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XDbgProxy.cpp
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#include <tchar.h>
#include <Windows.h>
#include <WinNT.h>
#include "XDbgProxy.h"
#include <assert.h>
#include "Win32ApiWrapper.h"
#include "Win32ApiWrapper.h"
#include <tlhelp32.h>
#include <Psapi.h>
#include "Utils.h"
#include "common.h"
extern UINT ignore_dbgstr;
extern UINT inject_method;
extern UINT simu_attach_bp;
XDbgProxy::XDbgProxy(void) : _apiThread(*this)//, _eventQueue(1, 1)
{
_hPipe = INVALID_HANDLE_VALUE;
_hApiPipe = INVALID_HANDLE_VALUE;
memset(&_lastException, 0l, sizeof(_lastException));
_stopFlag = 0;
_attached = false;
_lastExceptCode = 0;
_lastExceptAddr = 0;
_vehCookie = NULL;
registerRemoteApi();
_exceptHandleCode = 0;
_evtQueueEvent = NULL;
}
XDbgProxy::~XDbgProxy(void)
{
if (_hPipe != INVALID_HANDLE_VALUE)
XDbgCloseHandle(_hPipe);
}
BOOL XDbgProxy::sendDbgEvent(const DebugEventPacket& event)
{
if (event.event.dwDebugEventCode > LAST_EVENT) {
assert(false);
return FALSE;
}
if (event.event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
memset((void* )&event.ctx, 0l, sizeof(event.ctx));
DWORD len;
if (!XDbgWriteFile(_hPipe, &event, sizeof(event), &len, NULL)) {
// log error
return FALSE;
}
return TRUE;
}
BOOL XDbgProxy::recvDbgAck(struct DebugAckPacket& ack)
{
DWORD len;
if (!XDbgReadFile(_hPipe, &ack, sizeof(ack), &len, NULL)) {
// log error
return FALSE;
}
return TRUE;
}
BOOL XDbgProxy::sendDbgEvent(const DebugEventPacket& event, struct DebugAckPacket& ack, bool freeze)
{
BOOL result;
if (freeze)
suspendAll(event.event.dwThreadId);
if (sendDbgEvent(event))
result = recvDbgAck(ack);
else
result = FALSE;
if (freeze)
resumeAll(event.event.dwThreadId);
return result;
}
void XDbgProxy::pushDbgEvent(DebugEventPacket& pkt)
{
MutexGuard guard2(&_evtLock);
{
MutexGuard guard(&_evtQueueLock);
::ResetEvent(_evtQueueEvent);
_pendingEvents.push_back(pkt);
}
::WaitForSingleObject(_evtQueueEvent, INFINITE);
}
bool XDbgProxy::popDbgEvent(DebugEventPacket& pkt)
{
if (!_evtQueueLock.trylock())
return false;
bool result = false;
if (_pendingEvents.size()) {
DebugEventPacket& ret = _pendingEvents.front();
pkt = ret;
_pendingEvents.pop_front();
result = true;
}
_evtQueueLock.unlock();
return result;
}
LONG CALLBACK XDbgProxy::_VectoredHandler(PEXCEPTION_POINTERS ExceptionInfo)
{
return XDbgProxy::instance().VectoredHandler(ExceptionInfo);
}
VOID CALLBACK XDbgProxy::_LdrDllNotification(ULONG NotificationReason, PCLDR_DLL_NOTIFICATION_DATA NotificationData,
PVOID Context)
{
XDbgProxy::instance().LdrDllNotification(NotificationReason, NotificationData, Context);
}
VOID CALLBACK XDbgProxy::LdrDllNotification(ULONG NotificationReason, PCLDR_DLL_NOTIFICATION_DATA NotificationData,
PVOID Context)
{
if (!_attached)
return;
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = XDbgGetCurrentThreadId();
if (NotificationReason == LDR_DLL_NOTIFICATION_REASON_LOADED) {
msg.dwDebugEventCode = LOAD_DLL_DEBUG_EVENT;
msg.u.LoadDll.dwDebugInfoFileOffset = 0;
msg.u.LoadDll.fUnicode = 1;
msg.u.LoadDll.hFile = NULL;
msg.u.LoadDll.lpBaseOfDll = NotificationData->Loaded.DllBase;
msg.u.LoadDll.lpImageName = _wcsdup(NotificationData->Loaded.FullDllName->Buffer);
