/
toobj.c
1245 lines (1044 loc) · 33.5 KB
/
toobj.c
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/* Compiler implementation of the D programming language
* Copyright (c) 1999-2014 by Digital Mars
* All Rights Reserved
* written by Walter Bright
* http://www.digitalmars.com
* Distributed under the Boost Software License, Version 1.0.
* http://www.boost.org/LICENSE_1_0.txt
* https://github.com/D-Programming-Language/dmd/blob/master/src/toobj.c
*/
#include <stdio.h>
#include <stddef.h>
#include <time.h>
#include <assert.h>
#include "mars.h"
#include "module.h"
#include "mtype.h"
#include "declaration.h"
#include "statement.h"
#include "enum.h"
#include "aggregate.h"
#include "init.h"
#include "attrib.h"
#include "id.h"
#include "import.h"
#include "template.h"
#include "nspace.h"
#include "hdrgen.h"
#include "rmem.h"
#include "target.h"
#include "cc.h"
#include "global.h"
#include "oper.h"
#include "code.h"
#include "type.h"
#include "dt.h"
#include "cgcv.h"
#include "outbuf.h"
#include "irstate.h"
extern bool obj_includelib(const char *name);
void obj_startaddress(Symbol *s);
void obj_lzext(Symbol *s1,Symbol *s2);
void TypeInfo_toDt(dt_t **pdt, TypeInfoDeclaration *d);
dt_t *Initializer_toDt(Initializer *init);
dt_t **Type_toDt(Type *t, dt_t **pdt);
void ClassDeclaration_toDt(ClassDeclaration *cd, dt_t **pdt);
void StructDeclaration_toDt(StructDeclaration *sd, dt_t **pdt);
Symbol *toSymbol(Dsymbol *s);
void toDebug(TypedefDeclaration *tdd);
void toDebug(EnumDeclaration *ed);
void toDebug(StructDeclaration *sd);
void toDebug(ClassDeclaration *cd);
/* ================================================================== */
// Put out instance of ModuleInfo for this Module
void Module::genmoduleinfo()
{
//printf("Module::genmoduleinfo() %s\n", toChars());
if (! Module::moduleinfo)
{
ObjectNotFound(Id::ModuleInfo);
}
Symbol *msym = toSymbol(this);
//////////////////////////////////////////////
csym->Sclass = SCglobal;
csym->Sfl = FLdata;
dt_t *dt = NULL;
ClassDeclarations aclasses;
//printf("members->dim = %d\n", members->dim);
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *member = (*members)[i];
//printf("\tmember '%s'\n", member->toChars());
member->addLocalClass(&aclasses);
}
// importedModules[]
size_t aimports_dim = aimports.dim;
for (size_t i = 0; i < aimports.dim; i++)
{
Module *m = aimports[i];
if (!m->needmoduleinfo)
aimports_dim--;
}
FuncDeclaration *sgetmembers = findGetMembers();
// These must match the values in druntime/src/object_.d
#define MIstandalone 0x4
#define MItlsctor 0x8
#define MItlsdtor 0x10
#define MIctor 0x20
#define MIdtor 0x40
#define MIxgetMembers 0x80
#define MIictor 0x100
#define MIunitTest 0x200
#define MIimportedModules 0x400
#define MIlocalClasses 0x800
#define MIname 0x1000
unsigned flags = 0;
if (!needmoduleinfo)
flags |= MIstandalone;
if (sctor)
flags |= MItlsctor;
if (sdtor)
flags |= MItlsdtor;
if (ssharedctor)
flags |= MIctor;
if (sshareddtor)
flags |= MIdtor;
if (sgetmembers)
flags |= MIxgetMembers;
if (sictor)
flags |= MIictor;
if (stest)
flags |= MIunitTest;
if (aimports_dim)
flags |= MIimportedModules;
if (aclasses.dim)
flags |= MIlocalClasses;
flags |= MIname;
dtdword(&dt, flags); // _flags
dtdword(&dt, 0); // _index
if (flags & MItlsctor)
dtxoff(&dt, sctor, 0, TYnptr);
if (flags & MItlsdtor)
dtxoff(&dt, sdtor, 0, TYnptr);
if (flags & MIctor)
dtxoff(&dt, ssharedctor, 0, TYnptr);
if (flags & MIdtor)
dtxoff(&dt, sshareddtor, 0, TYnptr);
if (flags & MIxgetMembers)
dtxoff(&dt, toSymbol(sgetmembers), 0, TYnptr);
if (flags & MIictor)
dtxoff(&dt, sictor, 0, TYnptr);
if (flags & MIunitTest)
dtxoff(&dt, stest, 0, TYnptr);
if (flags & MIimportedModules)
{
dtsize_t(&dt, aimports_dim);
for (size_t i = 0; i < aimports.dim; i++)
{ Module *m = aimports[i];
if (m->needmoduleinfo)
{
Symbol *s = toSymbol(m);
/* Weak references don't pull objects in from the library,
* they resolve to 0 if not pulled in by something else.
