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656 lines
23 KiB
656 lines
23 KiB
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997.
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//
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// File: analyze.cxx
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//
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// Contents: program to analyze the lock order table
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//
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// Classes:
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//
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// Functions:
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//
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// Coupling:
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//
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// Notes:
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//
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// History: 3-16-2000 benl Created
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//
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//----------------------------------------------------------------------------
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define _NTFS_NTFSDBG_DEFINITIONS_
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#include "lockorder.h"
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typedef struct {
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LIST_ENTRY Links;
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NTFS_RESOURCE_NAME Resource;
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} RESOURCE_LIST, *PRESOURCE_LIST;
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typedef struct {
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NTFS_RESOURCE_NAME Resource;
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LIST_ENTRY Links;
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NTFS_OWNERSHIP_STATE EndState;
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} RESOURCE_STATE_LIST, *PRESOURCE_STATE_LIST;
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//
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// structure used to track the order a state is reached by
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//
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typedef struct {
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NTFS_OWNERSHIP_STATE State;
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BOOLEAN ReachedByRelease;
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LIST_ENTRY Links; // RESOURCE_LIST
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} RESOURCE_STATE_ORDER, *PRESOURCE_STATE_ORDER;
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//+---------------------------------------------------------------------------
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//
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// Function: CompareRoutine
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//
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// Synopsis:
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//
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// Arguments: [Table] --
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// [First] --
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// [Second] --
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//
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// Returns:
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//
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// History: 5-08-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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RTL_GENERIC_COMPARE_RESULTS CompareRoutine( struct _RTL_GENERIC_TABLE *Table, PVOID First, PVOID Second )
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{
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PULONG FirstUlong = (PULONG)First;
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PULONG SecondUlong = (PULONG)Second;
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if (*FirstUlong == *SecondUlong) {
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return GenericEqual;
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} else if (*FirstUlong < *SecondUlong) {
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return GenericLessThan;
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} else {
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return GenericGreaterThan;
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}
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} // CompareRoutine
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//+---------------------------------------------------------------------------
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//
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// Function: AllocateRoutine
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//
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// Synopsis:
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//
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// Arguments: [Table] --
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// [ByteSize] --
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//
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// Returns:
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//
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// History: 5-08-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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PVOID AllocateRoutine( struct _RTL_GENERIC_TABLE *Table, CLONG ByteSize )
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{
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return malloc( ByteSize );
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} // AllocateRoutine
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//+---------------------------------------------------------------------------
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//
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// Function: FreeRoutine
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//
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// Synopsis:
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//
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// Arguments: [Table] --
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// [Buffer] --
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//
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// Returns:
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//
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// History: 5-08-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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VOID FreeRoutine( struct _RTL_GENERIC_TABLE *Table, PVOID Buffer )
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{
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free( Buffer );
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} // FreeRoutine
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//+---------------------------------------------------------------------------
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//
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// Function: FindOrInsertStateOrder
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//
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// Synopsis:
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//
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// Arguments: [Table] --
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// [Element] --
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//
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// Returns:
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//
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// History: 5-08-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void FindOrInsertStateOrder( PRTL_GENERIC_TABLE StateTable, NTFS_OWNERSHIP_STATE State )
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{
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RESOURCE_STATE_ORDER TemplateState;
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PRESOURCE_STATE_ORDER NewState;
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TemplateState.State = State;
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if (!(RtlLookupElementGenericTable( StateTable, &TemplateState ))) {
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NewState = (PRESOURCE_STATE_ORDER)RtlInsertElementGenericTable( StateTable, &TemplateState, sizeof( TemplateState ), NULL );
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InitializeListHead( &NewState->Links );
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NewState->ReachedByRelease = FALSE;
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}
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} // FindOrInsertStateOrder
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//+---------------------------------------------------------------------------
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//
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// Function: FindOrInsertStateList
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//
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// Synopsis:
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//
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// Arguments: [StateTable] --
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// [Resource] --
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//
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// Returns:
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//
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// History: 5-08-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void FindOrInsertStateList( PRTL_GENERIC_TABLE StateTable, NTFS_RESOURCE_NAME Resource )
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{
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RESOURCE_STATE_LIST TemplateState;
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PRESOURCE_STATE_LIST NewState;
