| 1 | /* $Id: tstDeadlock.cpp 5999 2007-12-07 15:05:06Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT Testcase - deadlock detection. Will never really "work".
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 innotek GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*******************************************************************************
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| 29 | * Header Files *
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| 30 | *******************************************************************************/
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| 31 | #include <iprt/thread.h>
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| 32 | #include <iprt/critsect.h>
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| 33 | #include <iprt/stream.h>
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| 34 | #include <iprt/err.h>
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| 35 | #include <iprt/runtime.h>
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| 36 |
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| 37 |
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| 38 | /*******************************************************************************
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| 39 | * Global Variables *
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| 40 | *******************************************************************************/
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| 41 | static RTCRITSECT g_CritSect1;
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| 42 | static RTCRITSECT g_CritSect2;
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| 43 | static RTCRITSECT g_CritSect3;
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| 44 |
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| 45 | #define UNIT 250
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| 46 |
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| 47 | static DECLCALLBACK(int) Thread1(RTTHREAD ThreadSelf, void *pvUser)
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| 48 | {
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| 49 | RTCritSectEnter(&g_CritSect1);
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| 50 | RTPrintf("thread1: got 1\n");
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| 51 | RTThreadSleep(3*UNIT);
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| 52 | RTPrintf("thread1: taking 2\n");
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| 53 | RTCritSectEnter(&g_CritSect2);
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| 54 | RTPrintf("thread1: got 2!!!\n");
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| 55 | return VERR_DEADLOCK;
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| 56 | }
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| 57 |
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| 58 | static DECLCALLBACK(int) Thread2(RTTHREAD ThreadSelf, void *pvUser)
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| 59 | {
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| 60 | RTCritSectEnter(&g_CritSect2);
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| 61 | RTPrintf("thread2: got 2\n");
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| 62 | RTThreadSleep(1*UNIT);
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| 63 | RTPrintf("thread2: taking 3\n");
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| 64 | RTCritSectEnter(&g_CritSect3);
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| 65 | RTPrintf("thread2: got 3!!!\n");
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| 66 | return VERR_DEADLOCK;
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| 67 | }
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| 68 |
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| 69 | static DECLCALLBACK(int) Thread3(RTTHREAD ThreadSelf, void *pvUser)
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| 70 | {
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| 71 | RTCritSectEnter(&g_CritSect3);
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| 72 | RTPrintf("thread3: got 3\n");
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| 73 | RTThreadSleep(2*UNIT);
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| 74 | RTPrintf("thread3: taking 1\n");
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| 75 | RTCritSectEnter(&g_CritSect1);
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| 76 | RTPrintf("thread1: got 1!!!\n");
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| 77 | return VERR_DEADLOCK;
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| 78 | }
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| 79 |
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| 80 |
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| 81 | int main()
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| 82 | {
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| 83 | /*
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| 84 | * Init.
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| 85 | */
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| 86 | RTR3Init();
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| 87 | int rc = RTCritSectInit(&g_CritSect1);
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| 88 | if (RT_SUCCESS(rc))
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| 89 | rc = RTCritSectInit(&g_CritSect2);
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| 90 | if (RT_SUCCESS(rc))
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| 91 | rc = RTCritSectInit(&g_CritSect3);
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| 92 | if (RT_FAILURE(rc))
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| 93 | {
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| 94 | RTPrintf("tstDeadlock: failed to initialize critsects: %Rra\n", rc);
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| 95 | return 1;
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| 96 | }
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| 97 | RTCritSectEnter(&g_CritSect1);
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| 98 | if (g_CritSect1.Strict.ThreadOwner == NIL_RTTHREAD)
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| 99 | {
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| 100 | RTPrintf("tstDeadlock: deadlock detection is not enabled in this build\n");
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| 101 | return 1;
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| 102 | }
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| 103 | RTCritSectLeave(&g_CritSect1);
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| 104 |
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| 105 | /*
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| 106 | * Start the threads and wait for them to deadlock.
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| 107 | */
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| 108 | RTPrintf("tstDeadlock: TESTING...\n");
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| 109 | RTThreadYield();
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| 110 | rc = RTThreadCreate(NULL, Thread1, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread1");
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| 111 | if (RT_SUCCESS(rc))
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| 112 | rc = RTThreadCreate(NULL, Thread2, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread2");
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| 113 | if (RT_SUCCESS(rc))
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| 114 | rc = RTThreadCreate(NULL, Thread3, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread3");
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| 115 | if (RT_FAILURE(rc))
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| 116 | {
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| 117 | RTPrintf("tstDeadlock: failed to create threads: %Rra\n");
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| 118 | return 1;
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| 119 | }
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| 120 | for (;;)
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| 121 | RTThreadSleep(60000);
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| 122 |
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| 123 | RTPrintf("tstDeadlock: Impossible!!!\n");
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| 124 | return 0;
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| 125 | }
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| 126 |
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