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[MinGW-cvs] runtime/samples/seh eh3.c,1.1.1.1,1.2 exutil.c,1.1.1.1,1.2 exutil.def,1.1.1.1,1.2 exutil.h,1.1.1.1,1.2 jamfile,1.1.1.1,1.2 sehfix.c,1.1.1.1,1.2 sehsub.c,1.1.1.1,1.2 sehtest.c,1.1.1.1,1.2
Update of /cvsroot/mingw/runtime/samples/seh
In directory usw-pr-cvs1:/tmp/cvs-serv1023/samples/seh
Modified Files:
eh3.c exutil.c exutil.def exutil.h jamfile sehfix.c sehsub.c
sehtest.c
Log Message:
Convert some text files to Unix format
Index: eh3.c
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/eh3.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** eh3.c 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- eh3.c 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,112 ****
! int
! __except_handler3(
! struct _EXCEPTION_RECORD* pExceptionRecord,
! struct EXCEPTION_REGISTRATION* pRegistrationFrame,
! struct _CONTEXT* pContextRecord,
! void* pDispatcherContext
! )
! {
! LONG filterFuncRet;
! LONG trylevel;
! EXCEPTION_POINTERS exceptPtrs;
! PSCOPETABLE pScopeTable;
!
!
! CLD // Clear the direction flag (make no assumptions!)
!
! // if neither the EXCEPTION_UNWINDING nor EXCEPTION_EXIT_UNWIND bit
! // is set... This is true the first time through the handler (the
! // non-unwinding case)
!
! if ( ! (pExceptionRecord->ExceptionFlags
! & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND)
! ) )
! {
! // Build the EXCEPTION_POINTERS structure on the stack
! exceptPtrs.ExceptionRecord = pExceptionRecord;
! exceptPtrs.ContextRecord = pContextRecord;
!
! // Put the pointer to the EXCEPTION_POINTERS 4 bytes below the
! // establisher frame. See ASM code for GetExceptionInformation
! *(PDWORD)((PBYTE)pRegistrationFrame - 4) = &exceptPtrs;
!
! // Get initial "trylevel" value
! trylevel = pRegistrationFrame->trylevel
!
! // Get a pointer to the scopetable array
! scopeTable = pRegistrationFrame->scopetable;
!
! search_for_handler:
! if ( pRegistrationFrame->trylevel != TRYLEVEL_NONE )
! {
! if ( pRegistrationFrame->scopetable[trylevel].lpfnFilter )
! {
!
! PUSH EBP // Save this frame EBP
!
! // !!!Very Important!!! Switch to original EBP. This is
! // what allows all locals in the frame to have the same
! // value as before the exception occurred.
!
! EBP = &pRegistrationFrame->_ebp
!
! // Call the filter function
! filterFuncRet = scopetable[trylevel].lpfnFilter();
!
! POP EBP // Restore handler frame EBP
!
! if ( filterFuncRet != EXCEPTION_CONTINUE_SEARCH )
! {
! if ( filterFuncRet < 0 ) // EXCEPTION_CONTINUE_EXECUTION
! return ExceptionContinueExecution;
!
! // If we get here, EXCEPTION_EXECUTE_HANDLER was specified
! scopetable == pRegistrationFrame->scopetable
!
! // Does the actual OS cleanup of registration frames
! // Causes this function to recurse
! __global_unwind2( pRegistrationFrame );
!
!
! // Once we get here, everything is all cleaned up, except
! // for the last frame, where we'll continue execution
! EBP = &pRegistrationFrame->_ebp
!
! __local_unwind2( pRegistrationFrame, trylevel );
!
! // NLG == "non-local-goto" (setjmp/longjmp stuff)
! __NLG_Notify( 1 ); // EAX == scopetable->lpfnHandler
!
! // Set the current trylevel to whatever SCOPETABLE entry
! // was being used when a handler was found
! pRegistrationFrame->trylevel = scopetable->previousTryLevel;
!
! // Call the _except {} block. Never returns.
! pRegistrationFrame->scopetable[trylevel].lpfnHandler();
! }
! }
!
! scopeTable = pRegistrationFrame->scopetable;
! trylevel = scopeTable->previousTryLevel
!
