{"id":835,"date":"2014-10-09T22:02:09","date_gmt":"2014-10-09T14:02:09","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=835"},"modified":"2014-10-10T11:31:14","modified_gmt":"2014-10-10T03:31:14","slug":"%e5%a4%9a%e7%ba%bf%e7%a8%8b%e7%bc%96%e7%a8%8b%e4%b8%ad%e6%ad%bb%e9%94%81%e9%97%ae%e9%a2%98%e7%9a%84%e8%b7%9f%e8%b8%aa%e4%b8%8e%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=835","title":{"rendered":"\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\u6b7b\u9501\u95ee\u9898\u7684\u8ddf\u8e2a\u4e0e\u89e3\u51b3"},"content":{"rendered":"

\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\uff0c\u7531\u4e8e\u9700\u8981\u540c\u6b65\u5bf9\u8c61\u7684\u8bbf\u95ee\uff0c\u7a0d\u6709\u4e0d\u614e\uff0c\u5c31\u53ef\u80fd\u9020\u6210\u6b7b\u9501\u3002\u800c\u7ebf\u7a0b\u6b7b\u9501\u7684\u8ddf\u8e2a\u8c03\u8bd5\u5206\u6790\u662f\u4e00\u4ef6\u5f88\u8ba9\u4eba\u7ea0\u845b\u7684\u4e8b\u60c5\uff0c\u5982\u4f55\u8ddf\u8e2a\u6b7b\u9501\u662f\u4e00\u4ef6\u5f88\u8ba9\u4eba\u95f9\u5fc3\u7684\u4e8b\u3002\u5728Vista\/Server2008\u53ca\u4ee5\u540e\u7684\u7248\u672c\uff0cWindows\u63d0\u4f9b\u4e86OpenThreadWaitChainSession\u7b49\u4e00\u7cfb\u5217\u51fd\u6570\uff08Wait Chain Traversal\uff0cWCT\uff09\u53ef\u4ee5\u83b7\u53d6\u540c\u6b65\u5bf9\u8c61\u7684\u7b49\u5f85\u72b6\u6001\uff0c\u5982\u679c\u5728IDE\u8c03\u8bd5\u65f6\u51fa\u73b0\u95ee\u9898\uff0cDelphi\u7684Threads\u53ef\u4ee5\u770b\u5230\u76f8\u5e94\u7684\u540c\u6b65\u5bf9\u8c61\u7b49\u5f85\u72b6\u6001\u53ca\u5404\u4e2a\u7ebf\u7a0b\u7684\u5806\u6808\uff0c\u4f46\u8fd9\u79cd\u95ee\u9898\u5f80\u5f80\u9700\u8981\u5728\u7279\u5b9a\u60c5\u51b5\u4e0b\u624d\u80fd\u51fa\u73b0\uff0c\u8c03\u8bd5\u5f88\u56f0\u96be\u3002\u800c\u5728\u8fd0\u884c\u65f6\uff0c\u7531\u4e8eDelphi\u548cC++ Builder\u5e76\u6ca1\u6709\u63d0\u4f9b\u76f8\u5e94\u7684\u5c01\u88c5\uff0c\u9020\u6210\u6211\u4eec\u5f88\u96be\u8ddf\u8e2a\u51fa\u95ee\u9898\u65f6\u7684\u72b6\u6001\u3002\u4e3a\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\uff0cQDAC\u4e3a\u5927\u5bb6\u63d0\u4f9bQMapSymbols\u5355\u5143\u4ee5\u63d0\u4f9b\u76f8\u5173\u7684\u652f\u6301\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u8981\u68c0\u6d4b\u662f\u5426\u53d1\u751f\u6b7b\u9501\u3002<\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u68c0\u6d4b\u6b7b\u9501\u4e00\u79cd\u662f\u4eba\u4e3a\u68c0\u6d4b\uff0c\u5728\u53d1\u751f\u6b7b\u9501\u65f6\uff0c\u5982\u679c\u662f\u4e3b\u7ebf\u7a0b\u4e0e\u540e\u53f0\u7ebf\u7a0b\u53d1\u51b2\u7a81\uff0c\u7a0b\u5e8f\u4f1a\u505c\u6b62\u54cd\u5e94\u3002\u5982\u679c\u662f\u540e\u53f0\u7ebf\u7a0b\u4e4b\u95f4\u53d1\u751f\u6b7b\u9501\uff0c\u5219\u540e\u53f0\u76f8\u5173\u7684\u4f5c\u4e1a\u4f1a\u505c\u6b62\u6267\u884c\uff0c\u7a0b\u5e8f\u901a\u8fc7\u65e5\u5fd7\u7b49\u9014\u5f84\u53ef\u4ee5\u67e5\u770b\u5230\u76f8\u5173\u7684\u72b6\u6001\uff0c\u4ece\u800c\u786e\u5b9a\u662f\u53d1\u751f\u4e86\u6b7b\u9501\u3002<\/p>\n

