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|
{
Copyright (c) 1998-2002 by Florian Klaempfl
Handles the parsing and loading of the modules (ppufiles)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit pmodules;
{$i fpcdefs.inc}
interface
procedure proc_unit;
procedure proc_program(islibrary : boolean);
implementation
uses
globtype,version,systems,tokens,
cutils,cclasses,comphook,
globals,verbose,fmodule,finput,fppu,
symconst,symbase,symtype,symdef,symsym,symtable,
aasmtai,aasmcpu,aasmbase,
cgbase,cgobj,
nbas,ncgutil,
link,assemble,import,export,gendef,ppu,comprsrc,
cresstr,procinfo,
dwarf,
{$ifdef GDB}
gdb,
{$endif GDB}
scanner,pbase,pexpr,psystem,psub,pdecsub;
procedure fixseg(p:TAAsmoutput; sec:TAsmSectionType; secname: string);
begin
maybe_new_object_file(p);
if target_info.system <> system_powerpc_macos then
p.insert(Tai_section.Create(sec,'',0))
else
p.insert(Tai_section.Create(sec,secname,0));
end;
procedure create_objectfile;
var
DLLScanner : TDLLScanner;
s : string;
KeepShared : TStringList;
begin
{ try to create import entries from system dlls }
if target_info.DllScanSupported and
(not current_module.linkOtherSharedLibs.Empty) then
begin
{ Init DLLScanner }
if assigned(CDLLScanner[target_info.system]) then
DLLScanner:=CDLLScanner[target_info.system].Create
else
internalerror(200104121);
KeepShared:=TStringList.Create;
{ Walk all shared libs }
While not current_module.linkOtherSharedLibs.Empty do
begin
S:=current_module.linkOtherSharedLibs.Getusemask(link_allways);
if not DLLScanner.scan(s) then
KeepShared.Concat(s);
end;
DLLscanner.Free;
{ Recreate import section }
if (target_info.system in [system_i386_win32,system_i386_wdosx]) then
begin
if assigned(importssection)then
importssection.clear
else
importssection:=taasmoutput.Create;
importlib.generatelib;
end;
{ Readd the not processed files }
while not KeepShared.Empty do
begin
s:=KeepShared.GetFirst;
current_module.linkOtherSharedLibs.add(s,link_allways);
end;
KeepShared.Free;
end;
{ create the .s file and assemble it }
GenerateAsm(false);
{ Also create a smartlinked version ? }
if (cs_create_smart in aktmoduleswitches) then
begin
{ regenerate the importssection for win32 }
if assigned(importssection) and
(target_info.system in [system_i386_win32,system_i386_wdosx]) then
begin
importsSection.clear;
importlib.generatesmartlib;
end;
GenerateAsm(true);
if (af_needar in target_asm.flags) then
Linker.MakeStaticLibrary;
end;
{ resource files }
CompileResourceFiles;
end;
procedure insertobjectfile;
{ Insert the used object file for this unit in the used list for this unit }
begin
current_module.linkunitofiles.add(current_module.objfilename^,link_static);
current_module.flags:=current_module.flags or uf_static_linked;
if (cs_create_smart in aktmoduleswitches) then
begin
current_module.linkunitstaticlibs.add(current_module.staticlibfilename^,link_smart);
current_module.flags:=current_module.flags or uf_smart_linked;
end;
end;
procedure create_dwarf;
begin
dwarflist:=taasmoutput.create;
{ Call frame information }
if (tf_needs_dwarf_cfi in target_info.flags) and
(af_supports_dwarf in target_asm.flags) then
dwarfcfi.generate_code(dwarflist);
end;
procedure insertsegment;
var
oldaktfilepos : tfileposinfo;
{Note: Sections get names in macos only.}
begin
{ Insert Ident of the compiler }
if (not (cs_create_smart in aktmoduleswitches))
{$ifndef EXTDEBUG}
and (not current_module.is_unit)
{$endif}
then
begin
{ align the first data }
dataSegment.insert(Tai_align.Create(const_align(32)));
dataSegment.insert(Tai_string.Create('FPC '+full_version_string+
' ['+date_string+'] for '+target_cpu_string+' - '+target_info.shortname));
end;
{ align code segment }
codeSegment.concat(Tai_align.Create(aktalignment.procalign));
{ Insert start and end of sections }
fixseg(codesegment,sec_code,'____seg_code');
fixseg(datasegment,sec_data,'____seg_data');
fixseg(bsssegment,sec_bss,'____seg_bss');
{ we should use .rdata section for these two no ?