* Don't pull in a module just because it was imported.
*/
s->Sflags |= SFLweak;
dtxoff(&dt, s, 0, TYnptr);
}
}
}
if (flags & MIlocalClasses)
{
dtsize_t(&dt, aclasses.dim);
for (size_t i = 0; i < aclasses.dim; i++)
{
ClassDeclaration *cd = aclasses[i];
dtxoff(&dt, toSymbol(cd), 0, TYnptr);
}
}
if (flags & MIname)
{
// Put out module name as a 0-terminated string, to save bytes
nameoffset = dt_size(dt);
const char *name = toPrettyChars();
namelen = strlen(name);
dtnbytes(&dt, namelen + 1, name);
//printf("nameoffset = x%x\n", nameoffset);
}
csym->Sdt = dt;
out_readonly(csym);
outdata(csym);
//////////////////////////////////////////////
objmod->moduleinfo(msym);
}
/* ================================================================== */
void Dsymbol::toObjFile(bool multiobj)
{
//printf("Dsymbol::toObjFile('%s')\n", toChars());
// ignore
}
/* ================================================================== */
void ClassDeclaration::toObjFile(bool multiobj)
{
unsigned offset;
Symbol *sinit;
enum_SC scclass;
//printf("ClassDeclaration::toObjFile('%s')\n", toChars());
if (type->ty == Terror)
{ error("had semantic errors when compiling");
return;
}
if (!members)
return;
if (multiobj && !hasStaticCtorOrDtor())
{ obj_append(this);
return;
}
if (global.params.symdebug)
toDebug(this);
assert(!scope); // semantic() should have been run to completion
scclass = SCglobal;
if (isInstantiated())
scclass = SCcomdat;
// Put out the members
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *member = (*members)[i];
/* There might be static ctors in the members, and they cannot
* be put in separate obj files.
*/
member->toObjFile(multiobj);
}
// Generate C symbols
toSymbol(this);
toVtblSymbol();
sinit = toInitializer();
//////////////////////////////////////////////
// Generate static initializer
sinit->Sclass = scclass;
sinit->Sfl = FLdata;
ClassDeclaration_toDt(this, &sinit->Sdt);
out_readonly(sinit);
outdata(sinit);
//////////////////////////////////////////////
// Put out the TypeInfo
type->genTypeInfo(NULL);
//type->vtinfo->toObjFile(multiobj);
//////////////////////////////////////////////
// Put out the ClassInfo
csym->Sclass = scclass;
csym->Sfl = FLdata;
/* The layout is:
{
void **vptr;
monitor_t monitor;
byte[] initializer; // static initialization data
char[] name; // class name
void *[] vtbl;
Interface[] interfaces;
ClassInfo *base; // base class
void *destructor;
void *invariant; // class invariant
ClassFlags flags;
void *deallocator;
OffsetTypeInfo[] offTi;
void *defaultConstructor;
//const(MemberInfo[]) function(string) xgetMembers; // module getMembers() function
void *xgetRTInfo;
//TypeInfo typeinfo;
}
*/
dt_t *dt = NULL;
unsigned classinfo_size = global.params.isLP64 ? CLASSINFO_SIZE_64 : CLASSINFO_SIZE; // must be ClassInfo.size
offset = classinfo_size;
if (Type::typeinfoclass)
{
if (Type::typeinfoclass->structsize != classinfo_size)
{
#ifdef DEBUG
