forked from OSchip/llvm-project
1757 lines
67 KiB
C++
1757 lines
67 KiB
C++
//===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===//
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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 coordinates the debug information generation while generating code.
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//
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//===----------------------------------------------------------------------===//
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#include "CGDebugInfo.h"
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#include "CodeGenFunction.h"
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#include "CodeGenModule.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/RecordLayout.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/Version.h"
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#include "clang/CodeGen/CodeGenOptions.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Instructions.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/Module.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/System/Path.h"
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#include "llvm/Target/TargetMachine.h"
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using namespace clang;
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using namespace clang::CodeGen;
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CGDebugInfo::CGDebugInfo(CodeGenModule &CGM)
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: CGM(CGM), isMainCompileUnitCreated(false), DebugFactory(CGM.getModule()),
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BlockLiteralGenericSet(false) {
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}
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CGDebugInfo::~CGDebugInfo() {
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assert(RegionStack.empty() && "Region stack mismatch, stack not empty!");
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}
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void CGDebugInfo::setLocation(SourceLocation Loc) {
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if (Loc.isValid())
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CurLoc = CGM.getContext().getSourceManager().getInstantiationLoc(Loc);
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}
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/// getContextDescriptor - Get context info for the decl.
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llvm::DIDescriptor CGDebugInfo::getContextDescriptor(const Decl *Context,
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llvm::DIDescriptor &CompileUnit) {
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if (!Context)
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return CompileUnit;
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llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator
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I = RegionMap.find(Context);
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if (I != RegionMap.end())
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return llvm::DIDescriptor(dyn_cast_or_null<llvm::MDNode>(I->second));
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// Check namespace.
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if (const NamespaceDecl *NSDecl = dyn_cast<NamespaceDecl>(Context))
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return llvm::DIDescriptor(getOrCreateNameSpace(NSDecl, CompileUnit));
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return CompileUnit;
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}
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/// getFunctionName - Get function name for the given FunctionDecl. If the
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/// name is constructred on demand (e.g. C++ destructor) then the name
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/// is stored on the side.
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llvm::StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
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assert (FD && "Invalid FunctionDecl!");
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IdentifierInfo *FII = FD->getIdentifier();
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if (FII)
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return FII->getName();
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// Otherwise construct human readable name for debug info.
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std::string NS = FD->getNameAsString();
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// Copy this name on the side and use its reference.
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char *StrPtr = DebugInfoNames.Allocate<char>(NS.length());
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memcpy(StrPtr, NS.data(), NS.length());
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return llvm::StringRef(StrPtr, NS.length());
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}
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/// getOrCreateCompileUnit - Get the compile unit from the cache or create a new
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/// one if necessary. This returns null for invalid source locations.
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llvm::DICompileUnit CGDebugInfo::getOrCreateCompileUnit(SourceLocation Loc) {
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// Get source file information.
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const char *FileName = "<unknown>";
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SourceManager &SM = CGM.getContext().getSourceManager();
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if (Loc.isValid()) {
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PresumedLoc PLoc = SM.getPresumedLoc(Loc);
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FileName = PLoc.getFilename();
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unsigned FID = PLoc.getIncludeLoc().getRawEncoding();
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// See if this compile unit has been used before for this valid location.
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llvm::DICompileUnit &Unit = CompileUnitCache[FID];
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if (!Unit.isNull()) return Unit;
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}
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// Get absolute path name.
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llvm::sys::Path AbsFileName(FileName);
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AbsFileName.makeAbsolute();
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// See if thie compile unit is representing main source file. Each source
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// file has corresponding compile unit. There is only one main source
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// file at a time.
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bool isMain = false;
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const LangOptions &LO = CGM.getLangOptions();
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const CodeGenOptions &CGO = CGM.getCodeGenOpts();
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if (isMainCompileUnitCreated == false) {
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if (!CGO.MainFileName.empty()) {
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if (AbsFileName.getLast() == CGO.MainFileName)
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isMain = true;
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} else {
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if (Loc.isValid() && SM.isFromMainFile(Loc))
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isMain = true;
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}
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if (isMain)
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isMainCompileUnitCreated = true;
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}
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unsigned LangTag;
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if (LO.CPlusPlus) {
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if (LO.ObjC1)
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LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
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else
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LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
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} else if (LO.ObjC1) {
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LangTag = llvm::dwarf::DW_LANG_ObjC;
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} else if (LO.C99) {
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LangTag = llvm::dwarf::DW_LANG_C99;
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} else {
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LangTag = llvm::dwarf::DW_LANG_C89;
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}
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const char *Producer =
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#ifdef CLANG_VENDOR
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CLANG_VENDOR
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#endif
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"clang " CLANG_VERSION_STRING;
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// Figure out which version of the ObjC runtime we have.
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unsigned RuntimeVers = 0;
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if (LO.ObjC1)
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RuntimeVers = LO.ObjCNonFragileABI ? 2 : 1;
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// Create new compile unit.