msg.u.LoadDll.nDebugInfoSize = 0;
} else if (NotificationReason == LDR_DLL_NOTIFICATION_REASON_UNLOADED) {
msg.dwDebugEventCode = UNLOAD_DLL_DEBUG_EVENT;
msg.u.UnloadDll.lpBaseOfDll = NotificationData->Unloaded.DllBase;
} else
return;
pushDbgEvent(event);
}
bool XDbgProxy::initialize()
{
_evtQueueEvent = ::CreateEvent(NULL, TRUE, FALSE, NULL);
if (!(/* _threadHandled && _dllHandled && */ _evtQueueEvent)) {
assert(false);
return false;
}
if (!InitWin32ApiWrapper()) {
assert(false);
return false;
}
/* if (!createPipe())
return false; */
_vehCookie = AddVectoredExceptionHandler(1, &XDbgProxy::_VectoredHandler);
if (_vehCookie == NULL)
return false;
typedef VOID (CALLBACK *PLDR_DLL_NOTIFICATION_FUNCTION)(ULONG, PCLDR_DLL_NOTIFICATION_DATA, PVOID);
typedef NTSTATUS (NTAPI *LdrRegDllNotifFunc)(ULONG, PLDR_DLL_NOTIFICATION_FUNCTION, PVOID, PVOID *);
LdrRegDllNotifFunc LdrRegisterDllNotification = (LdrRegDllNotifFunc )GetProcAddress(
GetModuleHandle("ntdll.dll"), "LdrRegisterDllNotification");
if (LdrRegisterDllNotification) {
if (LdrRegisterDllNotification(0, &XDbgProxy::_LdrDllNotification, NULL, &_dllNotifCooike) != 0) {
// log error
assert(false);
}
}
MyTrace("%s(): starting thread.", __FUNCTION__);
_stopFlag = false;
if (!start()) {
assert(false);
return false;
}
if (!_apiThread.start()) {
assert(false);
return false;
}
return true;
}
// FIXME: it's not always right. Thread::stop might hang.
void XDbgProxy::stop()
{
assert(false);
_stopFlag = true;
Thread::stop(-1); // stop xdbg thread
typedef NTSTATUS (NTAPI *LdrUnregDllNotifFunc)(PVOID Cookie);
LdrUnregDllNotifFunc LdrUnregisterDllNotification = (LdrUnregDllNotifFunc)GetProcAddress(
GetModuleHandle("ntdll.dll"), "LdrUnregisterDllNotification");
if (LdrUnregisterDllNotification) {
LdrUnregisterDllNotification(_dllNotifCooike);
_dllNotifCooike = NULL;
}
RemoveVectoredExceptionHandler(_vehCookie);
_vehCookie = NULL;
UninitWin32ApiWrapper();
if (_hPipe != INVALID_HANDLE_VALUE) {
CloseHandle(_hPipe);
_hPipe = INVALID_HANDLE_VALUE;
}
if (_hApiPipe != INVALID_HANDLE_VALUE) {
CloseHandle(_hApiPipe);
_hApiPipe = INVALID_HANDLE_VALUE;
}
}
LONG CALLBACK XDbgProxy::VectoredHandler(PEXCEPTION_POINTERS ExceptionInfo)
{
// MyTrace("%s()", __FUNCTION__);
if (!_attached)
return EXCEPTION_CONTINUE_SEARCH;
DWORD currentTid = XDbgGetCurrentThreadId();
if (currentTid == getId() || currentTid == _apiThread.getId())
return EXCEPTION_CONTINUE_SEARCH;
if (ignore_dbgstr) {
if (ExceptionInfo->ExceptionRecord->ExceptionCode == DBG_PRINTEXCEPTION_C ||
ExceptionInfo->ExceptionRecord->ExceptionCode == DBG_PRINTEXCEPTION_WIDE_C) {
return EXCEPTION_CONTINUE_SEARCH;
}
}
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = XDbgGetCurrentThreadId();
msg.dwDebugEventCode = EXCEPTION_DEBUG_EVENT;
msg.u.Exception.ExceptionRecord.ExceptionInformation[0] = (ULONG_PTR )ExceptionInfo;
pushDbgEvent(event);
return _exceptHandleCode;
}
LONG CALLBACK XDbgProxy::AsyncVectoredHandler(DebugEventPacket& pkt)
{
// MyTrace("%s()", __FUNCTION__);
// MutexGuard guard(this);
if (threadIdToHandle(pkt.event.dwThreadId) == NULL) {
// assert(false);
return EXCEPTION_CONTINUE_SEARCH;
}
PEXCEPTION_POINTERS ExceptionInfo = (PEXCEPTION_POINTERS )pkt.event.u.Exception.
