIBCXXABI_HAS_ATOMIC_BUILTINS
+#endif
+
+#if !defined(_LIBCXXABI_HAS_ATOMIC_BUILTINS) && !defined(_LIBCXXABI_HAS_NO_THREADS)
+# if defined(_LIBCPP_WARNING)
+ _LIBCPP_WARNING("Building libc++ without __atomic builtins is unsupported")
+# else
+# warning Building libc++ without __atomic builtins is unsupported
+# endif
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace {
+
+#if defined(_LIBCXXABI_HAS_ATOMIC_BUILTINS) && !defined(_LIBCXXABI_HAS_NO_THREADS)
+
+enum __libcpp_atomic_order {
+ _AO_Relaxed = __ATOMIC_RELAXED,
+ _AO_Consume = __ATOMIC_CONSUME,
+ _AO_Acquire = __ATOMIC_ACQUIRE,
+ _AO_Release = __ATOMIC_RELEASE,
+ _AO_Acq_Rel = __ATOMIC_ACQ_REL,
+ _AO_Seq = __ATOMIC_SEQ_CST
+};
+
+template <class _ValueType, class _FromType>
+inline _LIBCPP_INLINE_VISIBILITY
+void __libcpp_atomic_store(_ValueType* __dest, _FromType __val,
+ int __order = _AO_Seq)
+{
+ __atomic_store_n(__dest, __val, __order);
+}
+
+template <class _ValueType, class _FromType>
+inline _LIBCPP_INLINE_VISIBILITY
+void __libcpp_relaxed_store(_ValueType* __dest, _FromType __val)
+{
+ __atomic_store_n(__dest, __val, _AO_Relaxed);
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_load(_ValueType const* __val,
+ int __order = _AO_Seq)
+{
+ return __atomic_load_n(__val, __order);
+}
+
+template <class _ValueType, class _AddType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_add(_ValueType* __val, _AddType __a,
+ int __order = _AO_Seq)
+{
+ return __atomic_add_fetch(__val, __a, __order);
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_exchange(_ValueType* __target,
+ _ValueType __value, int __order = _AO_Seq)
+{
+ return __atomic_exchange_n(__target, __value, __order);
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+bool __libcpp_atomic_compare_exchange(_ValueType* __val,
+ _ValueType* __expected, _ValueType __after,
+ int __success_order = _AO_Seq,
+ int __fail_order = _AO_Seq)
+{
+ return __atomic_compare_exchange_n(__val, __expected, __after, true,
+ __success_order, __fail_order);
+}
+
+#else // _LIBCPP_HAS_NO_THREADS
+
+enum __libcpp_atomic_order {
+ _AO_Relaxed,
+ _AO_Consume,
+ _AO_Acquire,
+ _AO_Release,
+ _AO_Acq_Rel,
+ _AO_Seq
+};
+
+template <class _ValueType, class _FromType>
+inline _LIBCPP_INLINE_VISIBILITY
+void __libcpp_atomic_store(_ValueType* __dest, _FromType __val,
+ int = 0)
+{
+ *__dest = __val;
+}
+
+template <class _ValueType, class _FromType>
+inline _LIBCPP_INLINE_VISIBILITY
+void __libcpp_relaxed_store(_ValueType* __dest, _FromType __val)
+{
+ *__dest = __val;
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_load(_ValueType const* __val,
+ int = 0)
+{
+ return *__val;
+}
+
+template <class _ValueType, class _AddType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_add(_ValueType* __val, _AddType __a,
+ int = 0)
+{
+ return *__val += __a;
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+_ValueType __libcpp_atomic_exchange(_ValueType* __target,
+ _ValueType __value, int __order = _AO_Seq)
+{
+ _ValueType old = *__target;
+ *__target = __value;
+ return old;
+}
+
+template <class _ValueType>
+inline _LIBCPP_INLINE_VISIBILITY
+bool __libcpp_atomic_compare_exchange(_ValueType* __val,
+ _ValueType* __expected, _ValueType __after,
+ int = 0, int = 0)
+{
+ if (*__val == *__expected) {
+ *__val = __after;
+ return true;
+ }
+ *__expected = *__val;
+ return false;
+}
+
+#endif // _LIBCPP_HAS_NO_THREADS
+
+} // end namespace
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // ATOMIC_SUPPORT_H
Index: contrib/libcxxabi/src/include/refstring.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/include/refstring.h
@@ -0,0 +1,131 @@
+//===------------------------ __refstring ---------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// FIXME: This file is copied from libcxx/src/include/refstring.h. Instead of
+// duplicating the file in libc++abi we should require that the libc++ sources
+// are available when building libc++abi.
+
+#ifndef _LIBCPPABI_REFSTRING_H
+#define _LIBCPPABI_REFSTRING_H
+
+#include <__config>
+#include <stdexcept>
+#include <cstddef>
+#include <cstring>
+#ifdef __APPLE__
+#include <dlfcn.h>
+#include <mach-o/dyld.h>
+#endif
+#include "atomic_support.h"
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace __refstring_imp { namespace {
+typedef int count_t;
+
+struct _Rep_base {
+ std::size_t len;
+ std::size_t cap;
+ count_t count;
+};
+
+inline _Rep_base* rep_from_data(const char *data_) noexcept {
+ char *data = const_cast<char *>(data_);
+ return reinterpret_cast<_Rep_base *>(data - sizeof(_Rep_base));
+}
+
+inline char * data_from_rep(_Rep_base *rep) noexcept {
+ char *data = reinterpret_cast<char *>(rep);
+ return data + sizeof(*rep);
+}
+
+#if defined(__APPLE__)
+inline
+const char* compute_gcc_empty_string_storage() _NOEXCEPT
+{
+ void* handle = dlopen("/usr/lib/libstdc++.6.dylib", RTLD_NOLOAD);
+ if (handle == nullptr)
+ return nullptr;
+ void* sym = dlsym(handle, "_ZNSs4_Rep20_S_empty_rep_storageE");
+ if (sym == nullptr)
+ return nullptr;
+ return data_from_rep(reinterpret_cast<_Rep_base *>(sym));
+}
+
+inline
+const char*
+get_gcc_empty_string_storage() _NOEXCEPT
+{
+ static const char* p = compute_gcc_empty_string_storage();
+ return p;
+}
+#endif
+
+}} // namespace __refstring_imp
+
+using namespace __refstring_imp;
+
+inline
+__libcpp_refstring::__libcpp_refstring(const char* msg) {
+ std::size_t len = strlen(msg);
+ _Rep_base* rep = static_cast<_Rep_base *>(::operator new(sizeof(*rep) + len + 1));
+ rep->len = len;
+ rep->cap = len;
+ rep->count = 0;
+ char *data = data_from_rep(rep);
+ std::memcpy(data, msg, len + 1);
+ __imp_ = data;
+}
+
+inline
+__libcpp_refstring::__libcpp_refstring(const __libcpp_refstring &s) _NOEXCEPT
+ : __imp_(s.__imp_)
+{
+ if (__uses_refcount())
+ __libcpp_atomic_add(&rep_from_data(__imp_)->count, 1);
+}
+
+inline
+__libcpp_refstring& __libcpp_refstring::operator=(__libcpp_refstring const& s) _NOEXCEPT {
+ bool adjust_old_count = __uses_refcount();
+ struct _Rep_base *old_rep = rep_from_data(__imp_);
+ __imp_ = s.__imp_;
+ if (__uses_refcount())
+ __libcpp_atomic_add(&rep_from_data(__imp_)->count, 1);
+ if (adjust_old_count)
+ {
+ if (__libcpp_atomic_add(&old_rep->count, count_t(-1)) < 0)
+ {
+ ::operator delete(old_rep);
+ }
+ }
+ return *this;
+}
+
+inline
+__libcpp_refstring::~__libcpp_refstring() {
+ if (__uses_refcount()) {
+ _Rep_base* rep = rep_from_data(__imp_);
+ if (__libcpp_atomic_add(&rep->count, count_t(-1)) < 0) {
+ ::operator delete(rep);
+ }
+ }
+}
+
+inline
+bool __libcpp_refstring::__uses_refcount() const {
+#ifdef __APPLE__
+ return __imp_ != get_gcc_empty_string_storage();
+#else
+ return true;
+#endif
+}
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif //_LIBCPPABI_REFSTRING_H
Index: contrib/libcxxabi/src/private_typeinfo.h
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/private_typeinfo.h
@@ -0,0 +1,251 @@
+//===------------------------ private_typeinfo.h --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __PRIVATE_TYPEINFO_H_
+#define __PRIVATE_TYPEINFO_H_
+
+#include "__cxxabi_config.h"
+
+#include <typeinfo>
+#include <cstddef>
+
+namespace __cxxabiv1 {
+
+class _LIBCXXABI_TYPE_VIS __shim_type_info : public std::type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__shim_type_info();
+
+ _LIBCXXABI_HIDDEN virtual void noop1() const;
+ _LIBCXXABI_HIDDEN virtual void noop2() const;
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *thrown_type,
+ void *&adjustedPtr) const = 0;
+};
+
+class _LIBCXXABI_TYPE_VIS __fundamental_type_info : public __shim_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__fundamental_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __array_type_info : public __shim_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__array_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __function_type_info : public __shim_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__function_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __enum_type_info : public __shim_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__enum_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+};
+
+enum
+{
+ unknown = 0,
+ public_path,
+ not_public_path,
+ yes,
+ no
+};
+
+class _LIBCXXABI_TYPE_VIS __class_type_info;
+
+struct _LIBCXXABI_HIDDEN __dynamic_cast_info
+{
+// const data supplied to the search:
+
+ const __class_type_info* dst_type;
+ const void* static_ptr;
+ const __class_type_info* static_type;
+ std::ptrdiff_t src2dst_offset;
+
+// Data that represents the answer:
+
+ // pointer to a dst_type which has (static_ptr, static_type) above it
+ const void* dst_ptr_leading_to_static_ptr;
+ // pointer to a dst_type which does not have (static_ptr, static_type) above it
+ const void* dst_ptr_not_leading_to_static_ptr;
+
+ // The following three paths are either unknown, public_path or not_public_path.
+ // access of path from dst_ptr_leading_to_static_ptr to (static_ptr, static_type)
+ int path_dst_ptr_to_static_ptr;
+ // access of path from (dynamic_ptr, dynamic_type) to (static_ptr, static_type)
+ // when there is no dst_type along the path
+ int path_dynamic_ptr_to_static_ptr;
+ // access of path from (dynamic_ptr, dynamic_type) to dst_type
+ // (not used if there is a (static_ptr, static_type) above a dst_type).
+ int path_dynamic_ptr_to_dst_ptr;
+
+ // Number of dst_types below (static_ptr, static_type)
+ int number_to_static_ptr;
+ // Number of dst_types not below (static_ptr, static_type)
+ int number_to_dst_ptr;
+
+// Data that helps stop the search before the entire tree is searched:
+
+ // is_dst_type_derived_from_static_type is either unknown, yes or no.
+ int is_dst_type_derived_from_static_type;
+ // Number of dst_type in tree. If 0, then that means unknown.
+ int number_of_dst_type;
+ // communicates to a dst_type node that (static_ptr, static_type) was found
+ // above it.