printf("CLASSINFO_SIZE = x%x, Type::typeinfoclass->structsize = x%x\n", offset, Type::typeinfoclass->structsize);
#endif
error("mismatch between dmd and object.d or object.di found. Check installation and import paths with -v compiler switch.");
fatal();
}
}
if (Type::typeinfoclass)
dtxoff(&dt, Type::typeinfoclass->toVtblSymbol(), 0, TYnptr); // vtbl for ClassInfo
else
dtsize_t(&dt, 0); // BUG: should be an assert()
dtsize_t(&dt, 0); // monitor
// initializer[]
assert(structsize >= 8 || (cpp && structsize >= 4));
dtsize_t(&dt, structsize); // size
dtxoff(&dt, sinit, 0, TYnptr); // initializer
// name[]
const char *name = ident->toChars();
size_t namelen = strlen(name);
if (!(namelen > 9 && memcmp(name, "TypeInfo_", 9) == 0))
{ name = toPrettyChars();
namelen = strlen(name);
}
dtsize_t(&dt, namelen);
dtabytes(&dt, TYnptr, 0, namelen + 1, name);
// vtbl[]
dtsize_t(&dt, vtbl.dim);
dtxoff(&dt, vtblsym, 0, TYnptr);
// interfaces[]
dtsize_t(&dt, vtblInterfaces->dim);
if (vtblInterfaces->dim)
dtxoff(&dt, csym, offset, TYnptr); // (*)
else
dtsize_t(&dt, 0);
// base
if (baseClass)
dtxoff(&dt, toSymbol(baseClass), 0, TYnptr);
else
dtsize_t(&dt, 0);
// destructor
if (dtor)
dtxoff(&dt, toSymbol(dtor), 0, TYnptr);
else
dtsize_t(&dt, 0);
// invariant
if (inv)
dtxoff(&dt, toSymbol(inv), 0, TYnptr);
else
dtsize_t(&dt, 0);
// flags
ClassFlags::Type flags = ClassFlags::hasOffTi;
if (isCOMclass()) flags |= ClassFlags::isCOMclass;
if (isCPPclass()) flags |= ClassFlags::isCPPclass;
flags |= ClassFlags::hasGetMembers;
flags |= ClassFlags::hasTypeInfo;
if (ctor)
flags |= ClassFlags::hasCtor;
for (ClassDeclaration *cd = this; cd; cd = cd->baseClass)
{
if (cd->dtor)
{
flags |= ClassFlags::hasDtor;
break;
}
}
if (isabstract)
flags |= ClassFlags::isAbstract;
for (ClassDeclaration *cd = this; cd; cd = cd->baseClass)
{
if (cd->members)
{
for (size_t i = 0; i < cd->members->dim; i++)
{
Dsymbol *sm = (*cd->members)[i];
//printf("sm = %s %s\n", sm->kind(), sm->toChars());
if (sm->hasPointers())
goto L2;
}
}
}
flags |= ClassFlags::noPointers;
L2:
dtsize_t(&dt, flags);
// deallocator
if (aggDelete)
dtxoff(&dt, toSymbol(aggDelete), 0, TYnptr);
else
dtsize_t(&dt, 0);
// offTi[]
dtsize_t(&dt, 0);
dtsize_t(&dt, 0); // null for now, fix later
// defaultConstructor
if (defaultCtor)
dtxoff(&dt, toSymbol(defaultCtor), 0, TYnptr);
else
dtsize_t(&dt, 0);
// xgetRTInfo
if (getRTInfo)
getRTInfo->toDt(&dt);
else if (flags & ClassFlags::noPointers)
dtsize_t(&dt, 0);
else
dtsize_t(&dt, 1);
//dtxoff(&dt, toSymbol(type->vtinfo), 0, TYnptr); // typeinfo
//////////////////////////////////////////////
// Put out (*vtblInterfaces)[]. Must immediately follow csym, because
// of the fixup (*)
offset += vtblInterfaces->dim * (4 * Target::ptrsize);
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{ BaseClass *b = (*vtblInterfaces)[i];
ClassDeclaration *id = b->base;
/* The layout is:
* struct Interface
* {
* ClassInfo *interface;
* void *[] vtbl;
* size_t offset;
* }
*/
// Fill in vtbl[]
