Differential D19027 Diff 53454 head/lib/libc/tests/stdlib/dynthr_test.c

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head/lib/libc/tests/stdlib/dynthr_test.c

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svn:keywords	null	FreeBSD=%H \ No newline at end of property
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				/*
				* SPDX-License-Identifier: BSD-2-Clause
				*
				* Copyright (C) 2019 Andrew Gierth
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* Though this file is initially distributed under the 2-clause BSD license,
				* the author grants permission for its redistribution under alternative
				* licenses as set forth at <https://rhodiumtoad.github.io/RELICENSE.txt>.
				* This paragraph and the RELICENSE.txt file are not part of the license and
				* may be omitted in redistributions.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <stdio.h>
				#include <stdlib.h>
				#include <stdarg.h>
				#include <string.h>
				#include <unistd.h>
				#include <dlfcn.h>

				#include <atf-c.h>

				typedef void (modfunc_t)(int op);

				/*
				* Minimal test case for PR 235158; mutual dependencies between jemalloc and
				* libthr causing issues in thread creation. Specifically to this case, libthr
				* uses calloc to initialize pthread mutexes, and jemalloc uses pthread mutexes.
				*
				* Deferred initialization provided by jemalloc proved to be fragile, causing
				* issues like in the referenced PR where thread creation in a shared object
				* loaded via dlopen(3) would stall unless the calling application also linked
				* against pthread.
				*/
				ATF_TC(maintc);
				ATF_TC_HEAD(maintc, tc)
				{

				atf_tc_set_md_var(tc, "timeout", "3");
				}

				ATF_TC_BODY(maintc, tc)
				{
				char *libpath;
				modfunc_t *func;
				void *mod_handle;
				const char *srcdir;
				dlfunc_t rawfunc;

				srcdir = atf_tc_get_config_var(tc, "srcdir");
				if (asprintf(&libpath, "%s/dynthr_mod.so", srcdir) < 0)
				atf_tc_fail("failed to construct path to libthr");
				mod_handle = dlopen(libpath, RTLD_LOCAL);
				free(libpath);
				if (mod_handle == NULL)
				atf_tc_fail("failed to open dynthr_mod.so: %s", dlerror());
				rawfunc = dlfunc(mod_handle, "mod_main");
				if (rawfunc == NULL)
				atf_tc_fail("failed to resolve function mod_main");
				func = (modfunc_t *)rawfunc;
				func(1);
				func(0);
				}

				ATF_TP_ADD_TCS(tp)
				{

				ATF_TP_ADD_TC(tp, maintc);
				return (atf_no_error());
				}