ExceptionRecord.ExceptionInformation[0];
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
msg.dwProcessId = pkt.event.dwProcessId;
msg.dwThreadId = pkt.event.dwThreadId;
if (ExceptionInfo->ExceptionRecord->ExceptionCode == DBG_PRINTEXCEPTION_C) {
msg.dwDebugEventCode = OUTPUT_DEBUG_STRING_EVENT;
msg.u.DebugString.fUnicode = 0;
msg.u.DebugString.nDebugStringLength = (WORD )ExceptionInfo->ExceptionRecord->ExceptionInformation[0];
msg.u.DebugString.lpDebugStringData = (LPSTR )ExceptionInfo->ExceptionRecord->ExceptionInformation[1];
} else if (ExceptionInfo->ExceptionRecord->ExceptionCode == DBG_PRINTEXCEPTION_WIDE_C) {
msg.dwDebugEventCode = OUTPUT_DEBUG_STRING_EVENT;
msg.u.DebugString.fUnicode = 1;
msg.u.DebugString.nDebugStringLength = (WORD)ExceptionInfo->ExceptionRecord->ExceptionInformation[0];
msg.u.DebugString.lpDebugStringData = (LPSTR)ExceptionInfo->ExceptionRecord->ExceptionInformation[1];
} else {
msg.dwDebugEventCode = EXCEPTION_DEBUG_EVENT;
if (_lastException == ExceptionInfo->ExceptionRecord &&
_lastExceptCode == ExceptionInfo->ExceptionRecord->ExceptionCode &&
_lastExceptAddr == ExceptionInfo->ExceptionRecord->ExceptionAddress) {
msg.u.Exception.dwFirstChance = 0;
} else
msg.u.Exception.dwFirstChance = 1;
msg.u.Exception.ExceptionRecord = *ExceptionInfo->ExceptionRecord;
_lastException = ExceptionInfo->ExceptionRecord;
_lastExceptCode = ExceptionInfo->ExceptionRecord->ExceptionCode;
_lastExceptAddr = ExceptionInfo->ExceptionRecord->ExceptionAddress;
};
event.ctx = *ExceptionInfo->ContextRecord;
DebugAckPacket ack;
if (!sendDbgEvent(event, ack)) {
// log error
return EXCEPTION_CONTINUE_SEARCH;
}
cloneThreadContext(ExceptionInfo->ContextRecord, &ack.ctx, ack.ContextFlags);
if ((ack.ContextFlags & CONTEXT_CONTROL) != CONTEXT_CONTROL) {
if (ExceptionInfo->ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT) {
if (ack.dwContinueStatus == DBG_CONTINUE) {
CTX_PC_REG(ExceptionInfo->ContextRecord) += 1;
}
}
}
if (ack.dwContinueStatus == DBG_CONTINUE)
return EXCEPTION_CONTINUE_EXECUTION;
return EXCEPTION_CONTINUE_SEARCH;
}
bool XDbgProxy::createEventPipe()
{
std::string name = makePipeName(XDbgGetCurrentProcessId());
_hPipe = ::CreateNamedPipe(name.c_str(), PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES, EVENT_MESSAGE_SIZE, CONTINUE_MESSAGE_SIZE, NMPWAIT_USE_DEFAULT_WAIT, NULL);
if (_hPipe == INVALID_HANDLE_VALUE)
return false;
return true;
}
bool XDbgProxy::createApiPipe()
{
std::string apiName = makeApiPipeName(XDbgGetCurrentProcessId());
_hApiPipe = ::CreateNamedPipe(apiName.c_str(), PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES, RETURN_MESSAGE_SIZE, CALL_MESSAGE_SIZE, NMPWAIT_USE_DEFAULT_WAIT, NULL);
if (_hApiPipe == INVALID_HANDLE_VALUE) {
CloseHandle(_hPipe);
_hPipe = INVALID_HANDLE_VALUE;
return false;
}
return true;
}
// SO, THIS MODULE MUST BE A DLL
BOOL XDbgProxy::DllMain(HMODULE hModule, DWORD reason, LPVOID lpReserved)
{
// MyTrace("%s()", __FUNCTION__);
