]>
Commit | Line | Data |
---|---|---|
afd82ef5 | 1 | // |
a5544970 | 2 | // Copyright (C) 2007-2019 Free Software Foundation, Inc. |
afd82ef5 DK |
3 | // |
4 | // This file is part of the GNU ISO C++ Library. This library is free | |
5 | // software; you can redistribute it and/or modify it under the | |
6 | // terms of the GNU General Public License as published by the | |
748086b7 | 7 | // Free Software Foundation; either version 3, or (at your option) |
afd82ef5 DK |
8 | // any later version. |
9 | // | |
10 | // This library 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 along | |
748086b7 JJ |
16 | // with this library; see the file COPYING3. If not see |
17 | // <http://www.gnu.org/licenses/>. | |
afd82ef5 | 18 | |
d1236680 RO |
19 | // { dg-do run } |
20 | // { dg-options "-pthread" } | |
21 | // { dg-require-effective-target pthread } | |
afd82ef5 DK |
22 | |
23 | #include <cstdlib> | |
24 | #include <pthread.h> | |
25 | ||
26 | // This used to deadlock with the old libstdc++ because there is only one | |
27 | // global mutex guarding initialization of statics and it is held during by | |
28 | // the initializer thread of a static until the variable is completely | |
29 | // initialized. If the initializer thread creates and waits for another thread | |
30 | // which also initializes a static variable, there will be a deadlock because | |
31 | // the first thread is holding the mutex and waiting for the second thread, | |
32 | // which is blocked when it is acquiring the mutex. | |
33 | ||
34 | int | |
35 | get_bar (void) | |
36 | { | |
37 | return 1; | |
38 | } | |
39 | ||
40 | void* | |
41 | do_something (void *arg) | |
42 | { | |
395c9e79 | 43 | static int bar __attribute__((unused)) = get_bar (); |
8fc81078 | 44 | return 0; |
afd82ef5 DK |
45 | } |
46 | ||
47 | int | |
48 | get_foo (void) | |
49 | { | |
afd82ef5 DK |
50 | pthread_t new_thread; |
51 | ||
8fc81078 | 52 | if (pthread_create (&new_thread, 0, do_something, 0) != 0) |
afd82ef5 DK |
53 | std::abort (); |
54 | ||
8fc81078 | 55 | if (pthread_join (new_thread, 0) != 0) |
afd82ef5 DK |
56 | std::abort (); |
57 | ||
58 | return 1; | |
59 | } | |
60 | ||
61 | int | |
62 | main (int argc, char **argv) | |
63 | { | |
395c9e79 | 64 | static int foo __attribute__((unused)) = get_foo (); |
afd82ef5 DK |
65 | return 0; |
66 | } |