+ bool found_our_static_ptr;
+ // communicates to a dst_type node that a static_type was found
+ // above it, but it wasn't (static_ptr, static_type)
+ bool found_any_static_type;
+ // Set whenever a search can be stopped
+ bool search_done;
+};
+
+// Has no base class
+class _LIBCXXABI_TYPE_VIS __class_type_info : public __shim_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__class_type_info();
+
+ _LIBCXXABI_HIDDEN void process_static_type_above_dst(__dynamic_cast_info *,
+ const void *,
+ const void *, int) const;
+ _LIBCXXABI_HIDDEN void process_static_type_below_dst(__dynamic_cast_info *,
+ const void *, int) const;
+ _LIBCXXABI_HIDDEN void process_found_base_class(__dynamic_cast_info *, void *,
+ int) const;
+ _LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
+ const void *, const void *,
+ int, bool) const;
+ _LIBCXXABI_HIDDEN virtual void
+ search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+ _LIBCXXABI_HIDDEN virtual void
+ has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
+};
+
+// Has one non-virtual public base class at offset zero
+class _LIBCXXABI_TYPE_VIS __si_class_type_info : public __class_type_info {
+public:
+ const __class_type_info *__base_type;
+
+ _LIBCXXABI_HIDDEN virtual ~__si_class_type_info();
+
+ _LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
+ const void *, const void *,
+ int, bool) const;
+ _LIBCXXABI_HIDDEN virtual void
+ search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
+ _LIBCXXABI_HIDDEN virtual void
+ has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
+};
+
+struct _LIBCXXABI_HIDDEN __base_class_type_info
+{
+public:
+ const __class_type_info* __base_type;
+ long __offset_flags;
+
+ enum __offset_flags_masks
+ {
+ __virtual_mask = 0x1,
+ __public_mask = 0x2, // base is public
+ __offset_shift = 8
+ };
+
+ void search_above_dst(__dynamic_cast_info*, const void*, const void*, int, bool) const;
+ void search_below_dst(__dynamic_cast_info*, const void*, int, bool) const;
+ void has_unambiguous_public_base(__dynamic_cast_info*, void*, int) const;
+};
+
+// Has one or more base classes
+class _LIBCXXABI_TYPE_VIS __vmi_class_type_info : public __class_type_info {
+public:
+ unsigned int __flags;
+ unsigned int __base_count;
+ __base_class_type_info __base_info[1];
+
+ enum __flags_masks {
+ __non_diamond_repeat_mask = 0x1, // has two or more distinct base class
+ // objects of the same type
+ __diamond_shaped_mask = 0x2 // has base class object with two or
+ // more derived objects
+ };
+
+ _LIBCXXABI_HIDDEN virtual ~__vmi_class_type_info();
+
+ _LIBCXXABI_HIDDEN virtual void search_above_dst(__dynamic_cast_info *,
+ const void *, const void *,
+ int, bool) const;
+ _LIBCXXABI_HIDDEN virtual void
+ search_below_dst(__dynamic_cast_info *, const void *, int, bool) const;
+ _LIBCXXABI_HIDDEN virtual void
+ has_unambiguous_public_base(__dynamic_cast_info *, void *, int) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __pbase_type_info : public __shim_type_info {
+public:
+ unsigned int __flags;
+ const __shim_type_info *__pointee;
+
+ enum __masks {
+ __const_mask = 0x1,
+ __volatile_mask = 0x2,
+ __restrict_mask = 0x4,
+ __incomplete_mask = 0x8,
+ __incomplete_class_mask = 0x10,
+ __transaction_safe_mask = 0x20,
+ // This implements the following proposal from cxx-abi-dev (not yet part of
+ // the ABI document):
+ //
+ // http://sourcerytools.com/pipermail/cxx-abi-dev/2016-October/002986.html
+ //
+ // This is necessary for support of http://wg21.link/p0012, which permits
+ // throwing noexcept function and member function pointers and catching
+ // them as non-noexcept pointers.
+ __noexcept_mask = 0x40,
+
+ // Flags that cannot be removed by a standard conversion.
+ __no_remove_flags_mask = __const_mask | __volatile_mask | __restrict_mask,
+ // Flags that cannot be added by a standard conversion.
+ __no_add_flags_mask = __transaction_safe_mask | __noexcept_mask
+ };
+
+ _LIBCXXABI_HIDDEN virtual ~__pbase_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __pointer_type_info : public __pbase_type_info {
+public:
+ _LIBCXXABI_HIDDEN virtual ~__pointer_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+ _LIBCXXABI_HIDDEN bool can_catch_nested(const __shim_type_info *) const;
+};
+
+class _LIBCXXABI_TYPE_VIS __pointer_to_member_type_info
+ : public __pbase_type_info {
+public:
+ const __class_type_info *__context;
+
+ _LIBCXXABI_HIDDEN virtual ~__pointer_to_member_type_info();
+ _LIBCXXABI_HIDDEN virtual bool can_catch(const __shim_type_info *,
+ void *&) const;
+ _LIBCXXABI_HIDDEN bool can_catch_nested(const __shim_type_info *) const;
+};
+
+} // __cxxabiv1
+
+#endif // __PRIVATE_TYPEINFO_H_
Index: contrib/libcxxabi/src/private_typeinfo.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/private_typeinfo.cpp
@@ -0,0 +1,1300 @@
+//===----------------------- private_typeinfo.cpp -------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "private_typeinfo.h"
+
+// The flag _LIBCXX_DYNAMIC_FALLBACK is used to make dynamic_cast more
+// forgiving when type_info's mistakenly have hidden visibility and thus
+// multiple type_infos can exist for a single type.
+//
+// When _LIBCXX_DYNAMIC_FALLBACK is defined, and only in the case where
+// there is a detected inconsistency in the type_info hierarchy during a
+// dynamic_cast, then the equality operation will fall back to using strcmp
+// on type_info names to determine type_info equality.
+//
+// This change happens *only* under dynamic_cast, and only when
+// dynamic_cast is faced with the choice: abort, or possibly give back the
+// wrong answer. If when the dynamic_cast is done with this fallback
+// algorithm and an inconsistency is still detected, dynamic_cast will call
+// abort with an appropriate message.
+//
+// The current implementation of _LIBCXX_DYNAMIC_FALLBACK requires a
+// printf-like function called syslog:
+//
+// void syslog(int facility_priority, const char* format, ...);
+//
+// If you want this functionality but your platform doesn't have syslog,
+// just implement it in terms of fprintf(stderr, ...).
+//
+// _LIBCXX_DYNAMIC_FALLBACK is currently off by default.
+
+
+#include <string.h>
+
+
+#ifdef _LIBCXX_DYNAMIC_FALLBACK
+#include "abort_message.h"
+#include <sys/syslog.h>
+#endif
+
+// On Windows, typeids are different between DLLs and EXEs, so comparing
+// type_info* will work for typeids from the same compiled file but fail
+// for typeids from a DLL and an executable. Among other things, exceptions
+// are not caught by handlers since can_catch() returns false.
+//
+// Defining _LIBCXX_DYNAMIC_FALLBACK does not help since can_catch() calls
+// is_equal() with use_strcmp=false so the string names are not compared.
+
+#ifdef _WIN32
+#include <string.h>
+#endif
+
+static inline
+bool
+is_equal(const std::type_info* x, const std::type_info* y, bool use_strcmp)
+{
+#ifndef _WIN32
+ if (!use_strcmp)
+ return x == y;
+ return strcmp(x->name(), y->name()) == 0;
+#else
+ (void) use_strcmp;
+ return (x == y) || (strcmp(x->name(), y->name()) == 0);
+#endif
+}
+
+namespace __cxxabiv1
+{
+
+// __shim_type_info
+
+__shim_type_info::~__shim_type_info()
+{
+}
+
+void __shim_type_info::noop1() const {}
+void __shim_type_info::noop2() const {}
+
+// __fundamental_type_info
+
+// This miraculously (compiler magic) emits the type_info's for:
+// 1. all of the fundamental types
+// 2. pointers to all of the fundamental types
+// 3. pointers to all of the const fundamental types
+__fundamental_type_info::~__fundamental_type_info()
+{
+}
+
+// __array_type_info
+
+__array_type_info::~__array_type_info()
+{
+}
+
+// __function_type_info
+
+__function_type_info::~__function_type_info()
+{
+}
+
+// __enum_type_info
+
+__enum_type_info::~__enum_type_info()
+{
+}
+
+// __class_type_info
+
+__class_type_info::~__class_type_info()
+{
+}
+
+// __si_class_type_info
+
+__si_class_type_info::~__si_class_type_info()
+{
+}
+
+// __vmi_class_type_info
+
+__vmi_class_type_info::~__vmi_class_type_info()
+{
+}
+
+// __pbase_type_info
+
+__pbase_type_info::~__pbase_type_info()
+{
+}
+
+// __pointer_type_info
+
+__pointer_type_info::~__pointer_type_info()
+{
+}
+
+// __pointer_to_member_type_info
+
+__pointer_to_member_type_info::~__pointer_to_member_type_info()
+{
+}
+
+// can_catch
+
+// A handler is a match for an exception object of type E if
+// 1. The handler is of type cv T or cv T& and E and T are the same type
+// (ignoring the top-level cv-qualifiers), or
+// 2. the handler is of type cv T or cv T& and T is an unambiguous public
+// base class of E, or
+// 3. the handler is of type cv1 T* cv2 and E is a pointer type that can be
+// converted to the type of the handler by either or both of
+// A. a standard pointer conversion (4.10) not involving conversions to
+// pointers to private or protected or ambiguous classes
+// B. a qualification conversion
+// 4. the handler is a pointer or pointer to member type and E is
+// std::nullptr_t.
+
+// adjustedPtr:
+//
+// catch (A& a) : adjustedPtr == &a
+// catch (A* a) : adjustedPtr == a
+// catch (A** a) : adjustedPtr == a
+//
+// catch (D2& d2) : adjustedPtr == &d2 (d2 is base class of thrown object)
+// catch (D2* d2) : adjustedPtr == d2
+// catch (D2*& d2) : adjustedPtr == d2
+//
+// catch (...) : adjustedPtr == & of the exception
+//
+// If the thrown type is nullptr_t and the caught type is a pointer to
+// member type, adjustedPtr points to a statically-allocated null pointer
+// representation of that type.
+
+// Handles bullet 1
+bool
+__fundamental_type_info::can_catch(const __shim_type_info* thrown_type,
+ void*&) const
+{
+ return is_equal(this, thrown_type, false);
+}
+
+bool
+__array_type_info::can_catch(const __shim_type_info*, void*&) const
+{
+ // We can get here if someone tries to catch an array by reference.
+ // However if someone tries to throw an array, it immediately gets
+ // converted to a pointer, which will not convert back to an array
+ // at the catch clause. So this can never catch anything.
+ return false;
+}
+
+bool
+__function_type_info::can_catch(const __shim_type_info*, void*&) const
+{
+ // We can get here if someone tries to catch a function by reference.
+ // However if someone tries to throw a function, it immediately gets
+ // converted to a pointer, which will not convert back to a function
+ // at the catch clause. So this can never catch anything.