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
switch (reason) {
case DLL_PROCESS_ATTACH:
{
/* char dllPath[MAX_PATH + 1];
GetModuleFileName(hModule, dllPath, sizeof(dllPath) - 1);
dllPath[sizeof(dllPath) - 1] = 0;
LoadLibrary(dllPath); */
}
// MyTrace("%s(): process(%u) xdbg proxy loaded. thread id: %u", __FUNCTION__,
// GetCurrentProcessId(), GetCurrentThreadId());
break;
case DLL_PROCESS_DETACH:
// MyTrace("%s(): process(%u) xdbg proxy unloaded. thread id: %u", __FUNCTION__,
// GetCurrentProcessId(), GetCurrentThreadId());
break;
case DLL_THREAD_ATTACH:
//MyTrace("%s(): process(%u) xdbg proxy attach thread. thread id: %u <<<", __FUNCTION__,
// XDbgGetCurrentProcessId(), XDbgGetCurrentThreadId());
if (!_attached)
return TRUE;
// REPORT CreateThread
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = XDbgGetCurrentThreadId();
msg.dwDebugEventCode = CREATE_THREAD_DEBUG_EVENT;
msg.u.CreateThread.hThread = NULL;
msg.u.CreateThread.lpStartAddress = (LPTHREAD_START_ROUTINE )
GetThreadStartAddress(XDbgGetCurrentThread());
msg.u.CreateThread.lpThreadLocalBase = NtCurrentTeb();
pushDbgEvent(event);
//MyTrace("%s(): process(%u) xdbg proxy attach thread. thread id: %u >>>", __FUNCTION__,
// GetCurrentProcessId(), GetCurrentThreadId());
break;
case DLL_THREAD_DETACH:
// REPORT ExitThread
//MyTrace("%s(): process(%u) xdbg proxy detach thread. thread id: %u <<<", __FUNCTION__,
// GetCurrentProcessId(), GetCurrentThreadId());
if (!_attached)
return TRUE;
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = XDbgGetCurrentThreadId();
msg.dwDebugEventCode = EXIT_THREAD_DEBUG_EVENT;
if (!GetExitCodeThread(XDbgGetCurrentThread(), &msg.u.ExitThread.dwExitCode))
msg.u.ExitThread.dwExitCode = 0;
pushDbgEvent(event);
//MyTrace("%s(): process(%u) xdbg proxy detach thread. thread id: %u >>>", __FUNCTION__,
// GetCurrentProcessId(), GetCurrentThreadId());
break;
};
return TRUE;
}
void XDbgProxy::waitForAttach()
{
while (!_attached) {
Sleep(0);
MemoryBarrier();
}
}
long XDbgProxy::run()
{
MyTrace("XDBG Thread started");
DWORD sleepTime = 0;
while (!_stopFlag) {
if (_attached) {
{
// MutexGuard guard(this);
DebugEventPacket event;
DebugAckPacket ack;
if (popDbgEvent(event)) {
MyTrace("%s(): eventId: %d, threadId: %d", __FUNCTION__, event.event.dwDebugEventCode,
event.event.dwThreadId);
switch (event.event.dwDebugEventCode) {
case EXCEPTION_DEBUG_EVENT:
_exceptHandleCode = AsyncVectoredHandler(event);
break;
case LOAD_DLL_DEBUG_EVENT:
if (!sendDbgEvent(event, ack)) {
break;
}
if (event.event.dwDebugEventCode == LOAD_DLL_DEBUG_EVENT) {
free(event.event.u.LoadDll.lpImageName);
}
break;
case UNLOAD_DLL_DEBUG_EVENT:
if (!sendDbgEvent(event, ack)) {
break;
}
break;
case CREATE_THREAD_DEBUG_EVENT:
if (threadIdToHandle(event.event.dwThreadId) != NULL) {
// reentry
break;
}
if (!sendDbgEvent(event, ack)) {
break;
}
addThread(event.event.dwThreadId);
break;
case EXIT_THREAD_DEBUG_EVENT:
