svn commit: r253448 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Thu Jul 18 07:43:55 2013
New Revision: 253448
URL: http://svnweb.freebsd.org/changeset/base/253448

Log:
  Added a new mlockall(2) regression test.
  
  Sponsored by:	EMC / Isilon storage division

Added:
  user/pho/stress2/misc/mlockall3.sh   (contents, props changed)

Added: user/pho/stress2/misc/mlockall3.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/mlockall3.sh	Thu Jul 18 07:43:55 2013	(r253448)
@@ -0,0 +1,165 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm <pho at FreeBSD.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# mlockall(2) test scenario.
+# "panic: vm_page_unwire: page xxx's wire count is zero" seen.
+# http://people.freebsd.org/~pho/stress/log/mlockall.txt
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/mlockall3.c
+cc -o mlockall3 -Wall -Wextra mlockall3.c -lpthread || exit 1
+rm -f mlockall3.c
+cd $odir
+
+/tmp/mlockall3
+
+killall mlockall3 > /dev/null 2>&1
+rm -f /tmp/mlockall3
+exit
+
+EOF
+#include <sys/types.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define N (128 * 1024 / (int)sizeof(u_int32_t))
+u_int32_t r[N];
+
+static void
+hand(int i __unused) {	/* handler */
+	_exit(1);
+}
+
+unsigned long
+makearg(void)
+{
+	unsigned int i;
+	unsigned long val;
+
+	val = arc4random();
+	i   = arc4random() % 100;
+	if (i < 20)
+		val = val & 0xff;
+	if (i >= 20 && i < 40)
+		val = val & 0xffff;
+	if (i >= 40 && i < 60)
+		val = (unsigned long)(r) | (val & 0xffff);
+#if defined(__LP64__)
+	if (i >= 60) {
+		val = (val << 32) | arc4random();
+		if (i > 80)
+			val = val & 0x00007fffffffffffUL;
+	}
+#endif
+
+	return(val);
+}
+
+void *
+calls(void *arg __unused)
+{
+	int i;
+	unsigned long arg1, arg2, arg3;
+
+	usleep(1000);
+	for (i = 0; i < 500; i++) {
+		arg1 = makearg();
+		arg2 = makearg();
+		arg3 = makearg();
+
+		alarm(1);
+		syscall(SYS_mlockall, arg1, arg2, arg3);
+	}
+
+	return (0);
+}
+
+int
+main(void)
+{
+	struct passwd *pw;
+	pthread_t cp[50];
+	int i, j;
+
+	if ((pw = getpwnam("nobody")) == NULL)
+		err(1, "no such user: nobody");
+
+	if (setgroups(1, &pw->pw_gid) ||
+	    setegid(pw->pw_gid) || setgid(pw->pw_gid) ||
+	    seteuid(pw->pw_uid) || setuid(pw->pw_uid))
+		err(1, "Can't drop privileges to \"nobody\"");
+	endpwent();
+
+	signal(SIGALRM, hand);
+	signal(SIGILL,  hand);
+	signal(SIGFPE,  hand);
+	signal(SIGSEGV, hand);
+	signal(SIGBUS,  hand);
+	signal(SIGURG,  hand);
+	signal(SIGSYS,  hand);
+	signal(SIGTRAP, hand);
+
+	alarm(180);
+	for (i = 0; i < 8000; i++) {
+		if (fork() == 0) {
+			arc4random_stir();
+			for (j = 0; j < N; j++)
+				r[j] = arc4random();
+			for (j = 0; j < 50; j++) 
+				if (pthread_create(&cp[j], NULL, calls, NULL) != 0)
+					perror("pthread_create");
+
+			for (j = 0; j < 50; j++) 
+				pthread_join(cp[j], NULL);
+			_exit(0);
+		}
+		wait(NULL);
+	}
+
+	return (0);
+}