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llvm::DICompileUnit Unit = DebugFactory.CreateCompileUnit(
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LangTag, AbsFileName.getLast(), AbsFileName.getDirname(), Producer, isMain,
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LO.Optimize, CGM.getCodeGenOpts().DwarfDebugFlags, RuntimeVers);
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if (Loc.isValid()) {
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PresumedLoc PLoc = SM.getPresumedLoc(Loc);
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unsigned FID = PLoc.getIncludeLoc().getRawEncoding();
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CompileUnitCache[FID] = Unit;
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}
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return Unit;
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}
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/// CreateType - Get the Basic type from the cache or create a new
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/// one if necessary.
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llvm::DIType CGDebugInfo::CreateType(const BuiltinType *BT,
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llvm::DICompileUnit Unit) {
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unsigned Encoding = 0;
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switch (BT->getKind()) {
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default:
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case BuiltinType::Void:
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return llvm::DIType();
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case BuiltinType::UChar:
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case BuiltinType::Char_U: Encoding = llvm::dwarf::DW_ATE_unsigned_char; break;
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case BuiltinType::Char_S:
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case BuiltinType::SChar: Encoding = llvm::dwarf::DW_ATE_signed_char; break;
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case BuiltinType::UShort:
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case BuiltinType::UInt:
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case BuiltinType::ULong:
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case BuiltinType::ULongLong: Encoding = llvm::dwarf::DW_ATE_unsigned; break;
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case BuiltinType::Short:
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case BuiltinType::Int:
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case BuiltinType::Long:
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case BuiltinType::LongLong: Encoding = llvm::dwarf::DW_ATE_signed; break;
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case BuiltinType::Bool: Encoding = llvm::dwarf::DW_ATE_boolean; break;
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case BuiltinType::Float:
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case BuiltinType::LongDouble:
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case BuiltinType::Double: Encoding = llvm::dwarf::DW_ATE_float; break;
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}
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// Bit size, align and offset of the type.
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uint64_t Size = CGM.getContext().getTypeSize(BT);
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uint64_t Align = CGM.getContext().getTypeAlign(BT);
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uint64_t Offset = 0;
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llvm::DIType DbgTy =
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DebugFactory.CreateBasicType(Unit,
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BT->getName(CGM.getContext().getLangOptions()),
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Unit, 0, Size, Align,
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Offset, /*flags*/ 0, Encoding);
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return DbgTy;
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}
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llvm::DIType CGDebugInfo::CreateType(const ComplexType *Ty,
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llvm::DICompileUnit Unit) {
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// Bit size, align and offset of the type.
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unsigned Encoding = llvm::dwarf::DW_ATE_complex_float;
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if (Ty->isComplexIntegerType())
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Encoding = llvm::dwarf::DW_ATE_lo_user;
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uint64_t Size = CGM.getContext().getTypeSize(Ty);
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uint64_t Align = CGM.getContext().getTypeAlign(Ty);
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uint64_t Offset = 0;
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llvm::DIType DbgTy =
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DebugFactory.CreateBasicType(Unit, "complex",
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Unit, 0, Size, Align,
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Offset, /*flags*/ 0, Encoding);
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return DbgTy;
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}
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/// CreateCVRType - Get the qualified type from the cache or create
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/// a new one if necessary.
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llvm::DIType CGDebugInfo::CreateQualifiedType(QualType Ty, llvm::DICompileUnit Unit) {
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QualifierCollector Qc;
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const Type *T = Qc.strip(Ty);
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// Ignore these qualifiers for now.
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Qc.removeObjCGCAttr();
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Qc.removeAddressSpace();
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// We will create one Derived type for one qualifier and recurse to handle any
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// additional ones.
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unsigned Tag;
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if (Qc.hasConst()) {
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Tag = llvm::dwarf::DW_TAG_const_type;
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Qc.removeConst();
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} else if (Qc.hasVolatile()) {
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Tag = llvm::dwarf::DW_TAG_volatile_type;
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Qc.removeVolatile();
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} else if (Qc.hasRestrict()) {
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Tag = llvm::dwarf::DW_TAG_restrict_type;
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Qc.removeRestrict();
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} else {
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assert(Qc.empty() && "Unknown type qualifier for debug info");
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return getOrCreateType(QualType(T, 0), Unit);
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}
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llvm::DIType FromTy = getOrCreateType(Qc.apply(T), Unit);
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// No need to fill in the Name, Line, Size, Alignment, Offset in case of
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// CVR derived types.
