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787 lines
27 KiB
ObjectPascal
787 lines
27 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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Routines for the code generation of data structures
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like VMT,Messages
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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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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit hcgdata;
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interface
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uses
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symtable,aasm;
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{ generates the message tables for a class }
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function genstrmsgtab(_class : pobjectdef) : pasmlabel;
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function genintmsgtab(_class : pobjectdef) : pasmlabel;
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{ generates the method name table }
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function genpublishedmethodstable(_class : pobjectdef) : pasmlabel;
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{ generates a VMT for _class }
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procedure genvmt(list : paasmoutput;_class : pobjectdef);
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{$ifdef WITHDMT}
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{ generates a DMT for _class }
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function gendmt(_class : pobjectdef) : pasmlabel;
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{$endif WITHDMT}
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implementation
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uses
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strings,cobjects,
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globtype,globals,verbose,
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symconst,types,
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hcodegen;
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{*****************************************************************************
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Message
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*****************************************************************************}
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type
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pprocdeftree = ^tprocdeftree;
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tprocdeftree = record
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p : pprocdef;
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nl : pasmlabel;
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l,r : pprocdeftree;
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end;
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var
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root : pprocdeftree;
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count : longint;
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procedure insertstr(p : pprocdeftree;var at : pprocdeftree);
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var
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i : longint;
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begin
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if at=nil then
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begin
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at:=p;
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inc(count);
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end
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else
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begin
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i:=strcomp(p^.p^.messageinf.str,at^.p^.messageinf.str);
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if i<0 then
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insertstr(p,at^.l)
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else if i>0 then
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insertstr(p,at^.r)
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else
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Message1(parser_e_duplicate_message_label,strpas(p^.p^.messageinf.str));
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end;
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end;
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procedure disposeprocdeftree(p : pprocdeftree);
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begin
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if assigned(p^.l) then
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disposeprocdeftree(p^.l);
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if assigned(p^.r) then
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disposeprocdeftree(p^.r);
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dispose(p);
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end;
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procedure insertmsgstr(p : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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var
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hp : pprocdef;
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pt : pprocdeftree;
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begin
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if psym(p)^.typ=procsym then
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begin
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hp:=pprocsym(p)^.definition;
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while assigned(hp) do
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begin
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if (po_msgstr in hp^.procoptions) then
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begin
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new(pt);
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pt^.p:=hp;
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pt^.l:=nil;
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pt^.r:=nil;
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insertstr(pt,root);
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end;
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hp:=hp^.nextoverloaded;
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end;
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end;
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end;
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procedure insertint(p : pprocdeftree;var at : pprocdeftree);
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begin
