mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-07-16 08:16:08 +02:00
501 lines
13 KiB
ObjectPascal
501 lines
13 KiB
ObjectPascal
unit FpGdbmiDebugger;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, sysutils, FpDbgClasses, GDBMIDebugger, BaseDebugManager, Debugger, GDBMIMiscClasses,
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GDBTypeInfo, maps, FpDbgLoader, FpDbgDwarf, FpDbgDwarfConst, LazLoggerBase,
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LazLoggerProfiling;
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type
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TFpGDBMIDebugger = class;
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{ TFpGDBPTypeRequestCache }
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TFpGDBPTypeRequestCache = class(TGDBPTypeRequestCache)
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private
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FDebugger: TFpGDBMIDebugger;
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FInIndexOf: Boolean;
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public
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constructor Create(ADebugger: TFpGDBMIDebugger);
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function IndexOf(AThreadId, AStackFrame: Integer; ARequest: TGDBPTypeRequest): Integer; override;
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property Debugger: TFpGDBMIDebugger read FDebugger;
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end;
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{ TFpGDBMIDebugger }
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TFpGDBMIDebugger = class(TGDBMIDebugger)
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private
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FImageLoader: TDbgImageLoader;
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FDwarfInfo: TDbgDwarf;
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protected
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function CreateCommandStartDebugging(AContinueCommand: TGDBMIDebuggerCommand): TGDBMIDebuggerCommandStartDebugging; override;
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function CreateLineInfo: TDBGLineInfo; override;
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function CreateWatches: TWatchesSupplier; override;
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procedure DoState(const OldState: TDBGState); override;
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function HasDwarf: Boolean;
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procedure LoadDwarf;
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procedure UnLoadDwarf;
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function RequestCommand(const ACommand: TDBGCommand; const AParams: array of const): Boolean; override;
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procedure GetCurrentContext(out AThreadId, AStackFrame: Integer);
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function GetLocationForContext(AThreadId, AStackFrame: Integer): TDBGPtr;
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procedure AddToGDBMICache(AThreadId, AStackFrame: Integer; AnIdent: TDbgSymbol);
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function CreateTypeRequestCache: TGDBPTypeRequestCache; override;
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public
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class function Caption: String; override;
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public
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destructor Destroy; override;
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end;
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implementation
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type
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{ TFpGDBMIDebuggerCommandStartDebugging }
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TFpGDBMIDebuggerCommandStartDebugging = class(TGDBMIDebuggerCommandStartDebugging)
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protected
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function DoExecute: Boolean; override;
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end;
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{ TFPGDBMIWatches }
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TFPGDBMIWatches = class(TGDBMIWatches)
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private
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protected
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function FpDebugger: TFpGDBMIDebugger;
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//procedure DoStateChange(const AOldState: TDBGState); override;
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procedure InternalRequestData(AWatchValue: TCurrentWatchValue); override;
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public
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//constructor Create(const ADebugger: TDebugger);
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//destructor Destroy; override;
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end;
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{ TFpGDBMILineInfo }
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TFpGDBMILineInfo = class(TDBGLineInfo) //class(TGDBMILineInfo)
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private
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FRequestedSources: TStringList;
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protected
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function FpDebugger: TFpGDBMIDebugger;
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procedure DoStateChange(const AOldState: TDBGState); override;
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procedure ClearSources;
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public
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constructor Create(const ADebugger: TDebugger);
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destructor Destroy; override;
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function Count: Integer; override;
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function GetAddress(const AIndex: Integer; const ALine: Integer): TDbgPtr; override;
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function GetInfo(AAdress: TDbgPtr; out ASource, ALine, AOffset: Integer): Boolean; override;
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function IndexOf(const ASource: String): integer; override;
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procedure Request(const ASource: String); override;
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procedure Cancel(const ASource: String); override;
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end;
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{ TFpGDBPTypeRequestCache }
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constructor TFpGDBPTypeRequestCache.Create(ADebugger: TFpGDBMIDebugger);
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begin
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FDebugger := ADebugger;
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FInIndexOf := False;
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inherited Create;
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end;
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function TFpGDBPTypeRequestCache.IndexOf(AThreadId, AStackFrame: Integer;
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ARequest: TGDBPTypeRequest): Integer;
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var
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IdentName: String;
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Loc: TDBGPtr;
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Ident: TDbgSymbol;
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begin
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Result := inherited IndexOf(AThreadId, AStackFrame, ARequest);