.rdata is a read only data section (PM) }
fixseg(rttilist,sec_data,'____seg_rtti');
fixseg(consts,sec_data,'____seg_consts');
fixseg(picdata,sec_data,'____seg_picdata');
if assigned(resourcestringlist) then
fixseg(resourcestringlist,sec_data,'____seg_resstrings');
{$ifdef GDB}
if assigned(debuglist) then
begin
oldaktfilepos:=aktfilepos;
aktfilepos.line:=0;
debugList.insert(Tai_symbol.Createname('gcc2_compiled',AT_DATA,0));
debugList.insert(Tai_symbol.Createname('fpc_compiled',AT_DATA,0));
fixseg(debuglist,sec_code,'____seg_debug');
aktfilepos:=oldaktfilepos;
end;
{$endif GDB}
end;
procedure InsertThreadvarTablesTable;
var
hp : tused_unit;
ltvTables : taasmoutput;
count : longint;
begin
ltvTables:=TAAsmOutput.Create;
count:=0;
hp:=tused_unit(usedunits.first);
while assigned(hp) do
begin
If (hp.u.flags and uf_threadvars)=uf_threadvars then
begin
ltvTables.concat(Tai_const.Createname(make_mangledname('THREADVARLIST',hp.u.globalsymtable,''),AT_DATA,0));
inc(count);
end;
hp:=tused_unit(hp.next);
end;
{ Add program threadvars, if any }
If (current_module.flags and uf_threadvars)=uf_threadvars then
begin
ltvTables.concat(Tai_const.Createname(make_mangledname('THREADVARLIST',current_module.localsymtable,''),AT_DATA,0));
inc(count);
end;
{ TableCount }
ltvTables.insert(Tai_const.Create_32bit(count));
ltvTables.insert(Tai_symbol.Createname_global('FPC_THREADVARTABLES',AT_DATA,0));
ltvTables.insert(Tai_align.Create(const_align(sizeof(aint))));
ltvTables.concat(Tai_symbol_end.Createname('FPC_THREADVARTABLES'));
{ insert in data segment }
maybe_new_object_file(dataSegment);
dataSegment.concatlist(ltvTables);
ltvTables.free;
end;
procedure AddToThreadvarList(p:tnamedindexitem;arg:pointer);
var
ltvTable : taasmoutput;
begin
ltvTable:=taasmoutput(arg);
if (tsym(p).typ=globalvarsym) and
(vo_is_thread_var in tglobalvarsym(p).varoptions) then
begin
{ address of threadvar }
ltvTable.concat(tai_const.Createname(tglobalvarsym(p).mangledname,AT_DATA,0));
{ size of threadvar }
ltvTable.concat(tai_const.create_32bit(tglobalvarsym(p).getsize));
end;
end;
procedure InsertThreadvars;
var
s : string;
ltvTable : TAAsmoutput;
begin
ltvTable:=TAAsmoutput.create;
if assigned(current_module.globalsymtable) then
current_module.globalsymtable.foreach_static(@AddToThreadvarList,ltvTable);
current_module.localsymtable.foreach_static(@AddToThreadvarList,ltvTable);
if ltvTable.first<>nil then
begin
s:=make_mangledname('THREADVARLIST',current_module.localsymtable,'');
{ add begin and end of the list }
ltvTable.insert(tai_symbol.Createname_global(s,AT_DATA,0));
ltvTable.insert(Tai_align.Create(const_align(32)));
ltvTable.concat(tai_const.create_sym(nil)); { end of list marker }
ltvTable.concat(tai_symbol_end.createname(s));
maybe_new_object_file(dataSegment);
dataSegment.concatlist(ltvTable);
current_module.flags:=current_module.flags or uf_threadvars;
end;
ltvTable.Free;
end;
Procedure InsertResourceTablesTable;
var
hp : tused_unit;
ResourceStringTables : taasmoutput;
count : longint;
begin
ResourceStringTables:=TAAsmOutput.Create;
count:=0;
hp:=tused_unit(usedunits.first);
while assigned(hp) do
begin
If (hp.u.flags and uf_has_resources)=uf_has_resources then
begin
ResourceStringTables.concat(Tai_const.Createname(make_mangledname('RESOURCESTRINGLIST',hp.u.globalsymtable,''),AT_DATA,0));
inc(count);
end;
hp:=tused_unit(hp.next);
end;
{ Add program resources, if any }
If ResourceStringList<>Nil then
begin
ResourceStringTables.concat(Tai_const.Createname(make_mangledname('RESOURCESTRINGLIST',current_module.localsymtable,''),AT_DATA,0));
Inc(Count);
end;
{ TableCount }
ResourceStringTables.insert(Tai_const.Create_32bit(count));
ResourceStringTables.insert(Tai_symbol.Createname_global('FPC_RESOURCESTRINGTABLES',AT_DATA,0));
ResourceStringTables.insert(Tai_align.Create(const_align(4)));
ResourceStringTables.concat(Tai_symbol_end.Createname('FPC_RESOURCESTRINGTABLES'));
{ insert in data segment }
maybe_new_object_file(dataSegment);
dataSegment.concatlist(ResourceStringTables);
ResourceStringTables.free;
end;
procedure InsertInitFinalTable;
var
hp : tused_unit;
unitinits : taasmoutput;
count : longint;
begin
unitinits:=TAAsmOutput.Create;
count:=0;
hp:=tused_unit(usedunits.first);
while assigned(hp) do
begin
{ call the unit init code and make it external }
if (hp.u.flags and (uf_init or uf_finalize))<>0 then
begin
if (hp.u.flags and uf_init)<>0 then
unitinits.concat(Tai_const.Createname(make_mangledname('INIT$',hp.u.globalsymtable,''),AT_FUNCTION,0))
else
unitinits.concat(Tai_const.Create_sym(nil));
if (hp.u.flags and uf_finalize)<>0 then
unitinits.concat(Tai_const.Createname(make_mangledname('FINALIZE$',hp.u.globalsymtable,''),AT_FUNCTION,0))
else
unitinits.concat(Tai_const.Create_sym(nil));
inc(count);
end;
hp:=tused_unit(hp.next);
end;
{ Insert initialization/finalization of the program }
if (current_module.flags and (uf_init or uf_finalize))<>0 then
begin
if (current_module.flags and uf_init)<>0 then
unitinits.concat(Tai_const.Createname(make_mangledname('INIT$',current_module.localsymtable,''),AT_FUNCTION,0))
else
unitinits.concat(Tai_const.Create_sym(nil));
if (current_module.flags and uf_finalize)<>0 then
unitinits.concat(Tai_const.Createname(make_mangledname('FINALIZE$',current_module.localsymtable,''),AT_FUNCTION,0))
else
unitinits.concat(Tai_const.Create_sym(nil));
inc(count);
end;
{ TableCount,InitCount }
unitinits.insert(Tai_const.Create_32bit(0));
unitinits.insert(Tai_const.Create_32bit(count));
unitinits.insert(Tai_symbol.Createname_global('INITFINAL',AT_DATA,0));
unitinits.insert(Tai_align.Create(const_align(4)));
