/usr/src/blcr-0.8.5/tests/edeadlk.c is in blcr-dkms 0.8.5-2.1.
This file is owned by root:root, with mode 0o644.
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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: edeadlk.c,v 1.3 2008/07/26 06:38:15 phargrov Exp $
*/
/* Tests implementation of CR_CHKPT_PROHIBIT_SELF flag */
#define _LARGEFILE64_SOURCE 1
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <libcr.h>
#include "crut_util.h"
#ifndef O_LARGEFILE
#define O_LARGEFILE 0
#endif
enum {
MSG_CHILD_READY,
MSG_REGISTER_REQUEST,
MSG_REGISTER_REPLY,
MSG_RESULT_QUERY,
MSG_PARENT_DONE,
BAD_EXIT_VAL,
};
static volatile int cb_result = 0;
static int my_callback(void *arg)
{
struct crut_pipes *pipes = arg;
int rc;
rc = cr_forward_checkpoint(CR_SCOPE_PROC, pipes->parent);
cb_result = (rc < 0) ? errno : rc;
return 0;
}
static void child_main(struct crut_pipes *pipes)
{
cr_callback_id_t cb_id;
cr_client_id_t my_id;
int mypid = getpid();
my_id = cr_init();
if (my_id < 0) {
printf("XXX child %d cr_init() failed, returning %d\n", mypid, my_id);
exit(-1);
}
crut_pipes_putchar(pipes, MSG_CHILD_READY);
crut_pipes_expect(pipes, MSG_REGISTER_REQUEST);
cb_id = cr_register_callback(my_callback, pipes, CR_SIGNAL_CONTEXT);
if (cb_id < 0) {
printf("XXX cr_register_callback() unexpectedly returned %d\n", cb_id);
exit(-1);
}
crut_pipes_putchar(pipes, MSG_REGISTER_REPLY);
while (1) {
crut_pipes_expect(pipes, MSG_RESULT_QUERY);
crut_pipes_putchar(pipes, cb_result);
}
exit (BAD_EXIT_VAL);
}
static int checkpoint_to_file(const char *filename, pid_t target, int flags)
{
int ret;
cr_checkpoint_handle_t cr_handle;
cr_checkpoint_args_t cr_args;
/* open the context file */
ret = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, 0600);
if (ret < 0) {
perror("open");
goto out;
}
cr_initialize_checkpoint_args_t(&cr_args);
cr_args.cr_fd = ret;
cr_args.cr_scope = CR_SCOPE_PROC;
cr_args.cr_flags = flags;
cr_args.cr_target = target;
/* issue the request */
ret = cr_request_checkpoint(&cr_args, &cr_handle);
if (ret < 0) {
ret = errno;
goto out;
}
/* wait for the request to complete */
do {
ret = cr_poll_checkpoint(&cr_handle, NULL);
if (ret < 0) {
if (ret == CR_POLL_CHKPT_ERR_POST && errno == CR_ERESTARTED) {
/* restarting -- not an error */
ret = 0;
} else if (errno == EINTR) {
/* retry */
;
} else {
perror("cr_poll_checkpoint");
goto out;
}
} else if (ret == 0) {
fprintf(stderr, "cr_poll_checkpoint returned unexpected 0\n");
exit(1);
}
} while (ret < 0);
ret = 0;
close(cr_args.cr_fd);
out:
return ret;
}
int main(void) {
int rc, child;
struct crut_pipes pipes;
int self = getpid();
char *filename = crut_aprintf("context.%d", self);
setlinebuf(stdout);
printf("#ST_ALARM:60\n");
printf("000 test started w/ pid %d\n", self);
child = crut_pipes_fork(&pipes);
if (!child) {
child_main(&pipes);
exit(1);
}
crut_pipes_expect(&pipes, MSG_CHILD_READY);
printf("001 child started w/ pid %d\n", child);
/* First basic tests of normal checkpoints */
rc = checkpoint_to_file(filename, self, 0);
if (rc == 0) {
printf("002 basic self checkpoint passed\n");
} else {
printf("XXX basic self checkpoint FAILED errno=%d (%s)\n", rc, cr_strerror(rc));
}
rc = checkpoint_to_file(filename, child, 0);
if (rc == 0) {
printf("003 basic child checkpoint passed\n");
} else {
printf("XXX basic child checkpoint FAILED errno=%d (%s)\n", rc, cr_strerror(rc));
}
/* Next try w/ CR_CHKPT_PROHIBIT_SELF */
rc = checkpoint_to_file(filename, self, CR_CHKPT_PROHIBIT_SELF);
if (rc == EDEADLK) {
printf("004 PROHIBIT_SELF self checkpoint failed in the expected way\n");
} else {
printf("XXX PROHIBIT_SELF self checkpoint did not fail in the expected way, errno=%d (%s)\n", rc, cr_strerror(rc));
}
rc = checkpoint_to_file(filename, child, CR_CHKPT_PROHIBIT_SELF);
if (rc == 0) {
printf("005 PROHIBIT_SELF child checkpoint passed\n");
} else {
printf("XXX PROHIBIT_SELF child checkpoint FAILED errno=%d (%s)\n", rc, cr_strerror(rc));
}
/* Ask child to register a callback that forwards back to us */
crut_pipes_putchar(&pipes, MSG_REGISTER_REQUEST);
crut_pipes_expect(&pipes, MSG_REGISTER_REPLY);
printf("006 child has registered forwarding callback\n");
/* Now try w/ and w/o CR_CHKPT_PROHIBIT_SELF */
rc = checkpoint_to_file(filename, child, 0);
if (rc == 0) {
printf("007 child+fwd checkpoint passed\n");
} else {
printf("XXX child+fwd checkpoint FAILED errno=%d (%s)\n", rc, cr_strerror(rc));
}
crut_pipes_putchar(&pipes, MSG_RESULT_QUERY);
rc = crut_pipes_getchar(&pipes);
if (rc == 0) {
printf("008 child+fwd cr_forward_checkpoint(parent) passed\n");
} else {
printf("XXX child+fwd cr_forward_checkpoint(parent) FAILED errno=%d (mod 128)\n", rc);
}
rc = checkpoint_to_file(filename, child, CR_CHKPT_PROHIBIT_SELF);
if (rc == 0) {
printf("009 PROHIBIT_SELF child+fwd checkpoint passed\n");
} else {
printf("XXX PROHIBIT_SELF child+fwd checkpoint FAILED errno=%d (%s)\n", rc, cr_strerror(rc));
}
crut_pipes_putchar(&pipes, MSG_RESULT_QUERY);
rc = crut_pipes_getchar(&pipes);
if ((char)rc == (char)EDEADLK) {
printf("010 PROHIBIT_SELF child+fwd cr_forward_checkpoint(parent) failed in the expected way\n");
} else {
printf("XXX child+fwd cr_forward_checkpoint(parent) did not fail in the expected way, errno=%d (mod 128)\n", rc);
}
crut_pipes_putchar(&pipes, MSG_PARENT_DONE);
crut_waitpid_expect(pipes.child, MSG_PARENT_DONE);
printf("011 DONE\n");
(void)unlink(filename);
return 0;
}
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