mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/* Verify that DSO is unloaded only if its TLS objects are destroyed.
|
|
Copyright (C) 2013-2014 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/>. */
|
|
|
|
/* There are two tests in this test case. The first is implicit where it is
|
|
assumed that the destructor call on exit of the LOAD function does not
|
|
segfault. The other is a verification that after the thread has exited, a
|
|
dlclose will unload the DSO. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
void *handle;
|
|
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
void *
|
|
load (void *u)
|
|
{
|
|
pthread_mutex_lock (&m);
|
|
handle = dlopen ("$ORIGIN/tst-tls-atexit-lib.so", RTLD_LAZY);
|
|
if (!handle)
|
|
{
|
|
printf ("Unable to load DSO: %s\n", dlerror ());
|
|
return (void *) (uintptr_t) 1;
|
|
}
|
|
|
|
void (*foo) (void) = (void (*) (void)) dlsym(handle, "do_foo");
|
|
|
|
if (!foo)
|
|
{
|
|
printf ("Unable to find symbol: %s\n", dlerror ());
|
|
exit (1);
|
|
}
|
|
|
|
foo ();
|
|
|
|
/* This should not unload the DSO. If it does, then the thread exit will
|
|
result in a segfault. */
|
|
dlclose (handle);
|
|
pthread_mutex_unlock (&m);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
pthread_t t;
|
|
int ret;
|
|
void *thr_ret;
|
|
|
|
if ((ret = pthread_create (&t, NULL, load, NULL)) != 0)
|
|
{
|
|
printf ("pthread_create failed: %s\n", strerror (ret));
|
|
return 1;
|
|
}
|
|
|
|
if ((ret = pthread_join (t, &thr_ret)) != 0)
|
|
{
|
|
printf ("pthread_create failed: %s\n", strerror (ret));
|
|
return 1;
|
|
}
|
|
|
|
if (thr_ret != NULL)
|
|
return 1;
|
|
|
|
/* Now this should unload the DSO. */
|
|
dlclose (handle);
|
|
|
|
/* Run through our maps and ensure that the DSO is unloaded. */
|
|
FILE *f = fopen ("/proc/self/maps", "r");
|
|
|
|
if (f == NULL)
|
|
{
|
|
perror ("Failed to open /proc/self/maps");
|
|
fprintf (stderr, "Skipping verification of DSO unload\n");
|
|
return 0;
|
|
}
|
|
|
|
char *line = NULL;
|
|
size_t s = 0;
|
|
while (getline (&line, &s, f) > 0)
|
|
{
|
|
if (strstr (line, "tst-tls-atexit-lib.so"))
|
|
{
|
|
printf ("DSO not unloaded yet:\n%s", line);
|
|
return 1;
|
|
}
|
|
}
|
|
free (line);
|
|
|
|
return 0;
|
|
}
|