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/* This testcase is part of GDB, the GNU debugger.
Copyright 2021-2022 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#define NUM_FORKING_THREADS 12
static pthread_barrier_t barrier;
static volatile int should_exit = 0;
static void
sigusr1_handler (int sig, siginfo_t *siginfo, void *context)
{
should_exit = 1;
}
static void *
forking_thread (void *arg)
{
/* Wait for all forking threads to have spawned before fork-spamming. */
pthread_barrier_wait (&barrier);
while (!should_exit)
{
pid_t pid = fork ();
if (pid == 0)
{
/* Child */
exit (8);
}
else
{
/* Parent */
int status;
int ret = waitpid (pid, &status, 0);
assert (ret == pid);
assert (WIFEXITED (status));
assert (WEXITSTATUS (status) == 8);
}
}
return NULL;
}
static void
break_here_first (void)
{
}
static pid_t my_pid;
int
main (void)
{
pthread_t forking_threads[NUM_FORKING_THREADS];
int ret;
struct sigaction sa;
int i;
/* Just to make sure we don't run for ever. */
alarm (30);
my_pid = getpid ();
break_here_first ();
pthread_barrier_init (&barrier, NULL, NUM_FORKING_THREADS);
memset (&sa, 0, sizeof (sa));
sa.sa_sigaction = sigusr1_handler;
ret = sigaction (SIGUSR1, &sa, NULL);
assert (ret == 0);
for (i = 0; i < NUM_FORKING_THREADS; ++i)
{
ret = pthread_create (&forking_threads[i], NULL, forking_thread, NULL);
assert (ret == 0);
}
for (i = 0; i < NUM_FORKING_THREADS; ++i)
{
ret = pthread_join (forking_threads[i], NULL);
assert (ret == 0);
}
FILE *f = fopen (TOUCH_FILE_PATH, "w");
assert (f != NULL);
ret = fclose (f);
assert (ret == 0);
return 0;
}
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