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