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llvm::DIType DbgTy =
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DebugFactory.CreateDerivedType(Tag, Unit, "", llvm::DICompileUnit(),
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0, 0, 0, 0, 0, FromTy);
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return DbgTy;
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}
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llvm::DIType CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
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llvm::DICompileUnit Unit) {
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llvm::DIType DbgTy =
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CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
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Ty->getPointeeType(), Unit);
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return DbgTy;
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}
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llvm::DIType CGDebugInfo::CreateType(const PointerType *Ty,
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llvm::DICompileUnit Unit) {
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return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty,
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Ty->getPointeeType(), Unit);
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}
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llvm::DIType CGDebugInfo::CreatePointerLikeType(unsigned Tag,
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const Type *Ty,
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QualType PointeeTy,
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llvm::DICompileUnit Unit) {
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llvm::DIType EltTy = getOrCreateType(PointeeTy, Unit);
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// Bit size, align and offset of the type.
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// Size is always the size of a pointer. We can't use getTypeSize here
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// because that does not return the correct value for references.
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uint64_t Size =
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CGM.getContext().Target.getPointerWidth(PointeeTy.getAddressSpace());
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uint64_t Align = CGM.getContext().getTypeAlign(Ty);
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return
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DebugFactory.CreateDerivedType(Tag, Unit, "", llvm::DICompileUnit(),
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0, Size, Align, 0, 0, EltTy);
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}
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llvm::DIType CGDebugInfo::CreateType(const BlockPointerType *Ty,
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llvm::DICompileUnit Unit) {
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if (BlockLiteralGenericSet)
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return BlockLiteralGeneric;
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llvm::DICompileUnit DefUnit;
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unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
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llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
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llvm::DIType FieldTy;
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QualType FType;
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uint64_t FieldSize, FieldOffset;
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unsigned FieldAlign;
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llvm::DIArray Elements;
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llvm::DIType EltTy, DescTy;
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FieldOffset = 0;
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FType = CGM.getContext().UnsignedLongTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"reserved", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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FType = CGM.getContext().UnsignedLongTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"Size", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
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EltTys.clear();
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unsigned Flags = llvm::DIType::FlagAppleBlock;
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EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_descriptor",
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DefUnit, 0, FieldOffset, 0, 0, Flags,
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llvm::DIType(), Elements);
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// Bit size, align and offset of the type.
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uint64_t Size = CGM.getContext().getTypeSize(Ty);
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uint64_t Align = CGM.getContext().getTypeAlign(Ty);
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DescTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
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Unit, "", llvm::DICompileUnit(),
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0, Size, Align, 0, 0, EltTy);
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FieldOffset = 0;
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FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"__isa", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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FType = CGM.getContext().IntTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"__flags", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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FType = CGM.getContext().IntTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"__reserved", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = CGM.getContext().getTypeSize(FType);
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FieldAlign = CGM.getContext().getTypeAlign(FType);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"__FuncPtr", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
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FieldTy = DescTy;
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FieldSize = CGM.getContext().getTypeSize(Ty);
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FieldAlign = CGM.getContext().getTypeAlign(Ty);
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FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"__descriptor", DefUnit,
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0, FieldSize, FieldAlign,
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FieldOffset, 0, FieldTy);
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EltTys.push_back(FieldTy);
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FieldOffset += FieldSize;
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Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
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EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_literal_generic",
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DefUnit, 0, FieldOffset, 0, 0, Flags,
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llvm::DIType(), Elements);
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BlockLiteralGenericSet = true;
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BlockLiteralGeneric
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= DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type, Unit,
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"", llvm::DICompileUnit(),
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0, Size, Align, 0, 0, EltTy);
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return BlockLiteralGeneric;
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}
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llvm::DIType CGDebugInfo::CreateType(const TypedefType *Ty,
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llvm::DICompileUnit Unit) {
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// Typedefs are derived from some other type. If we have a typedef of a
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// typedef, make sure to emit the whole chain.
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llvm::DIType Src = getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit);
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// We don't set size information, but do specify where the typedef was
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// declared.
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SourceManager &SM = CGM.getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Ty->getDecl()->getLocation());
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unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
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llvm::DIDescriptor TyContext
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= getContextDescriptor(dyn_cast<Decl>(Ty->getDecl()->getDeclContext()),
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Unit);
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llvm::DIType DbgTy =
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DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_typedef,
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TyContext,
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Ty->getDecl()->getName(), Unit,
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Line, 0, 0, 0, 0, Src);
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return DbgTy;
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}
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llvm::DIType CGDebugInfo::CreateType(const FunctionType *Ty,
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llvm::DICompileUnit Unit) {
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llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
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// Add the result type at least.
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EltTys.push_back(getOrCreateType(Ty->getResultType(), Unit));
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// Set up remainder of arguments if there is a prototype.
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// FIXME: IF NOT, HOW IS THIS REPRESENTED? llvm-gcc doesn't represent '...'!
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if (const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Ty)) {
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for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i)
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EltTys.push_back(getOrCreateType(FTP->getArgType(i), Unit));
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} else {
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// FIXME: Handle () case in C. llvm-gcc doesn't do it either.