+ return false;
+}
+
+// Handles bullet 1
+bool
+__enum_type_info::can_catch(const __shim_type_info* thrown_type,
+ void*&) const
+{
+ return is_equal(this, thrown_type, false);
+}
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+// Handles bullets 1 and 2
+bool
+__class_type_info::can_catch(const __shim_type_info* thrown_type,
+ void*& adjustedPtr) const
+{
+ // bullet 1
+ if (is_equal(this, thrown_type, false))
+ return true;
+ const __class_type_info* thrown_class_type =
+ dynamic_cast<const __class_type_info*>(thrown_type);
+ if (thrown_class_type == 0)
+ return false;
+ // bullet 2
+ __dynamic_cast_info info = {thrown_class_type, 0, this, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,};
+ info.number_of_dst_type = 1;
+ thrown_class_type->has_unambiguous_public_base(&info, adjustedPtr, public_path);
+ if (info.path_dst_ptr_to_static_ptr == public_path)
+ {
+ adjustedPtr = const_cast<void*>(info.dst_ptr_leading_to_static_ptr);
+ return true;
+ }
+ return false;
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+void
+__class_type_info::process_found_base_class(__dynamic_cast_info* info,
+ void* adjustedPtr,
+ int path_below) const
+{
+ if (info->dst_ptr_leading_to_static_ptr == 0)
+ {
+ // First time here
+ info->dst_ptr_leading_to_static_ptr = adjustedPtr;
+ info->path_dst_ptr_to_static_ptr = path_below;
+ info->number_to_static_ptr = 1;
+ }
+ else if (info->dst_ptr_leading_to_static_ptr == adjustedPtr)
+ {
+ // We've been here before. Update path to "most public"
+ if (info->path_dst_ptr_to_static_ptr == not_public_path)
+ info->path_dst_ptr_to_static_ptr = path_below;
+ }
+ else
+ {
+ // We've detected an ambiguous cast from (thrown_class_type, adjustedPtr)
+ // to a static_type
+ info->number_to_static_ptr += 1;
+ info->path_dst_ptr_to_static_ptr = not_public_path;
+ info->search_done = true;
+ }
+}
+
+void
+__class_type_info::has_unambiguous_public_base(__dynamic_cast_info* info,
+ void* adjustedPtr,
+ int path_below) const
+{
+ if (is_equal(this, info->static_type, false))
+ process_found_base_class(info, adjustedPtr, path_below);
+}
+
+void
+__si_class_type_info::has_unambiguous_public_base(__dynamic_cast_info* info,
+ void* adjustedPtr,
+ int path_below) const
+{
+ if (is_equal(this, info->static_type, false))
+ process_found_base_class(info, adjustedPtr, path_below);
+ else
+ __base_type->has_unambiguous_public_base(info, adjustedPtr, path_below);
+}
+
+void
+__base_class_type_info::has_unambiguous_public_base(__dynamic_cast_info* info,
+ void* adjustedPtr,
+ int path_below) const
+{
+ ptrdiff_t offset_to_base = 0;
+ if (adjustedPtr != nullptr)
+ {
+ offset_to_base = __offset_flags >> __offset_shift;
+ if (__offset_flags & __virtual_mask)
+ {
+ const char* vtable = *static_cast<const char*const*>(adjustedPtr);
+ offset_to_base = *reinterpret_cast<const ptrdiff_t*>(vtable + offset_to_base);
+ }
+ }
+ __base_type->has_unambiguous_public_base(
+ info,
+ static_cast<char*>(adjustedPtr) + offset_to_base,
+ (__offset_flags & __public_mask) ? path_below : not_public_path);
+}
+
+void
+__vmi_class_type_info::has_unambiguous_public_base(__dynamic_cast_info* info,
+ void* adjustedPtr,
+ int path_below) const
+{
+ if (is_equal(this, info->static_type, false))
+ process_found_base_class(info, adjustedPtr, path_below);
+ else
+ {
+ typedef const __base_class_type_info* Iter;
+ const Iter e = __base_info + __base_count;
+ Iter p = __base_info;
+ p->has_unambiguous_public_base(info, adjustedPtr, path_below);
+ if (++p < e)
+ {
+ do
+ {
+ p->has_unambiguous_public_base(info, adjustedPtr, path_below);
+ if (info->search_done)
+ break;
+ } while (++p < e);
+ }
+ }
+}
+
+// Handles bullet 1 for both pointers and member pointers
+bool
+__pbase_type_info::can_catch(const __shim_type_info* thrown_type,
+ void*&) const
+{
+ bool use_strcmp = this->__flags & (__incomplete_class_mask |
+ __incomplete_mask);
+ if (!use_strcmp) {
+ const __pbase_type_info* thrown_pbase = dynamic_cast<const __pbase_type_info*>(
+ thrown_type);
+ if (!thrown_pbase) return false;
+ use_strcmp = thrown_pbase->__flags & (__incomplete_class_mask |
+ __incomplete_mask);
+ }
+ return is_equal(this, thrown_type, use_strcmp);
+}
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+// Handles bullets 1, 3 and 4
+// NOTE: It might not be safe to adjust the pointer if it is not not a pointer
+// type. Only adjust the pointer after we know it is safe to do so.
+bool
+__pointer_type_info::can_catch(const __shim_type_info* thrown_type,
+ void*& adjustedPtr) const
+{
+ // bullet 4
+ if (is_equal(thrown_type, &typeid(std::nullptr_t), false)) {
+ adjustedPtr = nullptr;
+ return true;
+ }
+
+ // bullet 1
+ if (__pbase_type_info::can_catch(thrown_type, adjustedPtr)) {
+ if (adjustedPtr != NULL)
+ adjustedPtr = *static_cast<void**>(adjustedPtr);
+ return true;
+ }
+ // bullet 3
+ const __pointer_type_info* thrown_pointer_type =
+ dynamic_cast<const __pointer_type_info*>(thrown_type);
+ if (thrown_pointer_type == 0)
+ return false;
+ // Do the dereference adjustment
+ if (adjustedPtr != NULL)
+ adjustedPtr = *static_cast<void**>(adjustedPtr);
+ // bullet 3B and 3C
+ if (thrown_pointer_type->__flags & ~__flags & __no_remove_flags_mask)
+ return false;
+ if (__flags & ~thrown_pointer_type->__flags & __no_add_flags_mask)
+ return false;
+ if (is_equal(__pointee, thrown_pointer_type->__pointee, false))
+ return true;
+ // bullet 3A
+ if (is_equal(__pointee, &typeid(void), false)) {
+ // pointers to functions cannot be converted to void*.
+ // pointers to member functions are not handled here.
+ const __function_type_info* thrown_function =
+ dynamic_cast<const __function_type_info*>(thrown_pointer_type->__pointee);
+ return (thrown_function == nullptr);
+ }
+ // Handle pointer to pointer
+ const __pointer_type_info* nested_pointer_type =
+ dynamic_cast<const __pointer_type_info*>(__pointee);
+ if (nested_pointer_type) {
+ if (~__flags & __const_mask) return false;
+ return nested_pointer_type->can_catch_nested(thrown_pointer_type->__pointee);
+ }
+
+ // Handle pointer to pointer to member
+ const __pointer_to_member_type_info* member_ptr_type =
+ dynamic_cast<const __pointer_to_member_type_info*>(__pointee);
+ if (member_ptr_type) {
+ if (~__flags & __const_mask) return false;
+ return member_ptr_type->can_catch_nested(thrown_pointer_type->__pointee);
+ }
+
+ // Handle pointer to class type
+ const __class_type_info* catch_class_type =
+ dynamic_cast<const __class_type_info*>(__pointee);
+ if (catch_class_type == 0)
+ return false;
+ const __class_type_info* thrown_class_type =
+ dynamic_cast<const __class_type_info*>(thrown_pointer_type->__pointee);
+ if (thrown_class_type == 0)
+ return false;
+ __dynamic_cast_info info = {thrown_class_type, 0, catch_class_type, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,};
+ info.number_of_dst_type = 1;
+ thrown_class_type->has_unambiguous_public_base(&info, adjustedPtr, public_path);
+ if (info.path_dst_ptr_to_static_ptr == public_path)
+ {
+ if (adjustedPtr != NULL)
+ adjustedPtr = const_cast<void*>(info.dst_ptr_leading_to_static_ptr);
+ return true;
+ }
+ return false;
+}
+
+bool __pointer_type_info::can_catch_nested(
+ const __shim_type_info* thrown_type) const
+{
+ const __pointer_type_info* thrown_pointer_type =
+ dynamic_cast<const __pointer_type_info*>(thrown_type);
+ if (thrown_pointer_type == 0)
+ return false;
+ // bullet 3B
+ if (thrown_pointer_type->__flags & ~__flags)
+ return false;
+ if (is_equal(__pointee, thrown_pointer_type->__pointee, false))
+ return true;
+ // If the pointed to types differ then the catch type must be const
+ // qualified.
+ if (~__flags & __const_mask)
+ return false;
+
+ // Handle pointer to pointer
+ const __pointer_type_info* nested_pointer_type =
+ dynamic_cast<const __pointer_type_info*>(__pointee);
+ if (nested_pointer_type) {
+ return nested_pointer_type->can_catch_nested(
+ thrown_pointer_type->__pointee);
+ }
+
+ // Handle pointer to pointer to member
+ const __pointer_to_member_type_info* member_ptr_type =
+ dynamic_cast<const __pointer_to_member_type_info*>(__pointee);
+ if (member_ptr_type) {
+ return member_ptr_type->can_catch_nested(thrown_pointer_type->__pointee);
+ }
+
+ return false;
+}
+
+bool __pointer_to_member_type_info::can_catch(
+ const __shim_type_info* thrown_type, void*& adjustedPtr) const {
+ // bullet 4
+ if (is_equal(thrown_type, &typeid(std::nullptr_t), false)) {
+ // We assume that the pointer to member representation is the same for
+ // all pointers to data members and for all pointers to member functions.
+ struct X {};
+ if (dynamic_cast<const __function_type_info*>(__pointee)) {
+ static int (X::*const null_ptr_rep)() = nullptr;
+ adjustedPtr = const_cast<int (X::**)()>(&null_ptr_rep);
+ } else {
+ static int X::*const null_ptr_rep = nullptr;
+ adjustedPtr = const_cast<int X::**>(&null_ptr_rep);
+ }
+ return true;
+ }
+
+ // bullet 1
+ if (__pbase_type_info::can_catch(thrown_type, adjustedPtr))
+ return true;
+
+ const __pointer_to_member_type_info* thrown_pointer_type =
+ dynamic_cast<const __pointer_to_member_type_info*>(thrown_type);
+ if (thrown_pointer_type == 0)
+ return false;
+ if (thrown_pointer_type->__flags & ~__flags & __no_remove_flags_mask)
+ return false;
+ if (__flags & ~thrown_pointer_type->__flags & __no_add_flags_mask)
+ return false;
+ if (!is_equal(__pointee, thrown_pointer_type->__pointee, false))
+ return false;
+ if (is_equal(__context, thrown_pointer_type->__context, false))
+ return true;
+
+ // [except.handle] does not allow the pointer-to-member conversions mentioned
+ // in [mem.conv] to take place. For this reason we don't check Derived->Base
+ // for Derived->Base conversions.
