glibc/nptl/tst-signal6.c

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/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <pthread.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define N 2
static pthread_barrier_t bar;
static struct
{
void *p;
pthread_t s;
} ti[N];
static int sig1;
static void
handler (int sig)
{
pthread_t self = pthread_self ();
size_t i;
for (i = 0; i < N; ++i)
if (ti[i].s == self)
{
if ((uintptr_t) ti[i].p <= (uintptr_t) &self
&& (uintptr_t) ti[i].p + 2 * MINSIGSTKSZ > (uintptr_t) &self)
{
puts ("alt stack not used");
exit (1);
}
printf ("thread %zu used alt stack for signal %d\n", i, sig);
return;
}
puts ("handler: thread not found");
exit (1);
}
static void *
tf (void *arg)
{
size_t nr = (uintptr_t) arg;
if (nr >= N)
{
puts ("wrong nr parameter");
exit (1);
}
sigset_t ss;
sigemptyset (&ss);
size_t i;
for (i = 0; i < N; ++i)
if (i != nr)
if (sigaddset (&ss, sig1 + i) != 0)
{
puts ("tf: sigaddset failed");
exit (1);
}
if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
{
puts ("tf: sigmask failed");
exit (1);
}
void *p = malloc (2 * MINSIGSTKSZ);
if (p == NULL)
{
puts ("tf: malloc failed");
exit (1);
}
stack_t s;
s.ss_sp = p;
s.ss_size = 2 * MINSIGSTKSZ;
s.ss_flags = 0;
if (sigaltstack (&s, NULL) != 0)
{
puts ("tf: sigaltstack failed");
exit (1);
}
ti[nr].p = p;
ti[nr].s = pthread_self ();
pthread_barrier_wait (&bar);
pthread_barrier_wait (&bar);
return NULL;
}
static int
do_test (void)
{
sig1 = SIGRTMIN;
if (sig1 + N > SIGRTMAX)
{
puts ("too few RT signals");
return 0;
}
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
if (sigaction (sig1, &sa, NULL) != 0
|| sigaction (sig1 + 1, &sa, NULL) != 0
|| sigaction (sig1 + 2, &sa, NULL) != 0)
{
puts ("sigaction failed");
return 1;
}
if (pthread_barrier_init (&bar, NULL, 1 + N) != 0)
{
puts ("barrier_init failed");
return 1;
}
pthread_t th[N];
size_t i;
for (i = 0; i < N; ++i)
if (pthread_create (&th[i], NULL, tf, (void *) (long int) i) != 0)
{
puts ("create failed");
return 1;
}
/* Block the three signals. */
sigset_t ss;
sigemptyset (&ss);
for (i = 0; i <= N; ++i)
sigaddset (&ss, sig1 + i);
if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
{
puts ("main: sigmask failed");
return 1;
}
pthread_barrier_wait (&bar);
/* Send some signals. */
pid_t me = getpid ();
kill (me, sig1 + N);
for (i = 0; i < N; ++i)
kill (me, sig1 + i);
kill (me, sig1 + N);
/* Give the signals a chance to be worked on. */
sleep (1);
pthread_barrier_wait (&bar);
for (i = 0; i < N; ++i)
if (pthread_join (th[i], NULL) != 0)
{
puts ("join failed");
return 1;
}
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"