unitinits.concat(Tai_symbol_end.Createname('INITFINAL'));
{ insert in data segment }
maybe_new_object_file(dataSegment);
dataSegment.concatlist(unitinits);
unitinits.free;
end;
procedure insertmemorysizes;
begin
{ stacksize can be specified and is now simulated }
dataSegment.concat(Tai_align.Create(const_align(4)));
dataSegment.concat(Tai_symbol.Createname_global('__stklen',AT_DATA,4));
dataSegment.concat(Tai_const.Create_32bit(stacksize));
dataSegment.concat(Tai_symbol.Createname_global('__heapsize',AT_DATA,4));
dataSegment.concat(Tai_const.Create_32bit(heapsize));
end;
procedure AddUnit(const s:string);
var
hp : tppumodule;
unitsym : tunitsym;
begin
{ load unit }
hp:=registerunit(current_module,s,'');
hp.loadppu;
hp.adddependency(current_module);
{ add to symtable stack }
tsymtable(hp.globalsymtable).next:=symtablestack;
symtablestack:=hp.globalsymtable;
if (m_mac in aktmodeswitches) and assigned(hp.globalmacrosymtable) then
begin
tsymtable(hp.globalmacrosymtable).next:=macrosymtablestack;
macrosymtablestack:=hp.globalmacrosymtable;
end;
{ insert unitsym }
unitsym:=tunitsym.create(s,hp.globalsymtable);
inc(unitsym.refs);
refsymtable.insert(unitsym);
{ add to used units }
current_module.addusedunit(hp,false,unitsym);
end;
procedure maybeloadvariantsunit;
var
hp : tmodule;
begin
{ Do we need the variants unit? Skip this
for VarUtils unit for bootstrapping }
if (current_module.flags and uf_uses_variants=0) or
(current_module.modulename^='VARUTILS') then
exit;
{ Variants unit already loaded? }
hp:=tmodule(loaded_units.first);
while assigned(hp) do
begin
if hp.modulename^='VARIANTS' then
exit;
hp:=tmodule(hp.next);
end;
{ Variants unit is not loaded yet, load it now }
Message(parser_w_implicit_uses_of_variants_unit);
AddUnit('Variants');
end;
procedure loaddefaultunits;
begin
{ are we compiling the system unit? }
if (cs_compilesystem in aktmoduleswitches) then
begin
{ create system defines }
createconstdefs;
{ we don't need to reset anything, it's already done in parser.pas }
exit;
end;
{ insert the system unit, it is allways the first }
symtablestack:=nil;
macrosymtablestack:=initialmacrosymtable;
AddUnit('System');
SystemUnit:=TGlobalSymtable(Symtablestack);
{ read default constant definitions }
make_ref:=false;
readconstdefs;
make_ref:=true;
{ Set the owner of errorsym and errortype to symtable to
prevent crashes when accessing .owner }
generrorsym.owner:=systemunit;
generrortype.def.owner:=systemunit;
{$ifdef cpufpemu}
{ Floating point emulation unit? }
if (cs_fp_emulation in aktmoduleswitches) then
AddUnit('SoftFpu');
{$endif cpufpemu}
{ Objpas unit? }
if m_objpas in aktmodeswitches then
AddUnit('ObjPas');
{ Macpas unit? }
if m_mac in aktmodeswitches then
AddUnit('MacPas');
{ Profile unit? Needed for go32v2 only }
if (cs_profile in aktmoduleswitches) and
(target_info.system in [system_i386_go32v2,system_i386_watcom]) then
AddUnit('Profile');
{ Units only required for main module }
if not(current_module.is_unit) then
begin
{ Heaptrc unit }
if (cs_gdb_heaptrc in aktglobalswitches) then
AddUnit('HeapTrc');
{ Lineinfo unit }
if (cs_gdb_lineinfo in aktglobalswitches) then
AddUnit('LineInfo');
{ Lineinfo unit }
if (cs_gdb_valgrind in aktglobalswitches) then
AddUnit('CMem');
end;
{ save default symtablestack }
defaultsymtablestack:=symtablestack;
defaultmacrosymtablestack:=macrosymtablestack;
end;
procedure loadautounits;
var
hs,s : string;
begin
hs:=autoloadunits;
repeat
s:=GetToken(hs,',');
if s='' then
break;
AddUnit(s);
until false;
end;
procedure loadunits;
var
s,sorg : stringid;
fn : string;
pu : tused_unit;
hp2 : tmodule;
hp3 : tsymtable;
unitsym : tunitsym;
top_of_macrosymtable : tsymtable;
begin
consume(_USES);
{$ifdef DEBUG}
test_symtablestack;
{$endif DEBUG}
repeat
s:=pattern;
sorg:=orgpattern;
consume(_ID);
{ support "<unit> in '<file>'" construct, but not for tp7 }
if not(m_tp7 in aktmodeswitches) then
begin
if try_to_consume(_OP_IN) then
fn:=FixFileName(get_stringconst)
else
fn:='';
end;
{ Give a warning if objpas is loaded }
if s='OBJPAS' then
Message(parser_w_no_objpas_use_mode);
{ Using the unit itself is not possible }
if (s<>current_module.modulename^) then
begin
{ check if the unit is already used }
hp2:=nil;
pu:=tused_unit(current_module.used_units.first);
while assigned(pu) do
begin
if (pu.u.modulename^=s) then
begin
hp2:=pu.u;
break;
end;
pu:=tused_unit(pu.next);
end;
if not assigned(hp2) then
hp2:=registerunit(current_module,sorg,fn)
else
Message1(sym_e_duplicate_id,s);
{ Create unitsym, we need to use the name as specified, we
can not use the modulename because that can be different
when -Un is used }
unitsym:=tunitsym.create(sorg,nil);
refsymtable.insert(unitsym);
{ the current module uses the unit hp2 }
current_module.addusedunit(hp2,true,unitsym);
end
else
Message1(sym_e_duplicate_id,s);
if token=_COMMA then
begin
pattern:='';
consume(_COMMA);
end
else
break;
until false;
{ Load the units }
top_of_macrosymtable:= macrosymtablestack;
pu:=tused_unit(current_module.used_units.first);
while assigned(pu) do
begin
{ Only load the units that are in the current
(interface/implementation) uses clause }
if pu.in_uses and
(pu.in_interface=current_module.in_interface) then
begin
tppumodule(pu.u).loadppu;
{ is our module compiled? then we can stop }
if current_module.state=ms_compiled then
exit;
{ add this unit to the dependencies }
pu.u.adddependency(current_module);
{ save crc values }
pu.checksum:=pu.u.crc;
pu.interface_checksum:=pu.u.interface_crc;
{ connect unitsym to the globalsymtable of the unit }
pu.unitsym.unitsymtable:=pu.u.globalsymtable;
end;
pu:=tused_unit(pu.next);
end;