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if (Result > 0) or FInIndexOf then
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exit;
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FInIndexOf := True;
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try
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if FDebugger.HasDwarf and (ARequest.ReqType = gcrtPType) then begin
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if copy(ARequest.Request, 1, 6) = 'ptype ' then
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IdentName := trim(copy(ARequest.Request, 7, length(ARequest.Request)))
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else
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if copy(ARequest.Request, 1, 7) = 'whatis ' then
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IdentName := trim(copy(ARequest.Request, 8, length(ARequest.Request)));
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if IdentName <> '' then begin
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Loc := FDebugger.GetLocationForContext(AThreadId, AStackFrame);
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if (Loc <> 0) then begin
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Ident := FDebugger.FDwarfInfo.FindIdentifier(Loc, IdentName);
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if Ident <> nil then begin
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FDebugger.AddToGDBMICache(AThreadId, AStackFrame, Ident);
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Result := inherited IndexOf(AThreadId, AStackFrame, ARequest);
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end;
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ReleaseRefAndNil(Ident);
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end;
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end;
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end;
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finally
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FInIndexOf := False;
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end;
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end;
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{ TFPGDBMIWatches }
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function TFPGDBMIWatches.FpDebugger: TFpGDBMIDebugger;
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begin
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Result := TFpGDBMIDebugger(Debugger);
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end;
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procedure TFPGDBMIWatches.InternalRequestData(AWatchValue: TCurrentWatchValue);
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var
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Loc: TDBGPtr;
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Ident: TDbgSymbol;
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begin
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//if FpDebugger.HasDwarf then begin
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// Loc := FpDebugger.GetLocationForContext(AWatchValue.ThreadId, AWatchValue.StackFrame);
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//
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// if (Loc <> 0) then begin
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// Ident := FpDebugger.FDwarfInfo.FindIdentifier(Loc, AWatchValue.Watch.Expression);
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//
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// if Ident <> nil then
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// FpDebugger.AddToGDBMICache(AWatchValue.ThreadId, AWatchValue.StackFrame, Ident);
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//
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// ReleaseRefAndNil(Ident);
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// end;
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//end;
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inherited InternalRequestData(AWatchValue);
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end;
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{ TFpGDBMILineInfo }
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function TFpGDBMILineInfo.FpDebugger: TFpGDBMIDebugger;
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begin
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Result := TFpGDBMIDebugger(Debugger);
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end;
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procedure TFpGDBMILineInfo.DoStateChange(const AOldState: TDBGState);
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begin
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//inherited DoStateChange(AOldState);
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if not (Debugger.State in [dsPause, dsInternalPause, dsRun]) then
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ClearSources;
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end;
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procedure TFpGDBMILineInfo.ClearSources;
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begin
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FRequestedSources.Clear;
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end;
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constructor TFpGDBMILineInfo.Create(const ADebugger: TDebugger);
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begin
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FRequestedSources := TStringList.Create;
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inherited Create(ADebugger);
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end;
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destructor TFpGDBMILineInfo.Destroy;
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begin
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FreeAndNil(FRequestedSources);
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inherited Destroy;
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end;
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function TFpGDBMILineInfo.Count: Integer;
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begin
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Result := FRequestedSources.Count;
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end;
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function TFpGDBMILineInfo.GetAddress(const AIndex: Integer; const ALine: Integer): TDbgPtr;
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var
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Map: PDWarfLineMap;
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begin
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Result := 0;
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if not FpDebugger.HasDwarf then
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exit;
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//Result := FpDebugger.FDwarfInfo.GetLineAddress(FRequestedSources[AIndex], ALine);
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Map := PDWarfLineMap(FRequestedSources.Objects[AIndex]);
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if Map <> nil then
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Result := Map^.GetAddressForLine(ALine);
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end;
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function TFpGDBMILineInfo.GetInfo(AAdress: TDbgPtr; out ASource, ALine,
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AOffset: Integer): Boolean;
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begin
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Result := False;
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//ASource := '';
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//ALine := 0;
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//if not FpDebugger.HasDwarf then
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// exit(nil);
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//FpDebugger.FDwarfInfo.
