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|
{
Copyright (c) 2013-2014 by Free Pascal Development Team
This unit implements basic parts of the package system
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 pkgutil;
{$i fpcdefs.inc}
interface
uses
fmodule,fpkg,link,cstreams,cclasses;
procedure createimportlibfromexternals;
Function RewritePPU(const PPUFn:String;OutStream:TCStream):Boolean;
procedure export_unit(u:tmodule);
procedure load_packages;
procedure add_package(const name:string;ignoreduplicates:boolean;direct:boolean);
procedure add_package_unit_ref(package:tpackage);
procedure add_package_libs(l:tlinker);
procedure check_for_indirect_package_usages(modules:tlinkedlist);
implementation
uses
sysutils,
globtype,systems,
cutils,
globals,verbose,
aasmbase,aasmdata,aasmtai,
symtype,symconst,symsym,symdef,symbase,symtable,
ppu,entfile,fpcp,
ncgutil,
export;
procedure procexport(const s : string);
var
hp : texported_item;
begin
hp:=texported_item.create;
hp.name:=stringdup(s);
hp.options:=hp.options+[eo_name];
exportlib.exportprocedure(hp);
end;
procedure varexport(const s : string);
var
hp : texported_item;
begin
hp:=texported_item.create;
hp.name:=stringdup(s);
hp.options:=hp.options+[eo_name];
exportlib.exportvar(hp);
end;
procedure exportprocsym(sym:tprocsym;symtable:tsymtable);
var
i : longint;
item : TCmdStrListItem;
pd : tprocdef;
begin
for i:=0 to tprocsym(sym).ProcdefList.Count-1 do
begin
pd:=tprocdef(tprocsym(sym).procdeflist[i]);
if not(pd.proccalloption in [pocall_internproc]) and
((pd.procoptions*[po_external])=[]) and
(
(symtable.symtabletype in [globalsymtable,recordsymtable,objectsymtable]) or
(
(symtable.symtabletype=staticsymtable) and
([po_public,po_has_public_name]*pd.procoptions<>[])
)
) and
not pd.is_generic then
begin
exportallprocdefnames(tprocsym(sym),pd,[]);
end;
end;
end;
procedure exportabstractrecordsymproc(sym:tobject;arg:pointer);
var
def : tabstractrecorddef;
begin
case tsym(sym).typ of
typesym:
begin
case ttypesym(sym).typedef.typ of
objectdef,
recorddef:
begin
def:=tabstractrecorddef(ttypesym(sym).typedef);
{ don't export generics or their nested types }
if df_generic in def.defoptions then
exit;
{ for cross unit type aliases this might happen }
if def.owner<>tsymtable(arg) then
exit;
def.symtable.symlist.foreachcall(@exportabstractrecordsymproc,def.symtable);
end;
end;
end;
procsym:
begin
{ don't export methods of interfaces }
if is_interface(tdef(tabstractrecordsymtable(arg).defowner)) then
exit;
exportprocsym(tprocsym(sym),tsymtable(arg));
end;
staticvarsym:
begin
varexport(tsym(sym).mangledname);
end;
end;
end;
procedure insert_export(sym : TObject;arg:pointer);
var
i : longint;
item : TCmdStrListItem;
def : tabstractrecorddef;
hp : texported_item;
publiconly : boolean;
begin
publiconly:=tsymtable(arg).symtabletype=staticsymtable;
case TSym(sym).typ of
{ ignore: }
unitsym,
syssym,
constsym,
namespacesym,
propertysym,
enumsym:
;
typesym:
begin
case ttypesym(sym).typedef.typ of
recorddef,
objectdef:
begin
def:=tabstractrecorddef(ttypesym(sym).typedef);
if def.is_generic then
exit;
{ for cross unit type aliases this might happen }
if def.owner<>tsymtable(arg) then
exit;
def.symtable.SymList.ForEachCall(@exportabstractrecordsymproc,def.symtable);
if (def.typ=objectdef) and (oo_has_vmt in tobjectdef(def).objectoptions) then
begin
hp:=texported_item.create;
hp.name:=stringdup(tobjectdef(def).vmt_mangledname(not (target_info.system in systems_indirect_var_imports)));
hp.options:=hp.options+[eo_name];
exportlib.exportvar(hp);
end;
end;
end;
end;
procsym:
begin
exportprocsym(tprocsym(sym),tsymtable(arg));
end;
staticvarsym:
begin
if publiconly and not (vo_is_public in tstaticvarsym(sym).varoptions) then
exit;
if target_info.system in systems_indirect_var_imports then
varexport(tsym(sym).mangledname)
else
varexport(tsym(sym).mangledname+indirect_suffix);
end;
else
begin
writeln('unknown: ',TSym(sym).typ);
end;
end;
end;
procedure export_unit(u: tmodule);
var
i : longint;
isindirect : boolean;
begin
{ For targets that need indirect variable exports we export the direct symbol
and an indirect symbol will be generated in the consuming library/program.