! goto search_for_handler;
! }
! else // trylevel == TRYLEVEL_NONE
! {
! retvalue == DISPOSITION_CONTINUE_SEARCH;
! }
! }
! else // EXCEPTION_UNWINDING or EXCEPTION_EXIT_UNWIND flags are set
! {
! PUSH EBP // Save EBP
!
! EBP = pRegistrationFrame->_ebp // Set EBP for __local_unwind2
!
! __local_unwind2( pRegistrationFrame, TRYLEVEL_NONE )
!
! POP EBP // Restore EBP
!
! retvalue == DISPOSITION_CONTINUE_SEARCH;
! }
! }
!
--- 1,112 ----
! int
! __except_handler3(
! struct _EXCEPTION_RECORD* pExceptionRecord,
! struct EXCEPTION_REGISTRATION* pRegistrationFrame,
! struct _CONTEXT* pContextRecord,
! void* pDispatcherContext
! )
! {
! LONG filterFuncRet;
! LONG trylevel;
! EXCEPTION_POINTERS exceptPtrs;
! PSCOPETABLE pScopeTable;
!
!
! CLD // Clear the direction flag (make no assumptions!)
!
! // if neither the EXCEPTION_UNWINDING nor EXCEPTION_EXIT_UNWIND bit
! // is set... This is true the first time through the handler (the
! // non-unwinding case)
!
! if ( ! (pExceptionRecord->ExceptionFlags
! & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND)
! ) )
! {
! // Build the EXCEPTION_POINTERS structure on the stack
! exceptPtrs.ExceptionRecord = pExceptionRecord;
! exceptPtrs.ContextRecord = pContextRecord;
!
! // Put the pointer to the EXCEPTION_POINTERS 4 bytes below the
! // establisher frame. See ASM code for GetExceptionInformation
! *(PDWORD)((PBYTE)pRegistrationFrame - 4) = &exceptPtrs;
!
! // Get initial "trylevel" value
! trylevel = pRegistrationFrame->trylevel
!
! // Get a pointer to the scopetable array
! scopeTable = pRegistrationFrame->scopetable;
!
! search_for_handler:
! if ( pRegistrationFrame->trylevel != TRYLEVEL_NONE )
! {
! if ( pRegistrationFrame->scopetable[trylevel].lpfnFilter )
! {
!
! PUSH EBP // Save this frame EBP
!
! // !!!Very Important!!! Switch to original EBP. This is
! // what allows all locals in the frame to have the same
! // value as before the exception occurred.
!
! EBP = &pRegistrationFrame->_ebp
!
! // Call the filter function
! filterFuncRet = scopetable[trylevel].lpfnFilter();
!
! POP EBP // Restore handler frame EBP
!
! if ( filterFuncRet != EXCEPTION_CONTINUE_SEARCH )
! {
! if ( filterFuncRet < 0 ) // EXCEPTION_CONTINUE_EXECUTION
! return ExceptionContinueExecution;
!
! // If we get here, EXCEPTION_EXECUTE_HANDLER was specified
! scopetable == pRegistrationFrame->scopetable
!
! // Does the actual OS cleanup of registration frames
! // Causes this function to recurse
! __global_unwind2( pRegistrationFrame );
!
!
! // Once we get here, everything is all cleaned up, except
! // for the last frame, where we'll continue execution
! EBP = &pRegistrationFrame->_ebp
!
! __local_unwind2( pRegistrationFrame, trylevel );
!
! // NLG == "non-local-goto" (setjmp/longjmp stuff)
! __NLG_Notify( 1 ); // EAX == scopetable->lpfnHandler
!
! // Set the current trylevel to whatever SCOPETABLE entry
! // was being used when a handler was found
! pRegistrationFrame->trylevel = scopetable->previousTryLevel;
!
! // Call the _except {} block. Never returns.
! pRegistrationFrame->scopetable[trylevel].lpfnHandler();
! }
! }
!
! scopeTable = pRegistrationFrame->scopetable;
! trylevel = scopeTable->previousTryLevel
!
! goto search_for_handler;
! }
! else // trylevel == TRYLEVEL_NONE
! {
! retvalue == DISPOSITION_CONTINUE_SEARCH;
! }
! }
! else // EXCEPTION_UNWINDING or EXCEPTION_EXIT_UNWIND flags are set
! {
! PUSH EBP // Save EBP
!
