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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include "common.h"
#include "iinterfacepointer.h"
#include <memory>
#include <map>
class LocalsSymbolGroup;
class WatchesSymbolGroup;
class OutputCallback;
class EventCallback;
class ExtensionCommandContext;
// Global parameters
struct Parameters
{
unsigned maxStringLength = 10000;
unsigned maxArraySize = 100;
unsigned maxStackDepth = 1000;
unsigned firstChanceException = 1;
unsigned secondChanceException = 1;
};
// Global singleton with context.
// Caches a symbolgroup per frame and thread as long as the session is accessible.
class ExtensionContext {
ExtensionContext(const ExtensionContext&);
ExtensionContext& operator=(const ExtensionContext&);
ExtensionContext() = default;
public:
enum CallFlags {
CallWithExceptionsHandled = 0x1,
CallWithExceptionsNotHandled = 0x2
};
// Key used to report stop reason in StopReasonMap
static const char *stopReasonKeyC;
static const char *breakPointStopReasonC; // pre-defined stop reasons
// Map of parameters reported with the next stop as GDBMI
typedef std::map<std::string, std::string> StopReasonMap;
~ExtensionContext();
static ExtensionContext &instance();
// Call from DLL initialization.
HRESULT initialize(PULONG Version, PULONG Flags);
// Hook up our Event and Output callbacks that report exceptions and events.
// Call this from the first extension command that gets a client.
// Does not work when called from initialization.
void hookCallbacks(CIDebugClient *client);
// Undo hooking.
void unhookCallbacks();
// CDB has a limitation on output, so, long messages need to be split (empirically ca 10KB)
static const size_t outputChunkSize = 10240;
/* Report output in standardized format understood by Qt Creator.
* '<qtcreatorcdbext>|R|<token>|remainingChunks|<serviceName>|<one-line-output>'.
* Char code is 'R' command reply, 'N' command fail, 'E' event notification,
* 'X' exception, error. If the message is larger than outputChunkSize,
* it needs to be split up in chunks, remainingChunks needs to indicate the number
* of the following chunks (0 for just one chunk). */
bool report(char code, int token, int remainingChunks, const char *serviceName, PCSTR Format, ...);
// Convenience for reporting potentially long messages in chunks
bool reportLong(char code, int token, const char *serviceName, const std::string &message);
ULONG executionStatus() const;
// Call from notify handler, tell engine about state.
void notifyState(ULONG Notify);
// register as '.idle_cmd' to notify creator about stop
void notifyIdleCommand(CIDebugClient *client);
// Return symbol group for frame (cached as long as frame/thread do not change).
LocalsSymbolGroup *symbolGroup(CIDebugSymbols *symbols, ULONG threadId, int frame, std::string *errorMessage);
int symbolGroupFrame() const;
void discardSymbolGroup();
WatchesSymbolGroup *watchesSymbolGroup(CIDebugSymbols *symbols, std::string *errorMessage);
WatchesSymbolGroup *watchesSymbolGroup() const; // Do not create.
void discardWatchesSymbolGroup();
// Set a stop reason to be reported with the next idle notification (exception).
void setStopReason(const StopReasonMap &, const std::string &reason = std::string());
void startRecordingOutput();
std::wstring stopRecordingOutput();
// Execute a function call and record the output.
bool call(const std::string &functionCall, unsigned callFlags, std::wstring *output, std::string *errorMessage);
CIDebugClient *hookedClient() const { return m_hookedClient; }
const Parameters ¶meters() const { return m_parameters; }
Parameters ¶meters() { return m_parameters; }
ULONG64 jsExecutionEngine(ExtensionCommandContext &exc, std::string *errorMessage);
bool stateNotification() const { return m_stateNotification; }
void setStateNotification(bool s) { m_stateNotification = s; }
struct CdbVersion
{
int major = 0;
int minor = 0;
int patch = 0;
void clear () { major = minor = patch = 0; }
};
CdbVersion cdbVersion();
private:
bool isInitialized() const;
IInterfacePointer<CIDebugControl> m_control;
std::unique_ptr<LocalsSymbolGroup> m_symbolGroup;
std::unique_ptr<WatchesSymbolGroup> m_watchesSymbolGroup;
CIDebugClient *m_hookedClient = nullptr;
IDebugEventCallbacks *m_oldEventCallback = nullptr;
IDebugOutputCallbacksWide *m_oldOutputCallback = nullptr;
EventCallback *m_creatorEventCallback = nullptr;
OutputCallback *m_creatorOutputCallback = nullptr;
StopReasonMap m_stopReason;
bool m_stateNotification = true;
Parameters m_parameters;
};
// Context for extension commands to be instantiated on stack in a command handler.
// Provides the IDebug objects on demand.
class ExtensionCommandContext
{
ExtensionCommandContext(const ExtensionCommandContext&);
ExtensionCommandContext &operator=(const ExtensionCommandContext&);
public:
explicit ExtensionCommandContext(CIDebugClient *Client);
~ExtensionCommandContext();
// For accessing outside commands. Might return 0, based on the
// assumption that there is only once instance active.
static ExtensionCommandContext *instance();
CIDebugControl *control();
CIDebugSymbols *symbols();
CIDebugSystemObjects *systemObjects();
CIDebugAdvanced *advanced();
CIDebugRegisters *registers();
CIDebugDataSpaces *dataSpaces();
ULONG threadId();
private:
static ExtensionCommandContext *m_instance;
CIDebugClient *m_client;
IInterfacePointer<CIDebugControl> m_control;
IInterfacePointer<CIDebugSymbols> m_symbols;
IInterfacePointer<CIDebugAdvanced> m_advanced;
IInterfacePointer<CIDebugSystemObjects> m_systemObjects;
IInterfacePointer<CIDebugRegisters> m_registers;
IInterfacePointer<CIDebugDataSpaces> m_dataSpaces;
};
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