145 lines
3.9 KiB
C++
145 lines
3.9 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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//
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// object.cpp - Extension to find Singularity object.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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#include "singx86.h"
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#define VERBOSE 0
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static bool isVtable(PSTR name,
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__out PSTR fullclassname,
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__out PSTR classname,
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__out bool *vector,
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__out bool *value)
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{
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if (vector != NULL) {
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*vector = false;
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}
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if (value != NULL) {
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*value = false;
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}
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// Walk over the module name...
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while (*name && *name != '!') {
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*classname++ = *name;
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*fullclassname++ = *name++;
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}
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*classname = '\0';
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*fullclassname = '\0';
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if (*name != '!') {
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return false;
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}
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*classname++ = *name;
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*fullclassname++ = *name++;
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// Walk over the ClassVector_ if this is a vector type.
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if (strncmp(name, "ClassVector_", 12) == 0) {
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if (vector != NULL) {
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*vector = true;
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}
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name += 12;
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}
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// Walk over the Class_ or Struct_ prefix.
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if (strncmp(name, "Struct_", 7) == 0) {
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if (value != NULL) {
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*value = true;
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}
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name += 7;
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}
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else if (strncmp(name, "Class_", 6) == 0) {
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name += 6;
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}
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// Walk over the class name.
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PSTR classbeg = classname;
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while (*name && *name != ':') {
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if (*name == '_') {
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classname = classbeg;
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*fullclassname++ = *name++;
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continue;
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}
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else {
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*classname++ = *name;
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*fullclassname++ = *name++;
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}
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}
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*classname = '\0';
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*fullclassname = '\0';
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// Check if this is a vtable field.
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return ((strcmp(name, "::_vtable") == 0) ||
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(strcmp(name, "::`vftable'") == 0));
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}
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EXT_DECL(object) // Defines: PDEBUG_CLIENT Client, PCSTR args
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{
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EXT_ENTER(); // Defines: HRESULT status = S_OK;
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UNREFERENCED_PARAMETER(args);
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ULONG64 address = 0;
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status = ExtEvalU64(&args, &address);
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if (status != S_OK) {
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goto Exit;
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}
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ULONG64 vtable = 0;
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EXT_CHECK(g_ExtData->ReadPointersVirtual(1, address, &vtable));
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vtable &= ~(ULONG64)3;
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CHAR name[512];
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ULONG64 displacement = 0;
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status = g_ExtSymbols->GetNameByOffset(vtable,
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name,
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arrayof(name),
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NULL,
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&displacement);
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if (status != S_OK) {
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ExtErr("%p: No type information for vtable: [%p]\n", address, vtable);
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status = E_INVALIDARG;
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goto Exit;
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}
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if (displacement != 0) {
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ExtErr("%p: Invalid vtable %p, nearest symbol is %s+%I64d\n",
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address, vtable, name, displacement);
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status = E_INVALIDARG;
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goto Exit;
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}
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ExtVerb("%p: name %s\n", vtable, name);
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CHAR fullclassname[512];
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CHAR classname[128];
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bool vector = false;
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bool value = false;
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if (!isVtable(name, fullclassname, classname, &vector, &value)) {
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ExtErr("%p: Invalid symbol for vtable: %s\n", address, name);
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goto Exit;
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}
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ExtOut("%p: %s [vtable=%p]\n", address, classname, vtable);
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// We should automatically determine whether classname or
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// fullclassname is correct.
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CHAR command[1024];
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sprintf(command, "dt -n %s %s 0x%p", classname, args, address);
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ExtVerb("Command: %s\n", command);
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status = g_ExtControl->Execute(DEBUG_OUTCTL_ALL_CLIENTS |
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DEBUG_OUTCTL_OVERRIDE_MASK |
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DEBUG_OUTCTL_NOT_LOGGED,
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command,
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DEBUG_EXECUTE_DEFAULT );
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EXT_LEAVE(); // Macro includes: return status;
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}
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