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if at=nil then
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begin
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at:=p;
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inc(count);
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end
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else
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begin
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if p^.p^.messageinf.i<at^.p^.messageinf.i then
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insertint(p,at^.l)
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else if p^.p^.messageinf.i>at^.p^.messageinf.i then
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insertint(p,at^.r)
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else
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Message1(parser_e_duplicate_message_label,tostr(p^.p^.messageinf.i));
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end;
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end;
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procedure insertmsgint(p : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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var
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hp : pprocdef;
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pt : pprocdeftree;
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begin
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if psym(p)^.typ=procsym then
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begin
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hp:=pprocsym(p)^.definition;
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while assigned(hp) do
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begin
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if (po_msgint in hp^.procoptions) then
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begin
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new(pt);
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pt^.p:=hp;
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pt^.l:=nil;
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pt^.r:=nil;
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insertint(pt,root);
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end;
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hp:=hp^.nextoverloaded;
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end;
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end;
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end;
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procedure writenames(p : pprocdeftree);
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begin
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getdatalabel(p^.nl);
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if assigned(p^.l) then
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writenames(p^.l);
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datasegment^.concat(new(pai_label,init(p^.nl)));
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datasegment^.concat(new(pai_const,init_8bit(strlen(p^.p^.messageinf.str))));
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datasegment^.concat(new(pai_string,init_pchar(p^.p^.messageinf.str)));
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if assigned(p^.r) then
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writenames(p^.r);
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end;
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procedure writestrentry(p : pprocdeftree);
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begin
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if assigned(p^.l) then
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writestrentry(p^.l);
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{ write name label }
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datasegment^.concat(new(pai_const_symbol,init(p^.nl)));
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datasegment^.concat(new(pai_const_symbol,initname(p^.p^.mangledname)));
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if assigned(p^.r) then
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writestrentry(p^.r);
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end;
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function genstrmsgtab(_class : pobjectdef) : pasmlabel;
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var
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r : pasmlabel;
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begin
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root:=nil;
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count:=0;
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{ insert all message handlers into a tree, sorted by name }
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_class^.symtable^.foreach({$ifndef TP}@{$endif}insertmsgstr);
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{ write all names }
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if assigned(root) then
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writenames(root);
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{ now start writing of the message string table }
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getdatalabel(r);
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datasegment^.concat(new(pai_label,init(r)));
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genstrmsgtab:=r;
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datasegment^.concat(new(pai_const,init_32bit(count)));
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if assigned(root) then
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begin
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writestrentry(root);
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disposeprocdeftree(root);
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end;
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end;
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procedure writeintentry(p : pprocdeftree);
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begin
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if assigned(p^.l) then
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writeintentry(p^.l);
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{ write name label }
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datasegment^.concat(new(pai_const,init_32bit(p^.p^.messageinf.i)));
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datasegment^.concat(new(pai_const_symbol,initname(p^.p^.mangledname)));
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if assigned(p^.r) then
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writeintentry(p^.r);
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end;
