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An application that erroneously tries to repeatedly dlopen("a.out", ...)
may hit assertion failure:
Inconsistency detected by ld.so: dl-tls.c: 474: _dl_allocate_tls_init:
Assertion `listp != ((void *)0)' failed!
dlopen() actually fails with "./a.out: cannot dynamically load executable",
but it does so after incrementing dl_tls_max_dtv_idx.
Once we run out of TLS_SLOTINFO_SURPLUS (62), we exit with above assertion
failure.
2014-03-24 Paul Pluzhnikov <ppluzhnikov@google.com>
[BZ #16634]
* elf/dl-load.c (open_verify): Add mode parameter.
Error early when ET_EXEC and mode does not have __RTLD_OPENEXEC.
(open_path): Change from boolean 'secure' to complete flag 'mode'
(_dl_map_object): Adjust.
* elf/Makefile (tests): Add tst-dlopen-aout.
* elf/tst-dlopen-aout.c: New test.- Loading branch information
Paul Pluzhnikov
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* Test case for BZ #16634. | ||
| 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/>. | ||
| Note: this test currently only fails when glibc is configured with | ||
| --enable-hardcoded-path-in-tests. */ | ||
|
|
||
| #include <assert.h> | ||
| #include <dlfcn.h> | ||
| #include <stdio.h> | ||
| #include <pthread.h> | ||
|
|
||
| __thread int x; | ||
|
|
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| void * | ||
| fn (void *p) | ||
| { | ||
| return p; | ||
| } | ||
|
|
||
| int | ||
| main (int argc, char *argv[]) | ||
| { | ||
| int j; | ||
|
|
||
| for (j = 0; j < 100; ++j) | ||
| { | ||
| pthread_t thr; | ||
| void *p; | ||
| int rc; | ||
|
|
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| p = dlopen (argv[0], RTLD_LAZY); | ||
| if (p != NULL) | ||
| { | ||
| fprintf (stderr, "dlopen unexpectedly succeeded\n"); | ||
| return 1; | ||
| } | ||
| rc = pthread_create (&thr, NULL, fn, NULL); | ||
| assert (rc == 0); | ||
|
|
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| rc = pthread_join (thr, NULL); | ||
| assert (rc == 0); | ||
| } | ||
|
|
||
| return 0; | ||
| } |