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TemplateState.Resource = Resource;
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if (!(RtlLookupElementGenericTable( StateTable, &TemplateState ))) {
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NewState = (PRESOURCE_STATE_LIST)RtlInsertElementGenericTable( StateTable, &TemplateState, sizeof( TemplateState ), NULL );
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InitializeListHead( &NewState->Links );
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}
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} // FindOrInsertStateList
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//+---------------------------------------------------------------------------
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//
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// Function: main
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//
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// Synopsis:
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//
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// Arguments: [argc] --
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// [argv] --
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//
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// Returns:
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//
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// History: 3-16-2000 benl Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void __cdecl main (int argc, char *argv[])
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{
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int NumTransitions;
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int Index;
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int Index2;
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PRESOURCE_LIST Entry;
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PRESOURCE_LIST Entry2;
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PRESOURCE_STATE_LIST EntryState;
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PRESOURCE_STATE_LIST EntryState2;
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BOOLEAN Skipped;
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BOOLEAN FoundState;
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BOOLEAN Verbose = FALSE;
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PRESOURCE_STATE_ORDER State;
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PRESOURCE_STATE_ORDER EndState;
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PRESOURCE_STATE_ORDER EndState2;
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RTL_GENERIC_TABLE StateTable;
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RTL_GENERIC_TABLE ResourceTable;
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RESOURCE_STATE_ORDER StateOrder;
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RESOURCE_STATE_LIST StateListOrderTemplate;
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PRESOURCE_STATE_LIST StateListOrder;
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PVOID Key;
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int StateCheck;
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if (argc > 1) {
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if (argv[1][0] == '-') {
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switch (argv[1][1]) {
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case 'v':
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Verbose = TRUE;
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break;
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default:
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printf( "Usage: analyze [-v]\nThis program analyzes ntfs's lock order state table\n");
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break;
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}
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}
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}
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//
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// Discover transition states
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//
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RtlInitializeGenericTable( &StateTable, CompareRoutine, AllocateRoutine, FreeRoutine, NULL );
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RtlInitializeGenericTable( &ResourceTable, CompareRoutine, AllocateRoutine, FreeRoutine, NULL );
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StateOrder.ReachedByRelease = FALSE;
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NumTransitions = sizeof( OwnershipTransitionTable ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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FindOrInsertStateList( &ResourceTable, OwnershipTransitionTable[Index].Acquired );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTable[Index].Begin );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTable[Index].End );
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}
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NumTransitions = sizeof( OwnershipTransitionTableRelease ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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FindOrInsertStateList( &ResourceTable, OwnershipTransitionTableRelease[Index].Acquired );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableRelease[Index].Begin );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableRelease[Index].End );
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}
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NumTransitions = sizeof( OwnershipTransitionTableAcquire ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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FindOrInsertStateList( &ResourceTable, OwnershipTransitionTableAcquire[Index].Acquired );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableAcquire[Index].Begin );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableAcquire[Index].End );
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}
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NumTransitions = sizeof( OwnershipTransitionTableUnsafe ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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FindOrInsertStateList( &ResourceTable, OwnershipTransitionTableUnsafe[Index].Acquired );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableUnsafe[Index].Begin );
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FindOrInsertStateOrder( &StateTable, OwnershipTransitionTableUnsafe[Index].End );
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}
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printf( "%d states and %d resources referenced in transition tables\n\n",
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StateTable.NumberGenericTableElements,
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ResourceTable.NumberGenericTableElements );
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/*
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for (State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTable( &StateTable, TRUE );
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State != 0;
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State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTable( &StateTable, FALSE )) {
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printf("0x%x\n", State->State );
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}
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*/
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//
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// Visit each transition state until we know the full paths
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//
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do {
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Skipped = FALSE;
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FoundState = FALSE;
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Key = NULL;
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for (State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTableWithoutSplaying( &StateTable, &Key );
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State != 0;
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State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTableWithoutSplaying( &StateTable, &Key )) {
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// printf( "State: 0x%x\n", State->State );
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//
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// We don't know this state yet
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//
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if ((State->State != None) && IsListEmpty( &State->Links)) {
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if (Verbose) {
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printf( "skipping state 0x%x\n", State->State );
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}
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Skipped = TRUE;
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continue;
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}
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//
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// Look in the release only paths 1st
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//
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NumTransitions = sizeof( OwnershipTransitionTableRelease ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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if (OwnershipTransitionTableRelease[Index].Begin == State->State &&
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OwnershipTransitionTableRelease[Index].End != None) {
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StateOrder.State = OwnershipTransitionTableRelease[Index].End;
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EndState = (PRESOURCE_STATE_ORDER)RtlLookupElementGenericTable( &StateTable, &StateOrder );
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//
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// Is this a new state?
