/*
 * Copyright 2013, Michael Ellerman, IBM Corp.
 * Licensed under GPLv2.
 */

#include <errno.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <elf.h>
#include <fcntl.h>
#include <link.h>
#include <sys/stat.h>

#include "subunit.h"
#include "utils.h"

#define KILL_TIMEOUT	5

static uint64_t timeout = 120;

int run_test(int (test_function)(void), char *name)
{
	bool terminated;
	int rc, status;
	pid_t pid;

	/* Make sure output is flushed before forking */
	fflush(stdout);

	pid = fork();
	if (pid == 0) {
		setpgid(0, 0);
		exit(test_function());
	} else if (pid == -1) {
		perror("fork");
		return 1;
	}

	setpgid(pid, pid);

	/* Wake us up in timeout seconds */
	alarm(timeout);
	terminated = false;

wait:
	rc = waitpid(pid, &status, 0);
	if (rc == -1) {
		if (errno != EINTR) {
			printf("unknown error from waitpid\n");
			return 1;
		}

		if (terminated) {
			printf("!! force killing %s\n", name);
			kill(-pid, SIGKILL);
			return 1;
		} else {
			printf("!! killing %s\n", name);
			kill(-pid, SIGTERM);
			terminated = true;
			alarm(KILL_TIMEOUT);
			goto wait;
		}
	}

	/* Kill anything else in the process group that is still running */
	kill(-pid, SIGTERM);

	if (WIFEXITED(status))
		status = WEXITSTATUS(status);
	else {
		if (WIFSIGNALED(status))
			printf("!! child died by signal %d\n", WTERMSIG(status));
		else
			printf("!! child died by unknown cause\n");

		status = 1; /* Signal or other */
	}

	return status;
}

static void alarm_handler(int signum)
{
	/* Jut wake us up from waitpid */
}

static struct sigaction alarm_action = {
	.sa_handler = alarm_handler,
};

void test_harness_set_timeout(uint64_t time)
{
	timeout = time;
}

int test_harness(int (test_function)(void), char *name)
{
	int rc;

	test_start(name);
	test_set_git_version(GIT_VERSION);

	if (sigaction(SIGALRM, &alarm_action, NULL)) {
		perror("sigaction");
		test_error(name);
		return 1;
	}

	rc = run_test(test_function, name);

	if (rc == MAGIC_SKIP_RETURN_VALUE)
		test_skip(name);
	else
		test_finish(name, rc);

	return rc;
}
rf-buildid-cache.txt?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/tools/perf/Documentation/perf-buildid-cache.txt'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>tools</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools/perf?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>perf</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools/perf/Documentation?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/log/tools/perf/Documentation/perf-buildid-cache.txt?id=566cf877a1fcb6d6dc0126b076aad062054c2637'>perf-buildid-cache.txt</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/tools/perf/Documentation/perf-buildid-cache.txt?id=566cf877a1fcb6d6dc0126b076aad062054c2637&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
text:</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>Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;</td><td class='right'>2017-01-12 17:15:56 +0100</td></tr>
<tr><th>committer</th><td>Daniel Vetter &lt;daniel.vetter@ffwll.ch&gt;</td><td class='right'>2017-01-30 10:17:32 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/arch/x86/util/header.c?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/arch/x86/util/header.c?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/arch/x86/util/header.c?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>tools/perf/arch/x86/util/header.c</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/util/header.c?id=4e5b54f127426c82dc2816340c26d951a5bb3429'>4e5b54f127426c82dc2816340c26d951a5bb3429</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/arch/x86/util/header.c?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0&amp;id2=4e5b54f127426c82dc2816340c26d951a5bb3429'>diff</a>)</td></tr></table>
<div class='commit-subject'>drm: Don't race connector registration</div><div class='commit-msg'>I was under the misconception that the sysfs dev stuff can be fully
set up, and then registered all in one step with device_add. That's
true for properties and property groups, but not for parents and child
devices. Those must be fully registered before you can register a
child.

Add a bit of tracking to make sure that asynchronous mst connector
hotplugging gets this right. For consistency we rely upon the implicit
barriers of the connector-&gt;mutex, which is taken anyway, to ensure
that at least either the connector or device registration call will
work out.

Mildly tested since I can't reliably reproduce this on my mst box
here.

Reported-by: Dave Hansen &lt;dave.hansen@intel.com&gt;
Cc: Dave Hansen &lt;dave.hansen@intel.com&gt;
Acked-by: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Cc: Chris Wilson &lt;chris@chris-wilson.co.uk&gt;
Signed-off-by: Daniel Vetter &lt;daniel.vetter@intel.com&gt;
Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=e6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0'>Diffstat</a> (limited to 'tools/perf/arch/x86/util/header.c')</div><table summary='diffstat' class='diffstat'>