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1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
42a4f53d | 3 | Copyright 2009-2019 Free Software Foundation, Inc. |
d137e6dc 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 <pthread.h> | |
19 | #include <unistd.h> | |
20 | #include <stdlib.h> | |
21 | #include <signal.h> | |
22 | ||
23 | unsigned int args[2]; | |
24 | ||
d137e6dc PA |
25 | pthread_barrier_t barrier; |
26 | pthread_t child_thread_2, child_thread_3; | |
27 | ||
28 | void | |
29 | handler (int signo) | |
30 | { | |
31 | /* so that thread 3 is sure to run, in case the bug is present. */ | |
32 | usleep (10); | |
33 | } | |
34 | ||
35 | void | |
36 | callme (void) | |
37 | { | |
38 | } | |
39 | ||
d137e6dc PA |
40 | void * |
41 | child_function_3 (void *arg) | |
42 | { | |
43 | int my_number = (long) arg; | |
44 | volatile int *myp = (int *) &args[my_number]; | |
45 | ||
46 | pthread_barrier_wait (&barrier); | |
47 | ||
48 | while (*myp > 0) | |
49 | { | |
50 | (*myp) ++; /* set breakpoint child_two here */ | |
51 | callme (); | |
52 | } | |
53 | ||
54 | pthread_exit (NULL); | |
55 | } | |
56 | ||
57 | void * | |
58 | child_function_2 (void *arg) | |
59 | { | |
60 | int my_number = (long) arg; | |
61 | volatile int *myp = (int *) &args[my_number]; | |
62 | ||
d137e6dc PA |
63 | pthread_barrier_wait (&barrier); |
64 | ||
65 | while (*myp > 0) | |
66 | { | |
67 | (*myp) ++; | |
68 | callme (); /* set breakpoint child_one here */ | |
69 | } | |
70 | ||
71 | *myp = 1; | |
72 | while (*myp > 0) | |
73 | { | |
74 | (*myp) ++; | |
75 | callme (); | |
76 | } | |
77 | ||
78 | pthread_exit (NULL); | |
79 | } | |
80 | ||
81 | ||
82 | int | |
83 | main () | |
84 | { | |
85 | int res; | |
86 | long i; | |
87 | ||
d137e6dc PA |
88 | signal (SIGUSR1, handler); |
89 | ||
90 | /* Call these early so that PLTs for these are resolved soon, | |
91 | instead of in the threads. RTLD_NOW should work as well. */ | |
92 | usleep (0); | |
93 | pthread_barrier_init (&barrier, NULL, 1); | |
94 | pthread_barrier_wait (&barrier); | |
95 | ||
96 | pthread_barrier_init (&barrier, NULL, 2); | |
97 | ||
d137e6dc PA |
98 | i = 0; |
99 | args[i] = 1; | |
100 | res = pthread_create (&child_thread_2, | |
101 | NULL, child_function_2, (void *) i); | |
102 | pthread_barrier_wait (&barrier); | |
103 | callme (); /* set wait-thread-2 breakpoint here */ | |
104 | ||
105 | i = 1; | |
106 | args[i] = 1; | |
107 | res = pthread_create (&child_thread_3, | |
108 | NULL, child_function_3, (void *) i); | |
109 | pthread_barrier_wait (&barrier); | |
110 | callme (); /* set wait-thread-3 breakpoint here */ | |
111 | ||
9f5e1e02 PA |
112 | pthread_kill (child_thread_2, SIGUSR1); |
113 | ||
d137e6dc PA |
114 | pthread_join (child_thread_2, NULL); |
115 | pthread_join (child_thread_3, NULL); | |
116 | ||
117 | exit(EXIT_SUCCESS); | |
118 | } |