+
+ return false;
+}
+
+bool __pointer_to_member_type_info::can_catch_nested(
+ const __shim_type_info* thrown_type) const
+{
+ const __pointer_to_member_type_info* thrown_member_ptr_type =
+ dynamic_cast<const __pointer_to_member_type_info*>(thrown_type);
+ if (thrown_member_ptr_type == 0)
+ return false;
+ if (~__flags & thrown_member_ptr_type->__flags)
+ return false;
+ if (!is_equal(__pointee, thrown_member_ptr_type->__pointee, false))
+ return false;
+ if (!is_equal(__context, thrown_member_ptr_type->__context, false))
+ return false;
+ return true;
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+// __dynamic_cast
+
+// static_ptr: pointer to an object of type static_type; nonnull, and since the
+// object is polymorphic, *(void**)static_ptr is a virtual table pointer.
+// static_ptr is &v in the expression dynamic_cast<T>(v).
+// static_type: static type of the object pointed to by static_ptr.
+// dst_type: destination type of the cast (the "T" in "dynamic_cast<T>(v)").
+// src2dst_offset: a static hint about the location of the
+// source subobject with respect to the complete object;
+// special negative values are:
+// -1: no hint
+// -2: static_type is not a public base of dst_type
+// -3: static_type is a multiple public base type but never a
+// virtual base type
+// otherwise, the static_type type is a unique public nonvirtual
+// base type of dst_type at offset src2dst_offset from the
+// origin of dst_type.
+//
+// (dynamic_ptr, dynamic_type) are the run time type of the complete object
+// referred to by static_ptr and a pointer to it. These can be found from
+// static_ptr for polymorphic types.
+// static_type is guaranteed to be a polymorphic type.
+//
+// (dynamic_ptr, dynamic_type) is the root of a DAG that grows upward. Each
+// node of the tree represents a base class/object of its parent (or parents) below.
+// Each node is uniquely represented by a pointer to the object, and a pointer
+// to a type_info - its type. Different nodes may have the same pointer and
+// different nodes may have the same type. But only one node has a specific
+// (pointer-value, type) pair. In C++ two objects of the same type can not
+// share the same address.
+//
+// There are two flavors of nodes which have the type dst_type:
+// 1. Those that are derived from (below) (static_ptr, static_type).
+// 2. Those that are not derived from (below) (static_ptr, static_type).
+//
+// Invariants of the DAG:
+//
+// There is at least one path from the root (dynamic_ptr, dynamic_type) to
+// the node (static_ptr, static_type). This path may or may not be public.
+// There may be more than one such path (some public some not). Such a path may
+// or may not go through a node having type dst_type.
+//
+// No node of type T appears above a node of the same type. That means that
+// there is only one node with dynamic_type. And if dynamic_type == dst_type,
+// then there is only one dst_type in the DAG.
+//
+// No node of type dst_type appears above a node of type static_type. Such
+// DAG's are possible in C++, but the compiler computes those dynamic_casts at
+// compile time, and only calls __dynamic_cast when dst_type lies below
+// static_type in the DAG.
+//
+// dst_type != static_type: The compiler computes the dynamic_cast in this case too.
+// dynamic_type != static_type: The compiler computes the dynamic_cast in this case too.
+//
+// Returns:
+//
+// If there is exactly one dst_type of flavor 1, and
+// If there is a public path from that dst_type to (static_ptr, static_type), or
+// If there are 0 dst_types of flavor 2, and there is a public path from
+// (dynamic_ptr, dynamic_type) to (static_ptr, static_type) and a public
+// path from (dynamic_ptr, dynamic_type) to the one dst_type, then return
+// a pointer to that dst_type.
+// Else if there are 0 dst_types of flavor 1 and exactly 1 dst_type of flavor 2, and
+// if there is a public path from (dynamic_ptr, dynamic_type) to
+// (static_ptr, static_type) and a public path from (dynamic_ptr, dynamic_type)
+// to the one dst_type, then return a pointer to that one dst_type.
+// Else return nullptr.
+//
+// If dynamic_type == dst_type, then the above algorithm collapses to the
+// following cheaper algorithm:
+//
+// If there is a public path from (dynamic_ptr, dynamic_type) to
+// (static_ptr, static_type), then return dynamic_ptr.
+// Else return nullptr.
+
+extern "C" _LIBCXXABI_FUNC_VIS void *
+__dynamic_cast(const void *static_ptr, const __class_type_info *static_type,
+ const __class_type_info *dst_type,
+ std::ptrdiff_t src2dst_offset) {
+ // Possible future optimization: Take advantage of src2dst_offset
+ // Currently clang always sets src2dst_offset to -1 (no hint).
+
+ // Get (dynamic_ptr, dynamic_type) from static_ptr
+ void **vtable = *static_cast<void ** const *>(static_ptr);
+ ptrdiff_t offset_to_derived = reinterpret_cast<ptrdiff_t>(vtable[-2]);
+ const void* dynamic_ptr = static_cast<const char*>(static_ptr) + offset_to_derived;
+ const __class_type_info* dynamic_type = static_cast<const __class_type_info*>(vtable[-1]);
+
+ // Initialize answer to nullptr. This will be changed from the search
+ // results if a non-null answer is found. Regardless, this is what will
+ // be returned.
+ const void* dst_ptr = 0;
+ // Initialize info struct for this search.
+ __dynamic_cast_info info = {dst_type, static_ptr, static_type, src2dst_offset, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,};
+
+ // Find out if we can use a giant short cut in the search
+ if (is_equal(dynamic_type, dst_type, false))
+ {
+ // Using giant short cut. Add that information to info.
+ info.number_of_dst_type = 1;
+ // Do the search
+ dynamic_type->search_above_dst(&info, dynamic_ptr, dynamic_ptr, public_path, false);
+#ifdef _LIBCXX_DYNAMIC_FALLBACK
+ // The following if should always be false because we should definitely
+ // find (static_ptr, static_type), either on a public or private path
+ if (info.path_dst_ptr_to_static_ptr == unknown)
+ {
+ // We get here only if there is some kind of visibility problem
+ // in client code.
+ syslog(LOG_ERR, "dynamic_cast error 1: Both of the following type_info's "
+ "should have public visibility. At least one of them is hidden. %s"
+ ", %s.\n", static_type->name(), dynamic_type->name());
+ // Redo the search comparing type_info's using strcmp
+ info = {dst_type, static_ptr, static_type, src2dst_offset, 0};
+ info.number_of_dst_type = 1;
+ dynamic_type->search_above_dst(&info, dynamic_ptr, dynamic_ptr, public_path, true);
+ }
+#endif // _LIBCXX_DYNAMIC_FALLBACK
+ // Query the search.
+ if (info.path_dst_ptr_to_static_ptr == public_path)
+ dst_ptr = dynamic_ptr;
+ }
+ else
+ {
+ // Not using giant short cut. Do the search
+ dynamic_type->search_below_dst(&info, dynamic_ptr, public_path, false);
+ #ifdef _LIBCXX_DYNAMIC_FALLBACK
+ // The following if should always be false because we should definitely
+ // find (static_ptr, static_type), either on a public or private path
+ if (info.path_dst_ptr_to_static_ptr == unknown &&
+ info.path_dynamic_ptr_to_static_ptr == unknown)
+ {
+ syslog(LOG_ERR, "dynamic_cast error 2: One or more of the following type_info's "
+ "has hidden visibility or is defined in more than one translation "
+ "unit. They should all have public visibility. "
+ "%s, %s, %s.\n", static_type->name(), dynamic_type->name(),
+ dst_type->name());
+ // Redo the search comparing type_info's using strcmp
+ info = {dst_type, static_ptr, static_type, src2dst_offset, 0};
+ dynamic_type->search_below_dst(&info, dynamic_ptr, public_path, true);
+ }
+#endif // _LIBCXX_DYNAMIC_FALLBACK
+ // Query the search.
+ switch (info.number_to_static_ptr)
+ {
+ case 0:
+ if (info.number_to_dst_ptr == 1 &&
+ info.path_dynamic_ptr_to_static_ptr == public_path &&
+ info.path_dynamic_ptr_to_dst_ptr == public_path)
+ dst_ptr = info.dst_ptr_not_leading_to_static_ptr;
+ break;
+ case 1:
+ if (info.path_dst_ptr_to_static_ptr == public_path ||
+ (
+ info.number_to_dst_ptr == 0 &&
+ info.path_dynamic_ptr_to_static_ptr == public_path &&
+ info.path_dynamic_ptr_to_dst_ptr == public_path
+ )
+ )
+ dst_ptr = info.dst_ptr_leading_to_static_ptr;
+ break;
+ }
+ }
+ return const_cast<void*>(dst_ptr);
+}
+
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
+
+// Call this function when you hit a static_type which is a base (above) a dst_type.
+// Let caller know you hit a static_type. But only start recording details if
+// this is (static_ptr, static_type) -- the node we are casting from.
+// If this is (static_ptr, static_type)
+// Record the path (public or not) from the dst_type to here. There may be
+// multiple paths from the same dst_type to here, record the "most public" one.
+// Record the dst_ptr as pointing to (static_ptr, static_type).
+// If more than one (dst_ptr, dst_type) points to (static_ptr, static_type),
+// then mark this dyanmic_cast as ambiguous and stop the search.
+void
+__class_type_info::process_static_type_above_dst(__dynamic_cast_info* info,
+ const void* dst_ptr,
+ const void* current_ptr,
+ int path_below) const
+{
+ // Record that we found a static_type
+ info->found_any_static_type = true;
+ if (current_ptr == info->static_ptr)
+ {
+ // Record that we found (static_ptr, static_type)
+ info->found_our_static_ptr = true;
+ if (info->dst_ptr_leading_to_static_ptr == 0)
+ {
+ // First time here
+ info->dst_ptr_leading_to_static_ptr = dst_ptr;
+ info->path_dst_ptr_to_static_ptr = path_below;
+ info->number_to_static_ptr = 1;
+ // If there is only one dst_type in the entire tree and the path from
+ // there to here is public then we are done!
+ if (info->number_of_dst_type == 1 && info->path_dst_ptr_to_static_ptr == public_path)
+ info->search_done = true;
+ }
+ else if (info->dst_ptr_leading_to_static_ptr == dst_ptr)
+ {
+ // We've been here before. Update path to "most public"
+ if (info->path_dst_ptr_to_static_ptr == not_public_path)
+ info->path_dst_ptr_to_static_ptr = path_below;
+ // If there is only one dst_type in the entire tree and the path from
+ // there to here is public then we are done!
+ if (info->number_of_dst_type == 1 && info->path_dst_ptr_to_static_ptr == public_path)
+ info->search_done = true;
+ }
+ else
+ {
+ // We've detected an ambiguous cast from (static_ptr, static_type)
+ // to a dst_type
+ info->number_to_static_ptr += 1;
+ info->search_done = true;
+ }
+ }
+}
+
+// Call this function when you hit a static_type which is not a base (above) a dst_type.
+// If this is (static_ptr, static_type)
+// Record the path (public or not) from (dynamic_ptr, dynamic_type) to here. There may be
+// multiple paths from (dynamic_ptr, dynamic_type) to here, record the "most public" one.
