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/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
static char fname[] = "/tmp/tst-cond12-XXXXXX";
static int fd;
static void prepare (void);
#define PREPARE(argc, argv) prepare ()
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static void
prepare (void)
{
fd = mkstemp (fname);
if (fd == -1)
{
printf ("mkstemp failed: %m\n");
exit (1);
}
add_temp_file (fname);
if (ftruncate (fd, 1000) < 0)
{
printf ("ftruncate failed: %m\n");
exit (1);
}
}
static int
do_test (void)
{
struct
{
pthread_mutex_t m;
pthread_cond_t c;
int var;
} *p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED)
{
printf ("initial mmap failed: %m\n");
return 1;
}
pthread_mutexattr_t ma;
if (pthread_mutexattr_init (&ma) != 0)
{
puts ("mutexattr_init failed");
return 1;
}
if (pthread_mutexattr_setpshared (&ma, 1) != 0)
{
puts ("mutexattr_setpshared failed");
return 1;
}
if (pthread_mutex_init (&p->m, &ma) != 0)
{
puts ("mutex_init failed");
return 1;
}
if (pthread_mutexattr_destroy (&ma) != 0)
{
puts ("mutexattr_destroy failed");
return 1;
}
pthread_condattr_t ca;
if (pthread_condattr_init (&ca) != 0)
{
puts ("condattr_init failed");
return 1;
}
if (pthread_condattr_setpshared (&ca, 1) != 0)
{
puts ("condattr_setpshared failed");
return 1;
}
if (pthread_cond_init (&p->c, &ca) != 0)
{
puts ("mutex_init failed");
return 1;
}
if (pthread_condattr_destroy (&ca) != 0)
{
puts ("condattr_destroy failed");
return 1;
}
if (pthread_mutex_lock (&p->m) != 0)
{
puts ("initial mutex_lock failed");
return 1;
}
p->var = 42;
pid_t pid = fork ();
if (pid == -1)
{
printf ("fork failed: %m\n");
return 1;
}
if (pid == 0)
{
void *oldp = p;
p = mmap (NULL, sizeof (*p), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == oldp)
{
puts ("child: mapped to same address");
kill (getppid (), SIGKILL);
exit (1);
}
munmap (oldp, sizeof (*p));
if (pthread_mutex_lock (&p->m) != 0)
{
puts ("child: mutex_lock failed");
kill (getppid (), SIGKILL);
exit (1);
}
p->var = 0;
#ifndef USE_COND_SIGNAL
if (pthread_cond_broadcast (&p->c) != 0)
{
puts ("child: cond_broadcast failed");
kill (getppid (), SIGKILL);
exit (1);
}
#else
if (pthread_cond_signal (&p->c) != 0)
{
puts ("child: cond_signal failed");
kill (getppid (), SIGKILL);
exit (1);
}
#endif
if (pthread_mutex_unlock (&p->m) != 0)
{
puts ("child: mutex_unlock failed");
kill (getppid (), SIGKILL);
exit (1);
}
exit (0);
}
do
pthread_cond_wait (&p->c, &p->m);
while (p->var != 0);
if (TEMP_FAILURE_RETRY (waitpid (pid, NULL, 0)) != pid)
{
printf ("waitpid failed: %m\n");
kill (pid, SIGKILL);
return 1;
}
return 0;
}
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