|
@@ -0,0 +1,171 @@
|
|
|
+program DumpClass;
|
|
|
+
|
|
|
+{$mode objfpc}{$H+}
|
|
|
+
|
|
|
+uses
|
|
|
+ Classes, SysUtils;
|
|
|
+
|
|
|
+const
|
|
|
+ VMT_COUNT = 100;
|
|
|
+
|
|
|
+
|
|
|
+type
|
|
|
+ TMethodNameTableEntry = packed record
|
|
|
+ Name: PShortstring;
|
|
|
+ Addr: Pointer;
|
|
|
+ end;
|
|
|
+
|
|
|
+ TMethodNameTable = packed record
|
|
|
+ Count: DWord;
|
|
|
+ Entries: packed array[0..9999999] of TMethodNameTableEntry;
|
|
|
+ end;
|
|
|
+ PMethodNameTable = ^TMethodNameTable;
|
|
|
+
|
|
|
+ TPointerArray = packed array[0..9999999] of Pointer;
|
|
|
+ PPointerArray = ^TPointerArray;
|
|
|
+
|
|
|
+ PFieldInfo = ^TFieldInfo;
|
|
|
+ TFieldInfo = packed record
|
|
|
+ FieldOffset: LongWord;
|
|
|
+ ClassTypeIndex: Word;
|
|
|
+ Name: ShortString;
|
|
|
+ end;
|
|
|
+
|
|
|
+ PFieldClassTable = ^TFieldClassTable;
|
|
|
+ TFieldClassTable = packed record
|
|
|
+ Count: Word;
|
|
|
+ Entries: array[Word] of TPersistentClass;
|
|
|
+ end;
|
|
|
+
|
|
|
+ PFieldTable = ^TFieldTable;
|
|
|
+ TFieldTable = packed record
|
|
|
+ FieldCount: Word;
|
|
|
+ ClassTable: PFieldClassTable;
|
|
|
+ { Fields: array[Word] of TFieldInfo; Elements have variant size! }
|
|
|
+ end;
|
|
|
+
|
|
|
+{$M+}
|
|
|
+ TMyTest = class(TObject)
|
|
|
+ published
|
|
|
+ F1: TMyTest;
|
|
|
+ F2: TMyTest;
|
|
|
+ procedure P1; virtual;
|
|
|
+ procedure P2; virtual;
|
|
|
+ end;
|
|
|
+{$M-}
|
|
|
+
|
|
|
+ TMyTest2 = class(TMyTest)
|
|
|
+ F3: TMyTest;
|
|
|
+ F4: TMyTest;
|
|
|
+ procedure P2; override;
|
|
|
+ procedure P3; virtual;
|
|
|
+ end;
|
|
|
+
|
|
|
+ TMyPersistent = class(TPersistent)
|
|
|
+ procedure P1; virtual;
|
|
|
+ procedure P2; virtual;
|
|
|
+ end;
|
|
|
+
|
|
|
+procedure TMyTest.P1;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure TMyTest.P2;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure TMyTest2.P2;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure TMyTest2.P3;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure TMyPersistent.P1;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure TMyPersistent.P2;
|
|
|
+begin
|
|
|
+end;
|
|
|
+
|
|
|
+procedure ClassDump(AClass: TClass);
|
|
|
+var
|
|
|
+ Cvmt: PPointerArray;
|
|
|
+ Cmnt: PMethodNameTable;
|
|
|
+ Cft: PFieldTable;
|
|
|
+ FieldOffset: LongWord;
|
|
|
+ fi: PFieldInfo;
|
|
|
+ Indent: String;
|
|
|
+ n, idx: Integer;
|
|
|
+ SearchAddr: Pointer;
|
|
|
+begin
|
|
|
+ WriteLn('---------------------------------------------');
|
|
|
+ WriteLn('Dump of ', AClass.ClassName);
|
|
|
+ WriteLn('---------------------------------------------');
|
|
|
+ Indent := '';
|
|
|
+ while AClass <> nil do
|
|
|
+ begin
|
|
|
+ WriteLn(Indent, 'Processing ', AClass.Classname);
|
|
|
+ Indent := Indent + ' ';
|
|
|
+
|
|
|
+ //---
|
|
|
+ Cmnt := PPointer(Pointer(AClass) + vmtMethodTable)^;
|
|
|
+ if Cmnt <> nil
|
|
|
+ then begin
|
|
|
+ WriteLn(Indent, 'Method count: ', IntToStr(Cmnt^.Count));
|
|
|
+
|
|
|
+ Cvmt := Pointer(AClass) + vmtMethodStart;
|
|
|
+
|
|
|
+ for n := 0 to Cmnt^.Count - 1 do
|
|
|
+ begin
|
|
|
+ Write(Indent, 'Search: ', Cmnt^.Entries[n].Name^);
|
|
|
+
|
|
|
+ SearchAddr := Cmnt^.Entries[n].Addr;
|
|
|
+ for idx := 0 to VMT_COUNT - 1 do
|
|
|
+ begin
|
|
|
+ if Cvmt^[idx] = SearchAddr
|
|
|
+ then begin
|
|
|
+ WriteLn(Indent, ' Found at index: ', IntToStr(idx));
|
|
|
+ Break;
|
|
|
+ end;
|
|
|
+ if idx = VMT_COUNT - 1
|
|
|
+ then begin
|
|
|
+ WriteLn('[WARNING] VMT entry "', Cmnt^.Entries[n].Name^, '" not found in "', AClass.ClassName, '"');
|
|
|
+ Break;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+
|
|
|
+ //---
|
|
|
+ Cft := PPointer(Pointer(AClass) + vmtFieldTable)^;
|
|
|
+ if Cft <> nil
|
|
|
+ then begin
|
|
|
+ WriteLn(Indent, 'Field count: ', Cft^.FieldCount);
|
|
|
+ fi := @Cft^.ClassTable + SizeOf(Cft^.ClassTable);
|
|
|
+ for n := 0 to Cft^.FieldCount - 1 do
|
|
|
+ begin
|
|
|
+ Move(fi^.FieldOffset, FieldOffset, SizeOf(FieldOffset));
|
|
|
+ WriteLn(Indent, ' ', n, ': ', fi^.Name, ' @', FieldOffset);
|
|
|
+ fi := @fi^.name + 1 + Ord(fi^.name[0]);
|
|
|
+ end;
|
|
|
+ WriteLn(Indent, 'Field class count: ', Cft^.ClassTable^.Count);
|
|
|
+ for n := 0 to Cft^.ClassTable^.Count - 1 do
|
|
|
+ begin
|
|
|
+ WriteLn(Indent, ' ', n, ': ', Cft^.ClassTable^.Entries[n].ClassName);
|
|
|
+ end;
|
|
|
+ end;
|
|
|
+
|
|
|
+ AClass := AClass.ClassParent;
|
|
|
+ end;
|
|
|
+end;
|
|
|
+
|
|
|
+begin
|
|
|
+ ClassDump(TMyTest);
|
|
|
+ ClassDump(TMyTest2);
|
|
|
+ ClassDump(TPersistent);
|
|
|
+ ClassDump(TMyPersistent);
|
|
|
+end.
|