On systems that don't have indirect exports we directly export only the
indirect symbols }
u.globalsymtable.symlist.ForEachCall(@insert_export,u.globalsymtable);
{ check localsymtable for exports too to get public symbols }
u.localsymtable.symlist.ForEachCall(@insert_export,u.localsymtable);
{ export assembler symbols }
for i:=0 to u.globalasmsyms.count-1 do
with tasmsymbol(u.globalasmsyms[i]) do
if bind in [AB_GLOBAL] then
case typ of
AT_FUNCTION:
procexport(name);
AT_DATA:
begin
isindirect := pos(indirect_suffix,name)=length(name)-length(indirect_suffix)+1;
if (isindirect and (target_info.system in systems_indirect_var_imports)) or
(not isindirect and not (target_info.system in systems_indirect_var_imports)) then
continue;
varexport(name);
end;
else
Writeln('Ignoring asm symbol ',typ);
end;
end;
Function RewritePPU(const PPUFn:String;OutStream:TCStream):Boolean;
Var
MakeStatic : Boolean;
Var
buffer : array[0..$1fff] of byte;
inppu,
outppu : tppufile;
b,
untilb : byte;
l,m : longint;
f : file;
ext,
s : string;
ppuversion : dword;
begin
Result:=false;
MakeStatic:=False;
inppu:=tppufile.create(PPUFn);
if not inppu.openfile then
begin
inppu.free;
Comment(V_Error,'Could not open : '+PPUFn);
Exit;
end;
{ Check the ppufile }
if not inppu.CheckPPUId then
begin
inppu.free;
Comment(V_Error,'Not a PPU File : '+PPUFn);
Exit;
end;
ppuversion:=inppu.getversion;
if ppuversion<CurrentPPUVersion then
begin
inppu.free;
Comment(V_Error,'Wrong PPU Version '+tostr(ppuversion)+' in '+PPUFn);
Exit;
end;
{ Already a lib? }
if (inppu.header.common.flags and uf_in_library)<>0 then
begin
inppu.free;
Comment(V_Error,'PPU is already in a library : '+PPUFn);
Exit;
end;
{ We need a static linked unit, but we also accept those without .o file }
if (inppu.header.common.flags and (uf_static_linked or uf_no_link))=0 then
begin
inppu.free;
Comment(V_Error,'PPU is not static linked : '+PPUFn);
Exit;
end;
{ Check if shared is allowed }
if tsystem(inppu.header.common.target) in [system_i386_go32v2] then
begin
Comment(V_Error,'Shared library not supported for ppu target, switching to static library');
MakeStatic:=true;
end;
{ Create the new ppu }
outppu:=tppufile.create(PPUFn);
outppu.createstream(OutStream);
{ Create new header, with the new flags }
outppu.header:=inppu.header;
outppu.header.common.flags:=outppu.header.common.flags or uf_in_library;
if MakeStatic then
outppu.header.common.flags:=outppu.header.common.flags or uf_static_linked
else
outppu.header.common.flags:=outppu.header.common.flags or uf_shared_linked;
{ read until the object files are found }
untilb:=iblinkunitofiles;
repeat
b:=inppu.readentry;
if b in [ibendinterface,ibend] then
begin
inppu.free;
outppu.free;
Comment(V_Error,'No files to be linked found : '+PPUFn);
Exit;
end;
if b<>untilb then
begin
repeat
inppu.getdatabuf(buffer,sizeof(buffer),l);
outppu.putdata(buffer,l);
until l<sizeof(buffer);
outppu.writeentry(b);
end;
until (b=untilb);
{ we have now reached the section for the files which need to be added,
now add them to the list }
case b of
iblinkunitofiles :
begin
