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06da0f77 PL |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
1d506c26 | 3 | Copyright 2015-2024 Free Software Foundation, Inc. |
06da0f77 PL |
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> | |
86e501af | 19 | #include <unistd.h> |
430e004e | 20 | #include "trace-common.h" |
06da0f77 PL |
21 | |
22 | /* Called if the testcase failed. */ | |
23 | static void | |
24 | fail (void) | |
25 | { | |
26 | } | |
27 | ||
28 | static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; | |
29 | ||
30 | /* This function overrides gdb_collect in the in-process agent library. | |
31 | See gdbserver/tracepoint.c (gdb_collect). We want this function to | |
32 | be ran instead of the one from the library to easily check that only | |
33 | one thread is tracing at a time. | |
34 | ||
35 | This works as expected because GDBserver will ask GDB about symbols | |
36 | present in the inferior with the 'qSymbol' packet. And GDB will | |
37 | reply with the address of this function instead of the one from the | |
38 | in-process agent library. */ | |
39 | ||
40 | void | |
41 | gdb_agent_gdb_collect (void *tpoint, unsigned char *regs) | |
42 | { | |
43 | /* If we cannot acquire a lock, then this means another thread is | |
44 | tracing and the lock implemented by the jump pad is not working! */ | |
45 | if (pthread_mutex_trylock (&mutex) != 0) | |
46 | { | |
47 | fail (); | |
48 | return; | |
49 | } | |
50 | ||
51 | sleep (1); | |
52 | ||
53 | if (pthread_mutex_unlock (&mutex) != 0) | |
54 | { | |
55 | fail (); | |
56 | return; | |
57 | } | |
58 | } | |
59 | ||
06da0f77 PL |
60 | static void * |
61 | thread_function (void *arg) | |
62 | { | |
430e004e | 63 | FAST_TRACEPOINT_LABEL(set_point); |
06da0f77 PL |
64 | } |
65 | ||
66 | static void | |
67 | end (void) | |
68 | { | |
69 | } | |
70 | ||
71 | int | |
72 | main (int argc, char *argv[], char *envp[]) | |
73 | { | |
74 | pthread_t threads[NUM_THREADS]; | |
75 | int i; | |
76 | ||
77 | for (i = 0; i < NUM_THREADS; i++) | |
78 | pthread_create (&threads[i], NULL, thread_function, NULL); | |
79 | ||
80 | for (i = 0; i < NUM_THREADS; i++) | |
81 | pthread_join (threads[i], NULL); | |
82 | ||
83 | end (); | |
84 | ||
85 | return 0; | |
86 | } |