if (threadIdToHandle(event.event.dwThreadId) == NULL) {
// reentry
break;;
}
if (!sendDbgEvent(event, ack)) {
break;
}
delThread(event.event.dwThreadId);
break;
default:
break;
}
SetEvent(_evtQueueEvent);
sleepTime = 0;
} else {
Sleep(sleepTime);
sleepTime ++;
if (sleepTime > 15) {
sleepTime = 15;
if (!PeekNamedPipe(_hPipe, NULL, 0, NULL, 0, NULL)) {
_attached = false;
CloseHandle(_hPipe);
_hPipe = INVALID_HANDLE_VALUE;
}
}
}
}
} else {
if (!createEventPipe()) {
continue;
}
if (!ConnectNamedPipe(_hPipe, NULL)) {
if (GetLastError() == ERROR_PIPE_CONNECTED) {
onDbgConnect();
_attached = true;
MyTrace("debugger attached");
continue;
} else {
MyTrace("%s(): ConnectNamedPipe(%p) failed. errCode: %d ", __FUNCTION__, _hPipe, GetLastError());
// assert(false);
// return -1;
CloseHandle(_hPipe);
_hPipe = INVALID_HANDLE_VALUE;
Sleep(100);
}
} else {
onDbgConnect();
_attached = true;
MyTrace("debugger attached");
}
}
}
return 0;
}
void XDbgProxy::onDbgConnect()
{
// MutexGuard guard(this);
clearThreads();
addAllThreads(XDbgGetCurrentThreadId());
delThread(_apiThread.getId());
suspendAll(XDbgGetCurrentThreadId());
DebugEventPacket event;
DebugAckPacket ack;
event.event.dwProcessId = XDbgGetCurrentProcessId();
event.event.dwThreadId = getFirstThread();
event.event.dwDebugEventCode = ATTACHED_EVENT; // THIS MSG DONT PASS TO DEBUGGER
sendDbgEvent(event, ack, false);
ignore_dbgstr = ack.args.ignore_dbgstr;
inject_method = ack.args.inject_method;
simu_attach_bp = ack.args.simu_attach_bp;
sendProcessInfo(ack.dwThreadId);
sendThreadInfo();
sendModuleInfo(ack.dwThreadId);
// attach breakpoint
if (simu_attach_bp && !ack.args.createProcess) {
DWORD tid;
HANDLE hThread = ::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)DebugBreak, NULL, 0, &tid);
CloseHandle(hThread);
}
resumeAll(XDbgGetCurrentThreadId());
}
void XDbgProxy::onDbgDisconnect()
{
MyTrace("%s()", __FUNCTION__);
// MutexGuard guard(this);
}
void XDbgProxy::sendProcessInfo(DWORD firstThread)
{
MyTrace("%s()", __FUNCTION__);
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
DebugAckPacket ack;
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = firstThread;
char modName[MAX_PATH + 1] = {0};
memset(&msg.u.CreateProcessInfo, 0, sizeof(msg.u.CreateProcessInfo));
msg.dwDebugEventCode = CREATE_PROCESS_DEBUG_EVENT;
msg.u.CreateProcessInfo.dwDebugInfoFileOffset = 0;
msg.u.CreateProcessInfo.fUnicode = 0;
msg.u.CreateProcessInfo.hFile = NULL;
msg.u.CreateProcessInfo.hProcess = NULL;
msg.u.CreateProcessInfo.hThread = NULL;
msg.u.CreateProcessInfo.lpBaseOfImage = (PVOID )GetModuleHandle(NULL);
GetModuleFileName(GetModuleHandle(NULL), modName, MAX_PATH);
msg.u.CreateProcessInfo.lpImageName = modName;
msg.u.CreateProcessInfo.lpStartAddress = (LPTHREAD_START_ROUTINE)GetThreadStartAddress(firstThread);
MyTrace("%s(): mod: %s, main thread start at: %p", __FUNCTION__, modName,
msg.u.CreateProcessInfo.lpStartAddress);
msg.u.CreateProcessInfo.lpThreadLocalBase = GetThreadTeb(firstThread);