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}
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llvm::DIArray EltTypeArray =
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DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
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|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, 0, 0, 0, 0,
|
|
llvm::DIType(), EltTypeArray);
|
|
return DbgTy;
|
|
}
|
|
|
|
/// CollectRecordFields - A helper function to collect debug info for
|
|
/// record fields. This is used while creating debug info entry for a Record.
|
|
void CGDebugInfo::
|
|
CollectRecordFields(const RecordDecl *RD, llvm::DICompileUnit Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys) {
|
|
unsigned FieldNo = 0;
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
|
|
for (RecordDecl::field_iterator I = RD->field_begin(),
|
|
E = RD->field_end();
|
|
I != E; ++I, ++FieldNo) {
|
|
FieldDecl *Field = *I;
|
|
llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
|
|
|
|
llvm::StringRef FieldName = Field->getName();
|
|
|
|
// Ignore unnamed fields. Do not ignore unnamed records.
|
|
if (FieldName.empty() && !isa<RecordType>(Field->getType()))
|
|
continue;
|
|
|
|
// Get the location for the field.
|
|
SourceLocation FieldDefLoc = Field->getLocation();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(FieldDefLoc);
|
|
llvm::DICompileUnit FieldDefUnit;
|
|
unsigned FieldLine = 0;
|
|
|
|
if (!PLoc.isInvalid()) {
|
|
FieldDefUnit = getOrCreateCompileUnit(FieldDefLoc);
|
|
FieldLine = PLoc.getLine();
|
|
}
|
|
|
|
QualType FType = Field->getType();
|
|
uint64_t FieldSize = 0;
|
|
unsigned FieldAlign = 0;
|
|
if (!FType->isIncompleteArrayType()) {
|
|
|
|
// Bit size, align and offset of the type.
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
Expr *BitWidth = Field->getBitWidth();
|
|
if (BitWidth)
|
|
FieldSize = BitWidth->EvaluateAsInt(CGM.getContext()).getZExtValue();
|
|
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
}
|
|
|
|
uint64_t FieldOffset = RL.getFieldOffset(FieldNo);
|
|
|
|
// Create a DW_TAG_member node to remember the offset of this field in the
|
|
// struct. FIXME: This is an absolutely insane way to capture this
|
|
// information. When we gut debug info, this should be fixed.
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
FieldName, FieldDefUnit,
|
|
FieldLine, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
}
|
|
}
|
|
|
|
/// getOrCreateMethodType - CXXMethodDecl's type is a FunctionType. This
|
|
/// function type is not updated to include implicit "this" pointer. Use this
|
|
/// routine to get a method type which includes "this" pointer.
|
|
llvm::DIType
|
|
CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
|
|
llvm::DICompileUnit Unit) {
|
|
llvm::DIType FnTy = getOrCreateType(Method->getType(), Unit);
|
|
|
|
// Static methods do not need "this" pointer argument.
|
|
if (Method->isStatic())
|
|
return FnTy;
|
|
|
|
// Add "this" pointer.
|
|
|
|
llvm::DIArray Args = llvm::DICompositeType(FnTy.getNode()).getTypeArray();
|
|
assert (Args.getNumElements() && "Invalid number of arguments!");
|
|
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> Elts;
|
|
|
|
// First element is always return type. For 'void' functions it is NULL.
|
|
Elts.push_back(Args.getElement(0));
|
|
|
|
// "this" pointer is always first argument.
|
|
ASTContext &Context = CGM.getContext();
|
|
QualType ThisPtr =
|
|
Context.getPointerType(Context.getTagDeclType(Method->getParent()));
|
|
llvm::DIType ThisPtrType =
|
|
DebugFactory.CreateArtificialType(getOrCreateType(ThisPtr, Unit));
|
|
TypeCache[ThisPtr.getAsOpaquePtr()] = ThisPtrType.getNode();
|
|
Elts.push_back(ThisPtrType);
|
|
|
|
// Copy rest of the arguments.
|
|
for (unsigned i = 1, e = Args.getNumElements(); i != e; ++i)
|
|
Elts.push_back(Args.getElement(i));
|
|
|
|
llvm::DIArray EltTypeArray =
|
|
DebugFactory.GetOrCreateArray(Elts.data(), Elts.size());
|
|
|
|
return
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, 0, 0, 0, 0,
|
|
llvm::DIType(), EltTypeArray);
|
|
}
|
|
|
|
/// CreateCXXMemberFunction - A helper function to create a DISubprogram for
|
|
/// a single member function GlobalDecl.
|
|
llvm::DISubprogram
|
|
CGDebugInfo::CreateCXXMemberFunction(const CXXMethodDecl *Method,
|
|
llvm::DICompileUnit Unit,
|
|
llvm::DICompositeType &RecordTy) {
|
|
bool IsCtorOrDtor =
|
|
isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
|
|
|
|
llvm::StringRef MethodName = getFunctionName(Method);
|
|
llvm::StringRef MethodLinkageName;
|
|
llvm::DIType MethodTy = getOrCreateMethodType(Method, Unit);
|
|
|
|
// Since a single ctor/dtor corresponds to multiple functions, it doesn't
|
|
// make sense to give a single ctor/dtor a linkage name.
