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341 lines
9.5 KiB
ObjectPascal
341 lines
9.5 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl, Pierre Muller
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This unit handles the symbol tables
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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 symbase;
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{$i fpcdefs.inc}
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interface
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uses
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{ common }
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cutils,cclasses,
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{ global }
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globtype,globals,
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{ symtable }
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symconst
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;
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{************************************************
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Some internal constants
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************************************************}
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const
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hasharraysize = 256;
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indexgrowsize = 64;
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{$ifdef GDB}
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memsizeinc = 2048; { for long stabstrings }
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{$endif GDB}
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{************************************************
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Needed forward pointers
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************************************************}
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type
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tsymtable = class;
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{************************************************
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TSymtableEntry
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************************************************}
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tsymtableentry = class(TNamedIndexItem)
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owner : tsymtable;
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end;
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{************************************************
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TDefEntry
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************************************************}
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tdefentry = class(tsymtableentry)
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deftype : tdeftype;
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end;
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{************************************************
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TSymEntry
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************************************************}
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{ this object is the base for all symbol objects }
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tsymentry = class(tsymtableentry)
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typ : tsymtyp;
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end;
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{************************************************
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TSymtable
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************************************************}
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tsearchhasharray = array[0..hasharraysize-1] of tsymentry;
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psearchhasharray = ^tsearchhasharray;
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tsymtable = class
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public
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name : pstring;
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realname : pstring;
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symtabletype : tsymtabletype;
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{ each symtable gets a number }
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unitid : word{integer give range check errors PM};
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datasize : longint;
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dataalignment : longint;
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symindex,
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defindex : TIndexArray;
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symsearch : Tdictionary;
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next : tsymtable;
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defowner : tdefentry; { for records and objects }
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{ only used for parameter symtable to determine the offset relative }
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{ to the frame pointer and for local inline }
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address_fixup : longint;
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{ this saves all definition to allow a proper clean up }
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{ separate lexlevel from symtable type }
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symtablelevel : byte;
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constructor Create(const s:string);
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destructor destroy;override;
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procedure clear;virtual;
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function rename(const olds,news : stringid):tsymentry;
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procedure foreach(proc2call : tnamedindexcallback;arg:pointer);
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procedure foreach_static(proc2call : tnamedindexstaticcallback;arg:pointer);
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procedure insert(sym : tsymentry);virtual;
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function search(const s : stringid) : tsymentry;
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function speedsearch(const s : stringid;speedvalue : cardinal) : tsymentry;virtual;
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procedure registerdef(p : tdefentry);
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function getdefnr(l : longint) : tdefentry;
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function getsymnr(l : longint) : tsymentry;
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{$ifdef GDB}
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function getnewtypecount : word; virtual;
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{$endif GDB}
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end;
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{************************************************
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TDeref
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************************************************}
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tderef = class
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dereftype : tdereftype;
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index : word;
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next : tderef;
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constructor create(typ:tdereftype;i:word);
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destructor destroy;override;
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end;
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var
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registerdef : boolean; { true, when defs should be registered }
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defaultsymtablestack : tsymtable; { symtablestack after default units have been loaded }
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symtablestack : tsymtable; { linked list of symtables }
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aktrecordsymtable : tsymtable; { current record read from ppu symtable }
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aktstaticsymtable : tsymtable; { current static for local ppu symtable }
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aktlocalsymtable : tsymtable; { current proc local for local ppu symtable }
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implementation
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uses
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verbose;
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{****************************************************************************
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TSYMTABLE
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****************************************************************************}
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constructor tsymtable.Create(const s:string);
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begin
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if s<>'' then
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begin
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name:=stringdup(upper(s));
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realname:=stringdup(s);
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end
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else
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begin
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name:=nil;
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realname:=nil;
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end;
