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/*
* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2003, 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: math.c,v 1.3 2008/12/01 01:11:50 phargrov Exp $
*
* Simple example for using crut
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <string.h>
#include "crut.h"
/* Peform some simple math in callback to ensure used_math() will
* be non-zero when the checkpoint is taken on an i386 or x86_64.
*/
static double dummy = 1.23;
static int math_callback(void *arg)
{
dummy *= (unsigned long)arg;
#if defined(__i386__) || defined(__x86_64__)
{
double r, q = dummy;
__asm__ __volatile__ ("fldl %0" : : "m"(dummy));
(void)cr_checkpoint(CR_CHECKPOINT_READY);
__asm__ __volatile__ ("fstpl %0" : "=m"(r));
if (r != q) {
CRUT_FAIL("FP restore failure %g != %g\n", r, q);
return -1;
}
}
#endif
return 0;
}
static int
math_setup(void **testdata)
{
CRUT_DEBUG("Initializing math.");
*testdata = NULL;
cr_register_callback(math_callback, (void *)(unsigned long)getppid(), CR_SIGNAL_CONTEXT);
cr_register_callback(math_callback, (void *)(unsigned long)getpid(), CR_THREAD_CONTEXT);
return 0;
}
static int
math_precheckpoint(void *p)
{
CRUT_DEBUG("Testing sanity before we checkpoint");
return (dummy > 0.0);
}
static int
math_continue(void *p)
{
CRUT_DEBUG("Continuing after checkpoint.");
return (dummy > 0.0);
}
static int
math_restart(void *p)
{
CRUT_DEBUG("Restarting from checkpoint.");
return (dummy > 0.0);
}
int
main(int argc, char *argv[])
{
int ret;
struct crut_operations math_test_ops = {
test_scope:CR_SCOPE_PROC,
test_name:"math",
test_description:"Simple test using the FPU.",
test_setup:math_setup,
test_precheckpoint:math_precheckpoint,
test_continue:math_continue,
test_restart:math_restart,
test_teardown:NULL,
};
/* add the basic tests */
crut_add_test(&math_test_ops);
ret = crut_main(argc, argv);
return ret;
}
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