forked from OSchip/llvm-project
This patch builds the meta-class object for each
implemented class in objc2's nonfrigile abi. llvm-svn: 62929
This commit is contained in:
Fariborz Jahanian
parent
8dff017695
commit
9e3ad5220d
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@ -344,6 +344,10 @@ protected:
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llvm::Constant *GetPropertyTypeString(const ObjCPropertyDecl *PD,
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const Decl *Container);
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/// GetClassName - Return a unique constant for the given selector's
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/// name. The return value has type char *.
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llvm::Constant *GetClassName(IdentifierInfo *Ident);
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public:
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CGObjCCommonMac(CodeGen::CodeGenModule &cgm) : CGM(cgm)
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{ }
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@ -475,10 +479,6 @@ private:
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/// defined. The return value has type ProtocolPtrTy.
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llvm::Constant *GetProtocolRef(const ObjCProtocolDecl *PD);
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/// GetClassName - Return a unique constant for the given selector's
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/// name. The return value has type char *.
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llvm::Constant *GetClassName(IdentifierInfo *Ident);
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public:
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CGObjCMac(CodeGen::CodeGenModule &cgm);
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@ -547,6 +547,16 @@ private:
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/// processing a translation unit.
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void FinishNonFragileABIModule();
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llvm::GlobalVariable * BuildClassRoTInitializer(unsigned flags,
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unsigned InstanceStart,
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unsigned InstanceSize,
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const ObjCImplementationDecl *ID);
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void BuildClassMetaData(std::string &ClassName,
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llvm::Constant *IsAGV, llvm::Constant *SuperClassGV,
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llvm::Constant *ClassRoGV);
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public:
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CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm);
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// FIXME. All stubs for now!
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@ -2207,7 +2217,7 @@ llvm::Value *CGObjCMac::EmitSelector(CGBuilderTy &Builder, Selector Sel) {
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return Builder.CreateLoad(Entry, false, "tmp");
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}
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llvm::Constant *CGObjCMac::GetClassName(IdentifierInfo *Ident) {
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llvm::Constant *CGObjCCommonMac::GetClassName(IdentifierInfo *Ident) {
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llvm::GlobalVariable *&Entry = ClassNames[Ident];
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if (!Entry) {
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@ -2971,12 +2981,14 @@ ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModul
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// uint32 count;
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// struct _iver_t list[count];
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// }
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IvarListnfABIPtrTy = llvm::StructType::get(IntTy,
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IntTy,
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llvm::ArrayType::get(
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IvarnfABITy, 0),
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NULL);
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CGM.getModule().addTypeName("struct._ivar_list_t", IvarListnfABIPtrTy);
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IvarListnfABITy = llvm::StructType::get(IntTy,
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IntTy,
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llvm::ArrayType::get(
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IvarnfABITy, 0),
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NULL);
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CGM.getModule().addTypeName("struct._ivar_list_t", IvarListnfABITy);
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IvarListnfABIPtrTy = llvm::PointerType::getUnqual(IvarListnfABITy);
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// struct _class_ro_t {
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// uint32_t const flags;
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@ -3083,6 +3095,101 @@ void CGObjCNonFragileABIMac::FinishNonFragileABIModule() {
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}
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// Metadata flags
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enum MetaDataDlags {
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CLS = 0x0,
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CLS_META = 0x1,
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CLS_ROOT = 0x2,
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CLS_HIDDEN = 0x10,
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CLS_EXCEPTION = 0x20
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};
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/// BuildClassRoTInitializer - generate meta-data for:
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/// struct _class_ro_t {
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/// uint32_t const flags;
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/// uint32_t const instanceStart;
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/// uint32_t const instanceSize;
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/// uint32_t const reserved; // only when building for 64bit targets
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/// const uint8_t * const ivarLayout;
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/// const char *const name;
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/// const struct _method_list_t * const baseMethods;
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/// const struct _objc_protocol_list *const baseProtocols;
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/// const struct _ivar_list_t *const ivars;
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/// const uint8_t * const weakIvarLayout;
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/// const struct _prop_list_t * const properties;
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/// }
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///
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llvm::GlobalVariable * CGObjCNonFragileABIMac::BuildClassRoTInitializer(
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unsigned flags,
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unsigned InstanceStart,
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unsigned InstanceSize,
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const ObjCImplementationDecl *ID) {
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std::string ClassName = ID->getNameAsString();
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std::vector<llvm::Constant*> Values(10); // 11 for 64bit targets!