{ set the symtable to systemunit so it gets reorderd correctly,
then insert the units in the symtablestack }
pu:=tused_unit(current_module.used_units.first);
symtablestack:=defaultsymtablestack;
macrosymtablestack:=defaultmacrosymtablestack;
while assigned(pu) do
begin
if pu.in_uses then
begin
{ Reinsert in symtablestack }
hp3:=symtablestack;
while assigned(hp3) do
begin
{ insert units only once ! }
if pu.u.globalsymtable=hp3 then
break;
hp3:=hp3.next;
{ unit isn't inserted }
if hp3=nil then
begin
tsymtable(pu.u.globalsymtable).next:=symtablestack;
symtablestack:=tsymtable(pu.u.globalsymtable);
if (m_mac in aktmodeswitches) and assigned(pu.u.globalmacrosymtable) then
begin
tsymtable(pu.u.globalmacrosymtable).next:=macrosymtablestack;
macrosymtablestack:=tsymtable(pu.u.globalmacrosymtable);
end;
{$ifdef DEBUG}
test_symtablestack;
{$endif DEBUG}
end;
end;
end;
pu:=tused_unit(pu.next);
end;
if assigned (current_module.globalmacrosymtable) then
top_of_macrosymtable.next.next:= macrosymtablestack
else
top_of_macrosymtable.next:= macrosymtablestack;
macrosymtablestack:= top_of_macrosymtable;
consume(_SEMICOLON);
end;
{$IfDef GDB}
procedure write_gdb_info;
procedure reset_unit_type_info;
var
hp : tmodule;
begin
hp:=tmodule(loaded_units.first);
while assigned(hp) do
begin
hp.is_stab_written:=false;
hp:=tmodule(hp.next);
end;
end;
procedure write_used_unit_type_info(hp:tmodule);
var
pu : tused_unit;
begin
pu:=tused_unit(hp.used_units.first);
while assigned(pu) do
begin
if not pu.u.is_stab_written then
begin
{ prevent infinte loop for circular dependencies }
pu.u.is_stab_written:=true;
{ write type info from used units, use a depth first
strategy to reduce the recursion in writing all
dependent stabs }
write_used_unit_type_info(pu.u);
if assigned(pu.u.globalsymtable) then
tglobalsymtable(pu.u.globalsymtable).concattypestabto(debuglist);
end;
pu:=tused_unit(pu.next);
end;
end;
var
vardebuglist : taasmoutput;
storefilepos : tfileposinfo;
begin
if not (cs_debuginfo in aktmoduleswitches) then
exit;
storefilepos:=aktfilepos;
aktfilepos:=current_module.mainfilepos;
{ include symbol that will be referenced from the program to be sure to
include this debuginfo .o file }
if current_module.is_unit then
begin
current_module.flags:=current_module.flags or uf_has_debuginfo;
debugList.concat(tai_symbol.Createname_global(make_mangledname('DEBUGINFO',current_module.globalsymtable,''),AT_DATA,0));
end
else
debugList.concat(tai_symbol.Createname_global(make_mangledname('DEBUGINFO',current_module.localsymtable,''),AT_DATA,0));
{ first write all global/local symbols again to a temp list. This will flag
all required tdefs. After that the temp list can be removed since the debuginfo is already
written to the stabs when the variables/consts were written }
{$warning Hack to get all needed types}
vardebuglist:=taasmoutput.create;
new_section(vardebuglist,sec_data,'',0);
if assigned(current_module.globalsymtable) then
tglobalsymtable(current_module.globalsymtable).concatstabto(vardebuglist);
if assigned(current_module.localsymtable) then
tstaticsymtable(current_module.localsymtable).concatstabto(vardebuglist);
vardebuglist.free;
{ reset unit type info flag }
reset_unit_type_info;
{ write used types from the used units }
write_used_unit_type_info(current_module);
{ last write the types from this unit }
if assigned(current_module.globalsymtable) then
tglobalsymtable(current_module.globalsymtable).concattypestabto(debuglist);
if assigned(current_module.localsymtable) then
tstaticsymtable(current_module.localsymtable).concattypestabto(debuglist);
{ include files }
if (cs_gdb_dbx in aktglobalswitches) then
begin
debugList.concat(tai_comment.Create(strpnew('EINCL of global '+
tglobalsymtable(current_module.globalsymtable).name^+' has index '+
tostr(tglobalsymtable(current_module.globalsymtable).moduleid))));
debugList.concat(Tai_stabs.Create(strpnew('"'+
tglobalsymtable(current_module.globalsymtable).name^+'",'+
tostr(N_EINCL)+',0,0,0')));
tglobalsymtable(current_module.globalsymtable).dbx_count_ok:={true}false;
dbx_counter:=tglobalsymtable(current_module.globalsymtable).prev_dbx_counter;
do_count_dbx:=false;
end;
aktfilepos:=storefilepos;
end;
{$EndIf GDB}
procedure reset_all_defs;
procedure reset_used_unit_defs(hp:tmodule);
var
pu : tused_unit;
begin
pu:=tused_unit(hp.used_units.first);
while assigned(pu) do
begin
if not pu.u.is_reset then
begin
{ prevent infinte loop for circular dependencies }
pu.u.is_reset:=true;
if assigned(pu.u.globalsymtable) then
begin
tglobalsymtable(pu.u.globalsymtable).reset_all_defs;
reset_used_unit_defs(pu.u);
end;
end;
pu:=tused_unit(pu.next);
end;
end;
var
hp2 : tmodule;
begin
hp2:=tmodule(loaded_units.first);
while assigned(hp2) do
begin
hp2.is_reset:=false;
hp2:=tmodule(hp2.next);
end;
reset_used_unit_defs(current_module);
end;
procedure free_localsymtables(st:tsymtable);
var
def : tstoreddef;
pd : tprocdef;
begin
def:=tstoreddef(st.defindex.first);
while assigned(def) do
begin
if def.deftype=procdef then
begin
pd:=tprocdef(def);
if assigned(pd.localst) and
(pd.localst.symtabletype<>staticsymtable) and
not((pd.proccalloption=pocall_inline) or
((current_module.flags and uf_local_browser)<>0)) then
begin
free_localsymtables(pd.localst);
pd.localst.free;
pd.localst:=nil;
end;
end;
def:=tstoreddef(def.indexnext);
end;
end;
procedure parse_implementation_uses;
begin
if token=_USES then
begin
loadunits;
{$ifdef DEBUG}
test_symtablestack;
{$endif DEBUG}
end;
end;
procedure setupglobalswitches;
begin
{ can't have local browser when no global browser }
if (cs_local_browser in aktmoduleswitches) and
