/usr/src/blcr-0.8.5/tests/sigpending.c is in blcr-dkms 0.8.5-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2007, The Regents of the University of California, through Lawrence
* Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*
* Portions may be copyrighted by others, as may be noted in specific
* copyright notices within specific files.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: sigpending.c,v 1.3 2008/08/29 21:36:53 phargrov Exp $
*
* Check for possible loss of pending signals across a restart.
*/
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <sched.h>
#include "crut.h"
#define MY_SIGNAL SIGQUIT
volatile int my_flag = -1;
volatile int my_pid = -1;
static int
common_setup(void **testdata, int flags, void *handler)
{
struct sigaction sa;
sigset_t mask, old_mask;
my_pid = getpid();
sigemptyset(&mask);
sigaddset(&mask, MY_SIGNAL);
sigprocmask(SIG_BLOCK, &mask, &old_mask);
if (flags & SA_SIGINFO) {
sa.sa_handler = handler;
} else {
sa.sa_sigaction = handler;
}
sa.sa_flags = flags;
(void)sigaction(MY_SIGNAL, &sa, NULL); /* Ignore any failure */
*testdata = (void *)(unsigned long)flags;
return 0;
}
static void catcher_raise(int signo) {
CRUT_DEBUG("In catcher");
if ((my_flag != 0) || (signo != MY_SIGNAL)) {
CRUT_FAIL("Catcher ran unexpectedly (sig=%d flag=%d)", signo, my_flag);
exit(-1);
}
my_flag = 1;
return;
}
static int
raise_setup(void **testdata)
{
int result = common_setup(testdata, 0, catcher_raise);
raise(MY_SIGNAL);
return result;
}
static void catcher_sigqueue(int signo, siginfo_t *siginfo, void *context) {
CRUT_DEBUG("In catcher");
if ((my_flag != 0) || (signo != MY_SIGNAL)) {
CRUT_FAIL("Catcher ran unexpectedly (sig=%d flag=%d)", signo, my_flag);
exit(-1);
}
if (siginfo->si_value.sival_int != my_pid) {
CRUT_FAIL("Failed to preserve queued siginfo (%d != %d)",
siginfo->si_value.sival_int, my_pid);
exit(-1);
}
my_flag = 1;
return;
}
static int
sigqueue_setup(void **testdata)
{
int result = common_setup(testdata, SA_SIGINFO, catcher_sigqueue);
union sigval v;
int rc;
v.sival_int = my_pid;
rc = sigqueue(my_pid, MY_SIGNAL, v);
if (rc < 0) {
CRUT_FAIL("sigqueue failed w/ errno=%d", errno);
result = rc;
}
return result;
}
static int
check_it(void *p, int unblock)
{
sigset_t mask, old_mask;
//int flags = (int)(unsigned long)p;
/* Check that signal actually *is* blocked (as opposed to ignored) */
CRUT_DEBUG("Checking signal mask");
sigemptyset(&mask);
sigprocmask(SIG_BLOCK, &mask, &old_mask);
if (sigismember(&old_mask,MY_SIGNAL) == 0) {
CRUT_FAIL("Failed to mask the signal");
return -1;
}
/* Check that signal is (still) pending */
CRUT_DEBUG("Checking pending signals");
sigemptyset(&mask);
sigpending(&mask);
if (sigismember(&mask,MY_SIGNAL) == 0) {
CRUT_FAIL("Failed to preserve the pending signal");
return -1;
}
/* Check on delivery */
if (unblock) {
if (my_flag == 1) {
CRUT_FAIL("Signal handler ran early");
return -1;
}
my_flag = 0;
sched_yield();
CRUT_DEBUG("Unblock signal to test");
sigemptyset(&mask);
sigaddset(&mask, MY_SIGNAL);
sigprocmask(SIG_UNBLOCK, &mask, &old_mask);
sched_yield();
if (my_flag != 1) {
CRUT_FAIL("Signal handler failed or failed to run");
return -1;
}
my_flag = -1;
}
return 0;
}
static int
common_precheckpoint(void *p)
{
CRUT_DEBUG("Testing sanity before we checkpoint");
return check_it(p, 0);
}
static int
common_continue(void *p)
{
CRUT_DEBUG("Continuing after checkpoint.");
return check_it(p, 1);
}
static int
common_restart(void *p)
{
CRUT_DEBUG("Restarting from checkpoint.");
return check_it(p, 1);
}
int
main(int argc, char *argv[])
{
int ret;
struct crut_operations test1_ops = {
test_scope:CR_SCOPE_PROC,
test_name:"raise",
test_description:"Ensure a raised signal is preserved across restart.",
test_setup:raise_setup,
test_precheckpoint:common_precheckpoint,
test_continue:common_continue,
test_restart:common_restart,
test_teardown:NULL,
};
struct crut_operations test2_ops = {
test_scope:CR_SCOPE_PROC,
test_name:"sigqueue",
test_description:"Ensure a queued signal is preserved across restart.",
test_setup:sigqueue_setup,
test_precheckpoint:common_precheckpoint,
test_continue:common_continue,
test_restart:common_restart,
test_teardown:NULL,
};
/* add the tests */
crut_add_test(&test1_ops);
crut_add_test(&test2_ops);
ret = crut_main(argc, argv);
return ret;
}
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