82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* Bug 14333: Support file for atexit/exit, etc. race tests.
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Copyright (C) 2017-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This file must be run from within a directory called "stdlib". */
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/* The atexit/exit, at_quick_exit/quick_exit, __cxa_atexit/exit, etc.
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exhibited data race while accessing destructor function list (Bug 14333).
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This test spawns large number of threads, which all race to register
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large number of destructors.
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Before the fix, running this test resulted in a SIGSEGV.
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After the fix, we expect clean process termination. */
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#if !defined(CALL_EXIT) || !defined(CALL_ATEXIT)
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#error Must define CALL_EXIT and CALL_ATEXIT before using this file.
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <support/xthread.h>
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#include <limits.h>
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const size_t kNumThreads = 1024;
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const size_t kNumHandlers = 1024;
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static void *
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threadfunc (void *unused)
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{
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size_t i;
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for (i = 0; i < kNumHandlers; ++i) {
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CALL_ATEXIT;
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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size_t i;
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pthread_attr_t attr;
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xpthread_attr_init (&attr);
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xpthread_attr_setdetachstate (&attr, 1);
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/* With default 8MiB Linux stack size, creating 1024 threads can cause
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VM exhausiton on 32-bit machines. Reduce stack size of each thread to
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128KiB for a maximum required VM size of 128MiB. */
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size_t kStacksize =
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#ifdef PTHREAD_STACK_MIN
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0x20000 < PTHREAD_STACK_MIN ? PTHREAD_STACK_MIN :
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#endif
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0x20000;
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xpthread_attr_setstacksize (&attr, kStacksize);
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for (i = 0; i < kNumThreads; ++i) {
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xpthread_create (&attr, threadfunc, NULL);
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}
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xpthread_attr_destroy (&attr);
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CALL_EXIT;
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}
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#define TEST_FUNCTION do_test
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#include <support/test-driver.c>
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