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c6479f8b2a
This adds a multi-threaded testcase that has all threads in the process exit with a different exit code, and ensures that GDB reports the thread group leader's exit status as the whole-process exit status. Before this set of patches, this would randomly report the exit code of some other thread, and thus fail. Tested on Linux-x86_64, native and gdbserver. Co-Authored-By: Pedro Alves <pedro@palves.net> Change-Id: I30cba2ff4576fb01b5169cc72667f3268d919557
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2022 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#define NUM_THREADS 32
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pthread_barrier_t barrier;
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static void
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do_exit (int exitcode)
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{
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/* Synchronize all threads up to here so that they all exit at
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roughly the same time. */
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pthread_barrier_wait (&barrier);
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/* All threads exit with SYS_exit, even the main thread, to avoid
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exiting with a group-exit syscall, as that syscall changes the
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exit status of all still-alive threads, thus potentially masking
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a bug. */
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syscall (SYS_exit, exitcode);
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}
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static void *
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start (void *arg)
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{
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int thread_return_value = *(int *) arg;
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do_exit (thread_return_value);
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}
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int
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main(void)
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{
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pthread_t threads[NUM_THREADS];
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int thread_return_val[NUM_THREADS];
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int i;
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pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
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for (i = 0; i < NUM_THREADS; ++i)
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{
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thread_return_val[i] = i + 2;
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pthread_create (&threads[i], NULL, start, &thread_return_val[i]);
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}
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do_exit (1);
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}
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