91 lines
1.7 KiB
C
Executable file
91 lines
1.7 KiB
C
Executable file
/*
|
|
* Copyright 2015, Cyril Bur, IBM Corp.
|
|
*
|
|
* 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 test attempts to see if the FPU registers change across a syscall (fork).
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "utils.h"
|
|
|
|
extern int test_fpu(double *darray, pid_t *pid);
|
|
|
|
double darray[] = {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0,
|
|
1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0,
|
|
2.1};
|
|
|
|
int syscall_fpu(void)
|
|
{
|
|
pid_t fork_pid;
|
|
int i;
|
|
int ret;
|
|
int child_ret;
|
|
for (i = 0; i < 1000; i++) {
|
|
/* test_fpu will fork() */
|
|
ret = test_fpu(darray, &fork_pid);
|
|
if (fork_pid == -1)
|
|
return -1;
|
|
if (fork_pid == 0)
|
|
exit(ret);
|
|
waitpid(fork_pid, &child_ret, 0);
|
|
if (ret || child_ret)
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int test_syscall_fpu(void)
|
|
{
|
|
/*
|
|
* Setup an environment with much context switching
|
|
*/
|
|
pid_t pid2;
|
|
pid_t pid = fork();
|
|
int ret;
|
|
int child_ret;
|
|
FAIL_IF(pid == -1);
|
|
|
|
pid2 = fork();
|
|
/* Can't FAIL_IF(pid2 == -1); because already forked once */
|
|
if (pid2 == -1) {
|
|
/*
|
|
* Couldn't fork, ensure test is a fail
|
|
*/
|
|
child_ret = ret = 1;
|
|
} else {
|
|
ret = syscall_fpu();
|
|
if (pid2)
|
|
waitpid(pid2, &child_ret, 0);
|
|
else
|
|
exit(ret);
|
|
}
|
|
|
|
ret |= child_ret;
|
|
|
|
if (pid)
|
|
waitpid(pid, &child_ret, 0);
|
|
else
|
|
exit(ret);
|
|
|
|
FAIL_IF(ret || child_ret);
|
|
return 0;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
return test_harness(test_syscall_fpu, "syscall_fpu");
|
|
|
|
}
|