mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
261 lines
6.2 KiB
C
261 lines
6.2 KiB
C
/* Restartable Sequences NPTL test.
|
|
Copyright (C) 2021-2023 Free Software Foundation, Inc.
|
|
|
|
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/>. */
|
|
|
|
/* These tests validate that rseq is registered from various execution
|
|
contexts (main thread, destructor, other threads, other threads created
|
|
from destructor, forked process (without exec), pthread_atfork handlers,
|
|
pthread setspecific destructors, signal handlers, atexit handlers).
|
|
|
|
See the Linux kernel selftests for extensive rseq stress-tests. */
|
|
|
|
#include <stdio.h>
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
#include <sys/rseq.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef RSEQ_SIG
|
|
# include <array_length.h>
|
|
# include <errno.h>
|
|
# include <error.h>
|
|
# include <pthread.h>
|
|
# include <signal.h>
|
|
# include <stdlib.h>
|
|
# include <string.h>
|
|
# include <support/namespace.h>
|
|
# include <support/xsignal.h>
|
|
# include <syscall.h>
|
|
# include <sys/types.h>
|
|
# include <sys/wait.h>
|
|
# include "tst-rseq.h"
|
|
|
|
static pthread_key_t rseq_test_key;
|
|
|
|
static void
|
|
atfork_prepare (void)
|
|
{
|
|
if (!rseq_thread_registered ())
|
|
{
|
|
printf ("error: rseq not registered in pthread atfork prepare\n");
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
atfork_parent (void)
|
|
{
|
|
if (!rseq_thread_registered ())
|
|
{
|
|
printf ("error: rseq not registered in pthread atfork parent\n");
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
atfork_child (void)
|
|
{
|
|
if (!rseq_thread_registered ())
|
|
{
|
|
printf ("error: rseq not registered in pthread atfork child\n");
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
rseq_key_destructor (void *arg)
|
|
{
|
|
/* Cannot use deferred failure reporting after main returns. */
|
|
if (!rseq_thread_registered ())
|
|
FAIL_EXIT1 ("rseq not registered in pthread key destructor");
|
|
}
|
|
|
|
static void
|
|
atexit_handler (void)
|
|
{
|
|
/* Cannot use deferred failure reporting after main returns. */
|
|
if (!rseq_thread_registered ())
|
|
FAIL_EXIT1 ("rseq not registered in atexit handler");
|
|
}
|
|
|
|
/* Used to avoid -Werror=stringop-overread warning with
|
|
pthread_setspecific and GCC 11. */
|
|
static char one = 1;
|
|
|
|
static void
|
|
do_rseq_main_test (void)
|
|
{
|
|
TEST_COMPARE (atexit (atexit_handler), 0);
|
|
rseq_test_key = xpthread_key_create (rseq_key_destructor);
|
|
TEST_COMPARE (pthread_atfork (atfork_prepare, atfork_parent, atfork_child), 0);
|
|
xraise (SIGUSR1);
|
|
TEST_COMPARE (pthread_setspecific (rseq_test_key, &one), 0);
|
|
TEST_VERIFY_EXIT (rseq_thread_registered ());
|
|
}
|
|
|
|
static void
|
|
cancel_routine (void *arg)
|
|
{
|
|
if (!rseq_thread_registered ())
|
|
{
|
|
printf ("error: rseq not registered in cancel routine\n");
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static pthread_barrier_t cancel_thread_barrier;
|
|
static pthread_cond_t cancel_thread_cond = PTHREAD_COND_INITIALIZER;
|
|
static pthread_mutex_t cancel_thread_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
