Microsoft KB Archive/77987

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Debugging GP Faults with WDEB386

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Q77987

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1

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SUMMARY
Under certain circumstances, trying to trap GP (general protection) faults with WDEB386 may produce unexpected results.

In general, if the processor generates a GP fault while a Windows-based application is running, the GP-fault handler will automatically provide the mechanism to stop at the offending instruction in WDEB386. However, unexpected results (breaking at unusual locations, infinite loops, debugger crashes) may occur under WDEB386 if one of the following conditions is true:


 * The GP fault occurs somewhere other than in a Windows-based application or dynamic-link library (DLL).
 * The WIN.INI file [kernel] section switch DisableGPTrapping is set to 1.

Additional query words:

Keywords : kb16bitonly

Issue type : kbhowto

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310