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* RTTI fix for alignment-sensitive targets:

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* typinfo.pp: the newly introduced records were added into {$PACKRECORDS 1} area of effect, which  effectively made all records packed, entirely defeating FPC_REQUIRES_PROPER_ALIGNMENT purpose. 
  * added alignment between TProcedureParam records, adjusted TProcedureSignature.GetParam() appropriately.
   * ncgrtti.pas: added two missing alignments and removed a redundant one.
   * tests/test/trtti9.pp: modified to use TProcedureSignature.GetParam() and endian-independent check for parameter flags.

git-svn-id: trunk@24562 -
This commit is contained in:
sergei 2013-05-23 16:03:42 +00:00
parent 371deafcdc
commit 23cb216435
3 changed files with 17 additions and 12 deletions
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11
compiler/ncgrtti.pas
View File

@ -612,6 +612,8 @@ implementation
else
break;
end;
if (tf_requires_proper_alignment in target_info.flags) then
current_asmdata.asmlists[al_rtti].InsertAfter(cai_align.Create(sizeof(TConstPtrUInt)),lastai);
{ dimension count }
current_asmdata.asmlists[al_rtti].InsertAfter(Tai_const.Create_8bit(dimcount),lastai);
{ last dimension element type }
@ -738,6 +740,7 @@ implementation
begin
{ write flags for current parameter }
write_param_flag(parasym);
maybe_write_align;
{ write param type }
write_rtti_reference(parasym.vardef,fullrtti);
{ write name of current parameter }
@ -814,7 +817,7 @@ implementation
{ flags }
current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(0));
maybe_write_align;
//maybe_write_align; // aligning between bytes is not necessary
{ write calling convention }
current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(ProcCallOptionToCallConv[def.proccalloption]));
maybe_write_align;
@ -822,9 +825,11 @@ implementation
write_rtti_reference(def.returndef,fullrtti);
{ write parameter count }
current_asmdata.asmlists[al_rtti].concat(Tai_const.Create_8bit(def.maxparacount));
maybe_write_align;
for i:=0 to def.paras.count-1 do
write_procedure_param(tparavarsym(def.paras[i]));
begin
maybe_write_align;
write_procedure_param(tparavarsym(def.paras[i]));
end;
end;
end;

4
rtl/objpas/typinfo.pp
View File

@ -113,6 +113,7 @@ unit typinfo;
PTypeInfo = ^TTypeInfo;
PPTypeInfo = ^PTypeInfo;
{$PACKRECORDS C}
// members of TTypeData
TArrayTypeData =
{$ifndef FPC_REQUIRES_PROPER_ALIGNMENT}
@ -160,7 +161,6 @@ unit typinfo;
function GetParam(ParamIndex: Integer): PProcedureParam;
end;
{$PACKRECORDS C}
PTypeData = ^TTypeData;
TTypeData =
{$ifndef FPC_REQUIRES_PROPER_ALIGNMENT}
@ -2056,7 +2056,7 @@ begin
Result := PProcedureParam(PByte(@Flags) + SizeOf(Self));
while ParamIndex > 0 do
begin
Result := PProcedureParam(PByte(@Result^.Name) + (Length(Result^.Name) + 1) * SizeOf(AnsiChar));
Result := PProcedureParam(aligntoptr((PByte(@Result^.Name) + (Length(Result^.Name) + 1) * SizeOf(AnsiChar))));
dec(ParamIndex);
end;
end;

14
tests/test/trtti9.pp
View File

@ -9,9 +9,9 @@ type
PProcedureParam = ^TProcedureParam;
TProc = procedure(var A: Integer; S: String); stdcall;
function TestParam(Param: PProcedureParam; Flags: Byte; ParamType: Pointer; Name: ShortString): Boolean;
function TestParam(Param: PProcedureParam; Flags: TParamFlags; ParamType: Pointer; Name: ShortString): Boolean;
begin
Result := (Param^.Flags = Flags) and (Param^.ParamType = ParamType) and (Param^.Name = Name);
Result := (Param^.Flags = PByte(@Flags)^) and (Param^.ParamType = ParamType) and (Param^.Name = Name);
end;
var
@ -29,10 +29,10 @@ begin
halt(3);
if Data^.ProcSig.ParamCount <> 2 then
halt(4);
Param := PProcedureParam(PAnsiChar(@Data^.ProcSig.Flags) + SizeOf(TProcedureSignature));
if not TestParam(Param, 1, TypeInfo(Integer), 'A') then
Param := Data^.ProcSig.GetParam(0);
if not TestParam(Param, [pfVar], TypeInfo(Integer), 'A') then
halt(5);
Param := PProcedureParam(PAnsiChar(@Param^.Name) + (Length(Param^.Name) + 1) * SizeOf(AnsiChar));
if not TestParam(Param, 0, TypeInfo(String), 'S') then
Param := Data^.ProcSig.GetParam(1);
if not TestParam(Param, [], TypeInfo(String), 'S') then
halt(6);
end.
end.