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b89667eb DE |
1 | /* Test case for hand function calls interrupted by a signal in another thread. |
2 | ||
ecd75fc8 | 3 | Copyright 2008-2014 Free Software Foundation, Inc. |
b89667eb DE |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <pthread.h> | |
21 | #include <signal.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <time.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #ifndef NR_THREADS | |
28 | #define NR_THREADS 4 | |
29 | #endif | |
30 | ||
31 | pthread_t threads[NR_THREADS]; | |
32 | ||
33 | /* Number of threads currently running. */ | |
34 | int thread_count; | |
35 | ||
36 | pthread_mutex_t thread_count_mutex; | |
37 | ||
38 | pthread_cond_t thread_count_condvar; | |
39 | ||
40 | sig_atomic_t sigabrt_received; | |
41 | ||
42 | void | |
43 | incr_thread_count (void) | |
44 | { | |
45 | pthread_mutex_lock (&thread_count_mutex); | |
46 | ++thread_count; | |
47 | if (thread_count == NR_THREADS) | |
48 | pthread_cond_signal (&thread_count_condvar); | |
49 | pthread_mutex_unlock (&thread_count_mutex); | |
50 | } | |
51 | ||
52 | void | |
53 | cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut) | |
54 | { | |
55 | pthread_mutex_lock (mut); | |
56 | pthread_cond_wait (cond, mut); | |
57 | pthread_mutex_unlock (mut); | |
58 | } | |
59 | ||
60 | void | |
61 | noreturn (void) | |
62 | { | |
63 | pthread_mutex_t mut; | |
64 | pthread_cond_t cond; | |
65 | ||
66 | pthread_mutex_init (&mut, NULL); | |
67 | pthread_cond_init (&cond, NULL); | |
68 | ||
69 | /* Wait for a condition that will never be signaled, so we effectively | |
70 | block the thread here. */ | |
71 | cond_wait (&cond, &mut); | |
72 | } | |
73 | ||
74 | void * | |
75 | thread_entry (void *unused) | |
76 | { | |
77 | incr_thread_count (); | |
78 | noreturn (); | |
79 | } | |
80 | ||
81 | void | |
82 | sigabrt_handler (int signo) | |
83 | { | |
84 | sigabrt_received = 1; | |
85 | } | |
86 | ||
87 | /* Helper to test a hand-call being "interrupted" by a signal on another | |
88 | thread. */ | |
89 | ||
90 | void | |
91 | hand_call_with_signal (void) | |
92 | { | |
93 | const struct timespec ts = { 0, 10000000 }; /* 0.01 sec */ | |
94 | ||
95 | sigabrt_received = 0; | |
96 | pthread_kill (threads[0], SIGABRT); | |
97 | while (! sigabrt_received) | |
98 | nanosleep (&ts, NULL); | |
99 | } | |
100 | ||
101 | /* Wait until all threads are running. */ | |
102 | ||
103 | void | |
104 | wait_all_threads_running (void) | |
105 | { | |
106 | pthread_mutex_lock (&thread_count_mutex); | |
107 | if (thread_count == NR_THREADS) | |
108 | { | |
109 | pthread_mutex_unlock (&thread_count_mutex); | |
110 | return; | |
111 | } | |
112 | pthread_cond_wait (&thread_count_condvar, &thread_count_mutex); | |
113 | if (thread_count == NR_THREADS) | |
114 | { | |
115 | pthread_mutex_unlock (&thread_count_mutex); | |
116 | return; | |
117 | } | |
118 | pthread_mutex_unlock (&thread_count_mutex); | |
119 | printf ("failed waiting for all threads to start\n"); | |
120 | abort (); | |
121 | } | |
122 | ||
123 | /* Called when all threads are running. | |
124 | Easy place for a breakpoint. */ | |
125 | ||
126 | void | |
127 | all_threads_running (void) | |
128 | { | |
129 | } | |
130 | ||
131 | int | |
132 | main (void) | |
133 | { | |
134 | int i; | |
135 | ||
136 | signal (SIGABRT, sigabrt_handler); | |
137 | ||
138 | pthread_mutex_init (&thread_count_mutex, NULL); | |
139 | pthread_cond_init (&thread_count_condvar, NULL); | |
140 | ||
141 | for (i = 0; i < NR_THREADS; ++i) | |
142 | pthread_create (&threads[i], NULL, thread_entry, NULL); | |
143 | ||
144 | wait_all_threads_running (); | |
145 | all_threads_running (); | |
146 | ||
147 | return 0; | |
148 | } | |
149 |