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310 lines
8.3 KiB
ObjectPascal
310 lines
8.3 KiB
ObjectPascal
{ $Id$ }
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{ ----------------------------------------------
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CMDLineDebugger.pp - Debugger class for
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commandline debuggers
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----------------------------------------------
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@created(Wed Feb 28st WET 2001)
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@lastmod($Date$)
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@author(Marc Weustink <marc@@lazarus.dommelstein.net>)
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This unit contains the Commandline debugger class for external commandline
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debuggers.
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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}
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unit CmdLineDebugger;
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{$mode objfpc}
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{$H+}
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interface
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uses
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Classes, Process, Debugger{, strmlsnr};
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type
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TCmdLineDebugger = class(TDebugger)
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private
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FTargetProcess: TProcess; // The target process to be debugged
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FDbgProcess: TProcess; // The process used to call the debugger
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FTargetOutputBuf: String; // Tempbuffer for process output
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FOutputLines: TStringList; // Debugger output
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procedure GetOutput;
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protected
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WaitPrompt: String; // Prompt to wait for
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procedure CreateDebugProcess(const AName: String);
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procedure CreateTargetProcess(const AName: String);
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procedure KillTargetProcess;
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procedure SendCmdLn(const ACommand: String; const AGetOutput: Boolean); overload;
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procedure SendCmdLn(const ACommand: String; Values: array of const; const AGetOutput: Boolean); overload;
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property TargetProcess: TProcess read FTargetProcess;
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property DebugProcess: TProcess read FDbgProcess;
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property OutputLines: TStringList read FOutputLines;
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public
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constructor Create; override;
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destructor Destroy; override;
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procedure TestCmd(const ACommand: String); // For internal debugging purposes
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end;
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procedure SendBreak(const AHandle: Integer);
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implementation
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uses
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Linux,
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SysUtils, Forms;
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//////////////////////////////////////////////////
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// Needs to go to proper include
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// Platform dependent
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//////////////////////////////////////////////////
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{------------------------------------------------------------------------------
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Function: SendBreak
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Params: AHandle THe handle of the proces tosend break to
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Returns:
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------------------------------------------------------------------------------}
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procedure SendBreak(const AHandle: Integer);
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begin
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if AHandle <> 0
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then Kill(AHandle, SIGINT);
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end;
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{------------------------------------------------------------------------------
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Function: WaitForHandles
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Params: AHandles: A set of handles to wait for (max 32)
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Returns: BitArray of handles set, 0 when an error ocoured
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------------------------------------------------------------------------------}
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function WaitForHandles(const AHandles: array of Integer): Integer;
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var
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n, R, Max, Count: Integer;
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TimeOut: Integer;
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FDSWait, FDS: TFDSet;
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begin
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Result := 0;
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Max := 0;
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Count := High(AHandles);
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if Count < 0 then Exit;
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if Count > 31 then Count := 31;
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FD_ZERO(FDS);
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for n := 0 to Count do
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begin
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if Max < AHandles[n] then Max := AHandles[n];
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if AHandles[n] <> 0
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then FD_Set(AHandles[n], FDS);
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end;
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repeat
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FDSWait := FDS;
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TimeOut := 10;
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R := Select(Max + 1, @FDSWait, nil, nil, TimeOut);
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Application.ProcessMessages;
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until R <> 0;
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if R > 0
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then begin
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for n := 0 to Count do
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if (AHandles[n] <> 0)
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and (FD_ISSET(AHandles[n], FDSWait))
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then begin
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Result := Result or 1 shl n;
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Dec(R);
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if R=0 then Break;
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end;
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end;
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end;
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//////////////////////////////////////////////////
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//////////////////////////////////////////////////
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// Tools and utilities
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//
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//////////////////////////////////////////////////
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function GetLine(var ABuffer: String): String;
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var
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idx: Integer;
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begin
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idx := Pos(#10, ABuffer);
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if idx = 0
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then Result := ''
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else begin
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Result := Copy(ABuffer, 1, idx);
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Delete(ABuffer, 1, idx);
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end;
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end;
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function StripLN(const ALine: String): String;
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var
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idx: Integer;
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begin
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idx := Pos(#10, ALine);
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if idx = 0
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then Result := ''
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else begin
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if (idx > 1)