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end;
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function TFpGDBMILineInfo.IndexOf(const ASource: String): integer;
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begin
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Result := FRequestedSources.IndexOf(ASource);
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end;
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procedure TFpGDBMILineInfo.Request(const ASource: String);
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begin
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if not FpDebugger.HasDwarf then
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exit;
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FRequestedSources.AddObject(ASource, TObject(FpDebugger.FDwarfInfo.GetLineAddressMap(ASource)));
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DoChange(ASource);
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end;
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procedure TFpGDBMILineInfo.Cancel(const ASource: String);
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begin
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//
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end;
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{ TFpGDBMIDebuggerCommandStartDebugging }
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function TFpGDBMIDebuggerCommandStartDebugging.DoExecute: Boolean;
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begin
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TFpGDBMIDebugger(FTheDebugger).LoadDwarf;
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Result := inherited DoExecute;
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end;
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{ TFpGDBMIDebugger }
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procedure TFpGDBMIDebugger.DoState(const OldState: TDBGState);
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begin
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inherited DoState(OldState);
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if State in [dsStop, dsError, dsNone] then
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UnLoadDwarf;
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end;
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function TFpGDBMIDebugger.HasDwarf: Boolean;
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begin
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Result := FDwarfInfo <> nil;
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end;
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procedure TFpGDBMIDebugger.LoadDwarf;
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begin
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UnLoadDwarf;
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debugln(['TFpGDBMIDebugger.LoadDwarf ']);
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FImageLoader := TDbgImageLoader.Create(FileName);
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FDwarfInfo := TDbgDwarf.Create(FImageLoader);
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FDwarfInfo.LoadCompilationUnits;
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end;
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procedure TFpGDBMIDebugger.UnLoadDwarf;
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begin
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debugln(['TFpGDBMIDebugger.UnLoadDwarf ']);
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FreeAndNil(FDwarfInfo);
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FreeAndNil(FImageLoader);
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end;
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function TFpGDBMIDebugger.RequestCommand(const ACommand: TDBGCommand;
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const AParams: array of const): Boolean;
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var
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Ident: TDbgSymbol;
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Loc: TDBGPtr;
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CurThread, CurStack: Integer;
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begin
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if HasDwarf and (ACommand = dcEvaluate) then begin
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//GetCurrentContext(CurThread, CurStack);
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//Loc := GetLocationForContext(CurThread, CurStack);
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//
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//if (Loc <> 0) then begin
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// Ident := FDwarfInfo.FindIdentifier(Loc, String(AParams[0].VAnsiString));
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//
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// if Ident <> nil then
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// AddToGDBMICache(CurThread, CurStack, Ident);
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//
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// ReleaseRefAndNil(Ident);
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//end;
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// //EvalFlags := [];
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// //if high(AParams) >= 3 then
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// // EvalFlags := TDBGEvaluateFlags(AParams[3].VInteger);
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// //Result := GDBEvaluate(String(AParams[0].VAnsiString),
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// // String(AParams[1].VPointer^), TGDBType(AParams[2].VPointer^),
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// // EvalFlags);
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Result := inherited RequestCommand(ACommand, AParams);
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end
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else
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Result := inherited RequestCommand(ACommand, AParams);
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end;
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procedure TFpGDBMIDebugger.GetCurrentContext(out AThreadId, AStackFrame: Integer);
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begin
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if (AThreadId <= 0) and CurrentThreadIdValid then begin
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AThreadId := CurrentThreadId;
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AStackFrame := 0;
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end
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else
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if (AThreadId <= 0) and (not CurrentThreadIdValid) then begin
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AThreadId := 1;
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AStackFrame := 0;
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end
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else
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if (AStackFrame < 0) and (CurrentStackFrameValid) then begin
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AStackFrame := CurrentStackFrame;
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end
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else
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if (AStackFrame < 0) and (not CurrentStackFrameValid) then begin
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AStackFrame := 0;
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end;
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end;
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function TFpGDBMIDebugger.GetLocationForContext(AThreadId, AStackFrame: Integer): TDBGPtr;
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var
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t: TThreadEntry;
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s: TCallStack;
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f: TCallStackEntry;
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begin
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Result := 0;
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if (AThreadId <= 0) then begin
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GetCurrentContext(AThreadId, AStackFrame);
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end
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else
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if (AStackFrame < 0) then begin
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AStackFrame := 0;
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end;
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t := Threads.CurrentThreads.EntryById[AThreadId];
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if t = nil then begin
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DebugLn(['NO Threads']);
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exit;
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end;
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if AStackFrame = 0 then begin
