forked from OSchip/llvm-project
6144 lines
239 KiB
C++
6144 lines
239 KiB
C++
//===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This provides Objective-C code generation targeting the Apple runtime.
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//
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//===----------------------------------------------------------------------===//
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#include "CGObjCRuntime.h"
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#include "CGRecordLayout.h"
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#include "CodeGenModule.h"
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#include "CodeGenFunction.h"
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#include "CGBlocks.h"
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#include "CGCleanup.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/RecordLayout.h"
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#include "clang/AST/StmtObjC.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Frontend/CodeGenOptions.h"
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#include "llvm/InlineAsm.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetData.h"
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#include <cstdio>
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using namespace clang;
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using namespace CodeGen;
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namespace {
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typedef std::vector<llvm::Constant*> ConstantVector;
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// FIXME: We should find a nicer way to make the labels for metadata, string
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// concatenation is lame.
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class ObjCCommonTypesHelper {
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protected:
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llvm::LLVMContext &VMContext;
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private:
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// The types of these functions don't really matter because we
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// should always bitcast before calling them.
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/// id objc_msgSend (id, SEL, ...)
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///
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/// The default messenger, used for sends whose ABI is unchanged from
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/// the all-integer/pointer case.
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llvm::Constant *getMessageSendFn() const {
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// Add the non-lazy-bind attribute, since objc_msgSend is likely to
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// be called a lot.
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llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
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params, true),
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"objc_msgSend",
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llvm::Attribute::NonLazyBind);
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}
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/// void objc_msgSend_stret (id, SEL, ...)
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///
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/// The messenger used when the return value is an aggregate returned
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/// by indirect reference in the first argument, and therefore the
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/// self and selector parameters are shifted over by one.
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llvm::Constant *getMessageSendStretFn() const {
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llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy,
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params, true),
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"objc_msgSend_stret");
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}
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/// [double | long double] objc_msgSend_fpret(id self, SEL op, ...)
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///
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/// The messenger used when the return value is returned on the x87
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/// floating-point stack; without a special entrypoint, the nil case
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/// would be unbalanced.
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llvm::Constant *getMessageSendFpretFn() const {
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llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(
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llvm::Type::getDoubleTy(VMContext),
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params, true),
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"objc_msgSend_fpret");
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}
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/// _Complex long double objc_msgSend_fp2ret(id self, SEL op, ...)
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///
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/// The messenger used when the return value is returned in two values on the
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/// x87 floating point stack; without a special entrypoint, the nil case
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/// would be unbalanced. Only used on 64-bit X86.
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llvm::Constant *getMessageSendFp2retFn() const {
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llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
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llvm::Type *longDoubleType = llvm::Type::getX86_FP80Ty(VMContext);
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llvm::Type *resultType =
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llvm::StructType::get(longDoubleType, longDoubleType, NULL);
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(resultType,
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params, true),
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"objc_msgSend_fp2ret");
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}
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/// id objc_msgSendSuper(struct objc_super *super, SEL op, ...)
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///
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/// The messenger used for super calls, which have different dispatch
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/// semantics. The class passed is the superclass of the current
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/// class.
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llvm::Constant *getMessageSendSuperFn() const {
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llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
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params, true),
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"objc_msgSendSuper");
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}
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/// id objc_msgSendSuper2(struct objc_super *super, SEL op, ...)
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///
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/// A slightly different messenger used for super calls. The class
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/// passed is the current class.
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llvm::Constant *getMessageSendSuperFn2() const {
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llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
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params, true),
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"objc_msgSendSuper2");
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}
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/// void objc_msgSendSuper_stret(void *stretAddr, struct objc_super *super,
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/// SEL op, ...)
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///
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/// The messenger used for super calls which return an aggregate indirectly.
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llvm::Constant *getMessageSendSuperStretFn() const {
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llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(
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llvm::FunctionType::get(CGM.VoidTy, params, true),
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"objc_msgSendSuper_stret");
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}
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/// void objc_msgSendSuper2_stret(void * stretAddr, struct objc_super *super,
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/// SEL op, ...)
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///
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/// objc_msgSendSuper_stret with the super2 semantics.
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llvm::Constant *getMessageSendSuperStretFn2() const {
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llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy };
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return CGM.CreateRuntimeFunction(
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llvm::FunctionType::get(CGM.VoidTy, params, true),
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"objc_msgSendSuper2_stret");
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}
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llvm::Constant *getMessageSendSuperFpretFn() const {
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// There is no objc_msgSendSuper_fpret? How can that work?
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return getMessageSendSuperFn();
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}
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llvm::Constant *getMessageSendSuperFpretFn2() const {
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// There is no objc_msgSendSuper_fpret? How can that work?
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return getMessageSendSuperFn2();
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}
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protected:
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CodeGen::CodeGenModule &CGM;
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public:
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llvm::Type *ShortTy, *IntTy, *LongTy, *LongLongTy;
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llvm::Type *Int8PtrTy;
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/// ObjectPtrTy - LLVM type for object handles (typeof(id))
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llvm::Type *ObjectPtrTy;
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/// PtrObjectPtrTy - LLVM type for id *
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llvm::Type *PtrObjectPtrTy;
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/// SelectorPtrTy - LLVM type for selector handles (typeof(SEL))
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llvm::Type *SelectorPtrTy;
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/// ProtocolPtrTy - LLVM type for external protocol handles
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/// (typeof(Protocol))
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llvm::Type *ExternalProtocolPtrTy;
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// SuperCTy - clang type for struct objc_super.
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QualType SuperCTy;
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// SuperPtrCTy - clang type for struct objc_super *.
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QualType SuperPtrCTy;
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/// SuperTy - LLVM type for struct objc_super.
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llvm::StructType *SuperTy;
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/// SuperPtrTy - LLVM type for struct objc_super *.
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llvm::Type *SuperPtrTy;
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/// PropertyTy - LLVM type for struct objc_property (struct _prop_t
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/// in GCC parlance).
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llvm::StructType *PropertyTy;
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/// PropertyListTy - LLVM type for struct objc_property_list
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/// (_prop_list_t in GCC parlance).
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llvm::StructType *PropertyListTy;
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/// PropertyListPtrTy - LLVM type for struct objc_property_list*.
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llvm::Type *PropertyListPtrTy;
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// MethodTy - LLVM type for struct objc_method.
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llvm::StructType *MethodTy;
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/// CacheTy - LLVM type for struct objc_cache.
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llvm::Type *CacheTy;
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/// CachePtrTy - LLVM type for struct objc_cache *.
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llvm::Type *CachePtrTy;
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llvm::Constant *getGetPropertyFn() {
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CodeGen::CodeGenTypes &Types = CGM.getTypes();
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ASTContext &Ctx = CGM.getContext();
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// id objc_getProperty (id, SEL, ptrdiff_t, bool)
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SmallVector<CanQualType,4> Params;
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CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType());
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CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType());
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Params.push_back(IdType);
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Params.push_back(SelType);
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Params.push_back(Ctx.getPointerDiffType()->getCanonicalTypeUnqualified());
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Params.push_back(Ctx.BoolTy);
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llvm::FunctionType *FTy =
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Types.GetFunctionType(Types.getFunctionInfo(IdType, Params,
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FunctionType::ExtInfo()),
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false);
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return CGM.CreateRuntimeFunction(FTy, "objc_getProperty");
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}
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llvm::Constant *getSetPropertyFn() {
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CodeGen::CodeGenTypes &Types = CGM.getTypes();
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ASTContext &Ctx = CGM.getContext();
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// void objc_setProperty (id, SEL, ptrdiff_t, id, bool, bool)
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SmallVector<CanQualType,6> Params;
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CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType());
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CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType());
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Params.push_back(IdType);
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Params.push_back(SelType);
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Params.push_back(Ctx.getPointerDiffType()->getCanonicalTypeUnqualified());
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Params.push_back(IdType);
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Params.push_back(Ctx.BoolTy);
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Params.push_back(Ctx.BoolTy);
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llvm::FunctionType *FTy =
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Types.GetFunctionType(Types.getFunctionInfo(Ctx.VoidTy, Params,
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FunctionType::ExtInfo()),
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false);
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return CGM.CreateRuntimeFunction(FTy, "objc_setProperty");
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}
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llvm::Constant *getCopyStructFn() {
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CodeGen::CodeGenTypes &Types = CGM.getTypes();
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ASTContext &Ctx = CGM.getContext();
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// void objc_copyStruct (void *, const void *, size_t, bool, bool)
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SmallVector<CanQualType,5> Params;
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Params.push_back(Ctx.VoidPtrTy);
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Params.push_back(Ctx.VoidPtrTy);
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Params.push_back(Ctx.LongTy);
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Params.push_back(Ctx.BoolTy);
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Params.push_back(Ctx.BoolTy);
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llvm::FunctionType *FTy =
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Types.GetFunctionType(Types.getFunctionInfo(Ctx.VoidTy, Params,
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FunctionType::ExtInfo()),
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false);
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return CGM.CreateRuntimeFunction(FTy, "objc_copyStruct");
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}
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llvm::Constant *getEnumerationMutationFn() {
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CodeGen::CodeGenTypes &Types = CGM.getTypes();
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ASTContext &Ctx = CGM.getContext();
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// void objc_enumerationMutation (id)
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SmallVector<CanQualType,1> Params;
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Params.push_back(Ctx.getCanonicalParamType(Ctx.getObjCIdType()));
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llvm::FunctionType *FTy =
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Types.GetFunctionType(Types.getFunctionInfo(Ctx.VoidTy, Params,
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FunctionType::ExtInfo()),
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false);
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return CGM.CreateRuntimeFunction(FTy, "objc_enumerationMutation");
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}
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/// GcReadWeakFn -- LLVM objc_read_weak (id *src) function.
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llvm::Constant *getGcReadWeakFn() {
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// id objc_read_weak (id *)
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llvm::Type *args[] = { ObjectPtrTy->getPointerTo() };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_read_weak");
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}
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/// GcAssignWeakFn -- LLVM objc_assign_weak function.
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llvm::Constant *getGcAssignWeakFn() {
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// id objc_assign_weak (id, id *)
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llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_assign_weak");
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}
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/// GcAssignGlobalFn -- LLVM objc_assign_global function.
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llvm::Constant *getGcAssignGlobalFn() {
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// id objc_assign_global(id, id *)
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llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_assign_global");
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}
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/// GcAssignThreadLocalFn -- LLVM objc_assign_threadlocal function.
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llvm::Constant *getGcAssignThreadLocalFn() {
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// id objc_assign_threadlocal(id src, id * dest)
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llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_assign_threadlocal");
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}
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/// GcAssignIvarFn -- LLVM objc_assign_ivar function.
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llvm::Constant *getGcAssignIvarFn() {
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// id objc_assign_ivar(id, id *, ptrdiff_t)
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llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo(),
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CGM.PtrDiffTy };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_assign_ivar");
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}
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/// GcMemmoveCollectableFn -- LLVM objc_memmove_collectable function.
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llvm::Constant *GcMemmoveCollectableFn() {
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// void *objc_memmove_collectable(void *dst, const void *src, size_t size)
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llvm::Type *args[] = { Int8PtrTy, Int8PtrTy, LongTy };
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llvm::FunctionType *FTy = llvm::FunctionType::get(Int8PtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_memmove_collectable");
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}
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/// GcAssignStrongCastFn -- LLVM objc_assign_strongCast function.
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llvm::Constant *getGcAssignStrongCastFn() {
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// id objc_assign_strongCast(id, id *)
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llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(ObjectPtrTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_assign_strongCast");
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}
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/// ExceptionThrowFn - LLVM objc_exception_throw function.
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llvm::Constant *getExceptionThrowFn() {
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// void objc_exception_throw(id)
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llvm::Type *args[] = { ObjectPtrTy };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(CGM.VoidTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_exception_throw");
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}
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/// ExceptionRethrowFn - LLVM objc_exception_rethrow function.
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llvm::Constant *getExceptionRethrowFn() {
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// void objc_exception_rethrow(void)
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llvm::FunctionType *FTy = llvm::FunctionType::get(CGM.VoidTy, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_exception_rethrow");
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}
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/// SyncEnterFn - LLVM object_sync_enter function.
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llvm::Constant *getSyncEnterFn() {
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// void objc_sync_enter (id)
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llvm::Type *args[] = { ObjectPtrTy };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(CGM.VoidTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_sync_enter");
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}
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/// SyncExitFn - LLVM object_sync_exit function.
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llvm::Constant *getSyncExitFn() {
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// void objc_sync_exit (id)
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llvm::Type *args[] = { ObjectPtrTy };
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llvm::FunctionType *FTy =
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llvm::FunctionType::get(CGM.VoidTy, args, false);
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return CGM.CreateRuntimeFunction(FTy, "objc_sync_exit");
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}
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llvm::Constant *getSendFn(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFn() : getMessageSendFn();
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}
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llvm::Constant *getSendFn2(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFn2() : getMessageSendFn();
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}
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llvm::Constant *getSendStretFn(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperStretFn() : getMessageSendStretFn();
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}
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llvm::Constant *getSendStretFn2(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperStretFn2() : getMessageSendStretFn();
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}
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llvm::Constant *getSendFpretFn(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFpretFn() : getMessageSendFpretFn();
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}
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llvm::Constant *getSendFpretFn2(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFpretFn2() : getMessageSendFpretFn();
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}
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llvm::Constant *getSendFp2retFn(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFn() : getMessageSendFp2retFn();
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}
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llvm::Constant *getSendFp2RetFn2(bool IsSuper) const {
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return IsSuper ? getMessageSendSuperFn2() : getMessageSendFp2retFn();
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}
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ObjCCommonTypesHelper(CodeGen::CodeGenModule &cgm);
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~ObjCCommonTypesHelper(){}
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};
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/// ObjCTypesHelper - Helper class that encapsulates lazy
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/// construction of varies types used during ObjC generation.
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class ObjCTypesHelper : public ObjCCommonTypesHelper {
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public:
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/// SymtabTy - LLVM type for struct objc_symtab.
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llvm::StructType *SymtabTy;
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/// SymtabPtrTy - LLVM type for struct objc_symtab *.
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llvm::Type *SymtabPtrTy;
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/// ModuleTy - LLVM type for struct objc_module.
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llvm::StructType *ModuleTy;
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/// ProtocolTy - LLVM type for struct objc_protocol.
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llvm::StructType *ProtocolTy;
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/// ProtocolPtrTy - LLVM type for struct objc_protocol *.
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llvm::Type *ProtocolPtrTy;
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/// ProtocolExtensionTy - LLVM type for struct
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/// objc_protocol_extension.
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llvm::StructType *ProtocolExtensionTy;
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/// ProtocolExtensionTy - LLVM type for struct
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/// objc_protocol_extension *.
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llvm::Type *ProtocolExtensionPtrTy;
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/// MethodDescriptionTy - LLVM type for struct
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/// objc_method_description.
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llvm::StructType *MethodDescriptionTy;
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/// MethodDescriptionListTy - LLVM type for struct
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/// objc_method_description_list.
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llvm::StructType *MethodDescriptionListTy;
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/// MethodDescriptionListPtrTy - LLVM type for struct
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/// objc_method_description_list *.
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llvm::Type *MethodDescriptionListPtrTy;
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/// ProtocolListTy - LLVM type for struct objc_property_list.
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llvm::StructType *ProtocolListTy;
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/// ProtocolListPtrTy - LLVM type for struct objc_property_list*.
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llvm::Type *ProtocolListPtrTy;
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|
/// CategoryTy - LLVM type for struct objc_category.
|
|
llvm::StructType *CategoryTy;
|
|
/// ClassTy - LLVM type for struct objc_class.
|
|
llvm::StructType *ClassTy;
|
|
/// ClassPtrTy - LLVM type for struct objc_class *.
|
|
llvm::Type *ClassPtrTy;
|
|
/// ClassExtensionTy - LLVM type for struct objc_class_ext.
|
|
llvm::StructType *ClassExtensionTy;
|
|
/// ClassExtensionPtrTy - LLVM type for struct objc_class_ext *.
|
|
llvm::Type *ClassExtensionPtrTy;
|
|
// IvarTy - LLVM type for struct objc_ivar.
|
|
llvm::StructType *IvarTy;
|
|
/// IvarListTy - LLVM type for struct objc_ivar_list.
|
|
llvm::Type *IvarListTy;
|
|
/// IvarListPtrTy - LLVM type for struct objc_ivar_list *.
|
|
llvm::Type *IvarListPtrTy;
|
|
/// MethodListTy - LLVM type for struct objc_method_list.
|
|
llvm::Type *MethodListTy;
|
|
/// MethodListPtrTy - LLVM type for struct objc_method_list *.
|
|
llvm::Type *MethodListPtrTy;
|
|
|
|
/// ExceptionDataTy - LLVM type for struct _objc_exception_data.
|
|
llvm::Type *ExceptionDataTy;
|
|
|
|
/// ExceptionTryEnterFn - LLVM objc_exception_try_enter function.
|
|
llvm::Constant *getExceptionTryEnterFn() {
|
|
llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
|
|
return CGM.CreateRuntimeFunction(
|
|
llvm::FunctionType::get(CGM.VoidTy, params, false),
|
|
"objc_exception_try_enter");
|
|
}
|
|
|
|
/// ExceptionTryExitFn - LLVM objc_exception_try_exit function.
|
|
llvm::Constant *getExceptionTryExitFn() {
|
|
llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
|
|
return CGM.CreateRuntimeFunction(
|
|
llvm::FunctionType::get(CGM.VoidTy, params, false),
|
|
"objc_exception_try_exit");
|
|
}
|
|
|
|
/// ExceptionExtractFn - LLVM objc_exception_extract function.
|
|
llvm::Constant *getExceptionExtractFn() {
|
|
llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, false),
|
|
"objc_exception_extract");
|
|
}
|
|
|
|
/// ExceptionMatchFn - LLVM objc_exception_match function.
|
|
llvm::Constant *getExceptionMatchFn() {
|
|
llvm::Type *params[] = { ClassPtrTy, ObjectPtrTy };
|
|
return CGM.CreateRuntimeFunction(
|
|
llvm::FunctionType::get(CGM.Int32Ty, params, false),
|
|
"objc_exception_match");
|
|
|
|
}
|
|
|
|
/// SetJmpFn - LLVM _setjmp function.
|
|
llvm::Constant *getSetJmpFn() {
|
|
// This is specifically the prototype for x86.
|
|
llvm::Type *params[] = { CGM.Int32Ty->getPointerTo() };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.Int32Ty,
|
|
params, false),
|
|
"_setjmp");
|
|
}
|
|
|
|
public:
|
|
ObjCTypesHelper(CodeGen::CodeGenModule &cgm);
|
|
~ObjCTypesHelper() {}
|
|
};
|
|
|
|
/// ObjCNonFragileABITypesHelper - will have all types needed by objective-c's
|
|
/// modern abi
|
|
class ObjCNonFragileABITypesHelper : public ObjCCommonTypesHelper {
|
|
public:
|
|
|
|
// MethodListnfABITy - LLVM for struct _method_list_t
|
|
llvm::StructType *MethodListnfABITy;
|
|
|
|
// MethodListnfABIPtrTy - LLVM for struct _method_list_t*
|
|
llvm::Type *MethodListnfABIPtrTy;
|
|
|
|
// ProtocolnfABITy = LLVM for struct _protocol_t
|
|
llvm::StructType *ProtocolnfABITy;
|
|
|
|
// ProtocolnfABIPtrTy = LLVM for struct _protocol_t*
|
|
llvm::Type *ProtocolnfABIPtrTy;
|
|
|
|
// ProtocolListnfABITy - LLVM for struct _objc_protocol_list
|
|
llvm::StructType *ProtocolListnfABITy;
|
|
|
|
// ProtocolListnfABIPtrTy - LLVM for struct _objc_protocol_list*
|
|
llvm::Type *ProtocolListnfABIPtrTy;
|
|
|
|
// ClassnfABITy - LLVM for struct _class_t
|
|
llvm::StructType *ClassnfABITy;
|
|
|
|
// ClassnfABIPtrTy - LLVM for struct _class_t*
|
|
llvm::Type *ClassnfABIPtrTy;
|
|
|
|
// IvarnfABITy - LLVM for struct _ivar_t
|
|
llvm::StructType *IvarnfABITy;
|
|
|
|
// IvarListnfABITy - LLVM for struct _ivar_list_t
|
|
llvm::StructType *IvarListnfABITy;
|
|
|
|
// IvarListnfABIPtrTy = LLVM for struct _ivar_list_t*
|
|
llvm::Type *IvarListnfABIPtrTy;
|
|
|
|
// ClassRonfABITy - LLVM for struct _class_ro_t
|
|
llvm::StructType *ClassRonfABITy;
|
|
|
|
// ImpnfABITy - LLVM for id (*)(id, SEL, ...)
|
|
llvm::Type *ImpnfABITy;
|
|
|
|
// CategorynfABITy - LLVM for struct _category_t
|
|
llvm::StructType *CategorynfABITy;
|
|
|
|
// New types for nonfragile abi messaging.
|
|
|
|
// MessageRefTy - LLVM for:
|
|
// struct _message_ref_t {
|
|
// IMP messenger;
|
|
// SEL name;
|
|
// };
|
|
llvm::StructType *MessageRefTy;
|
|
// MessageRefCTy - clang type for struct _message_ref_t
|
|
QualType MessageRefCTy;
|
|
|
|
// MessageRefPtrTy - LLVM for struct _message_ref_t*
|
|
llvm::Type *MessageRefPtrTy;
|
|
// MessageRefCPtrTy - clang type for struct _message_ref_t*
|
|
QualType MessageRefCPtrTy;
|
|
|
|
// MessengerTy - Type of the messenger (shown as IMP above)
|
|
llvm::FunctionType *MessengerTy;
|
|
|
|
// SuperMessageRefTy - LLVM for:
|
|
// struct _super_message_ref_t {
|
|
// SUPER_IMP messenger;
|
|
// SEL name;
|
|
// };
|
|
llvm::StructType *SuperMessageRefTy;
|
|
|
|
// SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t*
|
|
llvm::Type *SuperMessageRefPtrTy;
|
|
|
|
llvm::Constant *getMessageSendFixupFn() {
|
|
// id objc_msgSend_fixup(id, struct message_ref_t*, ...)
|
|
llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, true),
|
|
"objc_msgSend_fixup");
|
|
}
|
|
|
|
llvm::Constant *getMessageSendFpretFixupFn() {
|
|
// id objc_msgSend_fpret_fixup(id, struct message_ref_t*, ...)
|
|
llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, true),
|
|
"objc_msgSend_fpret_fixup");
|
|
}
|
|
|
|
llvm::Constant *getMessageSendStretFixupFn() {
|
|
// id objc_msgSend_stret_fixup(id, struct message_ref_t*, ...)
|
|
llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, true),
|
|
"objc_msgSend_stret_fixup");
|
|
}
|
|
|
|
llvm::Constant *getMessageSendSuper2FixupFn() {
|
|
// id objc_msgSendSuper2_fixup (struct objc_super *,
|
|
// struct _super_message_ref_t*, ...)
|
|
llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, true),
|
|
"objc_msgSendSuper2_fixup");
|
|
}
|
|
|
|
llvm::Constant *getMessageSendSuper2StretFixupFn() {
|
|
// id objc_msgSendSuper2_stret_fixup(struct objc_super *,
|
|
// struct _super_message_ref_t*, ...)
|
|
llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
|
|
params, true),
|
|
"objc_msgSendSuper2_stret_fixup");
|
|
}
|
|
|
|
llvm::Constant *getObjCEndCatchFn() {
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy, false),
|
|
"objc_end_catch");
|
|
|
|
}
|
|
|
|
llvm::Constant *getObjCBeginCatchFn() {
|
|
llvm::Type *params[] = { Int8PtrTy };
|
|
return CGM.CreateRuntimeFunction(llvm::FunctionType::get(Int8PtrTy,
|
|
params, false),
|
|
"objc_begin_catch");
|
|
}
|
|
|
|
llvm::StructType *EHTypeTy;
|
|
llvm::Type *EHTypePtrTy;
|
|
|
|
ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm);
|
|
~ObjCNonFragileABITypesHelper(){}
|
|
};
|
|
|
|
class CGObjCCommonMac : public CodeGen::CGObjCRuntime {
|
|
public:
|
|
// FIXME - accessibility
|
|
class GC_IVAR {
|
|
public:
|
|
unsigned ivar_bytepos;
|
|
unsigned ivar_size;
|
|
GC_IVAR(unsigned bytepos = 0, unsigned size = 0)
|
|
: ivar_bytepos(bytepos), ivar_size(size) {}
|
|
|
|
// Allow sorting based on byte pos.
|
|
bool operator<(const GC_IVAR &b) const {
|
|
return ivar_bytepos < b.ivar_bytepos;
|
|
}
|
|
};
|
|
|
|
class SKIP_SCAN {
|
|
public:
|
|
unsigned skip;
|
|
unsigned scan;
|
|
SKIP_SCAN(unsigned _skip = 0, unsigned _scan = 0)
|
|
: skip(_skip), scan(_scan) {}
|
|
};
|
|
|
|
protected:
|
|
CodeGen::CodeGenModule &CGM;
|
|
llvm::LLVMContext &VMContext;
|
|
// FIXME! May not be needing this after all.
|
|
unsigned ObjCABI;
|
|
|
|
// gc ivar layout bitmap calculation helper caches.
|
|
SmallVector<GC_IVAR, 16> SkipIvars;
|
|
SmallVector<GC_IVAR, 16> IvarsInfo;
|
|
|
|
/// LazySymbols - Symbols to generate a lazy reference for. See
|
|
/// DefinedSymbols and FinishModule().
|
|
llvm::SetVector<IdentifierInfo*> LazySymbols;
|
|
|
|
/// DefinedSymbols - External symbols which are defined by this
|
|
/// module. The symbols in this list and LazySymbols are used to add
|
|
/// special linker symbols which ensure that Objective-C modules are
|
|
/// linked properly.
|
|
llvm::SetVector<IdentifierInfo*> DefinedSymbols;
|
|
|
|
/// ClassNames - uniqued class names.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassNames;
|
|
|
|
/// MethodVarNames - uniqued method variable names.
|
|
llvm::DenseMap<Selector, llvm::GlobalVariable*> MethodVarNames;
|
|
|
|
/// DefinedCategoryNames - list of category names in form Class_Category.
|
|
llvm::SetVector<std::string> DefinedCategoryNames;
|
|
|
|
/// MethodVarTypes - uniqued method type signatures. We have to use
|
|
/// a StringMap here because have no other unique reference.
|
|
llvm::StringMap<llvm::GlobalVariable*> MethodVarTypes;
|
|
|
|
/// MethodDefinitions - map of methods which have been defined in
|
|
/// this translation unit.
|
|
llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*> MethodDefinitions;
|
|
|
|
/// PropertyNames - uniqued method variable names.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> PropertyNames;
|
|
|
|
/// ClassReferences - uniqued class references.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassReferences;
|
|
|
|
/// SelectorReferences - uniqued selector references.
|
|
llvm::DenseMap<Selector, llvm::GlobalVariable*> SelectorReferences;
|
|
|
|
/// Protocols - Protocols for which an objc_protocol structure has
|
|
/// been emitted. Forward declarations are handled by creating an
|
|
/// empty structure whose initializer is filled in when/if defined.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> Protocols;
|
|
|
|
/// DefinedProtocols - Protocols which have actually been
|
|
/// defined. We should not need this, see FIXME in GenerateProtocol.
|
|
llvm::DenseSet<IdentifierInfo*> DefinedProtocols;
|
|
|
|
/// DefinedClasses - List of defined classes.
|
|
std::vector<llvm::GlobalValue*> DefinedClasses;
|
|
|
|
/// DefinedNonLazyClasses - List of defined "non-lazy" classes.
|
|
std::vector<llvm::GlobalValue*> DefinedNonLazyClasses;
|
|
|
|
/// DefinedCategories - List of defined categories.
|
|
std::vector<llvm::GlobalValue*> DefinedCategories;
|
|
|
|
/// DefinedNonLazyCategories - List of defined "non-lazy" categories.
|
|
std::vector<llvm::GlobalValue*> DefinedNonLazyCategories;
|
|
|
|
/// GetNameForMethod - Return a name for the given method.
|
|
/// \param[out] NameOut - The return value.
|
|
void GetNameForMethod(const ObjCMethodDecl *OMD,
|
|
const ObjCContainerDecl *CD,
|
|
SmallVectorImpl<char> &NameOut);
|
|
|
|
/// GetMethodVarName - Return a unique constant for the given
|
|
/// selector's name. The return value has type char *.
|
|
llvm::Constant *GetMethodVarName(Selector Sel);
|
|
llvm::Constant *GetMethodVarName(IdentifierInfo *Ident);
|
|
|
|
/// GetMethodVarType - Return a unique constant for the given
|
|
/// selector's name. The return value has type char *.
|
|
|
|
// FIXME: This is a horrible name.
|
|
llvm::Constant *GetMethodVarType(const ObjCMethodDecl *D);
|
|
llvm::Constant *GetMethodVarType(const FieldDecl *D);
|
|
|
|
/// GetPropertyName - Return a unique constant for the given
|
|
/// name. The return value has type char *.
|
|
llvm::Constant *GetPropertyName(IdentifierInfo *Ident);
|
|
|
|
// FIXME: This can be dropped once string functions are unified.
|
|
llvm::Constant *GetPropertyTypeString(const ObjCPropertyDecl *PD,
|
|
const Decl *Container);
|
|
|
|
/// GetClassName - Return a unique constant for the given selector's
|
|
/// name. The return value has type char *.
|
|
llvm::Constant *GetClassName(IdentifierInfo *Ident);
|
|
|
|
llvm::Function *GetMethodDefinition(const ObjCMethodDecl *MD);
|
|
|
|
/// BuildIvarLayout - Builds ivar layout bitmap for the class
|
|
/// implementation for the __strong or __weak case.
|
|
///
|
|
llvm::Constant *BuildIvarLayout(const ObjCImplementationDecl *OI,
|
|
bool ForStrongLayout);
|
|
|
|
llvm::Constant *BuildIvarLayoutBitmap(std::string &BitMap);
|
|
|
|
void BuildAggrIvarRecordLayout(const RecordType *RT,
|
|
unsigned int BytePos, bool ForStrongLayout,
|
|
bool &HasUnion);
|
|
void BuildAggrIvarLayout(const ObjCImplementationDecl *OI,
|
|
const llvm::StructLayout *Layout,
|
|
const RecordDecl *RD,
|
|
const SmallVectorImpl<const FieldDecl*> &RecFields,
|
|
unsigned int BytePos, bool ForStrongLayout,
|
|
bool &HasUnion);
|
|
|
|
/// GetIvarLayoutName - Returns a unique constant for the given
|
|
/// ivar layout bitmap.
|
|
llvm::Constant *GetIvarLayoutName(IdentifierInfo *Ident,
|
|
const ObjCCommonTypesHelper &ObjCTypes);
|
|
|
|
/// EmitPropertyList - Emit the given property list. The return
|
|
/// value has type PropertyListPtrTy.
|
|
llvm::Constant *EmitPropertyList(Twine Name,
|
|
const Decl *Container,
|
|
const ObjCContainerDecl *OCD,
|
|
const ObjCCommonTypesHelper &ObjCTypes);
|
|
|
|
/// PushProtocolProperties - Push protocol's property on the input stack.
|
|
void PushProtocolProperties(llvm::SmallPtrSet<const IdentifierInfo*, 16> &PropertySet,
|
|
std::vector<llvm::Constant*> &Properties,
|
|
const Decl *Container,
|
|
const ObjCProtocolDecl *PROTO,
|
|
const ObjCCommonTypesHelper &ObjCTypes);
|
|
|
|
/// GetProtocolRef - Return a reference to the internal protocol
|
|
/// description, creating an empty one if it has not been
|
|
/// defined. The return value has type ProtocolPtrTy.
|
|
llvm::Constant *GetProtocolRef(const ObjCProtocolDecl *PD);
|
|
|
|
/// CreateMetadataVar - Create a global variable with internal
|
|
/// linkage for use by the Objective-C runtime.
|
|
///
|
|
/// This is a convenience wrapper which not only creates the
|
|
/// variable, but also sets the section and alignment and adds the
|
|
/// global to the "llvm.used" list.
|
|
///
|
|
/// \param Name - The variable name.
|
|
/// \param Init - The variable initializer; this is also used to
|
|
/// define the type of the variable.
|
|
/// \param Section - The section the variable should go into, or 0.
|
|
/// \param Align - The alignment for the variable, or 0.
|
|
/// \param AddToUsed - Whether the variable should be added to
|
|
/// "llvm.used".
