1 /*
2 * Copyright (C) 2010 The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28 #include <stdio.h>
29 #include <unistd.h>
30 #include <errno.h>
31 #include <string.h>
32 #include <sys/wait.h>
33 #include <sys/resource.h>
34
35 /* A very simple program used to test constructor and destructor functions
36 * in executables (instead of shared libraries).
37 */
38
39 int x = 0;
40
41 /* Initialize x to 1 when the program starts. This will be checked
42 * later by the main() function.
43 */
44 static void __attribute__((constructor))
on_load(void)45 on_load(void)
46 {
47 x = 1;
48 }
49
50 /* Crash intentionally if 'x' is set to 1 */
51 static void __attribute__((destructor))
on_exit(void)52 on_exit(void)
53 {
54 if (x == 1)
55 *(int*)(void*)0 = 10; /* force a crash */
56 }
57
main(void)58 int main(void)
59 {
60 int status;
61 pid_t pid;
62
63 /* First, check that the constructor was properly called ! */
64 if (x != 1) {
65 fprintf(stderr, "Constructor function not called!!\n");
66 return 1;
67 }
68
69 /* prevent our crashing child process from generating a core file */
70 {
71 struct rlimit rlim;
72 rlim.rlim_cur = 0;
73 rlim.rlim_max = RLIM_INFINITY;
74 setrlimit(RLIMIT_CORE, &rlim);
75 }
76
77 /* Fork the current process, then wait for the child to exit
78 * and crash.
79 */
80 pid = fork();
81 if (pid < 0) {
82 fprintf(stderr, "Could not fork process: %s\n", strerror(errno));
83 return 2;
84 }
85 /* in the child, simply exit after 1 second. */
86 if (pid == 0) {
87 sleep(1);
88 return 0;
89 }
90 /* in the parent, wait for the child to terminate */
91 if (wait(&status) < 0) {
92 fprintf(stderr, "Could not wait for child: %s\n", strerror(errno));
93 return 3;
94 }
95 if (!WIFSIGNALED(status)) {
96 fprintf(stderr, "Destructor not called!!\n");
97 return 4;
98 }
99
100 /* Prevent crashing */
101 x = 2;
102 printf("ok\n");
103 return 0;
104 }
105