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//
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if (EndState && IsListEmpty( &EndState->Links )) {
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FoundState = TRUE;
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EndState->ReachedByRelease = TRUE;
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if (Verbose) {
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printf( "removing resource: 0x%x to state: 0x%x from 0x%x during release\n",
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OwnershipTransitionTableRelease[Index].Acquired,
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OwnershipTransitionTableRelease[Index].End,
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State->State );
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}
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//
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// Add the old state's resource except for the resource being released
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//
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if (State->State != None) {
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Entry = (PRESOURCE_LIST)&State->Links;
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do {
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Entry = (PRESOURCE_LIST)Entry->Links.Flink;
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if (Entry->Resource != OwnershipTransitionTableRelease[Index].Acquired) {
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Entry2 = new RESOURCE_LIST;
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Entry2->Resource = Entry->Resource;
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InsertTailList( &EndState->Links, &Entry2->Links );
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}
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} while ( Entry->Links.Flink != &State->Links );
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}
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} // endif the new state is unknown
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} // endif rule beginning matches the state
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} // endfor over rules
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//
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// Then look in the acquire paths
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//
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NumTransitions = sizeof( OwnershipTransitionTable ) / sizeof( NTFS_OWNERSHIP_TRANSITION );
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for (Index=0; Index < NumTransitions; Index++) {
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if (OwnershipTransitionTable[Index].Begin == State->State) {
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StateOrder.State = OwnershipTransitionTable[Index].End;
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EndState = (PRESOURCE_STATE_ORDER)RtlLookupElementGenericTable( &StateTable, &StateOrder );
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EndState->ReachedByRelease = FALSE;
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//
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// If we already know this state - then doublecheck this is an identical path
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//
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if (EndState && !IsListEmpty( &EndState->Links )) {
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Entry = (PRESOURCE_LIST)EndState->Links.Flink;
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if (Entry->Resource != NtfsResourceExVcb) {
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Entry = (PRESOURCE_LIST)EndState->Links.Blink;
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if (OwnershipTransitionTable[Index].Acquired != Entry->Resource ) {
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printf( "2 paths to state: 0x%x 0x%x 0x%x\n", OwnershipTransitionTable[Index].End, Entry->Resource, OwnershipTransitionTable[Index].Acquired );
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}
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}
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} else {
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FoundState = TRUE;
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if (Verbose) {
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printf( "adding resource: 0x%x to state: 0x%x from 0x%x\n",
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OwnershipTransitionTable[Index].Acquired,
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OwnershipTransitionTable[Index].End,
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State->State );
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}
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//
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// Add the old state's resource
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//
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if (State->State != None) {
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Entry = (PRESOURCE_LIST)&State->Links;
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do {
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Entry = (PRESOURCE_LIST)Entry->Links.Flink;
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Entry2 = new RESOURCE_LIST;
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Entry2->Resource = Entry->Resource;
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InsertTailList( &EndState->Links, &Entry2->Links );
