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/* $NetBSD: t_swapcontext.c,v 1.3 2017/01/16 16:27:06 christos Exp $ */
/*
* Copyright (c) 2012 Emmanuel Dreyfus. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD");
#include <sys/types.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ucontext.h>
#include <atf-c.h>
#include "h_common.h"
#define STACKSIZE 65536
char stack[STACKSIZE];
ucontext_t nctx;
ucontext_t octx;
void *oself;
void *nself;
int val1, val2;
/* ARGSUSED0 */
static void
swapfunc(void *arg)
{
/*
* If the test fails, we are very likely to crash
* without the opportunity to report
*/
nself = (void *)pthread_self();
printf("after swapcontext self = %p\n", nself);
ATF_REQUIRE_EQ(oself, nself);
printf("Test succeeded\n");
/* Go back in main */
ATF_REQUIRE(swapcontext(&nctx, &octx));
/* NOTREACHED */
return;
}
/* ARGSUSED0 */
static void *
threadfunc(void *arg)
{
nctx.uc_stack.ss_sp = stack;
nctx.uc_stack.ss_size = sizeof(stack);
makecontext(&nctx, (void *)*swapfunc, 0);
oself = (void *)pthread_self();
printf("before swapcontext self = %p\n", oself);
ATF_REQUIRE_MSG(swapcontext(&octx, &nctx) != -1, "swapcontext failed: %s",
strerror(errno));
/* NOTREACHED */
return NULL;
}
ATF_TC(swapcontext1);
ATF_TC_HEAD(swapcontext1, tc)
{
atf_tc_set_md_var(tc, "descr", "Testing if swapcontext() "
"alters pthread_self()");
}
ATF_TC_BODY(swapcontext1, tc)
{
pthread_t thread;
oself = (void *)&val1;
nself = (void *)&val2;
printf("Testing if swapcontext() alters pthread_self()\n");
ATF_REQUIRE_MSG(getcontext(&nctx) != -1, "getcontext failed: %s",
strerror(errno));
PTHREAD_REQUIRE(pthread_create(&thread, NULL, threadfunc, NULL));
PTHREAD_REQUIRE(pthread_join(thread, NULL));
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, swapcontext1);
return atf_no_error();
}
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