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863d01bd PA |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
618f726f | 3 | Copyright 2015-2016 Free Software Foundation, Inc. |
863d01bd PA |
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 | #include <stdlib.h> | |
7868401b | 25 | #include <errno.h> |
863d01bd PA |
26 | |
27 | /* Number of threads. Each thread continuously spawns a fork and wait | |
28 | for it. If we have another thread continuously start a step over, | |
29 | gdbserver should end up finding new forks while suspending | |
30 | threads. */ | |
31 | #define NTHREADS 10 | |
32 | ||
33 | pthread_t threads[NTHREADS]; | |
34 | ||
35 | pthread_barrier_t barrier; | |
36 | ||
f6a9d9c7 | 37 | #define NFORKS 10 |
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38 | |
39 | /* Used to create a conditional breakpoint that always fails. */ | |
40 | volatile int zero; | |
41 | ||
42 | static void * | |
43 | thread_forks (void *arg) | |
44 | { | |
45 | int i; | |
46 | ||
47 | pthread_barrier_wait (&barrier); | |
48 | ||
49 | for (i = 0; i < NFORKS; i++) | |
50 | { | |
51 | pid_t pid; | |
52 | ||
7868401b DB |
53 | do |
54 | { | |
55 | pid = fork (); | |
56 | } | |
57 | while (pid == -1 && errno == EINTR); | |
863d01bd PA |
58 | |
59 | if (pid > 0) | |
60 | { | |
61 | int status; | |
62 | ||
63 | /* Parent. */ | |
7868401b DB |
64 | do |
65 | { | |
66 | pid = waitpid (pid, &status, 0); | |
67 | } | |
68 | while (pid == -1 && errno == EINTR); | |
69 | ||
863d01bd PA |
70 | if (pid == -1) |
71 | { | |
72 | perror ("wait"); | |
73 | exit (1); | |
74 | } | |
75 | ||
76 | if (!WIFEXITED (status)) | |
77 | { | |
78 | printf ("Unexpected wait status 0x%x from child %d\n", | |
79 | status, pid); | |
80 | } | |
81 | } | |
82 | else if (pid == 0) | |
83 | { | |
84 | /* Child. */ | |
85 | exit (0); | |
86 | } | |
87 | else | |
88 | { | |
89 | perror ("fork"); | |
90 | exit (1); | |
91 | } | |
92 | } | |
93 | } | |
94 | ||
95 | /* Set this to tell the thread_breakpoint thread to exit. */ | |
96 | volatile int break_out; | |
97 | ||
98 | static void * | |
99 | thread_breakpoint (void *arg) | |
100 | { | |
101 | pthread_barrier_wait (&barrier); | |
102 | ||
103 | while (!break_out) | |
104 | { | |
105 | usleep (1); /* set break here */ | |
106 | } | |
107 | ||
108 | return NULL; | |
109 | } | |
110 | ||
111 | pthread_barrier_t barrier; | |
112 | ||
113 | int | |
114 | main (void) | |
115 | { | |
116 | int i; | |
117 | int ret; | |
118 | pthread_t bp_thread; | |
119 | ||
120 | /* Don't run forever. */ | |
f6a9d9c7 | 121 | alarm (180); |
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122 | |
123 | pthread_barrier_init (&barrier, NULL, NTHREADS + 1); | |
124 | ||
125 | /* Start the threads that constantly fork. */ | |
126 | for (i = 0; i < NTHREADS; i++) | |
127 | { | |
128 | ret = pthread_create (&threads[i], NULL, thread_forks, NULL); | |
129 | assert (ret == 0); | |
130 | } | |
131 | ||
132 | /* Start the thread that constantly hit a conditional breakpoint | |
133 | that needs to be stepped over. */ | |
134 | ret = pthread_create (&bp_thread, NULL, thread_breakpoint, NULL); | |
135 | assert (ret == 0); | |
136 | ||
137 | /* Wait for forking to stop. */ | |
138 | for (i = 0; i < NTHREADS; i++) | |
139 | { | |
140 | ret = pthread_join (threads[i], NULL); | |
141 | assert (ret == 0); | |
142 | } | |
143 | ||
144 | break_out = 1; | |
145 | pthread_join (bp_thread, NULL); | |
146 | assert (ret == 0); | |
147 | ||
148 | return 0; | |
149 | } |