b->fillVtbl(this, &b->vtbl, 1);
dtxoff(&dt, toSymbol(id), 0, TYnptr); // ClassInfo
// vtbl[]
dtsize_t(&dt, id->vtbl.dim);
dtxoff(&dt, csym, offset, TYnptr);
dtsize_t(&dt, b->offset); // this offset
offset += id->vtbl.dim * Target::ptrsize;
}
// Put out the (*vtblInterfaces)[].vtbl[]
// This must be mirrored with ClassDeclaration::baseVtblOffset()
//printf("putting out %d interface vtbl[]s for '%s'\n", vtblInterfaces->dim, toChars());
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{ BaseClass *b = (*vtblInterfaces)[i];
ClassDeclaration *id = b->base;
//printf(" interface[%d] is '%s'\n", i, id->toChars());
size_t j = 0;
if (id->vtblOffset())
{
// First entry is ClassInfo reference
//dtxoff(&dt, toSymbol(id), 0, TYnptr);
// First entry is struct Interface reference
dtxoff(&dt, csym, classinfo_size + i * (4 * Target::ptrsize), TYnptr);
j = 1;
}
assert(id->vtbl.dim == b->vtbl.dim);
for (; j < id->vtbl.dim; j++)
{
assert(j < b->vtbl.dim);
#if 0
RootObject *o = b->vtbl[j];
if (o)
{
printf("o = %p\n", o);
assert(o->dyncast() == DYNCAST_DSYMBOL);
Dsymbol *s = (Dsymbol *)o;
printf("s->kind() = '%s'\n", s->kind());
}
#endif
FuncDeclaration *fd = b->vtbl[j];
if (fd)
dtxoff(&dt, fd->toThunkSymbol(b->offset), 0, TYnptr);
else
dtsize_t(&dt, 0);
}
}
// Put out the overriding interface vtbl[]s.
// This must be mirrored with ClassDeclaration::baseVtblOffset()
//printf("putting out overriding interface vtbl[]s for '%s' at offset x%x\n", toChars(), offset);
ClassDeclaration *cd;
FuncDeclarations bvtbl;
for (cd = this->baseClass; cd; cd = cd->baseClass)
{
for (size_t k = 0; k < cd->vtblInterfaces->dim; k++)
{ BaseClass *bs = (*cd->vtblInterfaces)[k];
if (bs->fillVtbl(this, &bvtbl, 0))
{
//printf("\toverriding vtbl[] for %s\n", bs->base->toChars());
ClassDeclaration *id = bs->base;
size_t j = 0;
if (id->vtblOffset())
{
// First entry is ClassInfo reference
//dtxoff(&dt, toSymbol(id), 0, TYnptr);
// First entry is struct Interface reference
dtxoff(&dt, toSymbol(cd), classinfo_size + k * (4 * Target::ptrsize), TYnptr);
j = 1;
}
for (; j < id->vtbl.dim; j++)
{
FuncDeclaration *fd;
assert(j < bvtbl.dim);
fd = bvtbl[j];
if (fd)
dtxoff(&dt, fd->toThunkSymbol(bs->offset), 0, TYnptr);
else
dtsize_t(&dt, 0);
}
}
}
}
csym->Sdt = dt;
// ClassInfo cannot be const data, because we use the monitor on it
outdata(csym);
if (isExport())
objmod->export_symbol(csym,0);
//////////////////////////////////////////////
// Put out the vtbl[]
//printf("putting out %s.vtbl[]\n", toChars());
dt = NULL;
if (vtblOffset())
dtxoff(&dt, csym, 0, TYnptr); // first entry is ClassInfo reference
for (size_t i = vtblOffset(); i < vtbl.dim; i++)
{
FuncDeclaration *fd = vtbl[i]->isFuncDeclaration();
//printf("\tvtbl[%d] = %p\n", i, fd);
if (fd && (fd->fbody || !isAbstract()))
{
// Ensure function has a return value (Bugzilla 4869)
fd->functionSemantic();
Symbol *s = toSymbol(fd);
if (isFuncHidden(fd))
{ /* fd is hidden from the view of this class.