not(cs_browser in aktmoduleswitches) then
exclude(aktmoduleswitches,cs_local_browser);
if (cs_create_pic in aktmoduleswitches) then
def_system_macro('FPC_PIC');
end;
function create_main_proc(const name:string;potype:tproctypeoption;st:tsymtable):tprocdef;
var
stt : tsymtable;
ps : tprocsym;
pd : tprocdef;
begin
{ there should be no current_procinfo available }
if assigned(current_procinfo) then
internalerror(200304275);
{Generate a procsym for main}
make_ref:=false;
{ try to insert in in static symtable ! }
stt:=symtablestack;
symtablestack:=st;
{ generate procsym }
ps:=tprocsym.create('$'+name);
{ main are allways used }
inc(ps.refs);
symtablestack.insert(ps);
pd:=tprocdef.create(main_program_level);
include(pd.procoptions,po_global);
pd.procsym:=ps;
ps.addprocdef(pd);
{ restore symtable }
make_ref:=true;
symtablestack:=stt;
{ set procdef options }
pd.proctypeoption:=potype;
pd.proccalloption:=pocall_default;
pd.forwarddef:=false;
pd.setmangledname(target_info.cprefix+name);
pd.aliasnames.insert(pd.mangledname);
handle_calling_convention(pd);
{ We don't need is a local symtable. Change it into the static
symtable }
pd.localst.free;
pd.localst:=st;
{ set procinfo and current_procinfo.procdef }
current_procinfo:=cprocinfo.create(nil);
current_module.procinfo:=current_procinfo;
current_procinfo.procdef:=pd;
{ return procdef }
create_main_proc:=pd;
{ main proc does always a call e.g. to init system unit }
include(current_procinfo.flags,pi_do_call);
end;
procedure release_main_proc(pd:tprocdef);
begin
{ this is a main proc, so there should be no parent }
if not(assigned(current_procinfo)) or
assigned(current_procinfo.parent) or
not(current_procinfo.procdef=pd) then
internalerror(200304276);
{ remove procinfo }
current_module.procinfo:=nil;
current_procinfo.free;
current_procinfo:=nil;
{ remove localst as it was replaced by staticsymtable }
pd.localst:=nil;
end;
procedure gen_implicit_initfinal(flag:word;st:tsymtable);
var
pd : tprocdef;
begin
{ update module flags }
current_module.flags:=current_module.flags or flag;
{ create procdef }
case flag of
uf_init :
begin
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'init_implicit'),potype_unitinit,st);
pd.aliasnames.insert(make_mangledname('INIT$',current_module.localsymtable,''));
end;
uf_finalize :
begin
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'finalize_implicit'),potype_unitfinalize,st);
pd.aliasnames.insert(make_mangledname('FINALIZE$',current_module.localsymtable,''));
end;
else
internalerror(200304253);
end;
tcgprocinfo(current_procinfo).code:=cnothingnode.create;
tcgprocinfo(current_procinfo).generate_code;
release_main_proc(pd);
end;
procedure delete_duplicate_macros(p:TNamedIndexItem; arg:pointer);
var
hp: tsymentry;
begin
hp:= current_module.localmacrosymtable.search(p.name);
if assigned(hp) then
current_module.localmacrosymtable.delete(hp);
end;
procedure proc_unit;
function is_assembler_generated:boolean;
begin
is_assembler_generated:=(Errorcount=0) and
not(
codeSegment.empty and
dataSegment.empty and
bssSegment.empty and
((importssection=nil) or importsSection.empty) and
((resourcesection=nil) or resourceSection.empty) and
((resourcestringlist=nil) or resourcestringList.empty)
);
end;
var
main_file: tinputfile;
st : tsymtable;
unitst : tglobalsymtable;
{$ifdef EXTDEBUG}
store_crc,
{$endif EXTDEBUG}
store_interface_crc : cardinal;
s1,s2 : ^string; {Saves stack space}
force_init_final : boolean;
pd : tprocdef;
unitname8 : string[8];
has_impl: boolean;
begin
if m_mac in aktmodeswitches then
begin
ConsolidateMode;
current_module.mode_switch_allowed:= false;
end;
consume(_UNIT);
if compile_level=1 then
Status.IsExe:=false;
if token=_ID then
begin
{ create filenames and unit name }
main_file := current_scanner.inputfile;
while assigned(main_file.next) do
main_file := main_file.next;
new(s1);
s1^:=current_module.modulename^;
current_module.SetFileName(main_file.path^+main_file.name^,true);
current_module.SetModuleName(orgpattern);
{ check for system unit }
new(s2);
s2^:=upper(SplitName(main_file.name^));
unitname8:=copy(current_module.modulename^,1,8);
if (cs_check_unit_name in aktglobalswitches) and
(
not(
(current_module.modulename^=s2^) or
(
(length(current_module.modulename^)>8) and
(unitname8=s2^)
)
)
or
(
(length(s1^)>8) and
(s1^<>current_module.modulename^)
)
) then
Message1(unit_e_illegal_unit_name,current_module.realmodulename^);
if (current_module.modulename^='SYSTEM') then
include(aktmoduleswitches,cs_compilesystem);
dispose(s2);
dispose(s1);
end;
consume(_ID);
consume(_SEMICOLON);
consume(_INTERFACE);
{ global switches are read, so further changes aren't allowed }
current_module.in_global:=false;
{ handle the global switches }
ConsolidateMode;
setupglobalswitches;
message1(unit_u_loading_interface_units,current_module.modulename^);
{ update status }
status.currentmodule:=current_module.realmodulename^;
{ maybe turn off m_objpas if we are compiling objpas }
if (current_module.modulename^='OBJPAS') then
exclude(aktmodeswitches,m_objpas);
{ maybe turn off m_mac if we are compiling macpas }
if (current_module.modulename^='MACPAS') then
exclude(aktmodeswitches,m_mac);
parse_only:=true;
{ generate now the global symboltable }
st:=tglobalsymtable.create(current_module.modulename^,current_module.moduleid);
refsymtable:=st;
unitst:=tglobalsymtable(st);
{ define first as local to overcome dependency conflicts }
current_module.localsymtable:=st;
{ the unit name must be usable as a unit specifier }
{ inside the unit itself (PM) }
{ this also forbids to have another symbol }
{ with the same name as the unit }
