mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* Test for exit/dlclose race (Bug 22180).
|
|
Copyright (C) 2017-2021 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This file must be run from within a directory called "stdlib". */
|
|
|
|
/* This test verifies that when dlopen in one thread races against exit
|
|
in another thread, we don't call registered destructor twice.
|
|
|
|
Expected result:
|
|
second
|
|
first
|
|
... clean termination
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <semaphore.h>
|
|
#include <support/check.h>
|
|
#include <support/xdlfcn.h>
|
|
#include <support/xthread.h>
|
|
|
|
/* Semaphore to ensure we have a happens-before between the first function
|
|
starting and exit being called. */
|
|
sem_t order1;
|
|
|
|
/* Semaphore to ensure we have a happens-before between the second function
|
|
starting and the first function returning. */
|
|
sem_t order2;
|
|
|
|
void *
|
|
exit_thread (void *arg)
|
|
{
|
|
/* Wait for the dlclose to start... */
|
|
sem_wait (&order1);
|
|
/* Then try to run the exit sequence which should call all
|
|
__cxa_atexit registered functions and in parallel with
|
|
the executing dlclose(). */
|
|
exit (0);
|
|
}
|
|
|
|
|
|
void
|
|
last (void)
|
|
{
|
|
/* Let dlclose thread proceed. */
|
|
sem_post (&order2);
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
void *dso;
|
|
pthread_t thread;
|
|
|
|
atexit (last);
|
|
|
|
dso = xdlopen ("$ORIGIN/test-dlclose-exit-race-helper.so",
|
|
RTLD_NOW|RTLD_GLOBAL);
|
|
thread = xpthread_create (NULL, exit_thread, NULL);
|
|
|
|
xdlclose (dso);
|
|
xpthread_join (thread);
|
|
|
|
FAIL_EXIT1 ("Did not terminate via exit(0) in exit_thread() as expected.");
|
|
}
|