forked from Imagelibrary/binutils-gdb
a345d14fa6
I ran into a test failure on gdb.python/py-thread-exited.c. The test creates two threads and then catches the thread exits in Python. The test expects the threads to exit in a specific order. As the test is currently written, it is _likely_, but not guaranteed, that the threads will exit in the same order they are created, which is what the test expects. When running on a loaded system I ran into a case where the threads exited in the reverse creation order, which caused the test to fail. I could fix this by having the .exp file not care about the thread order, or by changing the C file to force the order. I chose the later, and added a pthread_barrier_t to ensure the threads exit in the correct order. There should be no change in what is tested after this commit.
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2022-2023 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 <stdio.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <signal.h>
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pthread_t thread2_id;
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pthread_t thread3_id;
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void* do_thread (void* d)
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{
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if (d != NULL)
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{
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pthread_barrier_t *barrier = (pthread_barrier_t *) d;
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pthread_barrier_wait (barrier);
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}
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return NULL; /* In thread */
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}
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int main (void)
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{
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/* We want the threads to exit in a known order. Use a barrier to ensure
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the second thread doesn't exit until the first has been joined. */
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pthread_barrier_t barrier;
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pthread_barrier_init (&barrier, NULL, 2);
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pthread_create (&thread2_id, NULL, do_thread, NULL);
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pthread_create (&thread3_id, NULL, do_thread, &barrier);
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pthread_join (thread2_id, NULL);
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pthread_barrier_wait (&barrier);
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pthread_join (thread3_id, NULL);
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return 12; /* Done */
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}
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