73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/*
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* This file tests some of the basics of structured exception handling as
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* implemented in excpt.h and the Windows API header files.
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*
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* The program installs two exception handlers, then attempts to write to
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* a pointer to an invalid address. This causes an exception which passes
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* through the exception handlers and on to the default system exception
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* handler. That handler brings up the dialog box all Windows users know
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* and love, and then the program is terminated.
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*
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* You might note that after the initial run up through our exception frames
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* we get a second run up through them with the exception code
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* STATUS_INVALID_DISPOSITION and the code EH_UNWINDING. This seems normal
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* except that the code got changed from the previous STATUS_ACCESS_VIOLATION.
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* I don't understand that bit particularly.
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*/
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#include <stdio.h>
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#include <excpt.h>
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#include "exutil.h"
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EXCEPTION_DISPOSITION
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my_handler (
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struct _EXCEPTION_RECORD* pExceptionRec,
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void* pEstablisherFrame,
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struct _CONTEXT* pContextRecord,
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void* pDispatcherContext
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)
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{
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printf ("In my exception handler!\n");
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DumpExceptionRecord (pExceptionRec);
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return ExceptionContinueSearch;
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}
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EXCEPTION_DISPOSITION
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my_handler2 (
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struct _EXCEPTION_RECORD* pExceptionRec,
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void* pEstablisherFrame,
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struct _CONTEXT* pContextRecord,
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void* pDispatcherContext
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)
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{
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printf ("In top exception handler!\n");
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DumpExceptionRecord (pExceptionRec);
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return ExceptionContinueSearch;
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}
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main ()
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{
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char* x;
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printf ("my_handler2 = %08x\n", my_handler2);
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printf ("my_handler = %08x\n", my_handler);
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WalkExceptionHandlers();
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__try1(my_handler2)
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x = (char*) 10;
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WalkExceptionHandlers();
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__try1(my_handler)
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WalkExceptionHandlers();
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*x = 1;
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__except1
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__except1
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printf ("Finished!\n");
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}
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