msg.u.CreateProcessInfo.nDebugInfoSize = 0;
sendDbgEvent(event, ack, false);
}
void XDbgProxy::sendModuleInfo(DWORD firstThread)
{
MyTrace("%s()", __FUNCTION__);
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
DebugAckPacket ack;
msg.dwDebugEventCode = LOAD_DLL_DEBUG_EVENT;
msg.dwProcessId = XDbgGetCurrentProcessId();
msg.dwThreadId = firstThread;
char modName[MAX_PATH + 1] = {0};
HMODULE hMainModule = GetModuleHandle(NULL);
HMODULE hModules[512];
DWORD len;
if (!EnumProcessModules(XDbgGetCurrentProcess(), hModules, sizeof(hModules), &len)) {
// log error
assert(false);
return;
}
len /= sizeof(HMODULE);
MyTrace("%s(): module count: %d", __FUNCTION__, len);
for (DWORD i = 0; i < len; i++) {
if (hMainModule == hModules[i])
continue;
msg.u.LoadDll.dwDebugInfoFileOffset = 0;
msg.u.LoadDll.fUnicode = 0;
msg.u.LoadDll.hFile = NULL;
msg.u.LoadDll.lpBaseOfDll = hModules[i];
memset(modName, 0, sizeof(modName));
if (GetModuleFileName(hModules[i], modName, MAX_PATH) == 0 || modName[0] == '\0')
continue;
msg.u.LoadDll.lpImageName = modName;
sendDbgEvent(event, ack, false);
MyTrace("%s(): module: %s, %p", __FUNCTION__, modName, msg.u.LoadDll.lpBaseOfDll);
}
}
void XDbgProxy::sendThreadInfo()
{
MyTrace("%s()", __FUNCTION__);
DebugEventPacket event;
memset(&event, 0, sizeof(event));
DEBUG_EVENT& msg = event.event;
DebugAckPacket ack;
msg.dwDebugEventCode = CREATE_THREAD_DEBUG_EVENT;
msg.dwProcessId = XDbgGetCurrentProcessId();
DWORD threadId = getFirstThread();
while (threadId) {
msg.dwThreadId = threadId;
msg.u.CreateThread.hThread = NULL;
msg.u.CreateThread.lpStartAddress = (LPTHREAD_START_ROUTINE)
GetThreadStartAddress(threadId);
msg.u.CreateThread.lpThreadLocalBase = GetThreadTeb(threadId);
sendDbgEvent(event, ack, false);
threadId = getNextThread();
}
}
//////////////////////////////////////////////////////////////////////////
void XDbgProxy::registerRemoteApi()
{
_apiHandlers[ID_ReadProcessMemory] = &XDbgProxy::ReadProcessMemory;
_apiHandlers[ID_WriteProcessMemory] = &XDbgProxy::WriteProcessMemory;
_apiHandlers[ID_SuspendThread] = &XDbgProxy::SuspendThread;
_apiHandlers[ID_ResumeThread] = &XDbgProxy::ResumeThread;
_apiHandlers[ID_VirtualQueryEx] = &XDbgProxy::VirtualQueryEx;
_apiHandlers[ID_VirtualProtectEx] = &XDbgProxy::VirtualProtectEx;
_apiHandlers[ID_GetThreadContext] = &XDbgProxy::GetThreadContext;
_apiHandlers[ID_SetThreadContext] = &XDbgProxy::SetThreadContext;
_apiHandlers[ID_GetModuleFileNameExW] = &XDbgProxy::_GetModuleFileNameExW;
_apiHandlers[ID_CreateRemoteThread] = &XDbgProxy::CreateRemoteThread;
}
BOOL XDbgProxy::recvApiCall(ApiCallPacket& inPkt)
{
DWORD len;
if (!ReadFile(_hApiPipe, &inPkt, sizeof(inPkt), &len, NULL)) {
// assert(false);
return FALSE;
}
return TRUE;
}
BOOL XDbgProxy::sendApiReturn(const ApiReturnPakcet& outPkt)
{
DWORD len;
if (!WriteFile(_hApiPipe, &outPkt, sizeof(outPkt), &len, NULL)) {
return FALSE;
}
return TRUE;
}