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and (ALine[idx - 1] = #13)
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then Dec(idx);
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Result := Copy(ALine, 1, idx - 1);
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end;
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end;
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//////////////////////////////////////////////////
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{ TCmdLineDebugger }
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constructor TCmdLineDebugger.Create;
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begin
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FDbgProcess := nil;
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FTargetProcess := nil;
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FOutputLines := TStringList.Create;
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FTargetOutputBuf := '';
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inherited Create;
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end;
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procedure TCmdLineDebugger.CreateDebugProcess(const AName:String);
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begin
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if FDbgProcess = nil
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then begin
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FDbgProcess := TProcess.Create(AName, [poUsePipes, poNoConsole, poExecuteOnCreate]);
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WriteLn('[TCmdLineDebugger] Debug PID: ', FDbgProcess.Handle);
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GetOutput;
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end;
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end;
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procedure TCmdLineDebugger.CreateTargetProcess(const AName:String);
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begin
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// TODO: Better cleanup
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FTargetProcess.Free;
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FTargetProcess := TProcess.Create(AName, [poUsePipes, poNoConsole, poExecuteOnCreate, poRunSuspended]);
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WriteLN('[TCmdLineDebugger] Target PID = ', FTargetProcess.Handle);
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end;
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destructor TCmdLineDebugger.Destroy;
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begin
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inherited;
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FDbgProcess.Free;
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FTargetProcess.Free;
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end;
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procedure TCmdLineDebugger.GetOutput;
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function ReadData(const AStream: TStream; var ABuffer: String): Integer;
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var
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S: String;
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begin
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SetLength(S, 1024);
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Result := AStream.Read(S[1], 1024);
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if Result > 0
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then begin
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SetLength(S, Result);
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ABuffer := ABuffer + S;
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end;
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end;
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var
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OutputBuf: String;
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Line: String;
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OutHandle: Integer;
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WaitSet: Integer;
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Count: Integer;
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begin
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WriteLN('[GetOutput] Enter');
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if (FTargetProcess = nil)
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then OutHandle := 0
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else OutHandle := FTargetProcess.Output.Handle;
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OutputBuf := '';
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Line := '';
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OutputLines.Clear;
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repeat
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WaitSet := WaitForHandles([FDbgProcess.Output.Handle, OutHandle]);
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if WaitSet = 0
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then begin
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WriteLN('[Getoutput] Error waiting ');
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SetState(dsError);
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Break;
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end;
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if ((WaitSet and 1) <> 0) and (FDbgProcess <> nil)
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then begin
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Count := ReadData(FDbgProcess.Output, OutputBuf);
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if Count > 0
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then while True do
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begin
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Line := GetLine(OutputBuf);
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if Line = '' then Break;
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Line := StripLN(Line);
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if Line <> '' then FOutputLines.Add(Line);
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DoDbgOutput(Line);
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end;
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end;
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if ((WaitSet and 2) <> 0) and (FTargetProcess <> nil)
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then begin
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Count := ReadData(FTargetProcess.Output, FTargetOutputBuf);
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if Count > 0
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then while True do
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begin
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Line := StripLN(GetLine(FTargetOutputBuf));
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if Line = '' then Break;
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DoOutput(Line);
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end;
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end;
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until OutputBuf = WaitPrompt;
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WriteLN('[GetOutput] Leave');
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end;
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procedure TCmdLineDebugger.KillTargetProcess;
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begin
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FTargetProcess.Terminate(0);
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FTargetProcess.WaitOnExit;
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FTargetProcess.Free;
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FTargetProcess:= nil;
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end;
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procedure TCmdLineDebugger.SendCmdLn(const ACommand: String; const AGetOutput: Boolean); overload;
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const
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LF = #10;
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begin
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if FDbgProcess <> nil
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then begin
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WriteLN(Format('[TCmdLineDebugger.SendCmd] CMD: <%s>', [ACommand]));
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FDbgProcess.Input.Write(ACommand[1], Length(ACommand));
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FDbgProcess.Input.Write(LF, 1);
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if AGetOutput
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then GetOutput;
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end;
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end;
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procedure TCmdLineDebugger.SendCmdLn(const ACommand: String; Values: array of const; const AGetOutput: Boolean);
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begin
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SendCmdLn(Format(ACommand, Values), AGetOutput);
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end;
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procedure TCmdLineDebugger.TestCmd(const ACommand: String);
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begin
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SendCmdLn(ACommand, True);
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end;
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end.
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{ =============================================================================
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$Log$
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Revision 1.1 2001/11/05 00:12:51 lazarus
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MWE: First steps of a debugger.
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}
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