Lazarus Debugger Implementation

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Introduction

This page provides an overview of how the debugger is implemented in the Lazarus IDE.

The debugger comprises the following parts:

Debugger-Frontend

The controls (run, step, stop buttons) and dialogs (watches, stack) in the IDE.

Debugger-Interface

A set of base-classes defining the communication between the front-end and each back-end

Debugger-Backend

Any code to control the debugged app, and retrieve/modify data from/in that app. The back-end may itself be split into an IDE back-end and an external back-end (e.g. gdb).

Debugger-Frontend

The code for the debugger frontend belongs currently directly to the IDE (to the project ide/lazarus.lpi). It is not a package of it's own.

Some of this code may one day be moved into a package. And maybe even introduce a package DebuggerFrontendIntf, to allow alternative 3rd party front-ends.

The code currently is located in

• folder /debugger
• folder /ide, files: debugmanager.pas and basedebugmanager.pas
• folders ide/frames and debugger/frames for configuration settings.

BaseDebugManager is currently based on components\debuggerintf\dbgintfdebuggerbase.pp

Debugger-Interface

components\debuggerintf\

Debugger-Backend

GDB / GDBMI based

components\lazdebuggergdbmi

LLDB

components\lazdebuggers\LazDebuggerLldb components\lazdebuggers\LazDebuggerFpLldb

FpDebug

components\lazdebuggers\LazDebuggerFp