|
|
if (!IsCtorOrDtor)
|
|
MethodLinkageName = CGM.getMangledName(Method);
|
|
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
|
|
// Get the location for the method.
|
|
SourceLocation MethodDefLoc = Method->getLocation();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(MethodDefLoc);
|
|
llvm::DICompileUnit MethodDefUnit;
|
|
unsigned MethodLine = 0;
|
|
|
|
if (!PLoc.isInvalid()) {
|
|
MethodDefUnit = getOrCreateCompileUnit(MethodDefLoc);
|
|
MethodLine = PLoc.getLine();
|
|
}
|
|
|
|
// Collect virtual method info.
|
|
llvm::DIType ContainingType;
|
|
unsigned Virtuality = 0;
|
|
unsigned VIndex = 0;
|
|
|
|
if (Method->isVirtual()) {
|
|
if (Method->isPure())
|
|
Virtuality = llvm::dwarf::DW_VIRTUALITY_pure_virtual;
|
|
else
|
|
Virtuality = llvm::dwarf::DW_VIRTUALITY_virtual;
|
|
|
|
// It doesn't make sense to give a virtual destructor a vtable index,
|
|
// since a single destructor has two entries in the vtable.
|
|
if (!isa<CXXDestructorDecl>(Method))
|
|
VIndex = CGM.getVtableInfo().getMethodVtableIndex(Method);
|
|
ContainingType = RecordTy;
|
|
}
|
|
|
|
llvm::DISubprogram SP =
|
|
DebugFactory.CreateSubprogram(RecordTy , MethodName, MethodName,
|
|
MethodLinkageName,
|
|
MethodDefUnit, MethodLine,
|
|
MethodTy, /*isLocalToUnit=*/false,
|
|
Method->isThisDeclarationADefinition(),
|
|
Virtuality, VIndex, ContainingType);
|
|
|
|
// Don't cache ctors or dtors since we have to emit multiple functions for
|
|
// a single ctor or dtor.
|
|
if (!IsCtorOrDtor && Method->isThisDeclarationADefinition())
|
|
SPCache[Method] = llvm::WeakVH(SP.getNode());
|
|
|
|
return SP;
|
|
}
|
|
|
|
/// CollectCXXMemberFunctions - A helper function to collect debug info for
|
|
/// C++ member functions.This is used while creating debug info entry for
|
|
/// a Record.
|
|
void CGDebugInfo::
|
|
CollectCXXMemberFunctions(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
|
|
llvm::DICompositeType &RecordTy) {
|
|
for(CXXRecordDecl::method_iterator I = RD->method_begin(),
|
|
E = RD->method_end(); I != E; ++I) {
|
|
const CXXMethodDecl *Method = *I;
|
|
|
|
if (Method->isImplicit() && !Method->isUsed())
|
|
continue;
|
|
|
|
EltTys.push_back(CreateCXXMemberFunction(Method, Unit, RecordTy));
|
|
}
|
|
}
|
|
|
|
/// CollectCXXBases - A helper function to collect debug info for
|
|
/// C++ base classes. This is used while creating debug info entry for
|
|
/// a Record.
|
|
void CGDebugInfo::
|
|
CollectCXXBases(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
|
|
llvm::DICompositeType &RecordTy) {
|
|
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
|
|
for (CXXRecordDecl::base_class_const_iterator BI = RD->bases_begin(),
|
|
BE = RD->bases_end(); BI != BE; ++BI) {
|
|
unsigned BFlags = 0;
|
|
uint64_t BaseOffset;
|
|
|
|
const CXXRecordDecl *Base =
|
|
cast<CXXRecordDecl>(BI->getType()->getAs<RecordType>()->getDecl());
|
|
|
|
if (BI->isVirtual()) {
|
|
// virtual base offset index is -ve. The code generator emits dwarf
|
|
// expression where it expects +ve number.
|
|
BaseOffset = 0 - CGM.getVtableInfo().getVirtualBaseOffsetIndex(RD, Base);
|
|
BFlags = llvm::DIType::FlagVirtual;
|
|
} else
|
|
BaseOffset = RL.getBaseClassOffset(Base);
|
|
|
|
AccessSpecifier Access = BI->getAccessSpecifier();
|
|
if (Access == clang::AS_private)
|
|
BFlags |= llvm::DIType::FlagPrivate;
|
|
else if (Access == clang::AS_protected)
|
|
BFlags |= llvm::DIType::FlagProtected;
|
|
|
|
llvm::DIType DTy =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_inheritance,
|
|
RecordTy, llvm::StringRef(),
|
|
llvm::DICompileUnit(), 0, 0, 0,
|
|
BaseOffset, BFlags,
|
|
getOrCreateType(BI->getType(),
|
|
Unit));
|
|
EltTys.push_back(DTy);
|
|
}
|
|
}
|
|
|
|
/// getOrCreateVTablePtrType - Return debug info descriptor for vtable.