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function genintmsgtab(_class : pobjectdef) : pasmlabel;
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var
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r : pasmlabel;
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begin
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root:=nil;
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count:=0;
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{ insert all message handlers into a tree, sorted by name }
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_class^.symtable^.foreach({$ifndef TP}@{$endif}insertmsgint);
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{ now start writing of the message string table }
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getdatalabel(r);
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datasegment^.concat(new(pai_label,init(r)));
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genintmsgtab:=r;
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datasegment^.concat(new(pai_const,init_32bit(count)));
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if assigned(root) then
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begin
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writeintentry(root);
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disposeprocdeftree(root);
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end;
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end;
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{$ifdef WITHDMT}
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procedure insertdmtentry(p : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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var
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hp : pprocdef;
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pt : pprocdeftree;
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begin
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if psym(p)^.typ=procsym then
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begin
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hp:=pprocsym(p)^.definition;
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while assigned(hp) do
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begin
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if (po_msgint in hp^.procoptions) then
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begin
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new(pt);
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pt^.p:=hp;
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pt^.l:=nil;
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pt^.r:=nil;
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insertint(pt,root);
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end;
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hp:=hp^.nextoverloaded;
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end;
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end;
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end;
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procedure writedmtindexentry(p : pprocdeftree);
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begin
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if assigned(p^.l) then
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writedmtindexentry(p^.l);
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datasegment^.concat(new(pai_const,init_32bit(p^.p^.messageinf.i)));
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if assigned(p^.r) then
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writedmtindexentry(p^.r);
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end;
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procedure writedmtaddressentry(p : pprocdeftree);
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begin
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if assigned(p^.l) then
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writedmtaddressentry(p^.l);
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datasegment^.concat(new(pai_const_symbol,initname(p^.p^.mangledname)));
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if assigned(p^.r) then
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writedmtaddressentry(p^.r);
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end;
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function gendmt(_class : pobjectdef) : pasmlabel;
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var
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r : pasmlabel;
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begin
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root:=nil;
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count:=0;
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gendmt:=nil;
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{ insert all message handlers into a tree, sorted by number }
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_class^.symtable^.foreach({$ifndef TP}@{$endif}insertdmtentry);
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if count>0 then
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begin
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getdatalabel(r);
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gendmt:=r;
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datasegment^.concat(new(pai_label,init(r)));
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{ entries for caching }
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datasegment^.concat(new(pai_const,init_32bit(0)));
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datasegment^.concat(new(pai_const,init_32bit(0)));
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datasegment^.concat(new(pai_const,init_32bit(count)));
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if assigned(root) then
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begin
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writedmtindexentry(root);
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writedmtaddressentry(root);
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disposeprocdeftree(root);
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end;
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end;
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end;
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{$endif WITHDMT}
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procedure do_count(p : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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begin
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if (psym(p)^.typ=procsym) and (sp_published in psym(p)^.symoptions) then
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inc(count);
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end;
