/*
 * 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");

}
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>arch</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>x86</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/tests?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>tests</a>/<a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>gen-insn-x86-dat.awk</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='2e4333c14de06a333783d6812cf3c4998f78b0c8'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 10:17:39 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 10:17:39 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>2e4333c14de06a333783d6812cf3c4998f78b0c8</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>patch</a>)</td></tr>
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<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=045169816b31b10faed984b01c390db1b32ee4c1'>045169816b31b10faed984b01c390db1b32ee4c1</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=2e4333c14de06a333783d6812cf3c4998f78b0c8&amp;id2=045169816b31b10faed984b01c390db1b32ee4c1'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=ba735155b9647b6167fd50276ca0fbfbce4e836c'>ba735155b9647b6167fd50276ca0fbfbce4e836c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/arch/x86/tests/gen-insn-x86-dat.awk?id=2e4333c14de06a333783d6812cf3c4998f78b0c8&amp;id2=ba735155b9647b6167fd50276ca0fbfbce4e836c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus</div><div class='commit-msg'>Pull MIPS fixes from Ralf Baechle:
 "Two more MIPS fixes for 4.9:

   - RTC: Return -ENODEV so an external RTC will be tried

   - Fix mask of GPE frequency

  These two have been tested on Imagination's automated test system and
  also both received positive reviews on the linux-mips mailing list"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: Lantiq: Fix mask of GPE frequency
  MIPS: Return -ENODEV from weak implementation of rtc_mips_set_time
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>Diffstat</a> (limited to 'tools/perf/arch/x86/tests/gen-insn-x86-dat.awk')</div><table summary='diffstat' class='diffstat'>