|
|
llvm::DIType CGDebugInfo::getOrCreateVTablePtrType(llvm::DICompileUnit Unit) {
|
|
if (!VTablePtrType.isNull())
|
|
return VTablePtrType;
|
|
|
|
ASTContext &Context = CGM.getContext();
|
|
|
|
/* Function type */
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> STys;
|
|
STys.push_back(getOrCreateType(Context.IntTy, Unit));
|
|
llvm::DIArray SElements =
|
|
DebugFactory.GetOrCreateArray(STys.data(), STys.size());
|
|
llvm::DIType SubTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, 0, 0, 0, 0, llvm::DIType(), SElements);
|
|
|
|
unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
|
|
llvm::DIType vtbl_ptr_type
|
|
= DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
|
|
Unit, "__vtbl_ptr_type", llvm::DICompileUnit(),
|
|
0, Size, 0, 0, 0, SubTy);
|
|
|
|
VTablePtrType = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, Size, 0, 0, 0, vtbl_ptr_type);
|
|
return VTablePtrType;
|
|
}
|
|
|
|
/// getVtableName - Get vtable name for the given Class.
|
|
llvm::StringRef CGDebugInfo::getVtableName(const CXXRecordDecl *RD) {
|
|
// Otherwise construct gdb compatible name name.
|
|
std::string Name = "_vptr$" + RD->getNameAsString();
|
|
|
|
// Copy this name on the side and use its reference.
|
|
char *StrPtr = DebugInfoNames.Allocate<char>(Name.length());
|
|
memcpy(StrPtr, Name.data(), Name.length());
|
|
return llvm::StringRef(StrPtr, Name.length());
|
|
}
|
|
|
|
|
|
/// CollectVtableInfo - If the C++ class has vtable info then insert appropriate
|
|
/// debug info entry in EltTys vector.
|
|
void CGDebugInfo::
|
|
CollectVtableInfo(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys) {
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
|
|
|
|
// If there is a primary base then it will hold vtable info.
|
|
if (RL.getPrimaryBase())
|
|
return;
|
|
|
|
// If this class is not dynamic then there is not any vtable info to collect.
|
|
if (!RD->isDynamicClass())
|
|
return;
|
|
|
|
unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
|
|
llvm::DIType VPTR
|
|
= DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
getVtableName(RD), llvm::DICompileUnit(),
|
|
0, Size, 0, 0, 0,
|
|
getOrCreateVTablePtrType(Unit));
|
|
EltTys.push_back(VPTR);
|
|
}
|
|
|
|
/// CreateType - get structure or union type.
|
|
llvm::DIType CGDebugInfo::CreateType(const RecordType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
RecordDecl *RD = Ty->getDecl();
|
|
|
|
unsigned Tag;
|
|
if (RD->isStruct())
|
|
Tag = llvm::dwarf::DW_TAG_structure_type;
|
|
else if (RD->isUnion())
|
|
Tag = llvm::dwarf::DW_TAG_union_type;
|
|
else {
|
|
assert(RD->isClass() && "Unknown RecordType!");
|
|
Tag = llvm::dwarf::DW_TAG_class_type;
|
|
}
|
|
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
|
|
// Get overall information about the record type for the debug info.
|
|
PresumedLoc PLoc = SM.getPresumedLoc(RD->getLocation());
|
|
llvm::DICompileUnit DefUnit;
|
|
unsigned Line = 0;
|
|
if (!PLoc.isInvalid()) {
|
|
DefUnit = getOrCreateCompileUnit(RD->getLocation());
|
|
Line = PLoc.getLine();
|
|
}
|
|
|
|
// Records and classes and unions can all be recursive. To handle them, we
|
|
// first generate a debug descriptor for the struct as a forward declaration.
|
|
// Then (if it is a definition) we go through and get debug info for all of
|
|
// its members. Finally, we create a descriptor for the complete type (which
|
|
// may refer to the forward decl if the struct is recursive) and replace all
|
|
// uses of the forward declaration with the final definition.
|
|
|
|
// A RD->getName() is not unique. However, the debug info descriptors
|
|
// are uniqued so use type name to ensure uniquness.
|
|
std::string STy = QualType(Ty, 0).getAsString();
|
|
llvm::DIDescriptor FDContext =
|
|
getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
|
|
llvm::DICompositeType FwdDecl =
|
|
DebugFactory.CreateCompositeType(Tag, FDContext,
|
|
STy.c_str(),
|
|
DefUnit, Line, 0, 0, 0, 0,
|
|
llvm::DIType(), llvm::DIArray());
|
|
|
|
// If this is just a forward declaration, return it.
|
|
if (!RD->getDefinition())
|
|
return FwdDecl;
|
|
|
|
llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
|
|
// Otherwise, insert it into the TypeCache so that recursive uses will find
|
|
// it.
|
|
TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl.getNode();
|
|
|
|
// Convert all the elements.
