133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/* Smoke test for the tgkill system call.
|
|
Copyright (C) 2019-2022 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 <errno.h>
|
|
#include <signal.h>
|
|
#include <support/check.h>
|
|
#include <support/namespace.h>
|
|
#include <support/xthread.h>
|
|
#include <unistd.h>
|
|
|
|
/* Number of times sigusr1_handler has been invoked. */
|
|
static volatile sig_atomic_t signals_delivered;
|
|
|
|
/* Expected TID of the thread receiving the signal. */
|
|
static pid_t expected_signal_tid;
|
|
|
|
static void
|
|
sigusr1_handler (int signo)
|
|
{
|
|
TEST_COMPARE (expected_signal_tid, gettid ());
|
|
++signals_delivered;
|
|
}
|
|
|
|
struct pid_and_tid
|
|
{
|
|
pid_t pid;
|
|
pid_t tid;
|
|
};
|
|
|
|
/* Send signals from the subprocess which are not expected to be
|
|
delivered. There is no handler for SIGUSR2, so delivery will
|
|
result in a test failure. CLOSURE must point to a valid PID/TID
|
|
combination that is still running. */
|
|
static void
|
|
subprocess_no_tid_match (void *closure)
|
|
{
|
|
struct pid_and_tid *ids = closure;
|
|
TEST_COMPARE (tgkill (ids->pid, gettid (), SIGUSR2), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
|
|
TEST_COMPARE (tgkill (getpid (), ids->tid, SIGUSR2), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
|
|
TEST_COMPARE (tgkill (getppid (), gettid (), SIGUSR2), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
}
|
|
|
|
/* Called from threadfunc below. */
|
|
static void
|
|
subprocess (void *closure)
|
|
{
|
|
int original_tid = expected_signal_tid;
|
|
|
|
/* Do not expect that the folloing signals are delivered to the
|
|
subprocess. The parent process retains the original
|
|
expected_signal_tid value. */
|
|
expected_signal_tid = 0;
|
|
TEST_COMPARE (tgkill (getpid (), original_tid, SIGUSR1), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
TEST_COMPARE (tgkill (getppid (), gettid (), SIGUSR1), -1);
|
|
TEST_COMPARE (errno, ESRCH);
|
|
TEST_COMPARE (expected_signal_tid, 0);
|
|
|
|
/* This call has the correct PID/TID combination and is therefore
|
|
expected to suceed. */
|
|
TEST_COMPARE (tgkill (getppid (), original_tid, SIGUSR1), 0);
|
|
}
|
|
|
|
static void *
|
|
threadfunc (void *closure)
|
|
{
|
|
TEST_VERIFY (gettid () != getpid ());
|
|
expected_signal_tid = gettid ();
|
|
TEST_COMPARE (tgkill (getpid (), gettid (), SIGUSR1), 0);
|
|
TEST_COMPARE (signals_delivered, 1);
|
|
signals_delivered = 0;
|
|
|
|
support_isolate_in_subprocess (subprocess, NULL);
|
|
|
|
/* Check that exactly one signal arrived from the subprocess. */
|
|
TEST_COMPARE (signals_delivered, 1);
|
|
|
|
support_isolate_in_subprocess (subprocess_no_tid_match,
|
|
&(struct pid_and_tid)
|
|
{
|
|
.pid = getpid (),
|
|
.tid = gettid (),
|
|
});
|
|
|
|
support_isolate_in_subprocess (subprocess_no_tid_match,
|
|
&(struct pid_and_tid)
|
|
{
|
|
.pid = getpid (),
|
|
.tid = getpid (),
|
|
});
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
TEST_VERIFY_EXIT (signal (SIGUSR1, sigusr1_handler) != SIG_ERR);
|
|
|
|
expected_signal_tid = gettid ();
|
|
TEST_COMPARE (gettid (), getpid ());
|
|
TEST_COMPARE (tgkill (getpid (), gettid (), SIGUSR1), 0);
|
|
TEST_COMPARE (signals_delivered, 1);
|
|
signals_delivered = 0;
|
|
|
|
xpthread_join (xpthread_create (NULL, threadfunc, NULL));
|
|
|
|
TEST_VERIFY (signal (SIGUSR1, SIG_DFL) == sigusr1_handler);
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|