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/* Test if a syscall is correctly restarted.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <support/xsignal.h>
#include <support/check.h>
#include <support/process_state.h>
#include <support/xunistd.h>
#include <support/xthread.h>
#include <sys/wait.h>
static int
check_pid (pid_t pid)
{
/* Wait until the child has called pause and it blocking on kernel. */
support_process_state_wait (pid, support_process_state_sleeping);
TEST_COMPARE (kill (pid, SIGSTOP), 0);
/* Adding process_state_tracing_stop ('t') allows the test to work under
trace programs such as ptrace. */
support_process_state_wait (pid, support_process_state_stopped
| support_process_state_tracing_stop);
TEST_COMPARE (kill (pid, SIGCONT), 0);
enum support_process_state state
= support_process_state_wait (pid, support_process_state_sleeping
| support_process_state_zombie);
TEST_COMPARE (state, support_process_state_sleeping);
TEST_COMPARE (kill (pid, SIGTERM), 0);
siginfo_t info;
TEST_COMPARE (waitid (P_PID, pid, &info, WEXITED), 0);
TEST_COMPARE (info.si_signo, SIGCHLD);
TEST_COMPARE (info.si_code, CLD_KILLED);
TEST_COMPARE (info.si_status, SIGTERM);
TEST_COMPARE (info.si_pid, pid);
return 0;
}
static void *
tf (void *closure)
{
pause ();
return NULL;
}
static void
child_mt (void)
{
/* Let only the created thread to handle signals. */
sigset_t set;
sigfillset (&set);
xpthread_sigmask (SIG_BLOCK, &set, NULL);
sigdelset (&set, SIGSTOP);
sigdelset (&set, SIGCONT);
sigdelset (&set, SIGTERM);
pthread_attr_t attr;
xpthread_attr_init (&attr);
TEST_COMPARE (pthread_attr_setsigmask_np (&attr, &set), 0);
xpthread_join (xpthread_create (&attr, tf, NULL));
}
static void
do_test_syscall (bool multithread)
{
pid_t pid = xfork ();
if (pid == 0)
{
if (multithread)
child_mt ();
else
pause ();
_exit (127);
}
check_pid (pid);
}
static int
do_test (void)
{
/* Check for both single and multi thread, since they use different syscall
mechanisms. */
do_test_syscall (false);
do_test_syscall (true);
return 0;
}
#include <support/test-driver.c>
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