1 /*-
2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28 /* Call random system calls with random arguments */
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <fcntl.h>
34 #include <sys/stat.h>
35 #include <sys/syscall.h>
36 #include <sys/resource.h>
37 #include <err.h>
38
39 #include "stress.h"
40
41 static char path[128];
42 static int num;
43 static int starting_dir = 0;
44
45 static int ignore[] = {
46 SYS_syscall,
47 SYS_exit,
48 SYS_fork,
49 11, /* 11 is obsolete execv */
50 SYS_unmount,
51 SYS_reboot,
52 SYS_vfork,
53 109, /* 109 is old sigblock */
54 111, /* 111 is old sigsuspend */
55 SYS_shutdown,
56 SYS___syscall,
57 SYS_rfork,
58 SYS_sigsuspend,
59 // SYS_mac_syscall,
60 SYS_sigtimedwait,
61 SYS_sigwaitinfo,
62 };
63
64 int
setup(int nb)65 setup(int nb)
66 {
67 int i;
68 struct rlimit rl;
69
70 umask(0);
71 sprintf(path,"%s.%05d", getprogname(), getpid());
72 (void)mkdir(path, 0770);
73 if (chdir(path) == -1)
74 err(1, "chdir(%s), %s:%d", path, __FILE__, __LINE__);
75 if ((starting_dir = open(".", 0)) < 0)
76 err(1, ".");
77
78 if (op->argc == 1) {
79 num = atoi(op->argv[0]);
80 for (i = 0; i < sizeof(ignore) / sizeof(ignore[0]); i++)
81 if (num == ignore[i]) {
82 printf("syscall %d is marked a no test!\n", num);
83 exit(1);
84 }
85 } else {
86 num = 0;
87 while (num == 0) {
88 num = random_int(0, SYS_MAXSYSCALL);
89 for (i = 0; i < sizeof(ignore) / sizeof(ignore[0]); i++)
90 if (num == ignore[i]) {
91 num = 0;
92 break;
93 }
94 }
95 }
96 if (op->verbose > 1)
97 printf("Testing syscall #%d, pid %d\n", num, getpid());
98
99 /* Multiple parallel core dump may panic the kernel with:
100 panic: kmem_malloc(184320): kmem_map too small: 84426752 total allocated
101 */
102 rl.rlim_max = rl.rlim_cur = 0;
103 if (setrlimit(RLIMIT_CORE, &rl) == -1)
104 warn("setrlimit");
105
106 setproctitle("#%d", num);
107
108 return (0);
109 }
110
111 void
cleanup(void)112 cleanup(void)
113 {
114 if (starting_dir != 0) {
115 if (fchdir(starting_dir) == -1)
116 err(1, "fchdir()");
117 (void)system("find . -type d -exec chmod 777 {} \\;");
118 (void)system("find . -type f -exec chmod 666 {} \\;");
119 (void)system("find . -delete");
120
121 if (chdir("..") == -1)
122 err(1, "chdir(..)");
123 if (rmdir(path) == -1)
124 err(1, "rmdir(%s), %s:%d", path, __FILE__, __LINE__);
125 }
126 starting_dir = 0;
127 }
128
129 int
test(void)130 test(void)
131 {
132 int i;
133 unsigned int arg1, arg2, arg3, arg4, arg5, arg6, arg7;
134
135 for (i = 0; i < 128; i++) {
136 arg1 = arc4random();
137 arg2 = arc4random();
138 arg3 = arc4random();
139 arg4 = arc4random();
140 arg5 = arc4random();
141 arg6 = arc4random();
142 arg7 = arc4random();
143
144 if (op->verbose > 3)
145 printf("%2d : syscall(%3d, %x, %x, %x, %x, %x, %x, %x)\n",
146 i, num, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
147 syscall(num, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
148 }
149 #if 0
150 while (done_testing == 0)
151 sleep(1);
152 #endif
153
154 return (0);
155 }
156