{ add all o files, and save the entry when not creating a static
library to keep staticlinking possible }
while not inppu.endofentry do
begin
s:=inppu.getstring;
m:=inppu.getlongint;
if not MakeStatic then
begin
outppu.putstring(s);
outppu.putlongint(m);
end;
current_module.linkotherofiles.add(s,link_always);;
end;
if not MakeStatic then
outppu.writeentry(b);
end;
{ iblinkunitstaticlibs :
begin
AddToLinkFiles(ExtractLib(inppu.getstring));
if not inppu.endofentry then
begin
repeat
inppu.getdatabuf(buffer^,bufsize,l);
outppu.putdata(buffer^,l);
until l<bufsize;
outppu.writeentry(b);
end;
end; }
end;
{ just add a new entry with the new lib }
if MakeStatic then
begin
outppu.putstring('imp'+current_module.realmodulename^);
outppu.putlongint(link_static);
outppu.writeentry(iblinkunitstaticlibs)
end
else
begin
outppu.putstring('imp'+current_module.realmodulename^);
outppu.putlongint(link_shared);
outppu.writeentry(iblinkunitsharedlibs);
end;
{ read all entries until the end and write them also to the new ppu }
repeat
b:=inppu.readentry;
{ don't write ibend, that's written automatically }
if b<>ibend then
begin
if b=iblinkothersharedlibs then
begin
while not inppu.endofentry do
begin
s:=inppu.getstring;
m:=inppu.getlongint;
outppu.putstring(s);
outppu.putlongint(m);
{ strip lib prefix }
if copy(s,1,3)='lib' then
delete(s,1,3);
ext:=ExtractFileExt(s);
if ext<>'' then
delete(s,length(s)-length(ext)+1,length(ext));
current_module.linkOtherSharedLibs.add(s,link_always);
end;
end
else
repeat
inppu.getdatabuf(buffer,sizeof(buffer),l);
outppu.putdata(buffer,l);
until l<sizeof(buffer);
outppu.writeentry(b);
end;
until b=ibend;
{ write the last stuff and close }
outppu.flush;
outppu.writeheader;
outppu.free;
inppu.free;
Result:=True;
end;
procedure load_packages;
var
i,j : longint;
pcp: tpcppackage;
entry,
entryreq : ppackageentry;
name,
uname : string;
begin
if not (tf_supports_packages in target_info.flags) then
exit;
i:=0;
while i<packagelist.count do
begin
entry:=ppackageentry(packagelist[i]);
if assigned(entry^.package) then
internalerror(2013053104);
//Comment(V_Info,'Loading package: '+entry^.realpkgname);
pcp:=tpcppackage.create(entry^.realpkgname);
pcp.loadpcp;
entry^.package:=pcp;
{ add all required packages that are not yet part of packagelist }
for j:=0 to pcp.requiredpackages.count-1 do
begin
name:=pcp.requiredpackages.NameOfIndex(j);
uname:=upper(name);
if not assigned(packagelist.Find(uname)) then
begin
New(entryreq);
entryreq^.realpkgname:=name;
entryreq^.package:=nil;
entryreq^.usedunits:=0;
entryreq^.direct:=false;
packagelist.add(uname,entryreq);
end;
end;
Inc(i);
end;
{ all packages are now loaded, so we can fill in the links of the required packages }
for i:=0 to packagelist.count-1 do
begin
entry:=ppackageentry(packagelist[i]);
if not assigned(entry^.package) then
internalerror(2015111301);
for j:=0 to entry^.package.requiredpackages.count-1 do
begin
if assigned(entry^.package.requiredpackages[j]) then
internalerror(2015111303);
entryreq:=packagelist.find(upper(entry^.package.requiredpackages.NameOfIndex(j)));
if not assigned(entryreq) then