+void
+__class_type_info::process_static_type_below_dst(__dynamic_cast_info* info,
+ const void* current_ptr,
+ int path_below) const
+{
+ if (current_ptr == info->static_ptr)
+ {
+ // Record the most public path from (dynamic_ptr, dynamic_type) to
+ // (static_ptr, static_type)
+ if (info->path_dynamic_ptr_to_static_ptr != public_path)
+ info->path_dynamic_ptr_to_static_ptr = path_below;
+ }
+}
+
+// Call this function when searching below a dst_type node. This function searches
+// for a path to (static_ptr, static_type) and for paths to one or more dst_type nodes.
+// If it finds a static_type node, there is no need to further search base classes
+// above.
+// If it finds a dst_type node it should search base classes using search_above_dst
+// to find out if this dst_type points to (static_ptr, static_type) or not.
+// Either way, the dst_type is recorded as one of two "flavors": one that does
+// or does not point to (static_ptr, static_type).
+// If this is neither a static_type nor a dst_type node, continue searching
+// base classes above.
+// All the hoopla surrounding the search code is doing nothing but looking for
+// excuses to stop the search prematurely (break out of the for-loop). That is,
+// the algorithm below is simply an optimization of this:
+// void
+// __vmi_class_type_info::search_below_dst(__dynamic_cast_info* info,
+// const void* current_ptr,
+// int path_below) const
+// {
+// typedef const __base_class_type_info* Iter;
+// if (this == info->static_type)
+// process_static_type_below_dst(info, current_ptr, path_below);
+// else if (this == info->dst_type)
+// {
+// // Record the most public access path that got us here
+// if (info->path_dynamic_ptr_to_dst_ptr != public_path)
+// info->path_dynamic_ptr_to_dst_ptr = path_below;
+// bool does_dst_type_point_to_our_static_type = false;
+// for (Iter p = __base_info, e= __base_info + __base_count; p < e; ++p)
+// {
+// p->search_above_dst(info, current_ptr, current_ptr, public_path);
+// if (info->found_our_static_ptr)
+// does_dst_type_point_to_our_static_type = true;
+// // break out early here if you can detect it doesn't matter if you do
+// }
+// if (!does_dst_type_point_to_our_static_type)
+// {
+// // We found a dst_type that doesn't point to (static_ptr, static_type)
+// // So record the address of this dst_ptr and increment the
+// // count of the number of such dst_types found in the tree.
+// info->dst_ptr_not_leading_to_static_ptr = current_ptr;
+// info->number_to_dst_ptr += 1;
+// }
+// }
+// else
+// {
+// // This is not a static_type and not a dst_type.
+// for (Iter p = __base_info, e = __base_info + __base_count; p < e; ++p)
+// {
+// p->search_below_dst(info, current_ptr, public_path);
+// // break out early here if you can detect it doesn't matter if you do
+// }
+// }
+// }
+void
+__vmi_class_type_info::search_below_dst(__dynamic_cast_info* info,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ typedef const __base_class_type_info* Iter;
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_below_dst(info, current_ptr, path_below);
+ else if (is_equal(this, info->dst_type, use_strcmp))
+ {
+ // We've been here before if we've recorded current_ptr in one of these
+ // two places:
+ if (current_ptr == info->dst_ptr_leading_to_static_ptr ||
+ current_ptr == info->dst_ptr_not_leading_to_static_ptr)
+ {
+ // We've seen this node before, and therefore have already searched
+ // its base classes above.
+ // Update path to here that is "most public".
+ if (path_below == public_path)
+ info->path_dynamic_ptr_to_dst_ptr = public_path;
+ }
+ else // We have haven't been here before
+ {
+ // Record the access path that got us here
+ // If there is more than one dst_type this path doesn't matter.
+ info->path_dynamic_ptr_to_dst_ptr = path_below;
+ bool does_dst_type_point_to_our_static_type = false;
+ // Only search above here if dst_type derives from static_type, or
+ // if it is unknown if dst_type derives from static_type.
+ if (info->is_dst_type_derived_from_static_type != no)
+ {
+ // Set up flags to record results from all base classes
+ bool is_dst_type_derived_from_static_type = false;
+
+ // We've found a dst_type with a potentially public path to here.
+ // We have to assume the path is public because it may become
+ // public later (if we get back to here with a public path).
+ // We can stop looking above if:
+ // 1. We've found a public path to (static_ptr, static_type).
+ // 2. We've found an ambiguous cast from (static_ptr, static_type) to a dst_type.
+ // This is detected at the (static_ptr, static_type).
+ // 3. We can prove that there is no public path to (static_ptr, static_type)
+ // above here.
+ const Iter e = __base_info + __base_count;
+ for (Iter p = __base_info; p < e; ++p)
+ {
+ // Zero out found flags
+ info->found_our_static_ptr = false;
+ info->found_any_static_type = false;
+ p->search_above_dst(info, current_ptr, current_ptr, public_path, use_strcmp);
+ if (info->search_done)
+ break;
+ if (info->found_any_static_type)
+ {
+ is_dst_type_derived_from_static_type = true;
+ if (info->found_our_static_ptr)
+ {
+ does_dst_type_point_to_our_static_type = true;
+ // If we found what we're looking for, stop looking above.
+ if (info->path_dst_ptr_to_static_ptr == public_path)
+ break;
+ // We found a private path to (static_ptr, static_type)
+ // If there is no diamond then there is only one path
+ // to (static_ptr, static_type) and we just found it.
+ if (!(__flags & __diamond_shaped_mask))
+ break;
+ }
+ else
+ {
+ // If we found a static_type that isn't the one we're looking
+ // for, and if there are no repeated types above here,
+ // then stop looking.
+ if (!(__flags & __non_diamond_repeat_mask))
+ break;
+ }
+ }
+ }
+ // If we found no static_type,s then dst_type doesn't derive
+ // from static_type, else it does. Record this result so that
+ // next time we hit a dst_type we will know not to search above
+ // it if it doesn't derive from static_type.
+ if (is_dst_type_derived_from_static_type)
+ info->is_dst_type_derived_from_static_type = yes;
+ else
+ info->is_dst_type_derived_from_static_type = no;
+ }
+ if (!does_dst_type_point_to_our_static_type)
+ {
+ // We found a dst_type that doesn't point to (static_ptr, static_type)
+ // So record the address of this dst_ptr and increment the
+ // count of the number of such dst_types found in the tree.
+ info->dst_ptr_not_leading_to_static_ptr = current_ptr;
+ info->number_to_dst_ptr += 1;
+ // If there exists another dst with a private path to
+ // (static_ptr, static_type), then the cast from
+ // (dynamic_ptr, dynamic_type) to dst_type is now ambiguous,
+ // so stop search.
+ if (info->number_to_static_ptr == 1 &&
+ info->path_dst_ptr_to_static_ptr == not_public_path)
+ info->search_done = true;
+ }
+ }
+ }
+ else
+ {
+ // This is not a static_type and not a dst_type.
+ const Iter e = __base_info + __base_count;
+ Iter p = __base_info;
+ p->search_below_dst(info, current_ptr, path_below, use_strcmp);
+ if (++p < e)
+ {
+ if ((__flags & __diamond_shaped_mask) || info->number_to_static_ptr == 1)
+ {
+ // If there are multiple paths to a base above from here, or if
+ // a dst_type pointing to (static_ptr, static_type) has been found,
+ // then there is no way to break out of this loop early unless
+ // something below detects the search is done.
+ do
+ {
+ if (info->search_done)
+ break;
+ p->search_below_dst(info, current_ptr, path_below, use_strcmp);
+ } while (++p < e);
+ }
+ else if (__flags & __non_diamond_repeat_mask)
+ {
+ // There are not multiple paths to any base class from here and a
+ // dst_type pointing to (static_ptr, static_type) has not yet been
+ // found.
+ do
+ {
+ if (info->search_done)
+ break;
+ // If we just found a dst_type with a public path to (static_ptr, static_type),
+ // then the only reason to continue the search is to make sure
+ // no other dst_type points to (static_ptr, static_type).
+ // If !diamond, then we don't need to search here.
+ if (info->number_to_static_ptr == 1 &&
+ info->path_dst_ptr_to_static_ptr == public_path)
+ break;
+ p->search_below_dst(info, current_ptr, path_below, use_strcmp);
+ } while (++p < e);
+ }
+ else
+ {
+ // There are no repeated types above this node.
+ // There are no nodes with multiple parents above this node.
+ // no dst_type has been found to (static_ptr, static_type)
+ do
+ {
+ if (info->search_done)
+ break;
+ // If we just found a dst_type with a public path to (static_ptr, static_type),
+ // then the only reason to continue the search is to make sure sure
+ // no other dst_type points to (static_ptr, static_type).
+ // If !diamond, then we don't need to search here.
+ // if we just found a dst_type with a private path to (static_ptr, static_type),
+ // then we're only looking for a public path to (static_ptr, static_type)
+ // and to check for other dst_types.
+ // If !diamond & !repeat, then there is not a pointer to (static_ptr, static_type)
+ // and not a dst_type under here.
+ if (info->number_to_static_ptr == 1)
+ break;
+ p->search_below_dst(info, current_ptr, path_below, use_strcmp);
+ } while (++p < e);
+ }
+ }
+ }
+}
+
+// This is the same algorithm as __vmi_class_type_info::search_below_dst but
+// simplified to the case that there is only a single base class.
+void
+__si_class_type_info::search_below_dst(__dynamic_cast_info* info,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_below_dst(info, current_ptr, path_below);
+ else if (is_equal(this, info->dst_type, use_strcmp))
+ {
+ // We've been here before if we've recorded current_ptr in one of these
+ // two places:
+ if (current_ptr == info->dst_ptr_leading_to_static_ptr ||
+ current_ptr == info->dst_ptr_not_leading_to_static_ptr)
+ {
+ // We've seen this node before, and therefore have already searched
+ // its base classes above.
+ // Update path to here that is "most public".
+ if (path_below == public_path)
+ info->path_dynamic_ptr_to_dst_ptr = public_path;
+ }
+ else // We have haven't been here before
+ {
+ // Record the access path that got us here
+ // If there is more than one dst_type this path doesn't matter.
+ info->path_dynamic_ptr_to_dst_ptr = path_below;
+ bool does_dst_type_point_to_our_static_type = false;
+ // Only search above here if dst_type derives from static_type, or
+ // if it is unknown if dst_type derives from static_type.
+ if (info->is_dst_type_derived_from_static_type != no)
+ {
+ // Set up flags to record results from all base classes
+ bool is_dst_type_derived_from_static_type = false;
+ // Zero out found flags
+ info->found_our_static_ptr = false;
+ info->found_any_static_type = false;
+ __base_type->search_above_dst(info, current_ptr, current_ptr, public_path, use_strcmp);
+ if (info->found_any_static_type)
+ {
+ is_dst_type_derived_from_static_type = true;
+ if (info->found_our_static_ptr)
+ does_dst_type_point_to_our_static_type = true;
+ }
+ // If we found no static_type,s then dst_type doesn't derive
+ // from static_type, else it does. Record this result so that
+ // next time we hit a dst_type we will know not to search above
+ // it if it doesn't derive from static_type.
+ if (is_dst_type_derived_from_static_type)
+ info->is_dst_type_derived_from_static_type = yes;
+ else
+ info->is_dst_type_derived_from_static_type = no;
+ }
+ if (!does_dst_type_point_to_our_static_type)
+ {
+ // We found a dst_type that doesn't point to (static_ptr, static_type)
+ // So record the address of this dst_ptr and increment the
+ // count of the number of such dst_types found in the tree.
