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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /nptl/tst-join7.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'nptl/tst-join7.c')
-rw-r--r-- | nptl/tst-join7.c | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/nptl/tst-join7.c b/nptl/tst-join7.c deleted file mode 100644 index af2c5d16dc..0000000000 --- a/nptl/tst-join7.c +++ /dev/null @@ -1,46 +0,0 @@ -/* Verify that TLS access in separate thread in a dlopened library does not - deadlock. - Copyright (C) 2015-2017 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/>. */ - -#include <dlfcn.h> - -/* When one dynamically loads a module, which spawns a thread to perform some - activities, it could be possible that TLS storage is accessed for the first - time in that thread. This results in an allocation request within the - thread, which could result in an attempt to take the rtld load_lock. This - is a problem because it would then deadlock with the dlopen (which owns the - lock), if the main thread is waiting for the spawned thread to exit. We can - at least ensure that this problem does not occur due to accesses within - libc.so, by marking TLS variables within libc.so as IE. The problem of an - arbitrary variable being accessed and constructed within such a thread still - exists but this test case does not verify that. */ - -int -do_test (void) -{ - void *f = dlopen ("tst-join7mod.so", RTLD_NOW | RTLD_GLOBAL); - if (f) - dlclose (f); - else - return 1; - - return 0; -} - -#define TEST_FUNCTION do_test () -#include "../test-skeleton.c" |