472 lines
10 KiB
C
472 lines
10 KiB
C
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/*++
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Copyright (c) 1992-2000 Microsoft Corporation
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Module Name:
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util.c
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Abstract:
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WinDbg Extension Api
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Environment:
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User Mode.
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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ULONG
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GetBitFieldOffset (
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IN LPSTR Type,
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IN LPSTR Field,
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OUT PULONG pOffset,
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OUT PULONG pSize
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)
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{
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FIELD_INFO flds = {
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Field, "", 0,
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DBG_DUMP_FIELD_FULL_NAME | DBG_DUMP_FIELD_RETURN_ADDRESS | DBG_DUMP_FIELD_SIZE_IN_BITS,
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0, NULL};
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SYM_DUMP_PARAM Sym = {
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sizeof (SYM_DUMP_PARAM), Type, DBG_DUMP_NO_PRINT, 0,
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NULL, NULL, NULL, 1, &flds
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};
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ULONG Err, i=0;
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LPSTR dot, last=Field;
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Sym.nFields = 1;
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Err = Ioctl( IG_DUMP_SYMBOL_INFO, &Sym, Sym.size );
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*pOffset = (ULONG) (flds.address - Sym.addr);
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*pSize = flds.size;
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return Err;
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}
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ULONG
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GetUlongFromAddress (
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ULONG64 Location
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)
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{
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ULONG Value;
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ULONG result;
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if ((!ReadMemory(Location,&Value,sizeof(ULONG),&result)) ||
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(result < sizeof(ULONG))) {
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dprintf("unable to read from %08x\n",Location);
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return 0;
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}
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return Value;
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}
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ULONG64
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GetPointerFromAddress (
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ULONG64 Location
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)
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{
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ULONG64 Value;
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ULONG result;
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if (!ReadPointer(Location,&Value)) {
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dprintf("unable to read from %08p\n",Location);
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return 0;
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}
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return Value;
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}
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ULONG
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GetUlongValue (
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PCHAR String
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)
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{
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ULONG64 Location;
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ULONG Value;
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ULONG result;
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Location = GetExpression( String );
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if (!Location) {
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dprintf("unable to get %s\n",String);
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return 0;
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}
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return GetUlongFromAddress( Location );
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}
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ULONG64
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GetPointerValue (
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PCHAR String
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)
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{
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ULONG64 Location, Val=0;
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Location = GetExpression( String );
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if (!Location) {
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dprintf("unable to get %s\n",String);
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return 0;
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}
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ReadPointer(Location, &Val);
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return Val;
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}
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#if 0
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VOID
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DumpImageName(
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IN ULONG64 Process
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)
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{
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ULONG64 ImageFileName;
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STRING String;
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ULONG Result;
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IN WCHAR Buf[512];
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if ( !GetFieldValue(Process, "EPROCESS", "ImageFileName.Buffer", ImageFileName ) ){
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wcscpy(Buf,L"*** image name unavailable ***");
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if ( ReadMemory( ImageFileName,
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&String,
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sizeof(STRING),
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&Result) ) {
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if ( ReadMemory( (DWORD)String.Buffer,
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&Buf[0],
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String.Length,
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&Result) ) {
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Buf[String.Length/sizeof(WCHAR)] = UNICODE_NULL;
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}
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}
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} else {
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wcscpy(Buf,L"System Process");
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}
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dprintf("%ws",Buf);
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}
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#endif
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BOOLEAN
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DbgRtlIsRightChild(
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ULONG64 pLinks,
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ULONG64 Parent
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)
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{
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ULONG64 RightChild;
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if (Parent == pLinks) {
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return FALSE;
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}
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if (GetFieldValue(Parent, "RTL_SPLAY_LINKS", "RightChild", RightChild)) {
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return FALSE;
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}
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if (RightChild == pLinks) {
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return TRUE;
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}
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return FALSE;
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}
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BOOLEAN
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DbgRtlIsLeftChild(
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ULONG64 pLinks,
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ULONG64 Parent
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)
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{
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ULONG64 LeftChild;
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if (Parent == pLinks) {
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return FALSE;
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}
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if (GetFieldValue(Parent, "RTL_SPLAY_LINKS", "LeftChild", LeftChild)) {
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return FALSE;
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}
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if (LeftChild == pLinks) {
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return TRUE;
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}
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return FALSE;
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}
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ULONG
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DumpSplayTree(
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IN ULONG64 pSplayLinks,
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IN PDUMP_SPLAY_NODE_FN DumpNodeFn
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)
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/*++
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Purpose:
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Perform an in-order iteration across a splay tree, calling a
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user supplied function with a pointer to each RTL_SPLAY_LINKS
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structure encountered in the tree, and the level in the tree
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at which it was encountered (zero based).
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Arguments:
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pSplayLinks - pointer to root of a splay tree
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DumpNodeFn - user supplied dumping function
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Returns:
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Count of nodes encountered in the tree.
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Notes:
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Errors reading memory do not terminate the iteration if more
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work is possible.
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Consumes the Control-C flag to terminate possible loops in
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corrupt structures.
