mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 22:40:05 +00:00
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* Check if pthread_atfork handler can call dlclose (BZ#24595).
|
|
Copyright (C) 2022-2023 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 <pthread.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdbool.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/xthread.h>
|
|
#include <support/capture_subprocess.h>
|
|
#include <support/xdlfcn.h>
|
|
|
|
/* Check if pthread_atfork handlers do not deadlock when calling a function
|
|
that might alter the internal fork handle list, such as dlclose.
|
|
|
|
The test registers a callback set with pthread_atfork(), dlopen() a shared
|
|
library (nptl/tst-atfork3mod.c), calls an exported symbol from the library
|
|
(which in turn also registers atfork handlers), and calls fork to trigger
|
|
the callbacks. */
|
|
|
|
static void *handler;
|
|
static bool run_dlclose_prepare;
|
|
static bool run_dlclose_parent;
|
|
static bool run_dlclose_child;
|
|
|
|
static void
|
|
prepare (void)
|
|
{
|
|
if (run_dlclose_prepare)
|
|
xdlclose (handler);
|
|
}
|
|
|
|
static void
|
|
parent (void)
|
|
{
|
|
if (run_dlclose_parent)
|
|
xdlclose (handler);
|
|
}
|
|
|
|
static void
|
|
child (void)
|
|
{
|
|
if (run_dlclose_child)
|
|
xdlclose (handler);
|
|
}
|
|
|
|
static void
|
|
proc_func (void *closure)
|
|
{
|
|
}
|
|
|
|
static void
|
|
do_test_generic (bool dlclose_prepare, bool dlclose_parent, bool dlclose_child)
|
|
{
|
|
run_dlclose_prepare = dlclose_prepare;
|
|
run_dlclose_parent = dlclose_parent;
|
|
run_dlclose_child = dlclose_child;
|
|
|
|
handler = xdlopen ("tst-atfork3mod.so", RTLD_NOW);
|
|
|
|
int (*atfork3mod_func)(void);
|
|
atfork3mod_func = xdlsym (handler, "atfork3mod_func");
|
|
|
|
atfork3mod_func ();
|
|
|
|
struct support_capture_subprocess proc
|
|
= support_capture_subprocess (proc_func, NULL);
|
|
support_capture_subprocess_check (&proc, "tst-atfork3", 0, sc_allow_none);
|
|
|
|
handler = atfork3mod_func = NULL;
|
|
|
|
support_capture_subprocess_free (&proc);
|
|
}
|
|
|
|
static void *
|
|
thread_func (void *closure)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
{
|
|
/* Make the process acts as multithread. */
|
|
pthread_attr_t attr;
|
|
xpthread_attr_init (&attr);
|
|
xpthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
|
|
xpthread_create (&attr, thread_func, NULL);
|
|
}
|
|
|
|
TEST_COMPARE (pthread_atfork (prepare, parent, child), 0);
|
|
|
|
do_test_generic (true /* prepare */, false /* parent */, false /* child */);
|
|
do_test_generic (false /* prepare */, true /* parent */, false /* child */);
|
|
do_test_generic (false /* prepare */, false /* parent */, true /* child */);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|