|
|
llvm::GlobalVariable *CreateMetadataVar(Twine Name,
|
|
llvm::Constant *Init,
|
|
const char *Section,
|
|
unsigned Align,
|
|
bool AddToUsed);
|
|
|
|
CodeGen::RValue EmitMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
llvm::Value *Sel,
|
|
llvm::Value *Arg0,
|
|
QualType Arg0Ty,
|
|
bool IsSuper,
|
|
const CallArgList &CallArgs,
|
|
const ObjCMethodDecl *OMD,
|
|
const ObjCCommonTypesHelper &ObjCTypes);
|
|
|
|
/// EmitImageInfo - Emit the image info marker used to encode some module
|
|
/// level information.
|
|
void EmitImageInfo();
|
|
|
|
public:
|
|
CGObjCCommonMac(CodeGen::CodeGenModule &cgm) :
|
|
CGM(cgm), VMContext(cgm.getLLVMContext()) { }
|
|
|
|
virtual llvm::Constant *GenerateConstantString(const StringLiteral *SL);
|
|
|
|
virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD,
|
|
const ObjCContainerDecl *CD=0);
|
|
|
|
virtual void GenerateProtocol(const ObjCProtocolDecl *PD);
|
|
|
|
/// GetOrEmitProtocol - Get the protocol object for the given
|
|
/// declaration, emitting it if necessary. The return value has type
|
|
/// ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD)=0;
|
|
|
|
/// GetOrEmitProtocolRef - Get a forward reference to the protocol
|
|
/// object for the given declaration, emitting it if needed. These
|
|
/// forward references will be filled in with empty bodies if no
|
|
/// definition is seen. The return value has type ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD)=0;
|
|
virtual llvm::Constant *BuildGCBlockLayout(CodeGen::CodeGenModule &CGM,
|
|
const CGBlockInfo &blockInfo);
|
|
|
|
};
|
|
|
|
class CGObjCMac : public CGObjCCommonMac {
|
|
private:
|
|
ObjCTypesHelper ObjCTypes;
|
|
|
|
/// EmitModuleInfo - Another marker encoding module level
|
|
/// information.
|
|
void EmitModuleInfo();
|
|
|
|
/// EmitModuleSymols - Emit module symbols, the list of defined
|
|
/// classes and categories. The result has type SymtabPtrTy.
|
|
llvm::Constant *EmitModuleSymbols();
|
|
|
|
/// FinishModule - Write out global data structures at the end of
|
|
/// processing a translation unit.
|
|
void FinishModule();
|
|
|
|
/// EmitClassExtension - Generate the class extension structure used
|
|
/// to store the weak ivar layout and properties. The return value
|
|
/// has type ClassExtensionPtrTy.
|
|
llvm::Constant *EmitClassExtension(const ObjCImplementationDecl *ID);
|
|
|
|
/// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
|
|
/// for the given class.
|
|
llvm::Value *EmitClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
llvm::Value *EmitClassRefFromId(CGBuilderTy &Builder,
|
|
IdentifierInfo *II);
|
|
|
|
llvm::Value *EmitNSAutoreleasePoolClassRef(CGBuilderTy &Builder);
|
|
|
|
/// EmitSuperClassRef - Emits reference to class's main metadata class.
|
|
llvm::Value *EmitSuperClassRef(const ObjCInterfaceDecl *ID);
|
|
|
|
/// EmitIvarList - Emit the ivar list for the given
|
|
/// implementation. If ForClass is true the list of class ivars
|
|
/// (i.e. metaclass ivars) is emitted, otherwise the list of
|
|
/// interface ivars will be emitted. The return value has type
|
|
/// IvarListPtrTy.
|
|
llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID,
|
|
bool ForClass);
|
|
|
|
/// EmitMetaClass - Emit a forward reference to the class structure
|
|
/// for the metaclass of the given interface. The return value has
|
|
/// type ClassPtrTy.
|
|
llvm::Constant *EmitMetaClassRef(const ObjCInterfaceDecl *ID);
|
|
|
|
/// EmitMetaClass - Emit a class structure for the metaclass of the
|
|
/// given implementation. The return value has type ClassPtrTy.
|
|
llvm::Constant *EmitMetaClass(const ObjCImplementationDecl *ID,
|
|
llvm::Constant *Protocols,
|
|
const ConstantVector &Methods);
|
|
|
|
llvm::Constant *GetMethodConstant(const ObjCMethodDecl *MD);
|
|
|
|
llvm::Constant *GetMethodDescriptionConstant(const ObjCMethodDecl *MD);
|
|
|
|
/// EmitMethodList - Emit the method list for the given
|
|
/// implementation. The return value has type MethodListPtrTy.
|
|
llvm::Constant *EmitMethodList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods);
|
|
|
|
/// EmitMethodDescList - Emit a method description list for a list of
|
|
/// method declarations.
|
|
/// - TypeName: The name for the type containing the methods.
|
|
/// - IsProtocol: True iff these methods are for a protocol.
|
|
/// - ClassMethds: True iff these are class methods.
|
|
/// - Required: When true, only "required" methods are
|
|
/// listed. Similarly, when false only "optional" methods are
|
|
/// listed. For classes this should always be true.
|
|
/// - begin, end: The method list to output.
|
|
///
|
|
/// The return value has type MethodDescriptionListPtrTy.
|
|
llvm::Constant *EmitMethodDescList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods);
|
|
|
|
/// GetOrEmitProtocol - Get the protocol object for the given
|
|
/// declaration, emitting it if necessary. The return value has type
|
|
/// ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD);
|
|
|
|
/// GetOrEmitProtocolRef - Get a forward reference to the protocol
|
|
/// object for the given declaration, emitting it if needed. These
|
|
/// forward references will be filled in with empty bodies if no
|
|
/// definition is seen. The return value has type ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD);
|
|
|
|
/// EmitProtocolExtension - Generate the protocol extension
|
|
/// structure used to store optional instance and class methods, and
|
|
/// protocol properties. The return value has type
|
|
/// ProtocolExtensionPtrTy.
|
|
llvm::Constant *
|
|
EmitProtocolExtension(const ObjCProtocolDecl *PD,
|
|
const ConstantVector &OptInstanceMethods,
|
|
const ConstantVector &OptClassMethods);
|
|
|
|
/// EmitProtocolList - Generate the list of referenced
|
|
/// protocols. The return value has type ProtocolListPtrTy.
|
|
llvm::Constant *EmitProtocolList(Twine Name,
|
|
ObjCProtocolDecl::protocol_iterator begin,
|
|
ObjCProtocolDecl::protocol_iterator end);
|
|
|
|
/// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy,
|
|
/// for the given selector.
|
|
llvm::Value *EmitSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lval=false);
|
|
|
|
public:
|
|
CGObjCMac(CodeGen::CodeGenModule &cgm);
|
|
|
|
virtual llvm::Function *ModuleInitFunction();
|
|
|
|
virtual CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
llvm::Value *Receiver,
|
|
const CallArgList &CallArgs,
|
|
const ObjCInterfaceDecl *Class,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
virtual CodeGen::RValue
|
|
GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
const ObjCInterfaceDecl *Class,
|
|
bool isCategoryImpl,
|
|
llvm::Value *Receiver,
|
|
bool IsClassMessage,
|
|
const CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
virtual llvm::Value *GetClass(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
virtual llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lval = false);
|
|
|
|
/// The NeXT/Apple runtimes do not support typed selectors; just emit an
|
|
/// untyped one.
|
|
virtual llvm::Value *GetSelector(CGBuilderTy &Builder,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
virtual llvm::Constant *GetEHType(QualType T);
|
|
|
|
virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD);
|
|
|
|
virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl);
|
|
|
|
virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder,
|
|
const ObjCProtocolDecl *PD);
|
|
|
|
virtual llvm::Constant *GetPropertyGetFunction();
|
|
virtual llvm::Constant *GetPropertySetFunction();
|
|
virtual llvm::Constant *GetGetStructFunction();
|
|
virtual llvm::Constant *GetSetStructFunction();
|
|
virtual llvm::Constant *EnumerationMutationFunction();
|
|
|
|
virtual void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtTryStmt &S);
|
|
virtual void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtSynchronizedStmt &S);
|
|
void EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, const Stmt &S);
|
|
virtual void EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtThrowStmt &S);
|
|
virtual llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *AddrWeakObj);
|
|
virtual void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst);
|
|
virtual void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest,
|
|
bool threadlocal = false);
|
|
virtual void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest,
|
|
llvm::Value *ivarOffset);
|
|
virtual void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest);
|
|
virtual void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *dest, llvm::Value *src,
|
|
llvm::Value *size);
|
|
|
|
virtual LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF,
|
|
QualType ObjectTy,
|
|
llvm::Value *BaseValue,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned CVRQualifiers);
|
|
virtual llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCInterfaceDecl *Interface,
|
|
const ObjCIvarDecl *Ivar);
|
|
|
|
/// GetClassGlobal - Return the global variable for the Objective-C
|
|
/// class of the given name.
|
|
virtual llvm::GlobalVariable *GetClassGlobal(const std::string &Name) {
|
|
llvm_unreachable("CGObjCMac::GetClassGlobal");
|
|
}
|
|
};
|
|
|
|
class CGObjCNonFragileABIMac : public CGObjCCommonMac {
|
|
private:
|
|
ObjCNonFragileABITypesHelper ObjCTypes;
|
|
llvm::GlobalVariable* ObjCEmptyCacheVar;
|
|
llvm::GlobalVariable* ObjCEmptyVtableVar;
|
|
|
|
/// SuperClassReferences - uniqued super class references.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> SuperClassReferences;
|
|
|
|
/// MetaClassReferences - uniqued meta class references.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> MetaClassReferences;
|
|
|
|
/// EHTypeReferences - uniqued class ehtype references.
|
|
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> EHTypeReferences;
|
|
|
|
/// VTableDispatchMethods - List of methods for which we generate
|
|
/// vtable-based message dispatch.
|
|
llvm::DenseSet<Selector> VTableDispatchMethods;
|
|
|
|
/// DefinedMetaClasses - List of defined meta-classes.
|
|
std::vector<llvm::GlobalValue*> DefinedMetaClasses;
|
|
|
|
/// isVTableDispatchedSelector - Returns true if SEL is a
|
|
/// vtable-based selector.
|
|
bool isVTableDispatchedSelector(Selector Sel);
|
|
|
|
/// FinishNonFragileABIModule - Write out global data structures at the end of
|
|
/// processing a translation unit.
|
|
void FinishNonFragileABIModule();
|
|
|
|
/// AddModuleClassList - Add the given list of class pointers to the
|
|
/// module with the provided symbol and section names.
|
|
void AddModuleClassList(const std::vector<llvm::GlobalValue*> &Container,
|
|
const char *SymbolName,
|
|
const char *SectionName);
|
|
|
|
llvm::GlobalVariable * BuildClassRoTInitializer(unsigned flags,
|
|
unsigned InstanceStart,
|
|
unsigned InstanceSize,
|
|
const ObjCImplementationDecl *ID);
|
|
llvm::GlobalVariable * BuildClassMetaData(std::string &ClassName,
|
|
llvm::Constant *IsAGV,
|
|
llvm::Constant *SuperClassGV,
|
|
llvm::Constant *ClassRoGV,
|
|
bool HiddenVisibility);
|
|
|
|
llvm::Constant *GetMethodConstant(const ObjCMethodDecl *MD);
|
|
|
|
llvm::Constant *GetMethodDescriptionConstant(const ObjCMethodDecl *MD);
|
|
|
|
/// EmitMethodList - Emit the method list for the given
|
|
/// implementation. The return value has type MethodListnfABITy.
|
|
llvm::Constant *EmitMethodList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods);
|
|
/// EmitIvarList - Emit the ivar list for the given
|
|
/// implementation. If ForClass is true the list of class ivars
|
|
/// (i.e. metaclass ivars) is emitted, otherwise the list of
|
|
/// interface ivars will be emitted. The return value has type
|
|
/// IvarListnfABIPtrTy.
|
|
llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID);
|
|
|
|
llvm::Constant *EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned long int offset);
|
|
|
|
/// GetOrEmitProtocol - Get the protocol object for the given
|
|
/// declaration, emitting it if necessary. The return value has type
|
|
/// ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD);
|
|
|
|
/// GetOrEmitProtocolRef - Get a forward reference to the protocol
|
|
/// object for the given declaration, emitting it if needed. These
|
|
/// forward references will be filled in with empty bodies if no
|
|
/// definition is seen. The return value has type ProtocolPtrTy.
|
|
virtual llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD);
|
|
|
|
/// EmitProtocolList - Generate the list of referenced
|
|
/// protocols. The return value has type ProtocolListPtrTy.
|
|
llvm::Constant *EmitProtocolList(Twine Name,
|
|
ObjCProtocolDecl::protocol_iterator begin,
|
|
ObjCProtocolDecl::protocol_iterator end);
|
|
|
|
CodeGen::RValue EmitVTableMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
llvm::Value *Receiver,
|
|
QualType Arg0Ty,
|
|
bool IsSuper,
|
|
const CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
/// GetClassGlobal - Return the global variable for the Objective-C
|
|
/// class of the given name.
|
|
llvm::GlobalVariable *GetClassGlobal(const std::string &Name);
|
|
|
|
/// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
|
|
/// for the given class reference.
|
|
llvm::Value *EmitClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
llvm::Value *EmitClassRefFromId(CGBuilderTy &Builder,
|
|
IdentifierInfo *II);
|
|
|
|
llvm::Value *EmitNSAutoreleasePoolClassRef(CGBuilderTy &Builder);
|
|
|
|
/// EmitSuperClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
|
|
/// for the given super class reference.
|
|
llvm::Value *EmitSuperClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
/// EmitMetaClassRef - Return a Value * of the address of _class_t
|
|
/// meta-data
|
|
llvm::Value *EmitMetaClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
/// ObjCIvarOffsetVariable - Returns the ivar offset variable for
|
|
/// the given ivar.
|
|
///
|
|
llvm::GlobalVariable * ObjCIvarOffsetVariable(
|
|
const ObjCInterfaceDecl *ID,
|
|
const ObjCIvarDecl *Ivar);
|
|
|
|
/// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy,
|
|
/// for the given selector.
|
|
llvm::Value *EmitSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lval=false);
|
|
|
|
/// GetInterfaceEHType - Get the cached ehtype for the given Objective-C
|
|
/// interface. The return value has type EHTypePtrTy.
|
|
llvm::Constant *GetInterfaceEHType(const ObjCInterfaceDecl *ID,
|
|
bool ForDefinition);
|
|
|
|
const char *getMetaclassSymbolPrefix() const {
|
|
return "OBJC_METACLASS_$_";
|
|
}
|
|
|
|
const char *getClassSymbolPrefix() const {
|
|
return "OBJC_CLASS_$_";
|
|
}
|
|
|
|
void GetClassSizeInfo(const ObjCImplementationDecl *OID,
|
|
uint32_t &InstanceStart,
|
|
uint32_t &InstanceSize);
|
|
|
|
// Shamelessly stolen from Analysis/CFRefCount.cpp
|
|
Selector GetNullarySelector(const char* name) const {
|
|
IdentifierInfo* II = &CGM.getContext().Idents.get(name);
|
|
return CGM.getContext().Selectors.getSelector(0, &II);
|
|
}
|
|
|
|
Selector GetUnarySelector(const char* name) const {
|
|
IdentifierInfo* II = &CGM.getContext().Idents.get(name);
|
|
return CGM.getContext().Selectors.getSelector(1, &II);
|
|
}
|
|
|
|
/// ImplementationIsNonLazy - Check whether the given category or
|
|
/// class implementation is "non-lazy".
|
|
bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const;
|
|
|
|
public:
|
|
CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm);
|
|
// FIXME. All stubs for now!
|
|
virtual llvm::Function *ModuleInitFunction();
|
|
|
|
virtual CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
llvm::Value *Receiver,
|
|
const CallArgList &CallArgs,
|
|
const ObjCInterfaceDecl *Class,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
virtual CodeGen::RValue
|
|
GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
const ObjCInterfaceDecl *Class,
|
|
bool isCategoryImpl,
|
|
llvm::Value *Receiver,
|
|
bool IsClassMessage,
|
|
const CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method);
|
|
|
|
virtual llvm::Value *GetClass(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID);
|
|
|
|
virtual llvm::Value *GetSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lvalue = false)
|
|
{ return EmitSelector(Builder, Sel, lvalue); }
|
|
|
|
/// The NeXT/Apple runtimes do not support typed selectors; just emit an
|
|
/// untyped one.
|
|
virtual llvm::Value *GetSelector(CGBuilderTy &Builder,
|
|
const ObjCMethodDecl *Method)
|
|
{ return EmitSelector(Builder, Method->getSelector()); }
|
|
|
|
virtual void GenerateCategory(const ObjCCategoryImplDecl *CMD);
|
|
|
|
virtual void GenerateClass(const ObjCImplementationDecl *ClassDecl);
|
|
virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder,
|
|
const ObjCProtocolDecl *PD);
|
|
|
|
virtual llvm::Constant *GetEHType(QualType T);
|
|
|
|
virtual llvm::Constant *GetPropertyGetFunction() {
|
|
return ObjCTypes.getGetPropertyFn();
|
|
}
|
|
virtual llvm::Constant *GetPropertySetFunction() {
|
|
return ObjCTypes.getSetPropertyFn();
|
|
}
|
|
|
|
virtual llvm::Constant *GetSetStructFunction() {
|
|
return ObjCTypes.getCopyStructFn();
|
|
}
|
|
virtual llvm::Constant *GetGetStructFunction() {
|
|
return ObjCTypes.getCopyStructFn();
|
|
}
|
|
|
|
virtual llvm::Constant *EnumerationMutationFunction() {
|
|
return ObjCTypes.getEnumerationMutationFn();
|
|
}
|
|
|
|
virtual void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtTryStmt &S);
|
|
virtual void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtSynchronizedStmt &S);
|
|
virtual void EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtThrowStmt &S);
|
|
virtual llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *AddrWeakObj);
|
|
virtual void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst);
|
|
virtual void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest,
|
|
bool threadlocal = false);
|
|
virtual void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest,
|
|
llvm::Value *ivarOffset);
|
|
virtual void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dest);
|
|
virtual void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *dest, llvm::Value *src,
|
|
llvm::Value *size);
|
|
virtual LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF,
|
|
QualType ObjectTy,
|
|
llvm::Value *BaseValue,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned CVRQualifiers);
|
|
virtual llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCInterfaceDecl *Interface,
|
|
const ObjCIvarDecl *Ivar);
|
|
};
|
|
|
|
/// A helper class for performing the null-initialization of a return
|
|
/// value.
|
|
struct NullReturnState {
|
|
llvm::BasicBlock *NullBB;
|
|
llvm::BasicBlock *callBB;
|
|
NullReturnState() : NullBB(0), callBB(0) {}
|
|
|
|
void init(CodeGenFunction &CGF, llvm::Value *receiver) {
|
|
// Make blocks for the null-init and call edges.
|
|
NullBB = CGF.createBasicBlock("msgSend.nullinit");
|
|
callBB = CGF.createBasicBlock("msgSend.call");
|
|
|
|
// Check for a null receiver and, if there is one, jump to the
|
|
// null-init test.
|
|
llvm::Value *isNull = CGF.Builder.CreateIsNull(receiver);
|
|
CGF.Builder.CreateCondBr(isNull, NullBB, callBB);
|
|
|
|
// Otherwise, start performing the call.
|
|
CGF.EmitBlock(callBB);
|
|
}
|
|
|
|
RValue complete(CodeGenFunction &CGF, RValue result, QualType resultType) {
|
|
if (!NullBB) return result;
|
|
|
|
// Finish the call path.
|
|
llvm::BasicBlock *contBB = CGF.createBasicBlock("msgSend.cont");
|
|
if (CGF.HaveInsertPoint()) CGF.Builder.CreateBr(contBB);
|
|
|
|
// Emit the null-init block and perform the null-initialization there.
|
|
CGF.EmitBlock(NullBB);
|
|
if (!resultType->isAnyComplexType()) {
|
|
assert(result.isAggregate() && "null init of non-aggregate result?");
|
|
CGF.EmitNullInitialization(result.getAggregateAddr(), resultType);
|
|
// Jump to the continuation block.
|
|
CGF.EmitBlock(contBB);
|
|
return result;
|
|
}
|
|
|
|
// _Complex type
|
|
// FIXME. Now easy to handle any other scalar type whose result is returned
|
|
// in memory due to ABI limitations.
|
|
CGF.EmitBlock(contBB);
|
|
CodeGenFunction::ComplexPairTy CallCV = result.getComplexVal();
|
|
llvm::Type *MemberType = CallCV.first->getType();
|
|
llvm::Constant *ZeroCV = llvm::Constant::getNullValue(MemberType);
|
|
// Create phi instruction for scalar complex value.
|
|
llvm::PHINode *PHIReal = CGF.Builder.CreatePHI(MemberType, 2);
|
|
PHIReal->addIncoming(ZeroCV, NullBB);
|
|
PHIReal->addIncoming(CallCV.first, callBB);
|
|
llvm::PHINode *PHIImag = CGF.Builder.CreatePHI(MemberType, 2);
|
|
PHIImag->addIncoming(ZeroCV, NullBB);
|
|
PHIImag->addIncoming(CallCV.second, callBB);
|
|
return RValue::getComplex(PHIReal, PHIImag);
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
/* *** Helper Functions *** */
|
|
|
|
/// getConstantGEP() - Help routine to construct simple GEPs.
|
|
static llvm::Constant *getConstantGEP(llvm::LLVMContext &VMContext,
|
|
llvm::Constant *C,
|
|
unsigned idx0,
|
|
unsigned idx1) {
|
|
llvm::Value *Idxs[] = {
|
|
llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx0),
|
|
llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx1)
|
|
};
|
|
return llvm::ConstantExpr::getGetElementPtr(C, Idxs);
|
|
}
|
|
|
|
/// hasObjCExceptionAttribute - Return true if this class or any super
|
|
/// class has the __objc_exception__ attribute.
|
|
static bool hasObjCExceptionAttribute(ASTContext &Context,
|
|
const ObjCInterfaceDecl *OID) {
|
|
if (OID->hasAttr<ObjCExceptionAttr>())
|
|
return true;
|
|
if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
|
|
return hasObjCExceptionAttribute(Context, Super);
|
|
return false;
|
|
}
|
|
|
|
/* *** CGObjCMac Public Interface *** */
|
|
|
|
CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) : CGObjCCommonMac(cgm),
|
|
ObjCTypes(cgm) {
|
|
ObjCABI = 1;
|
|
EmitImageInfo();
|
|
}
|
|
|
|
/// GetClass - Return a reference to the class for the given interface
|
|
/// decl.
|
|
llvm::Value *CGObjCMac::GetClass(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
return EmitClassRef(Builder, ID);
|
|
}
|
|
|
|
/// GetSelector - Return the pointer to the unique'd string for this selector.
|
|
llvm::Value *CGObjCMac::GetSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lval) {
|
|
return EmitSelector(Builder, Sel, lval);
|
|
}
|
|
llvm::Value *CGObjCMac::GetSelector(CGBuilderTy &Builder, const ObjCMethodDecl
|
|
*Method) {
|
|
return EmitSelector(Builder, Method->getSelector());
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::GetEHType(QualType T) {
|
|
if (T->isObjCIdType() ||
|
|
T->isObjCQualifiedIdType()) {
|
|
return CGM.GetAddrOfRTTIDescriptor(
|
|
CGM.getContext().getObjCIdRedefinitionType(), /*ForEH=*/true);
|
|
}
|
|
if (T->isObjCClassType() ||
|
|
T->isObjCQualifiedClassType()) {
|
|
return CGM.GetAddrOfRTTIDescriptor(
|
|
CGM.getContext().getObjCClassRedefinitionType(), /*ForEH=*/true);
|
|
}
|
|
if (T->isObjCObjectPointerType())
|
|
return CGM.GetAddrOfRTTIDescriptor(T, /*ForEH=*/true);
|
|
|
|
llvm_unreachable("asking for catch type for ObjC type in fragile runtime");
|
|
return 0;
|
|
}
|
|
|
|
/// Generate a constant CFString object.
|
|
/*
|
|
struct __builtin_CFString {
|
|
const int *isa; // point to __CFConstantStringClassReference
|
|
int flags;
|
|
const char *str;
|
|
long length;
|
|
};
|
|
*/
|
|
|
|
/// or Generate a constant NSString object.
|
|
/*
|
|
struct __builtin_NSString {
|
|
const int *isa; // point to __NSConstantStringClassReference
|
|
const char *str;
|
|
unsigned int length;
|
|
};
|
|
*/
|
|
|
|
llvm::Constant *CGObjCCommonMac::GenerateConstantString(
|
|
const StringLiteral *SL) {
|
|
return (CGM.getLangOptions().NoConstantCFStrings == 0 ?
|
|
CGM.GetAddrOfConstantCFString(SL) :
|
|
CGM.GetAddrOfConstantString(SL));
|
|
}
|
|
|
|
/// Generates a message send where the super is the receiver. This is
|
|
/// a message send to self with special delivery semantics indicating
|
|
/// which class's method should be called.
|
|
CodeGen::RValue
|
|
CGObjCMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
const ObjCInterfaceDecl *Class,
|
|
bool isCategoryImpl,
|
|
llvm::Value *Receiver,
|
|
bool IsClassMessage,
|
|
const CodeGen::CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method) {
|
|
// Create and init a super structure; this is a (receiver, class)
|
|
// pair we will pass to objc_msgSendSuper.
|
|
llvm::Value *ObjCSuper =
|
|
CGF.CreateTempAlloca(ObjCTypes.SuperTy, "objc_super");
|
|
llvm::Value *ReceiverAsObject =
|
|
CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
|
|
CGF.Builder.CreateStore(ReceiverAsObject,
|
|
CGF.Builder.CreateStructGEP(ObjCSuper, 0));
|
|
|
|
// If this is a class message the metaclass is passed as the target.
|
|
llvm::Value *Target;
|
|
if (IsClassMessage) {
|
|
if (isCategoryImpl) {
|
|
// Message sent to 'super' in a class method defined in a category
|
|
// implementation requires an odd treatment.
|
|
// If we are in a class method, we must retrieve the
|
|
// _metaclass_ for the current class, pointed at by
|
|
// the class's "isa" pointer. The following assumes that
|
|
// isa" is the first ivar in a class (which it must be).
|
|
Target = EmitClassRef(CGF.Builder, Class->getSuperClass());
|
|
Target = CGF.Builder.CreateStructGEP(Target, 0);
|
|
Target = CGF.Builder.CreateLoad(Target);
|
|
} else {
|
|
llvm::Value *MetaClassPtr = EmitMetaClassRef(Class);
|
|
llvm::Value *SuperPtr = CGF.Builder.CreateStructGEP(MetaClassPtr, 1);
|
|
llvm::Value *Super = CGF.Builder.CreateLoad(SuperPtr);
|
|
Target = Super;
|
|
}
|
|
}
|
|
else if (isCategoryImpl)
|
|
Target = EmitClassRef(CGF.Builder, Class->getSuperClass());
|
|
else {
|
|
llvm::Value *ClassPtr = EmitSuperClassRef(Class);
|
|
ClassPtr = CGF.Builder.CreateStructGEP(ClassPtr, 1);
|
|
Target = CGF.Builder.CreateLoad(ClassPtr);
|
|
}
|
|
// FIXME: We shouldn't need to do this cast, rectify the ASTContext and
|
|
// ObjCTypes types.
|
|
llvm::Type *ClassTy =
|
|
CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
|
|
Target = CGF.Builder.CreateBitCast(Target, ClassTy);
|
|
CGF.Builder.CreateStore(Target,
|
|
CGF.Builder.CreateStructGEP(ObjCSuper, 1));
|
|
return EmitMessageSend(CGF, Return, ResultType,
|
|
EmitSelector(CGF.Builder, Sel),
|
|
ObjCSuper, ObjCTypes.SuperPtrCTy,
|
|
true, CallArgs, Method, ObjCTypes);
|
|
}
|
|
|
|
/// Generate code for a message send expression.
|
|
CodeGen::RValue CGObjCMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
llvm::Value *Receiver,
|
|
const CallArgList &CallArgs,
|
|
const ObjCInterfaceDecl *Class,
|
|
const ObjCMethodDecl *Method) {
|
|
return EmitMessageSend(CGF, Return, ResultType,
|
|
EmitSelector(CGF.Builder, Sel),
|
|
Receiver, CGF.getContext().getObjCIdType(),
|
|
false, CallArgs, Method, ObjCTypes);
|
|
}
|
|
|
|
CodeGen::RValue
|
|
CGObjCCommonMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
llvm::Value *Sel,
|
|
llvm::Value *Arg0,
|
|
QualType Arg0Ty,
|
|
bool IsSuper,
|
|
const CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method,
|
|
const ObjCCommonTypesHelper &ObjCTypes) {
|
|
CallArgList ActualArgs;
|
|
if (!IsSuper)
|
|
Arg0 = CGF.Builder.CreateBitCast(Arg0, ObjCTypes.ObjectPtrTy);
|
|
ActualArgs.add(RValue::get(Arg0), Arg0Ty);
|
|
ActualArgs.add(RValue::get(Sel), CGF.getContext().getObjCSelType());
|
|
ActualArgs.addFrom(CallArgs);
|
|
|
|
CodeGenTypes &Types = CGM.getTypes();
|
|
const CGFunctionInfo &FnInfo = Types.getFunctionInfo(ResultType, ActualArgs,
|
|
FunctionType::ExtInfo());
|
|
llvm::FunctionType *FTy =
|
|
Types.GetFunctionType(FnInfo, Method ? Method->isVariadic() : false);
|
|
|
|
if (Method)
|
|
assert(CGM.getContext().getCanonicalType(Method->getResultType()) ==
|
|
CGM.getContext().getCanonicalType(ResultType) &&
|
|
"Result type mismatch!");
|
|
|
|
NullReturnState nullReturn;
|
|
|
|
llvm::Constant *Fn = NULL;
|
|
if (CGM.ReturnTypeUsesSRet(FnInfo)) {
|
|
if (!IsSuper) nullReturn.init(CGF, Arg0);
|
|
Fn = (ObjCABI == 2) ? ObjCTypes.getSendStretFn2(IsSuper)
|
|
: ObjCTypes.getSendStretFn(IsSuper);
|
|
} else if (CGM.ReturnTypeUsesFPRet(ResultType)) {
|
|
Fn = (ObjCABI == 2) ? ObjCTypes.getSendFpretFn2(IsSuper)
|
|
: ObjCTypes.getSendFpretFn(IsSuper);
|
|
} else if (CGM.ReturnTypeUsesFP2Ret(ResultType)) {
|
|
Fn = (ObjCABI == 2) ? ObjCTypes.getSendFp2RetFn2(IsSuper)
|
|
: ObjCTypes.getSendFp2retFn(IsSuper);
|
|
} else {
|
|
Fn = (ObjCABI == 2) ? ObjCTypes.getSendFn2(IsSuper)
|
|
: ObjCTypes.getSendFn(IsSuper);
|
|
}
|
|
Fn = llvm::ConstantExpr::getBitCast(Fn, llvm::PointerType::getUnqual(FTy));
|
|
RValue rvalue = CGF.EmitCall(FnInfo, Fn, Return, ActualArgs);
|
|
return nullReturn.complete(CGF, rvalue, ResultType);
|
|
}
|
|
|
|
static Qualifiers::GC GetGCAttrTypeForType(ASTContext &Ctx, QualType FQT) {
|
|
if (FQT.isObjCGCStrong())
|
|
return Qualifiers::Strong;
|
|
|
|
if (FQT.isObjCGCWeak() || FQT.getObjCLifetime() == Qualifiers::OCL_Weak)
|
|
return Qualifiers::Weak;
|
|
|
|
if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType())
|
|
return Qualifiers::Strong;
|
|
|
|
if (const PointerType *PT = FQT->getAs<PointerType>())
|
|
return GetGCAttrTypeForType(Ctx, PT->getPointeeType());
|
|
|
|
return Qualifiers::GCNone;
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::BuildGCBlockLayout(CodeGenModule &CGM,
|
|
const CGBlockInfo &blockInfo) {
|
|
llvm::Constant *nullPtr =
|
|
llvm::Constant::getNullValue(llvm::Type::getInt8PtrTy(VMContext));
|
|
|
|
if (CGM.getLangOptions().getGC() == LangOptions::NonGC &&
|
|
!CGM.getLangOptions().ObjCAutoRefCount)
|
|
return nullPtr;
|
|
|
|
bool hasUnion = false;
|
|
SkipIvars.clear();
|
|
IvarsInfo.clear();
|
|
unsigned WordSizeInBits = CGM.getContext().getTargetInfo().getPointerWidth(0);
|
|
unsigned ByteSizeInBits = CGM.getContext().getTargetInfo().getCharWidth();
|
|
|
|
// __isa is the first field in block descriptor and must assume by runtime's
|
|
// convention that it is GC'able.
