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//===-- MICmdBase.h ---------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#pragma once
// C Includes
// C++ Includes
#include <functional> // for function
// Other libraries and framework includes
#include "lldb/API/SBError.h"
// Project includes
#include "MICmdArgSet.h"
#include "MICmdData.h"
#include "MICmdFactory.h"
#include "MICmdInvoker.h"
#include "MICmnBase.h"
#include "MICmnMIResultRecord.h"
#include "MICmnResources.h"
#include "MIUtilString.h"
// Declarations:
class CMICmnLLDBDebugSessionInfo;
//++
//============================================================================
// Details: MI command base class. MI commands derive from this base class.
// The Command Factory creates command objects and passes them to the
// Command Invoker. The Invoker takes ownership of any commands created
// which means it is the only object to delete them when a command is
// finished working. Commands do not delete themselves.
// There are two types of command implicitly defined by the state of
// the m_bWaitForEventFromSBDebugger flag. There is the event type
// command which registers (command fn) callbacks with the SBListener
// does some work then wakes up again when called back, does more work
// perhaps, ends, then the Invoker calls the command's Acknowledge
// function. The other type of command is one that just does some work,
// ends, then the Invoker calls the command's Acknowledge function. No
// events set up.
// A command's Execute(), Acknowledge() and event callback functions
// are
// carried out in the main thread.
// A command may use the argument derived object classes
// (CMICmdArgValBase)
// to factor handling and parsing of different types of arguments
// presented to a command. A command will produce an error should it
// be presented with arguments or options it does not understand.
//--
class CMICmdBase : public CMICmnBase,
public CMICmdInvoker::ICmd,
public CMICmdFactory::ICmd {
// Methods:
public:
CMICmdBase();
// Overridden:
// From CMICmdInvoker::ICmd
const SMICmdData &GetCmdData() const override;
const CMIUtilString &GetErrorDescription() const override;
void SetCmdData(const SMICmdData &vCmdData) override;
void CmdFinishedTellInvoker() const override;
const CMIUtilString &GetMIResultRecord() const override;
const CMIUtilString &GetMIResultRecordExtra() const override;
bool HasMIResultRecordExtra() const override;
bool ParseArgs() override;
// From CMICmdFactory::ICmd
const CMIUtilString &GetMiCmd() const override;
CMICmdFactory::CmdCreatorFnPtr GetCmdCreatorFn() const override;
virtual MIuint GetGUID();
void AddCommonArgs();
// Overrideable:
~CMICmdBase() override;
virtual bool GetExitAppOnCommandFailure() const;
// Methods:
protected:
void SetError(const CMIUtilString &rErrMsg);
bool HandleSBError(const lldb::SBError &error,
const std::function<bool()> &successHandler =
[] { return MIstatus::success; },
const std::function<void()> &errorHandler = [] {});
bool HandleSBErrorWithSuccess(const lldb::SBError &error,
const std::function<bool()> &successHandler);
bool HandleSBErrorWithFailure(const lldb::SBError &error,
const std::function<void()> &errorHandler);
template <class T> T *GetOption(const CMIUtilString &vStrOptionName);
bool ParseValidateCmdOptions();
// Attributes:
CMICmdFactory::CmdCreatorFnPtr m_pSelfCreatorFn;
CMIUtilString m_strCurrentErrDescription; // Reason for Execute or Acknowledge
// function failure
SMICmdData m_cmdData; // Holds information/status of *this command. Used by
// other MI code to report or determine state of a
// command.
bool m_bWaitForEventFromSBDebugger; // True = yes event type command wait,
// false = command calls Acknowledge()
// straight after Execute()
// no waiting
CMIUtilString
m_strMiCmd; // The MI text identifying *this command i.e. 'break-insert'
CMICmnMIResultRecord m_miResultRecord; // This is completed in the
// Acknowledge() function and returned
// to the Command Invoker to proceed
// stdout output. Each command forms 1 response to its input.
CMIUtilString m_miResultRecordExtra; // This is completed in the Acknowledge()
// function and returned to the Command
// Invoker to proceed
// stdout output. Hack command produce more response text to help the client
// because of using LLDB
CMICmnLLDBDebugSessionInfo &m_rLLDBDebugSessionInfo; // Access to command
// sharing information or
// data across any and
// all command based
// derived classes.
bool m_bHasResultRecordExtra; // True = Yes command produced additional MI
// output to its 1 line response, false = no
// extra MI output
// formed.
CMICmdArgSet m_setCmdArgs; // The list of arguments *this command needs to
// parse from the options string to carry out work.
const CMIUtilString m_constStrArgThreadGroup;
const CMIUtilString m_constStrArgThread;
const CMIUtilString m_constStrArgFrame;
const CMIUtilString m_constStrArgConsume;
// These 3 members can be used by the derived classes to make any of
// "thread", "frame" or "thread-group" mandatory.
bool m_ThreadGrpArgMandatory;
bool m_ThreadArgMandatory;
bool m_FrameArgMandatory;
};
//++
//------------------------------------------------------------------------------------
// Details: Retrieve the command argument or option object pointer so that it
// can be
// examined. If the option found and valid get the value (number,
// string or list
// - see CMICmdArgValBase class) from it to use with the command's
// decision
// making. If the argument is not found the command's error description
// is set
// describing the error condition.
// Type: Template method.
// Args: vStrOptionName - (R) The text name of the argument or option to
// search for in
// the list of the command's possible arguments
// or options.
// Return: T * - CMICmdArgValBase derived object.
// - nullptr = function has failed, unable to retrieve the
// option/arg object.
// Throws: None.
//--
template <class T>
T *CMICmdBase::GetOption(const CMIUtilString &vStrOptionName) {
CMICmdArgValBase *pPtrBase = nullptr;
if (!m_setCmdArgs.GetArg(vStrOptionName, pPtrBase)) {
SetError(CMIUtilString::Format(MIRSRC(IDS_CMD_ERR_OPTION_NOT_FOUND),
m_cmdData.strMiCmd.c_str(),
vStrOptionName.c_str()));
return nullptr;
}
return static_cast<T *>(pPtrBase);
}
//++
//------------------------------------------------------------------------------------
// Details: Retrieve the command argument or option object pointer using
// template function
// CMICmdBase::GetOption(). Should the argument (by name) not be found
// the
// command will exit with a failure (set in GetOption()).
// Type: Preprocessor macro.
// Args: a - (R) The actual variable's name.
// b - (R) The type of variable (appended to CMICmdArgVal i.e.
// CMICmdArgValString).
// c - (R) The text name of the argument or option to search for in
// the list of
// the command's possible arguments or options.
// Return: T * - CMICmdArgValBase derived object.
// - nullptr = function has failed, unable to retrieve the
// option/arg object.
// Throws: None.
//--
#define CMICMDBASE_GETOPTION(a, b, c) \
CMICmdArgVal##b *a = CMICmdBase::GetOption<CMICmdArgVal##b>(c); \
if (a == nullptr) \
return MIstatus::failure;
// This comment is to stop compile warning for #define
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