+ info->dst_ptr_not_leading_to_static_ptr = current_ptr;
+ info->number_to_dst_ptr += 1;
+ // If there exists another dst with a private path to
+ // (static_ptr, static_type), then the cast from
+ // (dynamic_ptr, dynamic_type) to dst_type is now ambiguous.
+ if (info->number_to_static_ptr == 1 &&
+ info->path_dst_ptr_to_static_ptr == not_public_path)
+ info->search_done = true;
+ }
+ }
+ }
+ else
+ {
+ // This is not a static_type and not a dst_type
+ __base_type->search_below_dst(info, current_ptr, path_below, use_strcmp);
+ }
+}
+
+// This is the same algorithm as __vmi_class_type_info::search_below_dst but
+// simplified to the case that there is no base class.
+void
+__class_type_info::search_below_dst(__dynamic_cast_info* info,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_below_dst(info, current_ptr, path_below);
+ else if (is_equal(this, info->dst_type, use_strcmp))
+ {
+ // We've been here before if we've recorded current_ptr in one of these
+ // two places:
+ if (current_ptr == info->dst_ptr_leading_to_static_ptr ||
+ current_ptr == info->dst_ptr_not_leading_to_static_ptr)
+ {
+ // We've seen this node before, and therefore have already searched
+ // its base classes above.
+ // Update path to here that is "most public".
+ if (path_below == public_path)
+ info->path_dynamic_ptr_to_dst_ptr = public_path;
+ }
+ else // We have haven't been here before
+ {
+ // Record the access path that got us here
+ // If there is more than one dst_type this path doesn't matter.
+ info->path_dynamic_ptr_to_dst_ptr = path_below;
+ // We found a dst_type that doesn't point to (static_ptr, static_type)
+ // So record the address of this dst_ptr and increment the
+ // count of the number of such dst_types found in the tree.
+ info->dst_ptr_not_leading_to_static_ptr = current_ptr;
+ info->number_to_dst_ptr += 1;
+ // If there exists another dst with a private path to
+ // (static_ptr, static_type), then the cast from
+ // (dynamic_ptr, dynamic_type) to dst_type is now ambiguous.
+ if (info->number_to_static_ptr == 1 &&
+ info->path_dst_ptr_to_static_ptr == not_public_path)
+ info->search_done = true;
+ // We found that dst_type does not derive from static_type
+ info->is_dst_type_derived_from_static_type = no;
+ }
+ }
+}
+
+// Call this function when searching above a dst_type node. This function searches
+// for a public path to (static_ptr, static_type).
+// This function is guaranteed not to find a node of type dst_type.
+// Theoretically this is a very simple function which just stops if it finds a
+// static_type node: All the hoopla surrounding the search code is doing
+// nothing but looking for excuses to stop the search prematurely (break out of
+// the for-loop). That is, the algorithm below is simply an optimization of this:
+// void
+// __vmi_class_type_info::search_above_dst(__dynamic_cast_info* info,
+// const void* dst_ptr,
+// const void* current_ptr,
+// int path_below) const
+// {
+// if (this == info->static_type)
+// process_static_type_above_dst(info, dst_ptr, current_ptr, path_below);
+// else
+// {
+// typedef const __base_class_type_info* Iter;
+// // This is not a static_type and not a dst_type
+// for (Iter p = __base_info, e = __base_info + __base_count; p < e; ++p)
+// {
+// p->search_above_dst(info, dst_ptr, current_ptr, public_path);
+// // break out early here if you can detect it doesn't matter if you do
+// }
+// }
+// }
+void
+__vmi_class_type_info::search_above_dst(__dynamic_cast_info* info,
+ const void* dst_ptr,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_above_dst(info, dst_ptr, current_ptr, path_below);
+ else
+ {
+ typedef const __base_class_type_info* Iter;
+ // This is not a static_type and not a dst_type
+ // Save flags so they can be restored when returning to nodes below.
+ bool found_our_static_ptr = info->found_our_static_ptr;
+ bool found_any_static_type = info->found_any_static_type;
+ // We've found a dst_type below with a path to here. If the path
+ // to here is not public, there may be another path to here that
+ // is public. So we have to assume that the path to here is public.
+ // We can stop looking above if:
+ // 1. We've found a public path to (static_ptr, static_type).
+ // 2. We've found an ambiguous cast from (static_ptr, static_type) to a dst_type.
+ // This is detected at the (static_ptr, static_type).
+ // 3. We can prove that there is no public path to (static_ptr, static_type)
+ // above here.
+ const Iter e = __base_info + __base_count;
+ Iter p = __base_info;
+ // Zero out found flags
+ info->found_our_static_ptr = false;
+ info->found_any_static_type = false;
+ p->search_above_dst(info, dst_ptr, current_ptr, path_below, use_strcmp);
+ found_our_static_ptr |= info->found_our_static_ptr;
+ found_any_static_type |= info->found_any_static_type;
+ if (++p < e)
+ {
+ do
+ {
+ if (info->search_done)
+ break;
+ if (info->found_our_static_ptr)
+ {
+ // If we found what we're looking for, stop looking above.
+ if (info->path_dst_ptr_to_static_ptr == public_path)
+ break;
+ // We found a private path to (static_ptr, static_type)
+ // If there is no diamond then there is only one path
+ // to (static_ptr, static_type) from here and we just found it.
+ if (!(__flags & __diamond_shaped_mask))
+ break;
+ }
+ else if (info->found_any_static_type)
+ {
+ // If we found a static_type that isn't the one we're looking
+ // for, and if there are no repeated types above here,
+ // then stop looking.
+ if (!(__flags & __non_diamond_repeat_mask))
+ break;
+ }
+ // Zero out found flags
+ info->found_our_static_ptr = false;
+ info->found_any_static_type = false;
+ p->search_above_dst(info, dst_ptr, current_ptr, path_below, use_strcmp);
+ found_our_static_ptr |= info->found_our_static_ptr;
+ found_any_static_type |= info->found_any_static_type;
+ } while (++p < e);
+ }
+ // Restore flags
+ info->found_our_static_ptr = found_our_static_ptr;
+ info->found_any_static_type = found_any_static_type;
+ }
+}
+
+// This is the same algorithm as __vmi_class_type_info::search_above_dst but
+// simplified to the case that there is only a single base class.
+void
+__si_class_type_info::search_above_dst(__dynamic_cast_info* info,
+ const void* dst_ptr,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_above_dst(info, dst_ptr, current_ptr, path_below);
+ else
+ __base_type->search_above_dst(info, dst_ptr, current_ptr, path_below, use_strcmp);
+}
+
+// This is the same algorithm as __vmi_class_type_info::search_above_dst but
+// simplified to the case that there is no base class.
+void
+__class_type_info::search_above_dst(__dynamic_cast_info* info,
+ const void* dst_ptr,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ if (is_equal(this, info->static_type, use_strcmp))
+ process_static_type_above_dst(info, dst_ptr, current_ptr, path_below);
+}
+
+// The search functions for __base_class_type_info are simply convenience
+// functions for adjusting the current_ptr and path_below as the search is
+// passed up to the base class node.
+
+void
+__base_class_type_info::search_above_dst(__dynamic_cast_info* info,
+ const void* dst_ptr,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ ptrdiff_t offset_to_base = __offset_flags >> __offset_shift;
+ if (__offset_flags & __virtual_mask)
+ {
+ const char* vtable = *static_cast<const char*const*>(current_ptr);
+ offset_to_base = *reinterpret_cast<const ptrdiff_t*>(vtable + offset_to_base);
+ }
+ __base_type->search_above_dst(info, dst_ptr,
+ static_cast<const char*>(current_ptr) + offset_to_base,
+ (__offset_flags & __public_mask) ?
+ path_below :
+ not_public_path,
+ use_strcmp);
+}
+
+void
+__base_class_type_info::search_below_dst(__dynamic_cast_info* info,
+ const void* current_ptr,
+ int path_below,
+ bool use_strcmp) const
+{
+ ptrdiff_t offset_to_base = __offset_flags >> __offset_shift;
+ if (__offset_flags & __virtual_mask)
+ {
+ const char* vtable = *static_cast<const char*const*>(current_ptr);
+ offset_to_base = *reinterpret_cast<const ptrdiff_t*>(vtable + offset_to_base);
+ }
+ __base_type->search_below_dst(info,
+ static_cast<const char*>(current_ptr) + offset_to_base,
+ (__offset_flags & __public_mask) ?
+ path_below :
+ not_public_path,
+ use_strcmp);
+}
+
+} // __cxxabiv1
Index: contrib/libcxxabi/src/stdlib_exception.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/stdlib_exception.cpp
@@ -0,0 +1,71 @@
+//===---------------------------- exception.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#define _LIBCPP_BUILDING_LIBRARY
+#include <new>
+#include <exception>
+
+namespace std
+{
+
+// exception
+
+exception::~exception() _NOEXCEPT
+{
+}
+
+const char* exception::what() const _NOEXCEPT
+{
+ return "std::exception";
+}
+
+// bad_exception
+
+bad_exception::~bad_exception() _NOEXCEPT
+{
+}
+
+const char* bad_exception::what() const _NOEXCEPT
+{
+ return "std::bad_exception";
+}
+
+
+// bad_alloc
+
+bad_alloc::bad_alloc() _NOEXCEPT
+{
+}
+
+bad_alloc::~bad_alloc() _NOEXCEPT
+{
+}
+
+const char*
+bad_alloc::what() const _NOEXCEPT
+{
+ return "std::bad_alloc";
+}
+
+// bad_array_new_length
+
+bad_array_new_length::bad_array_new_length() _NOEXCEPT
+{
+}
+
+bad_array_new_length::~bad_array_new_length() _NOEXCEPT
+{
+}
+
+const char*
+bad_array_new_length::what() const _NOEXCEPT
+{
+ return "bad_array_new_length";
+}
+
+} // std
Index: contrib/libcxxabi/src/stdlib_new_delete.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/stdlib_new_delete.cpp
@@ -0,0 +1,262 @@
+//===--------------------- stdlib_new_delete.cpp --------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//
+// This file implements the new and delete operators.
+//===----------------------------------------------------------------------===//
+
+#define _LIBCPP_BUILDING_LIBRARY
+#include "__cxxabi_config.h"
+#include <new>
+#include <cstdlib>
+
+#if !defined(_THROW_BAD_ALLOC) || !defined(_NOEXCEPT) || !defined(_LIBCXXABI_WEAK)
+#error The _THROW_BAD_ALLOC, _NOEXCEPT, and _LIBCXXABI_WEAK libc++ macros must \
+ already be defined by libc++.
+#endif
+// Implement all new and delete operators as weak definitions
+// in this shared library, so that they can be overridden by programs
+// that define non-weak copies of the functions.
+
+_LIBCXXABI_WEAK
+void *
+operator new(std::size_t size) _THROW_BAD_ALLOC
+{
+ if (size == 0)
+ size = 1;
+ void* p;
+ while ((p = ::malloc(size)) == 0)
+ {
+ // If malloc fails and there is a new_handler,
+ // call it to try free up memory.