|
|
IvarsInfo.push_back(GC_IVAR(0, 1));
|
|
|
|
const BlockDecl *blockDecl = blockInfo.getBlockDecl();
|
|
|
|
// Calculate the basic layout of the block structure.
|
|
const llvm::StructLayout *layout =
|
|
CGM.getTargetData().getStructLayout(blockInfo.StructureType);
|
|
|
|
// Ignore the optional 'this' capture: C++ objects are not assumed
|
|
// to be GC'ed.
|
|
|
|
// Walk the captured variables.
|
|
for (BlockDecl::capture_const_iterator ci = blockDecl->capture_begin(),
|
|
ce = blockDecl->capture_end(); ci != ce; ++ci) {
|
|
const VarDecl *variable = ci->getVariable();
|
|
QualType type = variable->getType();
|
|
|
|
const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable);
|
|
|
|
// Ignore constant captures.
|
|
if (capture.isConstant()) continue;
|
|
|
|
uint64_t fieldOffset = layout->getElementOffset(capture.getIndex());
|
|
|
|
// __block variables are passed by their descriptor address.
|
|
if (ci->isByRef()) {
|
|
IvarsInfo.push_back(GC_IVAR(fieldOffset, /*size in words*/ 1));
|
|
continue;
|
|
}
|
|
|
|
assert(!type->isArrayType() && "array variable should not be caught");
|
|
if (const RecordType *record = type->getAs<RecordType>()) {
|
|
BuildAggrIvarRecordLayout(record, fieldOffset, true, hasUnion);
|
|
continue;
|
|
}
|
|
|
|
Qualifiers::GC GCAttr = GetGCAttrTypeForType(CGM.getContext(), type);
|
|
unsigned fieldSize = CGM.getContext().getTypeSize(type);
|
|
|
|
if (GCAttr == Qualifiers::Strong)
|
|
IvarsInfo.push_back(GC_IVAR(fieldOffset,
|
|
fieldSize / WordSizeInBits));
|
|
else if (GCAttr == Qualifiers::GCNone || GCAttr == Qualifiers::Weak)
|
|
SkipIvars.push_back(GC_IVAR(fieldOffset,
|
|
fieldSize / ByteSizeInBits));
|
|
}
|
|
|
|
if (IvarsInfo.empty())
|
|
return nullPtr;
|
|
|
|
// Sort on byte position; captures might not be allocated in order,
|
|
// and unions can do funny things.
|
|
llvm::array_pod_sort(IvarsInfo.begin(), IvarsInfo.end());
|
|
llvm::array_pod_sort(SkipIvars.begin(), SkipIvars.end());
|
|
|
|
std::string BitMap;
|
|
llvm::Constant *C = BuildIvarLayoutBitmap(BitMap);
|
|
if (CGM.getLangOptions().ObjCGCBitmapPrint) {
|
|
printf("\n block variable layout for block: ");
|
|
const unsigned char *s = (unsigned char*)BitMap.c_str();
|
|
for (unsigned i = 0; i < BitMap.size(); i++)
|
|
if (!(s[i] & 0xf0))
|
|
printf("0x0%x%s", s[i], s[i] != 0 ? ", " : "");
|
|
else
|
|
printf("0x%x%s", s[i], s[i] != 0 ? ", " : "");
|
|
printf("\n");
|
|
}
|
|
|
|
return C;
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::GenerateProtocolRef(CGBuilderTy &Builder,
|
|
const ObjCProtocolDecl *PD) {
|
|
// FIXME: I don't understand why gcc generates this, or where it is
|
|
// resolved. Investigate. Its also wasteful to look this up over and over.
|
|
LazySymbols.insert(&CGM.getContext().Idents.get("Protocol"));
|
|
|
|
return llvm::ConstantExpr::getBitCast(GetProtocolRef(PD),
|
|
ObjCTypes.ExternalProtocolPtrTy);
|
|
}
|
|
|
|
void CGObjCCommonMac::GenerateProtocol(const ObjCProtocolDecl *PD) {
|
|
// FIXME: We shouldn't need this, the protocol decl should contain enough
|
|
// information to tell us whether this was a declaration or a definition.
|
|
DefinedProtocols.insert(PD->getIdentifier());
|
|
|
|
// If we have generated a forward reference to this protocol, emit
|
|
// it now. Otherwise do nothing, the protocol objects are lazily
|
|
// emitted.
|
|
if (Protocols.count(PD->getIdentifier()))
|
|
GetOrEmitProtocol(PD);
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::GetProtocolRef(const ObjCProtocolDecl *PD) {
|
|
if (DefinedProtocols.count(PD->getIdentifier()))
|
|
return GetOrEmitProtocol(PD);
|
|
|
|
return GetOrEmitProtocolRef(PD);
|
|
}
|
|
|
|
/*
|
|
// APPLE LOCAL radar 4585769 - Objective-C 1.0 extensions
|
|
struct _objc_protocol {
|
|
struct _objc_protocol_extension *isa;
|
|
char *protocol_name;
|
|
struct _objc_protocol_list *protocol_list;
|
|
struct _objc__method_prototype_list *instance_methods;
|
|
struct _objc__method_prototype_list *class_methods
|
|
};
|
|
|
|
See EmitProtocolExtension().
|
|
*/
|
|
llvm::Constant *CGObjCMac::GetOrEmitProtocol(const ObjCProtocolDecl *PD) {
|
|
llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
|
|
|
|
// Early exit if a defining object has already been generated.
|
|
if (Entry && Entry->hasInitializer())
|
|
return Entry;
|
|
|
|
// FIXME: I don't understand why gcc generates this, or where it is
|
|
// resolved. Investigate. Its also wasteful to look this up over and over.
|
|
LazySymbols.insert(&CGM.getContext().Idents.get("Protocol"));
|
|
|
|
// Construct method lists.
|
|
std::vector<llvm::Constant*> InstanceMethods, ClassMethods;
|
|
std::vector<llvm::Constant*> OptInstanceMethods, OptClassMethods;
|
|
for (ObjCProtocolDecl::instmeth_iterator
|
|
i = PD->instmeth_begin(), e = PD->instmeth_end(); i != e; ++i) {
|
|
ObjCMethodDecl *MD = *i;
|
|
llvm::Constant *C = GetMethodDescriptionConstant(MD);
|
|
if (!C)
|
|
return GetOrEmitProtocolRef(PD);
|
|
|
|
if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
|
|
OptInstanceMethods.push_back(C);
|
|
} else {
|
|
InstanceMethods.push_back(C);
|
|
}
|
|
}
|
|
|
|
for (ObjCProtocolDecl::classmeth_iterator
|
|
i = PD->classmeth_begin(), e = PD->classmeth_end(); i != e; ++i) {
|
|
ObjCMethodDecl *MD = *i;
|
|
llvm::Constant *C = GetMethodDescriptionConstant(MD);
|
|
if (!C)
|
|
return GetOrEmitProtocolRef(PD);
|
|
|
|
if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
|
|
OptClassMethods.push_back(C);
|
|
} else {
|
|
ClassMethods.push_back(C);
|
|
}
|
|
}
|
|
|
|
llvm::Constant *Values[] = {
|
|
EmitProtocolExtension(PD, OptInstanceMethods, OptClassMethods),
|
|
GetClassName(PD->getIdentifier()),
|
|
EmitProtocolList("\01L_OBJC_PROTOCOL_REFS_" + PD->getName(),
|
|
PD->protocol_begin(),
|
|
PD->protocol_end()),
|
|
EmitMethodDescList("\01L_OBJC_PROTOCOL_INSTANCE_METHODS_" + PD->getName(),
|
|
"__OBJC,__cat_inst_meth,regular,no_dead_strip",
|
|
InstanceMethods),
|
|
EmitMethodDescList("\01L_OBJC_PROTOCOL_CLASS_METHODS_" + PD->getName(),
|
|
"__OBJC,__cat_cls_meth,regular,no_dead_strip",
|
|
ClassMethods)
|
|
};
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ProtocolTy,
|
|
Values);
|
|
|
|
if (Entry) {
|
|
// Already created, fix the linkage and update the initializer.
|
|
Entry->setLinkage(llvm::GlobalValue::InternalLinkage);
|
|
Entry->setInitializer(Init);
|
|
} else {
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolTy, false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init,
|
|
"\01L_OBJC_PROTOCOL_" + PD->getName());
|
|
Entry->setSection("__OBJC,__protocol,regular,no_dead_strip");
|
|
// FIXME: Is this necessary? Why only for protocol?
|
|
Entry->setAlignment(4);
|
|
}
|
|
CGM.AddUsedGlobal(Entry);
|
|
|
|
return Entry;
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) {
|
|
llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
|
|
|
|
if (!Entry) {
|
|
// We use the initializer as a marker of whether this is a forward
|
|
// reference or not. At module finalization we add the empty
|
|
// contents for protocols which were referenced but never defined.
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolTy, false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
"\01L_OBJC_PROTOCOL_" + PD->getName());
|
|
Entry->setSection("__OBJC,__protocol,regular,no_dead_strip");
|
|
// FIXME: Is this necessary? Why only for protocol?
|
|
Entry->setAlignment(4);
|
|
}
|
|
|
|
return Entry;
|
|
}
|
|
|
|
/*
|
|
struct _objc_protocol_extension {
|
|
uint32_t size;
|
|
struct objc_method_description_list *optional_instance_methods;
|
|
struct objc_method_description_list *optional_class_methods;
|
|
struct objc_property_list *instance_properties;
|
|
};
|
|
*/
|
|
llvm::Constant *
|
|
CGObjCMac::EmitProtocolExtension(const ObjCProtocolDecl *PD,
|
|
const ConstantVector &OptInstanceMethods,
|
|
const ConstantVector &OptClassMethods) {
|
|
uint64_t Size =
|
|
CGM.getTargetData().getTypeAllocSize(ObjCTypes.ProtocolExtensionTy);
|
|
llvm::Constant *Values[] = {
|
|
llvm::ConstantInt::get(ObjCTypes.IntTy, Size),
|
|
EmitMethodDescList("\01L_OBJC_PROTOCOL_INSTANCE_METHODS_OPT_"
|
|
+ PD->getName(),
|
|
"__OBJC,__cat_inst_meth,regular,no_dead_strip",
|
|
OptInstanceMethods),
|
|
EmitMethodDescList("\01L_OBJC_PROTOCOL_CLASS_METHODS_OPT_" + PD->getName(),
|
|
"__OBJC,__cat_cls_meth,regular,no_dead_strip",
|
|
OptClassMethods),
|
|
EmitPropertyList("\01L_OBJC_$_PROP_PROTO_LIST_" + PD->getName(), 0, PD,
|
|
ObjCTypes)
|
|
};
|
|
|
|
// Return null if no extension bits are used.
|
|
if (Values[1]->isNullValue() && Values[2]->isNullValue() &&
|
|
Values[3]->isNullValue())
|
|
return llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy);
|
|
|
|
llvm::Constant *Init =
|
|
llvm::ConstantStruct::get(ObjCTypes.ProtocolExtensionTy, Values);
|
|
|
|
// No special section, but goes in llvm.used
|
|
return CreateMetadataVar("\01L_OBJC_PROTOCOLEXT_" + PD->getName(),
|
|
Init,
|
|
0, 0, true);
|
|
}
|
|
|
|
/*
|
|
struct objc_protocol_list {
|
|
struct objc_protocol_list *next;
|
|
long count;
|
|
Protocol *list[];
|
|
};
|
|
*/
|
|
llvm::Constant *
|
|
CGObjCMac::EmitProtocolList(Twine Name,
|
|
ObjCProtocolDecl::protocol_iterator begin,
|
|
ObjCProtocolDecl::protocol_iterator end) {
|
|
std::vector<llvm::Constant*> ProtocolRefs;
|
|
|
|
for (; begin != end; ++begin)
|
|
ProtocolRefs.push_back(GetProtocolRef(*begin));
|
|
|
|
// Just return null for empty protocol lists
|
|
if (ProtocolRefs.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy);
|
|
|
|
// This list is null terminated.
|
|
ProtocolRefs.push_back(llvm::Constant::getNullValue(ObjCTypes.ProtocolPtrTy));
|
|
|
|
llvm::Constant *Values[3];
|
|
// This field is only used by the runtime.
|
|
Values[0] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy);
|
|
Values[1] = llvm::ConstantInt::get(ObjCTypes.LongTy,
|
|
ProtocolRefs.size() - 1);
|
|
Values[2] =
|
|
llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.ProtocolPtrTy,
|
|
ProtocolRefs.size()),
|
|
ProtocolRefs);
|
|
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
llvm::GlobalVariable *GV =
|
|
CreateMetadataVar(Name, Init, "__OBJC,__cat_cls_meth,regular,no_dead_strip",
|
|
4, false);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListPtrTy);
|
|
}
|
|
|
|
void CGObjCCommonMac::PushProtocolProperties(llvm::SmallPtrSet<const IdentifierInfo*, 16> &PropertySet,
|
|
std::vector<llvm::Constant*> &Properties,
|
|
const Decl *Container,
|
|
const ObjCProtocolDecl *PROTO,
|
|
const ObjCCommonTypesHelper &ObjCTypes) {
|
|
for (ObjCProtocolDecl::protocol_iterator P = PROTO->protocol_begin(),
|
|
E = PROTO->protocol_end(); P != E; ++P)
|
|
PushProtocolProperties(PropertySet, Properties, Container, (*P), ObjCTypes);
|
|
for (ObjCContainerDecl::prop_iterator I = PROTO->prop_begin(),
|
|
E = PROTO->prop_end(); I != E; ++I) {
|
|
const ObjCPropertyDecl *PD = *I;
|
|
if (!PropertySet.insert(PD->getIdentifier()))
|
|
continue;
|
|
llvm::Constant *Prop[] = {
|
|
GetPropertyName(PD->getIdentifier()),
|
|
GetPropertyTypeString(PD, Container)
|
|
};
|
|
Properties.push_back(llvm::ConstantStruct::get(ObjCTypes.PropertyTy, Prop));
|
|
}
|
|
}
|
|
|
|
/*
|
|
struct _objc_property {
|
|
const char * const name;
|
|
const char * const attributes;
|
|
};
|
|
|
|
struct _objc_property_list {
|
|
uint32_t entsize; // sizeof (struct _objc_property)
|
|
uint32_t prop_count;
|
|
struct _objc_property[prop_count];
|
|
};
|
|
*/
|
|
llvm::Constant *CGObjCCommonMac::EmitPropertyList(Twine Name,
|
|
const Decl *Container,
|
|
const ObjCContainerDecl *OCD,
|
|
const ObjCCommonTypesHelper &ObjCTypes) {
|
|
std::vector<llvm::Constant*> Properties;
|
|
llvm::SmallPtrSet<const IdentifierInfo*, 16> PropertySet;
|
|
for (ObjCContainerDecl::prop_iterator I = OCD->prop_begin(),
|
|
E = OCD->prop_end(); I != E; ++I) {
|
|
const ObjCPropertyDecl *PD = *I;
|
|
PropertySet.insert(PD->getIdentifier());
|
|
llvm::Constant *Prop[] = {
|
|
GetPropertyName(PD->getIdentifier()),
|
|
GetPropertyTypeString(PD, Container)
|
|
};
|
|
Properties.push_back(llvm::ConstantStruct::get(ObjCTypes.PropertyTy,
|
|
Prop));
|
|
}
|
|
if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(OCD)) {
|
|
for (ObjCInterfaceDecl::all_protocol_iterator
|
|
P = OID->all_referenced_protocol_begin(),
|
|
E = OID->all_referenced_protocol_end(); P != E; ++P)
|
|
PushProtocolProperties(PropertySet, Properties, Container, (*P),
|
|
ObjCTypes);
|
|
}
|
|
else if (const ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(OCD)) {
|
|
for (ObjCCategoryDecl::protocol_iterator P = CD->protocol_begin(),
|
|
E = CD->protocol_end(); P != E; ++P)
|
|
PushProtocolProperties(PropertySet, Properties, Container, (*P),
|
|
ObjCTypes);
|
|
}
|
|
|
|
// Return null for empty list.
|
|
if (Properties.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
|
|
|
|
unsigned PropertySize =
|
|
CGM.getTargetData().getTypeAllocSize(ObjCTypes.PropertyTy);
|
|
llvm::Constant *Values[3];
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, PropertySize);
|
|
Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Properties.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.PropertyTy,
|
|
Properties.size());
|
|
Values[2] = llvm::ConstantArray::get(AT, Properties);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV =
|
|
CreateMetadataVar(Name, Init,
|
|
(ObjCABI == 2) ? "__DATA, __objc_const" :
|
|
"__OBJC,__property,regular,no_dead_strip",
|
|
(ObjCABI == 2) ? 8 : 4,
|
|
true);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.PropertyListPtrTy);
|
|
}
|
|
|
|
/*
|
|
struct objc_method_description_list {
|
|
int count;
|
|
struct objc_method_description list[];
|
|
};
|
|
*/
|
|
llvm::Constant *
|
|
CGObjCMac::GetMethodDescriptionConstant(const ObjCMethodDecl *MD) {
|
|
llvm::Constant *Desc[] = {
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()),
|
|
ObjCTypes.SelectorPtrTy),
|
|
GetMethodVarType(MD)
|
|
};
|
|
if (!Desc[1])
|
|
return 0;
|
|
|
|
return llvm::ConstantStruct::get(ObjCTypes.MethodDescriptionTy,
|
|
Desc);
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EmitMethodDescList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods) {
|
|
// Return null for empty list.
|
|
if (Methods.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.MethodDescriptionListPtrTy);
|
|
|
|
llvm::Constant *Values[2];
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Methods.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.MethodDescriptionTy,
|
|
Methods.size());
|
|
Values[1] = llvm::ConstantArray::get(AT, Methods);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV = CreateMetadataVar(Name, Init, Section, 4, true);
|
|
return llvm::ConstantExpr::getBitCast(GV,
|
|
ObjCTypes.MethodDescriptionListPtrTy);
|
|
}
|
|
|
|
/*
|
|
struct _objc_category {
|
|
char *category_name;
|
|
char *class_name;
|
|
struct _objc_method_list *instance_methods;
|
|
struct _objc_method_list *class_methods;
|
|
struct _objc_protocol_list *protocols;
|
|
uint32_t size; // <rdar://4585769>
|
|
struct _objc_property_list *instance_properties;
|
|
};
|
|
*/
|
|
void CGObjCMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(ObjCTypes.CategoryTy);
|
|
|
|
// FIXME: This is poor design, the OCD should have a pointer to the category
|
|
// decl. Additionally, note that Category can be null for the @implementation
|
|
// w/o an @interface case. Sema should just create one for us as it does for
|
|
// @implementation so everyone else can live life under a clear blue sky.
|
|
const ObjCInterfaceDecl *Interface = OCD->getClassInterface();
|
|
const ObjCCategoryDecl *Category =
|
|
Interface->FindCategoryDeclaration(OCD->getIdentifier());
|
|
|
|
llvm::SmallString<256> ExtName;
|
|
llvm::raw_svector_ostream(ExtName) << Interface->getName() << '_'
|
|
<< OCD->getName();
|
|
|
|
std::vector<llvm::Constant*> InstanceMethods, ClassMethods;
|
|
for (ObjCCategoryImplDecl::instmeth_iterator
|
|
i = OCD->instmeth_begin(), e = OCD->instmeth_end(); i != e; ++i) {
|
|
// Instance methods should always be defined.
|
|
InstanceMethods.push_back(GetMethodConstant(*i));
|
|
}
|
|
for (ObjCCategoryImplDecl::classmeth_iterator
|
|
i = OCD->classmeth_begin(), e = OCD->classmeth_end(); i != e; ++i) {
|
|
// Class methods should always be defined.
|
|
ClassMethods.push_back(GetMethodConstant(*i));
|
|
}
|
|
|
|
llvm::Constant *Values[7];
|
|
Values[0] = GetClassName(OCD->getIdentifier());
|
|
Values[1] = GetClassName(Interface->getIdentifier());
|
|
LazySymbols.insert(Interface->getIdentifier());
|
|
Values[2] =
|
|
EmitMethodList("\01L_OBJC_CATEGORY_INSTANCE_METHODS_" + ExtName.str(),
|
|
"__OBJC,__cat_inst_meth,regular,no_dead_strip",
|
|
InstanceMethods);
|
|
Values[3] =
|
|
EmitMethodList("\01L_OBJC_CATEGORY_CLASS_METHODS_" + ExtName.str(),
|
|
"__OBJC,__cat_cls_meth,regular,no_dead_strip",
|
|
ClassMethods);
|
|
if (Category) {
|
|
Values[4] =
|
|
EmitProtocolList("\01L_OBJC_CATEGORY_PROTOCOLS_" + ExtName.str(),
|
|
Category->protocol_begin(),
|
|
Category->protocol_end());
|
|
} else {
|
|
Values[4] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy);
|
|
}
|
|
Values[5] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
|
|
// If there is no category @interface then there can be no properties.
|
|
if (Category) {
|
|
Values[6] = EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ExtName.str(),
|
|
OCD, Category, ObjCTypes);
|
|
} else {
|
|
Values[6] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
|
|
}
|
|
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.CategoryTy,
|
|
Values);
|
|
|
|
llvm::GlobalVariable *GV =
|
|
CreateMetadataVar("\01L_OBJC_CATEGORY_" + ExtName.str(), Init,
|
|
"__OBJC,__category,regular,no_dead_strip",
|
|
4, true);
|
|
DefinedCategories.push_back(GV);
|
|
DefinedCategoryNames.insert(ExtName.str());
|
|
// method definition entries must be clear for next implementation.
|
|
MethodDefinitions.clear();
|
|
}
|
|
|
|
// FIXME: Get from somewhere?
|
|
enum ClassFlags {
|
|
eClassFlags_Factory = 0x00001,
|
|
eClassFlags_Meta = 0x00002,
|
|
// <rdr://5142207>
|
|
eClassFlags_HasCXXStructors = 0x02000,
|
|
eClassFlags_Hidden = 0x20000,
|
|
eClassFlags_ABI2_Hidden = 0x00010,
|
|
eClassFlags_ABI2_HasCXXStructors = 0x00004 // <rdr://4923634>
|
|
};
|
|
|
|
/*
|
|
struct _objc_class {
|
|
Class isa;
|
|
Class super_class;
|
|
const char *name;
|
|
long version;
|
|
long info;
|
|
long instance_size;
|
|
struct _objc_ivar_list *ivars;
|
|
struct _objc_method_list *methods;
|
|
struct _objc_cache *cache;
|
|
struct _objc_protocol_list *protocols;
|
|
// Objective-C 1.0 extensions (<rdr://4585769>)
|
|
const char *ivar_layout;
|
|
struct _objc_class_ext *ext;
|
|
};
|
|
|
|
See EmitClassExtension();
|
|
*/
|
|
void CGObjCMac::GenerateClass(const ObjCImplementationDecl *ID) {
|
|
DefinedSymbols.insert(ID->getIdentifier());
|
|
|
|
std::string ClassName = ID->getNameAsString();
|
|
// FIXME: Gross
|
|
ObjCInterfaceDecl *Interface =
|
|
const_cast<ObjCInterfaceDecl*>(ID->getClassInterface());
|
|
llvm::Constant *Protocols =
|
|
EmitProtocolList("\01L_OBJC_CLASS_PROTOCOLS_" + ID->getName(),
|
|
Interface->all_referenced_protocol_begin(),
|
|
Interface->all_referenced_protocol_end());
|
|
unsigned Flags = eClassFlags_Factory;
|
|
if (ID->hasCXXStructors())
|
|
Flags |= eClassFlags_HasCXXStructors;
|
|
unsigned Size =
|
|
CGM.getContext().getASTObjCImplementationLayout(ID).getSize().getQuantity();
|
|
|
|
// FIXME: Set CXX-structors flag.
|
|
if (ID->getClassInterface()->getVisibility() == HiddenVisibility)
|
|
Flags |= eClassFlags_Hidden;
|
|
|
|
std::vector<llvm::Constant*> InstanceMethods, ClassMethods;
|
|
for (ObjCImplementationDecl::instmeth_iterator
|
|
i = ID->instmeth_begin(), e = ID->instmeth_end(); i != e; ++i) {
|
|
// Instance methods should always be defined.
|
|
InstanceMethods.push_back(GetMethodConstant(*i));
|
|
}
|
|
for (ObjCImplementationDecl::classmeth_iterator
|
|
i = ID->classmeth_begin(), e = ID->classmeth_end(); i != e; ++i) {
|
|
// Class methods should always be defined.
|
|
ClassMethods.push_back(GetMethodConstant(*i));
|
|
}
|
|
|
|
for (ObjCImplementationDecl::propimpl_iterator
|
|
i = ID->propimpl_begin(), e = ID->propimpl_end(); i != e; ++i) {
|
|
ObjCPropertyImplDecl *PID = *i;
|
|
|
|
if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) {
|
|
ObjCPropertyDecl *PD = PID->getPropertyDecl();
|
|
|
|
if (ObjCMethodDecl *MD = PD->getGetterMethodDecl())
|
|
if (llvm::Constant *C = GetMethodConstant(MD))
|
|
InstanceMethods.push_back(C);
|
|
if (ObjCMethodDecl *MD = PD->getSetterMethodDecl())
|
|
if (llvm::Constant *C = GetMethodConstant(MD))
|
|
InstanceMethods.push_back(C);
|
|
}
|
|
}
|
|
|
|
llvm::Constant *Values[12];
|
|
Values[ 0] = EmitMetaClass(ID, Protocols, ClassMethods);
|
|
if (ObjCInterfaceDecl *Super = Interface->getSuperClass()) {
|
|
// Record a reference to the super class.
|
|
LazySymbols.insert(Super->getIdentifier());
|
|
|
|
Values[ 1] =
|
|
llvm::ConstantExpr::getBitCast(GetClassName(Super->getIdentifier()),
|
|
ObjCTypes.ClassPtrTy);
|
|
} else {
|
|
Values[ 1] = llvm::Constant::getNullValue(ObjCTypes.ClassPtrTy);
|
|
}
|
|
Values[ 2] = GetClassName(ID->getIdentifier());
|
|
// Version is always 0.
|
|
Values[ 3] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0);
|
|
Values[ 4] = llvm::ConstantInt::get(ObjCTypes.LongTy, Flags);
|
|
Values[ 5] = llvm::ConstantInt::get(ObjCTypes.LongTy, Size);
|
|
Values[ 6] = EmitIvarList(ID, false);
|
|
Values[ 7] =
|
|
EmitMethodList("\01L_OBJC_INSTANCE_METHODS_" + ID->getName(),
|
|
"__OBJC,__inst_meth,regular,no_dead_strip",
|
|
InstanceMethods);
|
|
// cache is always NULL.
|
|
Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.CachePtrTy);
|
|
Values[ 9] = Protocols;
|
|
Values[10] = BuildIvarLayout(ID, true);
|
|
Values[11] = EmitClassExtension(ID);
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassTy,
|
|
Values);
|
|
std::string Name("\01L_OBJC_CLASS_");
|
|
Name += ClassName;
|
|
const char *Section = "__OBJC,__class,regular,no_dead_strip";
|
|
// Check for a forward reference.
|
|
llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name);
|
|
if (GV) {
|
|
assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
|
|
"Forward metaclass reference has incorrect type.");
|
|
GV->setLinkage(llvm::GlobalValue::InternalLinkage);
|
|
GV->setInitializer(Init);
|
|
GV->setSection(Section);
|
|
GV->setAlignment(4);
|
|
CGM.AddUsedGlobal(GV);
|
|
}
|
|
else
|
|
GV = CreateMetadataVar(Name, Init, Section, 4, true);
|
|
DefinedClasses.push_back(GV);
|
|
// method definition entries must be clear for next implementation.
|
|
MethodDefinitions.clear();
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EmitMetaClass(const ObjCImplementationDecl *ID,
|
|
llvm::Constant *Protocols,
|
|
const ConstantVector &Methods) {
|
|
unsigned Flags = eClassFlags_Meta;
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(ObjCTypes.ClassTy);
|
|
|
|
if (ID->getClassInterface()->getVisibility() == HiddenVisibility)
|
|
Flags |= eClassFlags_Hidden;
|
|
|
|
llvm::Constant *Values[12];
|
|
// The isa for the metaclass is the root of the hierarchy.
|
|
const ObjCInterfaceDecl *Root = ID->getClassInterface();
|
|
while (const ObjCInterfaceDecl *Super = Root->getSuperClass())
|
|
Root = Super;
|
|
Values[ 0] =
|
|
llvm::ConstantExpr::getBitCast(GetClassName(Root->getIdentifier()),
|
|
ObjCTypes.ClassPtrTy);
|
|
// The super class for the metaclass is emitted as the name of the
|
|
// super class. The runtime fixes this up to point to the
|
|
// *metaclass* for the super class.
|
|
if (ObjCInterfaceDecl *Super = ID->getClassInterface()->getSuperClass()) {
|
|
Values[ 1] =
|
|
llvm::ConstantExpr::getBitCast(GetClassName(Super->getIdentifier()),
|
|
ObjCTypes.ClassPtrTy);
|
|
} else {
|
|
Values[ 1] = llvm::Constant::getNullValue(ObjCTypes.ClassPtrTy);
|
|
}
|
|
Values[ 2] = GetClassName(ID->getIdentifier());
|
|
// Version is always 0.
|
|
Values[ 3] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0);
|
|
Values[ 4] = llvm::ConstantInt::get(ObjCTypes.LongTy, Flags);
|
|
Values[ 5] = llvm::ConstantInt::get(ObjCTypes.LongTy, Size);
|
|
Values[ 6] = EmitIvarList(ID, true);
|
|
Values[ 7] =
|
|
EmitMethodList("\01L_OBJC_CLASS_METHODS_" + ID->getNameAsString(),
|
|
"__OBJC,__cls_meth,regular,no_dead_strip",
|
|
Methods);
|
|
// cache is always NULL.
|
|
Values[ 8] = llvm::Constant::getNullValue(ObjCTypes.CachePtrTy);
|
|
Values[ 9] = Protocols;
|
|
// ivar_layout for metaclass is always NULL.
|
|
Values[10] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
|
|
// The class extension is always unused for metaclasses.
|
|
Values[11] = llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy);
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassTy,
|
|
Values);
|
|
|
|
std::string Name("\01L_OBJC_METACLASS_");
|
|
Name += ID->getNameAsCString();
|
|
|
|
// Check for a forward reference.
|
|
llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name);
|
|
if (GV) {
|
|
assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
|
|
"Forward metaclass reference has incorrect type.");
|
|
GV->setLinkage(llvm::GlobalValue::InternalLinkage);
|
|
GV->setInitializer(Init);
|
|
} else {
|
|
GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init, Name);
|
|
}
|
|
GV->setSection("__OBJC,__meta_class,regular,no_dead_strip");
|
|
GV->setAlignment(4);
|
|
CGM.AddUsedGlobal(GV);
|
|
|
|
return GV;
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EmitMetaClassRef(const ObjCInterfaceDecl *ID) {
|
|
std::string Name = "\01L_OBJC_METACLASS_" + ID->getNameAsString();
|
|
|
|
// FIXME: Should we look these up somewhere other than the module. Its a bit
|
|
// silly since we only generate these while processing an implementation, so
|
|
// exactly one pointer would work if know when we entered/exitted an
|
|
// implementation block.
|
|
|
|
// Check for an existing forward reference.
|
|
// Previously, metaclass with internal linkage may have been defined.
|
|
// pass 'true' as 2nd argument so it is returned.
|
|
if (llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name,
|
|
true)) {
|
|
assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
|
|
"Forward metaclass reference has incorrect type.");
|
|
return GV;
|
|
} else {
|
|
// Generate as an external reference to keep a consistent
|
|
// module. This will be patched up when we emit the metaclass.
|
|
return new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
Name);
|
|
}
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitSuperClassRef(const ObjCInterfaceDecl *ID) {
|
|
std::string Name = "\01L_OBJC_CLASS_" + ID->getNameAsString();
|
|
|
|
if (llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name,
|
|
true)) {
|
|
assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
|
|
"Forward class metadata reference has incorrect type.");
|
|
return GV;
|
|
} else {
|
|
return new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
Name);
|
|
}
|
|
}
|
|
|
|
/*
|
|
struct objc_class_ext {
|
|
uint32_t size;
|
|
const char *weak_ivar_layout;
|
|
struct _objc_property_list *properties;
|
|
};
|
|
*/
|
|
llvm::Constant *
|
|
CGObjCMac::EmitClassExtension(const ObjCImplementationDecl *ID) {
|
|
uint64_t Size =
|
|
CGM.getTargetData().getTypeAllocSize(ObjCTypes.ClassExtensionTy);
|
|
|
|
llvm::Constant *Values[3];
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
Values[1] = BuildIvarLayout(ID, false);
|
|
Values[2] = EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ID->getName(),
|
|
ID, ID->getClassInterface(), ObjCTypes);
|
|
|
|
// Return null if no extension bits are used.