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
|
|
|
|
const CXXRecordDecl *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
|
|
if (CXXDecl) {
|
|
CollectCXXBases(CXXDecl, Unit, EltTys, FwdDecl);
|
|
CollectVtableInfo(CXXDecl, Unit, EltTys);
|
|
}
|
|
CollectRecordFields(RD, Unit, EltTys);
|
|
llvm::MDNode *ContainingType = NULL;
|
|
if (CXXDecl) {
|
|
CollectCXXMemberFunctions(CXXDecl, Unit, EltTys, FwdDecl);
|
|
|
|
// A class's primary base or the class itself contains the vtable.
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
|
|
if (const CXXRecordDecl *PBase = RL.getPrimaryBase())
|
|
ContainingType =
|
|
getOrCreateType(QualType(PBase->getTypeForDecl(), 0), Unit).getNode();
|
|
else if (CXXDecl->isDynamicClass())
|
|
ContainingType = FwdDecl.getNode();
|
|
}
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
// Bit size, align and offset of the type.
|
|
uint64_t Size = CGM.getContext().getTypeSize(Ty);
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
llvm::DIDescriptor RDContext =
|
|
getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
|
|
llvm::DICompositeType RealDecl =
|
|
DebugFactory.CreateCompositeType(Tag, RDContext,
|
|
RD->getName(),
|
|
DefUnit, Line, Size, Align, 0, 0,
|
|
llvm::DIType(), Elements,
|
|
0, ContainingType);
|
|
|
|
// Now that we have a real decl for the struct, replace anything using the
|
|
// old decl with the new one. This will recursively update the debug info.
|
|
llvm::DIDerivedType(FwdDeclNode).replaceAllUsesWith(RealDecl);
|
|
|
|
return RealDecl;
|
|
}
|
|
|
|
/// CreateType - get objective-c interface type.
|
|
llvm::DIType CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
ObjCInterfaceDecl *ID = Ty->getDecl();
|
|
|
|
unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
|
|
// Get overall information about the record type for the debug info.
|
|
llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(ID->getLocation());
|
|
PresumedLoc PLoc = SM.getPresumedLoc(ID->getLocation());
|
|
unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
|
|
unsigned RuntimeLang = DefUnit.getLanguage();
|
|
|
|
// To handle recursive interface, we
|
|
// first generate a debug descriptor for the struct as a forward declaration.
|
|
// Then (if it is a definition) we go through and get debug info for all of
|
|
// its members. Finally, we create a descriptor for the complete type (which
|
|
// may refer to the forward decl if the struct is recursive) and replace all
|
|
// uses of the forward declaration with the final definition.
|
|
llvm::DICompositeType FwdDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, ID->getName(),
|
|
DefUnit, Line, 0, 0, 0, 0,
|
|
llvm::DIType(), llvm::DIArray(),
|
|
RuntimeLang);
|
|
|
|
// If this is just a forward declaration, return it.
|
|
if (ID->isForwardDecl())
|
|
return FwdDecl;
|
|
|
|
llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
|
|
// Otherwise, insert it into the TypeCache so that recursive uses will find
|
|
// it.
|
|
TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl.getNode();
|
|
|
|
// Convert all the elements.
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
|
|
|
|
ObjCInterfaceDecl *SClass = ID->getSuperClass();
|
|
if (SClass) {
|
|
llvm::DIType SClassTy =
|
|
getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
|
|
llvm::DIType InhTag =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_inheritance,
|
|
Unit, "", llvm::DICompileUnit(), 0, 0, 0,
|
|
0 /* offset */, 0, SClassTy);
|
|
EltTys.push_back(InhTag);
|
|
}
|
|
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
|
|
|
|
unsigned FieldNo = 0;
|
|
for (ObjCInterfaceDecl::ivar_iterator I = ID->ivar_begin(),
|
|
E = ID->ivar_end(); I != E; ++I, ++FieldNo) {
|
|
ObjCIvarDecl *Field = *I;
|
|
llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
|
|
|
|
llvm::StringRef FieldName = Field->getName();
|
|
|
|
// Ignore unnamed fields.
|
|
if (FieldName.empty())
|
|
continue;
|
|
|
|
// Get the location for the field.
|
|
SourceLocation FieldDefLoc = Field->getLocation();
|
|
llvm::DICompileUnit FieldDefUnit = getOrCreateCompileUnit(FieldDefLoc);
|
|
PresumedLoc PLoc = SM.getPresumedLoc(FieldDefLoc);
|
|
unsigned FieldLine = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
|
|
QualType FType = Field->getType();
|
|
uint64_t FieldSize = 0;
|
|
unsigned FieldAlign = 0;
|
|
|
|
if (!FType->isIncompleteArrayType()) {
|
|
|
|
// Bit size, align and offset of the type.
