tstDeadlock.cpp revision a2b66e2b8b92cf2d0706078798036035cb9fa94d
/* $Id$ */
/** @file
* IPRT Testcase - deadlock detection. Will never really "work".
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/asm.h> /* for return addresses */
#include <iprt/critsect.h>
#include <iprt/lockvalidator.h>
#include <iprt/err.h>
#include <iprt/initterm.h>
#include <iprt/stream.h>
#include <iprt/thread.h>
/*******************************************************************************
* Global Variables *
*******************************************************************************/
static RTCRITSECT g_CritSect1;
static RTCRITSECT g_CritSect2;
static RTCRITSECT g_CritSect3;
#define UNIT 250
static DECLCALLBACK(int) Thread1(RTTHREAD ThreadSelf, void *pvUser)
{
RTCritSectEnter(&g_CritSect1);
RTPrintf("thread1: got 1\n");
RTThreadSleep(3*UNIT);
RTPrintf("thread1: taking 2\n");
RTCritSectEnter(&g_CritSect2);
RTPrintf("thread1: got 2!!!\n");
return VERR_DEADLOCK;
}
static DECLCALLBACK(int) Thread2(RTTHREAD ThreadSelf, void *pvUser)
{
RTCritSectEnter(&g_CritSect2);
RTPrintf("thread2: got 2\n");
RTThreadSleep(1*UNIT);
RTPrintf("thread2: taking 3\n");
RTCritSectEnter(&g_CritSect3);
RTPrintf("thread2: got 3!!!\n");
return VERR_DEADLOCK;
}
static DECLCALLBACK(int) Thread3(RTTHREAD ThreadSelf, void *pvUser)
{
RTCritSectEnter(&g_CritSect3);
RTPrintf("thread3: got 3\n");
RTThreadSleep(2*UNIT);
RTPrintf("thread3: taking 1\n");
RTCritSectEnter(&g_CritSect1);
RTPrintf("thread3: got 1!!!\n");
return VERR_DEADLOCK;
}
int main()
{
/*
* Init.
*/
RTR3Init();
int rc = RTCritSectInit(&g_CritSect1);
if (RT_SUCCESS(rc))
rc = RTCritSectInit(&g_CritSect2);
if (RT_SUCCESS(rc))
rc = RTCritSectInit(&g_CritSect3);
if (RT_FAILURE(rc))
{
RTPrintf("tstDeadlock: failed to initialize critsects: %Rra\n", rc);
return 1;
}
RTCritSectEnter(&g_CritSect1);
if (!g_CritSect1.pValidatorRec || g_CritSect1.pValidatorRec->hThread == NIL_RTTHREAD)
{
RTPrintf("tstDeadlock: deadlock detection is not enabled in this build\n");
return 1;
}
RTCritSectLeave(&g_CritSect1);
/*
* Start the threads and wait for them to deadlock.
*/
RTPrintf("tstDeadlock: TESTING...\n");
RTThreadYield();
rc = RTThreadCreate(NULL, Thread1, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread1");
if (RT_SUCCESS(rc))
rc = RTThreadCreate(NULL, Thread2, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread2");
if (RT_SUCCESS(rc))
rc = RTThreadCreate(NULL, Thread3, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread3");
if (RT_FAILURE(rc))
{
RTPrintf("tstDeadlock: failed to create threads: %Rra\n");
return 1;
}
for (;;)
RTThreadSleep(60000);
RTPrintf("tstDeadlock: Impossible!!!\n");
return 0;
}