! EBP = pRegistrationFrame->_ebp // Set EBP for __local_unwind2
!
! __local_unwind2( pRegistrationFrame, TRYLEVEL_NONE )
!
! POP EBP // Restore EBP
!
! retvalue == DISPOSITION_CONTINUE_SEARCH;
! }
! }
!
Index: exutil.c
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/exutil.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** exutil.c 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- exutil.c 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,68 ****
!
! #include <stdlib.h>
! #include <stdio.h>
! #include <excpt.h>
! #include <windows.h>
!
! #include "exutil.h"
!
! void
! WalkExceptionHandlers ()
! {
! PEXCEPTION_REGISTRATION_RECORD p;
! int i;
!
! __asm__("movl %%fs:0,%%eax;movl %%eax,%0" : "=g" (p) : : "%eax");
!
! i = 0;
! while (p != (PEXCEPTION_REGISTRATION_RECORD) -1 && p)
! {
! printf ("Registration %d at %08x : ", i, p);
! printf ("Handler = %08x ", p->handler);
! printf ("Next Registration = %08x\n", p->prev);
! p = p->prev;
! i++;
! }
! printf ("End of exception handler list.\n");
! fflush (stdout);
! }
!
! void
! DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec)
! {
! printf ("Exception: Code = %08x Flags %08x", pExRec->ExceptionCode,
! pExRec->ExceptionFlags);
!
! if (pExRec->ExceptionFlags)
! {
! printf (" ( ");
! if (pExRec->ExceptionFlags & EH_NONCONTINUABLE)
! {
! printf ("EH_NONCONTINUABLE ");
! }
! if (pExRec->ExceptionFlags & EH_UNWINDING)
! {
! printf ("EH_UNWINDING ");
! }
! if (pExRec->ExceptionFlags & EH_EXIT_UNWIND)
! {
! printf ("EH_EXIT_UNWIND ");
! }
! if (pExRec->ExceptionFlags & EH_STACK_INVALID)
! {
! printf ("EH_STACK_INVALID ");
! }
! if (pExRec->ExceptionFlags & EH_NESTED_CALL)
! {
! printf ("EH_NESTED_CALL ");
! }
! printf (")\n");
! }
! else
! {
! printf ("\n");
! }
!
! fflush(stdout);
! }
!
--- 1,68 ----
!
! #include <stdlib.h>
! #include <stdio.h>
! #include <excpt.h>
! #include <windows.h>
!
! #include "exutil.h"
!
! void
! WalkExceptionHandlers ()
! {
! PEXCEPTION_REGISTRATION_RECORD p;
! int i;
!
! __asm__("movl %%fs:0,%%eax;movl %%eax,%0" : "=g" (p) : : "%eax");
!
! i = 0;
! while (p != (PEXCEPTION_REGISTRATION_RECORD) -1 && p)
! {
! printf ("Registration %d at %08x : ", i, p);
! printf ("Handler = %08x ", p->handler);
! printf ("Next Registration = %08x\n", p->prev);
! p = p->prev;
! i++;
! }
! printf ("End of exception handler list.\n");
! fflush (stdout);
! }
!
! void
! DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec)
! {
! printf ("Exception: Code = %08x Flags %08x", pExRec->ExceptionCode,
! pExRec->ExceptionFlags);
!
! if (pExRec->ExceptionFlags)
! {
! printf (" ( ");
! if (pExRec->ExceptionFlags & EH_NONCONTINUABLE)
! {
! printf ("EH_NONCONTINUABLE ");
! }
! if (pExRec->ExceptionFlags & EH_UNWINDING)
! {
! printf ("EH_UNWINDING ");
! }
! if (pExRec->ExceptionFlags & EH_EXIT_UNWIND)
! {
! printf ("EH_EXIT_UNWIND ");
! }
! if (pExRec->ExceptionFlags & EH_STACK_INVALID)
! {
! printf ("EH_STACK_INVALID ");
! }
! if (pExRec->ExceptionFlags & EH_NESTED_CALL)
! {
! printf ("EH_NESTED_CALL ");
! }
! printf (")\n");
! }
! else
! {
! printf ("\n");
! }
!