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procedure genpubmethodtableentry(p : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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var
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hp : pprocdef;
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l : pasmlabel;
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begin
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if (psym(p)^.typ=procsym) and (sp_published in psym(p)^.symoptions) then
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begin
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hp:=pprocsym(p)^.definition;
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if assigned(hp^.nextoverloaded) then
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internalerror(1209992);
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getlabel(l);
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consts^.concat(new(pai_label,init(l)));
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consts^.concat(new(pai_const,init_8bit(length(p^.name))));
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consts^.concat(new(pai_string,init(p^.name)));
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datasegment^.concat(new(pai_const_symbol,init(l)));
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datasegment^.concat(new(pai_const_symbol,initname(hp^.mangledname)));
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end;
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end;
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function genpublishedmethodstable(_class : pobjectdef) : pasmlabel;
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var
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l : pasmlabel;
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begin
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count:=0;
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_class^.symtable^.foreach({$ifndef TP}@{$endif}do_count);
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if count>0 then
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begin
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getlabel(l);
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datasegment^.concat(new(pai_label,init(l)));
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datasegment^.concat(new(pai_const,init_32bit(count)));
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_class^.symtable^.foreach({$ifndef TP}@{$endif}genpubmethodtableentry);
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genpublishedmethodstable:=l;
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end
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else
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genpublishedmethodstable:=nil;
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end;
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{*****************************************************************************
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VMT
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*****************************************************************************}
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type
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pprocdefcoll = ^tprocdefcoll;
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tprocdefcoll = record
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next : pprocdefcoll;
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data : pprocdef;
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end;
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psymcoll = ^tsymcoll;
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tsymcoll = record
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next : psymcoll;
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name : pstring;
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data : pprocdefcoll;
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end;
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var
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wurzel : psymcoll;
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nextvirtnumber : longint;
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_c : pobjectdef;
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has_constructor,has_virtual_method : boolean;
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procedure eachsym(sym : pnamedindexobject);{$ifndef FPC}far;{$endif FPC}
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var
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procdefcoll : pprocdefcoll;
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hp : pprocdef;
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symcoll : psymcoll;
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_name : string;
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stored : boolean;
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{ creates a new entry in the procsym list }
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procedure newentry;
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begin
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{ if not, generate a new symbol item }
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new(symcoll);
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symcoll^.name:=stringdup(sym^.name);
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symcoll^.next:=wurzel;
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symcoll^.data:=nil;
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wurzel:=symcoll;
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hp:=pprocsym(sym)^.definition;
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{ inserts all definitions }
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while assigned(hp) do
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begin
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new(procdefcoll);
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procdefcoll^.data:=hp;
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procdefcoll^.next:=symcoll^.data;
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symcoll^.data:=procdefcoll;
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{ if it's a virtual method }
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if (po_virtualmethod in hp^.procoptions) then
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begin
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{ then it gets a number ... }
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hp^.extnumber:=nextvirtnumber;
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{ and we inc the number }
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inc(nextvirtnumber);
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has_virtual_method:=true;