+ std::new_handler nh = std::get_new_handler();
+ if (nh)
+ nh();
+ else
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ throw std::bad_alloc();
+#else
+ break;
+#endif
+ }
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new(size_t size, const std::nothrow_t&) _NOEXCEPT
+{
+ void* p = 0;
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ try
+ {
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ p = ::operator new(size);
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ }
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new[](size_t size) _THROW_BAD_ALLOC
+{
+ return ::operator new(size);
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new[](size_t size, const std::nothrow_t&) _NOEXCEPT
+{
+ void* p = 0;
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ try
+ {
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ p = ::operator new[](size);
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ }
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr) _NOEXCEPT
+{
+ if (ptr)
+ ::free(ptr);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr, const std::nothrow_t&) _NOEXCEPT
+{
+ ::operator delete(ptr);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr, size_t) _NOEXCEPT
+{
+ ::operator delete(ptr);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr) _NOEXCEPT
+{
+ ::operator delete(ptr);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr, const std::nothrow_t&) _NOEXCEPT
+{
+ ::operator delete[](ptr);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr, size_t) _NOEXCEPT
+{
+ ::operator delete[](ptr);
+}
+
+#if !defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION)
+
+_LIBCXXABI_WEAK
+void *
+operator new(std::size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
+{
+ if (size == 0)
+ size = 1;
+ if (static_cast<size_t>(alignment) < sizeof(void*))
+ alignment = std::align_val_t(sizeof(void*));
+ void* p;
+#if defined(_LIBCPP_WIN32API)
+ while ((p = _aligned_malloc(size, static_cast<size_t>(alignment))) == nullptr)
+#else
+ while (::posix_memalign(&p, static_cast<size_t>(alignment), size) != 0)
+#endif
+ {
+ // If posix_memalign fails and there is a new_handler,
+ // call it to try free up memory.
+ std::new_handler nh = std::get_new_handler();
+ if (nh)
+ nh();
+ else {
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ throw std::bad_alloc();
+#else
+ p = nullptr; // posix_memalign doesn't initialize 'p' on failure
+ break;
+#endif
+ }
+ }
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new(size_t size, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
+{
+ void* p = 0;
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ try
+ {
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ p = ::operator new(size, alignment);
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ }
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new[](size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
+{
+ return ::operator new(size, alignment);
+}
+
+_LIBCXXABI_WEAK
+void*
+operator new[](size_t size, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
+{
+ void* p = 0;
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ try
+ {
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ p = ::operator new[](size, alignment);
+#ifndef _LIBCXXABI_NO_EXCEPTIONS
+ }
+ catch (...)
+ {
+ }
+#endif // _LIBCXXABI_NO_EXCEPTIONS
+ return p;
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr, std::align_val_t) _NOEXCEPT
+{
+ if (ptr)
+#if defined(_LIBCPP_WIN32API)
+ ::_aligned_free(ptr);
+#else
+ ::free(ptr);
+#endif
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
+{
+ ::operator delete(ptr, alignment);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete(void* ptr, size_t, std::align_val_t alignment) _NOEXCEPT
+{
+ ::operator delete(ptr, alignment);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr, std::align_val_t alignment) _NOEXCEPT
+{
+ ::operator delete(ptr, alignment);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr, std::align_val_t alignment, const std::nothrow_t&) _NOEXCEPT
+{
+ ::operator delete[](ptr, alignment);
+}
+
+_LIBCXXABI_WEAK
+void
+operator delete[] (void* ptr, size_t, std::align_val_t alignment) _NOEXCEPT
+{
+ ::operator delete[](ptr, alignment);
+}
+
+#endif // !_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
Index: contrib/libcxxabi/src/stdlib_stdexcept.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/stdlib_stdexcept.cpp
@@ -0,0 +1,47 @@
+//===------------------------ stdexcept.cpp -------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "include/refstring.h"
+#include "stdexcept"
+#include "new"
+#include <cstdlib>
+#include <cstring>
+#include <cstdint>
+#include <cstddef>
+
+static_assert(sizeof(std::__libcpp_refstring) == sizeof(const char *), "");
+
+namespace std // purposefully not using versioning namespace
+{
+
+logic_error::~logic_error() _NOEXCEPT {}
+
+const char*
+logic_error::what() const _NOEXCEPT
+{
+ return __imp_.c_str();
+}
+
+runtime_error::~runtime_error() _NOEXCEPT {}
+
+const char*
+runtime_error::what() const _NOEXCEPT
+{
+ return __imp_.c_str();
+}
+
+domain_error::~domain_error() _NOEXCEPT {}
+invalid_argument::~invalid_argument() _NOEXCEPT {}
+length_error::~length_error() _NOEXCEPT {}
+out_of_range::~out_of_range() _NOEXCEPT {}
+
+range_error::~range_error() _NOEXCEPT {}
+overflow_error::~overflow_error() _NOEXCEPT {}
+underflow_error::~underflow_error() _NOEXCEPT {}
+
+} // std
Index: contrib/libcxxabi/src/stdlib_typeinfo.cpp
===================================================================
--- /dev/null
+++ contrib/libcxxabi/src/stdlib_typeinfo.cpp
@@ -0,0 +1,52 @@
+//===----------------------------- typeinfo.cpp ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <typeinfo>
+
+namespace std
+{
+
+// type_info
+
+type_info::~type_info()
+{
+}
+
+// bad_cast
+
+bad_cast::bad_cast() _NOEXCEPT
+{
+}
+
+bad_cast::~bad_cast() _NOEXCEPT
+{
+}
+
+const char*
+bad_cast::what() const _NOEXCEPT
+{
+ return "std::bad_cast";
+}
+
+// bad_typeid
+
+bad_typeid::bad_typeid() _NOEXCEPT
+{
+}
+
+bad_typeid::~bad_typeid() _NOEXCEPT
+{
+}
+
+const char*
+bad_typeid::what() const _NOEXCEPT
+{
+ return "std::bad_typeid";
+}
+
+} // std
Index: lib/Makefile
===================================================================
--- lib/Makefile
+++ lib/Makefile
@@ -16,6 +16,7 @@
libcompiler_rt \
${_libclang_rt} \
${_libcplusplus} \
+ ${_libcplusplusabi} \
${_libcxxrt} \
libelf \
msun
@@ -105,7 +106,11 @@
SUBDIR_DEPEND_libarchive= libz libbz2 libexpat liblzma libmd
SUBDIR_DEPEND_libauditdm= libbsm
SUBDIR_DEPEND_libbsnmp= ${_libnetgraph}
+.if ${MK_LIBCXXABI} != "no"
+SUBDIR_DEPEND_libc++:= libc++abi
+.else
SUBDIR_DEPEND_libc++:= libcxxrt
+.endif
SUBDIR_DEPEND_libc= libcompiler_rt
SUBDIR_DEPEND_libcam= libsbuf
SUBDIR_DEPEND_libcasper= libnv
@@ -163,7 +168,11 @@
.endif
.if ${MK_LIBCPLUSPLUS} != "no"
+.if ${MK_LIBCXXABI} != "no"
+_libcplusplusabi= libc++abi
+.else
_libcxxrt= libcxxrt
+.endif
_libcplusplus= libc++
_libcplusplus+= libc++experimental
_libcplusplus+= libc++fs
Index: lib/libc++/Makefile
===================================================================
--- lib/libc++/Makefile
+++ lib/libc++/Makefile
@@ -3,7 +3,11 @@
.include <src.opts.mk>
PACKAGE= clibs
+.if ${MK_LIBCXXABI} != "no"
+_LIBCXXABIDIR= ${SRCTOP}/contrib/libcxxabi
+.else
_LIBCXXRTDIR= ${SRCTOP}/contrib/libcxxrt
+.endif
HDRDIR= ${SRCTOP}/contrib/libc++/include
SRCDIR= ${SRCTOP}/contrib/libc++/src
CXXINCLUDEDIR= ${INCLUDEDIR}/c++/v${SHLIB_MAJOR}
@@ -15,7 +19,11 @@
LIB= c++
SHLIB_MAJOR= 1
+.if ${MK_LIBCXXABI} != "no"
+SHLIB_LDSCRIPT= libc++.ldscript.cxxabi
+.else
SHLIB_LDSCRIPT= libc++.ldscript
+.endif
SRCS+= algorithm.cpp
SRCS+= any.cpp
@@ -52,6 +60,8 @@
SRCS+= filesystem/int128_builtins.cpp
SRCS+= filesystem/operations.cpp
+.if ${MK_LIBCXXABI} != "no"
+.else
CXXRT_SRCS+= auxhelper.cc
CXXRT_SRCS+= dynamic_cast.cc
CXXRT_SRCS+= exception.cc
@@ -68,19 +78,33 @@
cxxrt_${_S}: ${_LIBCXXRTDIR}/${_S} .NOMETA
ln -sf ${.ALLSRC} ${.TARGET}
.endfor
+.endif
WARNS= 0
CFLAGS+= -isystem ${HDRDIR}
+.if ${MK_LIBCXXABI} != "no"
+CFLAGS+= -isystem ${_LIBCXXABIDIR}/include
+.else
CFLAGS+= -isystem ${_LIBCXXRTDIR}
+.endif
CFLAGS+= -nostdinc++
CFLAGS+= -nostdlib
CFLAGS+= -D_LIBCPP_BUILDING_LIBRARY
+.if ${MK_LIBCXXABI} != "no"
+CFLAGS+= -DLIBCXX_BUILDING_LIBCXXABI
+.else
CFLAGS+= -DLIBCXXRT
+.endif
.if empty(CXXFLAGS:M-std=*)
CXXFLAGS+= -std=c++11
.endif
+.if ${MK_LIBCXXABI} != "no"
+LIBADD+= cplusplusabi
+.else
LIBADD+= cxxrt
+.endif
+
INCSGROUPS= STD EXP EXT
STD_HEADERS+= __bit_reference
@@ -213,17 +237,21 @@
STD_HEADERS+= wchar.h
STD_HEADERS+= wctype.h
+.if ${MK_LIBCXXABI} != "no"
+.else
RT_HEADERS+= cxxabi.h
RT_HEADERS+= unwind-arm.h
RT_HEADERS+= unwind-itanium.h
RT_HEADERS+= unwind.h
+.for hdr in ${RT_HEADERS}
+STD+= ${_LIBCXXRTDIR}/${hdr}
+.endfor
+.endif
+
.for hdr in ${STD_HEADERS}
STD+= ${HDRDIR}/${hdr}
INCSLINKS+= ../${hdr} ${CXXINCLUDEDIR}/tr1/${hdr}
-.endfor
-.for hdr in ${RT_HEADERS}
-STD+= ${_LIBCXXRTDIR}/${hdr}
.endfor
STDDIR= ${CXXINCLUDEDIR}
Index: lib/libc++/libc++.ldscript
===================================================================
--- lib/libc++/libc++.ldscript
+++ lib/libc++/libc++.ldscript
@@ -1,2 +1,2 @@
/* $FreeBSD$ */
-GROUP ( @@SHLIB@@ @@LIBDIR@@/libcxxrt.so )
+GROUP ( =@@SHLIB@@ =@@LIBDIR@@/libcxxrt.so )
Index: lib/libc++/libc++.ldscript.cxxabi
===================================================================
--- /dev/null
+++ lib/libc++/libc++.ldscript.cxxabi
@@ -0,0 +1,2 @@
+/* $FreeBSD: head/lib/libc++/libc++.ldscript 305102 2016-08-31 00:11:35Z bapt $ */
+GROUP ( =@@SHLIB@@ =@@LIBDIR@@/libc++abi.so )
Index: lib/libc++abi/Makefile
===================================================================
--- lib/libc++abi/Makefile
+++ lib/libc++abi/Makefile
@@ -1,27 +1,45 @@
-# $FreeBSD: head/lib/libcxxrt/Makefile 312504 2017-01-20 04:53:00Z ngie $
+# $FreeBSD: head/lib/libcxxabi/Makefile 312504 2017-01-20 04:53:00Z ngie $
PACKAGE= clibs
-SRCDIR= ${SRCTOP}/contrib/libcxxrt
+SRCDIR= ${SRCTOP}/contrib/libcxxabi
+LIBCXXDIR= ${SRCTOP}/contrib/libc++
+LIBUNWINDDIR= ${SRCTOP}/contrib/libunwind
SHLIB_MAJOR= 1
SHLIBDIR?= /lib
-.PATH: ${SRCDIR}
+.PATH: ${SRCDIR}/src
-LIB= cxxrt
+LIB= c++abi
-SRCS+= libelftc_dem_gnu3.c\
- terminate.cc\
- dynamic_cast.cc\
- memory.cc\
- auxhelper.cc\
- exception.cc\
- stdexcept.cc\
- typeinfo.cc\
- guard.cc
+SRCS+= cxa_aux_runtime.cpp \
+ cxa_default_handlers.cpp \
+ cxa_demangle.cpp \
+ cxa_exception.cpp \
+ cxa_exception_storage.cpp \
+ cxa_guard.cpp \
+ cxa_handlers.cpp \
+ cxa_personality.cpp \
+ cxa_thread_atexit.cpp \
+ cxa_unexpected.cpp \
+ cxa_vector.cpp \
+ cxa_virtual.cpp \
+ stdlib_exception.cpp \
+ stdlib_stdexcept.cpp \
+ stdlib_typeinfo.cpp \
+ abort_message.cpp \
+ fallback_malloc.cpp \
+ private_typeinfo.cpp \
+#Not sure?