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symtabletype:=abstractsymtable;
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symtablelevel:=0;
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defowner:=nil;
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next:=nil;
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symindex:=tindexarray.create(indexgrowsize);
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defindex:=TIndexArray.create(indexgrowsize);
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symsearch:=tdictionary.create;
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symsearch.noclear:=true;
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unitid:=0;
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address_fixup:=0;
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datasize:=0;
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dataalignment:=1;
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end;
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destructor tsymtable.destroy;
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begin
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stringdispose(name);
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stringdispose(realname);
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symindex.destroy;
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defindex.destroy;
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{ symsearch can already be disposed or set to nil for withsymtable }
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if assigned(symsearch) then
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begin
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symsearch.destroy;
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symsearch:=nil;
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end;
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end;
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procedure tsymtable.registerdef(p : tdefentry);
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begin
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defindex.insert(p);
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{ set def owner and indexnb }
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p.owner:=self;
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end;
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procedure tsymtable.foreach(proc2call : tnamedindexcallback;arg:pointer);
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begin
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symindex.foreach(proc2call,arg);
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end;
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procedure tsymtable.foreach_static(proc2call : tnamedindexstaticcallback;arg:pointer);
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begin
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symindex.foreach_static(proc2call,arg);
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end;
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{***********************************************
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Table Access
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***********************************************}
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procedure tsymtable.clear;
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begin
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symindex.clear;
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defindex.clear;
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end;
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procedure tsymtable.insert(sym:tsymentry);
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begin
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sym.owner:=self;
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{ insert in index and search hash }
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symindex.insert(sym);
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symsearch.insert(sym);
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end;
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function tsymtable.search(const s : stringid) : tsymentry;
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begin
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search:=speedsearch(s,getspeedvalue(s));
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end;
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function tsymtable.speedsearch(const s : stringid;speedvalue : cardinal) : tsymentry;
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begin
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speedsearch:=tsymentry(symsearch.speedsearch(s,speedvalue));
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end;
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function tsymtable.rename(const olds,news : stringid):tsymentry;
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begin
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rename:=tsymentry(symsearch.rename(olds,news));
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end;
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function tsymtable.getsymnr(l : longint) : tsymentry;
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var
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hp : tsymentry;
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begin
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hp:=tsymentry(symindex.search(l));
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if hp=nil then
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internalerror(10999);
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getsymnr:=hp;
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end;
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function tsymtable.getdefnr(l : longint) : tdefentry;
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var
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hp : tdefentry;
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begin
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hp:=tdefentry(defindex.search(l));
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if hp=nil then
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internalerror(10998);
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getdefnr:=hp;
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end;
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{$ifdef GDB}
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function tsymtable.getnewtypecount : word;
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begin
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getnewtypecount:=0;
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end;
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{$endif GDB}
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{****************************************************************************
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TDeref
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****************************************************************************}
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constructor tderef.create(typ:tdereftype;i:word);
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begin
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dereftype:=typ;
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index:=i;
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next:=nil;
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end;
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destructor tderef.destroy;
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begin
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end;
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end.
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{
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$Log$
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Revision 1.6 2002-05-18 13:34:18 peter
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* readded missing revisions
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Revision 1.5 2002/05/16 19:46:44 carl
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+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
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+ try to fix temp allocation (still in ifdef)
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+ generic constructor calls
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+ start of tassembler / tmodulebase class cleanup
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Revision 1.3 2002/05/12 16:53:10 peter
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* moved entry and exitcode to ncgutil and cgobj
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* foreach gets extra argument for passing local data to the
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iterator function
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* -CR checks also class typecasts at runtime by changing them
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into as
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* fixed compiler to cycle with the -CR option
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* fixed stabs with elf writer, finally the global variables can
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be watched
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* removed a lot of routines from cga unit and replaced them by
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calls to cgobj
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* u32bit-s32bit updates for and,or,xor nodes. When one element is
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u32bit then the other is typecasted also to u32bit without giving
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a rangecheck warning/error.
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* fixed pascal calling method with reversing also the high tree in
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the parast, detected by tcalcst3 test
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}
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