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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <http://www.gnu.org/licenses/>. */
18
19#include <dlfcn.h>
20#include <errno.h>
21#include <mcheck.h>
22#include <pthread.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <unistd.h>
26#include <sys/wait.h>
27
28
29/* Must be exported. */
30int val;
31
32static void
33prepare (void)
34{
35 val *= 2;
36}
37
38static void
39parent (void)
40{
41 val += 4;
42}
43
44static void
45child (void)
46{
47 val += 8;
48}
49
50
51static int
52do_test (void)
53{
54 mtrace ();
55
56 if (pthread_atfork (prepare, parent, child) != 0)
57 {
58 puts ("do_test: atfork failed");
59 exit (1);
60 }
61
62 void *h = dlopen ("tst-atfork2mod.so", RTLD_LAZY);
63 if (h == NULL)
64 {
65 printf ("dlopen failed: %s\n", dlerror ());
66 exit (1);
67 }
68
69 /* First trial of fork. */
70 pid_t pid = fork ();
71 if (pid == -1)
72 {
73 puts ("1st fork failed");
74 exit (1);
75 }
76
77 if (pid == 0)
78 {
79 /* Child. */
80 if (val != 80)
81 {
82 printf ("1st: expected val=%d, got %d\n", 80, val);
83 exit (2);
84 }
85
86 exit (0);
87 }
88
89 /* Parent. */
90 if (val != 24)
91 {
92 printf ("1st: expected val=%d, got %d\n", 24, val);
93 exit (1);
94 }
95
96 int status;
97 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
98 {
99 puts ("1st waitpid failed");
100 exit (1);
101 }
102
103 if (status != 0)
104 exit (status);
105
106 puts ("unloading now");
107
108 /* Unload the module. */
109 if (dlclose (h) != 0)
110 {
111 puts ("dlclose failed");
112 exit (1);
113 }
114
115 puts ("2nd fork");
116
117 /* Second fork trial. */
118 val = 1;
119 pid = fork ();
120 if (pid == -1)
121 {
122 puts ("2nd fork failed");
123 exit (1);
124 }
125
126 if (pid == 0)
127 {
128 /* Child. */
129 if (val != 10)
130 {
131 printf ("2nd: expected val=%d, got %d\n", 10, val);
132 exit (3);
133 }
134
135 exit (0);
136 }
137
138 /* Parent. */
139 if (val != 6)
140 {
141 printf ("2nd: expected val=%d, got %d\n", 6, val);
142 exit (1);
143 }
144
145 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
146 {
147 puts ("2nd waitpid failed");
148 exit (1);
149 }
150
151 if (status != 0)
152 exit (status);
153
154 return 0;
155}
156
157#define TEST_FUNCTION do_test ()
158#include "../test-skeleton.c"
159

Warning: That file was not part of the compilation database. It may have many parsing errors.