* If fd overlaps with any function in the vtbl[], then
* issue 'hidden' error.
*/
for (size_t j = 1; j < vtbl.dim; j++)
{ if (j == i)
continue;
FuncDeclaration *fd2 = vtbl[j]->isFuncDeclaration();
if (!fd2->ident->equals(fd->ident))
continue;
if (fd->leastAsSpecialized(fd2) || fd2->leastAsSpecialized(fd))
{
TypeFunction *tf = (TypeFunction *)fd->type;
if (tf->ty == Tfunction)
deprecation("use of %s%s hidden by %s is deprecated; use 'alias %s = %s.%s;' to introduce base class overload set",
fd->toPrettyChars(),
parametersTypeToChars(tf->parameters, tf->varargs),
toChars(),
fd->toChars(),
fd->parent->toChars(),
fd->toChars());
else
deprecation("use of %s hidden by %s is deprecated", fd->toPrettyChars(), toChars());
s = rtlsym[RTLSYM_DHIDDENFUNC];
break;
}
}
}
dtxoff(&dt, s, 0, TYnptr);
}
else
dtsize_t(&dt, 0);
}
vtblsym->Sdt = dt;
vtblsym->Sclass = scclass;
vtblsym->Sfl = FLdata;
out_readonly(vtblsym);
outdata(vtblsym);
if (isExport())
objmod->export_symbol(vtblsym,0);
}
/******************************************
* Get offset of base class's vtbl[] initializer from start of csym.
* Returns ~0 if not this csym.
*/
unsigned ClassDeclaration::baseVtblOffset(BaseClass *bc)
{
unsigned csymoffset;
//printf("ClassDeclaration::baseVtblOffset('%s', bc = %p)\n", toChars(), bc);
csymoffset = global.params.isLP64 ? CLASSINFO_SIZE_64 : CLASSINFO_SIZE; // must be ClassInfo.size
csymoffset += vtblInterfaces->dim * (4 * Target::ptrsize);
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{
BaseClass *b = (*vtblInterfaces)[i];
if (b == bc)
return csymoffset;
csymoffset += b->base->vtbl.dim * Target::ptrsize;
}
// Put out the overriding interface vtbl[]s.
