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tests/test/dumpmethods.pp
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124
tests/test/dumpmethods.pp
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program DumpMethods;
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{$mode objfpc}{$H+}
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uses
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Classes, SysUtils;
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const
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VMT_COUNT = 100;
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type
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TMethodNameTableEntry = packed record
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Name: PShortstring;
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Addr: Pointer;
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end;
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TMethodNameTable = packed record
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Count: DWord;
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Entries: packed array[0..9999999] of TMethodNameTableEntry;
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end;
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PMethodNameTable = ^TMethodNameTable;
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TPointerArray = packed array[0..9999999] of Pointer;
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PPointerArray = ^TPointerArray;
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{$M+}
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TMyTest = class(TObject)
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// published
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procedure P1; virtual;
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procedure P2; virtual;
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end;
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{$M-}
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TMyTest2 = class(TMyTest)
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// published
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procedure P2; override;
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procedure P3; virtual;
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end;
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TMyPersistent = class(TPersistent)
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// published
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procedure P1; virtual;
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procedure P2; virtual;
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end;
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procedure TMyTest.P1;
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begin
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end;
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procedure TMyTest.P2;
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begin
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end;
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procedure TMyTest2.P2;
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begin
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end;
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procedure TMyTest2.P3;
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begin
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end;
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procedure TMyPersistent.P1;
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begin
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end;
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procedure TMyPersistent.P2;
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begin
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end;
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procedure DumpClass(AClass: TClass);
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var
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Cvmt: PPointerArray;
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Cmnt: PMethodNameTable;
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Indent: String;
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n, idx: Integer;
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SearchAddr: Pointer;
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begin
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WriteLn('---------------------------------------------');
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WriteLn('Dump of ', AClass.ClassName);
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WriteLn('---------------------------------------------');
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Indent := '';
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while AClass <> nil do
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begin
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WriteLn(Indent, 'Processing ', AClass.Classname);
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Indent := Indent + ' ';
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Cmnt := PPointer(Pointer(AClass) + vmtMethodTable)^;
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if Cmnt <> nil
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then begin
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WriteLn(Indent, 'Method count: ', IntToStr(Cmnt^.Count));
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Cvmt := Pointer(AClass) + vmtMethodStart;
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for n := 0 to Cmnt^.Count - 1 do
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begin
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WriteLn(Indent, 'Search: ', Cmnt^.Entries[n].Name^);
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SearchAddr := Cmnt^.Entries[n].Addr;
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for idx := 0 to VMT_COUNT - 1 do
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begin
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if Cvmt^[idx] = SearchAddr
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then begin
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WriteLn(Indent, 'Found at index: ', IntToStr(idx));
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Break;
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end;
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if idx = VMT_COUNT - 1
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then begin
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WriteLn('[WARNING] VMT entry "', Cmnt^.Entries[n].Name^, '" not found in "', AClass.ClassName, '"');
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Break;
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end;
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end;
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end;
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end;
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AClass := AClass.ClassParent;
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end;
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end;
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begin
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DumpClass(TMyTest);
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DumpClass(TMyTest2);
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DumpClass(TPersistent);
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DumpClass(TMyPersistent);
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end.
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