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Test for deadlock situation when running destructors for DSOs.

This commit is contained in:
Ulrich Drepper 2004-07-07 07:36:37 +00:00
parent 4183d2a76b
commit e782376c01
2 changed files with 107 additions and 0 deletions
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35
nptl/tst-fini1.c Normal file
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/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <unistd.h>
extern void m (void);
int
main (void)
{
alarm (5);
m ();
/* The destructor is supposed to run now. Make sure that if it is
not we will notice it by using 42 as the exit code. In case the
destructor is run it will terminate with status zero. */
return 42;
}

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nptl/tst-fini1mod.c Normal file
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/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static void *
tf (void *arg)
{
int fds[2];
if (pipe (fds) != 0)
{
puts ("pipe failed");
exit (1);
}
char buf[10];
read (fds[0], buf, sizeof (buf));
puts ("read returned");
exit (1);
}
static pthread_t th;
static void
__attribute ((destructor))
dest (void)
{
if (pthread_cancel (th) != 0)
{
puts ("cancel failed");
_exit (1);
}
void *r;
if (pthread_join (th, &r) != 0)
{
puts ("join failed");
_exit (1);
}
/* Exit successfully. */
_exit (0);
}
void
m (void)
{
if (pthread_create (&th, NULL, tf, NULL) != 0)
{
puts ("create failed");
_exit (1);
}
}