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Values[ 0] = llvm::ConstantInt::get(ObjCTypes.IntTy, flags);
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Values[ 1] = llvm::ConstantInt::get(ObjCTypes.IntTy, InstanceStart);
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Values[ 2] = llvm::ConstantInt::get(ObjCTypes.IntTy, InstanceSize);
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// FIXME. For 64bit targets add 0 here.
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Values[ 3] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
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Values[ 4] = GetClassName(ID->getIdentifier());
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Values[ 5] = llvm::Constant::getNullValue(ObjCTypes.MethodListnfABIPtrTy);
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Values[ 6] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListnfABIPtrTy);
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Values[ 7] = llvm::Constant::getNullValue(ObjCTypes.IvarListnfABIPtrTy);
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Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
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Values[ 9] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
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llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassRonfABITy,
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Values);
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llvm::GlobalVariable *CLASS_RO_GV =
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new llvm::GlobalVariable(ObjCTypes.ClassRonfABITy, false,
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llvm::GlobalValue::InternalLinkage,
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Init,
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(flags & CLS_META) ?
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std::string("\01l_OBJC_METACLASS_RO_$_")+ClassName :
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std::string("\01l_OBJC_CLASS_RO_$_")+ClassName,
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&CGM.getModule());
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CLASS_RO_GV->setSection(".section __DATA,__data,regular,no_dead_strip");
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UsedGlobals.push_back(CLASS_RO_GV);
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return CLASS_RO_GV;
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}
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/// BuildClassMetaData - This routine defines that to-level meta-data
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/// for the given ClassName for:
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/// struct _class_t {
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/// struct _class_t *isa;
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/// struct _class_t * const superclass;
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/// void *cache;
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/// IMP *vtable;
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/// struct class_ro_t *ro;
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/// }
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///
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void CGObjCNonFragileABIMac::BuildClassMetaData(std::string &ClassName,
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llvm::Constant *IsAGV,
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llvm::Constant *SuperClassGV,
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llvm::Constant *ClassRoGV) {
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std::vector<llvm::Constant*> Values(5);
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Values[0] = IsAGV;
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Values[1] = SuperClassGV;
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Values[2] = ObjCEmptyCacheVar; // &ObjCEmptyCacheVar
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Values[3] = ObjCEmptyVtableVar; // &ObjCEmptyVtableVar
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Values[4] = ClassRoGV; // &CLASS_RO_GV
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llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassnfABITy,
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Values);
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llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(ClassName);
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if (GV)
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GV->setInitializer(Init);
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else
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GV =
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new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
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llvm::GlobalValue::ExternalLinkage,
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Init,
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ClassName,
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&CGM.getModule());
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GV->setSection(".section __DATA,__data,regular,no_dead_strip");
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UsedGlobals.push_back(GV);
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// FIXME! why?
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GV->setAlignment(32);
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}
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void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
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std::string ClassName = ID->getNameAsString();
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if (!ObjCEmptyCacheVar) {
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@ -3105,70 +3212,59 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
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&CGM.getModule());
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UsedGlobals.push_back(ObjCEmptyVtableVar);
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}
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uint32_t InstanceStart =
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CGM.getTargetData().getTypePaddedSize(ObjCTypes.ClassnfABITy);
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uint32_t InstanceSize = InstanceStart;
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uint32_t flags = CLS_META;
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std::string ObjCMetaClassName("\01_OBJC_METACLASS_$_");
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std::string ObjCClassName("\01_OBJC_CLASS_$_");
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std::vector<llvm::Constant*> Values(11); // 11 for 64bit targets!
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// Generate following meta-data:
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// struct _class_ro_t {
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// uint32_t const flags;
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// uint32_t const instanceStart;
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// uint32_t const instanceSize;
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// uint32_t const reserved; // only when building for 64bit targets
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// const uint8_t * const ivarLayout;
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// const char *const name;
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// const struct _method_list_t * const baseMethods;
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// const struct _objc_protocol_list *const baseProtocols;
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// const struct _ivar_list_t *const ivars;
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// const uint8_t * const weakIvarLayout;
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// const struct _prop_list_t * const properties;
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// }
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Values[ 0] = llvm::ConstantInt::get(ObjCTypes.IntTy, 0);
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Values[ 1] = llvm::ConstantInt::get(ObjCTypes.IntTy, 0);
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Values[ 2] = llvm::ConstantInt::get(ObjCTypes.IntTy, 0);
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Values[ 3] = llvm::ConstantInt::get(ObjCTypes.IntTy, 0);
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// FIXME. For 64bit targets add 0 here.