refsymtable.insert(tunitsym.create(current_module.realmodulename^,unitst));
macrosymtablestack:= initialmacrosymtable;
{ load default units, like the system unit }
loaddefaultunits;
current_module.localmacrosymtable.next:=macrosymtablestack;
if assigned(current_module.globalmacrosymtable) then
begin
current_module.globalmacrosymtable.next:= current_module.localmacrosymtable;
macrosymtablestack:=current_module.globalmacrosymtable;
end
else
macrosymtablestack:=current_module.localmacrosymtable;
{ reset }
make_ref:=true;
{ insert qualifier for the system unit (allows system.writeln) }
if not(cs_compilesystem in aktmoduleswitches) then
begin
if token=_USES then
begin
loadunits;
{ has it been compiled at a higher level ?}
if current_module.state=ms_compiled then
exit;
end;
{ ... but insert the symbol table later }
st.next:=symtablestack;
symtablestack:=st;
end
else
{ while compiling a system unit, some types are directly inserted }
begin
st.next:=symtablestack;
symtablestack:=st;
insert_intern_types(st);
end;
{ now we know the place to insert the constants }
constsymtable:=symtablestack;
{ move the global symtab from the temporary local to global }
current_module.globalsymtable:=current_module.localsymtable;
current_module.localsymtable:=nil;
reset_all_defs;
{ number all units, so we know if a unit is used by this unit or
needs to be added implicitly }
current_module.updatemaps;
{ ... parse the declarations }
Message1(parser_u_parsing_interface,current_module.realmodulename^);
read_interface_declarations;
{ leave when we got an error }
if (Errorcount>0) and not status.skip_error then
begin
Message1(unit_f_errors_in_unit,tostr(Errorcount));
status.skip_error:=true;
exit;
end;
{ Our interface is compiled, generate CRC and switch to implementation }
if not(cs_compilesystem in aktmoduleswitches) and
(Errorcount=0) then
tppumodule(current_module).getppucrc;
current_module.in_interface:=false;
current_module.interface_compiled:=true;
{ First reload all units depending on our interface, we need to do this
in the implementation part to prevent errorneous circular references }
reload_flagged_units;
{ Parse the implementation section }
if (m_mac in aktmodeswitches) and try_to_consume(_END) then
has_impl:= false
else
has_impl:= true;
parse_only:=false;
{ generates static symbol table }
st:=tstaticsymtable.create(current_module.modulename^,current_module.moduleid);
current_module.localsymtable:=st;
{ Swap the positions of the local and global macro sym table}
if assigned(current_module.globalmacrosymtable) then
begin
macrosymtablestack:=current_module.localmacrosymtable;
current_module.globalmacrosymtable.next:= current_module.localmacrosymtable.next;
current_module.localmacrosymtable.next:=current_module.globalmacrosymtable;
current_module.globalmacrosymtable.foreach_static(@delete_duplicate_macros, nil);
end;
{ remove the globalsymtable from the symtable stack }
{ to reinsert it after loading the implementation units }
symtablestack:=unitst.next;
{ we don't want implementation units symbols in unitsymtable !! PM }
refsymtable:=st;
if has_impl then
begin
consume(_IMPLEMENTATION);
Message1(unit_u_loading_implementation_units,current_module.modulename^);
{ Read the implementation units }
parse_implementation_uses;
end;
if current_module.state=ms_compiled then
exit;
{ reset ranges/stabs in exported definitions }
reset_all_defs;
{ All units are read, now give them a number }
current_module.updatemaps;
{ now we can change refsymtable }
refsymtable:=st;
{ but reinsert the global symtable as lasts }
unitst.next:=symtablestack;
symtablestack:=unitst;
{$ifdef DEBUG}
test_symtablestack;
{$endif DEBUG}
constsymtable:=symtablestack;
if has_impl then
begin
Message1(parser_u_parsing_implementation,current_module.modulename^);
if current_module.in_interface then
internalerror(200212285);
{ Compile the unit }
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'init'),potype_unitinit,st);
pd.aliasnames.insert(make_mangledname('INIT$',current_module.localsymtable,''));
tcgprocinfo(current_procinfo).parse_body;
tcgprocinfo(current_procinfo).generate_code;
tcgprocinfo(current_procinfo).resetprocdef;
{ save file pos for debuginfo }
current_module.mainfilepos:=current_procinfo.entrypos;
release_main_proc(pd);
end;
{ if the unit contains ansi/widestrings, initialization and
finalization code must be forced }
force_init_final:=tglobalsymtable(current_module.globalsymtable).needs_init_final or
tstaticsymtable(current_module.localsymtable).needs_init_final;
{ should we force unit initialization? }
{ this is a hack, but how can it be done better ? }
if force_init_final and ((current_module.flags and uf_init)=0) then
gen_implicit_initfinal(uf_init,st);
{ finalize? }
if has_impl and (token=_FINALIZATION) then
begin
{ set module options }
current_module.flags:=current_module.flags or uf_finalize;
{ Compile the finalize }
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'finalize'),potype_unitfinalize,st);
pd.aliasnames.insert(make_mangledname('FINALIZE$',current_module.localsymtable,''));
tcgprocinfo(current_procinfo).parse_body;
tcgprocinfo(current_procinfo).generate_code;
tcgprocinfo(current_procinfo).resetprocdef;
release_main_proc(pd);
end
else if force_init_final then
gen_implicit_initfinal(uf_finalize,st);
{ the last char should always be a point }
consume(_POINT);
{ Generate resoucestrings }
If ResourceStrings.ResStrCount>0 then
begin
ResourceStrings.CreateResourceStringList;
current_module.flags:=current_module.flags or uf_has_resources;
{ only write if no errors found }
if (Errorcount=0) then
ResourceStrings.WriteResourceFile(ForceExtension(current_module.ppufilename^,'.rst'));