// This must be mirrored with ClassDeclaration::baseVtblOffset()
//printf("putting out overriding interface vtbl[]s for '%s' at offset x%x\n", toChars(), offset);
ClassDeclaration *cd;
FuncDeclarations bvtbl;
for (cd = this->baseClass; cd; cd = cd->baseClass)
{
for (size_t k = 0; k < cd->vtblInterfaces->dim; k++)
{ BaseClass *bs = (*cd->vtblInterfaces)[k];
if (bs->fillVtbl(this, NULL, 0))
{
if (bc == bs)
{ //printf("\tcsymoffset = x%x\n", csymoffset);
return csymoffset;
}
csymoffset += bs->base->vtbl.dim * Target::ptrsize;
}
}
}
return ~0;
}
/* ================================================================== */
void InterfaceDeclaration::toObjFile(bool multiobj)
{
enum_SC scclass;
//printf("InterfaceDeclaration::toObjFile('%s')\n", toChars());
if (type->ty == Terror)
{ error("had semantic errors when compiling");
return;
}
if (!members)
return;
if (global.params.symdebug)
toDebug(this);
scclass = SCglobal;
if (isInstantiated())
scclass = SCcomdat;
// Put out the members
for (size_t i = 0; i < members->dim; i++)
{ Dsymbol *member = (*members)[i];
member->toObjFile(0);
}
// Generate C symbols
toSymbol(this);
//////////////////////////////////////////////
// Put out the TypeInfo
type->genTypeInfo(NULL);
type->vtinfo->toObjFile(multiobj);
//////////////////////////////////////////////
// Put out the ClassInfo
csym->Sclass = scclass;
csym->Sfl = FLdata;
/* The layout is:
{
void **vptr;
monitor_t monitor;
byte[] initializer; // static initialization data
char[] name; // class name
void *[] vtbl;
Interface[] interfaces;
Object *base; // base class
void *destructor;
void *invariant; // class invariant
uint flags;
void *deallocator;
OffsetTypeInfo[] offTi;
void *defaultConstructor;
//const(MemberInfo[]) function(string) xgetMembers; // module getMembers() function
void* xgetRTInfo;
//TypeInfo typeinfo;
}
*/
dt_t *dt = NULL;
if (Type::typeinfoclass)
dtxoff(&dt, Type::typeinfoclass->toVtblSymbol(), 0, TYnptr); // vtbl for ClassInfo
else
dtsize_t(&dt, 0); // BUG: should be an assert()
dtsize_t(&dt, 0); // monitor
// initializer[]
dtsize_t(&dt, 0); // size
dtsize_t(&dt, 0); // initializer
// name[]
const char *name = toPrettyChars();
size_t namelen = strlen(name);
dtsize_t(&dt, namelen);
dtabytes(&dt, TYnptr, 0, namelen + 1, name);
// vtbl[]
dtsize_t(&dt, 0);
dtsize_t(&dt, 0);
// (*vtblInterfaces)[]
unsigned offset;
dtsize_t(&dt, vtblInterfaces->dim);
if (vtblInterfaces->dim)
{
offset = global.params.isLP64 ? CLASSINFO_SIZE_64 : CLASSINFO_SIZE; // must be ClassInfo.size
if (Type::typeinfoclass)
{
if (Type::typeinfoclass->structsize != offset)
{
error("mismatch between dmd and object.d or object.di found. Check installation and import paths with -v compiler switch.");
fatal();
}
}
dtxoff(&dt, csym, offset, TYnptr); // (*)
}
else
{ offset = 0;
dtsize_t(&dt, 0);
}
// base
assert(!baseClass);
dtsize_t(&dt, 0);
// dtor
dtsize_t(&dt, 0);
// invariant
dtsize_t(&dt, 0);
// flags
ClassFlags::Type flags = ClassFlags::hasOffTi | ClassFlags::hasTypeInfo;
if (isCOMinterface()) flags |= ClassFlags::isCOMclass;
dtsize_t(&dt, flags);
// deallocator
dtsize_t(&dt, 0);
// offTi[]
dtsize_t(&dt, 0);
dtsize_t(&dt, 0); // null for now, fix later
// defaultConstructor
dtsize_t(&dt, 0);
// xgetMembers
//dtsize_t(&dt, 0);
// xgetRTInfo
// xgetRTInfo
if (getRTInfo)
getRTInfo->toDt(&dt);
else
dtsize_t(&dt, 0); // no pointers
//dtxoff(&dt, toSymbol(type->vtinfo), 0, TYnptr); // typeinfo
//////////////////////////////////////////////
// Put out (*vtblInterfaces)[]. Must immediately follow csym, because
// of the fixup (*)
offset += vtblInterfaces->dim * (4 * Target::ptrsize);