long XDbgProxy::runApiLoop()
{
ApiCallPacket inPkt;
bool attached = false;
while (!_stopFlag) {
if (!attached) {
if (!createApiPipe()) {
Sleep(100);
continue;
}
if (!ConnectNamedPipe(_hApiPipe, NULL)) {
if (GetLastError() == ERROR_PIPE_CONNECTED) {
MyTrace("%s(): attached", __FUNCTION__);
attached = true;
} else {
MyTrace("%s(): ConnectNamedPipe() failed.", __FUNCTION__);
// assert(false);
// return -1;
CloseHandle(_hApiPipe);
_hApiPipe = INVALID_HANDLE_VALUE;
Sleep(100);
continue;
}
} else {
MyTrace("%s(): attached", __FUNCTION__);
attached = true;
}
}
if (!recvApiCall(inPkt)) {
// assert(false);
// return -1;
attached = false;
continue;
}
// MyTrace("%s(): ApiCall: id = %d", __FUNCTION__, inPkt.apiId);
RemoteApiHandlers::iterator it;
it = _apiHandlers.find(inPkt.apiId);
if (it == _apiHandlers.end()) {
assert(false);
// return -1;
continue;
}
RemoteApiHandler handler = it->second;
(this->*handler)(inPkt);
// MyTrace("%s(): ApiCall: id = %d completed", __FUNCTION__, inPkt.apiId);
}
return 0;
}
// #define _API_TRACE
void XDbgProxy::ReadProcessMemory(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
assert(inPkt.ReadProcessMemory.size <= MAX_MEMORY_BLOCK);
PVOID addr = inPkt.ReadProcessMemory.addr;
SIZE_T size = inPkt.ReadProcessMemory.size;
ApiReturnPakcet outPkt;
__try {
outPkt.ReadProcessMemory.result = ::ReadProcessMemory(GetCurrentProcess(), addr,
outPkt.ReadProcessMemory.buffer, size, &outPkt.ReadProcessMemory.size);
} __except (EXCEPTION_EXECUTE_HANDLER) {
outPkt.ReadProcessMemory.result = FALSE;
}
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): addr: %p, size: %d, result: %d, errno: %d", __FUNCTION__, addr, size,
outPkt.ReadProcessMemory.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::WriteProcessMemory(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
assert(inPkt.WriteProcessMemory.size <= MAX_MEMORY_BLOCK);
ApiReturnPakcet outPkt;
PVOID addr = inPkt.WriteProcessMemory.addr;
PUCHAR buffer = inPkt.WriteProcessMemory.buffer;
SIZE_T size = inPkt.WriteProcessMemory.size;
__try {
outPkt.WriteProcessMemory.result = ::WriteProcessMemory(GetCurrentProcess(), addr,
buffer, size, &outPkt.WriteProcessMemory.writtenSize);
}
__except (EXCEPTION_EXECUTE_HANDLER) {
outPkt.WriteProcessMemory.result = FALSE;
}
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): addr: %p, size: %d, result: %d, errno: %d", __FUNCTION__, addr, size,
outPkt.WriteProcessMemory.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::SuspendThread(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
ApiReturnPakcet outPkt;
HANDLE hThread;
#ifdef _DEBUG
if (inPkt.SuspendThread.threadId == getId() || inPkt.SuspendThread.threadId == _apiThread.getId()) {
// log error
assert(false);
outPkt.SuspendThread.result = -1;
SetLastError(ERROR_INVALID_PARAMETER);
sendApiReturn(outPkt);
}
#endif
hThread = threadIdToHandle(inPkt.SuspendThread.threadId);
if (hThread == NULL) {
outPkt.SuspendThread.result = -1;
