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
|
/* Test with many dynamic TLS variables.
Copyright (C) 2016-2020 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
<https://www.gnu.org/licenses/>. */
/* This test intends to exercise dynamic TLS variable allocation. It
achieves this by combining dlopen (to avoid static TLS allocation
after static TLS resizing), many DSOs with a large variable (to
exceed the static TLS reserve), and an already-running thread (to
force full dynamic TLS initialization). */
#include "tst-tls-manydynamic.h"
#include <errno.h>
#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int do_test (void);
#include <support/xthread.h>
#include <support/test-driver.c>
void *handles[COUNT];
set_value_func set_value_funcs[COUNT];
get_value_func get_value_funcs[COUNT];
static void
init_functions (void)
{
for (int i = 0; i < COUNT; ++i)
{
/* Open the module. */
{
char soname[100];
snprintf (soname, sizeof (soname), "tst-tls-manydynamic%02dmod.so", i);
handles[i] = dlopen (soname, RTLD_LAZY);
if (handles[i] == NULL)
{
printf ("error: dlopen failed: %s\n", dlerror ());
exit (1);
}
}
/* Obtain the setter function. */
{
char fname[100];
snprintf (fname, sizeof (fname), "set_value_%02d", i);
void *func = dlsym (handles[i], fname);
if (func == NULL)
{
printf ("error: dlsym: %s\n", dlerror ());
exit (1);
}
set_value_funcs[i] = func;
}
/* Obtain the getter function. */
{
char fname[100];
snprintf (fname, sizeof (fname), "get_value_%02d", i);
void *func = dlsym (handles[i], fname);
if (func == NULL)
{
printf ("error: dlsym: %s\n", dlerror ());
exit (1);
}
get_value_funcs[i] = func;
}
}
}
static pthread_barrier_t barrier;
/* Running thread which forces real TLS initialization. */
static void *
blocked_thread_func (void *closure)
{
xpthread_barrier_wait (&barrier);
/* TLS test runs here in the main thread. */
xpthread_barrier_wait (&barrier);
return NULL;
}
static int
do_test (void)
{
{
int ret = pthread_barrier_init (&barrier, NULL, 2);
if (ret != 0)
{
errno = ret;
printf ("error: pthread_barrier_init: %m\n");
exit (1);
}
}
pthread_t blocked_thread = xpthread_create (NULL, blocked_thread_func, NULL);
xpthread_barrier_wait (&barrier);
init_functions ();
struct value values[COUNT];
/* Initialze the TLS variables. */
for (int i = 0; i < COUNT; ++i)
{
for (int j = 0; j < PER_VALUE_COUNT; ++j)
values[i].num[j] = rand ();
set_value_funcs[i] (&values[i]);
}
/* Read back their values to check that they do not overlap. */
for (int i = 0; i < COUNT; ++i)
{
struct value actual;
get_value_funcs[i] (&actual);
for (int j = 0; j < PER_VALUE_COUNT; ++j)
if (actual.num[j] != values[i].num[j])
{
printf ("error: mismatch at variable %d/%d: %d != %d\n",
i, j, actual.num[j], values[i].num[j]);
exit (1);
}
}
xpthread_barrier_wait (&barrier);
xpthread_join (blocked_thread);
/* Close the modules. */
for (int i = 0; i < COUNT; ++i)
dlclose (handles[i]);
return 0;
}
|