for (size_t i = 0; i < vtblInterfaces->dim; i++)
{ BaseClass *b = (*vtblInterfaces)[i];
ClassDeclaration *id = b->base;
// ClassInfo
dtxoff(&dt, toSymbol(id), 0, TYnptr);
// vtbl[]
dtsize_t(&dt, 0);
dtsize_t(&dt, 0);
// this offset
dtsize_t(&dt, b->offset);
}
csym->Sdt = dt;
out_readonly(csym);
outdata(csym);
if (isExport())
objmod->export_symbol(csym,0);
}
/* ================================================================== */
void StructDeclaration::toObjFile(bool multiobj)
{
//printf("StructDeclaration::toObjFile('%s')\n", toChars());
if (type->ty == Terror)
{
error("had semantic errors when compiling");
return;
}
if (multiobj && !hasStaticCtorOrDtor())
{
obj_append(this);
return;
}
// Anonymous structs/unions only exist as part of others,
// do not output forward referenced structs's
if (!isAnonymous() && members)
{
if (global.params.symdebug)
toDebug(this);
type->genTypeInfo(NULL);
if (1)
{
// Generate static initializer
toInitializer();
if (isInstantiated())
{
sinit->Sclass = SCcomdat;
}
else
{
sinit->Sclass = SCglobal;
}
sinit->Sfl = FLdata;
StructDeclaration_toDt(this, &sinit->Sdt);
dt_optimize(sinit->Sdt);
out_readonly(sinit); // put in read-only segment
outdata(sinit);
}
// Put out the members
for (size_t i = 0; i < members->dim; i++)
{
Dsymbol *member = (*members)[i];
/* There might be static ctors in the members, and they cannot
* be put in separate obj files.
*/
member->toObjFile(multiobj);
}
if (xeq && xeq != xerreq)
xeq->toObjFile(multiobj);
if (xcmp && xcmp != xerrcmp)
xcmp->toObjFile(multiobj);
if (xhash)
xhash->toObjFile(multiobj);
}
}
/* ================================================================== */
void VarDeclaration::toObjFile(bool multiobj)
{
Symbol *s;
unsigned sz;
Dsymbol *parent;
//printf("VarDeclaration::toObjFile(%p '%s' type=%s) protection %d\n", this, toChars(), type->toChars(), protection);
//printf("\talign = %d\n", alignment);
if (type->ty == Terror)
{ error("had semantic errors when compiling");
return;
}
if (aliassym)
{ toAlias()->toObjFile(0);
return;
}
// Do not store variables we cannot take the address of
if (!canTakeAddressOf())
{
return;
}
if (isDataseg() && !(storage_class & STCextern))
{
s = toSymbol(this);
sz = type->size();
parent = this->toParent();
{
s->Sclass = SCglobal;
do
{
/* Global template data members need to be in comdat's
* in case multiple .obj files instantiate the same
* template with the same types.
*/
if (parent->isTemplateInstance() && !parent->isTemplateMixin())
{
s->Sclass = SCcomdat;
break;
}
parent = parent->parent;
} while (parent);
}
s->Sfl = FLdata;
if (init)
{
s->Sdt = Initializer_toDt(init);
// Look for static array that is block initialized
Type *tb;
ExpInitializer *ie = init->isExpInitializer();
tb = type->toBasetype();
if (tb->ty == Tsarray && ie &&
!tb->nextOf()->equals(ie->exp->type->toBasetype()->nextOf()) &&
ie->exp->implicitConvTo(tb->nextOf())
)
{
size_t dim = ((TypeSArray *)tb)->dim->toInteger();
// Duplicate Sdt 'dim-1' times, as we already have the first one
dt_t **pdt = &s->Sdt;
while (--dim > 0)
{
pdt = ie->exp->toDt(pdt);
}
}
}
else if (storage_class & STCextern)
{
s->Sclass = SCextern;
s->Sfl = FLextern;
s->Sdt = NULL;
// BUG: if isExport(), shouldn't we make it dllimport?
return;
}
else
{
Type_toDt(type, &s->Sdt);
}
dt_optimize(s->Sdt);
// See if we can convert a comdat to a comdef,
// which saves on exe file space.
if (s->Sclass == SCcomdat &&
s->Sdt &&
dtallzeros(s->Sdt) &&
!isThreadlocal())
{
s->Sclass = SCglobal;
dt2common(&s->Sdt);
}
if (!sz && type->toBasetype()->ty != Tsarray)
assert(0); // this shouldn't be possible