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end;
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if (hp^.proctypeoption=potype_constructor) then
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has_constructor:=true;
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{ check, if a method should be overridden }
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if (po_overridingmethod in hp^.procoptions) then
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MessagePos1(hp^.fileinfo,parser_e_nothing_to_be_overridden,_c^.objname^+'.'+_name+hp^.demangled_paras);
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{ next overloaded method }
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hp:=hp^.nextoverloaded;
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end;
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end;
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procedure newdefentry;
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begin
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new(procdefcoll);
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procdefcoll^.data:=hp;
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procdefcoll^.next:=symcoll^.data;
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symcoll^.data:=procdefcoll;
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{ if it's a virtual method }
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if (po_virtualmethod in hp^.procoptions) then
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begin
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{ then it gets a number ... }
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hp^.extnumber:=nextvirtnumber;
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{ and we inc the number }
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inc(nextvirtnumber);
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has_virtual_method:=true;
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end;
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|
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if (hp^.proctypeoption=potype_constructor) then
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has_constructor:=true;
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{ check, if a method should be overridden }
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if (po_overridingmethod in hp^.procoptions) then
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MessagePos1(hp^.fileinfo,parser_e_nothing_to_be_overridden,_c^.objname^+'.'+_name+hp^.demangled_paras);
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end;
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label
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handlenextdef;
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|
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begin
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{ put only sub routines into the VMT }
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if psym(sym)^.typ=procsym then
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begin
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_name:=sym^.name;
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symcoll:=wurzel;
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while assigned(symcoll) do
|
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begin
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{ does the symbol already exist in the list ? }
|
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if _name=symcoll^.name^ then
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begin
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{ walk through all defs of the symbol }
|
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hp:=pprocsym(sym)^.definition;
|
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while assigned(hp) do
|
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begin
|
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{ compare with all stored definitions }
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procdefcoll:=symcoll^.data;
|
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stored:=false;
|
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while assigned(procdefcoll) do
|
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begin
|
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{ compare parameters }
|
|
if equal_paras(procdefcoll^.data^.para,hp^.para,false) and
|
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(
|
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(po_virtualmethod in procdefcoll^.data^.procoptions) or
|
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(po_virtualmethod in hp^.procoptions)
|
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) then
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begin { same parameters }
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{ wenn sie gleich sind }
|
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{ und eine davon virtual deklariert ist }
|
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{ Fehler falls nur eine VIRTUAL }
|
|
if (po_virtualmethod in procdefcoll^.data^.procoptions)<>
|
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(po_virtualmethod in hp^.procoptions) then
|
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begin
|
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{ in classes, we hide the old method }
|
|
if _c^.is_class then
|
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begin
|
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{ warn only if it is the first time,
|
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we hide the method }
|
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if _c=hp^._class then
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Message1(parser_w_should_use_override,_c^.objname^+'.'+_name);
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end
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else
|
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if _c=hp^._class then
|
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begin
|
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if (po_virtualmethod in procdefcoll^.data^.procoptions) then
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Message1(parser_w_overloaded_are_not_both_virtual,_c^.objname^+'.'+_name)
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else
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Message1(parser_w_overloaded_are_not_both_non_virtual,
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_c^.objname^+'.'+_name);
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end;
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{ was newentry; exit; (FK) }
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newdefentry;
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goto handlenextdef;
