diff options
Diffstat (limited to 'stdlib/tst-tls-atexit.c')
-rw-r--r-- | stdlib/tst-tls-atexit.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/stdlib/tst-tls-atexit.c b/stdlib/tst-tls-atexit.c deleted file mode 100644 index 6dbf49d460..0000000000 --- a/stdlib/tst-tls-atexit.c +++ /dev/null @@ -1,156 +0,0 @@ -/* Verify that DSO is unloaded only if its TLS objects are destroyed. - Copyright (C) 2013-2017 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/>. */ - -/* For the default case, i.e. NO_DELETE not defined, the test dynamically loads - a DSO and spawns a thread that subsequently calls into the DSO to register a - destructor for an object in the DSO and then calls dlclose on the handle for - the DSO. When the thread exits, the DSO should not be unloaded or else the - destructor called during thread exit will crash. Further in the main - thread, the DSO is opened and closed again, at which point the DSO should be - unloaded. - - When NO_DELETE is defined, the DSO is loaded twice, once with just RTLD_LAZY - flag and the second time with the RTLD_NODELETE flag set. The thread is - spawned, destructor registered and then thread exits without closing the - DSO. In the main thread, the first handle is then closed, followed by the - second handle. In the end, the DSO should remain loaded due to the - RTLD_NODELETE flag being set in the second dlopen call. */ - -#include <dlfcn.h> -#include <pthread.h> -#include <stdio.h> -#include <unistd.h> -#include <string.h> -#include <errno.h> -#include <link.h> -#include <stdbool.h> - -#ifndef NO_DELETE -# define LOADED_IS_GOOD false -#endif - -#ifndef H2_RTLD_FLAGS -# define H2_RTLD_FLAGS (RTLD_LAZY) -#endif - -#define DSO_NAME "$ORIGIN/tst-tls-atexit-lib.so" - -/* Walk through the map in the _r_debug structure to see if our lib is still - loaded. */ -static bool -is_loaded (void) -{ - struct link_map *lm = (struct link_map *) _r_debug.r_map; - - for (; lm; lm = lm->l_next) - if (lm->l_type == lt_loaded && lm->l_name - && strcmp (basename (DSO_NAME), basename (lm->l_name)) == 0) - { - printf ("%s is still loaded\n", lm->l_name); - return true; - } - return false; -} - -/* Accept a valid handle returned by DLOPEN, load the reg_dtor symbol to - register a destructor and then call dlclose on the handle. The dlclose - should not unload the DSO since the destructor has not been called yet. */ -static void * -reg_dtor_and_close (void *h) -{ - void (*reg_dtor) (void) = (void (*) (void)) dlsym (h, "reg_dtor"); - - if (reg_dtor == NULL) - { - printf ("Unable to find symbol: %s\n", dlerror ()); - return (void *) (uintptr_t) 1; - } - - reg_dtor (); - -#ifndef NO_DELETE - dlclose (h); -#endif - - return NULL; -} - -static int -spawn_thread (void *h) -{ - pthread_t t; - int ret; - void *thr_ret; - - if ((ret = pthread_create (&t, NULL, reg_dtor_and_close, h)) != 0) - { - printf ("pthread_create failed: %s\n", strerror (ret)); - return 1; - } - - if ((ret = pthread_join (t, &thr_ret)) != 0) - { - printf ("pthread_join failed: %s\n", strerror (ret)); - return 1; - } - - if (thr_ret != NULL) - return 1; - - return 0; -} - -static int -do_test (void) -{ - /* Load the DSO. */ - void *h1 = dlopen (DSO_NAME, RTLD_LAZY); - if (h1 == NULL) - { - printf ("h1: Unable to load DSO: %s\n", dlerror ()); - return 1; - } - -#ifndef NO_DELETE - if (spawn_thread (h1) != 0) - return 1; -#endif - - void *h2 = dlopen (DSO_NAME, H2_RTLD_FLAGS); - if (h2 == NULL) - { - printf ("h2: Unable to load DSO: %s\n", dlerror ()); - return 1; - } - -#ifdef NO_DELETE - if (spawn_thread (h1) != 0) - return 1; - - dlclose (h1); -#endif - dlclose (h2); - - /* Check link maps to ensure that the DSO has unloaded. In the normal case, - the DSO should be unloaded if there are no uses. However, if one of the - dlopen calls were with RTLD_NODELETE, the DSO should remain loaded. */ - return is_loaded () == LOADED_IS_GOOD ? 0 : 1; -} - -#define TEST_FUNCTION do_test () -#include "../test-skeleton.c" |