|
|
if (Values[1]->isNullValue() && Values[2]->isNullValue())
|
|
return llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy);
|
|
|
|
llvm::Constant *Init =
|
|
llvm::ConstantStruct::get(ObjCTypes.ClassExtensionTy, Values);
|
|
return CreateMetadataVar("\01L_OBJC_CLASSEXT_" + ID->getName(),
|
|
Init, "__OBJC,__class_ext,regular,no_dead_strip",
|
|
4, true);
|
|
}
|
|
|
|
/*
|
|
struct objc_ivar {
|
|
char *ivar_name;
|
|
char *ivar_type;
|
|
int ivar_offset;
|
|
};
|
|
|
|
struct objc_ivar_list {
|
|
int ivar_count;
|
|
struct objc_ivar list[count];
|
|
};
|
|
*/
|
|
llvm::Constant *CGObjCMac::EmitIvarList(const ObjCImplementationDecl *ID,
|
|
bool ForClass) {
|
|
std::vector<llvm::Constant*> Ivars;
|
|
|
|
// When emitting the root class GCC emits ivar entries for the
|
|
// actual class structure. It is not clear if we need to follow this
|
|
// behavior; for now lets try and get away with not doing it. If so,
|
|
// the cleanest solution would be to make up an ObjCInterfaceDecl
|
|
// for the class.
|
|
if (ForClass)
|
|
return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy);
|
|
|
|
const ObjCInterfaceDecl *OID = ID->getClassInterface();
|
|
|
|
for (const ObjCIvarDecl *IVD = OID->all_declared_ivar_begin();
|
|
IVD; IVD = IVD->getNextIvar()) {
|
|
// Ignore unnamed bit-fields.
|
|
if (!IVD->getDeclName())
|
|
continue;
|
|
llvm::Constant *Ivar[] = {
|
|
GetMethodVarName(IVD->getIdentifier()),
|
|
GetMethodVarType(IVD),
|
|
llvm::ConstantInt::get(ObjCTypes.IntTy,
|
|
ComputeIvarBaseOffset(CGM, OID, IVD))
|
|
};
|
|
Ivars.push_back(llvm::ConstantStruct::get(ObjCTypes.IvarTy, Ivar));
|
|
}
|
|
|
|
// Return null for empty list.
|
|
if (Ivars.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy);
|
|
|
|
llvm::Constant *Values[2];
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Ivars.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.IvarTy,
|
|
Ivars.size());
|
|
Values[1] = llvm::ConstantArray::get(AT, Ivars);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV;
|
|
if (ForClass)
|
|
GV = CreateMetadataVar("\01L_OBJC_CLASS_VARIABLES_" + ID->getName(),
|
|
Init, "__OBJC,__class_vars,regular,no_dead_strip",
|
|
4, true);
|
|
else
|
|
GV = CreateMetadataVar("\01L_OBJC_INSTANCE_VARIABLES_" + ID->getName(),
|
|
Init, "__OBJC,__instance_vars,regular,no_dead_strip",
|
|
4, true);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListPtrTy);
|
|
}
|
|
|
|
/*
|
|
struct objc_method {
|
|
SEL method_name;
|
|
char *method_types;
|
|
void *method;
|
|
};
|
|
|
|
struct objc_method_list {
|
|
struct objc_method_list *obsolete;
|
|
int count;
|
|
struct objc_method methods_list[count];
|
|
};
|
|
*/
|
|
|
|
/// GetMethodConstant - Return a struct objc_method constant for the
|
|
/// given method if it has been defined. The result is null if the
|
|
/// method has not been defined. The return value has type MethodPtrTy.
|
|
llvm::Constant *CGObjCMac::GetMethodConstant(const ObjCMethodDecl *MD) {
|
|
llvm::Function *Fn = GetMethodDefinition(MD);
|
|
if (!Fn)
|
|
return 0;
|
|
|
|
llvm::Constant *Method[] = {
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()),
|
|
ObjCTypes.SelectorPtrTy),
|
|
GetMethodVarType(MD),
|
|
llvm::ConstantExpr::getBitCast(Fn, ObjCTypes.Int8PtrTy)
|
|
};
|
|
return llvm::ConstantStruct::get(ObjCTypes.MethodTy, Method);
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EmitMethodList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods) {
|
|
// Return null for empty list.
|
|
if (Methods.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.MethodListPtrTy);
|
|
|
|
llvm::Constant *Values[3];
|
|
Values[0] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
|
|
Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Methods.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.MethodTy,
|
|
Methods.size());
|
|
Values[2] = llvm::ConstantArray::get(AT, Methods);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV = CreateMetadataVar(Name, Init, Section, 4, true);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListPtrTy);
|
|
}
|
|
|
|
llvm::Function *CGObjCCommonMac::GenerateMethod(const ObjCMethodDecl *OMD,
|
|
const ObjCContainerDecl *CD) {
|
|
llvm::SmallString<256> Name;
|
|
GetNameForMethod(OMD, CD, Name);
|
|
|
|
CodeGenTypes &Types = CGM.getTypes();
|
|
llvm::FunctionType *MethodTy =
|
|
Types.GetFunctionType(Types.getFunctionInfo(OMD), OMD->isVariadic());
|
|
llvm::Function *Method =
|
|
llvm::Function::Create(MethodTy,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Name.str(),
|
|
&CGM.getModule());
|
|
MethodDefinitions.insert(std::make_pair(OMD, Method));
|
|
|
|
return Method;
|
|
}
|
|
|
|
llvm::GlobalVariable *
|
|
CGObjCCommonMac::CreateMetadataVar(Twine Name,
|
|
llvm::Constant *Init,
|
|
const char *Section,
|
|
unsigned Align,
|
|
bool AddToUsed) {
|
|
llvm::Type *Ty = Init->getType();
|
|
llvm::GlobalVariable *GV =
|
|
new llvm::GlobalVariable(CGM.getModule(), Ty, false,
|
|
llvm::GlobalValue::InternalLinkage, Init, Name);
|
|
if (Section)
|
|
GV->setSection(Section);
|
|
if (Align)
|
|
GV->setAlignment(Align);
|
|
if (AddToUsed)
|
|
CGM.AddUsedGlobal(GV);
|
|
return GV;
|
|
}
|
|
|
|
llvm::Function *CGObjCMac::ModuleInitFunction() {
|
|
// Abuse this interface function as a place to finalize.
|
|
FinishModule();
|
|
return NULL;
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::GetPropertyGetFunction() {
|
|
return ObjCTypes.getGetPropertyFn();
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::GetPropertySetFunction() {
|
|
return ObjCTypes.getSetPropertyFn();
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::GetGetStructFunction() {
|
|
return ObjCTypes.getCopyStructFn();
|
|
}
|
|
llvm::Constant *CGObjCMac::GetSetStructFunction() {
|
|
return ObjCTypes.getCopyStructFn();
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EnumerationMutationFunction() {
|
|
return ObjCTypes.getEnumerationMutationFn();
|
|
}
|
|
|
|
void CGObjCMac::EmitTryStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S) {
|
|
return EmitTryOrSynchronizedStmt(CGF, S);
|
|
}
|
|
|
|
void CGObjCMac::EmitSynchronizedStmt(CodeGenFunction &CGF,
|
|
const ObjCAtSynchronizedStmt &S) {
|
|
return EmitTryOrSynchronizedStmt(CGF, S);
|
|
}
|
|
|
|
namespace {
|
|
struct PerformFragileFinally : EHScopeStack::Cleanup {
|
|
const Stmt &S;
|
|
llvm::Value *SyncArgSlot;
|
|
llvm::Value *CallTryExitVar;
|
|
llvm::Value *ExceptionData;
|
|
ObjCTypesHelper &ObjCTypes;
|
|
PerformFragileFinally(const Stmt *S,
|
|
llvm::Value *SyncArgSlot,
|
|
llvm::Value *CallTryExitVar,
|
|
llvm::Value *ExceptionData,
|
|
ObjCTypesHelper *ObjCTypes)
|
|
: S(*S), SyncArgSlot(SyncArgSlot), CallTryExitVar(CallTryExitVar),
|
|
ExceptionData(ExceptionData), ObjCTypes(*ObjCTypes) {}
|
|
|
|
void Emit(CodeGenFunction &CGF, Flags flags) {
|
|
// Check whether we need to call objc_exception_try_exit.
|
|
// In optimized code, this branch will always be folded.
|
|
llvm::BasicBlock *FinallyCallExit =
|
|
CGF.createBasicBlock("finally.call_exit");
|
|
llvm::BasicBlock *FinallyNoCallExit =
|
|
CGF.createBasicBlock("finally.no_call_exit");
|
|
CGF.Builder.CreateCondBr(CGF.Builder.CreateLoad(CallTryExitVar),
|
|
FinallyCallExit, FinallyNoCallExit);
|
|
|
|
CGF.EmitBlock(FinallyCallExit);
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryExitFn(), ExceptionData)
|
|
->setDoesNotThrow();
|
|
|
|
CGF.EmitBlock(FinallyNoCallExit);
|
|
|
|
if (isa<ObjCAtTryStmt>(S)) {
|
|
if (const ObjCAtFinallyStmt* FinallyStmt =
|
|
cast<ObjCAtTryStmt>(S).getFinallyStmt()) {
|
|
// Save the current cleanup destination in case there's
|
|
// control flow inside the finally statement.
|
|
llvm::Value *CurCleanupDest =
|
|
CGF.Builder.CreateLoad(CGF.getNormalCleanupDestSlot());
|
|
|
|
CGF.EmitStmt(FinallyStmt->getFinallyBody());
|
|
|
|
if (CGF.HaveInsertPoint()) {
|
|
CGF.Builder.CreateStore(CurCleanupDest,
|
|
CGF.getNormalCleanupDestSlot());
|
|
} else {
|
|
// Currently, the end of the cleanup must always exist.
|
|
CGF.EnsureInsertPoint();
|
|
}
|
|
}
|
|
} else {
|
|
// Emit objc_sync_exit(expr); as finally's sole statement for
|
|
// @synchronized.
|
|
llvm::Value *SyncArg = CGF.Builder.CreateLoad(SyncArgSlot);
|
|
CGF.Builder.CreateCall(ObjCTypes.getSyncExitFn(), SyncArg)
|
|
->setDoesNotThrow();
|
|
}
|
|
}
|
|
};
|
|
|
|
class FragileHazards {
|
|
CodeGenFunction &CGF;
|
|
SmallVector<llvm::Value*, 20> Locals;
|
|
llvm::DenseSet<llvm::BasicBlock*> BlocksBeforeTry;
|
|
|
|
llvm::InlineAsm *ReadHazard;
|
|
llvm::InlineAsm *WriteHazard;
|
|
|
|
llvm::FunctionType *GetAsmFnType();
|
|
|
|
void collectLocals();
|
|
void emitReadHazard(CGBuilderTy &Builder);
|
|
|
|
public:
|
|
FragileHazards(CodeGenFunction &CGF);
|
|
|
|
void emitWriteHazard();
|
|
void emitHazardsInNewBlocks();
|
|
};
|
|
}
|
|
|
|
/// Create the fragile-ABI read and write hazards based on the current
|
|
/// state of the function, which is presumed to be immediately prior
|
|
/// to a @try block. These hazards are used to maintain correct
|
|
/// semantics in the face of optimization and the fragile ABI's
|
|
/// cavalier use of setjmp/longjmp.
|
|
FragileHazards::FragileHazards(CodeGenFunction &CGF) : CGF(CGF) {
|
|
collectLocals();
|
|
|
|
if (Locals.empty()) return;
|
|
|
|
// Collect all the blocks in the function.
|
|
for (llvm::Function::iterator
|
|
I = CGF.CurFn->begin(), E = CGF.CurFn->end(); I != E; ++I)
|
|
BlocksBeforeTry.insert(&*I);
|
|
|
|
llvm::FunctionType *AsmFnTy = GetAsmFnType();
|
|
|
|
// Create a read hazard for the allocas. This inhibits dead-store
|
|
// optimizations and forces the values to memory. This hazard is
|
|
// inserted before any 'throwing' calls in the protected scope to
|
|
// reflect the possibility that the variables might be read from the
|
|
// catch block if the call throws.
|
|
{
|
|
std::string Constraint;
|
|
for (unsigned I = 0, E = Locals.size(); I != E; ++I) {
|
|
if (I) Constraint += ',';
|
|
Constraint += "*m";
|
|
}
|
|
|
|
ReadHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false);
|
|
}
|
|
|
|
// Create a write hazard for the allocas. This inhibits folding
|
|
// loads across the hazard. This hazard is inserted at the
|
|
// beginning of the catch path to reflect the possibility that the
|
|
// variables might have been written within the protected scope.
|
|
{
|
|
std::string Constraint;
|
|
for (unsigned I = 0, E = Locals.size(); I != E; ++I) {
|
|
if (I) Constraint += ',';
|
|
Constraint += "=*m";
|
|
}
|
|
|
|
WriteHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false);
|
|
}
|
|
}
|
|
|
|
/// Emit a write hazard at the current location.
|
|
void FragileHazards::emitWriteHazard() {
|
|
if (Locals.empty()) return;
|
|
|
|
CGF.Builder.CreateCall(WriteHazard, Locals)->setDoesNotThrow();
|
|
}
|
|
|
|
void FragileHazards::emitReadHazard(CGBuilderTy &Builder) {
|
|
assert(!Locals.empty());
|
|
Builder.CreateCall(ReadHazard, Locals)->setDoesNotThrow();
|
|
}
|
|
|
|
/// Emit read hazards in all the protected blocks, i.e. all the blocks
|
|
/// which have been inserted since the beginning of the try.
|
|
void FragileHazards::emitHazardsInNewBlocks() {
|
|
if (Locals.empty()) return;
|
|
|
|
CGBuilderTy Builder(CGF.getLLVMContext());
|
|
|
|
// Iterate through all blocks, skipping those prior to the try.
|
|
for (llvm::Function::iterator
|
|
FI = CGF.CurFn->begin(), FE = CGF.CurFn->end(); FI != FE; ++FI) {
|
|
llvm::BasicBlock &BB = *FI;
|
|
if (BlocksBeforeTry.count(&BB)) continue;
|
|
|
|
// Walk through all the calls in the block.
|
|
for (llvm::BasicBlock::iterator
|
|
BI = BB.begin(), BE = BB.end(); BI != BE; ++BI) {
|
|
llvm::Instruction &I = *BI;
|
|
|
|
// Ignore instructions that aren't non-intrinsic calls.
|
|
// These are the only calls that can possibly call longjmp.
|
|
if (!isa<llvm::CallInst>(I) && !isa<llvm::InvokeInst>(I)) continue;
|
|
if (isa<llvm::IntrinsicInst>(I))
|
|
continue;
|
|
|
|
// Ignore call sites marked nounwind. This may be questionable,
|
|
// since 'nounwind' doesn't necessarily mean 'does not call longjmp'.
|
|
llvm::CallSite CS(&I);
|
|
if (CS.doesNotThrow()) continue;
|
|
|
|
// Insert a read hazard before the call. This will ensure that
|
|
// any writes to the locals are performed before making the
|
|
// call. If the call throws, then this is sufficient to
|
|
// guarantee correctness as long as it doesn't also write to any
|
|
// locals.
|
|
Builder.SetInsertPoint(&BB, BI);
|
|
emitReadHazard(Builder);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void addIfPresent(llvm::DenseSet<llvm::Value*> &S, llvm::Value *V) {
|
|
if (V) S.insert(V);
|
|
}
|
|
|
|
void FragileHazards::collectLocals() {
|
|
// Compute a set of allocas to ignore.
|
|
llvm::DenseSet<llvm::Value*> AllocasToIgnore;
|
|
addIfPresent(AllocasToIgnore, CGF.ReturnValue);
|
|
addIfPresent(AllocasToIgnore, CGF.NormalCleanupDest);
|
|
|
|
// Collect all the allocas currently in the function. This is
|
|
// probably way too aggressive.
|
|
llvm::BasicBlock &Entry = CGF.CurFn->getEntryBlock();
|
|
for (llvm::BasicBlock::iterator
|
|
I = Entry.begin(), E = Entry.end(); I != E; ++I)
|
|
if (isa<llvm::AllocaInst>(*I) && !AllocasToIgnore.count(&*I))
|
|
Locals.push_back(&*I);
|
|
}
|
|
|
|
llvm::FunctionType *FragileHazards::GetAsmFnType() {
|
|
SmallVector<llvm::Type *, 16> tys(Locals.size());
|
|
for (unsigned i = 0, e = Locals.size(); i != e; ++i)
|
|
tys[i] = Locals[i]->getType();
|
|
return llvm::FunctionType::get(CGF.VoidTy, tys, false);
|
|
}
|
|
|
|
/*
|
|
|
|
Objective-C setjmp-longjmp (sjlj) Exception Handling
|
|
--
|
|
|
|
A catch buffer is a setjmp buffer plus:
|
|
- a pointer to the exception that was caught
|
|
- a pointer to the previous exception data buffer
|
|
- two pointers of reserved storage
|
|
Therefore catch buffers form a stack, with a pointer to the top
|
|
of the stack kept in thread-local storage.
|
|
|
|
objc_exception_try_enter pushes a catch buffer onto the EH stack.
|
|
objc_exception_try_exit pops the given catch buffer, which is
|
|
required to be the top of the EH stack.
|
|
objc_exception_throw pops the top of the EH stack, writes the
|
|
thrown exception into the appropriate field, and longjmps
|
|
to the setjmp buffer. It crashes the process (with a printf
|
|
and an abort()) if there are no catch buffers on the stack.
|
|
objc_exception_extract just reads the exception pointer out of the
|
|
catch buffer.
|
|
|
|
There's no reason an implementation couldn't use a light-weight
|
|
setjmp here --- something like __builtin_setjmp, but API-compatible
|
|
with the heavyweight setjmp. This will be more important if we ever
|
|
want to implement correct ObjC/C++ exception interactions for the
|
|
fragile ABI.
|
|
|
|
Note that for this use of setjmp/longjmp to be correct, we may need
|
|
to mark some local variables volatile: if a non-volatile local
|
|
variable is modified between the setjmp and the longjmp, it has
|
|
indeterminate value. For the purposes of LLVM IR, it may be
|
|
sufficient to make loads and stores within the @try (to variables
|
|
declared outside the @try) volatile. This is necessary for
|
|
optimized correctness, but is not currently being done; this is
|
|
being tracked as rdar://problem/8160285
|
|
|
|
The basic framework for a @try-catch-finally is as follows:
|
|
{
|
|
objc_exception_data d;
|
|
id _rethrow = null;
|
|
bool _call_try_exit = true;
|
|
|
|
objc_exception_try_enter(&d);
|
|
if (!setjmp(d.jmp_buf)) {
|
|
... try body ...
|
|
} else {
|
|
// exception path
|
|
id _caught = objc_exception_extract(&d);
|
|
|
|
// enter new try scope for handlers
|
|
if (!setjmp(d.jmp_buf)) {
|
|
... match exception and execute catch blocks ...
|
|
|
|
// fell off end, rethrow.
|
|
_rethrow = _caught;
|
|
... jump-through-finally to finally_rethrow ...
|
|
} else {
|
|
// exception in catch block
|
|
_rethrow = objc_exception_extract(&d);
|
|
_call_try_exit = false;
|
|
... jump-through-finally to finally_rethrow ...
|
|
}
|
|
}
|
|
... jump-through-finally to finally_end ...
|
|
|
|
finally:
|
|
if (_call_try_exit)
|
|
objc_exception_try_exit(&d);
|
|
|
|
... finally block ....
|
|
... dispatch to finally destination ...
|
|
|
|
finally_rethrow:
|
|
objc_exception_throw(_rethrow);
|
|
|
|
finally_end:
|
|
}
|
|
|
|
This framework differs slightly from the one gcc uses, in that gcc
|
|
uses _rethrow to determine if objc_exception_try_exit should be called
|
|
and if the object should be rethrown. This breaks in the face of
|
|
throwing nil and introduces unnecessary branches.
|
|
|
|
We specialize this framework for a few particular circumstances:
|
|
|
|
- If there are no catch blocks, then we avoid emitting the second
|
|
exception handling context.
|
|
|
|
- If there is a catch-all catch block (i.e. @catch(...) or @catch(id
|
|
e)) we avoid emitting the code to rethrow an uncaught exception.
|
|
|
|
- FIXME: If there is no @finally block we can do a few more
|
|
simplifications.
|
|
|
|
Rethrows and Jumps-Through-Finally
|
|
--
|
|
|
|
'@throw;' is supported by pushing the currently-caught exception
|
|
onto ObjCEHStack while the @catch blocks are emitted.
|
|
|
|
Branches through the @finally block are handled with an ordinary
|
|
normal cleanup. We do not register an EH cleanup; fragile-ABI ObjC
|
|
exceptions are not compatible with C++ exceptions, and this is
|
|
hardly the only place where this will go wrong.
|
|
|
|
@synchronized(expr) { stmt; } is emitted as if it were:
|
|
id synch_value = expr;
|
|
objc_sync_enter(synch_value);
|
|
@try { stmt; } @finally { objc_sync_exit(synch_value); }
|
|
*/
|
|
|
|
void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
|
|
const Stmt &S) {
|
|
bool isTry = isa<ObjCAtTryStmt>(S);
|
|
|
|
// A destination for the fall-through edges of the catch handlers to
|
|
// jump to.
|
|
CodeGenFunction::JumpDest FinallyEnd =
|
|
CGF.getJumpDestInCurrentScope("finally.end");
|
|
|
|
// A destination for the rethrow edge of the catch handlers to jump
|
|
// to.
|
|
CodeGenFunction::JumpDest FinallyRethrow =
|
|
CGF.getJumpDestInCurrentScope("finally.rethrow");
|
|
|
|
// For @synchronized, call objc_sync_enter(sync.expr). The
|
|
// evaluation of the expression must occur before we enter the
|
|
// @synchronized. We can't avoid a temp here because we need the
|
|
// value to be preserved. If the backend ever does liveness
|
|
// correctly after setjmp, this will be unnecessary.
|
|
llvm::Value *SyncArgSlot = 0;
|
|
if (!isTry) {
|
|
llvm::Value *SyncArg =
|
|
CGF.EmitScalarExpr(cast<ObjCAtSynchronizedStmt>(S).getSynchExpr());
|
|
SyncArg = CGF.Builder.CreateBitCast(SyncArg, ObjCTypes.ObjectPtrTy);
|
|
CGF.Builder.CreateCall(ObjCTypes.getSyncEnterFn(), SyncArg)
|
|
->setDoesNotThrow();
|
|
|
|
SyncArgSlot = CGF.CreateTempAlloca(SyncArg->getType(), "sync.arg");
|
|
CGF.Builder.CreateStore(SyncArg, SyncArgSlot);
|
|
}
|
|
|
|
// Allocate memory for the setjmp buffer. This needs to be kept
|
|
// live throughout the try and catch blocks.
|
|
llvm::Value *ExceptionData = CGF.CreateTempAlloca(ObjCTypes.ExceptionDataTy,
|
|
"exceptiondata.ptr");
|
|
|
|
// Create the fragile hazards. Note that this will not capture any
|
|
// of the allocas required for exception processing, but will
|
|
// capture the current basic block (which extends all the way to the
|
|
// setjmp call) as "before the @try".
|
|
FragileHazards Hazards(CGF);
|
|
|
|
// Create a flag indicating whether the cleanup needs to call
|
|
// objc_exception_try_exit. This is true except when
|
|
// - no catches match and we're branching through the cleanup
|
|
// just to rethrow the exception, or
|
|
// - a catch matched and we're falling out of the catch handler.
|
|
// The setjmp-safety rule here is that we should always store to this
|
|
// variable in a place that dominates the branch through the cleanup
|
|
// without passing through any setjmps.
|
|
llvm::Value *CallTryExitVar = CGF.CreateTempAlloca(CGF.Builder.getInt1Ty(),
|
|
"_call_try_exit");
|
|
|
|
// A slot containing the exception to rethrow. Only needed when we
|
|
// have both a @catch and a @finally.
|
|
llvm::Value *PropagatingExnVar = 0;
|
|
|
|
// Push a normal cleanup to leave the try scope.
|
|
CGF.EHStack.pushCleanup<PerformFragileFinally>(NormalCleanup, &S,
|
|
SyncArgSlot,
|
|
CallTryExitVar,
|
|
ExceptionData,
|
|
&ObjCTypes);
|
|
|
|
// Enter a try block:
|
|
// - Call objc_exception_try_enter to push ExceptionData on top of
|
|
// the EH stack.
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryEnterFn(), ExceptionData)
|
|
->setDoesNotThrow();
|
|
|
|
// - Call setjmp on the exception data buffer.
|
|
llvm::Constant *Zero = llvm::ConstantInt::get(CGF.Builder.getInt32Ty(), 0);
|
|
llvm::Value *GEPIndexes[] = { Zero, Zero, Zero };
|
|
llvm::Value *SetJmpBuffer =
|
|
CGF.Builder.CreateGEP(ExceptionData, GEPIndexes, "setjmp_buffer");
|
|
llvm::CallInst *SetJmpResult =
|
|
CGF.Builder.CreateCall(ObjCTypes.getSetJmpFn(), SetJmpBuffer, "setjmp_result");
|
|
SetJmpResult->setDoesNotThrow();
|
|
|
|
// If setjmp returned 0, enter the protected block; otherwise,
|
|
// branch to the handler.
|
|
llvm::BasicBlock *TryBlock = CGF.createBasicBlock("try");
|
|
llvm::BasicBlock *TryHandler = CGF.createBasicBlock("try.handler");
|
|
llvm::Value *DidCatch =
|
|
CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception");
|
|
CGF.Builder.CreateCondBr(DidCatch, TryHandler, TryBlock);
|
|
|
|
// Emit the protected block.
|
|
CGF.EmitBlock(TryBlock);
|
|
CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar);
|
|
CGF.EmitStmt(isTry ? cast<ObjCAtTryStmt>(S).getTryBody()
|
|
: cast<ObjCAtSynchronizedStmt>(S).getSynchBody());
|
|
|
|
CGBuilderTy::InsertPoint TryFallthroughIP = CGF.Builder.saveAndClearIP();
|
|
|
|
// Emit the exception handler block.
|
|
CGF.EmitBlock(TryHandler);
|
|
|
|
// Don't optimize loads of the in-scope locals across this point.
|
|
Hazards.emitWriteHazard();
|
|
|
|
// For a @synchronized (or a @try with no catches), just branch
|
|
// through the cleanup to the rethrow block.
|
|
if (!isTry || !cast<ObjCAtTryStmt>(S).getNumCatchStmts()) {
|
|
// Tell the cleanup not to re-pop the exit.
|
|
CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar);
|
|
CGF.EmitBranchThroughCleanup(FinallyRethrow);
|
|
|
|
// Otherwise, we have to match against the caught exceptions.
|
|
} else {
|
|
// Retrieve the exception object. We may emit multiple blocks but
|
|
// nothing can cross this so the value is already in SSA form.
|
|
llvm::CallInst *Caught =
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionExtractFn(),
|
|
ExceptionData, "caught");
|
|
Caught->setDoesNotThrow();
|
|
|
|
// Push the exception to rethrow onto the EH value stack for the
|
|
// benefit of any @throws in the handlers.
|
|
CGF.ObjCEHValueStack.push_back(Caught);
|
|
|
|
const ObjCAtTryStmt* AtTryStmt = cast<ObjCAtTryStmt>(&S);
|
|
|
|
bool HasFinally = (AtTryStmt->getFinallyStmt() != 0);
|
|
|
|
llvm::BasicBlock *CatchBlock = 0;
|
|
llvm::BasicBlock *CatchHandler = 0;
|
|
if (HasFinally) {
|
|
// Save the currently-propagating exception before
|
|
// objc_exception_try_enter clears the exception slot.
|
|
PropagatingExnVar = CGF.CreateTempAlloca(Caught->getType(),
|
|
"propagating_exception");
|
|
CGF.Builder.CreateStore(Caught, PropagatingExnVar);
|
|
|
|
// Enter a new exception try block (in case a @catch block
|
|
// throws an exception).
