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contrib/libcxxabi/src/cxa_default_handlers.cpp
- This file was added.
| Property | Old Value | New Value |
|---|---|---|
| svn:eol-style | null | native \ No newline at end of property |
| svn:keywords | null | FreeBSD=%H \ No newline at end of property |
| svn:mime-type | null | text/plain \ No newline at end of property |
| //===------------------------- 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); | |||||
| } | |||||
| } | |||||