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1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2014-2020 Free Software Foundation, Inc. |
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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 | ||
22 | pthread_barrier_t barrier; | |
23 | pthread_t child_thread; | |
24 | ||
25 | volatile unsigned int counter = 1; | |
26 | volatile unsigned int watch_me; | |
27 | volatile unsigned int other; | |
28 | ||
29 | void * | |
30 | child_function (void *arg) | |
31 | { | |
32 | pthread_barrier_wait (&barrier); | |
33 | ||
34 | while (counter > 0) | |
35 | { | |
36 | counter++; | |
37 | ||
38 | watch_me = 1; /* set breakpoint child here */ | |
ebc90b50 | 39 | other = 1; |
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40 | usleep (1); |
41 | } | |
42 | ||
43 | pthread_exit (NULL); | |
44 | } | |
45 | ||
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46 | int |
47 | main () | |
48 | { | |
49 | int res; | |
50 | long i; | |
51 | ||
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52 | alarm (300); |
53 | ||
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54 | pthread_barrier_init (&barrier, NULL, 2); |
55 | ||
56 | res = pthread_create (&child_thread, NULL, child_function, NULL); | |
57 | pthread_barrier_wait (&barrier); | |
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58 | |
59 | /* Use an infinite loop with no function calls so that "step" over | |
60 | this line never finishes before the watchpoint in the other | |
61 | thread triggers. That can happen if the step-over of thread 2 is | |
62 | done with displaced stepping on a target that is always in | |
63 | non-stop mode, as in that case GDB runs both threads | |
64 | simultaneously. */ | |
65 | while (1); /* set wait-thread breakpoint here */ | |
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66 | |
67 | pthread_join (child_thread, NULL); | |
68 | ||
69 | exit (EXIT_SUCCESS); | |
70 | } |