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionTryEnterFn(), ExceptionData)
|
|
->setDoesNotThrow();
|
|
|
|
llvm::CallInst *SetJmpResult =
|
|
CGF.Builder.CreateCall(ObjCTypes.getSetJmpFn(), SetJmpBuffer,
|
|
"setjmp.result");
|
|
SetJmpResult->setDoesNotThrow();
|
|
|
|
llvm::Value *Threw =
|
|
CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception");
|
|
|
|
CatchBlock = CGF.createBasicBlock("catch");
|
|
CatchHandler = CGF.createBasicBlock("catch_for_catch");
|
|
CGF.Builder.CreateCondBr(Threw, CatchHandler, CatchBlock);
|
|
|
|
CGF.EmitBlock(CatchBlock);
|
|
}
|
|
|
|
CGF.Builder.CreateStore(CGF.Builder.getInt1(HasFinally), CallTryExitVar);
|
|
|
|
// Handle catch list. As a special case we check if everything is
|
|
// matched and avoid generating code for falling off the end if
|
|
// so.
|
|
bool AllMatched = false;
|
|
for (unsigned I = 0, N = AtTryStmt->getNumCatchStmts(); I != N; ++I) {
|
|
const ObjCAtCatchStmt *CatchStmt = AtTryStmt->getCatchStmt(I);
|
|
|
|
const VarDecl *CatchParam = CatchStmt->getCatchParamDecl();
|
|
const ObjCObjectPointerType *OPT = 0;
|
|
|
|
// catch(...) always matches.
|
|
if (!CatchParam) {
|
|
AllMatched = true;
|
|
} else {
|
|
OPT = CatchParam->getType()->getAs<ObjCObjectPointerType>();
|
|
|
|
// catch(id e) always matches under this ABI, since only
|
|
// ObjC exceptions end up here in the first place.
|
|
// FIXME: For the time being we also match id<X>; this should
|
|
// be rejected by Sema instead.
|
|
if (OPT && (OPT->isObjCIdType() || OPT->isObjCQualifiedIdType()))
|
|
AllMatched = true;
|
|
}
|
|
|
|
// If this is a catch-all, we don't need to test anything.
|
|
if (AllMatched) {
|
|
CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF);
|
|
|
|
if (CatchParam) {
|
|
CGF.EmitAutoVarDecl(*CatchParam);
|
|
assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?");
|
|
|
|
// These types work out because ConvertType(id) == i8*.
|
|
CGF.Builder.CreateStore(Caught, CGF.GetAddrOfLocalVar(CatchParam));
|
|
}
|
|
|
|
CGF.EmitStmt(CatchStmt->getCatchBody());
|
|
|
|
// The scope of the catch variable ends right here.
|
|
CatchVarCleanups.ForceCleanup();
|
|
|
|
CGF.EmitBranchThroughCleanup(FinallyEnd);
|
|
break;
|
|
}
|
|
|
|
assert(OPT && "Unexpected non-object pointer type in @catch");
|
|
const ObjCObjectType *ObjTy = OPT->getObjectType();
|
|
|
|
// FIXME: @catch (Class c) ?
|
|
ObjCInterfaceDecl *IDecl = ObjTy->getInterface();
|
|
assert(IDecl && "Catch parameter must have Objective-C type!");
|
|
|
|
// Check if the @catch block matches the exception object.
|
|
llvm::Value *Class = EmitClassRef(CGF.Builder, IDecl);
|
|
|
|
llvm::CallInst *Match =
|
|
CGF.Builder.CreateCall2(ObjCTypes.getExceptionMatchFn(),
|
|
Class, Caught, "match");
|
|
Match->setDoesNotThrow();
|
|
|
|
llvm::BasicBlock *MatchedBlock = CGF.createBasicBlock("match");
|
|
llvm::BasicBlock *NextCatchBlock = CGF.createBasicBlock("catch.next");
|
|
|
|
CGF.Builder.CreateCondBr(CGF.Builder.CreateIsNotNull(Match, "matched"),
|
|
MatchedBlock, NextCatchBlock);
|
|
|
|
// Emit the @catch block.
|
|
CGF.EmitBlock(MatchedBlock);
|
|
|
|
// Collect any cleanups for the catch variable. The scope lasts until
|
|
// the end of the catch body.
|
|
CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF);
|
|
|
|
CGF.EmitAutoVarDecl(*CatchParam);
|
|
assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?");
|
|
|
|
// Initialize the catch variable.
|
|
llvm::Value *Tmp =
|
|
CGF.Builder.CreateBitCast(Caught,
|
|
CGF.ConvertType(CatchParam->getType()));
|
|
CGF.Builder.CreateStore(Tmp, CGF.GetAddrOfLocalVar(CatchParam));
|
|
|
|
CGF.EmitStmt(CatchStmt->getCatchBody());
|
|
|
|
// We're done with the catch variable.
|
|
CatchVarCleanups.ForceCleanup();
|
|
|
|
CGF.EmitBranchThroughCleanup(FinallyEnd);
|
|
|
|
CGF.EmitBlock(NextCatchBlock);
|
|
}
|
|
|
|
CGF.ObjCEHValueStack.pop_back();
|
|
|
|
// If nothing wanted anything to do with the caught exception,
|
|
// kill the extract call.
|
|
if (Caught->use_empty())
|
|
Caught->eraseFromParent();
|
|
|
|
if (!AllMatched)
|
|
CGF.EmitBranchThroughCleanup(FinallyRethrow);
|
|
|
|
if (HasFinally) {
|
|
// Emit the exception handler for the @catch blocks.
|
|
CGF.EmitBlock(CatchHandler);
|
|
|
|
// In theory we might now need a write hazard, but actually it's
|
|
// unnecessary because there's no local-accessing code between
|
|
// the try's write hazard and here.
|
|
//Hazards.emitWriteHazard();
|
|
|
|
// Extract the new exception and save it to the
|
|
// propagating-exception slot.
|
|
assert(PropagatingExnVar);
|
|
llvm::CallInst *NewCaught =
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionExtractFn(),
|
|
ExceptionData, "caught");
|
|
NewCaught->setDoesNotThrow();
|
|
CGF.Builder.CreateStore(NewCaught, PropagatingExnVar);
|
|
|
|
// Don't pop the catch handler; the throw already did.
|
|
CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar);
|
|
CGF.EmitBranchThroughCleanup(FinallyRethrow);
|
|
}
|
|
}
|
|
|
|
// Insert read hazards as required in the new blocks.
|
|
Hazards.emitHazardsInNewBlocks();
|
|
|
|
// Pop the cleanup.
|
|
CGF.Builder.restoreIP(TryFallthroughIP);
|
|
if (CGF.HaveInsertPoint())
|
|
CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar);
|
|
CGF.PopCleanupBlock();
|
|
CGF.EmitBlock(FinallyEnd.getBlock(), true);
|
|
|
|
// Emit the rethrow block.
|
|
CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP();
|
|
CGF.EmitBlock(FinallyRethrow.getBlock(), true);
|
|
if (CGF.HaveInsertPoint()) {
|
|
// If we have a propagating-exception variable, check it.
|
|
llvm::Value *PropagatingExn;
|
|
if (PropagatingExnVar) {
|
|
PropagatingExn = CGF.Builder.CreateLoad(PropagatingExnVar);
|
|
|
|
// Otherwise, just look in the buffer for the exception to throw.
|
|
} else {
|
|
llvm::CallInst *Caught =
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionExtractFn(),
|
|
ExceptionData);
|
|
Caught->setDoesNotThrow();
|
|
PropagatingExn = Caught;
|
|
}
|
|
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionThrowFn(), PropagatingExn)
|
|
->setDoesNotThrow();
|
|
CGF.Builder.CreateUnreachable();
|
|
}
|
|
|
|
CGF.Builder.restoreIP(SavedIP);
|
|
}
|
|
|
|
void CGObjCMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtThrowStmt &S) {
|
|
llvm::Value *ExceptionAsObject;
|
|
|
|
if (const Expr *ThrowExpr = S.getThrowExpr()) {
|
|
llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr);
|
|
ExceptionAsObject =
|
|
CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy);
|
|
} else {
|
|
assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) &&
|
|
"Unexpected rethrow outside @catch block.");
|
|
ExceptionAsObject = CGF.ObjCEHValueStack.back();
|
|
}
|
|
|
|
CGF.Builder.CreateCall(ObjCTypes.getExceptionThrowFn(), ExceptionAsObject)
|
|
->setDoesNotReturn();
|
|
CGF.Builder.CreateUnreachable();
|
|
|
|
// Clear the insertion point to indicate we are in unreachable code.
|
|
CGF.Builder.ClearInsertionPoint();
|
|
}
|
|
|
|
/// EmitObjCWeakRead - Code gen for loading value of a __weak
|
|
/// object: objc_read_weak (id *src)
|
|
///
|
|
llvm::Value * CGObjCMac::EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *AddrWeakObj) {
|
|
llvm::Type* DestTy =
|
|
cast<llvm::PointerType>(AddrWeakObj->getType())->getElementType();
|
|
AddrWeakObj = CGF.Builder.CreateBitCast(AddrWeakObj,
|
|
ObjCTypes.PtrObjectPtrTy);
|
|
llvm::Value *read_weak = CGF.Builder.CreateCall(ObjCTypes.getGcReadWeakFn(),
|
|
AddrWeakObj, "weakread");
|
|
read_weak = CGF.Builder.CreateBitCast(read_weak, DestTy);
|
|
return read_weak;
|
|
}
|
|
|
|
/// EmitObjCWeakAssign - Code gen for assigning to a __weak object.
|
|
/// objc_assign_weak (id src, id *dst)
|
|
///
|
|
void CGObjCMac::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4) ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongLongTy);
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignWeakFn(),
|
|
src, dst, "weakassign");
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCGlobalAssign - Code gen for assigning to a __strong object.
|
|
/// objc_assign_global (id src, id *dst)
|
|
///
|
|
void CGObjCMac::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst,
|
|
bool threadlocal) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4) ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongLongTy);
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
if (!threadlocal)
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignGlobalFn(),
|
|
src, dst, "globalassign");
|
|
else
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignThreadLocalFn(),
|
|
src, dst, "threadlocalassign");
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
|
|
/// objc_assign_ivar (id src, id *dst, ptrdiff_t ivaroffset)
|
|
///
|
|
void CGObjCMac::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst,
|
|
llvm::Value *ivarOffset) {
|
|
assert(ivarOffset && "EmitObjCIvarAssign - ivarOffset is NULL");
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4) ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongLongTy);
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall3(ObjCTypes.getGcAssignIvarFn(),
|
|
src, dst, ivarOffset);
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCStrongCastAssign - Code gen for assigning to a __strong cast object.
|
|
/// objc_assign_strongCast (id src, id *dst)
|
|
///
|
|
void CGObjCMac::EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4) ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongLongTy);
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignStrongCastFn(),
|
|
src, dst, "weakassign");
|
|
return;
|
|
}
|
|
|
|
void CGObjCMac::EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *DestPtr,
|
|
llvm::Value *SrcPtr,
|
|
llvm::Value *size) {
|
|
SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, ObjCTypes.Int8PtrTy);
|
|
DestPtr = CGF.Builder.CreateBitCast(DestPtr, ObjCTypes.Int8PtrTy);
|
|
CGF.Builder.CreateCall3(ObjCTypes.GcMemmoveCollectableFn(),
|
|
DestPtr, SrcPtr, size);
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCValueForIvar - Code Gen for ivar reference.
|
|
///
|
|
LValue CGObjCMac::EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF,
|
|
QualType ObjectTy,
|
|
llvm::Value *BaseValue,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned CVRQualifiers) {
|
|
const ObjCInterfaceDecl *ID =
|
|
ObjectTy->getAs<ObjCObjectType>()->getInterface();
|
|
return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers,
|
|
EmitIvarOffset(CGF, ID, Ivar));
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCInterfaceDecl *Interface,
|
|
const ObjCIvarDecl *Ivar) {
|
|
uint64_t Offset = ComputeIvarBaseOffset(CGM, Interface, Ivar);
|
|
return llvm::ConstantInt::get(
|
|
CGM.getTypes().ConvertType(CGM.getContext().LongTy),
|
|
Offset);
|
|
}
|
|
|
|
/* *** Private Interface *** */
|
|
|
|
/// EmitImageInfo - Emit the image info marker used to encode some module
|
|
/// level information.
|
|
///
|
|
/// See: <rdr://4810609&4810587&4810587>
|
|
/// struct IMAGE_INFO {
|
|
/// unsigned version;
|
|
/// unsigned flags;
|
|
/// };
|
|
enum ImageInfoFlags {
|
|
eImageInfo_FixAndContinue = (1 << 0),
|
|
eImageInfo_GarbageCollected = (1 << 1),
|
|
eImageInfo_GCOnly = (1 << 2),
|
|
eImageInfo_OptimizedByDyld = (1 << 3), // FIXME: When is this set.
|
|
|
|
// A flag indicating that the module has no instances of a @synthesize of a
|
|
// superclass variable. <rdar://problem/6803242>
|
|
eImageInfo_CorrectedSynthesize = (1 << 4)
|
|
};
|
|
|
|
void CGObjCCommonMac::EmitImageInfo() {
|
|
unsigned version = 0; // Version is unused?
|
|
unsigned flags = 0;
|
|
|
|
// FIXME: Fix and continue?
|
|
if (CGM.getLangOptions().getGC() != LangOptions::NonGC)
|
|
flags |= eImageInfo_GarbageCollected;
|
|
if (CGM.getLangOptions().getGC() == LangOptions::GCOnly)
|
|
flags |= eImageInfo_GCOnly;
|
|
|
|
// We never allow @synthesize of a superclass property.
|
|
flags |= eImageInfo_CorrectedSynthesize;
|
|
|
|
llvm::Type *Int32Ty = llvm::Type::getInt32Ty(VMContext);
|
|
|
|
// Emitted as int[2];
|
|
llvm::Constant *values[2] = {
|
|
llvm::ConstantInt::get(Int32Ty, version),
|
|
llvm::ConstantInt::get(Int32Ty, flags)
|
|
};
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(Int32Ty, 2);
|
|
|
|
const char *Section;
|
|
if (ObjCABI == 1)
|
|
Section = "__OBJC, __image_info,regular";
|
|
else
|
|
Section = "__DATA, __objc_imageinfo, regular, no_dead_strip";
|
|
llvm::GlobalVariable *GV =
|
|
CreateMetadataVar("\01L_OBJC_IMAGE_INFO",
|
|
llvm::ConstantArray::get(AT, values),
|
|
Section,
|
|
0,
|
|
true);
|
|
GV->setConstant(true);
|
|
}
|
|
|
|
|
|
// struct objc_module {
|
|
// unsigned long version;
|
|
// unsigned long size;
|
|
// const char *name;
|
|
// Symtab symtab;
|
|
// };
|
|
|
|
// FIXME: Get from somewhere
|
|
static const int ModuleVersion = 7;
|
|
|
|
void CGObjCMac::EmitModuleInfo() {
|
|
uint64_t Size = CGM.getTargetData().getTypeAllocSize(ObjCTypes.ModuleTy);
|
|
|
|
llvm::Constant *Values[] = {
|
|
llvm::ConstantInt::get(ObjCTypes.LongTy, ModuleVersion),
|
|
llvm::ConstantInt::get(ObjCTypes.LongTy, Size),
|
|
// This used to be the filename, now it is unused. <rdr://4327263>
|
|
GetClassName(&CGM.getContext().Idents.get("")),
|
|
EmitModuleSymbols()
|
|
};
|
|
CreateMetadataVar("\01L_OBJC_MODULES",
|
|
llvm::ConstantStruct::get(ObjCTypes.ModuleTy, Values),
|
|
"__OBJC,__module_info,regular,no_dead_strip",
|
|
4, true);
|
|
}
|
|
|
|
llvm::Constant *CGObjCMac::EmitModuleSymbols() {
|
|
unsigned NumClasses = DefinedClasses.size();
|
|
unsigned NumCategories = DefinedCategories.size();
|
|
|
|
// Return null if no symbols were defined.
|
|
if (!NumClasses && !NumCategories)
|
|
return llvm::Constant::getNullValue(ObjCTypes.SymtabPtrTy);
|
|
|
|
llvm::Constant *Values[5];
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.LongTy, 0);
|
|
Values[1] = llvm::Constant::getNullValue(ObjCTypes.SelectorPtrTy);
|
|
Values[2] = llvm::ConstantInt::get(ObjCTypes.ShortTy, NumClasses);
|
|
Values[3] = llvm::ConstantInt::get(ObjCTypes.ShortTy, NumCategories);
|
|
|
|
// The runtime expects exactly the list of defined classes followed
|
|
// by the list of defined categories, in a single array.
|
|
std::vector<llvm::Constant*> Symbols(NumClasses + NumCategories);
|
|
for (unsigned i=0; i<NumClasses; i++)
|
|
Symbols[i] = llvm::ConstantExpr::getBitCast(DefinedClasses[i],
|
|
ObjCTypes.Int8PtrTy);
|
|
for (unsigned i=0; i<NumCategories; i++)
|
|
Symbols[NumClasses + i] =
|
|
llvm::ConstantExpr::getBitCast(DefinedCategories[i],
|
|
ObjCTypes.Int8PtrTy);
|
|
|
|
Values[4] =
|
|
llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.Int8PtrTy,
|
|
NumClasses + NumCategories),
|
|
Symbols);
|
|
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV =
|
|
CreateMetadataVar("\01L_OBJC_SYMBOLS", Init,
|
|
"__OBJC,__symbols,regular,no_dead_strip",
|
|
4, true);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.SymtabPtrTy);
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitClassRefFromId(CGBuilderTy &Builder,
|
|
IdentifierInfo *II) {
|
|
LazySymbols.insert(II);
|
|
|
|
llvm::GlobalVariable *&Entry = ClassReferences[II];
|
|
|
|
if (!Entry) {
|
|
llvm::Constant *Casted =
|
|
llvm::ConstantExpr::getBitCast(GetClassName(II),
|
|
ObjCTypes.ClassPtrTy);
|
|
Entry =
|
|
CreateMetadataVar("\01L_OBJC_CLASS_REFERENCES_", Casted,
|
|
"__OBJC,__cls_refs,literal_pointers,no_dead_strip",
|
|
4, true);
|
|
}
|
|
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
return EmitClassRefFromId(Builder, ID->getIdentifier());
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitNSAutoreleasePoolClassRef(CGBuilderTy &Builder) {
|
|
IdentifierInfo *II = &CGM.getContext().Idents.get("NSAutoreleasePool");
|
|
return EmitClassRefFromId(Builder, II);
|
|
}
|
|
|
|
llvm::Value *CGObjCMac::EmitSelector(CGBuilderTy &Builder, Selector Sel,
|
|
bool lvalue) {
|
|
llvm::GlobalVariable *&Entry = SelectorReferences[Sel];
|
|
|
|
if (!Entry) {
|
|
llvm::Constant *Casted =
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel),
|
|
ObjCTypes.SelectorPtrTy);
|
|
Entry =
|
|
CreateMetadataVar("\01L_OBJC_SELECTOR_REFERENCES_", Casted,
|
|
"__OBJC,__message_refs,literal_pointers,no_dead_strip",
|
|
4, true);
|
|
}
|
|
|
|
if (lvalue)
|
|
return Entry;
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::GetClassName(IdentifierInfo *Ident) {
|
|
llvm::GlobalVariable *&Entry = ClassNames[Ident];
|
|
|
|
if (!Entry)
|
|
Entry = CreateMetadataVar("\01L_OBJC_CLASS_NAME_",
|
|
llvm::ConstantArray::get(VMContext,
|
|
Ident->getNameStart()),
|
|
((ObjCABI == 2) ?
|
|
"__TEXT,__objc_classname,cstring_literals" :
|
|
"__TEXT,__cstring,cstring_literals"),
|
|
1, true);
|
|
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
llvm::Function *CGObjCCommonMac::GetMethodDefinition(const ObjCMethodDecl *MD) {
|
|
llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*>::iterator
|
|
I = MethodDefinitions.find(MD);
|
|
if (I != MethodDefinitions.end())
|
|
return I->second;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/// GetIvarLayoutName - Returns a unique constant for the given
|
|
/// ivar layout bitmap.
|
|
llvm::Constant *CGObjCCommonMac::GetIvarLayoutName(IdentifierInfo *Ident,
|
|
const ObjCCommonTypesHelper &ObjCTypes) {
|
|
return llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
|
|
}
|
|
|
|
void CGObjCCommonMac::BuildAggrIvarRecordLayout(const RecordType *RT,
|
|
unsigned int BytePos,
|
|
bool ForStrongLayout,
|
|
bool &HasUnion) {
|
|
const RecordDecl *RD = RT->getDecl();
|
|
// FIXME - Use iterator.
|
|
SmallVector<const FieldDecl*, 16> Fields(RD->field_begin(), RD->field_end());
|
|
llvm::Type *Ty = CGM.getTypes().ConvertType(QualType(RT, 0));
|
|
const llvm::StructLayout *RecLayout =
|
|
CGM.getTargetData().getStructLayout(cast<llvm::StructType>(Ty));
|
|
|
|
BuildAggrIvarLayout(0, RecLayout, RD, Fields, BytePos,
|
|
ForStrongLayout, HasUnion);
|
|
}
|
|
|
|
void CGObjCCommonMac::BuildAggrIvarLayout(const ObjCImplementationDecl *OI,
|
|
const llvm::StructLayout *Layout,
|
|
const RecordDecl *RD,
|
|
const SmallVectorImpl<const FieldDecl*> &RecFields,
|
|
unsigned int BytePos, bool ForStrongLayout,
|
|
bool &HasUnion) {
|
|
bool IsUnion = (RD && RD->isUnion());
|
|
uint64_t MaxUnionIvarSize = 0;
|
|
uint64_t MaxSkippedUnionIvarSize = 0;
|
|
const FieldDecl *MaxField = 0;
|
|
const FieldDecl *MaxSkippedField = 0;
|
|
const FieldDecl *LastFieldBitfieldOrUnnamed = 0;
|
|
uint64_t MaxFieldOffset = 0;
|
|
uint64_t MaxSkippedFieldOffset = 0;
|
|
uint64_t LastBitfieldOrUnnamedOffset = 0;
|
|
uint64_t FirstFieldDelta = 0;
|
|
|
|
if (RecFields.empty())
|
|
return;
|
|
unsigned WordSizeInBits = CGM.getContext().getTargetInfo().getPointerWidth(0);
|
|
unsigned ByteSizeInBits = CGM.getContext().getTargetInfo().getCharWidth();
|
|
if (!RD && CGM.getLangOptions().ObjCAutoRefCount) {
|
|
const FieldDecl *FirstField = RecFields[0];
|
|
FirstFieldDelta =
|
|
ComputeIvarBaseOffset(CGM, OI, cast<ObjCIvarDecl>(FirstField));
|
|
}
|
|
|
|
for (unsigned i = 0, e = RecFields.size(); i != e; ++i) {
|
|
const FieldDecl *Field = RecFields[i];
|
|
uint64_t FieldOffset;
|
|
if (RD) {
|
|
// Note that 'i' here is actually the field index inside RD of Field,
|
|
// although this dependency is hidden.
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
|
|
FieldOffset = (RL.getFieldOffset(i) / ByteSizeInBits) - FirstFieldDelta;
|
|
} else
|
|
FieldOffset =
|
|
ComputeIvarBaseOffset(CGM, OI, cast<ObjCIvarDecl>(Field)) - FirstFieldDelta;
|
|
|
|
// Skip over unnamed or bitfields
|
|
if (!Field->getIdentifier() || Field->isBitField()) {
|
|
LastFieldBitfieldOrUnnamed = Field;
|
|
LastBitfieldOrUnnamedOffset = FieldOffset;
|
|
continue;
|
|
}
|
|
|
|
LastFieldBitfieldOrUnnamed = 0;
|
|
QualType FQT = Field->getType();
|
|
if (FQT->isRecordType() || FQT->isUnionType()) {
|
|
if (FQT->isUnionType())
|
|
HasUnion = true;
|
|
|
|
BuildAggrIvarRecordLayout(FQT->getAs<RecordType>(),
|
|
BytePos + FieldOffset,
|
|
ForStrongLayout, HasUnion);
|
|
continue;
|
|
}
|
|
|
|
if (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) {
|
|
const ConstantArrayType *CArray =
|
|
dyn_cast_or_null<ConstantArrayType>(Array);
|
|
uint64_t ElCount = CArray->getSize().getZExtValue();
|
|
assert(CArray && "only array with known element size is supported");
|
|
FQT = CArray->getElementType();
|
|
while (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) {
|
|
const ConstantArrayType *CArray =
|
|
dyn_cast_or_null<ConstantArrayType>(Array);
|
|
ElCount *= CArray->getSize().getZExtValue();
|
|
FQT = CArray->getElementType();
|
|
}
|
|
|
|
assert(!FQT->isUnionType() &&
|
|
"layout for array of unions not supported");
|
|
if (FQT->isRecordType() && ElCount) {
|
|
int OldIndex = IvarsInfo.size() - 1;
|
|
int OldSkIndex = SkipIvars.size() -1;
|
|
|
|
const RecordType *RT = FQT->getAs<RecordType>();
|
|
BuildAggrIvarRecordLayout(RT, BytePos + FieldOffset,
|
|
ForStrongLayout, HasUnion);
|
|
|
|
// Replicate layout information for each array element. Note that
|
|
// one element is already done.
|
|
uint64_t ElIx = 1;
|
|
for (int FirstIndex = IvarsInfo.size() - 1,
|
|
FirstSkIndex = SkipIvars.size() - 1 ;ElIx < ElCount; ElIx++) {
|
|
uint64_t Size = CGM.getContext().getTypeSize(RT)/ByteSizeInBits;
|
|
for (int i = OldIndex+1; i <= FirstIndex; ++i)
|
|
IvarsInfo.push_back(GC_IVAR(IvarsInfo[i].ivar_bytepos + Size*ElIx,
|
|
IvarsInfo[i].ivar_size));
|
|
for (int i = OldSkIndex+1; i <= FirstSkIndex; ++i)
|
|
SkipIvars.push_back(GC_IVAR(SkipIvars[i].ivar_bytepos + Size*ElIx,
|
|
SkipIvars[i].ivar_size));
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
// At this point, we are done with Record/Union and array there of.
|
|
// For other arrays we are down to its element type.
|
|
Qualifiers::GC GCAttr = GetGCAttrTypeForType(CGM.getContext(), FQT);
|
|
|
|
unsigned FieldSize = CGM.getContext().getTypeSize(Field->getType());
|
|
if ((ForStrongLayout && GCAttr == Qualifiers::Strong)
|
|
|| (!ForStrongLayout && GCAttr == Qualifiers::Weak)) {
|
|
if (IsUnion) {
|
|
uint64_t UnionIvarSize = FieldSize / WordSizeInBits;
|
|
if (UnionIvarSize > MaxUnionIvarSize) {
|
|
MaxUnionIvarSize = UnionIvarSize;
|
|
MaxField = Field;
|
|
MaxFieldOffset = FieldOffset;
|
|
}
|
|
} else {
|
|
IvarsInfo.push_back(GC_IVAR(BytePos + FieldOffset,
|
|
FieldSize / WordSizeInBits));
|
|
}
|
|
} else if ((ForStrongLayout &&
|
|
(GCAttr == Qualifiers::GCNone || GCAttr == Qualifiers::Weak))
|
|
|| (!ForStrongLayout && GCAttr != Qualifiers::Weak)) {
|
|
if (IsUnion) {
|
|
// FIXME: Why the asymmetry? We divide by word size in bits on other
|
|
// side.
|
|
uint64_t UnionIvarSize = FieldSize;
|
|
if (UnionIvarSize > MaxSkippedUnionIvarSize) {
|
|
MaxSkippedUnionIvarSize = UnionIvarSize;
|
|
MaxSkippedField = Field;
|
|
MaxSkippedFieldOffset = FieldOffset;
|
|
}
|
|
} else {
|
|
// FIXME: Why the asymmetry, we divide by byte size in bits here?
|
|
SkipIvars.push_back(GC_IVAR(BytePos + FieldOffset,
|
|
FieldSize / ByteSizeInBits));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (LastFieldBitfieldOrUnnamed) {
|
|
if (LastFieldBitfieldOrUnnamed->isBitField()) {
|
|
// Last field was a bitfield. Must update skip info.
|
|
uint64_t BitFieldSize
|
|
= LastFieldBitfieldOrUnnamed->getBitWidthValue(CGM.getContext());
|
|
GC_IVAR skivar;
|
|
skivar.ivar_bytepos = BytePos + LastBitfieldOrUnnamedOffset;
|
|
skivar.ivar_size = (BitFieldSize / ByteSizeInBits)
|
|
+ ((BitFieldSize % ByteSizeInBits) != 0);
|
|
SkipIvars.push_back(skivar);
|
|
} else {
|
|
assert(!LastFieldBitfieldOrUnnamed->getIdentifier() &&"Expected unnamed");
|
|
// Last field was unnamed. Must update skip info.
|
|
unsigned FieldSize
|
|
= CGM.getContext().getTypeSize(LastFieldBitfieldOrUnnamed->getType());
|
|
SkipIvars.push_back(GC_IVAR(BytePos + LastBitfieldOrUnnamedOffset,
|
|
FieldSize / ByteSizeInBits));
|
|
}
|
|
}
|
|
|
|
if (MaxField)
|
|
IvarsInfo.push_back(GC_IVAR(BytePos + MaxFieldOffset,
|
|
MaxUnionIvarSize));
|
|
if (MaxSkippedField)
|
|
SkipIvars.push_back(GC_IVAR(BytePos + MaxSkippedFieldOffset,
|
|
MaxSkippedUnionIvarSize));
|
|
}
|
|
|
|
/// BuildIvarLayoutBitmap - This routine is the horsework for doing all
|
|
/// the computations and returning the layout bitmap (for ivar or blocks) in
|
|
/// the given argument BitMap string container. Routine reads
|
|
/// two containers, IvarsInfo and SkipIvars which are assumed to be
|
|
/// filled already by the caller.
|
|
llvm::Constant *CGObjCCommonMac::BuildIvarLayoutBitmap(std::string& BitMap) {
|
|
unsigned int WordsToScan, WordsToSkip;
|
|
llvm::Type *PtrTy = llvm::Type::getInt8PtrTy(VMContext);
|
|
|
|
// Build the string of skip/scan nibbles
|
|
SmallVector<SKIP_SCAN, 32> SkipScanIvars;
|
|
unsigned int WordSize =
|
|
CGM.getTypes().getTargetData().getTypeAllocSize(PtrTy);
|
|
if (IvarsInfo[0].ivar_bytepos == 0) {
|
|
WordsToSkip = 0;
|
|
WordsToScan = IvarsInfo[0].ivar_size;
|
|
} else {
|
|
WordsToSkip = IvarsInfo[0].ivar_bytepos/WordSize;
|
|
WordsToScan = IvarsInfo[0].ivar_size;
|
|
}
|
|
for (unsigned int i=1, Last=IvarsInfo.size(); i != Last; i++) {
|
|
unsigned int TailPrevGCObjC =
|
|
IvarsInfo[i-1].ivar_bytepos + IvarsInfo[i-1].ivar_size * WordSize;
|
|
if (IvarsInfo[i].ivar_bytepos == TailPrevGCObjC) {
|
|
// consecutive 'scanned' object pointers.
|
|
WordsToScan += IvarsInfo[i].ivar_size;
|
|
} else {
|
|
// Skip over 'gc'able object pointer which lay over each other.
|
|
if (TailPrevGCObjC > IvarsInfo[i].ivar_bytepos)
|
|
continue;
|
|
// Must skip over 1 or more words. We save current skip/scan values
|
|
// and start a new pair.
|
|
SKIP_SCAN SkScan;
|
|
SkScan.skip = WordsToSkip;
|
|
SkScan.scan = WordsToScan;
|
|
SkipScanIvars.push_back(SkScan);
|
|
|
|
// Skip the hole.
|
|
SkScan.skip = (IvarsInfo[i].ivar_bytepos - TailPrevGCObjC) / WordSize;
|
|
SkScan.scan = 0;
|
|
SkipScanIvars.push_back(SkScan);
|
|
WordsToSkip = 0;
|
|
WordsToScan = IvarsInfo[i].ivar_size;
|
|
}
|
|
}
|
|
if (WordsToScan > 0) {
|
|
SKIP_SCAN SkScan;
|
|
SkScan.skip = WordsToSkip;
|
|
SkScan.scan = WordsToScan;
|
|
SkipScanIvars.push_back(SkScan);
|
|
}
|
|
|
|
if (!SkipIvars.empty()) {
|
|
unsigned int LastIndex = SkipIvars.size()-1;
|
|
int LastByteSkipped =
|
|
SkipIvars[LastIndex].ivar_bytepos + SkipIvars[LastIndex].ivar_size;
|
|
LastIndex = IvarsInfo.size()-1;
|
|
int LastByteScanned =
|
|
IvarsInfo[LastIndex].ivar_bytepos +
|
|
IvarsInfo[LastIndex].ivar_size * WordSize;
|
|
// Compute number of bytes to skip at the tail end of the last ivar scanned.
|
|
if (LastByteSkipped > LastByteScanned) {
|
|
unsigned int TotalWords = (LastByteSkipped + (WordSize -1)) / WordSize;
|
|
SKIP_SCAN SkScan;
|
|
SkScan.skip = TotalWords - (LastByteScanned/WordSize);
|
|
SkScan.scan = 0;
|
|
SkipScanIvars.push_back(SkScan);
|
|
}
|
|
}
|
|
// Mini optimization of nibbles such that an 0xM0 followed by 0x0N is produced
|
|
// as 0xMN.
|
|
int SkipScan = SkipScanIvars.size()-1;
|
|
for (int i = 0; i <= SkipScan; i++) {
|
|
if ((i < SkipScan) && SkipScanIvars[i].skip && SkipScanIvars[i].scan == 0
|
|
&& SkipScanIvars[i+1].skip == 0 && SkipScanIvars[i+1].scan) {
|
|
// 0xM0 followed by 0x0N detected.
|
|
SkipScanIvars[i].scan = SkipScanIvars[i+1].scan;
|
|
for (int j = i+1; j < SkipScan; j++)
|
|
SkipScanIvars[j] = SkipScanIvars[j+1];
|
|
--SkipScan;
|
|
}
|
|
}
|
|
|
|
// Generate the string.
|
|
for (int i = 0; i <= SkipScan; i++) {
|
|
unsigned char byte;
|
|
unsigned int skip_small = SkipScanIvars[i].skip % 0xf;
|
|
unsigned int scan_small = SkipScanIvars[i].scan % 0xf;
|
|
unsigned int skip_big = SkipScanIvars[i].skip / 0xf;
|
|
unsigned int scan_big = SkipScanIvars[i].scan / 0xf;
|
|
|
|
// first skip big.
|
|
for (unsigned int ix = 0; ix < skip_big; ix++)
|
|
BitMap += (unsigned char)(0xf0);
|
|
|
|
// next (skip small, scan)
|
|
if (skip_small) {
|
|
byte = skip_small << 4;
|
|
if (scan_big > 0) {
|
|
byte |= 0xf;
|
|
--scan_big;
|
|
} else if (scan_small) {
|
|
byte |= scan_small;
|
|
scan_small = 0;
|
|
}
|
|
BitMap += byte;
|
|
}
|
|
// next scan big
|
|
for (unsigned int ix = 0; ix < scan_big; ix++)
|
|
BitMap += (unsigned char)(0x0f);
|
|
// last scan small
|
|
if (scan_small) {
|
|
byte = scan_small;
|
|
BitMap += byte;
|
|
}
|
|
}
|
|
// null terminate string.
|
|
unsigned char zero = 0;
|
|
BitMap += zero;
|
|
|
|
llvm::GlobalVariable * Entry =
|
|
CreateMetadataVar("\01L_OBJC_CLASS_NAME_",
|
|
llvm::ConstantArray::get(VMContext, BitMap.c_str()),
|
|
((ObjCABI == 2) ?
|
|
"__TEXT,__objc_classname,cstring_literals" :
|
|
"__TEXT,__cstring,cstring_literals"),
|
|
1, true);
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
/// BuildIvarLayout - Builds ivar layout bitmap for the class
|
|
/// implementation for the __strong or __weak case.
|
|
/// The layout map displays which words in ivar list must be skipped
|
|
/// and which must be scanned by GC (see below). String is built of bytes.
|
|
/// Each byte is divided up in two nibbles (4-bit each). Left nibble is count
|
|
/// of words to skip and right nibble is count of words to scan. So, each
|
|
/// nibble represents up to 15 workds to skip or scan. Skipping the rest is
|
|
/// represented by a 0x00 byte which also ends the string.
