1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* This testcase is part of GDB, the GNU debugger.
Copyright 2002-2015 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
void *thread_function(void *arg); /* Pointer to function executed by each thread */
#define NUM 1
unsigned int args[NUM+1];
int main() {
int res;
pthread_t threads[NUM];
void *thread_result;
long i;
for (i = 1; i <= NUM; i++)
{
args[i] = 1;
res = pthread_create(&threads[i - 1],
NULL,
thread_function,
(void *) i);
}
/* schedlock.exp: last thread start. */
args[0] = 1;
thread_function ((void *) 0);
exit(EXIT_SUCCESS);
}
void some_function (void) {
/* Sleep a bit to give the other threads a chance to run, if not
locked. This also ensure that even if the compiler optimizes out
or inlines some_function, there's still be some function that
needs to be stepped over. */
usleep (1);
}
/* When testing "next", this is set to have the loop call
some_function, which GDB should step over. When testing "step",
that would step into the function, which is not what we want. */
volatile int call_function = 0;
/* Call some_function if CALL_FUNCTION is set. This is wrapped in a
macro so that it's a single source line in the main loop. */
#define MAYBE_CALL_SOME_FUNCTION() \
do \
{ \
if (call_function) \
some_function (); \
} while (0)
void *thread_function(void *arg) {
int my_number = (long) arg;
int *myp = (int *) &args[my_number];
/* Don't run forever. Run just short of it :) */
while (*myp > 0)
{
/* schedlock.exp: main loop. */
MAYBE_CALL_SOME_FUNCTION(); (*myp) ++;
}
pthread_exit(NULL);
}
|