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Values[ 4] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
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Values[ 5] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
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Values[ 6] = llvm::Constant::getNullValue(ObjCTypes.MethodListnfABIPtrTy);
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Values[ 7] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListnfABIPtrTy);
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Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.IvarListnfABIPtrTy);
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Values[ 9] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
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Values[10] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
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llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassRonfABITy,
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Values);
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llvm::GlobalVariable *CLASS_RO_GV =
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new llvm::GlobalVariable(ObjCTypes.ClassRonfABITy, false,
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llvm::GlobalValue::InternalLinkage,
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Init,
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std::string("\01l_OBJC_CLASS_RO_$_")+ClassName,
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&CGM.getModule());
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CLASS_RO_GV->setSection(".section __DATA,__data,regular,no_dead_strip");
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UsedGlobals.push_back(CLASS_RO_GV);
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llvm::GlobalVariable *SuperClassGV, *IsAGV;
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// Generate following meta-data:
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// struct _class_t {
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// struct _class_t *isa;
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// struct _class_t * const superclass;
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// void *cache;
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// IMP *vtable;
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// struct class_ro_t *ro;
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// }
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Values.resize(5);
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Values[0] = llvm::Constant::getNullValue(ObjCTypes.ClassnfABIPtrTy);
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Values[1] = llvm::Constant::getNullValue(ObjCTypes.ClassnfABIPtrTy);
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Values[2] = ObjCEmptyCacheVar; // &ObjCEmptyCacheVar
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Values[3] = ObjCEmptyVtableVar; // &ObjCEmptyVtableVar
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Values[4] = CLASS_RO_GV; // &CLASS_RO_GV
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Init = llvm::ConstantStruct::get(ObjCTypes.ClassnfABITy, Values);
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llvm::GlobalVariable *GV =
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new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
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llvm::GlobalValue::ExternalLinkage,
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Init,
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std::string("\01_OBJC_CLASS_$_")+ClassName,
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&CGM.getModule());
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GV->setSection(".section __DATA,__data,regular,no_dead_strip");
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UsedGlobals.push_back(GV);
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// FIXME! why?
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GV->setAlignment(32);
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if (ID->getClassInterface() && !ID->getClassInterface()->getSuperClass()) {
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// class is root
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flags |= CLS_ROOT;
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std::string SuperClassName = ObjCClassName + ClassName;
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SuperClassGV = CGM.getModule().getGlobalVariable(SuperClassName);
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if (!SuperClassGV)
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SuperClassGV =
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new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
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llvm::GlobalValue::ExternalLinkage,
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0,
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SuperClassName,
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&CGM.getModule());
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UsedGlobals.push_back(SuperClassGV);
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std::string IsAClassName = ObjCMetaClassName + ClassName;
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IsAGV = CGM.getModule().getGlobalVariable(IsAClassName);
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if (!IsAGV)
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IsAGV =
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new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
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llvm::GlobalValue::ExternalLinkage,
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0,
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IsAClassName,
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&CGM.getModule());
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UsedGlobals.push_back(IsAGV);
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} else {
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// Not a root.
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std::string RootClassName =
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ID->getClassInterface()->getSuperClass()->getNameAsString();
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std::string SuperClassName = ObjCMetaClassName + RootClassName;
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SuperClassGV = CGM.getModule().getGlobalVariable(SuperClassName);
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if (!SuperClassGV)
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SuperClassGV =
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new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
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llvm::GlobalValue::ExternalLinkage,
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0,
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SuperClassName,
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&CGM.getModule());
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UsedGlobals.push_back(SuperClassGV);
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IsAGV = SuperClassGV;
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}
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llvm::GlobalVariable *CLASS_RO_GV = BuildClassRoTInitializer(flags,
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InstanceStart,
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InstanceSize,ID);
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std::string MetaClassName = ObjCMetaClassName + ClassName;
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BuildClassMetaData(MetaClassName, IsAGV, SuperClassGV, CLASS_RO_GV);
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}
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/* *** */
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