|
|
/// 1. when ForStrongLayout is true, following ivars are scanned:
|
|
/// - id, Class
|
|
/// - object *
|
|
/// - __strong anything
|
|
///
|
|
/// 2. When ForStrongLayout is false, following ivars are scanned:
|
|
/// - __weak anything
|
|
///
|
|
llvm::Constant *CGObjCCommonMac::BuildIvarLayout(
|
|
const ObjCImplementationDecl *OMD,
|
|
bool ForStrongLayout) {
|
|
bool hasUnion = false;
|
|
|
|
llvm::Type *PtrTy = llvm::Type::getInt8PtrTy(VMContext);
|
|
if (CGM.getLangOptions().getGC() == LangOptions::NonGC &&
|
|
!CGM.getLangOptions().ObjCAutoRefCount)
|
|
return llvm::Constant::getNullValue(PtrTy);
|
|
|
|
const ObjCInterfaceDecl *OI = OMD->getClassInterface();
|
|
SmallVector<const FieldDecl*, 32> RecFields;
|
|
if (CGM.getLangOptions().ObjCAutoRefCount) {
|
|
for (const ObjCIvarDecl *IVD = OI->all_declared_ivar_begin();
|
|
IVD; IVD = IVD->getNextIvar())
|
|
RecFields.push_back(cast<FieldDecl>(IVD));
|
|
}
|
|
else {
|
|
SmallVector<const ObjCIvarDecl*, 32> Ivars;
|
|
CGM.getContext().DeepCollectObjCIvars(OI, true, Ivars);
|
|
|
|
// FIXME: This is not ideal; we shouldn't have to do this copy.
|
|
RecFields.append(Ivars.begin(), Ivars.end());
|
|
}
|
|
|
|
if (RecFields.empty())
|
|
return llvm::Constant::getNullValue(PtrTy);
|
|
|
|
SkipIvars.clear();
|
|
IvarsInfo.clear();
|
|
|
|
BuildAggrIvarLayout(OMD, 0, 0, RecFields, 0, ForStrongLayout, hasUnion);
|
|
if (IvarsInfo.empty())
|
|
return llvm::Constant::getNullValue(PtrTy);
|
|
// Sort on byte position in case we encounterred a union nested in
|
|
// the ivar list.
|
|
if (hasUnion && !IvarsInfo.empty())
|
|
std::sort(IvarsInfo.begin(), IvarsInfo.end());
|
|
if (hasUnion && !SkipIvars.empty())
|
|
std::sort(SkipIvars.begin(), SkipIvars.end());
|
|
|
|
std::string BitMap;
|
|
llvm::Constant *C = BuildIvarLayoutBitmap(BitMap);
|
|
|
|
if (CGM.getLangOptions().ObjCGCBitmapPrint) {
|
|
printf("\n%s ivar layout for class '%s': ",
|
|
ForStrongLayout ? "strong" : "weak",
|
|
OMD->getClassInterface()->getName().data());
|
|
const unsigned char *s = (unsigned char*)BitMap.c_str();
|
|
for (unsigned i = 0; i < BitMap.size(); i++)
|
|
if (!(s[i] & 0xf0))
|
|
printf("0x0%x%s", s[i], s[i] != 0 ? ", " : "");
|
|
else
|
|
printf("0x%x%s", s[i], s[i] != 0 ? ", " : "");
|
|
printf("\n");
|
|
}
|
|
return C;
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::GetMethodVarName(Selector Sel) {
|
|
llvm::GlobalVariable *&Entry = MethodVarNames[Sel];
|
|
|
|
// FIXME: Avoid std::string copying.
|
|
if (!Entry)
|
|
Entry = CreateMetadataVar("\01L_OBJC_METH_VAR_NAME_",
|
|
llvm::ConstantArray::get(VMContext, Sel.getAsString()),
|
|
((ObjCABI == 2) ?
|
|
"__TEXT,__objc_methname,cstring_literals" :
|
|
"__TEXT,__cstring,cstring_literals"),
|
|
1, true);
|
|
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
// FIXME: Merge into a single cstring creation function.
|
|
llvm::Constant *CGObjCCommonMac::GetMethodVarName(IdentifierInfo *ID) {
|
|
return GetMethodVarName(CGM.getContext().Selectors.getNullarySelector(ID));
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::GetMethodVarType(const FieldDecl *Field) {
|
|
std::string TypeStr;
|
|
CGM.getContext().getObjCEncodingForType(Field->getType(), TypeStr, Field);
|
|
|
|
llvm::GlobalVariable *&Entry = MethodVarTypes[TypeStr];
|
|
|
|
if (!Entry)
|
|
Entry = CreateMetadataVar("\01L_OBJC_METH_VAR_TYPE_",
|
|
llvm::ConstantArray::get(VMContext, TypeStr),
|
|
((ObjCABI == 2) ?
|
|
"__TEXT,__objc_methtype,cstring_literals" :
|
|
"__TEXT,__cstring,cstring_literals"),
|
|
1, true);
|
|
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
llvm::Constant *CGObjCCommonMac::GetMethodVarType(const ObjCMethodDecl *D) {
|
|
std::string TypeStr;
|
|
if (CGM.getContext().getObjCEncodingForMethodDecl(
|
|
const_cast<ObjCMethodDecl*>(D),
|
|
TypeStr))
|
|
return 0;
|
|
|
|
llvm::GlobalVariable *&Entry = MethodVarTypes[TypeStr];
|
|
|
|
if (!Entry)
|
|
Entry = CreateMetadataVar("\01L_OBJC_METH_VAR_TYPE_",
|
|
llvm::ConstantArray::get(VMContext, TypeStr),
|
|
((ObjCABI == 2) ?
|
|
"__TEXT,__objc_methtype,cstring_literals" :
|
|
"__TEXT,__cstring,cstring_literals"),
|
|
1, true);
|
|
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
// FIXME: Merge into a single cstring creation function.
|
|
llvm::Constant *CGObjCCommonMac::GetPropertyName(IdentifierInfo *Ident) {
|
|
llvm::GlobalVariable *&Entry = PropertyNames[Ident];
|
|
|
|
if (!Entry)
|
|
Entry = CreateMetadataVar("\01L_OBJC_PROP_NAME_ATTR_",
|
|
llvm::ConstantArray::get(VMContext,
|
|
Ident->getNameStart()),
|
|
"__TEXT,__cstring,cstring_literals",
|
|
1, true);
|
|
|
|
return getConstantGEP(VMContext, Entry, 0, 0);
|
|
}
|
|
|
|
// FIXME: Merge into a single cstring creation function.
|
|
// FIXME: This Decl should be more precise.
|
|
llvm::Constant *
|
|
CGObjCCommonMac::GetPropertyTypeString(const ObjCPropertyDecl *PD,
|
|
const Decl *Container) {
|
|
std::string TypeStr;
|
|
CGM.getContext().getObjCEncodingForPropertyDecl(PD, Container, TypeStr);
|
|
return GetPropertyName(&CGM.getContext().Idents.get(TypeStr));
|
|
}
|
|
|
|
void CGObjCCommonMac::GetNameForMethod(const ObjCMethodDecl *D,
|
|
const ObjCContainerDecl *CD,
|
|
SmallVectorImpl<char> &Name) {
|
|
llvm::raw_svector_ostream OS(Name);
|
|
assert (CD && "Missing container decl in GetNameForMethod");
|
|
OS << '\01' << (D->isInstanceMethod() ? '-' : '+')
|
|
<< '[' << CD->getName();
|
|
if (const ObjCCategoryImplDecl *CID =
|
|
dyn_cast<ObjCCategoryImplDecl>(D->getDeclContext()))
|
|
OS << '(' << CID << ')';
|
|
OS << ' ' << D->getSelector().getAsString() << ']';
|
|
}
|
|
|
|
void CGObjCMac::FinishModule() {
|
|
EmitModuleInfo();
|
|
|
|
// Emit the dummy bodies for any protocols which were referenced but
|
|
// never defined.
|
|
for (llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*>::iterator
|
|
I = Protocols.begin(), e = Protocols.end(); I != e; ++I) {
|
|
if (I->second->hasInitializer())
|
|
continue;
|
|
|
|
llvm::Constant *Values[5];
|
|
Values[0] = llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy);
|
|
Values[1] = GetClassName(I->first);
|
|
Values[2] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy);
|
|
Values[3] = Values[4] =
|
|
llvm::Constant::getNullValue(ObjCTypes.MethodDescriptionListPtrTy);
|
|
I->second->setLinkage(llvm::GlobalValue::InternalLinkage);
|
|
I->second->setInitializer(llvm::ConstantStruct::get(ObjCTypes.ProtocolTy,
|
|
Values));
|
|
CGM.AddUsedGlobal(I->second);
|
|
}
|
|
|
|
// Add assembler directives to add lazy undefined symbol references
|
|
// for classes which are referenced but not defined. This is
|
|
// important for correct linker interaction.
|
|
//
|
|
// FIXME: It would be nice if we had an LLVM construct for this.
|
|
if (!LazySymbols.empty() || !DefinedSymbols.empty()) {
|
|
llvm::SmallString<256> Asm;
|
|
Asm += CGM.getModule().getModuleInlineAsm();
|
|
if (!Asm.empty() && Asm.back() != '\n')
|
|
Asm += '\n';
|
|
|
|
llvm::raw_svector_ostream OS(Asm);
|
|
for (llvm::SetVector<IdentifierInfo*>::iterator I = DefinedSymbols.begin(),
|
|
e = DefinedSymbols.end(); I != e; ++I)
|
|
OS << "\t.objc_class_name_" << (*I)->getName() << "=0\n"
|
|
<< "\t.globl .objc_class_name_" << (*I)->getName() << "\n";
|
|
for (llvm::SetVector<IdentifierInfo*>::iterator I = LazySymbols.begin(),
|
|
e = LazySymbols.end(); I != e; ++I) {
|
|
OS << "\t.lazy_reference .objc_class_name_" << (*I)->getName() << "\n";
|
|
}
|
|
|
|
for (size_t i = 0; i < DefinedCategoryNames.size(); ++i) {
|
|
OS << "\t.objc_category_name_" << DefinedCategoryNames[i] << "=0\n"
|
|
<< "\t.globl .objc_category_name_" << DefinedCategoryNames[i] << "\n";
|
|
}
|
|
|
|
CGM.getModule().setModuleInlineAsm(OS.str());
|
|
}
|
|
}
|
|
|
|
CGObjCNonFragileABIMac::CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm)
|
|
: CGObjCCommonMac(cgm),
|
|
ObjCTypes(cgm) {
|
|
ObjCEmptyCacheVar = ObjCEmptyVtableVar = NULL;
|
|
ObjCABI = 2;
|
|
}
|
|
|
|
/* *** */
|
|
|
|
ObjCCommonTypesHelper::ObjCCommonTypesHelper(CodeGen::CodeGenModule &cgm)
|
|
: VMContext(cgm.getLLVMContext()), CGM(cgm) {
|
|
CodeGen::CodeGenTypes &Types = CGM.getTypes();
|
|
ASTContext &Ctx = CGM.getContext();
|
|
|
|
ShortTy = Types.ConvertType(Ctx.ShortTy);
|
|
IntTy = Types.ConvertType(Ctx.IntTy);
|
|
LongTy = Types.ConvertType(Ctx.LongTy);
|
|
LongLongTy = Types.ConvertType(Ctx.LongLongTy);
|
|
Int8PtrTy = llvm::Type::getInt8PtrTy(VMContext);
|
|
|
|
ObjectPtrTy = Types.ConvertType(Ctx.getObjCIdType());
|
|
PtrObjectPtrTy = llvm::PointerType::getUnqual(ObjectPtrTy);
|
|
SelectorPtrTy = Types.ConvertType(Ctx.getObjCSelType());
|
|
|
|
// FIXME: It would be nice to unify this with the opaque type, so that the IR
|
|
// comes out a bit cleaner.
|
|
llvm::Type *T = Types.ConvertType(Ctx.getObjCProtoType());
|
|
ExternalProtocolPtrTy = llvm::PointerType::getUnqual(T);
|
|
|
|
// I'm not sure I like this. The implicit coordination is a bit
|
|
// gross. We should solve this in a reasonable fashion because this
|
|
// is a pretty common task (match some runtime data structure with
|
|
// an LLVM data structure).
|
|
|
|
// FIXME: This is leaked.
|
|
// FIXME: Merge with rewriter code?
|
|
|
|
// struct _objc_super {
|
|
// id self;
|
|
// Class cls;
|
|
// }
|
|
RecordDecl *RD = RecordDecl::Create(Ctx, TTK_Struct,
|
|
Ctx.getTranslationUnitDecl(),
|
|
SourceLocation(), SourceLocation(),
|
|
&Ctx.Idents.get("_objc_super"));
|
|
RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(), 0,
|
|
Ctx.getObjCIdType(), 0, 0, false, false));
|
|
RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(), 0,
|
|
Ctx.getObjCClassType(), 0, 0, false, false));
|
|
RD->completeDefinition();
|
|
|
|
SuperCTy = Ctx.getTagDeclType(RD);
|
|
SuperPtrCTy = Ctx.getPointerType(SuperCTy);
|
|
|
|
SuperTy = cast<llvm::StructType>(Types.ConvertType(SuperCTy));
|
|
SuperPtrTy = llvm::PointerType::getUnqual(SuperTy);
|
|
|
|
// struct _prop_t {
|
|
// char *name;
|
|
// char *attributes;
|
|
// }
|
|
PropertyTy = llvm::StructType::create("struct._prop_t",
|
|
Int8PtrTy, Int8PtrTy, NULL);
|
|
|
|
// struct _prop_list_t {
|
|
// uint32_t entsize; // sizeof(struct _prop_t)
|
|
// uint32_t count_of_properties;
|
|
// struct _prop_t prop_list[count_of_properties];
|
|
// }
|
|
PropertyListTy =
|
|
llvm::StructType::create("struct._prop_list_t", IntTy, IntTy,
|
|
llvm::ArrayType::get(PropertyTy, 0), NULL);
|
|
// struct _prop_list_t *
|
|
PropertyListPtrTy = llvm::PointerType::getUnqual(PropertyListTy);
|
|
|
|
// struct _objc_method {
|
|
// SEL _cmd;
|
|
// char *method_type;
|
|
// char *_imp;
|
|
// }
|
|
MethodTy = llvm::StructType::create("struct._objc_method",
|
|
SelectorPtrTy, Int8PtrTy, Int8PtrTy,
|
|
NULL);
|
|
|
|
// struct _objc_cache *
|
|
CacheTy = llvm::StructType::create(VMContext, "struct._objc_cache");
|
|
CachePtrTy = llvm::PointerType::getUnqual(CacheTy);
|
|
|
|
}
|
|
|
|
ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
|
|
: ObjCCommonTypesHelper(cgm) {
|
|
// struct _objc_method_description {
|
|
// SEL name;
|
|
// char *types;
|
|
// }
|
|
MethodDescriptionTy =
|
|
llvm::StructType::create("struct._objc_method_description",
|
|
SelectorPtrTy, Int8PtrTy, NULL);
|
|
|
|
// struct _objc_method_description_list {
|
|
// int count;
|
|
// struct _objc_method_description[1];
|
|
// }
|
|
MethodDescriptionListTy =
|
|
llvm::StructType::create("struct._objc_method_description_list",
|
|
IntTy,
|
|
llvm::ArrayType::get(MethodDescriptionTy, 0),NULL);
|
|
|
|
// struct _objc_method_description_list *
|
|
MethodDescriptionListPtrTy =
|
|
llvm::PointerType::getUnqual(MethodDescriptionListTy);
|
|
|
|
// Protocol description structures
|
|
|
|
// struct _objc_protocol_extension {
|
|
// uint32_t size; // sizeof(struct _objc_protocol_extension)
|
|
// struct _objc_method_description_list *optional_instance_methods;
|
|
// struct _objc_method_description_list *optional_class_methods;
|
|
// struct _objc_property_list *instance_properties;
|
|
// }
|
|
ProtocolExtensionTy =
|
|
llvm::StructType::create("struct._objc_protocol_extension",
|
|
IntTy, MethodDescriptionListPtrTy,
|
|
MethodDescriptionListPtrTy, PropertyListPtrTy,
|
|
NULL);
|
|
|
|
// struct _objc_protocol_extension *
|
|
ProtocolExtensionPtrTy = llvm::PointerType::getUnqual(ProtocolExtensionTy);
|
|
|
|
// Handle recursive construction of Protocol and ProtocolList types
|
|
|
|
ProtocolTy =
|
|
llvm::StructType::create(VMContext, "struct._objc_protocol");
|
|
|
|
ProtocolListTy =
|
|
llvm::StructType::create(VMContext, "struct._objc_protocol_list");
|
|
ProtocolListTy->setBody(llvm::PointerType::getUnqual(ProtocolListTy),
|
|
LongTy,
|
|
llvm::ArrayType::get(ProtocolTy, 0),
|
|
NULL);
|
|
|
|
// struct _objc_protocol {
|
|
// struct _objc_protocol_extension *isa;
|
|
// char *protocol_name;
|
|
// struct _objc_protocol **_objc_protocol_list;
|
|
// struct _objc_method_description_list *instance_methods;
|
|
// struct _objc_method_description_list *class_methods;
|
|
// }
|
|
ProtocolTy->setBody(ProtocolExtensionPtrTy, Int8PtrTy,
|
|
llvm::PointerType::getUnqual(ProtocolListTy),
|
|
MethodDescriptionListPtrTy,
|
|
MethodDescriptionListPtrTy,
|
|
NULL);
|
|
|
|
// struct _objc_protocol_list *
|
|
ProtocolListPtrTy = llvm::PointerType::getUnqual(ProtocolListTy);
|
|
|
|
ProtocolPtrTy = llvm::PointerType::getUnqual(ProtocolTy);
|
|
|
|
// Class description structures
|
|
|
|
// struct _objc_ivar {
|
|
// char *ivar_name;
|
|
// char *ivar_type;
|
|
// int ivar_offset;
|
|
// }
|
|
IvarTy = llvm::StructType::create("struct._objc_ivar",
|
|
Int8PtrTy, Int8PtrTy, IntTy, NULL);
|
|
|
|
// struct _objc_ivar_list *
|
|
IvarListTy =
|
|
llvm::StructType::create(VMContext, "struct._objc_ivar_list");
|
|
IvarListPtrTy = llvm::PointerType::getUnqual(IvarListTy);
|
|
|
|
// struct _objc_method_list *
|
|
MethodListTy =
|
|
llvm::StructType::create(VMContext, "struct._objc_method_list");
|
|
MethodListPtrTy = llvm::PointerType::getUnqual(MethodListTy);
|
|
|
|
// struct _objc_class_extension *
|
|
ClassExtensionTy =
|
|
llvm::StructType::create("struct._objc_class_extension",
|
|
IntTy, Int8PtrTy, PropertyListPtrTy, NULL);
|
|
ClassExtensionPtrTy = llvm::PointerType::getUnqual(ClassExtensionTy);
|
|
|
|
ClassTy = llvm::StructType::create(VMContext, "struct._objc_class");
|
|
|
|
// struct _objc_class {
|
|
// Class isa;
|
|
// Class super_class;
|
|
// char *name;
|
|
// long version;
|
|
// long info;
|
|
// long instance_size;
|
|
// struct _objc_ivar_list *ivars;
|
|
// struct _objc_method_list *methods;
|
|
// struct _objc_cache *cache;
|
|
// struct _objc_protocol_list *protocols;
|
|
// char *ivar_layout;
|
|
// struct _objc_class_ext *ext;
|
|
// };
|
|
ClassTy->setBody(llvm::PointerType::getUnqual(ClassTy),
|
|
llvm::PointerType::getUnqual(ClassTy),
|
|
Int8PtrTy,
|
|
LongTy,
|
|
LongTy,
|
|
LongTy,
|
|
IvarListPtrTy,
|
|
MethodListPtrTy,
|
|
CachePtrTy,
|
|
ProtocolListPtrTy,
|
|
Int8PtrTy,
|
|
ClassExtensionPtrTy,
|
|
NULL);
|
|
|
|
ClassPtrTy = llvm::PointerType::getUnqual(ClassTy);
|
|
|
|
// struct _objc_category {
|
|
// char *category_name;
|
|
// char *class_name;
|
|
// struct _objc_method_list *instance_method;
|
|
// struct _objc_method_list *class_method;
|
|
// uint32_t size; // sizeof(struct _objc_category)
|
|
// struct _objc_property_list *instance_properties;// category's @property
|
|
// }
|
|
CategoryTy =
|
|
llvm::StructType::create("struct._objc_category",
|
|
Int8PtrTy, Int8PtrTy, MethodListPtrTy,
|
|
MethodListPtrTy, ProtocolListPtrTy,
|
|
IntTy, PropertyListPtrTy, NULL);
|
|
|
|
// Global metadata structures
|
|
|
|
// struct _objc_symtab {
|
|
// long sel_ref_cnt;
|
|
// SEL *refs;
|
|
// short cls_def_cnt;
|
|
// short cat_def_cnt;
|
|
// char *defs[cls_def_cnt + cat_def_cnt];
|
|
// }
|
|
SymtabTy =
|
|
llvm::StructType::create("struct._objc_symtab",
|
|
LongTy, SelectorPtrTy, ShortTy, ShortTy,
|
|
llvm::ArrayType::get(Int8PtrTy, 0), NULL);
|
|
SymtabPtrTy = llvm::PointerType::getUnqual(SymtabTy);
|
|
|
|
// struct _objc_module {
|
|
// long version;
|
|
// long size; // sizeof(struct _objc_module)
|
|
// char *name;
|
|
// struct _objc_symtab* symtab;
|
|
// }
|
|
ModuleTy =
|
|
llvm::StructType::create("struct._objc_module",
|
|
LongTy, LongTy, Int8PtrTy, SymtabPtrTy, NULL);
|
|
|
|
|
|
// FIXME: This is the size of the setjmp buffer and should be target
|
|
// specific. 18 is what's used on 32-bit X86.
|
|
uint64_t SetJmpBufferSize = 18;
|
|
|
|
// Exceptions
|
|
llvm::Type *StackPtrTy = llvm::ArrayType::get(
|
|
llvm::Type::getInt8PtrTy(VMContext), 4);
|
|
|
|
ExceptionDataTy =
|
|
llvm::StructType::create("struct._objc_exception_data",
|
|
llvm::ArrayType::get(llvm::Type::getInt32Ty(VMContext),
|
|
SetJmpBufferSize),
|
|
StackPtrTy, NULL);
|
|
|
|
}
|
|
|
|
ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm)
|
|
: ObjCCommonTypesHelper(cgm) {
|
|
// struct _method_list_t {
|
|
// uint32_t entsize; // sizeof(struct _objc_method)
|
|
// uint32_t method_count;
|
|
// struct _objc_method method_list[method_count];
|
|
// }
|
|
MethodListnfABITy =
|
|
llvm::StructType::create("struct.__method_list_t", IntTy, IntTy,
|
|
llvm::ArrayType::get(MethodTy, 0), NULL);
|
|
// struct method_list_t *
|
|
MethodListnfABIPtrTy = llvm::PointerType::getUnqual(MethodListnfABITy);
|
|
|
|
// struct _protocol_t {
|
|
// id isa; // NULL
|
|
// const char * const protocol_name;
|
|
// const struct _protocol_list_t * protocol_list; // super protocols
|
|
// const struct method_list_t * const instance_methods;
|
|
// const struct method_list_t * const class_methods;
|
|
// const struct method_list_t *optionalInstanceMethods;
|
|
// const struct method_list_t *optionalClassMethods;
|
|
// const struct _prop_list_t * properties;
|
|
// const uint32_t size; // sizeof(struct _protocol_t)
|
|
// const uint32_t flags; // = 0
|
|
// }
|
|
|
|
// Holder for struct _protocol_list_t *
|
|
ProtocolListnfABITy =
|
|
llvm::StructType::create(VMContext, "struct._objc_protocol_list");
|
|
|
|
ProtocolnfABITy =
|
|
llvm::StructType::create("struct._protocol_t", ObjectPtrTy, Int8PtrTy,
|
|
llvm::PointerType::getUnqual(ProtocolListnfABITy),
|
|
MethodListnfABIPtrTy, MethodListnfABIPtrTy,
|
|
MethodListnfABIPtrTy, MethodListnfABIPtrTy,
|
|
PropertyListPtrTy, IntTy, IntTy, NULL);
|
|
|
|
// struct _protocol_t*
|
|
ProtocolnfABIPtrTy = llvm::PointerType::getUnqual(ProtocolnfABITy);
|
|
|
|
// struct _protocol_list_t {
|
|
// long protocol_count; // Note, this is 32/64 bit
|
|
// struct _protocol_t *[protocol_count];
|
|
// }
|
|
ProtocolListnfABITy->setBody(LongTy,
|
|
llvm::ArrayType::get(ProtocolnfABIPtrTy, 0),
|
|
NULL);
|
|
|
|
// struct _objc_protocol_list*
|
|
ProtocolListnfABIPtrTy = llvm::PointerType::getUnqual(ProtocolListnfABITy);
|
|
|
|
// struct _ivar_t {
|
|
// unsigned long int *offset; // pointer to ivar offset location
|
|
// char *name;
|
|
// char *type;
|
|
// uint32_t alignment;
|
|
// uint32_t size;
|
|
// }
|
|
IvarnfABITy =
|
|
llvm::StructType::create("struct._ivar_t",
|
|
llvm::PointerType::getUnqual(LongTy),
|
|
Int8PtrTy, Int8PtrTy, IntTy, IntTy, NULL);
|
|
|
|
// struct _ivar_list_t {
|
|
// uint32 entsize; // sizeof(struct _ivar_t)
|
|
// uint32 count;
|
|
// struct _iver_t list[count];
|
|
// }
|
|
IvarListnfABITy =
|
|
llvm::StructType::create("struct._ivar_list_t", IntTy, IntTy,
|
|
llvm::ArrayType::get(IvarnfABITy, 0), NULL);
|
|
|
|
IvarListnfABIPtrTy = llvm::PointerType::getUnqual(IvarListnfABITy);
|
|
|
|
// struct _class_ro_t {
|
|
// uint32_t const flags;
|
|
// uint32_t const instanceStart;
|
|
// uint32_t const instanceSize;
|
|
// uint32_t const reserved; // only when building for 64bit targets
|
|
// const uint8_t * const ivarLayout;
|
|
// const char *const name;
|
|
// const struct _method_list_t * const baseMethods;
|
|
// const struct _objc_protocol_list *const baseProtocols;
|
|
// const struct _ivar_list_t *const ivars;
|
|
// const uint8_t * const weakIvarLayout;
|
|
// const struct _prop_list_t * const properties;
|
|
// }
|
|
|
|
// FIXME. Add 'reserved' field in 64bit abi mode!
|
|
ClassRonfABITy = llvm::StructType::create("struct._class_ro_t",
|
|
IntTy, IntTy, IntTy, Int8PtrTy,
|
|
Int8PtrTy, MethodListnfABIPtrTy,
|
|
ProtocolListnfABIPtrTy,
|
|
IvarListnfABIPtrTy,
|
|
Int8PtrTy, PropertyListPtrTy, NULL);
|
|
|
|
// ImpnfABITy - LLVM for id (*)(id, SEL, ...)
|
|
llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
|
|
ImpnfABITy = llvm::FunctionType::get(ObjectPtrTy, params, false)
|
|
->getPointerTo();
|
|
|
|
// struct _class_t {
|
|
// struct _class_t *isa;
|
|
// struct _class_t * const superclass;
|
|
// void *cache;
|
|
// IMP *vtable;
|
|
// struct class_ro_t *ro;
|
|
// }
|
|
|
|
ClassnfABITy = llvm::StructType::create(VMContext, "struct._class_t");
|
|
ClassnfABITy->setBody(llvm::PointerType::getUnqual(ClassnfABITy),
|
|
llvm::PointerType::getUnqual(ClassnfABITy),
|
|
CachePtrTy,
|
|
llvm::PointerType::getUnqual(ImpnfABITy),
|
|
llvm::PointerType::getUnqual(ClassRonfABITy),
|
|
NULL);
|
|
|
|
// LLVM for struct _class_t *
|
|
ClassnfABIPtrTy = llvm::PointerType::getUnqual(ClassnfABITy);
|
|
|
|
// struct _category_t {
|
|
// const char * const name;
|
|
// struct _class_t *const cls;
|
|
// const struct _method_list_t * const instance_methods;
|
|
// const struct _method_list_t * const class_methods;
|
|
// const struct _protocol_list_t * const protocols;
|
|
// const struct _prop_list_t * const properties;
|
|
// }
|
|
CategorynfABITy = llvm::StructType::create("struct._category_t",
|
|
Int8PtrTy, ClassnfABIPtrTy,
|
|
MethodListnfABIPtrTy,
|
|
MethodListnfABIPtrTy,
|
|
ProtocolListnfABIPtrTy,
|
|
PropertyListPtrTy,
|
|
NULL);
|
|
|
|
// New types for nonfragile abi messaging.
|
|
CodeGen::CodeGenTypes &Types = CGM.getTypes();
|
|
ASTContext &Ctx = CGM.getContext();
|
|
|
|
// MessageRefTy - LLVM for:
|
|
// struct _message_ref_t {
|
|
// IMP messenger;
|
|
// SEL name;
|
|
// };
|
|
|
|
// First the clang type for struct _message_ref_t
|
|
RecordDecl *RD = RecordDecl::Create(Ctx, TTK_Struct,
|
|
Ctx.getTranslationUnitDecl(),
|
|
SourceLocation(), SourceLocation(),
|
|
&Ctx.Idents.get("_message_ref_t"));
|
|
RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(), 0,
|
|
Ctx.VoidPtrTy, 0, 0, false, false));
|
|
RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(), 0,
|
|
Ctx.getObjCSelType(), 0, 0, false, false));
|
|
RD->completeDefinition();
|
|
|
|
MessageRefCTy = Ctx.getTagDeclType(RD);
|
|
MessageRefCPtrTy = Ctx.getPointerType(MessageRefCTy);
|
|
MessageRefTy = cast<llvm::StructType>(Types.ConvertType(MessageRefCTy));
|
|
|
|
// MessageRefPtrTy - LLVM for struct _message_ref_t*
|
|
MessageRefPtrTy = llvm::PointerType::getUnqual(MessageRefTy);
|
|
|
|
// SuperMessageRefTy - LLVM for:
|
|
// struct _super_message_ref_t {
|
|
// SUPER_IMP messenger;
|
|
// SEL name;
|
|
// };
|
|
SuperMessageRefTy =
|
|
llvm::StructType::create("struct._super_message_ref_t",
|
|
ImpnfABITy, SelectorPtrTy, NULL);
|
|
|
|
// SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t*
|
|
SuperMessageRefPtrTy = llvm::PointerType::getUnqual(SuperMessageRefTy);
|
|
|
|
|
|
// struct objc_typeinfo {
|
|
// const void** vtable; // objc_ehtype_vtable + 2
|
|
// const char* name; // c++ typeinfo string
|
|
// Class cls;
|
|
// };
|
|
EHTypeTy =
|
|
llvm::StructType::create("struct._objc_typeinfo",
|
|
llvm::PointerType::getUnqual(Int8PtrTy),
|
|
Int8PtrTy, ClassnfABIPtrTy, NULL);
|
|
EHTypePtrTy = llvm::PointerType::getUnqual(EHTypeTy);
|
|
}
|
|
|
|
llvm::Function *CGObjCNonFragileABIMac::ModuleInitFunction() {
|
|
FinishNonFragileABIModule();
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::AddModuleClassList(const
|
|
std::vector<llvm::GlobalValue*>
|
|
&Container,
|
|
const char *SymbolName,
|
|
const char *SectionName) {
|
|
unsigned NumClasses = Container.size();
|
|
|
|
if (!NumClasses)
|
|
return;
|
|
|
|
std::vector<llvm::Constant*> Symbols(NumClasses);
|
|
for (unsigned i=0; i<NumClasses; i++)
|
|
Symbols[i] = llvm::ConstantExpr::getBitCast(Container[i],
|
|
ObjCTypes.Int8PtrTy);
|
|
llvm::Constant* Init =
|
|
llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.Int8PtrTy,
|
|
NumClasses),
|
|
Symbols);
|
|
|
|
llvm::GlobalVariable *GV =
|
|
new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init,
|
|
SymbolName);
|
|
GV->setAlignment(CGM.getTargetData().getABITypeAlignment(Init->getType()));
|
|
GV->setSection(SectionName);
|
|
CGM.AddUsedGlobal(GV);
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::FinishNonFragileABIModule() {
|
|
// nonfragile abi has no module definition.
|
|
|
|
// Build list of all implemented class addresses in array
|
|
// L_OBJC_LABEL_CLASS_$.