internalerror(2015111302);
entry^.package.requiredpackages[j]:=entryreq^.package;
end;
end;
end;
procedure add_package(const name:string;ignoreduplicates:boolean;direct:boolean);
var
entry : ppackageentry;
i : longint;
begin
for i:=0 to packagelist.count-1 do
begin
if packagelist.nameofindex(i)=name then
begin
if not ignoreduplicates then
Message1(package_e_duplicate_package,name);
exit;
end;
end;
new(entry);
entry^.package:=nil;
entry^.realpkgname:=name;
entry^.usedunits:=0;
entry^.direct:=direct;
packagelist.add(upper(name),entry);
end;
procedure add_package_unit_ref(package: tpackage);
var
pkgentry : ppackageentry;
begin
pkgentry:=ppackageentry(packagelist.find(package.packagename^));
if not assigned(pkgentry) then
internalerror(2015100301);
inc(pkgentry^.usedunits);
end;
procedure add_package_libs(l:tlinker);
var
pkgentry : ppackageentry;
i : longint;
pkgname : tpathstr;
begin
if target_info.system in systems_indirect_var_imports then
{ we're using import libraries anyway }
exit;
for i:=0 to packagelist.count-1 do
begin
pkgentry:=ppackageentry(packagelist[i]);
if pkgentry^.usedunits>0 then
begin
//writeln('package used: ',pkgentry^.realpkgname);
pkgname:=pkgentry^.package.pplfilename;
if copy(pkgname,1,length(target_info.sharedlibprefix))=target_info.sharedlibprefix then
delete(pkgname,1,length(target_info.sharedlibprefix));
if copy(pkgname,length(pkgname)-length(target_info.sharedlibext)+1,length(target_info.sharedlibext))=target_info.sharedlibext then
delete(pkgname,length(pkgname)-length(target_info.sharedlibext)+1,length(target_info.sharedlibext));
//writeln('adding library: ', pkgname);
l.sharedlibfiles.concat(pkgname);
end
else
{writeln('ignoring package: ',pkgentry^.realpkgname)};
end;
end;
procedure check_for_indirect_package_usages(modules:tlinkedlist);
var
uu : tused_unit;
pentry : ppackageentry;
begin
uu:=tused_unit(modules.first);
while assigned(uu) do
begin
if assigned(uu.u.package) then
begin
pentry:=ppackageentry(packagelist.find(uu.u.package.packagename^));
if not assigned(pentry) then
internalerror(2015112304);
if not pentry^.direct then
Message2(package_w_unit_from_indirect_package,uu.u.realmodulename^,uu.u.package.realpackagename^);
end;
uu:=tused_unit(uu.Next);
end;
end;
procedure createimportlibfromexternals;
type
tcacheentry=record
pkg:tpackage;
sym:tasmsymbol;
end;
pcacheentry=^tcacheentry;
var
cache : tfphashlist;
alreadyloaded : tfpobjectlist;
function findpackagewithsym(symname:tsymstr):tcacheentry;
var
i,j : longint;
pkgentry : ppackageentry;
unitentry : pcontainedunit;
begin
for i:=0 to packagelist.count-1 do
begin
pkgentry:=ppackageentry(packagelist[i]);
for j:=0 to pkgentry^.package.containedmodules.count-1 do
begin
unitentry:=pcontainedunit(pkgentry^.package.containedmodules[j]);
if not assigned(unitentry^.module) then
{ the unit is not loaded }
continue;
result.sym:=tasmsymbol(tmodule(unitentry^.module).globalasmsyms.find(symname));
if assigned(result.sym) then
begin
{ completely ignore other external symbols }
if result.sym.bind in [ab_external,ab_weak_external] then
begin
result.sym:=nil;