static void
|
|
test_cancel_thread (void)
|
|
{
|
|
pthread_cleanup_push (cancel_routine, NULL);
|
|
(void) xpthread_barrier_wait (&cancel_thread_barrier);
|
|
/* Wait forever until cancellation. */
|
|
xpthread_cond_wait (&cancel_thread_cond, &cancel_thread_mutex);
|
|
pthread_cleanup_pop (0);
|
|
}
|
|
|
|
static void *
|
|
thread_function (void * arg)
|
|
{
|
|
int i = (int) (intptr_t) arg;
|
|
|
|
xraise (SIGUSR1);
|
|
if (i == 0)
|
|
test_cancel_thread ();
|
|
TEST_COMPARE (pthread_setspecific (rseq_test_key, &one), 0);
|
|
return rseq_thread_registered () ? NULL : (void *) 1l;
|
|
}
|
|
|
|
static void
|
|
sighandler (int sig)
|
|
{
|
|
if (!rseq_thread_registered ())
|
|
{
|
|
printf ("error: rseq not registered in signal handler\n");
|
|
support_record_failure ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
setup_signals (void)
|
|
{
|
|
struct sigaction sa;
|
|
|
|
sigemptyset (&sa.sa_mask);
|
|
sigaddset (&sa.sa_mask, SIGUSR1);
|
|
sa.sa_flags = 0;
|
|
sa.sa_handler = sighandler;
|
|
xsigaction (SIGUSR1, &sa, NULL);
|
|
}
|
|
|
|
static int
|
|
do_rseq_threads_test (int nr_threads)
|
|
{
|
|
pthread_t th[nr_threads];
|
|
int i;
|
|
int result = 0;
|
|
|
|
xpthread_barrier_init (&cancel_thread_barrier, NULL, 2);
|
|
|
|
for (i = 0; i < nr_threads; ++i)
|
|
th[i] = xpthread_create (NULL, thread_function,
|
|
(void *) (intptr_t) i);
|
|
|
|
(void) xpthread_barrier_wait (&cancel_thread_barrier);
|
|
|
|
xpthread_cancel (th[0]);
|
|
|
|
for (i = 0; i < nr_threads; ++i)
|
|
{
|
|
void *v;
|
|
|
|
v = xpthread_join (th[i]);
|
|
if (i != 0 && v != NULL)
|
|
{
|
|
printf ("error: join %d successful, but child failed\n", i);
|
|
result = 1;
|
|
}
|
|
else if (i == 0 && v == NULL)
|
|
{
|
|
printf ("error: join %d successful, child did not fail as expected\n", i);
|
|
result = 1;
|
|
}
|
|
}
|
|
|
|
xpthread_barrier_destroy (&cancel_thread_barrier);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
subprocess_callback (void *closure)
|
|
{
|
|
do_rseq_main_test ();
|
|
}
|
|
|
|
static void
|
|
do_rseq_fork_test (void)
|
|
{
|
|
support_isolate_in_subprocess (subprocess_callback, NULL);
|
|
}
|
|
|
|
static int
|
|
do_rseq_test (void)
|
|
{
|
|
int t[] = { 1, 2, 6, 5, 4, 3, 50 };
|
|
int i, result = 0;
|
|
|
|
if (!rseq_available ())
|
|
FAIL_UNSUPPORTED ("kernel does not support rseq, skipping test");
|
|
setup_signals ();
|
|
xraise (SIGUSR1);
|
|
do_rseq_main_test ();
|
|
for (i = 0; i < array_length (t); i++)
|
|
if (do_rseq_threads_test (t[i]))
|
|
result = 1;
|
|
do_rseq_fork_test ();
|
|
return result;
|
|
}
|
|
|
|
static void __attribute__ ((destructor))
|
|
do_rseq_destructor_test (void)
|
|
{
|
|
/* Cannot use deferred failure reporting after main returns. */
|
|
if (do_rseq_test ())
|
|
FAIL_EXIT1 ("rseq not registered within destructor");
|
|
xpthread_key_delete (rseq_test_key);
|
|
}
|
|
|
|
#else /* RSEQ_SIG */
|
|
static int
|
|
do_rseq_test (void)
|
|
{
|
|
FAIL_UNSUPPORTED ("glibc does not define RSEQ_SIG, skipping test");
|
|
return 0;
|
|
}
|
|
#endif /* RSEQ_SIG */
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
return do_rseq_test ();
|
|
}
|
|
|
|
#include <support/test-driver.c>
|