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
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* Test DTV size oveflow when pthread_create reuses old DTV and TLS is
used by dlopened shared object.
Copyright (C) 2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdint.h>
#include <dlfcn.h>
#include <assert.h>
#include <pthread.h>
/* The choices of thread count, and file counts are arbitary.
The point is simply to run enough threads that an exiting
thread has it's stack reused by another thread at the same
time as new libraries have been loaded. */
#define DSO_SHARED_FILES 20
#define DSO_OPEN_THREADS 20
#define DSO_EXEC_THREADS 2
/* Used to make sure that only one thread is calling dlopen and dlclose
at a time. */
pthread_mutex_t g_lock;
typedef void (*function) (void);
void *
dso_invoke(void *dso_fun)
{
function *fun_vec = (function *) dso_fun;
int dso;
for (dso = 0; dso < DSO_SHARED_FILES; dso++)
(*fun_vec[dso]) ();
pthread_exit (NULL);
}
void *
dso_process (void * p)
{
void *handle[DSO_SHARED_FILES];
function fun_vec[DSO_SHARED_FILES];
char dso_path[DSO_SHARED_FILES][100];
int dso;
uintptr_t t = (uintptr_t) p;
/* Open DSOs and get a function. */
for (dso = 0; dso < DSO_SHARED_FILES; dso++)
{
sprintf (dso_path[dso], "tst-stack4mod-%i-%i.so", t, dso);
pthread_mutex_lock (&g_lock);
handle[dso] = dlopen (dso_path[dso], RTLD_NOW);
assert (handle[dso]);
fun_vec[dso] = (function) dlsym (handle[dso], "function");
assert (fun_vec[dso]);
pthread_mutex_unlock (&g_lock);
}
/* Spawn workers. */
pthread_t thread[DSO_EXEC_THREADS];
int i, ret;
uintptr_t result = 0;
for (i = 0; i < DSO_EXEC_THREADS; i++)
{
pthread_mutex_lock (&g_lock);
ret = pthread_create (&thread[i], NULL, dso_invoke, (void *) fun_vec);
if (ret != 0)
{
printf ("pthread_create failed: %d\n", ret);
result = 1;
}
pthread_mutex_unlock (&g_lock);
}
if (!result)
for (i = 0; i < DSO_EXEC_THREADS; i++)
{
ret = pthread_join (thread[i], NULL);
if (ret != 0)
{
printf ("pthread_join failed: %d\n", ret);
result = 1;
}
}
/* Close all DSOs. */
for (dso = 0; dso < DSO_SHARED_FILES; dso++)
{
pthread_mutex_lock (&g_lock);
dlclose (handle[dso]);
pthread_mutex_unlock (&g_lock);
}
/* Exit. */
pthread_exit ((void *) result);
}
static int
do_test (void)
{
pthread_t thread[DSO_OPEN_THREADS];
int i,j;
int ret;
int result = 0;
pthread_mutex_init (&g_lock, NULL);
/* 100 is arbitrary here and is known to trigger PR 13862. */
for (j = 0; j < 100; j++)
{
for (i = 0; i < DSO_OPEN_THREADS; i++)
{
ret = pthread_create (&thread[i], NULL, dso_process,
(void *) (uintptr_t) i);
if (ret != 0)
{
printf ("pthread_create failed: %d\n", ret);
result = 1;
}
}
if (result)
break;
for (i = 0; i < DSO_OPEN_THREADS; i++)
{
ret = pthread_join (thread[i], NULL);
if (ret != 0)
{
printf ("pthread_join failed: %d\n", ret);
result = 1;
}
}
}
return result;
}
#define TEST_FUNCTION do_test ()
#define TIMEOUT 100
#include "../test-skeleton.c"
|
