| 1 | /* $Id: tstDeadlock.cpp 4071 2007-08-07 17:07:59Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT Testcase - deadlock detection. Will never really "work".
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 innotek GmbH
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License as published by the Free Software Foundation,
|
|---|
| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
|
|---|
| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
|
|---|
| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 |
|
|---|
| 19 | /*******************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *******************************************************************************/
|
|---|
| 22 | #include <iprt/thread.h>
|
|---|
| 23 | #include <iprt/critsect.h>
|
|---|
| 24 | #include <iprt/stream.h>
|
|---|
| 25 | #include <iprt/err.h>
|
|---|
| 26 | #include <iprt/runtime.h>
|
|---|
| 27 |
|
|---|
| 28 |
|
|---|
| 29 | /*******************************************************************************
|
|---|
| 30 | * Global Variables *
|
|---|
| 31 | *******************************************************************************/
|
|---|
| 32 | static RTCRITSECT g_CritSect1;
|
|---|
| 33 | static RTCRITSECT g_CritSect2;
|
|---|
| 34 | static RTCRITSECT g_CritSect3;
|
|---|
| 35 |
|
|---|
| 36 | #define UNIT 250
|
|---|
| 37 |
|
|---|
| 38 | static DECLCALLBACK(int) Thread1(RTTHREAD ThreadSelf, void *pvUser)
|
|---|
| 39 | {
|
|---|
| 40 | RTCritSectEnter(&g_CritSect1);
|
|---|
| 41 | RTPrintf("thread1: got 1\n");
|
|---|
| 42 | RTThreadSleep(3*UNIT);
|
|---|
| 43 | RTPrintf("thread1: taking 2\n");
|
|---|
| 44 | RTCritSectEnter(&g_CritSect2);
|
|---|
| 45 | RTPrintf("thread1: got 2!!!\n");
|
|---|
| 46 | return VERR_DEADLOCK;
|
|---|
| 47 | }
|
|---|
| 48 |
|
|---|
| 49 | static DECLCALLBACK(int) Thread2(RTTHREAD ThreadSelf, void *pvUser)
|
|---|
| 50 | {
|
|---|
| 51 | RTCritSectEnter(&g_CritSect2);
|
|---|
| 52 | RTPrintf("thread2: got 2\n");
|
|---|
| 53 | RTThreadSleep(1*UNIT);
|
|---|
| 54 | RTPrintf("thread2: taking 3\n");
|
|---|
| 55 | RTCritSectEnter(&g_CritSect3);
|
|---|
| 56 | RTPrintf("thread2: got 3!!!\n");
|
|---|
| 57 | return VERR_DEADLOCK;
|
|---|
| 58 | }
|
|---|
| 59 |
|
|---|
| 60 | static DECLCALLBACK(int) Thread3(RTTHREAD ThreadSelf, void *pvUser)
|
|---|
| 61 | {
|
|---|
| 62 | RTCritSectEnter(&g_CritSect3);
|
|---|
| 63 | RTPrintf("thread3: got 3\n");
|
|---|
| 64 | RTThreadSleep(2*UNIT);
|
|---|
| 65 | RTPrintf("thread3: taking 1\n");
|
|---|
| 66 | RTCritSectEnter(&g_CritSect1);
|
|---|
| 67 | RTPrintf("thread1: got 1!!!\n");
|
|---|
| 68 | return VERR_DEADLOCK;
|
|---|
| 69 | }
|
|---|
| 70 |
|
|---|
| 71 |
|
|---|
| 72 | int main()
|
|---|
| 73 | {
|
|---|
| 74 | /*
|
|---|
| 75 | * Init.
|
|---|
| 76 | */
|
|---|
| 77 | RTR3Init();
|
|---|
| 78 | int rc = RTCritSectInit(&g_CritSect1);
|
|---|
| 79 | if (RT_SUCCESS(rc))
|
|---|
| 80 | rc = RTCritSectInit(&g_CritSect2);
|
|---|
| 81 | if (RT_SUCCESS(rc))
|
|---|
| 82 | rc = RTCritSectInit(&g_CritSect3);
|
|---|
| 83 | if (RT_FAILURE(rc))
|
|---|
| 84 | {
|
|---|
| 85 | RTPrintf("tstDeadlock: failed to initialize critsects: %Rra\n", rc);
|
|---|
| 86 | return 1;
|
|---|
| 87 | }
|
|---|
| 88 | RTCritSectEnter(&g_CritSect1);
|
|---|
| 89 | if (g_CritSect1.Strict.ThreadOwner == NIL_RTTHREAD)
|
|---|
| 90 | {
|
|---|
| 91 | RTPrintf("tstDeadlock: deadlock detection is not enabled in this build\n");
|
|---|
| 92 | return 1;
|
|---|
| 93 | }
|
|---|
| 94 | RTCritSectLeave(&g_CritSect1);
|
|---|
| 95 |
|
|---|
| 96 | /*
|
|---|
| 97 | * Start the threads and wait for them to deadlock.
|
|---|
| 98 | */
|
|---|
| 99 | RTPrintf("tstDeadlock: TESTING...\n");
|
|---|
| 100 | RTThreadYield();
|
|---|
| 101 | rc = RTThreadCreate(NULL, Thread1, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread1");
|
|---|
| 102 | if (RT_SUCCESS(rc))
|
|---|
| 103 | rc = RTThreadCreate(NULL, Thread2, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread2");
|
|---|
| 104 | if (RT_SUCCESS(rc))
|
|---|
| 105 | rc = RTThreadCreate(NULL, Thread3, NULL, 0, RTTHREADTYPE_DEFAULT, 0, "Thread3");
|
|---|
| 106 | if (RT_FAILURE(rc))
|
|---|
| 107 | {
|
|---|
| 108 | RTPrintf("tstDeadlock: failed to create threads: %Rra\n");
|
|---|
| 109 | return 1;
|
|---|
| 110 | }
|
|---|
| 111 | for (;;)
|
|---|
| 112 | RTThreadSleep(60000);
|
|---|
| 113 |
|
|---|
| 114 | RTPrintf("tstDeadlock: Impossible!!!\n");
|
|---|
| 115 | return 0;
|
|---|
| 116 | }
|
|---|
| 117 |
|
|---|