\u65b9\u6cd5\u4e8c\uff1a\u901a\u8fc7\u540e\u53f0\u7ebf\u7a0b\u68c0\u6d4b\u662f\u5426\u53d1\u751f\u6b7b\u9501\u3002\u901a\u8fc7\u5f00\u542f\u4e00\u4e2a\u540e\u53f0\u7ebf\u7a0b\uff0c\u4f7f\u7528WCT\u51fd\u6570\u68c0\u67e5\u662f\u5426\u53d1\u751f\u6b7b\u9501\u3002<\/p>\n

\u4e0b\u4e00\u6b65\uff0c\u53d1\u751f\u6b7b\u9501\u65f6\uff0c\u6211\u4eec\u8981\u505a\u4e24\u4ef6\u4e8b\u3002<\/p>\n

\u4e00\u3001\u60f3\u529e\u6cd5\u8bb0\u5f55\u5404\u4e2a\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f\u5230\u65e5\u5fd7\uff0c\u4ee5\u4fbf\u8fdb\u4e00\u6b65\u8ddf\u8e2a\u95ee\u9898\u53d1\u751f\u7684\u6765\u6e90\uff0c\u627e\u5230\u51b2\u7a81\u7684\u4ee3\u7801\u3002<\/p>\n

\u4e8c\u3001\u901a\u8fc7WCT\u51fd\u6570\u627e\u5230\u51fa\u95ee\u9898\u7684\u5bf9\u8c61\u7c7b\u578b\u548c\u53d1\u751f\u51b2\u7a81\u7684\u7ebf\u7a0b\uff0c\u5e76\u5c06\u5176\u4fe1\u606f\u8bb0\u5f55\u5230\u65e5\u5fd7\uff0c\u7ed3\u5408\u4e0a\u9762\u8bb0\u5f55\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\uff0c\u5c31\u53ef\u4ee5\u660e\u786e\u7684\u627e\u5230\u51fa\u73b0\u6b7b\u9501\u95ee\u9898\u7684\u5806\u6808\u8c03\u7528\u3002<\/p>\n

\u6700\u540e\u4e00\u6b65\uff0c\u5c31\u662f\u6839\u636e\u65e5\u5fd7\u4e2d\u7684\u5806\u6808\u4fe1\u606f\uff0c\u4fee\u6539\u7a0b\u5e8f\u7684\u4ee3\u7801\uff0c\u907f\u514d\u51b2\u7a81\u7684\u53d1\u751f\u3002<\/p>\n

QMapSymbols\u76ee\u524d\u5c01\u88c5\u4e86WCT\u51fd\u6570\u5e76\u63d0\u4f9b\u4e86\u51e0\u4e2a\u7b80\u5355\u7684\u5c01\u88c5\uff1a<\/p>\n

1\u3001\u901a\u8fc7EnumWaitChains\u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u7684\u5217\u4e3e\u51fa\u5404\u4e2a\u7ebf\u7a0b\u7684\u7b49\u5f85\u72b6\u6001\uff1b\u5982\u679c\u51fa\u73b0\u6b7b\u9501\uff0c\u4f1a\u76f4\u63a5\u6253\u5370\u8f93\u51fa\u76f8\u5e94\u7684\u7ebf\u7a0b\u7684\u5806\u6808\u4fe1\u606f\u3002<\/p>\n

2\u3001StackByThreadId\/StackByThreadHandle\/StackOfThread\u4e09\u79cd\u91cd\u8f7d\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u83b7\u53d6\u7ebf\u7a0b\u5806\u6808\u7684\u9014\u5f84\uff0c\u7a0b\u5e8f\u968f\u65f6\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e09\u4e2a\u51fd\u6570\u67e5\u8be2\u4efb\u610f\u7ebf\u7a0b\uff08\u5305\u542b\u8c03\u7528\u7ebf\u7a0b\u81ea\u8eab\uff09\u7684\u5806\u6808\u4fe1\u606f\u3002\u8fd9\u4e00\u7ec4\u51fd\u6570\u4e0d\u9700\u8981Windows Vista\/2008\u4ee5\u4e0a\u64cd\u4f5c\u7cfb\u7edf\u652f\u6301\u3002<\/p>\n