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Result := t.Address;
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DebugLn(['Returning addr from Threads', dbgs(Result)]);
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exit;
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end;
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s := CallStack.CurrentCallStackList.EntriesForThreads[AThreadId];
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if s = nil then begin
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DebugLn(['NO Stackframe list for thread']);
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exit;
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end;
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f := s.Entries[AStackFrame];
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if f = nil then begin
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DebugLn(['NO Stackframe']);
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exit;
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end;
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Result := f.Address;
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DebugLn(['Returning addr from frame', dbgs(Result)]);
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end;
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type
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TGDBMIDwarfTypeIdentifier = class(TDbgDwarfTypeIdentifier)
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public
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property InformationEntry;
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end;
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procedure TFpGDBMIDebugger.AddToGDBMICache(AThreadId, AStackFrame: Integer;
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AnIdent: TDbgSymbol);
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const
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GdbCmdPType = 'ptype ';
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GdbCmdWhatIs = 'whatis ';
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procedure MaybeAdd(AType: TGDBCommandRequestType; AQuery, AAnswer: String);
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var
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AReq: TGDBPTypeRequest;
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begin
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AReq.ReqType := AType;
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AReq.Request := AQuery;
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if TypeRequestCache.IndexOf(AThreadId, AStackFrame, AReq) < 0 then begin
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AReq.Result := ParseTypeFromGdb(AAnswer);
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TypeRequestCache.Add(AThreadId, AStackFrame, AReq);
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debugln(['TFpGDBMIDebugger.AddToGDBMICache ', AReq.Request, ' T:', AThreadId, ' S:',AStackFrame, ' >> ', AAnswer]);
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end;
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end;
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var
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TypeIdent: TDbgDwarfTypeIdentifier;
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VarName, TypeName: String;
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AReq: TGDBPTypeRequest;
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IsPointer: Boolean;
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begin
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(* Simulate gdb answers *)
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//TypeRequestCache
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if AnIdent is TDbgDwarfValueIdentifier then begin
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VarName := TDbgDwarfValueIdentifier(AnIdent).IdentifierName;
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TypeIdent := TDbgDwarfValueIdentifier(AnIdent).TypeInfo;
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if TypeIdent = nil then exit;
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TypeName := TypeIdent.IdentifierName;
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IsPointer := TypeIdent.IsPointerType;
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while (TypeIdent <> nil) and TypeIdent.IsPointerType do
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TypeIdent := TypeIdent.PointedToType;
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if TypeIdent = nil then exit;
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if TGDBMIDwarfTypeIdentifier(TypeIdent).IsBaseType then begin
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if IsPointer then begin
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MaybeAdd(gcrtPType, GdbCmdPType + VarName, Format('type = ^%s', [TypeName]));
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MaybeAdd(gcrtPType, GdbCmdWhatIs + VarName, Format('type = ^%s', [TypeName]));
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MaybeAdd(gcrtPType, GdbCmdPType + GDBMIMaybeApplyBracketsToExpr(VarName) + '^',
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Format('type = %s', [TypeName]));
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MaybeAdd(gcrtPType, GdbCmdWhatIs + GDBMIMaybeApplyBracketsToExpr(VarName) + '^',
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Format('type = %s', [TypeName]));
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end
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else begin
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MaybeAdd(gcrtPType, GdbCmdPType + VarName, Format('type = %s', [TypeName]));
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MaybeAdd(gcrtPType, GdbCmdWhatIs + VarName, Format('type = %s', [TypeName]));
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end;
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end;
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end;
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(*
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ptype i
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~"type = LONGINT\n"
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whatis i
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~"type = LONGINT\n"
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ptype @i
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~"type = ^LONGINT\n"
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ptype (@i)^
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~"type = LONGINT\n"
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whatis @i
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~"type = ^LONGINT\n"
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*)
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end;
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function TFpGDBMIDebugger.CreateTypeRequestCache: TGDBPTypeRequestCache;
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begin
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Result := TFpGDBPTypeRequestCache.Create(Self);
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end;
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function TFpGDBMIDebugger.CreateCommandStartDebugging(AContinueCommand: TGDBMIDebuggerCommand): TGDBMIDebuggerCommandStartDebugging;
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begin
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Result := TFpGDBMIDebuggerCommandStartDebugging.Create(Self, AContinueCommand);
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end;
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function TFpGDBMIDebugger.CreateLineInfo: TDBGLineInfo;
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begin
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Result := TFpGDBMILineInfo.Create(Self);
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end;
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function TFpGDBMIDebugger.CreateWatches: TWatchesSupplier;
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begin
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Result := TFPGDBMIWatches.Create(Self);
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end;
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class function TFpGDBMIDebugger.Caption: String;
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begin
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Result := 'GNU remote debugger (with fpdebug)';
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end;
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destructor TFpGDBMIDebugger.Destroy;
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begin
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UnLoadDwarf;
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inherited Destroy;
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end;
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initialization
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RegisterDebugger(TFpGDBMIDebugger);
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end.
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