! fflush(stdout);
! }
!
Index: exutil.def
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/exutil.def,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** exutil.def 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- exutil.def 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,3 ****
! EXPORTS
! WalkExceptionHandlers
! DumpExceptionRecord
--- 1,3 ----
! EXPORTS
! WalkExceptionHandlers
! DumpExceptionRecord
Index: exutil.h
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/exutil.h,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** exutil.h 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- exutil.h 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,23 ****
! /*
! * Definitions of some internal stuff for exception handling, including
! * a version of the all-important EXCEPTION_REGISTRATION_RECORD.
! */
!
! #ifndef _EXUTIL_H_
! #define _EXUTIL_H_
!
! #include <windows.h>
! #include <excpt.h>
!
! #ifdef __cplusplus
! extern "C" {
! #endif
!
! void WalkExceptionHandlers ();
! void DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec);
!
! #ifdef __cplusplus
! }
! #endif
!
! #endif
--- 1,23 ----
! /*
! * Definitions of some internal stuff for exception handling, including
! * a version of the all-important EXCEPTION_REGISTRATION_RECORD.
! */
!
! #ifndef _EXUTIL_H_
! #define _EXUTIL_H_
!
! #include <windows.h>
! #include <excpt.h>
!
! #ifdef __cplusplus
! extern "C" {
! #endif
!
! void WalkExceptionHandlers ();
! void DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec);
!
! #ifdef __cplusplus
! }
! #endif
!
! #endif
Index: jamfile
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/jamfile,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** jamfile 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- jamfile 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,13 ****
!
! Dll exutil.dll : exutil.c ;
!
! ImportLib libexutil.a : exutil.def ;
!
! Main sehtest.exe : sehtest.c ;
!
! Main sehfix.exe : sehfix.c ;
!
! Main sehsub.exe : sehsub.c ;
!
! LinkLibraries sehtest.exe sehfix.exe sehsub.exe : libexutil.a ;
!
--- 1,13 ----
!
! Dll exutil.dll : exutil.c ;
!
! ImportLib libexutil.a : exutil.def ;
!
! Main sehtest.exe : sehtest.c ;
!
! Main sehfix.exe : sehfix.c ;
!
! Main sehsub.exe : sehsub.c ;
!
! LinkLibraries sehtest.exe sehfix.exe sehsub.exe : libexutil.a ;
!
Index: sehfix.c
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/sehfix.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** sehfix.c 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- sehfix.c 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,60 ****
! /*
! * sehfix.c
! *
! * A test program involving an exception handler that fixes the exception
! * causing condition.
! *
! * In this code we install an exception handler my_handler and then a piece
! * of inline assembly attempts to write at the address marked in eax, after
! * setting eax to 10. This should produce an exception. The handler then
! * changes the eax register of the exception context to be the address of
! * a static variable and restarts the code. This should allow everything
! * to continue.
! */
!
! #include <windows.h>
! #include <excpt.h>
!
! #include "exutil.h"
!
! int x;
!
! EXCEPTION_DISPOSITION
! my_handler (
! struct _EXCEPTION_RECORD* pExceptionRec,
! void* pEstablisherFrame,
! struct _CONTEXT* pContextRecord,
! void* pDispatcherContext
! )
! {
! printf ("In my exception handler!\n");
! DumpExceptionRecord (pExceptionRec);
! pContextRecord->Eax = (DWORD) &x;
! return ExceptionContinueExecution;
! }
!
! main ()
! {
! x = 2;
!
! printf ("x = %d\n", x);
!
! WalkExceptionHandlers();
!
! __try1(my_handler)
!
! WalkExceptionHandlers();
!
! /* This assembly code should produce an exception. */
! __asm__("movl $10,%%eax;movl $1,(%%eax);" : : : "%eax");
!
! __except1
!
! WalkExceptionHandlers();
!
! printf ("x = %d\n", x);
!
! printf ("Finished!\n");
! }
!
!
--- 1,60 ----
! /*
! * sehfix.c
! *
! * A test program involving an exception handler that fixes the exception
! * causing condition.