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} while ( Entry->Links.Flink != &State->Links );
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}
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//
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// Finally add the transition resource into this state
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//
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Entry = new RESOURCE_LIST;
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Entry->Resource = OwnershipTransitionTable[Index].Acquired;
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InsertTailList( &EndState->Links, &Entry->Links );
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}
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}
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}
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}
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if (Verbose) {
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printf( "pass done\n" );
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}
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} while (FoundState && Skipped);
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//
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// Printout state maps
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//
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printf( "State Map\n" );
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for (State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTable( &StateTable, TRUE );
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State != 0;
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State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTable( &StateTable, FALSE )) {
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StateCheck = 0;
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if (!IsListEmpty( &State->Links )) {
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Entry = (PRESOURCE_LIST)&State->Links;
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do {
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Entry = (PRESOURCE_LIST)Entry->Links.Flink;
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StateCheck |= Entry->Resource;
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printf( "%x -> ", Entry->Resource );
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} while ( Entry->Links.Flink != &State->Links );
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printf( "state %x\n", State->State );
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if ((int)State->State != StateCheck) {
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printf( "State transistions do not make sense, check the state definition\n" );
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}
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} else {
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printf( "unreachable state: 0x%x\n", State->State );
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}
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}
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//
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// Now build up individual transitions
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//
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printf( "Subtransitions\n" );
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Key = NULL;
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for (State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTableWithoutSplaying( &StateTable, &Key );
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State != 0;
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State = (PRESOURCE_STATE_ORDER) RtlEnumerateGenericTableWithoutSplaying( &StateTable, &Key )) {
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if (!IsListEmpty( &State->Links )) {
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// printf( "State: 0x%x\n", State->State );
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Entry = (PRESOURCE_LIST)&State->Links;
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do {
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Entry = (PRESOURCE_LIST)Entry->Links.Flink;
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Entry2 = Entry;
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while (Entry2->Links.Flink != &State->Links) {
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BOOLEAN Found;
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Entry2 = (PRESOURCE_LIST)Entry2->Links.Flink;
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//
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// First search if transition exists already from Entry->Resource to Entry2->Resource
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//
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Found = FALSE;
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StateListOrderTemplate.Resource = Entry->Resource;
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StateListOrder = (PRESOURCE_STATE_LIST)RtlLookupElementGenericTable( &ResourceTable, &StateListOrderTemplate );
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if (!IsListEmpty( &StateListOrder->Links )) {
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// printf( "FirstLink: 0x%x\n", StateListOrder->Links.Flink );
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EntryState2 = StateListOrder;
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do {
