bool DebugFrontend::InitializeBackend(const char* symbolsDirectory)
{
if (GetIsBeingDebugged(m_processId))
{
MessageEvent("Error: The process cannot be debugged because it contains hooks from a previous session", MessageType_Error);
return false;
}
char eventChannelName[256];
_snprintf(eventChannelName, 256, "Decoda.Event.%x", m_processId);
char commandChannelName[256];
_snprintf(commandChannelName, 256, "Decoda.Command.%x", m_processId);
// Setup communication channel with the process that is used to receive events
// back to the frontend.
if (!m_eventChannel.Create(eventChannelName))
{
return false;
}
// Setup communication channel with the process that is used to send commands
// to the backend.
if (!m_commandChannel.Create(commandChannelName))
{
return false;
}
// Inject our debugger DLL into the process so that we can monitor from
// inside the process's memory space.
if (!InjectDll(m_processId, "LuaInject.dll"))
{
MessageEvent("Error: LuaInject.dll could not be loaded into the process", MessageType_Error);
return false;
}
// Wait for the client to connect.
m_eventChannel.WaitForConnection();
// Read the initialization function from the event channel.
if (!ProcessInitialization(symbolsDirectory))
{
MessageEvent("Error: Backend couldn't be initialized", MessageType_Error);
return false;
}
m_state = State_Running;
// Start a new thread to handle the incoming event channel.
DWORD threadId;
m_eventThread = CreateThread(NULL, 0, StaticEventThreadProc, this, 0, &threadId);
return true;
}
void wxGISStatusBar::SetMessage(const wxString& text, int i)
{
wxCommandEvent MessageEvent( wxEVT_COMMAND_BUTTON_CLICKED ); // Keep it simple, don't give a specific event ID
MessageEvent.SetString(text);
MessageEvent.SetInt(i);
wxPostEvent(this, MessageEvent);
}
void CTriggerEvent::MessageEvent(ETriggerStateType eType, uint32 uFromID, uint32 uToID, ESpecialEventType eArg1, bool bArg2)
{
CEntityServer* pEntityFrom = CEntityServerManager::GetEntityByID(uFromID);
CFighterDictator* pFrom = pEntityFrom ? pEntityFrom->GetFighter() : NULL;
CEntityServer* pEntityTo = CEntityServerManager::GetEntityByID(uToID);
CFighterDictator* pTo = pEntityTo ? pEntityTo->GetFighter() : NULL;
MessageEvent(eType, pFrom, pTo, eArg1, bArg2);
}
void CTriggerEvent::MessageEvent(ETriggerStateType eType, uint32 uFromID, uint32 uToID, EHurtResult eArg1, bool bArg2, ESkillType eArg3, EAttackType eArg4)
{
CEntityServer* pEntityFrom = CEntityServerManager::GetEntityByID(uFromID);
CFighterDictator* pFrom = pEntityFrom ? pEntityFrom->GetFighter() : NULL;
CEntityServer* pEntityTo = CEntityServerManager::GetEntityByID(uToID);
CFighterDictator* pTo = pEntityTo ? pEntityTo->GetFighter() : NULL;
MessageEvent(eType, pFrom, pTo, eArg1, bArg2, eArg3, eArg4);
}
void DebugFrontend::OutputError(DWORD error)
{
char buffer[1024];
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, error, 0, buffer, 1024, NULL))
{
std::string message = "Error: ";
message += buffer;
MessageEvent(message, MessageType_Error);
}
}
void Hud::AddMessageEvent(char* string) {
MessageEvent message = MessageEvent();
message.type = MESSAGEEVENT;
strcpy(message.string,string);
mMessageEvents.push_back(message);
if (mMessageEvents.size() > 9) {
mMessageEvents.erase(mMessageEvents.begin());
}
if (mMessageEventCounter < 3) {
mMessageEventCounter++;
mMessageEventTimer = 0;
}
}
void Hud::AddChatEvent(char* name, char* string, int team, bool isdead, bool isteamonly) {
MessageEvent message = MessageEvent();
message.type = CHATEVENT;
strcpy(message.chatevent.name,name);
strcpy(message.chatevent.string,string);
message.chatevent.team = team;
message.chatevent.isDead = isdead;
message.chatevent.isTeamOnly = isteamonly;
mMessageEvents.push_back(message);
if (mMessageEvents.size() > 9) {
mMessageEvents.erase(mMessageEvents.begin());
}
if (mMessageEventCounter < 3) {
mMessageEventCounter++;
mMessageEventTimer = 0;
}
}
bool DebugFrontend::Attach(unsigned int processId, const char* symbolsDirectory)
{
m_processId = processId;
m_process = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processId);
if (m_process == NULL)
{
MessageEvent("Error: The process could not be opened", MessageType_Error);
m_processId = 0;
return false;
}
if (!InitializeBackend(symbolsDirectory))
{
CloseHandle(m_process);
m_process = NULL;
m_processId = 0;
return false;
}
return true;
}
bool DebugFrontend::Start(const char* command, const char* commandArguments, const char* currentDirectory, const char* symbolsDirectory, bool debug, bool startBroken)
{
Stop(false);
STARTUPINFO startUpInfo = { 0 };
startUpInfo.cb = sizeof(startUpInfo);
char commandLine[8191];
_snprintf(commandLine, sizeof(commandLine), "\"%s\" %s", command, commandArguments);
// If no directory was specified, then use the directory from the exe.
