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/* Test that __read_chk is a cancellation point (BZ #29274)
Copyright (C) 2022 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/>. */
#include <stdint.h>
#include <support/xunistd.h>
#include <support/xthread.h>
static int pipe_fds[2];
static pthread_barrier_t barrier;
static void *
read_thread (void *n)
{
xpthread_barrier_wait (&barrier);
char c;
/* This call should be forwarded to __read_chk because the buffer size
is known, but the read length is non-constant. */
if (read (pipe_fds[0], &c, (uintptr_t) n) != 1)
return (void *) -1L;
return 0;
}
static int
do_test (void)
{
xpthread_barrier_init (&barrier, 0, 2);
xpipe (pipe_fds);
pthread_t thr = xpthread_create (0, read_thread, (void *) 1L);
xpthread_barrier_wait (&barrier);
xpthread_cancel (thr);
xpthread_join (thr);
return 0;
}
#include <support/test-driver.c>
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