3\u3001\u7a0b\u5e8f\u53ef\u4ee5\u8c03\u7528\u51fd\u6570EnableDeadlockCheck\u6765\u542f\u7528\u6b7b\u9501\u68c0\u6d4b\u3002<\/p>\n

\u524d\u9762\u8bf4\u4e86\u5728Vista\/Server 2008\u4ee5\u540e\u7684\u7248\u672c\u624d\u63d0\u4f9b\u4e86WCT\u51fd\u6570\uff0c\u90a3\u4e48\uff0c\u5982\u679c\u5728\u65e9\u671f\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e0a\uff0c\u6211\u4eec\u5982\u4f55\u6765\u8ddf\u8e2a\u6b7b\u9501\u7684\u95ee\u9898\u5462\uff1f<\/p>\n

\u9996\u5148\uff0c\u68c0\u6d4b\u6b7b\u9501\u7684\u529e\u6cd5\u6211\u4eec\u5c31\u4e0d\u5f97\u4e0d\u505a\u4e00\u4e9b\u6539\u53d8\u3002\u5728\u53d1\u751f\u6b7b\u9501\u65f6\uff0c\u9664\u4e86\u4eba\u4e3a\u68c0\u6d4b\u5916\uff0c\u7531\u4e8e\u51b2\u7a81\u7684\u7ebf\u7a0b\u7684\u5806\u6808\u4f1a\u88ab\u5904\u4e8e\u540c\u6b65\u7b49\u5f85\u72b6\u6001\u800c\u65e0\u6cd5\u7ee7\u7eed\u6267\u884c\uff0c\u6211\u4eec\u53ef\u4ee5\u68c0\u67e5\u7ebf\u7a0b\u7684\u5f53\u524d\u6267\u884c\u7684\u6307\u4ee4\u5bc4\u5b58\u5668\u7684\u503c\u662f\u5426\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u53d1\u751f\u53d8\u5316\uff0c\u6765\u505a\u4e3a\u662f\u5426\u53d1\u751f\u6b7b\u9501\u7684\u5224\u5b9a\u4f9d\u636e\u3002<\/p>\n

\u63a5\u4e0b\u6765\u5728\u53d1\u751f\u6b7b\u9501\u65f6\uff0c\u4e00\u6837\u53ef\u4ee5\u901a\u8fc7\u5806\u6808\u6765\u627e\u5230\u7ebf\u7a0b\u51b2\u7a81\u7684\u4ee3\u7801\uff0c\u53ea\u662f\u65e0\u6cd5\u76f4\u89c2\u7684\u5224\u65ad\u53d1\u751f\u6b7b\u9501\u7684\u540c\u6b65\u5bf9\u8c61\u7c7b\u578b\uff0c\u4f46\u4e00\u822c\u5230\u8fd9\u4e00\u6b65\uff0c\u627e\u5230\u5404\u4e2a\u7ebf\u7a0b\u5806\u6808\u540e\uff0c\u8981\u627e\u5230\u51fa\u9519\u7684\u4ee3\u7801\u4f4d\u7f6e\u5e76\u4e0d\u96be\uff0c\u7136\u540e\u7ed3\u5408\u4e0a\u4e0b\u6587\u5206\u6790\uff0c\u4e00\u6837\u53ef\u4ee5\u4fbf\u6377\u7684\u5b9a\u4f4d\u51fa\u51b2\u7a81\u4f4d\u7f6e\u5e76\u505a\u51fa\u5fc5\u8981\u7684\u4fee\u6b63\u3002<\/p>\n

\u3010\u793a\u4f8b\u3011<\/p>\n

\u4e3a\u4e86\u6f14\u793a\u6b7b\u9501\u53ca\u7b49\u5f85\u961f\u5217\u7684\u6548\u679c\uff0c\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a\u7ebf\u7a0b\u7c7b\uff0c\u8fd9\u4e2a\u7ebf\u7a0b\u7c7b\u5c1d\u8bd5\u5148\u540e\u8fdb\u5165\u4e24\u4e2a\u4e34\u754c\u3002<\/p>\n

