[webkit-help] Help: how to implement CFRunLoop logic on Windows Webkit version 157099

[houzhe at sohu.com]

Hi, Brent, thanks for your response! Because debug information is missed in WebKitSystemInterface.lib, I cannot dump the detail information of calling stack of WinLaucher. I compiled WebKit on 64bit system, and I fould following error messages in Output window when the exception was thrown: ERROR !!! HeapSetInformation failed to set g_Heap to LFHERROR !!! HeapSetInformation failed to set g_SpyHeap to LFHbut I don't know whether they mean the root cause. The exception is raise after the callback function is called/returned, as I already saw the callback function's output when the application crashed. Just for your information that bellow is the analyze information of the exception. ********************************************************************************                                                                             **                        Exception Analysis                                   **                                                                             *********************************************************************************** ERROR: Symbol file could not be found.  Defaulted to export symbols for libdispatch.dll - *** ERROR: Symbol file could not be found.  Defaulted to export symbols for CoreFoundation.dll - *** ERROR: Symbol file could not be found.  Defaulted to export symbols for pthreadVC2.dll - FAULTING_IP: ntdll! ?? ::FNODOBFM::`string'+4779770ee 6f              outs    dx,dword ptr [esi]EXCEPTION_RECORD:  ffffffff -- (.exr 0xffffffffffffffff)ExceptionAddress: 779770ee (ntdll! ?? ::FNODOBFM::`string'+0x00000004)   ExceptionCode: c0000096  ExceptionFlags: 00000000NumberParameters: 0PROCESS_NAME:  WinLauncher.exeERROR_CODE: (NTSTATUS) 0xc0000096 - {EXCEPTION}  Privileged instruction.EXCEPTION_CODE: (NTSTATUS) 0xc0000096 - {EXCEPTION}  Privileged instruction.DEFAULT_BUCKET_ID:  INVALID_POINTER_READAPP:  winlauncher.exeFAULTING_THREAD:  00003618PRIMARY_PROBLEM_CLASS:  INVALID_POINTER_READBUGCHECK_STR:  APPLICATION_FAULT_INVALID_POINTER_READLAST_CONTROL_TRANSFER:  from 10003eae to 779770eeSTACK_TEXT:  000cf978 10003eae 00000000 c1236e93 41b806ae ntdll! ?? ::FNODOBFM::`string'+0x4WARNING: Stack unwind information not available. Following frames may be wrong.000cfae4 004013d0 00400000 00000000 00242b64 WinLauncher_10000000!dllLauncherEntryPoint+0x9ae000cfef0 004037d7 00400000 00000000 00242b64 WinLauncher!wWinMain+0x3d0000cff84 75738543 7ffde000 000cffd4 7798bf39 WinLauncher!__tmainCRTStartup+0x158000cff90 7798bf39 7ffde000 2e5f7adb 00000000 kernel32!BaseThreadInitThunk+0xe000cffd4 7798bf0c 0040390a 7ffde000 ffffffff ntdll!__RtlUserThreadStart+0x72000cffec 00000000 0040390a 7ffde000 00000000 ntdll!_RtlUserThreadStart+0x1bIf you have any ideas, please let me know. Thanks a lot in advance!Best regards, Zhe ----- 原文 ----- 发件人: Brent Fulgham 主　题: Re: [webkit-help] Help: how to implement CFRunLoop logic on Windows Webkit version 157099时　间: 2013年10月10日  11:30:08抄　送: webkit-help,  Hi Zhe,You can see how the various CoreFoundation types are used in some of the CFLite examples I posted to my GitHub account (e.g., https://github.com/bfulgham/WinCairoRequirements/tree/master/src/opencflite/examples/CFRunLoopTimerExample).I'm not sure I understand what you mean when you say "Everytime, when 'tick' function is called, there is an exception raised".  Can you show the callstack at the time the exception is generated?Do you mean that the exception is thrown at the time the tick should have fired, before you enter your 'tick' function? Or is it called when you return from the call?Thanks,-BrentOn Oct 9, 2013, at 5:28 AM, houzhe at sohu.com wrote:I am trying to add some CFRunLoop logic in WinLauncher.cpp on Windows Webkit version 157099. There always are exceptions raised. My codes look like this: // callback functionvoid tick(CFRunLoopTimerRef timer, void *info) {	Logger::Instance()->WriteLog("I am going to dump DOM tree now. Tick...");}extern "C" __declspec(dllexport) int WINAPI dllLauncherEntryPoint(HINSTANCE, HINSTANCE, LPTSTR, int nCmdShow){// no change until around following line// Main message loop:    __try {#if USE(CF)		// my codes start		CFRunLoopTimerContext ctx;					CFRunLoopTimerRef timer = 			CFRunLoopTimerCreate(NULL, 					 CFAbsoluteTimeGetCurrent() + 10.0,					 0, 					 0, 					 0, 					 tick,					 &ctx);		CFRunLoopAddTimer(CFRunLoopGetMain(), timer, kCFRunLoopCommonModes);		// my codes end#endif        while (GetMessage(&msg, 0, 0, 0)) {#if USE(CF)            CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0, true);#endif            if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) {                TranslateMessage(&msg);                DispatchMessage(&msg);            }        }    } __except(createCrashReport(GetExceptionInformation()), EXCEPTION_EXECUTE_HANDLER) { }exit:    gPrintDelegate->Release();    // other codes without change}Everytime, when 'tick' function is called, there is an exception raised. As no debug information is in WebKitSystemInterface.lib, I cannot trace the program line by line either. Can anybody let me know how shall I implement the logic? Thanks, Zhe--------------------------------专业的邮件发送服务 SendCloud
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