! *
! * In this code we install an exception handler my_handler and then a piece
! * of inline assembly attempts to write at the address marked in eax, after
! * setting eax to 10. This should produce an exception. The handler then
! * changes the eax register of the exception context to be the address of
! * a static variable and restarts the code. This should allow everything
! * to continue.
! */
!
! #include <windows.h>
! #include <excpt.h>
!
! #include "exutil.h"
!
! int x;
!
! EXCEPTION_DISPOSITION
! my_handler (
! struct _EXCEPTION_RECORD* pExceptionRec,
! void* pEstablisherFrame,
! struct _CONTEXT* pContextRecord,
! void* pDispatcherContext
! )
! {
! printf ("In my exception handler!\n");
! DumpExceptionRecord (pExceptionRec);
! pContextRecord->Eax = (DWORD) &x;
! return ExceptionContinueExecution;
! }
!
! main ()
! {
! x = 2;
!
! printf ("x = %d\n", x);
!
! WalkExceptionHandlers();
!
! __try1(my_handler)
!
! WalkExceptionHandlers();
!
! /* This assembly code should produce an exception. */
! __asm__("movl $10,%%eax;movl $1,(%%eax);" : : : "%eax");
!
! __except1
!
! WalkExceptionHandlers();
!
! printf ("x = %d\n", x);
!
! printf ("Finished!\n");
! }
!
!
Index: sehsub.c
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/sehsub.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** sehsub.c 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- sehsub.c 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,43 ****
! /*
! * sehsub.c
! *
! * In an attempt to see what might be going on inside CRTDLL, this program
! * walks the exception list after creating a new thread with _beginthread.
! *
! * It turns out that _beginthread DOES install an exception handler, as
! * expected, but this handler is NOT exported by CRTDLL (it is certainly
! * not _except_handler2 or _XcptFilter)... an odd and unpleasant turn of
! * events.
! */
!
! #include <windows.h>
! #include <excpt.h>
! #include <process.h>
!
! #include "exutil.h"
!
! extern void* __imp__except_handler3;
!
! unsigned
! my_thread (void * p)
! {
! printf ("In my thread.\n");
! WalkExceptionHandlers();
! return 0;
! }
!
! main ()
! {
! unsigned long h;
! unsigned id;
! printf ("In main.\n");
! WalkExceptionHandlers();
!
! printf ("Except_handler3 %08x\n", __imp__except_handler3);
! h = _beginthreadex (NULL, 0, my_thread, NULL, 0, &id);
!
! WaitForSingleObject ((HANDLE) h, INFINITE);
! CloseHandle ((HANDLE) h);
! return;
! }
!
--- 1,43 ----
! /*
! * sehsub.c
! *
! * In an attempt to see what might be going on inside CRTDLL, this program
! * walks the exception list after creating a new thread with _beginthread.
! *
! * It turns out that _beginthread DOES install an exception handler, as
! * expected, but this handler is NOT exported by CRTDLL (it is certainly
! * not _except_handler2 or _XcptFilter)... an odd and unpleasant turn of
! * events.
! */
!
! #include <windows.h>
! #include <excpt.h>
! #include <process.h>
!
! #include "exutil.h"
!
! extern void* __imp__except_handler3;
!
! unsigned
! my_thread (void * p)
! {
! printf ("In my thread.\n");
! WalkExceptionHandlers();
! return 0;
! }
!
! main ()
! {
! unsigned long h;
! unsigned id;
! printf ("In main.\n");
! WalkExceptionHandlers();
!
! printf ("Except_handler3 %08x\n", __imp__except_handler3);
! h = _beginthreadex (NULL, 0, my_thread, NULL, 0, &id);
!
! WaitForSingleObject ((HANDLE) h, INFINITE);
! CloseHandle ((HANDLE) h);
! return;
! }
!
Index: sehtest.c
===================================================================
RCS file: /cvsroot/mingw/runtime/samples/seh/sehtest.c,v
retrieving revision 1.1.1.1
retrieving revision 1.2
diff -C2 -d -r1.1.1.1 -r1.2
*** sehtest.c 4 Jun 2001 23:26:03 -0000 1.1.1.1
--- sehtest.c 26 May 2002 10:06:00 -0000 1.2
***************
*** 1,72 ****
! /*
! * 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");
! }
!
--- 1,72 ----
! /*
! * 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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