|
|
AddModuleClassList(DefinedClasses,
|
|
"\01L_OBJC_LABEL_CLASS_$",
|
|
"__DATA, __objc_classlist, regular, no_dead_strip");
|
|
|
|
for (unsigned i = 0; i < DefinedClasses.size(); i++) {
|
|
llvm::GlobalValue *IMPLGV = DefinedClasses[i];
|
|
if (IMPLGV->getLinkage() != llvm::GlobalValue::ExternalWeakLinkage)
|
|
continue;
|
|
IMPLGV->setLinkage(llvm::GlobalValue::ExternalLinkage);
|
|
}
|
|
|
|
for (unsigned i = 0; i < DefinedMetaClasses.size(); i++) {
|
|
llvm::GlobalValue *IMPLGV = DefinedMetaClasses[i];
|
|
if (IMPLGV->getLinkage() != llvm::GlobalValue::ExternalWeakLinkage)
|
|
continue;
|
|
IMPLGV->setLinkage(llvm::GlobalValue::ExternalLinkage);
|
|
}
|
|
|
|
AddModuleClassList(DefinedNonLazyClasses,
|
|
"\01L_OBJC_LABEL_NONLAZY_CLASS_$",
|
|
"__DATA, __objc_nlclslist, regular, no_dead_strip");
|
|
|
|
// Build list of all implemented category addresses in array
|
|
// L_OBJC_LABEL_CATEGORY_$.
|
|
AddModuleClassList(DefinedCategories,
|
|
"\01L_OBJC_LABEL_CATEGORY_$",
|
|
"__DATA, __objc_catlist, regular, no_dead_strip");
|
|
AddModuleClassList(DefinedNonLazyCategories,
|
|
"\01L_OBJC_LABEL_NONLAZY_CATEGORY_$",
|
|
"__DATA, __objc_nlcatlist, regular, no_dead_strip");
|
|
|
|
EmitImageInfo();
|
|
}
|
|
|
|
/// isVTableDispatchedSelector - Returns true if SEL is not in the list of
|
|
/// VTableDispatchMethods; false otherwise. What this means is that
|
|
/// except for the 19 selectors in the list, we generate 32bit-style
|
|
/// message dispatch call for all the rest.
|
|
bool CGObjCNonFragileABIMac::isVTableDispatchedSelector(Selector Sel) {
|
|
// At various points we've experimented with using vtable-based
|
|
// dispatch for all methods.
|
|
switch (CGM.getCodeGenOpts().getObjCDispatchMethod()) {
|
|
default:
|
|
llvm_unreachable("Invalid dispatch method!");
|
|
case CodeGenOptions::Legacy:
|
|
return false;
|
|
case CodeGenOptions::NonLegacy:
|
|
return true;
|
|
case CodeGenOptions::Mixed:
|
|
break;
|
|
}
|
|
|
|
// If so, see whether this selector is in the white-list of things which must
|
|
// use the new dispatch convention. We lazily build a dense set for this.
|
|
if (VTableDispatchMethods.empty()) {
|
|
VTableDispatchMethods.insert(GetNullarySelector("alloc"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("class"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("self"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("isFlipped"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("length"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("count"));
|
|
|
|
// These are vtable-based if GC is disabled.
|
|
// Optimistically use vtable dispatch for hybrid compiles.
|
|
if (CGM.getLangOptions().getGC() != LangOptions::GCOnly) {
|
|
VTableDispatchMethods.insert(GetNullarySelector("retain"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("release"));
|
|
VTableDispatchMethods.insert(GetNullarySelector("autorelease"));
|
|
}
|
|
|
|
VTableDispatchMethods.insert(GetUnarySelector("allocWithZone"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("isKindOfClass"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("respondsToSelector"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("objectForKey"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("objectAtIndex"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("isEqualToString"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("isEqual"));
|
|
|
|
// These are vtable-based if GC is enabled.
|
|
// Optimistically use vtable dispatch for hybrid compiles.
|
|
if (CGM.getLangOptions().getGC() != LangOptions::NonGC) {
|
|
VTableDispatchMethods.insert(GetNullarySelector("hash"));
|
|
VTableDispatchMethods.insert(GetUnarySelector("addObject"));
|
|
|
|
// "countByEnumeratingWithState:objects:count"
|
|
IdentifierInfo *KeyIdents[] = {
|
|
&CGM.getContext().Idents.get("countByEnumeratingWithState"),
|
|
&CGM.getContext().Idents.get("objects"),
|
|
&CGM.getContext().Idents.get("count")
|
|
};
|
|
VTableDispatchMethods.insert(
|
|
CGM.getContext().Selectors.getSelector(3, KeyIdents));
|
|
}
|
|
}
|
|
|
|
return VTableDispatchMethods.count(Sel);
|
|
}
|
|
|
|
// Metadata flags
|
|
enum MetaDataDlags {
|
|
CLS = 0x0,
|
|
CLS_META = 0x1,
|
|
CLS_ROOT = 0x2,
|
|
OBJC2_CLS_HIDDEN = 0x10,
|
|
CLS_EXCEPTION = 0x20,
|
|
|
|
/// (Obsolete) ARC-specific: this class has a .release_ivars method
|
|
CLS_HAS_IVAR_RELEASER = 0x40,
|
|
/// class was compiled with -fobjc-arr
|
|
CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
|
|
};
|
|
/// BuildClassRoTInitializer - generate meta-data for:
|
|
/// struct _class_ro_t {
|
|
/// uint32_t const flags;
|
|
/// uint32_t const instanceStart;
|
|
/// uint32_t const instanceSize;
|
|
/// uint32_t const reserved; // only when building for 64bit targets
|
|
/// const uint8_t * const ivarLayout;
|
|
/// const char *const name;
|
|
/// const struct _method_list_t * const baseMethods;
|
|
/// const struct _protocol_list_t *const baseProtocols;
|
|
/// const struct _ivar_list_t *const ivars;
|
|
/// const uint8_t * const weakIvarLayout;
|
|
/// const struct _prop_list_t * const properties;
|
|
/// }
|
|
///
|
|
llvm::GlobalVariable * CGObjCNonFragileABIMac::BuildClassRoTInitializer(
|
|
unsigned flags,
|
|
unsigned InstanceStart,
|
|
unsigned InstanceSize,
|
|
const ObjCImplementationDecl *ID) {
|
|
std::string ClassName = ID->getNameAsString();
|
|
llvm::Constant *Values[10]; // 11 for 64bit targets!
|
|
|
|
if (CGM.getLangOptions().ObjCAutoRefCount)
|
|
flags |= CLS_COMPILED_BY_ARC;
|
|
|
|
Values[ 0] = llvm::ConstantInt::get(ObjCTypes.IntTy, flags);
|
|
Values[ 1] = llvm::ConstantInt::get(ObjCTypes.IntTy, InstanceStart);
|
|
Values[ 2] = llvm::ConstantInt::get(ObjCTypes.IntTy, InstanceSize);
|
|
// FIXME. For 64bit targets add 0 here.
|
|
Values[ 3] = (flags & CLS_META) ? GetIvarLayoutName(0, ObjCTypes)
|
|
: BuildIvarLayout(ID, true);
|
|
Values[ 4] = GetClassName(ID->getIdentifier());
|
|
// const struct _method_list_t * const baseMethods;
|
|
std::vector<llvm::Constant*> Methods;
|
|
std::string MethodListName("\01l_OBJC_$_");
|
|
if (flags & CLS_META) {
|
|
MethodListName += "CLASS_METHODS_" + ID->getNameAsString();
|
|
for (ObjCImplementationDecl::classmeth_iterator
|
|
i = ID->classmeth_begin(), e = ID->classmeth_end(); i != e; ++i) {
|
|
// Class methods should always be defined.
|
|
Methods.push_back(GetMethodConstant(*i));
|
|
}
|
|
} else {
|
|
MethodListName += "INSTANCE_METHODS_" + ID->getNameAsString();
|
|
for (ObjCImplementationDecl::instmeth_iterator
|
|
i = ID->instmeth_begin(), e = ID->instmeth_end(); i != e; ++i) {
|
|
// Instance methods should always be defined.
|
|
Methods.push_back(GetMethodConstant(*i));
|
|
}
|
|
for (ObjCImplementationDecl::propimpl_iterator
|
|
i = ID->propimpl_begin(), e = ID->propimpl_end(); i != e; ++i) {
|
|
ObjCPropertyImplDecl *PID = *i;
|
|
|
|
if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize){
|
|
ObjCPropertyDecl *PD = PID->getPropertyDecl();
|
|
|
|
if (ObjCMethodDecl *MD = PD->getGetterMethodDecl())
|
|
if (llvm::Constant *C = GetMethodConstant(MD))
|
|
Methods.push_back(C);
|
|
if (ObjCMethodDecl *MD = PD->getSetterMethodDecl())
|
|
if (llvm::Constant *C = GetMethodConstant(MD))
|
|
Methods.push_back(C);
|
|
}
|
|
}
|
|
}
|
|
Values[ 5] = EmitMethodList(MethodListName,
|
|
"__DATA, __objc_const", Methods);
|
|
|
|
const ObjCInterfaceDecl *OID = ID->getClassInterface();
|
|
assert(OID && "CGObjCNonFragileABIMac::BuildClassRoTInitializer");
|
|
Values[ 6] = EmitProtocolList("\01l_OBJC_CLASS_PROTOCOLS_$_"
|
|
+ OID->getName(),
|
|
OID->all_referenced_protocol_begin(),
|
|
OID->all_referenced_protocol_end());
|
|
|
|
if (flags & CLS_META)
|
|
Values[ 7] = llvm::Constant::getNullValue(ObjCTypes.IvarListnfABIPtrTy);
|
|
else
|
|
Values[ 7] = EmitIvarList(ID);
|
|
Values[ 8] = (flags & CLS_META) ? GetIvarLayoutName(0, ObjCTypes)
|
|
: BuildIvarLayout(ID, false);
|
|
if (flags & CLS_META)
|
|
Values[ 9] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
|
|
else
|
|
Values[ 9] = EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ID->getName(),
|
|
ID, ID->getClassInterface(), ObjCTypes);
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassRonfABITy,
|
|
Values);
|
|
llvm::GlobalVariable *CLASS_RO_GV =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassRonfABITy, false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init,
|
|
(flags & CLS_META) ?
|
|
std::string("\01l_OBJC_METACLASS_RO_$_")+ClassName :
|
|
std::string("\01l_OBJC_CLASS_RO_$_")+ClassName);
|
|
CLASS_RO_GV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.ClassRonfABITy));
|
|
CLASS_RO_GV->setSection("__DATA, __objc_const");
|
|
return CLASS_RO_GV;
|
|
|
|
}
|
|
|
|
/// BuildClassMetaData - This routine defines that to-level meta-data
|
|
/// for the given ClassName for:
|
|
/// struct _class_t {
|
|
/// struct _class_t *isa;
|
|
/// struct _class_t * const superclass;
|
|
/// void *cache;
|
|
/// IMP *vtable;
|
|
/// struct class_ro_t *ro;
|
|
/// }
|
|
///
|
|
llvm::GlobalVariable * CGObjCNonFragileABIMac::BuildClassMetaData(
|
|
std::string &ClassName,
|
|
llvm::Constant *IsAGV,
|
|
llvm::Constant *SuperClassGV,
|
|
llvm::Constant *ClassRoGV,
|
|
bool HiddenVisibility) {
|
|
llvm::Constant *Values[] = {
|
|
IsAGV,
|
|
SuperClassGV,
|
|
ObjCEmptyCacheVar, // &ObjCEmptyCacheVar
|
|
ObjCEmptyVtableVar, // &ObjCEmptyVtableVar
|
|
ClassRoGV // &CLASS_RO_GV
|
|
};
|
|
if (!Values[1])
|
|
Values[1] = llvm::Constant::getNullValue(ObjCTypes.ClassnfABIPtrTy);
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ClassnfABITy,
|
|
Values);
|
|
llvm::GlobalVariable *GV = GetClassGlobal(ClassName);
|
|
GV->setInitializer(Init);
|
|
GV->setSection("__DATA, __objc_data");
|
|
GV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.ClassnfABITy));
|
|
if (HiddenVisibility)
|
|
GV->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
return GV;
|
|
}
|
|
|
|
bool
|
|
CGObjCNonFragileABIMac::ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
|
|
return OD->getClassMethod(GetNullarySelector("load")) != 0;
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::GetClassSizeInfo(const ObjCImplementationDecl *OID,
|
|
uint32_t &InstanceStart,
|
|
uint32_t &InstanceSize) {
|
|
const ASTRecordLayout &RL =
|
|
CGM.getContext().getASTObjCImplementationLayout(OID);
|
|
|
|
// InstanceSize is really instance end.
|
|
InstanceSize = RL.getDataSize().getQuantity();
|
|
|
|
// If there are no fields, the start is the same as the end.
|
|
if (!RL.getFieldCount())
|
|
InstanceStart = InstanceSize;
|
|
else
|
|
InstanceStart = RL.getFieldOffset(0) / CGM.getContext().getCharWidth();
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
|
|
std::string ClassName = ID->getNameAsString();
|
|
if (!ObjCEmptyCacheVar) {
|
|
ObjCEmptyCacheVar = new llvm::GlobalVariable(
|
|
CGM.getModule(),
|
|
ObjCTypes.CacheTy,
|
|
false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
"_objc_empty_cache");
|
|
|
|
ObjCEmptyVtableVar = new llvm::GlobalVariable(
|
|
CGM.getModule(),
|
|
ObjCTypes.ImpnfABITy,
|
|
false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
"_objc_empty_vtable");
|
|
}
|
|
assert(ID->getClassInterface() &&
|
|
"CGObjCNonFragileABIMac::GenerateClass - class is 0");
|
|
// FIXME: Is this correct (that meta class size is never computed)?
|
|
uint32_t InstanceStart =
|
|
CGM.getTargetData().getTypeAllocSize(ObjCTypes.ClassnfABITy);
|
|
uint32_t InstanceSize = InstanceStart;
|
|
uint32_t flags = CLS_META;
|
|
std::string ObjCMetaClassName(getMetaclassSymbolPrefix());
|
|
std::string ObjCClassName(getClassSymbolPrefix());
|
|
|
|
llvm::GlobalVariable *SuperClassGV, *IsAGV;
|
|
|
|
bool classIsHidden =
|
|
ID->getClassInterface()->getVisibility() == HiddenVisibility;
|
|
if (classIsHidden)
|
|
flags |= OBJC2_CLS_HIDDEN;
|
|
if (ID->hasCXXStructors())
|
|
flags |= eClassFlags_ABI2_HasCXXStructors;
|
|
if (!ID->getClassInterface()->getSuperClass()) {
|
|
// class is root
|
|
flags |= CLS_ROOT;
|
|
SuperClassGV = GetClassGlobal(ObjCClassName + ClassName);
|
|
IsAGV = GetClassGlobal(ObjCMetaClassName + ClassName);
|
|
} else {
|
|
// Has a root. Current class is not a root.
|
|
const ObjCInterfaceDecl *Root = ID->getClassInterface();
|
|
while (const ObjCInterfaceDecl *Super = Root->getSuperClass())
|
|
Root = Super;
|
|
IsAGV = GetClassGlobal(ObjCMetaClassName + Root->getNameAsString());
|
|
if (Root->isWeakImported())
|
|
IsAGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
|
|
// work on super class metadata symbol.
|
|
std::string SuperClassName =
|
|
ObjCMetaClassName +
|
|
ID->getClassInterface()->getSuperClass()->getNameAsString();
|
|
SuperClassGV = GetClassGlobal(SuperClassName);
|
|
if (ID->getClassInterface()->getSuperClass()->isWeakImported())
|
|
SuperClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
|
|
}
|
|
llvm::GlobalVariable *CLASS_RO_GV = BuildClassRoTInitializer(flags,
|
|
InstanceStart,
|
|
InstanceSize,ID);
|
|
std::string TClassName = ObjCMetaClassName + ClassName;
|
|
llvm::GlobalVariable *MetaTClass =
|
|
BuildClassMetaData(TClassName, IsAGV, SuperClassGV, CLASS_RO_GV,
|
|
classIsHidden);
|
|
DefinedMetaClasses.push_back(MetaTClass);
|
|
|
|
// Metadata for the class
|
|
flags = CLS;
|
|
if (classIsHidden)
|
|
flags |= OBJC2_CLS_HIDDEN;
|
|
if (ID->hasCXXStructors())
|
|
flags |= eClassFlags_ABI2_HasCXXStructors;
|
|
|
|
if (hasObjCExceptionAttribute(CGM.getContext(), ID->getClassInterface()))
|
|
flags |= CLS_EXCEPTION;
|
|
|
|
if (!ID->getClassInterface()->getSuperClass()) {
|
|
flags |= CLS_ROOT;
|
|
SuperClassGV = 0;
|
|
} else {
|
|
// Has a root. Current class is not a root.
|
|
std::string RootClassName =
|
|
ID->getClassInterface()->getSuperClass()->getNameAsString();
|
|
SuperClassGV = GetClassGlobal(ObjCClassName + RootClassName);
|
|
if (ID->getClassInterface()->getSuperClass()->isWeakImported())
|
|
SuperClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
|
|
}
|
|
GetClassSizeInfo(ID, InstanceStart, InstanceSize);
|
|
CLASS_RO_GV = BuildClassRoTInitializer(flags,
|
|
InstanceStart,
|
|
InstanceSize,
|
|
ID);
|
|
|
|
TClassName = ObjCClassName + ClassName;
|
|
llvm::GlobalVariable *ClassMD =
|
|
BuildClassMetaData(TClassName, MetaTClass, SuperClassGV, CLASS_RO_GV,
|
|
classIsHidden);
|
|
DefinedClasses.push_back(ClassMD);
|
|
|
|
// Determine if this class is also "non-lazy".
|
|
if (ImplementationIsNonLazy(ID))
|
|
DefinedNonLazyClasses.push_back(ClassMD);
|
|
|
|
// Force the definition of the EHType if necessary.
|
|
if (flags & CLS_EXCEPTION)
|
|
GetInterfaceEHType(ID->getClassInterface(), true);
|
|
// Make sure method definition entries are all clear for next implementation.
|
|
MethodDefinitions.clear();
|
|
}
|
|
|
|
/// GenerateProtocolRef - This routine is called to generate code for
|
|
/// a protocol reference expression; as in:
|
|
/// @code
|
|
/// @protocol(Proto1);
|
|
/// @endcode
|
|
/// It generates a weak reference to l_OBJC_PROTOCOL_REFERENCE_$_Proto1
|
|
/// which will hold address of the protocol meta-data.
|
|
///
|
|
llvm::Value *CGObjCNonFragileABIMac::GenerateProtocolRef(CGBuilderTy &Builder,
|
|
const ObjCProtocolDecl *PD) {
|
|
|
|
// This routine is called for @protocol only. So, we must build definition
|
|
// of protocol's meta-data (not a reference to it!)
|
|
//
|
|
llvm::Constant *Init =
|
|
llvm::ConstantExpr::getBitCast(GetOrEmitProtocol(PD),
|
|
ObjCTypes.ExternalProtocolPtrTy);
|
|
|
|
std::string ProtocolName("\01l_OBJC_PROTOCOL_REFERENCE_$_");
|
|
ProtocolName += PD->getName();
|
|
|
|
llvm::GlobalVariable *PTGV = CGM.getModule().getGlobalVariable(ProtocolName);
|
|
if (PTGV)
|
|
return Builder.CreateLoad(PTGV);
|
|
PTGV = new llvm::GlobalVariable(
|
|
CGM.getModule(),
|
|
Init->getType(), false,
|
|
llvm::GlobalValue::WeakAnyLinkage,
|
|
Init,
|
|
ProtocolName);
|
|
PTGV->setSection("__DATA, __objc_protorefs, coalesced, no_dead_strip");
|
|
PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
CGM.AddUsedGlobal(PTGV);
|
|
return Builder.CreateLoad(PTGV);
|
|
}
|
|
|
|
/// GenerateCategory - Build metadata for a category implementation.
|
|
/// struct _category_t {
|
|
/// const char * const name;
|
|
/// struct _class_t *const cls;
|
|
/// const struct _method_list_t * const instance_methods;
|
|
/// const struct _method_list_t * const class_methods;
|
|
/// const struct _protocol_list_t * const protocols;
|
|
/// const struct _prop_list_t * const properties;
|
|
/// }
|
|
///
|
|
void CGObjCNonFragileABIMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) {
|
|
const ObjCInterfaceDecl *Interface = OCD->getClassInterface();
|
|
const char *Prefix = "\01l_OBJC_$_CATEGORY_";
|
|
std::string ExtCatName(Prefix + Interface->getNameAsString()+
|
|
"_$_" + OCD->getNameAsString());
|
|
std::string ExtClassName(getClassSymbolPrefix() +
|
|
Interface->getNameAsString());
|
|
|
|
llvm::Constant *Values[6];
|
|
Values[0] = GetClassName(OCD->getIdentifier());
|
|
// meta-class entry symbol
|
|
llvm::GlobalVariable *ClassGV = GetClassGlobal(ExtClassName);
|
|
if (Interface->isWeakImported())
|
|
ClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
|
|
|
|
Values[1] = ClassGV;
|
|
std::vector<llvm::Constant*> Methods;
|
|
std::string MethodListName(Prefix);
|
|
MethodListName += "INSTANCE_METHODS_" + Interface->getNameAsString() +
|
|
"_$_" + OCD->getNameAsString();
|
|
|
|
for (ObjCCategoryImplDecl::instmeth_iterator
|
|
i = OCD->instmeth_begin(), e = OCD->instmeth_end(); i != e; ++i) {
|
|
// Instance methods should always be defined.
|
|
Methods.push_back(GetMethodConstant(*i));
|
|
}
|
|
|
|
Values[2] = EmitMethodList(MethodListName,
|
|
"__DATA, __objc_const",
|
|
Methods);
|
|
|
|
MethodListName = Prefix;
|
|
MethodListName += "CLASS_METHODS_" + Interface->getNameAsString() + "_$_" +
|
|
OCD->getNameAsString();
|
|
Methods.clear();
|
|
for (ObjCCategoryImplDecl::classmeth_iterator
|
|
i = OCD->classmeth_begin(), e = OCD->classmeth_end(); i != e; ++i) {
|
|
// Class methods should always be defined.
|
|
Methods.push_back(GetMethodConstant(*i));
|
|
}
|
|
|
|
Values[3] = EmitMethodList(MethodListName,
|
|
"__DATA, __objc_const",
|
|
Methods);
|
|
const ObjCCategoryDecl *Category =
|
|
Interface->FindCategoryDeclaration(OCD->getIdentifier());
|
|
if (Category) {
|
|
llvm::SmallString<256> ExtName;
|
|
llvm::raw_svector_ostream(ExtName) << Interface->getName() << "_$_"
|
|
<< OCD->getName();
|
|
Values[4] = EmitProtocolList("\01l_OBJC_CATEGORY_PROTOCOLS_$_"
|
|
+ Interface->getName() + "_$_"
|
|
+ Category->getName(),
|
|
Category->protocol_begin(),
|
|
Category->protocol_end());
|
|
Values[5] = EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ExtName.str(),
|
|
OCD, Category, ObjCTypes);
|
|
} else {
|
|
Values[4] = llvm::Constant::getNullValue(ObjCTypes.ProtocolListnfABIPtrTy);
|
|
Values[5] = llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
|
|
}
|
|
|
|
llvm::Constant *Init =
|
|
llvm::ConstantStruct::get(ObjCTypes.CategorynfABITy,
|
|
Values);
|
|
llvm::GlobalVariable *GCATV
|
|
= new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.CategorynfABITy,
|
|
false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init,
|
|
ExtCatName);
|
|
GCATV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.CategorynfABITy));
|
|
GCATV->setSection("__DATA, __objc_const");
|
|
CGM.AddUsedGlobal(GCATV);
|
|
DefinedCategories.push_back(GCATV);
|
|
|
|
// Determine if this category is also "non-lazy".
|
|
if (ImplementationIsNonLazy(OCD))
|
|
DefinedNonLazyCategories.push_back(GCATV);
|
|
// method definition entries must be clear for next implementation.
|
|
MethodDefinitions.clear();
|
|
}
|
|
|
|
/// GetMethodConstant - Return a struct objc_method constant for the
|
|
/// given method if it has been defined. The result is null if the
|
|
/// method has not been defined. The return value has type MethodPtrTy.
|
|
llvm::Constant *CGObjCNonFragileABIMac::GetMethodConstant(
|
|
const ObjCMethodDecl *MD) {
|
|
llvm::Function *Fn = GetMethodDefinition(MD);
|
|
if (!Fn)
|
|
return 0;
|
|
|
|
llvm::Constant *Method[] = {
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()),
|
|
ObjCTypes.SelectorPtrTy),
|
|
GetMethodVarType(MD),
|
|
llvm::ConstantExpr::getBitCast(Fn, ObjCTypes.Int8PtrTy)
|
|
};
|
|
return llvm::ConstantStruct::get(ObjCTypes.MethodTy, Method);
|
|
}
|
|
|
|
/// EmitMethodList - Build meta-data for method declarations
|
|
/// struct _method_list_t {
|
|
/// uint32_t entsize; // sizeof(struct _objc_method)
|
|
/// uint32_t method_count;
|
|
/// struct _objc_method method_list[method_count];
|
|
/// }
|
|
///
|
|
llvm::Constant *CGObjCNonFragileABIMac::EmitMethodList(Twine Name,
|
|
const char *Section,
|
|
const ConstantVector &Methods) {
|
|
// Return null for empty list.
|
|
if (Methods.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.MethodListnfABIPtrTy);
|
|
|
|
llvm::Constant *Values[3];
|
|
// sizeof(struct _objc_method)
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(ObjCTypes.MethodTy);
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
// method_count
|
|
Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Methods.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.MethodTy,
|
|
Methods.size());
|
|
Values[2] = llvm::ConstantArray::get(AT, Methods);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
|
|
llvm::GlobalVariable *GV =
|
|
new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
|
|
llvm::GlobalValue::InternalLinkage, Init, Name);
|
|
GV->setAlignment(CGM.getTargetData().getABITypeAlignment(Init->getType()));
|
|
GV->setSection(Section);
|
|
CGM.AddUsedGlobal(GV);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListnfABIPtrTy);
|
|
}
|
|
|
|
/// ObjCIvarOffsetVariable - Returns the ivar offset variable for
|
|
/// the given ivar.
|
|
llvm::GlobalVariable *
|
|
CGObjCNonFragileABIMac::ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID,
|
|
const ObjCIvarDecl *Ivar) {
|
|
const ObjCInterfaceDecl *Container = Ivar->getContainingInterface();
|
|
std::string Name = "OBJC_IVAR_$_" + Container->getNameAsString() +
|
|
'.' + Ivar->getNameAsString();
|
|
llvm::GlobalVariable *IvarOffsetGV =
|
|
CGM.getModule().getGlobalVariable(Name);
|
|
if (!IvarOffsetGV)
|
|
IvarOffsetGV =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.LongTy,
|
|
false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
Name);
|
|
return IvarOffsetGV;
|
|
}
|
|
|
|
llvm::Constant *
|
|
CGObjCNonFragileABIMac::EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned long int Offset) {
|
|
llvm::GlobalVariable *IvarOffsetGV = ObjCIvarOffsetVariable(ID, Ivar);
|
|
IvarOffsetGV->setInitializer(llvm::ConstantInt::get(ObjCTypes.LongTy,
|
|
Offset));
|
|
IvarOffsetGV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.LongTy));
|
|
|
|
// FIXME: This matches gcc, but shouldn't the visibility be set on the use as
|
|
// well (i.e., in ObjCIvarOffsetVariable).
|
|
if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
|
|
Ivar->getAccessControl() == ObjCIvarDecl::Package ||
|
|
ID->getVisibility() == HiddenVisibility)
|
|
IvarOffsetGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
else
|
|
IvarOffsetGV->setVisibility(llvm::GlobalValue::DefaultVisibility);
|
|
IvarOffsetGV->setSection("__DATA, __objc_ivar");
|
|
return IvarOffsetGV;
|
|
}
|
|
|
|
/// EmitIvarList - Emit the ivar list for the given
|
|
/// implementation. The return value has type
|
|
/// IvarListnfABIPtrTy.
|
|
/// struct _ivar_t {
|
|
/// unsigned long int *offset; // pointer to ivar offset location
|
|
/// char *name;
|
|
/// char *type;
|
|
/// uint32_t alignment;
|
|
/// uint32_t size;
|
|
/// }
|
|
/// struct _ivar_list_t {
|
|
/// uint32 entsize; // sizeof(struct _ivar_t)
|
|
/// uint32 count;
|
|
/// struct _iver_t list[count];
|
|
/// }
|
|
///
|
|
|
|
llvm::Constant *CGObjCNonFragileABIMac::EmitIvarList(
|
|
const ObjCImplementationDecl *ID) {
|
|
|
|
std::vector<llvm::Constant*> Ivars;
|
|
|
|
const ObjCInterfaceDecl *OID = ID->getClassInterface();
|
|
assert(OID && "CGObjCNonFragileABIMac::EmitIvarList - null interface");
|
|
|
|
// FIXME. Consolidate this with similar code in GenerateClass.
|
|
|
|
for (const ObjCIvarDecl *IVD = OID->all_declared_ivar_begin();
|
|
IVD; IVD = IVD->getNextIvar()) {
|
|
// Ignore unnamed bit-fields.
|
|
if (!IVD->getDeclName())
|
|
continue;
|
|
llvm::Constant *Ivar[5];
|
|
Ivar[0] = EmitIvarOffsetVar(ID->getClassInterface(), IVD,
|
|
ComputeIvarBaseOffset(CGM, ID, IVD));
|
|
Ivar[1] = GetMethodVarName(IVD->getIdentifier());
|
|
Ivar[2] = GetMethodVarType(IVD);
|
|
llvm::Type *FieldTy =
|
|
CGM.getTypes().ConvertTypeForMem(IVD->getType());
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(FieldTy);
|
|
unsigned Align = CGM.getContext().getPreferredTypeAlign(
|
|
IVD->getType().getTypePtr()) >> 3;
|
|
Align = llvm::Log2_32(Align);
|
|
Ivar[3] = llvm::ConstantInt::get(ObjCTypes.IntTy, Align);
|
|
// NOTE. Size of a bitfield does not match gcc's, because of the
|
|
// way bitfields are treated special in each. But I am told that
|
|
// 'size' for bitfield ivars is ignored by the runtime so it does
|
|
// not matter. If it matters, there is enough info to get the
|
|
// bitfield right!
|
|
Ivar[4] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
Ivars.push_back(llvm::ConstantStruct::get(ObjCTypes.IvarnfABITy, Ivar));
|
|
}
|
|
// Return null for empty list.
|
|
if (Ivars.empty())
|
|
return llvm::Constant::getNullValue(ObjCTypes.IvarListnfABIPtrTy);
|
|
|
|
llvm::Constant *Values[3];
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(ObjCTypes.IvarnfABITy);
|
|
Values[0] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
Values[1] = llvm::ConstantInt::get(ObjCTypes.IntTy, Ivars.size());
|
|
llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.IvarnfABITy,
|
|
Ivars.size());
|
|
Values[2] = llvm::ConstantArray::get(AT, Ivars);
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
const char *Prefix = "\01l_OBJC_$_INSTANCE_VARIABLES_";
|
|
llvm::GlobalVariable *GV =
|
|
new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init,
|
|
Prefix + OID->getName());
|
|
GV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(Init->getType()));
|
|
GV->setSection("__DATA, __objc_const");
|
|
|
|
CGM.AddUsedGlobal(GV);
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListnfABIPtrTy);
|
|
}
|
|
|
|
llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocolRef(
|
|
const ObjCProtocolDecl *PD) {
|
|
llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
|
|
|
|
if (!Entry) {
|
|
// We use the initializer as a marker of whether this is a forward
|
|
// reference or not. At module finalization we add the empty
|
|
// contents for protocols which were referenced but never defined.