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EntryState2 = CONTAINING_RECORD( EntryState2->Links.Flink, RESOURCE_STATE_LIST, Links );
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if (EntryState2->Resource == Entry2->Resource) {
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PRESOURCE_LIST OldEntry;
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//
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// Always choose state that started without vcb
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//
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StateOrder.State = EntryState2->EndState;
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EndState = (PRESOURCE_STATE_ORDER)RtlLookupElementGenericTable( &StateTable, &StateOrder );
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OldEntry = (PRESOURCE_LIST)EndState->Links.Flink;
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if ((OldEntry->Resource == NtfsResourceSharedVcb) ||
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(OldEntry->Resource == NtfsResourceExVcb)) {
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EntryState2->EndState = State->State;
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}
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Found = TRUE;
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break;
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}
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} while ( EntryState2->Links.Flink != &StateListOrder->Links );
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}
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if (!Found) {
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//
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// Look for conflicts since its new
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//
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StateListOrderTemplate.Resource = Entry2->Resource;
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StateListOrder = (PRESOURCE_STATE_LIST)RtlLookupElementGenericTable( &ResourceTable, &StateListOrderTemplate );
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// printf( "Resource: 0x%x, empty: %d\n", StateListOrder->Resource, IsListEmpty( &StateListOrder->Links ) );
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if (StateListOrder && !IsListEmpty( &StateListOrder->Links )) {
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EntryState2 = StateListOrder;
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do {
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EntryState2 = CONTAINING_RECORD( EntryState2->Links.Flink, RESOURCE_STATE_LIST, Links );
|
|
|
|
if ((EntryState2->Resource == Entry->Resource)) {
|
|
printf( "possible conflict from 0x%x to 0x%x in state 0x%x and state 0x%x\n", Entry->Resource, Entry2->Resource, State, EntryState2->EndState );
|
|
}
|
|
|
|
// printf( "check from 0x%x to 0x%x in state 0x%x and state 0x%x\n", Entry->Resource, Entry2->Resource, State, EntryState2->EndState );
|
|
|
|
StateOrder.State = EntryState2->EndState;
|
|
EndState = (PRESOURCE_STATE_ORDER)RtlLookupElementGenericTable( &StateTable, &StateOrder );
|
|
|
|
StateOrder.State = State->State;
|
|
EndState2 = (PRESOURCE_STATE_ORDER)RtlLookupElementGenericTable( &StateTable, &StateOrder );
|
|
|
|
if ((EntryState2->Resource == Entry->Resource) &&
|
|
!EndState->ReachedByRelease &&
|
|
!EndState2->ReachedByRelease) {
|
|
|
|
//
|
|
// Now check if vcb locks it out
|
|
//
|
|
|
|
if (!(((((PRESOURCE_LIST)(EndState2->Links.Flink))->Resource == NtfsResourceSharedVcb) ||
|
|
((PRESOURCE_LIST)(EndState2->Links.Flink))->Resource == NtfsResourceExVcb) &&
|
|
|
|
((((PRESOURCE_LIST)(EndState->Links.Flink))->Resource == NtfsResourceSharedVcb) ||
|
|
((PRESOURCE_LIST)(EndState->Links.Flink))->Resource == NtfsResourceExVcb))) {
|
|
|
|
printf( "Suborder conflict from 0x%x to 0x%x in state 0x%x and state 0x%x\n", Entry->Resource, Entry2->Resource, State->State, EntryState2->EndState );
|
|
break;
|
|
} else {
|
|
// printf( "NonSuborder conflict from 0x%x to 0x%x in state 0x%x and state 0x%x\n", Entry->Resource, Entry2->Resource, State, EntryState2->EndState );
|
|
}
|
|
}
|
|
|
|
} while ( EntryState2->Links.Flink != &StateListOrder->Links );
|
|
} else {
|
|
// printf ("Unfound resource: 0x%x 0x%x\n", Entry2->Resource, StateListOrder );
|
|
}
|
|
|
|
StateListOrderTemplate.Resource = Entry->Resource;
|
|
StateListOrder = (PRESOURCE_STATE_LIST)RtlLookupElementGenericTable( &ResourceTable, &StateListOrderTemplate );
|
|
|
|
EntryState = new RESOURCE_STATE_LIST;
|
|
EntryState->Resource = Entry2->Resource;
|
|
EntryState->EndState = State->State;
|
|
|
|
// printf( "Adding 0x%x to list for resource 0x%x\n", EntryState, Entry->Resource );
|
|
|
|
InsertTailList( &StateListOrder->Links, &EntryState->Links );
|
|
}
|
|
}
|
|
|
|
} while ( Entry->Links.Flink != &State->Links );
|
|
}
|
|
}
|
|
|
|
//
|
|
// Dump the inidivual transitions
|
|
//
|
|
|
|
Key = NULL;
|
|
for (StateListOrder = (PRESOURCE_STATE_LIST) RtlEnumerateGenericTableWithoutSplaying( &ResourceTable, &Key );
|
|
StateListOrder != 0;
|
|
StateListOrder = (PRESOURCE_STATE_LIST) RtlEnumerateGenericTableWithoutSplaying( &ResourceTable, &Key )) {
|
|
|
|
if (!IsListEmpty( &StateListOrder->Links )) {
|
|
EntryState = StateListOrder;
|
|
do {
|
|
EntryState = CONTAINING_RECORD( EntryState->Links.Flink, RESOURCE_STATE_LIST, Links );
|
|
printf( "0x%x -> 0x%x endstate:0x%x\n ", StateListOrder->Resource, EntryState->Resource, EntryState->EndState );
|
|
|
|
} while ( EntryState->Links.Flink != &StateListOrder->Links );
|
|
}
|
|
}
|
|
|
|
} // main
|