std::string directory = TrimSpaces(currentDirectory);
if (directory.empty())
{
directory = GetDirectory(command);
}
PROCESS_INFORMATION processInfo;
if (debug)
{
if (!StartProcessAndRunToEntry(command, commandLine, directory.c_str(), processInfo))
{
return false;
}
}
else
{
if (!CreateProcess(NULL, commandLine, NULL, NULL, TRUE, 0, NULL, directory.c_str(), &startUpInfo, &processInfo))
{
OutputError(GetLastError());
return false;
}
// We're not debugging, so no need to proceed.
CloseHandle(processInfo.hThread);
CloseHandle(processInfo.hProcess);
return true;
}
DWORD exitCode;
if (GetExitCodeProcess(processInfo.hProcess, &exitCode) && exitCode != STILL_ACTIVE)
{
MessageEvent("The process has terminated unexpectedly", MessageType_Error);
return false;
}
m_process = processInfo.hProcess;
m_processId = processInfo.dwProcessId;
if (!InitializeBackend(symbolsDirectory))
{
Stop(true);
return false;
}
if (startBroken)
{
Break(0);
}
// Now that our initialization is complete, let the process run.
ResumeThread(processInfo.hThread);
CloseHandle(processInfo.hThread);
return true;
}
bool DebugFrontend::StartProcessAndRunToEntry(LPCSTR exeFileName, LPSTR commandLine, LPCSTR directory, PROCESS_INFORMATION& processInfo)
{
STARTUPINFO startUpInfo = { 0 };
startUpInfo.cb = sizeof(startUpInfo);
ExeInfo info;
if (!GetExeInfo(exeFileName, info) || info.entryPoint == 0)
{
MessageEvent("Error: The entry point for the application could not be located", MessageType_Error);
return false;
}
if (!info.i386)
{
MessageEvent("Error: Debugging 64-bit applications is not supported", MessageType_Error);
return false;
}
DWORD flags = DEBUG_PROCESS | DEBUG_ONLY_THIS_PROCESS;
if (!CreateProcess(NULL, commandLine, NULL, NULL, TRUE, flags, NULL, directory, &startUpInfo, &processInfo))
{
OutputError(GetLastError());
return false;
}
// Running to the entry point currently doesn't work for managed applications, so
// just start it up.
if (!info.managed)
{
unsigned long entryPoint = info.entryPoint;
BYTE breakPointData;
bool done = false;
while (!done)
{
DEBUG_EVENT debugEvent;
WaitForDebugEvent(&debugEvent, INFINITE);
DWORD continueStatus = DBG_EXCEPTION_NOT_HANDLED;
if (debugEvent.dwDebugEventCode == EXCEPTION_DEBUG_EVENT)
{
if (debugEvent.u.Exception.ExceptionRecord.ExceptionCode == EXCEPTION_SINGLE_STEP ||
debugEvent.u.Exception.ExceptionRecord.ExceptionCode == EXCEPTION_BREAKPOINT)
{
CONTEXT context;
context.ContextFlags = CONTEXT_FULL;
GetThreadContext(processInfo.hThread, &context);
if (context.Eip == entryPoint + 1)
{
// Restore the original code bytes.
SetBreakpoint(processInfo.hProcess, (LPVOID)entryPoint, false, &breakPointData);
done = true;
// Backup the instruction pointer so that we execute the original instruction.
--context.Eip;
SetThreadContext(processInfo.hThread, &context);
// Suspend the thread before we continue the debug event so that the program
// doesn't continue to run.
SuspendThread(processInfo.hThread);
}
continueStatus = DBG_CONTINUE;
}
}
else if (debugEvent.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
{
done = true;
}
else if (debugEvent.dwDebugEventCode == CREATE_PROCESS_DEBUG_EVENT)
{
// Offset the entry point by the load address of the process.
entryPoint += reinterpret_cast<size_t>(debugEvent.u.CreateProcessInfo.lpBaseOfImage);
// Write a break point at the entry point of the application so that we
// will stop when we reach that point.
SetBreakpoint(processInfo.hProcess, reinterpret_cast<void*>(entryPoint), true, &breakPointData);
CloseHandle(debugEvent.u.CreateProcessInfo.hFile);
}
else if (debugEvent.dwDebugEventCode == LOAD_DLL_DEBUG_EVENT)
{
CloseHandle(debugEvent.u.LoadDll.hFile);
}
ContinueDebugEvent(debugEvent.dwProcessId, debugEvent.dwThreadId, continueStatus);
}
}
DebugActiveProcessStop(processInfo.dwProcessId);
return true;
}