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--*/
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{
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ULONG Level = 0;
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ULONG NodeCount = 0;
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if (pSplayLinks) {
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ULONG64 LeftChild, RightChild, Parent, Current;
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//
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// Retrieve the root links, find the leftmost node in the tree
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//
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if (GetFieldValue(Current = pSplayLinks,
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"RTL_SPLAY_LINKS",
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"LeftChild",
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LeftChild)) {
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return NodeCount;
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}
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while (LeftChild != 0) {
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if ( CheckControlC() ) {
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return NodeCount;
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}
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if (GetFieldValue(Current = LeftChild,
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"RTL_SPLAY_LINKS",
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"LeftChild",
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LeftChild)) {
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//
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// We can try to continue from this
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//
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break;
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}
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Level++;
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}
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while (TRUE) {
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if ( CheckControlC() ) {
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return NodeCount;
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}
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NodeCount++;
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pSplayLinks = Current;
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(*DumpNodeFn)(pSplayLinks, Level);
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/*
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first check to see if there is a right subtree to the input link
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if there is then the real successor is the left most node in
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the right subtree. That is find and return P in the following diagram
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Links
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\
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.
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.
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.
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/
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P
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\
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*/
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GetFieldValue(Current, "RTL_SPLAY_LINKS", "RightChild", RightChild);
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if (RightChild != 0) {
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if (GetFieldValue(Current = RightChild,
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"RTL_SPLAY_LINKS",
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"RightChild",
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RightChild)) {
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//
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// We've failed to step through to a successor, so
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// there is no more to do
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//
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return NodeCount;
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}
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Level++;
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GetFieldValue(Current,"RTL_SPLAY_LINKS","LeftChild",LeftChild);
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while (LeftChild != 0) {
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if ( CheckControlC() ) {
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return NodeCount;
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}
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if (GetFieldValue(Current = LeftChild,
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"RTL_SPLAY_LINKS",
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"LeftChild",
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LeftChild)) {
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//
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// We can continue from this
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//
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break;
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}
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Level++;
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}
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} else {
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/*
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we do not have a right child so check to see if have a parent and if
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so find the first ancestor that we are a left decendent of. That
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is find and return P in the following diagram
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P
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/
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.
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.
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.
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Links
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*/
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//
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// If the IsLeft or IsRight functions fail to read through a parent
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// pointer, then we will quickly exit through the break below
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//
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GetFieldValue(Current, "RTL_SPLAY_LINKS", "Parent", Parent);
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while (DbgRtlIsRightChild(Current, Parent)) {
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if ( CheckControlC() ) {
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return NodeCount;
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}
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Level--;
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pSplayLinks = (Current = Parent);
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}
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GetFieldValue(Current, "RTL_SPLAY_LINKS", "Parent", Parent);
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if (!DbgRtlIsLeftChild(Current, Parent)) {
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//
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// we do not have a real successor so we break out
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//
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break;
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} else {
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Level--;
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pSplayLinks = (Current = Parent);
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}
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}
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}
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}
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return NodeCount;
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}
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VOID
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DumpUnicode64(
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UNICODE_STRING64 u
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)
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{
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UNICODE_STRING v;
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DWORD BytesRead;
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// dprintf("L %x, M %x, B %p ", u.Length, u.MaximumLength, u.Buffer);
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if ((u.Length <= u.MaximumLength) &&
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(u.Buffer) &&
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(u.Length > 0)) {
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v.Buffer = LocalAlloc(LPTR, u.MaximumLength);
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if (v.Buffer != NULL) {
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v.MaximumLength = u.MaximumLength;
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v.Length = u.Length;
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if (ReadMemory(u.Buffer,
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v.Buffer,
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u.Length,
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(PULONG) &u.Buffer)) {
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dprintf("%wZ", &v);
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} else {
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dprintf("<???>");
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}
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LocalFree(v.Buffer);
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return;
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}
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}
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}
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BOOLEAN
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IsHexNumber(
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const char *szExpression
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)
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{
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if (!szExpression[0]) {
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return FALSE ;
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}
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for(;*szExpression; szExpression++) {
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if ((*szExpression)< '0') { return FALSE ; }
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else if ((*szExpression)> 'f') { return FALSE ; }
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else if ((*szExpression)>='a') { continue ; }
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else if ((*szExpression)> 'F') { return FALSE ; }
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else if ((*szExpression)<='9') { continue ; }
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else if ((*szExpression)>='A') { continue ; }
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else { return FALSE ; }
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}
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return TRUE ;
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}
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BOOLEAN
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IsDecNumber(
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const char *szExpression
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (!szExpression[0]) {
|
||
|
|
return FALSE ;
|
||
|
|
}
|
||
|
|
|
||
|
|
while(*szExpression) {
|
||
|
|
|
||
|
|
if ((*szExpression)<'0') { return FALSE ; }
|
||
|
|
else if ((*szExpression)>'9') { return FALSE ; }
|
||
|
|
szExpression ++ ;
|
||
|
|
}
|
||
|
|
return TRUE ;
|
||
|
|
}
|