svn commit: r322809 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Wed Aug 23 11:52:02 2017
New Revision: 322809
URL: https://svnweb.freebsd.org/changeset/base/322809

Log:
  Added a regression test.
  
  Sponsored by:	Dell EMC Isilon

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

Added: user/pho/stress2/misc/fsgs.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/fsgs.sh	Wed Aug 23 11:52:02 2017	(r322809)
@@ -0,0 +1,135 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2017 Dell EMC Isilon
+# 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.
+#
+# $FreeBSD$
+#
+
+# Regression test for r322799:
+# Ensure that fs/gs bases are stored in pcb before copying the pcb for
+# new process or thread.
+
+# "Exit status is 139" seen.
+
+# Test scenario suggestion by kib@
+
+. ../default.cfg
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/fsgs.c
+mycc -o fsgs -Wall -Wextra -O0 -g fsgs.c || exit 1
+rm -f fsgs.c
+cd $odir
+
+/tmp/fsgs
+s=$?
+
+rm -rf /tmp/fsgs
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#define PARALLEL 4
+#define RUNTIME (1 * 60)
+#define SYNC 0
+
+static void
+test(void)
+{
+	pid_t pid;
+	int i, status;
+	volatile char *cp;
+
+	atomic_add_int(&share[SYNC], 1);
+	while (share[SYNC] != PARALLEL)
+		;
+
+	for (i = 0; i < 100; i++) {
+		if ((pid = fork()) == 0) {
+			cp = malloc(2);
+			_exit(0);
+		}
+		if (waitpid(pid, &status, 0) != pid)
+			err(1, "waitpid(%d)", pid);
+		if (status != 0) {
+			fprintf(stderr, "Exit status is %d\n", status);
+			exit(1);
+		}
+	}
+
+	_exit(0);
+}
+
+int
+main(void)
+{
+	pid_t pids[PARALLEL];
+	size_t len;
+	time_t start;
+	int e, i, status;
+
+	e = 0;
+	len = PAGE_SIZE;
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	start = time(NULL);
+	while ((time(NULL) - start) < RUNTIME && e == 0) {
+		share[SYNC] = 0;
+		for (i = 0; i < PARALLEL; i++) {
+			if ((pids[i] = fork()) == 0)
+				test();
+			if (pids[i] == -1)
+				err(1, "fork()");
+		}
+		for (i = 0; i < PARALLEL; i++) {
+			if (waitpid(pids[i], &status, 0) == -1)
+				err(1, "waitpid(%d)", pids[i]);
+			e += status == 0 ? 0 : 1;
+		}
+	}
+
+	return (e);
+}