+#SRCS+= stdlib_new_delete.cpp
+
WARNS= 0
-CFLAGS+= -isystem ${SRCDIR} -nostdinc++
+CFLAGS+= -isystem ${SRCDIR}/include
+CFLAGS+= -isystem ${LIBUNWINDDIR}/include
+CFLAGS+= -isystem ${LIBCXXDIR}/include -nostdinc++
+CFLAGS+= -DHAVE___CXA_THREAD_ATEXIT_IMPL
+CFLAGS+= -DHAS_THREAD_LOCAL
.if empty(CXXFLAGS:M-std=*)
CXXFLAGS+= -std=c++11
.endif
Index: lib/libc++abi/Version.map
===================================================================
--- lib/libc++abi/Version.map
+++ lib/libc++abi/Version.map
@@ -1,6 +1,6 @@
-# $FreeBSD: head/lib/libcxxrt/Version.map 328305 2018-01-23 22:41:13Z emaste $
+# $FreeBSD: head/lib/libcxxabi/Version.map 328305 2018-01-23 22:41:13Z emaste $
# Define the same version as the libsupc++ from gcc 4.2.1 so that we can use
-# libcxxrt as a drop-in replacement.
+# libcxxabi as a drop-in replacement.
CXXABI_1.3 {
Index: lib/libcompiler_rt/Makefile
===================================================================
--- lib/libcompiler_rt/Makefile
+++ lib/libcompiler_rt/Makefile
@@ -10,7 +10,11 @@
CFLAGS+= ${PICFLAG}
CFLAGS+= -fvisibility=hidden
CFLAGS+= -DVISIBILITY_HIDDEN
+.if ${MK_LIBCXXABI} != "no"
+CFLAGS+= -I${SRCTOP}/contrib/libunwind/include
+.else
CFLAGS+= -I${SRCTOP}/contrib/libcxxrt
+.endif
.if ${COMPILER_TYPE} == "clang"
CWARNFLAGS.gcc_personality_v0.c+= -Wno-typedef-redefinition
Index: lib/libopencsd/Makefile
===================================================================
--- lib/libopencsd/Makefile
+++ lib/libopencsd/Makefile
@@ -166,7 +166,11 @@
INCSGROUPS=INCS APIINCS ETMV3INCS ETMV4INCS PTMINCS STMINCS
+.if ${MK_LIBCXXABI}
+LIBADD= cplusplusabi
+.else
LIBADD= cxxrt
+.endif
WARNS?= 1
Index: lib/libproc/Makefile
===================================================================
--- lib/libproc/Makefile
+++ lib/libproc/Makefile
@@ -20,7 +20,11 @@
.if ${MK_CXX} == "no"
CFLAGS+= -DNO_CXA_DEMANGLE
.elif ${MK_LIBCPLUSPLUS} != "no"
+.if ${MK_LIBCXXABI} != "no"
+LIBADD+= cplusplusabi
+.else
LIBADD+= cxxrt
+.endif
.else
LIBADD+= supcplusplus
.endif
Index: share/mk/src.libnames.mk
===================================================================
--- share/mk/src.libnames.mk
+++ share/mk/src.libnames.mk
@@ -83,6 +83,7 @@
cap_syslog \
com_err \
compiler_rt \
+ cplusplusabi \
crypt \
crypto \
ctf \
@@ -277,7 +278,11 @@
_DP_procstat= kvm util elf
.if ${MK_CXX} == "yes"
.if ${MK_LIBCPLUSPLUS} != "no"
+.if ${MK_LIBCXXABI} != "no"
+_DP_proc= cplusplusabi
+.else
_DP_proc= cxxrt
+.endif
.else
_DP_proc= supcplusplus
.endif
@@ -331,7 +336,11 @@
_DP_lzma= pthread
_DP_ucl= m
_DP_vmmapi= util
+.if ${MK_LIBCXXABI} != "no"
+_DP_opencsd= cplusplusabi
+.else
_DP_opencsd= cxxrt
+.endif
_DP_ctf= z
_DP_dtrace= ctf elf proc pthread rtld_db
_DP_xo= util
@@ -373,6 +382,7 @@
.endif
# Define special cases
+LDADD_cplusplusabi= -lc++abi
LDADD_supcplusplus= -lsupc++
LIBATF_C= ${LIBDESTDIR}${LIBDIR_BASE}/libprivateatf-c.a
LIBATF_CXX= ${LIBDESTDIR}${LIBDIR_BASE}/libprivateatf-c++.a
@@ -566,6 +576,7 @@
LIBBLACKLISTDIR= ${OBJTOP}/lib/libblacklist
LIBBLOCKSRUNTIMEDIR= ${OBJTOP}/lib/libblocksruntime
LIBBSNMPDIR= ${OBJTOP}/lib/libbsnmp/libbsnmp
+LIBCPLUSPLUSABIDIR= ${OBJTOP}/lib/libc++abi
LIBCASPERDIR= ${OBJTOP}/lib/libcasper/libcasper
LIBCAP_DNSDIR= ${OBJTOP}/lib/libcasper/services/cap_dns
LIBCAP_GRPDIR= ${OBJTOP}/lib/libcasper/services/cap_grp
Index: share/mk/src.opts.mk
===================================================================
--- share/mk/src.opts.mk
+++ share/mk/src.opts.mk
@@ -201,6 +201,7 @@
EXPERIMENTAL \
GNU_GREP_COMPAT \
HESIOD \
+ LIBCXXABI \
LIBSOFT \
LOADER_FIREWIRE \
LOADER_FORCE_LE \
Index: tools/build/mk/OptionalObsoleteFiles.inc
===================================================================
--- tools/build/mk/OptionalObsoleteFiles.inc
+++ tools/build/mk/OptionalObsoleteFiles.inc
@@ -4315,16 +4315,12 @@
.endif
.if ${MK_LIBCPLUSPLUS} == no
-OLD_LIBS+=lib/libcxxrt.so.1
OLD_FILES+=usr/lib/libc++.a
OLD_FILES+=usr/lib/libc++_p.a
OLD_FILES+=usr/lib/libc++experimental.a
OLD_FILES+=usr/lib/libc++fs.a
OLD_FILES+=usr/lib/libc++.so
OLD_LIBS+=usr/lib/libc++.so.1
-OLD_FILES+=usr/lib/libcxxrt.a
-OLD_FILES+=usr/lib/libcxxrt.so
-OLD_FILES+=usr/lib/libcxxrt_p.a
OLD_FILES+=usr/include/c++/v1/__bit_reference
OLD_FILES+=usr/include/c++/v1/__bsd_locale_defaults.h
OLD_FILES+=usr/include/c++/v1/__bsd_locale_fallbacks.h
@@ -4621,14 +4617,32 @@
OLD_FILES+=usr/lib32/libc++_p.a
OLD_FILES+=usr/lib32/libc++experimental.a
OLD_FILES+=usr/lib32/libc++fs.a
-OLD_FILES+=usr/lib32/libcxxrt.a
-OLD_FILES+=usr/lib32/libcxxrt.so
-OLD_LIBS+=usr/lib32/libcxxrt.so.1
-OLD_FILES+=usr/lib32/libcxxrt_p.a
OLD_DIRS+=usr/include/c++/v1/tr1
OLD_DIRS+=usr/include/c++/v1/experimental
OLD_DIRS+=usr/include/c++/v1/ext
OLD_DIRS+=usr/include/c++/v1
+.endif
+
+.if ${MK_LIBCPLUSPLUS} == no || ${MK_LIBCXXABI} != no
+OLD_LIBS+=lib/libcxxrt.so.1
+OLD_FILES+=usr/lib/libcxxrt.a
+OLD_FILES+=usr/lib/libcxxrt.so
+OLD_FILES+=usr/lib/libcxxrt_p.a
+OLD_FILES+=usr/lib32/libcxxrt.a
+OLD_FILES+=usr/lib32/libcxxrt.so
+OLD_LIBS+=usr/lib32/libcxxrt.so.1
+OLD_FILES+=usr/lib32/libcxxrt_p.a
+.endif
+
+.if ${MK_LIBCPLUSPLUS} == no || ${MK_LIBCXXABI} == no
+OLD_LIBS+=lib/libc++abi.so.1
+OLD_FILES+=usr/lib/libc++abi.a
+OLD_FILES+=usr/lib/libc++abi.so
+OLD_FILES+=usr/lib/libc++abi_p.a
+OLD_FILES+=usr/lib32/libc++abi.a
+OLD_FILES+=usr/lib32/libc++abi.so
+OLD_LIBS+=usr/lib32/libc++abi.so.1
+OLD_FILES+=usr/lib32/libc++abi_p.a
.endif
.if ${MK_LIBTHR} == no
Index: tools/build/options/WITH_LIBCXXABI
===================================================================
--- /dev/null
+++ tools/build/options/WITH_LIBCXXABI
@@ -0,0 +1 @@
+Use LLVM's libcxxabi as the C++ ABI runtime support library instead of libcxxrt.

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