| /* Bug 14333: Support file for atexit/exit, etc. race tests. |
| Copyright (C) 2017-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* This file must be run from within a directory called "stdlib". */ |
| |
| /* The atexit/exit, at_quick_exit/quick_exit, __cxa_atexit/exit, etc. |
| exhibited data race while accessing destructor function list (Bug 14333). |
| |
| This test spawns large number of threads, which all race to register |
| large number of destructors. |
| |
| Before the fix, running this test resulted in a SIGSEGV. |
| After the fix, we expect clean process termination. */ |
| |
| #if !defined(CALL_EXIT) || !defined(CALL_ATEXIT) |
| #error Must define CALL_EXIT and CALL_ATEXIT before using this file. |
| #endif |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <support/xthread.h> |
| #include <limits.h> |
| |
| const size_t kNumThreads = 1024; |
| const size_t kNumHandlers = 1024; |
| const size_t kStacksize = |
| 0x20000 < PTHREAD_STACK_MIN ? PTHREAD_STACK_MIN : 0x20000; |
| |
| static void * |
| threadfunc (void *unused) |
| { |
| size_t i; |
| for (i = 0; i < kNumHandlers; ++i) { |
| CALL_ATEXIT; |
| } |
| return NULL; |
| } |
| |
| static int |
| do_test (void) |
| { |
| size_t i; |
| pthread_attr_t attr; |
| |
| xpthread_attr_init (&attr); |
| xpthread_attr_setdetachstate (&attr, 1); |
| |
| /* With default 8MiB Linux stack size, creating 1024 threads can cause |
| VM exhausiton on 32-bit machines. Reduce stack size of each thread to |
| 128KiB for a maximum required VM size of 128MiB. */ |
| xpthread_attr_setstacksize (&attr, kStacksize); |
| |
| for (i = 0; i < kNumThreads; ++i) { |
| xpthread_create (&attr, threadfunc, NULL); |
| } |
| xpthread_attr_destroy (&attr); |
| |
| CALL_EXIT; |
| } |
| |
| #define TEST_FUNCTION do_test |
| #include <support/test-driver.c> |