end;
if (Errorcount=0) then
begin
{ tests, if all (interface) forwards are resolved }
tstoredsymtable(symtablestack).check_forwards;
{ check if all private fields are used }
tstoredsymtable(symtablestack).allprivatesused;
{ remove cross unit overloads }
tstoredsymtable(symtablestack).unchain_overloaded;
{ test static symtable }
tstoredsymtable(st).allsymbolsused;
tstoredsymtable(st).allprivatesused;
tstoredsymtable(st).check_forwards;
tstoredsymtable(st).checklabels;
tstoredsymtable(st).unchain_overloaded;
{ used units }
current_module.allunitsused;
end;
{ leave when we got an error }
if (Errorcount>0) and not status.skip_error then
begin
Message1(unit_f_errors_in_unit,tostr(Errorcount));
status.skip_error:=true;
exit;
end;
{ do we need to add the variants unit? }
maybeloadvariantsunit;
{ generate debuginfo }
{$ifdef GDB}
write_gdb_info;
{$endif GDB}
{ generate wrappers for interfaces }
gen_intf_wrappers(codesegment,current_module.globalsymtable);
gen_intf_wrappers(codesegment,current_module.localsymtable);
{ generate a list of threadvars }
InsertThreadvars;
{ generate imports }
if current_module.uses_imports then
importlib.generatelib;
{ insert own objectfile, or say that it's in a library
(no check for an .o when loading) }
if is_assembler_generated then
insertobjectfile
else
current_module.flags:=current_module.flags or uf_no_link;
if cs_local_browser in aktmoduleswitches then
current_module.localsymtable:=refsymtable;
if is_assembler_generated then
begin
{ create dwarf debuginfo }
create_dwarf;
{ finish asmlist by adding segment starts }
insertsegment;
{ assemble }
create_objectfile;
end;
{ Write out the ppufile after the object file has been created }
store_interface_crc:=current_module.interface_crc;
{$ifdef EXTDEBUG}
store_crc:=current_module.crc;
{$endif EXTDEBUG}
if (Errorcount=0) then
tppumodule(current_module).writeppu;
if not(cs_compilesystem in aktmoduleswitches) then
if store_interface_crc<>current_module.interface_crc then
Message1(unit_u_interface_crc_changed,current_module.ppufilename^);
{$ifdef EXTDEBUG}
if not(cs_compilesystem in aktmoduleswitches) then
if (store_crc<>current_module.crc) and simplify_ppu then
Message1(unit_u_implementation_crc_changed,current_module.ppufilename^);
{$endif EXTDEBUG}
{ release all local symtables that are not needed anymore }
free_localsymtables(current_module.globalsymtable);
free_localsymtables(current_module.localsymtable);
{ remove static symtable (=refsymtable) here to save some mem }
if not (cs_local_browser in aktmoduleswitches) then
begin
st.free;
current_module.localsymtable:=nil;
end;
{ leave when we got an error }
if (Errorcount>0) and not status.skip_error then
begin
Message1(unit_f_errors_in_unit,tostr(Errorcount));
status.skip_error:=true;
exit;
end;
Message1(unit_u_finished_compiling,current_module.modulename^);
end;
procedure proc_program(islibrary : boolean);
var
main_file : tinputfile;
st : tsymtable;
hp,hp2 : tmodule;
pd : tprocdef;
begin
DLLsource:=islibrary;
Status.IsLibrary:=IsLibrary;
Status.IsExe:=true;
parse_only:=false;
{ DLL defaults to create reloc info }
if islibrary then
begin
if not RelocSectionSetExplicitly then
RelocSection:=true;
end;
{ relocation works only without stabs under win32 !! PM }
{ internal assembler uses rva for stabs info
so it should work with relocated DLLs }
if RelocSection and
(target_info.system in [system_i386_win32,system_i386_wdosx]) and
(target_info.assem<>as_i386_pecoff) then
begin
include(aktglobalswitches,cs_link_strip);
{ Warning stabs info does not work with reloc section !! }
if cs_debuginfo in aktmoduleswitches then
begin
Message1(parser_w_parser_reloc_no_debug,current_module.mainsource^);
Message(parser_w_parser_win32_debug_needs_WN);
exclude(aktmoduleswitches,cs_debuginfo);
end;
end;
{ get correct output names }
main_file := current_scanner.inputfile;
while assigned(main_file.next) do
main_file := main_file.next;
current_module.SetFileName(main_file.path^+main_file.name^,true);
if islibrary then
begin
consume(_LIBRARY);
stringdispose(current_module.modulename);
stringdispose(current_module.realmodulename);
current_module.modulename:=stringdup(pattern);
current_module.realmodulename:=stringdup(orgpattern);
current_module.islibrary:=true;
exportlib.preparelib(orgpattern);
if tf_library_needs_pic in target_info.flags then
include(aktmoduleswitches,cs_create_pic);
consume(_ID);
consume(_SEMICOLON);
end
else
{ is there an program head ? }
if token=_PROGRAM then
begin
consume(_PROGRAM);
stringdispose(current_module.modulename);
stringdispose(current_module.realmodulename);
current_module.modulename:=stringdup(pattern);
current_module.realmodulename:=stringdup(orgpattern);
if (target_info.system in [system_i386_WIN32,system_i386_wdosx]) then
exportlib.preparelib(orgpattern);
consume(_ID);
if token=_LKLAMMER then
begin
consume(_LKLAMMER);
repeat
consume(_ID);
until not try_to_consume(_COMMA);
consume(_RKLAMMER);
end;
consume(_SEMICOLON);
end
else if (target_info.system in [system_i386_WIN32,system_i386_wdosx]) then
exportlib.preparelib(current_module.realmodulename^);
{ global switches are read, so further changes aren't allowed }
current_module.in_global:=false;
{ setup things using the switches }
ConsolidateMode;
setupglobalswitches;
{ set implementation flag }
current_module.in_interface:=false;
current_module.interface_compiled:=true;
{ insert after the unit symbol tables the static symbol table }
{ of the program }
st:=tstaticsymtable.create(current_module.modulename^,current_module.moduleid);
current_module.localsymtable:=st;
refsymtable:=st;
