2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
1.5 KiB
C
87 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2015, Cyril Bur, IBM Corp.
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*
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* This test attempts to see if the FPU registers change across a syscall (fork).
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include "utils.h"
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extern int test_fpu(double *darray, pid_t *pid);
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double darray[] = {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0,
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1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0,
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2.1};
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int syscall_fpu(void)
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{
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pid_t fork_pid;
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int i;
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int ret;
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int child_ret;
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for (i = 0; i < 1000; i++) {
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/* test_fpu will fork() */
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ret = test_fpu(darray, &fork_pid);
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if (fork_pid == -1)
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return -1;
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if (fork_pid == 0)
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exit(ret);
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waitpid(fork_pid, &child_ret, 0);
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if (ret || child_ret)
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return 1;
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}
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return 0;
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}
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int test_syscall_fpu(void)
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{
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/*
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* Setup an environment with much context switching
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*/
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pid_t pid2;
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pid_t pid = fork();
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int ret;
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int child_ret;
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FAIL_IF(pid == -1);
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pid2 = fork();
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/* Can't FAIL_IF(pid2 == -1); because already forked once */
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if (pid2 == -1) {
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/*
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* Couldn't fork, ensure test is a fail
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*/
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child_ret = ret = 1;
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} else {
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ret = syscall_fpu();
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if (pid2)
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waitpid(pid2, &child_ret, 0);
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else
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exit(ret);
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}
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ret |= child_ret;
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if (pid)
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waitpid(pid, &child_ret, 0);
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else
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exit(ret);
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FAIL_IF(ret || child_ret);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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return test_harness(test_syscall_fpu, "syscall_fpu");
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}
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