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