1 /* Test that loading libpthread does not break ld.so exceptions (bug 16628).
2 Copyright (C) 2016-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <dlfcn.h>
20 #include <signal.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <sys/wait.h>
24 #include <unistd.h>
25
26 static int
do_test(void)27 do_test (void)
28 {
29 void *handle = dlopen ("tst-latepthreadmod.so", RTLD_LOCAL | RTLD_LAZY);
30 if (handle == NULL)
31 {
32 printf ("error: dlopen failed: %s\n", dlerror ());
33 return 1;
34 }
35 void *ptr = dlsym (handle, "trigger_dynlink_failure");
36 if (ptr == NULL)
37 {
38 printf ("error: dlsym failed: %s\n", dlerror ());
39 return 1;
40 }
41 int (*func) (void) = ptr;
42
43 /* Run the actual test in a subprocess, to capture the error. */
44 int fds[2];
45 if (pipe (fds) < 0)
46 {
47 printf ("error: pipe: %m\n");
48 return 1;
49 }
50 pid_t pid = fork ();
51 if (pid < 0)
52 {
53 printf ("error: fork: %m\n");
54 return 1;
55 }
56 else if (pid == 0)
57 {
58 if (dup2 (fds[1], STDERR_FILENO) < 0)
59 _exit (2);
60 /* Trigger an abort. */
61 func ();
62 _exit (3);
63 }
64 /* NB: This assumes that the abort message is so short that the pipe
65 does not block. */
66 int status;
67 if (waitpid (pid, &status, 0) < 0)
68 {
69 printf ("error: waitpid: %m\n");
70 return 1;
71 }
72
73 /* Check the printed error message. */
74 if (close (fds[1]) < 0)
75 {
76 printf ("error: close: %m\n");
77 return 1;
78 }
79 char buf[512];
80 /* Leave room for the NUL terminator. */
81 ssize_t ret = read (fds[0], buf, sizeof (buf) - 1);
82 if (ret < 0)
83 {
84 printf ("error: read: %m\n");
85 return 1;
86 }
87 if (ret > 0 && buf[ret - 1] == '\n')
88 --ret;
89 buf[ret] = '\0';
90 printf ("info: exit status: %d, message: %s\n", status, buf);
91 if (strstr (buf, "undefined symbol: this_function_is_not_defined") == NULL)
92 {
93 printf ("error: message does not contain expected string\n");
94 return 1;
95 }
96 if (!WIFEXITED (status) || WEXITSTATUS (status) != 127)
97 {
98 printf ("error: unexpected process exit status\n");
99 return 1;
100 }
101 return 0;
102 }
103
104 #include <support/test-driver.c>
105