SetLastError(ERROR_INVALID_PARAMETER);
} else {
outPkt.SuspendThread.result = ::SuspendThread(hThread);
}
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): threadId: %d, result: %d, errno: %d", __FUNCTION__,
inPkt.SuspendThread.threadId, outPkt.SuspendThread.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::ResumeThread(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
ApiReturnPakcet outPkt;
HANDLE hThread;
#ifdef _DEBUG
if (inPkt.SuspendThread.threadId == getId() || inPkt.SuspendThread.threadId == _apiThread.getId()) {
// log error
assert(false);
outPkt.ResumeThread.result = -1;
SetLastError(ERROR_INVALID_PARAMETER);
sendApiReturn(outPkt);
}
#endif
hThread = threadIdToHandle(inPkt.SuspendThread.threadId);
if (hThread == NULL) {
// when the thread create by suspend flag, it's not in the thread list
hThread = OpenThread(THREAD_ALL_ACCESS, FALSE, inPkt.SuspendThread.threadId);
if (hThread == NULL) {
outPkt.ResumeThread.result = -1;
SetLastError(ERROR_INVALID_PARAMETER);
} else {
outPkt.ResumeThread.result = ::ResumeThread(hThread);
CloseHandle(hThread);
}
} else {
outPkt.ResumeThread.result = ::ResumeThread(hThread);
}
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): threadId: %d, result: %d, errno: %d", __FUNCTION__,
inPkt.ResumeThread.threadId, outPkt.ResumeThread.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::VirtualQueryEx(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
ApiReturnPakcet outPkt;
outPkt.VirtualQueryEx.result = ::VirtualQuery(inPkt.VirtualQueryEx.addr, &outPkt.VirtualQueryEx.memInfo,
sizeof(outPkt.VirtualQueryEx.memInfo));
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): addr: %p, result: %d, errno: %d", __FUNCTION__, inPkt.VirtualQueryEx.addr,
outPkt.VirtualQueryEx.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::GetThreadContext(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
ApiReturnPakcet outPkt;
HANDLE hThread;
hThread = threadIdToHandle(inPkt.SuspendThread.threadId);
if (hThread == NULL || hThread == (HANDLE )-1) {
outPkt.GetThreadContext.result = FALSE;
SetLastError(ERROR_INVALID_PARAMETER);
MyTrace("%s(): cannot found the threadId: %d", __FUNCTION__, inPkt.GetThreadContext.threadId);
} else {
outPkt.GetThreadContext.ctx.ContextFlags = inPkt.GetThreadContext.contextFlags;
outPkt.GetThreadContext.result = ::GetThreadContext(hThread, &outPkt.GetThreadContext.ctx);
}
outPkt.lastError = GetLastError();
#ifdef _API_TRACE
MyTrace("%s(): th: %x, tid: %d, result: %d, errno: %d", __FUNCTION__, hThread,
inPkt.GetThreadContext.threadId, outPkt.GetThreadContext.result, outPkt.lastError);
#endif
sendApiReturn(outPkt);
}
void XDbgProxy::SetThreadContext(ApiCallPacket& inPkt)
{
// MyTrace("%s()", __FUNCTION__);
ApiReturnPakcet outPkt;
HANDLE hThread;
#ifdef _DEBUG
if (inPkt.SuspendThread.threadId == getId() || inPkt.SuspendThread.threadId == _apiThread.getId()) {
// log error
assert(false);
outPkt.SetThreadContext.result = -1;