continue;
end;
{ only accept global symbols of the used unit }
if result.sym.bind<>ab_global then
begin
result.sym:=nil;
result.pkg:=nil;
end
else
result.pkg:=pkgentry^.package;
exit;
end;
end;
end;
result.sym:=nil;
result.pkg:=nil;
end;
procedure processasmsyms(symlist:tfphashobjectlist);
var
i,j,k : longint;
sym : tasmsymbol;
cacheentry : pcacheentry;
list : TAsmList;
labind : tasmsymbol;
psym : tsymentry;
pd : tprocdef;
found : boolean;
impname,symname : TSymStr;
suffixidx : longint;
begin
for i:=0 to symlist.count-1 do
begin
sym:=tasmsymbol(symlist[i]);
if sym.bind<>ab_external then
continue;
{ remove the indirect suffix }
symname:=sym.name;
suffixidx:=pos(indirect_suffix,symname);
if suffixidx=length(symname)-length(indirect_suffix)+1 then
symname:=copy(symname,1,suffixidx-1);
{ did we already import the symbol? }
cacheentry:=pcacheentry(cache.find(symname));
if assigned(cacheentry) then
continue;
{ was the symbol already imported in the previous pass? }
found:=false;
for j:=0 to alreadyloaded.count-1 do
begin
psym:=tsymentry(alreadyloaded[j]);
case psym.typ of
procsym:
for k:=0 to tprocsym(psym).procdeflist.count-1 do
begin
pd:=tprocdef(tprocsym(psym).procdeflist[k]);
if has_alias_name(pd,symname) then
begin
found:=true;
break;
end;
end;
staticvarsym:
if tstaticvarsym(psym).mangledname=symname then
found:=true;
else
internalerror(2014101005);
end;
if found then
break;
end;
if found then begin
//writeln('asm symbol ', symname, ' is already imported');
{ add a dummy entry }
new(cacheentry);
cacheentry^.pkg:=nil;
cacheentry^.sym:=sym;
cache.add(symname,cacheentry);
continue;
end;
new(cacheentry);
cacheentry^:=findpackagewithsym(symname);
cache.add(symname,cacheentry);
{ use cacheentry^.sym instead of sym, because for the later typ
is always at_none in case of an external symbol }
if assigned(cacheentry^.pkg) then
begin
impname:=symname;
if cacheentry^.sym.typ=AT_DATA then
{ import as the $indirect symbol if it as a variable }
impname:=symname+indirect_suffix;
current_module.addexternalimport(cacheentry^.pkg.pplfilename,symname,impname,0,cacheentry^.sym.typ=at_data,false);
end;
end;
end;
procedure import_proc_symbol(pd:tprocdef;pkg:tpackage);
var
item : TCmdStrListItem;
begin
item := TCmdStrListItem(pd.aliasnames.first);
if not assigned(item) then
{ at least import the mangled name }
current_module.addexternalimport(pkg.pplfilename,pd.mangledname,pd.mangledname,0,false,false);
while assigned(item) do
begin
current_module.addexternalimport(pkg.pplfilename,item.str,item.str,0,false,false);
item := TCmdStrListItem(item.next);
end;
end;
procedure processimportedsyms(syms:tfpobjectlist);
var
i,j,k,l : longint;
pkgentry : ppackageentry;
sym : TSymEntry;
srsymtable : tsymtable;
module : tmodule;
unitentry : pcontainedunit;
name : tsymstr;
labind : tasmsymbol;
pd : tprocdef;
list : tasmlist;
begin
for i:=0 to syms.count-1 do
begin
sym:=tsymentry(syms[i]);
if not (sym.typ in [staticvarsym,procsym]) then
continue;
if alreadyloaded.indexof(sym)>=0 then
begin
//writeln('symbol ', sym.name, ' already imported');
continue;
end;
