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/*++
Copyright (c) 1992 Microsoft Corporation
Module Name:
reflect.c
Abstract:
This module contains extensions having to do with event and exception
reflection.
Author:
Dave Hastings (daveh) 20-Apr-1992
Revision History:
--*/
#include "ieuvddex.h"
VOID
Erp(
IN HANDLE CurrentProcess,
IN HANDLE CurrentThread,
IN LPSTR ArgumentString
)
/*++
Routine Description:
This routine toggles the exception reflection bit in the vdmtib, and
reports the current state
Arguments:
CurrentProcess -- Supplies a handle to the process to dump selectors for
CurrentThread -- Supplies a handle to the thread to dump selectors for
ArgumentString -- Supplies the arguments to the !sel command
Return Value:
None.
--*/
{
BOOL Status;
ULONG BytesRead;
PVOID Address;
ULONG Flags;
UNREFERENCED_PARAMETER(CurrentThread);
UNREFERENCED_PARAMETER(ArgumentString);
if ( fWinDbg ) {
(*Print)("This command is not supported under WinDbg\n");
} else {
Address = (PVOID) FIXED_NTVDMSTATE_LINEAR;
//
// Read the current value of the flags
//
Status = ReadProcessMem(
CurrentProcess,
Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
(ULONG)Address = (*GetExpression)("ntvdm!InitialVdmTibFlags");
Status = ReadProcessMem(
CurrentProcess,
(PVOID)Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
GetLastError();
(*Print)("Could not get InitialTibflags\n");
return;
}
}
//
// Toggle exception bit
//
Flags ^= VDM_BREAK_EXCEPTIONS;
Status = WriteProcessMem(
CurrentProcess,
Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
GetLastError();
(*Print)("Could not get set Flags\n");
return;
}
//
// Tell user what will happen with exceptions
//
if (Flags & VDM_BREAK_EXCEPTIONS) {
(*Print)("GP Fault exceptions will be reflected to the debugger\n");
} else {
(*Print)("GP Fault exceptions will be reflected to the application\n");
}
}
}
VOID
Drp(
IN HANDLE CurrentProcess,
IN HANDLE CurrentThread,
IN LPSTR ArgumentString
)
/*++
Routine Description:
This routine toggles the debug reflection bit in the vdmtib, and
reports the current state
Arguments:
CurrentProcess -- Supplies a handle to the process to dump selectors for
CurrentThread -- Supplies a handle to the thread to dump selectors for
ArgumentString -- Supplies the arguments to the !sel command
Return Value:
None.
--*/
{
BOOL Status;
ULONG BytesRead;
PVOID Address;
ULONG Flags;
UNREFERENCED_PARAMETER(CurrentThread);
UNREFERENCED_PARAMETER(ArgumentString);
if ( fWinDbg ) {
(*Print)("This command is not supported under WinDbg\n");
} else {
Address = (PVOID) FIXED_NTVDMSTATE_LINEAR;
//
// Read the current value of the flags
//
Status = ReadProcessMem(
CurrentProcess,
Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
(ULONG)Address = (*GetExpression)("ntvdm!InitialVdmTibFlags");
Status = ReadProcessMem(
CurrentProcess,
(PVOID)Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
GetLastError();
(*Print)("Could not get InitialTibflags\n");
return;
}
}
//
// Toggle exception bit
//
Flags ^= VDM_BREAK_DEBUGGER;
Status = WriteProcessMem(
CurrentProcess,
Address,
&Flags,
sizeof(ULONG),
&BytesRead
);
if ((!Status) || (BytesRead != sizeof(ULONG))) {
GetLastError();
(*Print)("Could not get set Flags\n");
return;
}
//
// Tell user what will happen with exceptions
//
if (!(Flags & VDM_BREAK_DEBUGGER)) {
(*Print)("Debug faults will be reflected to the application\n");
} else {
(*Print)("Debug faults will be reflected to the debugger\n");
}
}
}
|
