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glibc/nptl/tst-stack4.c
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/* Test DTV size oveflow when pthread_create reuses old DTV and TLS is | |
used by dlopened shared object. | |
Copyright (C) 2014-2016 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; | |
int t = (int) (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" |