Commit | Line | Data |
---|---|---|
85d4a676 SS |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
e2882c85 | 3 | Copyright 2011-2018 Free Software Foundation, Inc. |
85d4a676 SS |
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 <sys/shm.h> | |
19 | #include <sys/sem.h> | |
20 | #include <sys/msg.h> | |
21 | #include <stdio.h> | |
22 | #include <pthread.h> | |
23 | #include <arpa/inet.h> | |
24 | #include <sys/socket.h> | |
a59add0c | 25 | #include <unistd.h> |
e5b85ead | 26 | #include <stdlib.h> |
85d4a676 SS |
27 | |
28 | static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; | |
29 | ||
b9394193 DB |
30 | /* System V IPC identifiers. */ |
31 | static int shmid = -1, semid = -1, msqid = -1; | |
32 | ||
33 | /* Delete any System V IPC resources that were allocated. */ | |
34 | ||
35 | static void | |
36 | ipc_cleanup (void) | |
37 | { | |
38 | if (shmid >= 0) | |
39 | shmctl (shmid, IPC_RMID, NULL); | |
40 | if (semid >= 0) | |
41 | semctl (semid, 0, IPC_RMID, NULL); | |
42 | if (msqid >= 0) | |
43 | msgctl (msqid, IPC_RMID, NULL); | |
44 | } | |
45 | ||
85d4a676 SS |
46 | void * |
47 | thread_proc (void *args) | |
48 | { | |
49 | pthread_mutex_lock (&mutex); | |
50 | pthread_mutex_unlock (&mutex); | |
51 | } | |
52 | ||
53 | int | |
54 | main (void) | |
55 | { | |
56 | const int flags = IPC_CREAT | 0666; | |
855ba978 | 57 | key_t shmkey = 3925, semkey = 7428, msgkey = 5294; |
85d4a676 SS |
58 | FILE *fd; |
59 | pthread_t thread; | |
60 | struct sockaddr_in sock_addr; | |
61 | int sock; | |
62 | unsigned short port; | |
63 | socklen_t size; | |
855ba978 | 64 | int status, try, retries = 1000; |
85d4a676 | 65 | |
b9394193 DB |
66 | atexit (ipc_cleanup); |
67 | ||
855ba978 | 68 | for (try = 0; try < retries; ++try) |
85d4a676 | 69 | { |
855ba978 SS |
70 | shmid = shmget (shmkey, 4096, flags | IPC_EXCL); |
71 | if (shmid >= 0) | |
72 | break; | |
73 | ||
74 | ++shmkey; | |
75 | } | |
76 | ||
77 | if (shmid < 0) | |
78 | { | |
79 | printf ("Cannot create shared-memory region after %d tries.\n", retries); | |
80 | return 1; | |
81 | } | |
82 | ||
83 | for (try = 0; try < retries; ++try) | |
84 | { | |
85 | semid = semget (semkey, 1, flags | IPC_EXCL); | |
86 | if (semid >= 0) | |
87 | break; | |
88 | ||
89 | ++semkey; | |
90 | } | |
91 | ||
92 | if (semid < 0) | |
93 | { | |
94 | printf ("Cannot create semaphore after %d tries.\n", retries); | |
95 | return 1; | |
96 | } | |
97 | ||
98 | for (try = 0; try < retries; ++try) | |
99 | { | |
100 | msqid = msgget (msgkey, flags | IPC_EXCL); | |
101 | if (msqid >= 0) | |
102 | break; | |
103 | ||
104 | ++msgkey; | |
105 | } | |
106 | ||
107 | if (msqid < 0) | |
108 | { | |
109 | printf ("Cannot create message queue after %d tries.\n", retries); | |
110 | return 1; | |
85d4a676 SS |
111 | } |
112 | ||
85d4a676 SS |
113 | fd = fopen ("/dev/null", "r"); |
114 | ||
115 | /* Lock the mutex to prevent the new thread from finishing immediately. */ | |
116 | pthread_mutex_lock (&mutex); | |
117 | pthread_create (&thread, NULL, thread_proc, 0); | |
118 | ||
119 | sock = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP); | |
120 | if (sock < 0) | |
121 | { | |
122 | printf ("Cannot create socket.\n"); | |
123 | return 1; | |
124 | } | |
125 | ||
126 | sock_addr.sin_family = AF_INET; | |
127 | sock_addr.sin_port = 0; /* Bind to a free port. */ | |
128 | sock_addr.sin_addr.s_addr = htonl (INADDR_ANY); | |
129 | ||
130 | status = bind (sock, (struct sockaddr *) &sock_addr, sizeof (sock_addr)); | |
131 | if (status < 0) | |
132 | { | |
133 | printf ("Cannot bind socket.\n"); | |
134 | return 1; | |
135 | } | |
136 | ||
137 | /* Find the assigned port number of the socket. */ | |
138 | size = sizeof (sock_addr); | |
139 | status = getsockname (sock, (struct sockaddr *) &sock_addr, &size); | |
140 | if (status < 0) | |
141 | { | |
142 | printf ("Cannot find name of socket.\n"); | |
143 | return 1; | |
144 | } | |
145 | port = ntohs (sock_addr.sin_port); | |
146 | ||
147 | status = listen (sock, 1); | |
148 | if (status < 0) | |
149 | { | |
150 | printf ("Cannot listen on socket.\n"); | |
151 | return 1; | |
152 | } | |
153 | ||
154 | /* Set breakpoint here. */ | |
155 | ||
85d4a676 SS |
156 | fclose (fd); |
157 | close (sock); | |
158 | ||
159 | pthread_mutex_unlock (&mutex); | |
160 | pthread_join (thread, NULL); | |
161 | ||
162 | return 0; | |
163 | } |