120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
/***
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*unhandld.cxx - Wrapper to call terminate() when an exception goes unhandled.
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*
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* Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Wrapper to call terminate() when an exception goes unhandled.
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*
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*Description:
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* This module makes use of the Win32 API SetUnhandledExceptionFilter.
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* This assumes the call to main() is wrapped with
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* __try { ... }
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* __except(UnhandledExceptionFilter(_exception_info())) { ... }
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*
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*Revision History:
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* 10-04-93 BS Module created
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* 10-17-94 BWT Disable code for PPC.
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* 02-09-95 JWM Mac merge.
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* 02-16-95 JWM Added __CxxRestoreUnhandledExceptionFilter().
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* 11-19-96 GJF Install handler during C initializers, remove it
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* during C termination. Also, reformatted the source a
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* bit for readability.
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* 04-28-99 PML Wrap __declspec(allocate()) in _CRTALLOC macro.
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* 05-17-99 PML Remove all Macintosh support.
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* 03-27-01 PML .CRT$XI routines must now return 0 or _RT_* fatal
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* error code (vs7#231220)
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*
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****/
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#include <windows.h>
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#include <ehdata.h>
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#include <eh.h>
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#include <ehhooks.h>
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#include <ehassert.h>
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#include <internal.h>
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#include <stdlib.h>
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#pragma hdrstop
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#include <sect_attribs.h>
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int __cdecl __CxxSetUnhandledExceptionFilter(void);
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void __cdecl __CxxRestoreUnhandledExceptionFilter(void);
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#pragma data_seg(".CRT$XIY")
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_CRTALLOC(".CRT$XIY") static _PIFV pinit = &__CxxSetUnhandledExceptionFilter;
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#pragma data_seg(".CRT$XTB")
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_CRTALLOC(".CRT$XTB") static _PVFV pterm = &__CxxRestoreUnhandledExceptionFilter;
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#pragma data_seg()
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static LPTOP_LEVEL_EXCEPTION_FILTER pOldExceptFilter;
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/////////////////////////////////////////////////////////////////////////////
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//
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// __CxxUnhandledExceptionFilter - if the exception is ours, call terminate();
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//
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// Returns:
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// If the exception was MSVC C++ EH, does not return.
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// If the previous filter was NULL, returns EXCEPTION_CONTINUE_SEARCH.
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// Otherwise returns value returned by previous filter.
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//
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LONG WINAPI __CxxUnhandledExceptionFilter(
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LPEXCEPTION_POINTERS pPtrs
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)
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{
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if (PER_IS_MSVC_EH((EHExceptionRecord*)(pPtrs->ExceptionRecord))) {
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terminate(); // Does not return
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return EXCEPTION_EXECUTE_HANDLER;
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}
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else {
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#pragma warning(disable:4191)
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if ( pOldExceptFilter != NULL &&
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_ValidateExecute((FARPROC)pOldExceptFilter) )
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#pragma warning(default:4191)
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{
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return pOldExceptFilter(pPtrs);
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}
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else {
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return EXCEPTION_CONTINUE_SEARCH;
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}
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// __CxxSetUnhandledExceptionFilter - sets unhandled exception filter to be
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// __CxxUnhandledExceptionFilter.
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//
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// Returns:
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// Returns 0 to indicate no error.
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//
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int __cdecl __CxxSetUnhandledExceptionFilter(void)
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{
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pOldExceptFilter = SetUnhandledExceptionFilter(&__CxxUnhandledExceptionFilter);
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return 0;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// __CxxRestoreUnhandledExceptionFilter - on exit, restores OldExceptFilter
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//
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// Returns:
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// Nothing.
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//
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void __cdecl __CxxRestoreUnhandledExceptionFilter(void)
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{
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SetUnhandledExceptionFilter(pOldExceptFilter);
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}
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