macrosymtablestack:= nil;
{ load standard units (system,objpas,profile unit) }
loaddefaultunits;
current_module.localmacrosymtable.next:=macrosymtablestack;
macrosymtablestack:=current_module.localmacrosymtable;
{ Load units provided on the command line }
loadautounits;
{Load the units used by the program we compile.}
if token=_USES then
loadunits;
{ reset ranges/stabs in exported definitions }
reset_all_defs;
{ All units are read, now give them a number }
current_module.updatemaps;
{Insert the name of the main program into the symbol table.}
if current_module.realmodulename^<>'' then
st.insert(tunitsym.create(current_module.realmodulename^,st));
{ ...is also constsymtable, this is the symtable where }
{ the elements of enumeration types are inserted }
constsymtable:=st;
Message1(parser_u_parsing_implementation,current_module.mainsource^);
{ The program intialization needs an alias, so it can be called
from the bootstrap code.}
if islibrary or
(target_info.system in [system_powerpc_macos,system_powerpc_darwin]) then
begin
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'main'),potype_proginit,st);
{ Win32 startup code needs a single name }
// if (target_info.system in [system_i386_win32,system_i386_wdosx]) then
pd.aliasnames.insert('PASCALMAIN');
end
else
begin
if (target_info.system = system_i386_netware) or
(target_info.system = system_i386_netwlibc) then
begin
pd:=create_main_proc('PASCALMAIN',potype_proginit,st); { main is need by the netware rtl }
end else
begin
pd:=create_main_proc('main',potype_proginit,st);
pd.aliasnames.insert('PASCALMAIN');
end;
end;
tcgprocinfo(current_procinfo).parse_body;
tcgprocinfo(current_procinfo).generate_code;
tcgprocinfo(current_procinfo).resetprocdef;
{ save file pos for debuginfo }
current_module.mainfilepos:=current_procinfo.entrypos;
release_main_proc(pd);
{ should we force unit initialization? }
if tstaticsymtable(current_module.localsymtable).needs_init_final then
begin
{ initialize section }
gen_implicit_initfinal(uf_init,st);
{ finalize section }
gen_implicit_initfinal(uf_finalize,st);
end;
{ Add symbol to the exports section for win32 so smartlinking a
DLL will include the edata section }
if assigned(exportlib) and
(target_info.system in [system_i386_win32,system_i386_wdosx]) and
assigned(current_module._exports.first) then
codesegment.concat(tai_const.create_sym(exportlib.edatalabel));
If ResourceStrings.ResStrCount>0 then
begin
ResourceStrings.CreateResourceStringList;
{ only write if no errors found }
if (Errorcount=0) then
ResourceStrings.WriteResourceFile(ForceExtension(current_module.ppufilename^,'.rst'));
end;
{ finalize? }
if token=_FINALIZATION then
begin
{ set module options }
current_module.flags:=current_module.flags or uf_finalize;
{ Compile the finalize }
pd:=create_main_proc(make_mangledname('',current_module.localsymtable,'finalize'),potype_unitfinalize,st);
pd.aliasnames.insert(make_mangledname('FINALIZE$',current_module.localsymtable,''));
tcgprocinfo(current_procinfo).parse_body;
tcgprocinfo(current_procinfo).generate_code;
tcgprocinfo(current_procinfo).resetprocdef;
release_main_proc(pd);
end;
{ consume the last point }
consume(_POINT);
if (Errorcount=0) then
begin
{ test static symtable }
tstoredsymtable(st).allsymbolsused;
tstoredsymtable(st).allprivatesused;
tstoredsymtable(st).check_forwards;
tstoredsymtable(st).checklabels;
tstoredsymtable(st).unchain_overloaded;
current_module.allunitsused;
end;
{ leave when we got an error }
if (Errorcount>0) and not status.skip_error then
begin
Message1(unit_f_errors_in_unit,tostr(Errorcount));
status.skip_error:=true;
exit;
end;
{ remove all unused units, this happends when units are removed
from the uses clause in the source and the ppu was already being loaded }
hp:=tmodule(loaded_units.first);
while assigned(hp) do
begin
hp2:=hp;
hp:=tmodule(hp.next);
if hp2.is_unit and
not assigned(hp2.globalsymtable) then
loaded_units.remove(hp2);
end;
{ do we need to add the variants unit? }
maybeloadvariantsunit;
{ generate debuginfo }
{$ifdef GDB}
write_gdb_info;
{$endif GDB}
{ generate wrappers for interfaces }
gen_intf_wrappers(codesegment,current_module.localsymtable);
{ generate a list of threadvars }
InsertThreadvars;
{ generate imports }
if current_module.uses_imports then
importlib.generatelib;
if islibrary or
(target_info.system in [system_i386_WIN32,system_i386_wdosx]) or
(target_info.system=system_i386_NETWARE) then
exportlib.generatelib;
{ insert Tables and StackLength }
insertThreadVarTablesTable;
insertResourceTablesTable;
insertinitfinaltable;
insertmemorysizes;
{ create dwarf debuginfo }
create_dwarf;
{ finish asmlist by adding segment starts }
insertsegment;
{ insert own objectfile }
insertobjectfile;
{ assemble and link }
create_objectfile;
{ release all local symtables that are not needed anymore }
free_localsymtables(current_module.localsymtable);
{ leave when we got an error }
if (Errorcount>0) and not status.skip_error then
begin
Message1(unit_f_errors_in_unit,tostr(Errorcount));
status.skip_error:=true;
exit;
end;
{ create the executable when we are at level 1 }
if (compile_level=1) then
begin
{ insert all .o files from all loaded units }
hp:=tmodule(loaded_units.first);
while assigned(hp) do
begin
linker.AddModuleFiles(hp);
hp:=tmodule(hp.next);
end;
{ write .def file }
if (cs_link_deffile in aktglobalswitches) then
deffile.writefile;
{ finally we can create a executable }
if (not current_module.is_unit) then
begin
if DLLSource then
linker.MakeSharedLibrary
else
linker.MakeExecutable;
end;
end;
end;
end.
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