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81219e53 DE |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
3 | Copyright 2014 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 <pthread.h> | |
19 | #include <signal.h> | |
20 | #include <stdlib.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | /* Used to individually advance each thread to the desired stopping point. */ | |
24 | int ready; | |
25 | ||
26 | sig_atomic_t sigusr1_received; | |
27 | sig_atomic_t sigusr2_received; | |
28 | sig_atomic_t sigabrt_received; | |
29 | ||
57cbd724 DE |
30 | /* Number of threads currently running. */ |
31 | int thread_count; | |
32 | pthread_mutex_t thread_count_mutex; | |
33 | pthread_cond_t thread_count_condvar; | |
34 | ||
35 | static void | |
36 | incr_thread_count (void) | |
37 | { | |
38 | pthread_mutex_lock (&thread_count_mutex); | |
39 | ++thread_count; | |
40 | pthread_cond_signal (&thread_count_condvar); | |
41 | pthread_mutex_unlock (&thread_count_mutex); | |
42 | } | |
43 | ||
81219e53 DE |
44 | static void |
45 | sigusr1_handler (int sig) | |
46 | { | |
47 | sigusr1_received = 1; | |
48 | } | |
49 | ||
50 | static void | |
51 | sigusr2_handler (int sig) | |
52 | { | |
53 | sigusr2_received = 1; | |
54 | } | |
55 | ||
56 | static void | |
57 | sigabrt_handler (int sig) | |
58 | { | |
59 | sigabrt_received = 1; | |
60 | } | |
61 | ||
62 | static void * | |
63 | sigusr1_thread_function (void *unused) | |
64 | { | |
57cbd724 | 65 | incr_thread_count (); |
81219e53 DE |
66 | while (!ready) |
67 | usleep (100); | |
68 | pthread_kill (pthread_self (), SIGUSR1); | |
69 | } | |
70 | ||
71 | static void * | |
72 | sigusr2_thread_function (void *unused) | |
73 | { | |
57cbd724 | 74 | incr_thread_count (); |
81219e53 DE |
75 | while (!ready) |
76 | usleep (100); | |
77 | /* pthread_kill (pthread_self (), SIGUSR2); - manually injected by gdb */ | |
78 | } | |
79 | ||
57cbd724 DE |
80 | /* Wait until all threads are at a point where a backtrace will |
81 | show the thread entry point function. */ | |
82 | ||
83 | static void | |
84 | wait_all_threads_running (int nr_threads) | |
85 | { | |
86 | pthread_mutex_lock (&thread_count_mutex); | |
87 | ||
88 | while (1) | |
89 | { | |
90 | if (thread_count == nr_threads) | |
91 | { | |
92 | pthread_mutex_unlock (&thread_count_mutex); | |
93 | return; | |
94 | } | |
95 | pthread_cond_wait (&thread_count_condvar, &thread_count_mutex); | |
96 | } | |
97 | } | |
98 | ||
81219e53 DE |
99 | static void |
100 | all_threads_running (void) | |
101 | { | |
102 | while (!ready) | |
103 | usleep (100); | |
104 | } | |
105 | ||
106 | static void | |
107 | all_threads_done (void) | |
108 | { | |
109 | } | |
110 | ||
111 | int | |
112 | main () | |
113 | { | |
114 | pthread_t sigusr1_thread, sigusr2_thread; | |
115 | ||
116 | /* Protect against running forever. */ | |
117 | alarm (60); | |
118 | ||
119 | signal (SIGUSR1, sigusr1_handler); | |
120 | signal (SIGUSR2, sigusr2_handler); | |
121 | signal (SIGABRT, sigabrt_handler); | |
122 | ||
123 | /* Don't let any thread advance past initialization. */ | |
124 | ready = 0; | |
125 | ||
57cbd724 DE |
126 | pthread_mutex_init (&thread_count_mutex, NULL); |
127 | pthread_cond_init (&thread_count_condvar, NULL); | |
128 | ||
129 | #define NR_THREADS 2 | |
81219e53 DE |
130 | pthread_create (&sigusr1_thread, NULL, sigusr1_thread_function, NULL); |
131 | pthread_create (&sigusr2_thread, NULL, sigusr2_thread_function, NULL); | |
57cbd724 | 132 | wait_all_threads_running (NR_THREADS); |
81219e53 DE |
133 | all_threads_running (); |
134 | ||
135 | pthread_kill (pthread_self (), SIGABRT); | |
136 | ||
137 | pthread_join (sigusr1_thread, NULL); | |
138 | pthread_join (sigusr2_thread, NULL); | |
139 | all_threads_done (); | |
140 | ||
141 | return 0; | |
142 | } |