diff options
author | H.J. Lu <hjl.tools@gmail.com> | 2014-11-28 07:54:07 -0800 |
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committer | H.J. Lu <hjl.tools@gmail.com> | 2014-11-28 07:57:40 -0800 |
commit | d8dd00805b8f3a011735d7a407097fb1c408d867 (patch) | |
tree | cc2f23b98c40684fa76e86a6230066d876b5e61b /nptl/tst-stack4.c | |
parent | 167da422b30b35c9eb9fc819ce5d3b3b0d65c6f4 (diff) |
Resize DTV if the current DTV isn't big enough
This patch changes _dl_allocate_tls_init to resize DTV if the current DTV
isn't big enough. Tested on X86-64, x32 and ia32.
[BZ #13862]
* elf/dl-tls.c: Include <atomic.h>.
(oom): Remove #ifdef SHARED/#endif.
(_dl_static_dtv, _dl_initial_dtv): Moved before ...
(_dl_resize_dtv): This. Extracted from _dl_update_slotinfo.
(_dl_allocate_tls_init): Resize DTV if the current DTV isn't
big enough.
(_dl_update_slotinfo): Call _dl_resize_dtv to resize DTV.
* nptl/Makefile (tests): Add tst-stack4.
(modules-names): Add tst-stack4mod.
($(objpfx)tst-stack4): New.
(tst-stack4mod.sos): Likewise.
($(objpfx)tst-stack4.out): Likewise.
($(tst-stack4mod.sos)): Likewise.
(clean): Likewise.
* nptl/tst-stack4.c: New file.
* nptl/tst-stack4mod.c: Likewise.
Diffstat (limited to 'nptl/tst-stack4.c')
-rw-r--r-- | nptl/tst-stack4.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/nptl/tst-stack4.c b/nptl/tst-stack4.c new file mode 100644 index 0000000000..d9c8df2c8d --- /dev/null +++ b/nptl/tst-stack4.c @@ -0,0 +1,159 @@ +/* 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" |