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4dd63d48 PA |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
3 | Copyright 2015 Free Software Foundation, Inc. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program 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 | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <assert.h> | |
19 | #include <pthread.h> | |
20 | #include <unistd.h> | |
21 | #include <stdio.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/wait.h> | |
24 | ||
25 | ||
26 | /* Number of times the main process forks. */ | |
27 | #define NFORKS 10 | |
28 | ||
29 | /* Number of threads by each fork child. */ | |
30 | #define NTHREADS 10 | |
31 | ||
32 | static void * | |
33 | thread_func (void *arg) | |
34 | { | |
35 | /* Empty. */ | |
36 | } | |
37 | ||
38 | static void | |
39 | fork_child (void) | |
40 | { | |
41 | pthread_t threads[NTHREADS]; | |
42 | int i; | |
43 | int ret; | |
44 | ||
45 | for (i = 0; i < NTHREADS; i++) | |
46 | { | |
47 | ret = pthread_create (&threads[i], NULL, thread_func, NULL); | |
48 | assert (ret == 0); | |
49 | } | |
50 | ||
51 | for (i = 0; i < NTHREADS; i++) | |
52 | { | |
53 | ret = pthread_join (threads[i], NULL); | |
54 | assert (ret == 0); | |
55 | } | |
56 | } | |
57 | ||
58 | int | |
59 | main (void) | |
60 | { | |
61 | pid_t childs[NFORKS]; | |
62 | int i; | |
63 | int status; | |
64 | int num_exited = 0; | |
65 | ||
66 | /* Don't run forever if the wait loop below gets stuck. */ | |
67 | alarm (180); | |
68 | ||
69 | for (i = 0; i < NFORKS; i++) | |
70 | { | |
71 | pid_t pid; | |
72 | ||
73 | pid = fork (); | |
74 | ||
75 | if (pid > 0) | |
76 | { | |
77 | /* Parent. */ | |
78 | childs[i] = pid; | |
79 | } | |
80 | else if (pid == 0) | |
81 | { | |
82 | /* Child. */ | |
83 | fork_child (); | |
84 | return 0; | |
85 | } | |
86 | else | |
87 | { | |
88 | perror ("fork"); | |
89 | return 1; | |
90 | } | |
91 | } | |
92 | ||
93 | while (num_exited != NFORKS) | |
94 | { | |
95 | pid_t pid = wait (&status); | |
96 | ||
97 | if (pid == -1) | |
98 | { | |
99 | perror ("wait"); | |
100 | return 1; | |
101 | } | |
102 | ||
103 | if (WIFEXITED (status)) | |
104 | { | |
105 | num_exited++; | |
106 | } | |
107 | else | |
108 | { | |
109 | printf ("Hmm, unexpected wait status 0x%x from child %d\n", status, | |
110 | pid); | |
111 | } | |
112 | } | |
113 | ||
114 | return 0; | |
115 | } |