procedure TDeadLockThread.Execute;\r\nbegin\r\ninherited;\r\nFCS1.Enter; \r\nSleep(10);\r\nFCS2.Enter;\r\nend;<\/pre>\n
\u800c\u540e\uff0c\u6211\u4eec\u521b\u5efa\u4e24\u4e2a\u4e0d\u540c\u7684\u7ebf\u7a0b\uff0c\u5e76\u5206\u522b\u5c06\u4e24\u4e2a\u4e34\u754c\u5bf9\u8c61\u4ee5\u4e0d\u540c\u7684\u987a\u5e8f\u8d4b\u7ed9\u7ebf\u7a0b\uff0c\u4ee5\u4fbf\u6a21\u62df\u6b7b\u9501\u51b2\u7a81\uff1a<\/p>\n
  CS1 := TCriticalSection.Create;\r\n  CS2 := TCriticalSection.Create;\r\n  \/\/ \u907f\u514d\u7ebf\u7a0b\u5148\u8fdb\u5165\r\n  CS1.Enter;\r\n  CS2.Enter;\r\n  AThread1 := TDeadLockThread.Create(True);\r\n  AThread1.FCS1 := CS1;\r\n  AThread1.FCS2 := CS2;\r\n  AThread1.Resume;\r\n  AThread2 := TDeadLockThread.Create(True);\r\n  AThread2.FCS1 := CS2;\r\n  AThread2.FCS2 := CS1;\r\n  AThread2.Resume;\r\n  CS1.Leave;\r\n  CS2.Leave;\r\n  Sleep(100);\r\n<\/pre>\n
\u73b0\u5728\uff0c\u6b7b\u9501\u5df2\u7ecf\u88ab\u89e6\u53d1\u4e86\uff0c\u7531\u4e8e\u4e24\u4e2a\u7ebf\u7a0b\u5206\u522b\u8bf7\u6c42\u8fdb\u5165\u5bf9\u65b9\u5df2\u7ecf\u8fdb\u5165\u7684\u4e34\u754c\uff0c\u4ece\u800c\u5f15\u53d1\u4e86\u6b7b\u9501\u3002\u6b64\u65f6\uff0c\u6211\u4eec\u8c03\u7528\u00a0EnumWaitChains\u51fd\u6570\uff0c\u5c31\u4f1a\u5f97\u5230\u5f53\u524d\u5404\u4e2a\u7ebf\u7a0b\u7684\u7b49\u5f85\u72b6\u6001\uff0c\u7b80\u5355\u7684ShowMessage\u663e\u793a\u4e0b\uff1a<\/p>\n
ShowMessage(EnumWaitChains);<\/pre>\n
\"deadlockwaitchain\"<\/a><\/p>\n
\u5982\u679c\u6211\u4eec\u5728\u7a0b\u5e8f\u8c03\u7528EnableDeadlockCheck\u51fd\u6570\uff0c\u5219\u7a0b\u5e8f\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u65e5\u5fd7\uff0c\u8bb0\u5f55\u6b7b\u9501\u60c5\u51b5\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u5177\u4f53\u4e0a\u9762\u7684\u4f8b\u5b50\u7684\u7ed3\u679c\uff1a<\/p>\n
\u7ebf\u7a0b 5144\r\n !!!\u5df2\u6b7b\u9501!!! \r\n \u7ebf\u7a0b 5144 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n\r\n CriticalSection <\u7b49\u5f85\u4e2d> \r\n \u7ebf\u7a0b 7364 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n\r\n CriticalSection <\u7b49\u5f85\u4e2d> \r\n \u7ebf\u7a0b 5144 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n\r\n\u7ebf\u7a0b 7364\r\n !!!\u5df2\u6b7b\u9501!!! \r\n \u7ebf\u7a0b 7364 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n\r\n CriticalSection <\u7b49\u5f85\u4e2d> \r\n \u7ebf\u7a0b 5144 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n\r\n CriticalSection <\u7b49\u5f85\u4e2d> \r\n \u7ebf\u7a0b 7364 <\u8fd0\u884c\u4e2d> \r\n[\u5806\u6808]\r\nntdll.dll.76F2CD7C\r\nntdll.dll.76F0EB9F\r\nntdll.dll.76F0EBCD\r\n0050E2F6 System.SyncObjs.pas[1023]:System.SyncObjs.TCriticalSection.Acquire\r\n004C0B22 System.Classes.pas[14161]:System.Classes.ThreadProc\r\n0040919C System.pas[23671]:System.ThreadWrapper\r\n74D39199 C:\\WINDOWS\\SYSTEM32\\KERNEL32.DLL:GetCurrentThread\r\nntdll.dll.76F3A22B\r\nntdll.dll.76F3A201\r\n<\/pre>\n
 <\/p>\n
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