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABITy, false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
"\01l_OBJC_PROTOCOL_$_" + PD->getName());
|
|
Entry->setSection("__DATA,__datacoal_nt,coalesced");
|
|
}
|
|
|
|
return Entry;
|
|
}
|
|
|
|
/// GetOrEmitProtocol - Generate the protocol meta-data:
|
|
/// @code
|
|
/// struct _protocol_t {
|
|
/// id isa; // NULL
|
|
/// const char * const protocol_name;
|
|
/// const struct _protocol_list_t * protocol_list; // super protocols
|
|
/// const struct method_list_t * const instance_methods;
|
|
/// const struct method_list_t * const class_methods;
|
|
/// const struct method_list_t *optionalInstanceMethods;
|
|
/// const struct method_list_t *optionalClassMethods;
|
|
/// const struct _prop_list_t * properties;
|
|
/// const uint32_t size; // sizeof(struct _protocol_t)
|
|
/// const uint32_t flags; // = 0
|
|
/// }
|
|
/// @endcode
|
|
///
|
|
|
|
llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocol(
|
|
const ObjCProtocolDecl *PD) {
|
|
llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
|
|
|
|
// Early exit if a defining object has already been generated.
|
|
if (Entry && Entry->hasInitializer())
|
|
return Entry;
|
|
|
|
// Construct method lists.
|
|
std::vector<llvm::Constant*> InstanceMethods, ClassMethods;
|
|
std::vector<llvm::Constant*> OptInstanceMethods, OptClassMethods;
|
|
for (ObjCProtocolDecl::instmeth_iterator
|
|
i = PD->instmeth_begin(), e = PD->instmeth_end(); i != e; ++i) {
|
|
ObjCMethodDecl *MD = *i;
|
|
llvm::Constant *C = GetMethodDescriptionConstant(MD);
|
|
if (!C)
|
|
return GetOrEmitProtocolRef(PD);
|
|
|
|
if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
|
|
OptInstanceMethods.push_back(C);
|
|
} else {
|
|
InstanceMethods.push_back(C);
|
|
}
|
|
}
|
|
|
|
for (ObjCProtocolDecl::classmeth_iterator
|
|
i = PD->classmeth_begin(), e = PD->classmeth_end(); i != e; ++i) {
|
|
ObjCMethodDecl *MD = *i;
|
|
llvm::Constant *C = GetMethodDescriptionConstant(MD);
|
|
if (!C)
|
|
return GetOrEmitProtocolRef(PD);
|
|
|
|
if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
|
|
OptClassMethods.push_back(C);
|
|
} else {
|
|
ClassMethods.push_back(C);
|
|
}
|
|
}
|
|
|
|
llvm::Constant *Values[10];
|
|
// isa is NULL
|
|
Values[0] = llvm::Constant::getNullValue(ObjCTypes.ObjectPtrTy);
|
|
Values[1] = GetClassName(PD->getIdentifier());
|
|
Values[2] = EmitProtocolList("\01l_OBJC_$_PROTOCOL_REFS_" + PD->getName(),
|
|
PD->protocol_begin(),
|
|
PD->protocol_end());
|
|
|
|
Values[3] = EmitMethodList("\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_"
|
|
+ PD->getName(),
|
|
"__DATA, __objc_const",
|
|
InstanceMethods);
|
|
Values[4] = EmitMethodList("\01l_OBJC_$_PROTOCOL_CLASS_METHODS_"
|
|
+ PD->getName(),
|
|
"__DATA, __objc_const",
|
|
ClassMethods);
|
|
Values[5] = EmitMethodList("\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_OPT_"
|
|
+ PD->getName(),
|
|
"__DATA, __objc_const",
|
|
OptInstanceMethods);
|
|
Values[6] = EmitMethodList("\01l_OBJC_$_PROTOCOL_CLASS_METHODS_OPT_"
|
|
+ PD->getName(),
|
|
"__DATA, __objc_const",
|
|
OptClassMethods);
|
|
Values[7] = EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + PD->getName(),
|
|
0, PD, ObjCTypes);
|
|
uint32_t Size =
|
|
CGM.getTargetData().getTypeAllocSize(ObjCTypes.ProtocolnfABITy);
|
|
Values[8] = llvm::ConstantInt::get(ObjCTypes.IntTy, Size);
|
|
Values[9] = llvm::Constant::getNullValue(ObjCTypes.IntTy);
|
|
llvm::Constant *Init = llvm::ConstantStruct::get(ObjCTypes.ProtocolnfABITy,
|
|
Values);
|
|
|
|
if (Entry) {
|
|
// Already created, fix the linkage and update the initializer.
|
|
Entry->setLinkage(llvm::GlobalValue::WeakAnyLinkage);
|
|
Entry->setInitializer(Init);
|
|
} else {
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABITy,
|
|
false, llvm::GlobalValue::WeakAnyLinkage, Init,
|
|
"\01l_OBJC_PROTOCOL_$_" + PD->getName());
|
|
Entry->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.ProtocolnfABITy));
|
|
Entry->setSection("__DATA,__datacoal_nt,coalesced");
|
|
}
|
|
Entry->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
CGM.AddUsedGlobal(Entry);
|
|
|
|
// Use this protocol meta-data to build protocol list table in section
|
|
// __DATA, __objc_protolist
|
|
llvm::GlobalVariable *PTGV =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABIPtrTy,
|
|
false, llvm::GlobalValue::WeakAnyLinkage, Entry,
|
|
"\01l_OBJC_LABEL_PROTOCOL_$_" + PD->getName());
|
|
PTGV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(ObjCTypes.ProtocolnfABIPtrTy));
|
|
PTGV->setSection("__DATA, __objc_protolist, coalesced, no_dead_strip");
|
|
PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
CGM.AddUsedGlobal(PTGV);
|
|
return Entry;
|
|
}
|
|
|
|
/// EmitProtocolList - Generate protocol list meta-data:
|
|
/// @code
|
|
/// struct _protocol_list_t {
|
|
/// long protocol_count; // Note, this is 32/64 bit
|
|
/// struct _protocol_t[protocol_count];
|
|
/// }
|
|
/// @endcode
|
|
///
|
|
llvm::Constant *
|
|
CGObjCNonFragileABIMac::EmitProtocolList(Twine Name,
|
|
ObjCProtocolDecl::protocol_iterator begin,
|
|
ObjCProtocolDecl::protocol_iterator end) {
|
|
std::vector<llvm::Constant*> ProtocolRefs;
|
|
|
|
// Just return null for empty protocol lists
|
|
if (begin == end)
|
|
return llvm::Constant::getNullValue(ObjCTypes.ProtocolListnfABIPtrTy);
|
|
|
|
// FIXME: We shouldn't need to do this lookup here, should we?
|
|
llvm::SmallString<256> TmpName;
|
|
Name.toVector(TmpName);
|
|
llvm::GlobalVariable *GV =
|
|
CGM.getModule().getGlobalVariable(TmpName.str(), true);
|
|
if (GV)
|
|
return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListnfABIPtrTy);
|
|
|
|
for (; begin != end; ++begin)
|
|
ProtocolRefs.push_back(GetProtocolRef(*begin)); // Implemented???
|
|
|
|
// This list is null terminated.
|
|
ProtocolRefs.push_back(llvm::Constant::getNullValue(
|
|
ObjCTypes.ProtocolnfABIPtrTy));
|
|
|
|
llvm::Constant *Values[2];
|
|
Values[0] =
|
|
llvm::ConstantInt::get(ObjCTypes.LongTy, ProtocolRefs.size() - 1);
|
|
Values[1] =
|
|
llvm::ConstantArray::get(
|
|
llvm::ArrayType::get(ObjCTypes.ProtocolnfABIPtrTy,
|
|
ProtocolRefs.size()),
|
|
ProtocolRefs);
|
|
|
|
llvm::Constant *Init = llvm::ConstantStruct::getAnon(Values);
|
|
GV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Init, Name);
|
|
GV->setSection("__DATA, __objc_const");
|
|
GV->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(Init->getType()));
|
|
CGM.AddUsedGlobal(GV);
|
|
return llvm::ConstantExpr::getBitCast(GV,
|
|
ObjCTypes.ProtocolListnfABIPtrTy);
|
|
}
|
|
|
|
/// GetMethodDescriptionConstant - This routine build following meta-data:
|
|
/// struct _objc_method {
|
|
/// SEL _cmd;
|
|
/// char *method_type;
|
|
/// char *_imp;
|
|
/// }
|
|
|
|
llvm::Constant *
|
|
CGObjCNonFragileABIMac::GetMethodDescriptionConstant(const ObjCMethodDecl *MD) {
|
|
llvm::Constant *Desc[3];
|
|
Desc[0] =
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(MD->getSelector()),
|
|
ObjCTypes.SelectorPtrTy);
|
|
Desc[1] = GetMethodVarType(MD);
|
|
if (!Desc[1])
|
|
return 0;
|
|
|
|
// Protocol methods have no implementation. So, this entry is always NULL.
|
|
Desc[2] = llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
|
|
return llvm::ConstantStruct::get(ObjCTypes.MethodTy, Desc);
|
|
}
|
|
|
|
/// EmitObjCValueForIvar - Code Gen for nonfragile ivar reference.
|
|
/// This code gen. amounts to generating code for:
|
|
/// @code
|
|
/// (type *)((char *)base + _OBJC_IVAR_$_.ivar;
|
|
/// @encode
|
|
///
|
|
LValue CGObjCNonFragileABIMac::EmitObjCValueForIvar(
|
|
CodeGen::CodeGenFunction &CGF,
|
|
QualType ObjectTy,
|
|
llvm::Value *BaseValue,
|
|
const ObjCIvarDecl *Ivar,
|
|
unsigned CVRQualifiers) {
|
|
ObjCInterfaceDecl *ID = ObjectTy->getAs<ObjCObjectType>()->getInterface();
|
|
return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers,
|
|
EmitIvarOffset(CGF, ID, Ivar));
|
|
}
|
|
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitIvarOffset(
|
|
CodeGen::CodeGenFunction &CGF,
|
|
const ObjCInterfaceDecl *Interface,
|
|
const ObjCIvarDecl *Ivar) {
|
|
return CGF.Builder.CreateLoad(ObjCIvarOffsetVariable(Interface, Ivar),"ivar");
|
|
}
|
|
|
|
static void appendSelectorForMessageRefTable(std::string &buffer,
|
|
Selector selector) {
|
|
if (selector.isUnarySelector()) {
|
|
buffer += selector.getNameForSlot(0);
|
|
return;
|
|
}
|
|
|
|
for (unsigned i = 0, e = selector.getNumArgs(); i != e; ++i) {
|
|
buffer += selector.getNameForSlot(i);
|
|
buffer += '_';
|
|
}
|
|
}
|
|
|
|
/// Emit a "v-table" message send. We emit a weak hidden-visibility
|
|
/// struct, initially containing the selector pointer and a pointer to
|
|
/// a "fixup" variant of the appropriate objc_msgSend. To call, we
|
|
/// load and call the function pointer, passing the address of the
|
|
/// struct as the second parameter. The runtime determines whether
|
|
/// the selector is currently emitted using vtable dispatch; if so, it
|
|
/// substitutes a stub function which simply tail-calls through the
|
|
/// appropriate vtable slot, and if not, it substitues a stub function
|
|
/// which tail-calls objc_msgSend. Both stubs adjust the selector
|
|
/// argument to correctly point to the selector.
|
|
RValue
|
|
CGObjCNonFragileABIMac::EmitVTableMessageSend(CodeGenFunction &CGF,
|
|
ReturnValueSlot returnSlot,
|
|
QualType resultType,
|
|
Selector selector,
|
|
llvm::Value *arg0,
|
|
QualType arg0Type,
|
|
bool isSuper,
|
|
const CallArgList &formalArgs,
|
|
const ObjCMethodDecl *method) {
|
|
// Compute the actual arguments.
|
|
CallArgList args;
|
|
|
|
// First argument: the receiver / super-call structure.
|
|
if (!isSuper)
|
|
arg0 = CGF.Builder.CreateBitCast(arg0, ObjCTypes.ObjectPtrTy);
|
|
args.add(RValue::get(arg0), arg0Type);
|
|
|
|
// Second argument: a pointer to the message ref structure. Leave
|
|
// the actual argument value blank for now.
|
|
args.add(RValue::get(0), ObjCTypes.MessageRefCPtrTy);
|
|
|
|
args.insert(args.end(), formalArgs.begin(), formalArgs.end());
|
|
|
|
const CGFunctionInfo &fnInfo =
|
|
CGM.getTypes().getFunctionInfo(resultType, args,
|
|
FunctionType::ExtInfo());
|
|
|
|
NullReturnState nullReturn;
|
|
|
|
// Find the function to call and the mangled name for the message
|
|
// ref structure. Using a different mangled name wouldn't actually
|
|
// be a problem; it would just be a waste.
|
|
//
|
|
// The runtime currently never uses vtable dispatch for anything
|
|
// except normal, non-super message-sends.
|
|
// FIXME: don't use this for that.
|
|
llvm::Constant *fn = 0;
|
|
std::string messageRefName("\01l_");
|
|
if (CGM.ReturnTypeUsesSRet(fnInfo)) {
|
|
if (isSuper) {
|
|
fn = ObjCTypes.getMessageSendSuper2StretFixupFn();
|
|
messageRefName += "objc_msgSendSuper2_stret_fixup";
|
|
} else {
|
|
nullReturn.init(CGF, arg0);
|
|
fn = ObjCTypes.getMessageSendStretFixupFn();
|
|
messageRefName += "objc_msgSend_stret_fixup";
|
|
}
|
|
} else if (!isSuper && CGM.ReturnTypeUsesFPRet(resultType)) {
|
|
fn = ObjCTypes.getMessageSendFpretFixupFn();
|
|
messageRefName += "objc_msgSend_fpret_fixup";
|
|
} else {
|
|
if (isSuper) {
|
|
fn = ObjCTypes.getMessageSendSuper2FixupFn();
|
|
messageRefName += "objc_msgSendSuper2_fixup";
|
|
} else {
|
|
fn = ObjCTypes.getMessageSendFixupFn();
|
|
messageRefName += "objc_msgSend_fixup";
|
|
}
|
|
}
|
|
assert(fn && "CGObjCNonFragileABIMac::EmitMessageSend");
|
|
messageRefName += '_';
|
|
|
|
// Append the selector name, except use underscores anywhere we
|
|
// would have used colons.
|
|
appendSelectorForMessageRefTable(messageRefName, selector);
|
|
|
|
llvm::GlobalVariable *messageRef
|
|
= CGM.getModule().getGlobalVariable(messageRefName);
|
|
if (!messageRef) {
|
|
// Build the message ref structure.
|
|
llvm::Constant *values[] = { fn, GetMethodVarName(selector) };
|
|
llvm::Constant *init = llvm::ConstantStruct::getAnon(values);
|
|
messageRef = new llvm::GlobalVariable(CGM.getModule(),
|
|
init->getType(),
|
|
/*constant*/ false,
|
|
llvm::GlobalValue::WeakAnyLinkage,
|
|
init,
|
|
messageRefName);
|
|
messageRef->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
messageRef->setAlignment(16);
|
|
messageRef->setSection("__DATA, __objc_msgrefs, coalesced");
|
|
}
|
|
llvm::Value *mref =
|
|
CGF.Builder.CreateBitCast(messageRef, ObjCTypes.MessageRefPtrTy);
|
|
|
|
// Update the message ref argument.
|
|
args[1].RV = RValue::get(mref);
|
|
|
|
// Load the function to call from the message ref table.
|
|
llvm::Value *callee = CGF.Builder.CreateStructGEP(mref, 0);
|
|
callee = CGF.Builder.CreateLoad(callee, "msgSend_fn");
|
|
|
|
bool variadic = method ? method->isVariadic() : false;
|
|
llvm::FunctionType *fnType =
|
|
CGF.getTypes().GetFunctionType(fnInfo, variadic);
|
|
callee = CGF.Builder.CreateBitCast(callee,
|
|
llvm::PointerType::getUnqual(fnType));
|
|
|
|
RValue result = CGF.EmitCall(fnInfo, callee, returnSlot, args);
|
|
return nullReturn.complete(CGF, result, resultType);
|
|
}
|
|
|
|
/// Generate code for a message send expression in the nonfragile abi.
|
|
CodeGen::RValue
|
|
CGObjCNonFragileABIMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
llvm::Value *Receiver,
|
|
const CallArgList &CallArgs,
|
|
const ObjCInterfaceDecl *Class,
|
|
const ObjCMethodDecl *Method) {
|
|
return isVTableDispatchedSelector(Sel)
|
|
? EmitVTableMessageSend(CGF, Return, ResultType, Sel,
|
|
Receiver, CGF.getContext().getObjCIdType(),
|
|
false, CallArgs, Method)
|
|
: EmitMessageSend(CGF, Return, ResultType,
|
|
EmitSelector(CGF.Builder, Sel),
|
|
Receiver, CGF.getContext().getObjCIdType(),
|
|
false, CallArgs, Method, ObjCTypes);
|
|
}
|
|
|
|
llvm::GlobalVariable *
|
|
CGObjCNonFragileABIMac::GetClassGlobal(const std::string &Name) {
|
|
llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name);
|
|
|
|
if (!GV) {
|
|
GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABITy,
|
|
false, llvm::GlobalValue::ExternalLinkage,
|
|
0, Name);
|
|
}
|
|
|
|
return GV;
|
|
}
|
|
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitClassRefFromId(CGBuilderTy &Builder,
|
|
IdentifierInfo *II) {
|
|
llvm::GlobalVariable *&Entry = ClassReferences[II];
|
|
|
|
if (!Entry) {
|
|
std::string ClassName(getClassSymbolPrefix() + II->getName().str());
|
|
llvm::GlobalVariable *ClassGV = GetClassGlobal(ClassName);
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy,
|
|
false, llvm::GlobalValue::InternalLinkage,
|
|
ClassGV,
|
|
"\01L_OBJC_CLASSLIST_REFERENCES_$_");
|
|
Entry->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(
|
|
ObjCTypes.ClassnfABIPtrTy));
|
|
Entry->setSection("__DATA, __objc_classrefs, regular, no_dead_strip");
|
|
CGM.AddUsedGlobal(Entry);
|
|
}
|
|
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
return EmitClassRefFromId(Builder, ID->getIdentifier());
|
|
}
|
|
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitNSAutoreleasePoolClassRef(
|
|
CGBuilderTy &Builder) {
|
|
IdentifierInfo *II = &CGM.getContext().Idents.get("NSAutoreleasePool");
|
|
return EmitClassRefFromId(Builder, II);
|
|
}
|
|
|
|
llvm::Value *
|
|
CGObjCNonFragileABIMac::EmitSuperClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
llvm::GlobalVariable *&Entry = SuperClassReferences[ID->getIdentifier()];
|
|
|
|
if (!Entry) {
|
|
std::string ClassName(getClassSymbolPrefix() + ID->getNameAsString());
|
|
llvm::GlobalVariable *ClassGV = GetClassGlobal(ClassName);
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy,
|
|
false, llvm::GlobalValue::InternalLinkage,
|
|
ClassGV,
|
|
"\01L_OBJC_CLASSLIST_SUP_REFS_$_");
|
|
Entry->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(
|
|
ObjCTypes.ClassnfABIPtrTy));
|
|
Entry->setSection("__DATA, __objc_superrefs, regular, no_dead_strip");
|
|
CGM.AddUsedGlobal(Entry);
|
|
}
|
|
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
|
|
/// EmitMetaClassRef - Return a Value * of the address of _class_t
|
|
/// meta-data
|
|
///
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitMetaClassRef(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
llvm::GlobalVariable * &Entry = MetaClassReferences[ID->getIdentifier()];
|
|
if (Entry)
|
|
return Builder.CreateLoad(Entry);
|
|
|
|
std::string MetaClassName(getMetaclassSymbolPrefix() + ID->getNameAsString());
|
|
llvm::GlobalVariable *MetaClassGV = GetClassGlobal(MetaClassName);
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy, false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
MetaClassGV,
|
|
"\01L_OBJC_CLASSLIST_SUP_REFS_$_");
|
|
Entry->setAlignment(
|
|
CGM.getTargetData().getABITypeAlignment(
|
|
ObjCTypes.ClassnfABIPtrTy));
|
|
|
|
Entry->setSection("__DATA, __objc_superrefs, regular, no_dead_strip");
|
|
CGM.AddUsedGlobal(Entry);
|
|
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
|
|
/// GetClass - Return a reference to the class for the given interface
|
|
/// decl.
|
|
llvm::Value *CGObjCNonFragileABIMac::GetClass(CGBuilderTy &Builder,
|
|
const ObjCInterfaceDecl *ID) {
|
|
if (ID->isWeakImported()) {
|
|
std::string ClassName(getClassSymbolPrefix() + ID->getNameAsString());
|
|
llvm::GlobalVariable *ClassGV = GetClassGlobal(ClassName);
|
|
ClassGV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage);
|
|
}
|
|
|
|
return EmitClassRef(Builder, ID);
|
|
}
|
|
|
|
/// Generates a message send where the super is the receiver. This is
|
|
/// a message send to self with special delivery semantics indicating
|
|
/// which class's method should be called.
|
|
CodeGen::RValue
|
|
CGObjCNonFragileABIMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector Sel,
|
|
const ObjCInterfaceDecl *Class,
|
|
bool isCategoryImpl,
|
|
llvm::Value *Receiver,
|
|
bool IsClassMessage,
|
|
const CodeGen::CallArgList &CallArgs,
|
|
const ObjCMethodDecl *Method) {
|
|
// ...
|
|
// Create and init a super structure; this is a (receiver, class)
|
|
// pair we will pass to objc_msgSendSuper.
|
|
llvm::Value *ObjCSuper =
|
|
CGF.CreateTempAlloca(ObjCTypes.SuperTy, "objc_super");
|
|
|
|
llvm::Value *ReceiverAsObject =
|
|
CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
|
|
CGF.Builder.CreateStore(ReceiverAsObject,
|
|
CGF.Builder.CreateStructGEP(ObjCSuper, 0));
|
|
|
|
// If this is a class message the metaclass is passed as the target.
|
|
llvm::Value *Target;
|
|
if (IsClassMessage) {
|
|
if (isCategoryImpl) {
|
|
// Message sent to "super' in a class method defined in
|
|
// a category implementation.
|
|
Target = EmitClassRef(CGF.Builder, Class);
|
|
Target = CGF.Builder.CreateStructGEP(Target, 0);
|
|
Target = CGF.Builder.CreateLoad(Target);
|
|
} else
|
|
Target = EmitMetaClassRef(CGF.Builder, Class);
|
|
} else
|
|
Target = EmitSuperClassRef(CGF.Builder, Class);
|
|
|
|
// FIXME: We shouldn't need to do this cast, rectify the ASTContext and
|
|
// ObjCTypes types.
|
|
llvm::Type *ClassTy =
|
|
CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
|
|
Target = CGF.Builder.CreateBitCast(Target, ClassTy);
|
|
CGF.Builder.CreateStore(Target,
|
|
CGF.Builder.CreateStructGEP(ObjCSuper, 1));
|
|
|
|
return (isVTableDispatchedSelector(Sel))
|
|
? EmitVTableMessageSend(CGF, Return, ResultType, Sel,
|
|
ObjCSuper, ObjCTypes.SuperPtrCTy,
|
|
true, CallArgs, Method)
|
|
: EmitMessageSend(CGF, Return, ResultType,
|
|
EmitSelector(CGF.Builder, Sel),
|
|
ObjCSuper, ObjCTypes.SuperPtrCTy,
|
|
true, CallArgs, Method, ObjCTypes);
|
|
}
|
|
|
|
llvm::Value *CGObjCNonFragileABIMac::EmitSelector(CGBuilderTy &Builder,
|
|
Selector Sel, bool lval) {
|
|
llvm::GlobalVariable *&Entry = SelectorReferences[Sel];
|
|
|
|
if (!Entry) {
|
|
llvm::Constant *Casted =
|
|
llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel),
|
|
ObjCTypes.SelectorPtrTy);
|
|
Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.SelectorPtrTy, false,
|
|
llvm::GlobalValue::InternalLinkage,
|
|
Casted, "\01L_OBJC_SELECTOR_REFERENCES_");
|
|
Entry->setSection("__DATA, __objc_selrefs, literal_pointers, no_dead_strip");
|
|
CGM.AddUsedGlobal(Entry);
|
|
}
|
|
|
|
if (lval)
|
|
return Entry;
|
|
return Builder.CreateLoad(Entry);
|
|
}
|
|
/// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
|
|
/// objc_assign_ivar (id src, id *dst, ptrdiff_t)
|
|
///
|
|
void CGObjCNonFragileABIMac::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src,
|
|
llvm::Value *dst,
|
|
llvm::Value *ivarOffset) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall3(ObjCTypes.getGcAssignIvarFn(),
|
|
src, dst, ivarOffset);
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCStrongCastAssign - Code gen for assigning to a __strong cast object.
|
|
/// objc_assign_strongCast (id src, id *dst)
|
|
///
|
|
void CGObjCNonFragileABIMac::EmitObjCStrongCastAssign(
|
|
CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignStrongCastFn(),
|
|
src, dst, "weakassign");
|
|
return;
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::EmitGCMemmoveCollectable(
|
|
CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *DestPtr,
|
|
llvm::Value *SrcPtr,
|
|
llvm::Value *Size) {
|
|
SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, ObjCTypes.Int8PtrTy);
|
|
DestPtr = CGF.Builder.CreateBitCast(DestPtr, ObjCTypes.Int8PtrTy);
|
|
CGF.Builder.CreateCall3(ObjCTypes.GcMemmoveCollectableFn(),
|
|
DestPtr, SrcPtr, Size);
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCWeakRead - Code gen for loading value of a __weak
|
|
/// object: objc_read_weak (id *src)
|
|
///
|
|
llvm::Value * CGObjCNonFragileABIMac::EmitObjCWeakRead(
|
|
CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *AddrWeakObj) {
|
|
llvm::Type* DestTy =
|
|
cast<llvm::PointerType>(AddrWeakObj->getType())->getElementType();
|
|
AddrWeakObj = CGF.Builder.CreateBitCast(AddrWeakObj, ObjCTypes.PtrObjectPtrTy);
|
|
llvm::Value *read_weak = CGF.Builder.CreateCall(ObjCTypes.getGcReadWeakFn(),
|
|
AddrWeakObj, "weakread");
|
|
read_weak = CGF.Builder.CreateBitCast(read_weak, DestTy);
|
|
return read_weak;
|
|
}
|
|
|
|
/// EmitObjCWeakAssign - Code gen for assigning to a __weak object.
|
|
/// objc_assign_weak (id src, id *dst)
|
|
///
|
|
void CGObjCNonFragileABIMac::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignWeakFn(),
|
|
src, dst, "weakassign");
|
|
return;
|
|
}
|
|
|
|
/// EmitObjCGlobalAssign - Code gen for assigning to a __strong object.
|
|
/// objc_assign_global (id src, id *dst)
|
|
///
|
|
void CGObjCNonFragileABIMac::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
|
|
llvm::Value *src, llvm::Value *dst,
|
|
bool threadlocal) {
|
|
llvm::Type * SrcTy = src->getType();
|
|
if (!isa<llvm::PointerType>(SrcTy)) {
|
|
unsigned Size = CGM.getTargetData().getTypeAllocSize(SrcTy);
|
|
assert(Size <= 8 && "does not support size > 8");
|
|
src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
|
|
: CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
|
|
src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
|
|
}
|
|
src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
|
|
dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
|
|
if (!threadlocal)
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignGlobalFn(),
|
|
src, dst, "globalassign");
|
|
else
|
|
CGF.Builder.CreateCall2(ObjCTypes.getGcAssignThreadLocalFn(),
|
|
src, dst, "threadlocalassign");
|
|
return;
|
|
}
|
|
|
|
void
|
|
CGObjCNonFragileABIMac::EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtSynchronizedStmt &S) {
|
|
EmitAtSynchronizedStmt(CGF, S,
|
|
cast<llvm::Function>(ObjCTypes.getSyncEnterFn()),
|
|
cast<llvm::Function>(ObjCTypes.getSyncExitFn()));
|
|
}
|
|
|
|
llvm::Constant *
|
|
CGObjCNonFragileABIMac::GetEHType(QualType T) {
|
|
// There's a particular fixed type info for 'id'.
|
|
if (T->isObjCIdType() ||
|
|
T->isObjCQualifiedIdType()) {
|
|
llvm::Constant *IDEHType =
|
|
CGM.getModule().getGlobalVariable("OBJC_EHTYPE_id");
|
|
if (!IDEHType)
|
|
IDEHType =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy,
|
|
false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0, "OBJC_EHTYPE_id");
|
|
return IDEHType;
|
|
}
|
|
|
|
// All other types should be Objective-C interface pointer types.
|
|
const ObjCObjectPointerType *PT =
|
|
T->getAs<ObjCObjectPointerType>();
|
|
assert(PT && "Invalid @catch type.");
|
|
const ObjCInterfaceType *IT = PT->getInterfaceType();
|
|
assert(IT && "Invalid @catch type.");
|
|
return GetInterfaceEHType(IT->getDecl(), false);
|
|
}
|
|
|
|
void CGObjCNonFragileABIMac::EmitTryStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtTryStmt &S) {
|
|
EmitTryCatchStmt(CGF, S,
|
|
cast<llvm::Function>(ObjCTypes.getObjCBeginCatchFn()),
|
|
cast<llvm::Function>(ObjCTypes.getObjCEndCatchFn()),
|
|
cast<llvm::Function>(ObjCTypes.getExceptionRethrowFn()));
|
|
}
|
|
|
|
/// EmitThrowStmt - Generate code for a throw statement.
|
|
void CGObjCNonFragileABIMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
|
|
const ObjCAtThrowStmt &S) {
|
|
if (const Expr *ThrowExpr = S.getThrowExpr()) {
|
|
llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr);
|
|
Exception = CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy);
|
|
CGF.EmitCallOrInvoke(ObjCTypes.getExceptionThrowFn(), Exception)
|
|
.setDoesNotReturn();
|
|
} else {
|
|
CGF.EmitCallOrInvoke(ObjCTypes.getExceptionRethrowFn())
|
|
.setDoesNotReturn();
|
|
}
|
|
|
|
CGF.Builder.CreateUnreachable();
|
|
CGF.Builder.ClearInsertionPoint();
|
|
}
|
|
|
|
llvm::Constant *
|
|
CGObjCNonFragileABIMac::GetInterfaceEHType(const ObjCInterfaceDecl *ID,
|
|
bool ForDefinition) {
|
|
llvm::GlobalVariable * &Entry = EHTypeReferences[ID->getIdentifier()];
|
|
|
|
// If we don't need a definition, return the entry if found or check
|
|
// if we use an external reference.
|
|
if (!ForDefinition) {
|
|
if (Entry)
|
|
return Entry;
|
|
|
|
// If this type (or a super class) has the __objc_exception__
|
|
// attribute, emit an external reference.
|
|
if (hasObjCExceptionAttribute(CGM.getContext(), ID))
|
|
return Entry =
|
|
new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy, false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0,
|
|
("OBJC_EHTYPE_$_" +
|
|
ID->getIdentifier()->getName()));
|
|
}
|
|
|
|
// Otherwise we need to either make a new entry or fill in the
|
|
// initializer.
|
|
assert((!Entry || !Entry->hasInitializer()) && "Duplicate EHType definition");
|
|
std::string ClassName(getClassSymbolPrefix() + ID->getNameAsString());
|
|
std::string VTableName = "objc_ehtype_vtable";
|
|
llvm::GlobalVariable *VTableGV =
|
|
CGM.getModule().getGlobalVariable(VTableName);
|
|
if (!VTableGV)
|
|
VTableGV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.Int8PtrTy,
|
|
false,
|
|
llvm::GlobalValue::ExternalLinkage,
|
|
0, VTableName);
|
|
|
|
llvm::Value *VTableIdx =
|
|
llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 2);
|
|
|
|
llvm::Constant *Values[] = {
|
|
llvm::ConstantExpr::getGetElementPtr(VTableGV, VTableIdx),
|
|
GetClassName(ID->getIdentifier()),
|
|
GetClassGlobal(ClassName)
|
|
};
|
|
llvm::Constant *Init =
|
|
llvm::ConstantStruct::get(ObjCTypes.EHTypeTy, Values);
|
|
|
|
if (Entry) {
|
|
Entry->setInitializer(Init);
|
|
} else {
|
|
Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy, false,
|
|
llvm::GlobalValue::WeakAnyLinkage,
|
|
Init,
|
|
("OBJC_EHTYPE_$_" +
|
|
ID->getIdentifier()->getName()));
|
|
}
|
|
|
|
if (CGM.getLangOptions().getVisibilityMode() == HiddenVisibility)
|
|
Entry->setVisibility(llvm::GlobalValue::HiddenVisibility);
|
|
Entry->setAlignment(CGM.getTargetData().getABITypeAlignment(
|
|
ObjCTypes.EHTypeTy));
|
|
|
|
if (ForDefinition) {
|
|
Entry->setSection("__DATA,__objc_const");
|
|
Entry->setLinkage(llvm::GlobalValue::ExternalLinkage);
|
|
} else {
|
|
Entry->setSection("__DATA,__datacoal_nt,coalesced");
|
|
}
|
|
|
|
return Entry;
|
|
}
|
|
|
|
/* *** */
|
|
|
|
CodeGen::CGObjCRuntime *
|
|
CodeGen::CreateMacObjCRuntime(CodeGen::CodeGenModule &CGM) {
|
|
if (CGM.getLangOptions().ObjCNonFragileABI)
|
|
return new CGObjCNonFragileABIMac(CGM);
|
|
return new CGObjCMac(CGM);
|
|
}
|