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end
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else
|
|
{ the flags have to match }
|
|
{ except abstract and override }
|
|
{ only if both are virtual !! }
|
|
if (procdefcoll^.data^.proccalloptions<>hp^.proccalloptions) or
|
|
(procdefcoll^.data^.proctypeoption<>hp^.proctypeoption) or
|
|
((procdefcoll^.data^.procoptions-
|
|
[po_abstractmethod,po_overridingmethod,po_assembler])<>
|
|
(hp^.procoptions-[po_abstractmethod,po_overridingmethod,po_assembler])) then
|
|
Message1(parser_e_header_dont_match_forward,_c^.objname^+'.'+_name);
|
|
|
|
{ check, if the overridden directive is set }
|
|
{ (povirtualmethod is set! }
|
|
|
|
{ class ? }
|
|
if _c^.is_class and
|
|
not(po_overridingmethod in hp^.procoptions) then
|
|
begin
|
|
{ warn only if it is the first time,
|
|
we hide the method }
|
|
if _c=hp^._class then
|
|
Message1(parser_w_should_use_override,_c^.objname^+'.'+_name);
|
|
{ was newentry; (FK) }
|
|
newdefentry;
|
|
exit;
|
|
end;
|
|
|
|
{ error, if the return types aren't equal }
|
|
if not(is_equal(procdefcoll^.data^.rettype.def,hp^.rettype.def)) and
|
|
not((procdefcoll^.data^.rettype.def^.deftype=objectdef) and
|
|
(hp^.rettype.def^.deftype=objectdef) and
|
|
(pobjectdef(procdefcoll^.data^.rettype.def)^.is_class) and
|
|
(pobjectdef(hp^.rettype.def)^.is_class) and
|
|
(pobjectdef(hp^.rettype.def)^.is_related(
|
|
pobjectdef(procdefcoll^.data^.rettype.def)))) then
|
|
Message1(parser_e_overloaded_methodes_not_same_ret,_c^.objname^+'.'+_name);
|
|
|
|
|
|
{ now set the number }
|
|
hp^.extnumber:=procdefcoll^.data^.extnumber;
|
|
{ and exchange }
|
|
procdefcoll^.data:=hp;
|
|
stored:=true;
|
|
goto handlenextdef;
|
|
end; { same parameters }
|
|
procdefcoll:=procdefcoll^.next;
|
|
end;
|
|
{ if it isn't saved in the list }
|
|
{ we create a new entry }
|
|
if not(stored) then
|
|
begin
|
|
new(procdefcoll);
|
|
procdefcoll^.data:=hp;
|
|
procdefcoll^.next:=symcoll^.data;
|
|
symcoll^.data:=procdefcoll;
|
|
{ if the method is virtual ... }
|
|
if (po_virtualmethod in hp^.procoptions) then
|
|
begin
|
|
{ ... it will get a number }
|
|
hp^.extnumber:=nextvirtnumber;
|
|
inc(nextvirtnumber);
|
|
end;
|
|
{ check, if a method should be overridden }
|
|
if (po_overridingmethod in hp^.procoptions) then
|
|
MessagePos1(hp^.fileinfo,parser_e_nothing_to_be_overridden,
|
|
_c^.objname^+'.'+_name+hp^.demangled_paras);
|
|
end;
|
|
handlenextdef:
|
|
hp:=hp^.nextoverloaded;
|
|
end;
|
|
exit;
|
|
end;
|
|
symcoll:=symcoll^.next;
|
|
end;
|
|
newentry;
|
|
end;
|
|
end;
|
|
|
|
procedure genvmt(list : paasmoutput;_class : pobjectdef);
|
|
|
|
procedure do_genvmt(p : pobjectdef);
|
|
|
|
begin
|
|
{ start with the base class }
|
|
if assigned(p^.childof) then
|
|
do_genvmt(p^.childof);
|
|
|
|
{ walk through all public syms }
|
|
{ I had to change that to solve bug0260 (PM)}
|
|
{ _c:=p; }
|
|
_c:=_class;
|
|
{ Florian, please check if you agree (PM) }
|
|
{ no it wasn't correct, but I fixed it at }
|
|
{ another place: your fix hides only a bug }
|
|
{ _c is only used to give correct warnings }
|
|
p^.symtable^.foreach({$ifndef TP}@{$endif}eachsym);
|
|
end;
|
|
|
|
var
|
|
symcoll : psymcoll;
|
|
procdefcoll : pprocdefcoll;
|
|
i : longint;
|
|
|
|
begin
|
|
wurzel:=nil;
|
|
nextvirtnumber:=0;
|
|
|
|
has_constructor:=false;
|
|
has_virtual_method:=false;
|
|
|
|
{ generates a tree of all used methods }
|
|
do_genvmt(_class);
|
|
|
|
if has_virtual_method and not(has_constructor) then
|
|
Message1(parser_w_virtual_without_constructor,_class^.objname^);
|
|
|
|
|
|
{ generates the VMT }
|
|
|
|
{ walk trough all numbers for virtual methods and search }
|
|
{ the method }
|
|
for i:=0 to nextvirtnumber-1 do
|
|
begin
|
|
symcoll:=wurzel;
|
|
|
|
{ walk trough all symbols }
|
|
while assigned(symcoll) do
|
|
begin
|
|
|
|
{ walk trough all methods }
|
|
procdefcoll:=symcoll^.data;
|
|
while assigned(procdefcoll) do
|
|
begin
|
|
{ writes the addresses to the VMT }
|
|
{ but only this which are declared as virtual }
|
|
if procdefcoll^.data^.extnumber=i then
|
|
begin
|
|
if (po_virtualmethod in procdefcoll^.data^.procoptions) then
|
|
begin
|
|
{ if a method is abstract, then is also the }
|
|
{ class abstract and it's not allow to }
|
|
{ generates an instance }
|
|
if (po_abstractmethod in procdefcoll^.data^.procoptions) then
|
|
begin
|
|
include(_class^.objectoptions,oo_has_abstract);
|
|
list^.concat(new(pai_const_symbol,initname('FPC_ABSTRACTERROR')));
|
|
end
|
|
else
|
|
begin
|
|
list^.concat(new(pai_const_symbol,
|
|
initname(procdefcoll^.data^.mangledname)));
|
|
end;
|
|
end;
|
|
end;
|
|
procdefcoll:=procdefcoll^.next;
|
|
end;
|
|
symcoll:=symcoll^.next;
|
|
end;
|
|
end;
|
|
{ disposes the above generated tree }
|
|
symcoll:=wurzel;
|
|
while assigned(symcoll) do
|
|
begin
|
|
wurzel:=symcoll^.next;
|
|
stringdispose(symcoll^.name);
|
|
procdefcoll:=symcoll^.data;
|
|
while assigned(procdefcoll) do
|
|
begin
|
|
symcoll^.data:=procdefcoll^.next;
|
|
dispose(procdefcoll);
|
|
procdefcoll:=symcoll^.data;
|
|
end;
|
|
dispose(symcoll);
|
|
symcoll:=wurzel;
|
|
end;
|
|
end;
|
|
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.28 2000-05-11 06:55:28 florian
|
|
* fixed some vmt problems, especially related to overloaded methods
|
|
in objects/classes
|
|
|
|
Revision 1.27 2000/04/29 12:49:30 peter
|
|
* fixed long line for tp7
|
|
|
|
Revision 1.26 2000/03/06 15:57:42 peter
|
|
* better error pos for overridden error
|
|
|
|
Revision 1.25 2000/02/09 13:22:53 peter
|
|
* log truncated
|
|
|
|
Revision 1.24 2000/01/28 23:17:53 florian
|
|
* virtual XXXX; support for objects, only if -dWITHDMT is defined
|
|
|
|
Revision 1.23 2000/01/07 01:14:27 peter
|
|
* updated copyright to 2000
|
|
|
|
Revision 1.22 1999/12/02 19:22:16 peter
|
|
* write also parameters for override info
|
|
|
|
Revision 1.21 1999/12/01 12:42:32 peter
|
|
* fixed bug 698
|
|
* removed some notes about unused vars
|
|
|
|
Revision 1.20 1999/11/30 10:40:43 peter
|
|
+ ttype, tsymlist
|
|
|
|
Revision 1.19 1999/11/29 23:42:49 pierre
|
|
* fix for form bug 555
|
|
|
|
Revision 1.18 1999/10/26 12:30:41 peter
|
|
* const parameter is now checked
|
|
* better and generic check if a node can be used for assigning
|
|
* export fixes
|
|
* procvar equal works now (it never had worked at least from 0.99.8)
|
|
* defcoll changed to linkedlist with pparaitem so it can easily be
|
|
walked both directions
|
|
|
|
Revision 1.17 1999/09/13 16:23:42 peter
|
|
* remvoed unused var
|
|
|
|
Revision 1.16 1999/09/12 14:50:50 florian
|
|
+ implemented creation of methodname/address tables
|
|
|
|
Revision 1.15 1999/09/01 13:44:56 florian
|
|
* fixed writing of class rtti: vmt offset were written wrong
|
|
|
|
Revision 1.14 1999/08/03 22:02:52 peter
|
|
* moved bitmask constants to sets
|
|
* some other type/const renamings
|
|
|
|
} |