{ determine the unit of the symbol }
srsymtable:=sym.owner;
while not (srsymtable.symtabletype in [staticsymtable,globalsymtable]) do
srsymtable:=srsymtable.defowner.owner;
module:=tmodule(loaded_units.first);
while assigned(module) do
begin
if (module.globalsymtable=srsymtable) or (module.localsymtable=srsymtable) then
break;
module:=tmodule(module.next);
end;
if not assigned(module) then
internalerror(2014101001);
if (uf_in_library and module.flags)=0 then
{ unit is not part of a package, so no need to handle it }
continue;
//writeln('found symbol ', sym.name, ' in package unit ', module.modulename^);
{ loaded by a package? }
for j:=0 to packagelist.count-1 do
begin
pkgentry:=ppackageentry(packagelist[j]);
for k:=0 to pkgentry^.package.containedmodules.count-1 do
begin
unitentry:=pcontainedunit(pkgentry^.package.containedmodules[k]);
if unitentry^.module=module then
begin
//writeln('symbol ', sym.name, ' is part of package ', pkgentry^.package.packagename^);
case sym.typ of
staticvarsym:
begin
name:=tstaticvarsym(sym).mangledname;
current_module.addexternalimport(pkgentry^.package.pplfilename,name,name+indirect_suffix,0,true,false);
end;
procsym:
begin
for l:=0 to tprocsym(sym).procdeflist.count-1 do
begin
pd:=tprocdef(tprocsym(sym).procdeflist[l]);
import_proc_symbol(pd,pkgentry^.package);
end;
end;
else
internalerror(2014101001);
end;
alreadyloaded.add(sym);
end;
end;
end;
end;
end;
var
unitentry : pcontainedunit;
i : longint;
sym : tasmsymbol;
module : tmodule;
begin
cache:=tfphashlist.create;
{ check each external asm symbol of each unit of the package whether it is
contained in the unit of a loaded package (and thus an import entry
is needed) }
alreadyloaded:=tfpobjectlist.create(false);
{ we were called from a program/library }
{ first pass to find all symbols that were not loaded by asm name }
module:=tmodule(loaded_units.first);
while assigned(module) do
begin
//writeln('processing imported symbols of unit ', module.modulename^);
if not assigned(module.package) then
begin
processimportedsyms(module.unitimportsyms);
{ this unit is not part of a package }
(*if module=current_module then
{ this is the main file, which does not fill globalasmsyms }
processasmsyms(tasmdata(module.asmdata).asmsymboldict)
else
{ this is an ordinary unit }
processasmsyms(module.globalasmsyms);*)
end
{else
writeln(module.modulename^, ' is a package unit; ignoring')};
module:=tmodule(module.next);
end;
{ second pass to find all symbols that were loaded by asm name }
module:=tmodule(loaded_units.first);
while assigned(module) do
begin
if not assigned(module.package) then
begin
//writeln('processing assembler symbols of unit ', module.modulename^);
if module=current_module then
{ this is the main file, which does not fill globalasmsyms }
processasmsyms(tasmdata(module.asmdata).asmsymboldict)
else
{ this is an ordinary unit }
processasmsyms(module.globalasmsyms);
end;
module:=tmodule(module.next);
end;
alreadyloaded.free;
for i:=0 to cache.count-1 do
dispose(pcacheentry(cache[i]));
cache.free;
end;
end.
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