92 lines
2.1 KiB
C
92 lines
2.1 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/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <assert.h>
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#include <limits.h>
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/* Number of threads doing forks. */
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#define N_FORKERS 4
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static void *
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forker (void *arg)
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{
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for (;;)
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{
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pid_t pid = FORK_FUNC ();
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if (pid == 0)
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_exit (11);
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assert (pid > 0);
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/* Wait for children to exit. */
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int ret;
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int stat;
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do
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{
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ret = waitpid (pid, &stat, 0);
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} while (ret == EINTR);
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assert (ret == pid);
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assert (WIFEXITED (stat));
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assert (WEXITSTATUS (stat) == 11);
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/* We need a sleep, otherwise the forking threads spam events and the
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stepping thread doesn't make progress. Sleep for a bit less than
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`sleep_a_bit` does, so that forks are likely to interrupt a "next". */
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usleep (40 * 1000);
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}
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return NULL;
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}
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static void
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sleep_a_bit (void)
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{
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usleep (1000 * 50);
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}
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int
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main (void)
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{
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int i;
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alarm (60);
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pthread_t thread[N_FORKERS];
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for (i = 0; i < N_FORKERS; ++i)
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{
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int ret = pthread_create (&thread[i], NULL, forker, NULL);
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assert (ret == 0);
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}
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for (i = 0; i < INT_MAX; ++i) /* for loop */
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{
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sleep_a_bit (); /* break here */
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sleep_a_bit (); /* other line */
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}
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for (i = 0; i < N_FORKERS; ++i)
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pthread_join (thread[i], NULL);
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return 0;
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}
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