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
Expr *BitWidth = Field->getBitWidth();
|
|
if (BitWidth)
|
|
FieldSize = BitWidth->EvaluateAsInt(CGM.getContext()).getZExtValue();
|
|
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
}
|
|
|
|
uint64_t FieldOffset = RL.getFieldOffset(FieldNo);
|
|
|
|
unsigned Flags = 0;
|
|
if (Field->getAccessControl() == ObjCIvarDecl::Protected)
|
|
Flags = llvm::DIType::FlagProtected;
|
|
else if (Field->getAccessControl() == ObjCIvarDecl::Private)
|
|
Flags = llvm::DIType::FlagPrivate;
|
|
|
|
// Create a DW_TAG_member node to remember the offset of this field in the
|
|
// struct. FIXME: This is an absolutely insane way to capture this
|
|
// information. When we gut debug info, this should be fixed.
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
FieldName, FieldDefUnit,
|
|
FieldLine, FieldSize, FieldAlign,
|
|
FieldOffset, Flags, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
}
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
// Bit size, align and offset of the type.
|
|
uint64_t Size = CGM.getContext().getTypeSize(Ty);
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
llvm::DICompositeType RealDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, ID->getName(), DefUnit,
|
|
Line, Size, Align, 0, 0, llvm::DIType(),
|
|
Elements, RuntimeLang);
|
|
|
|
// Now that we have a real decl for the struct, replace anything using the
|
|
// old decl with the new one. This will recursively update the debug info.
|
|
llvm::DIDerivedType(FwdDeclNode).replaceAllUsesWith(RealDecl);
|
|
|
|
return RealDecl;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const EnumType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
EnumDecl *ED = Ty->getDecl();
|
|
|
|
llvm::SmallVector<llvm::DIDescriptor, 32> Enumerators;
|
|
|
|
// Create DIEnumerator elements for each enumerator.
|
|
for (EnumDecl::enumerator_iterator
|
|
Enum = ED->enumerator_begin(), EnumEnd = ED->enumerator_end();
|
|
Enum != EnumEnd; ++Enum) {
|
|
Enumerators.push_back(DebugFactory.CreateEnumerator(Enum->getName(),
|
|
Enum->getInitVal().getZExtValue()));
|
|
}
|
|
|
|
// Return a CompositeType for the enum itself.
|
|
llvm::DIArray EltArray =
|
|
DebugFactory.GetOrCreateArray(Enumerators.data(), Enumerators.size());
|
|
|
|
SourceLocation DefLoc = ED->getLocation();
|
|
llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(DefLoc);
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(DefLoc);
|
|
unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
|
|
// Size and align of the type.
|
|
uint64_t Size = 0;
|
|
unsigned Align = 0;
|
|
if (!Ty->isIncompleteType()) {
|
|
Size = CGM.getContext().getTypeSize(Ty);
|
|
Align = CGM.getContext().getTypeAlign(Ty);
|
|
}
|
|
|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_enumeration_type,
|
|
Unit, ED->getName(), DefUnit, Line,
|
|
Size, Align, 0, 0,
|
|
llvm::DIType(), EltArray);
|
|
return DbgTy;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const TagType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
if (const RecordType *RT = dyn_cast<RecordType>(Ty))
|
|
return CreateType(RT, Unit);
|
|
else if (const EnumType *ET = dyn_cast<EnumType>(Ty))
|
|
return CreateType(ET, Unit);
|
|
|
|
return llvm::DIType();
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const VectorType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
llvm::DIType ElementTy = getOrCreateType(Ty->getElementType(), Unit);
|
|
uint64_t NumElems = Ty->getNumElements();
|
|
if (NumElems > 0)
|
|
--NumElems;
|
|
llvm::SmallVector<llvm::DIDescriptor, 8> Subscripts;
|
|
Subscripts.push_back(DebugFactory.GetOrCreateSubrange(0, NumElems));
|
|
|
|
llvm::DIArray SubscriptArray =
|
|
DebugFactory.GetOrCreateArray(Subscripts.data(), Subscripts.size());
|
|
|
|
uint64_t Size = CGM.getContext().getTypeSize(Ty);
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
return
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_vector_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, Size, Align, 0, 0,
|
|
ElementTy, SubscriptArray);
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const ArrayType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
uint64_t Size;
|
|
uint64_t Align;
|
|
|
|
|
|
// FIXME: make getTypeAlign() aware of VLAs and incomplete array types
|
|
if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(Ty)) {
|
|
Size = 0;
|
|
Align =
|
|
CGM.getContext().getTypeAlign(CGM.getContext().getBaseElementType(VAT));
|
|
} else if (Ty->isIncompleteArrayType()) {
|
|
Size = 0;
|
|
Align = CGM.getContext().getTypeAlign(Ty->getElementType());
|
|
} else {
|
|
// Size and align of the whole array, not the element type.
|
|
Size = CGM.getContext().getTypeSize(Ty);
|
|
Align = CGM.getContext().getTypeAlign(Ty);
|
|
}
|
|
|
|
// Add the dimensions of the array. FIXME: This loses CV qualifiers from
|
|
// interior arrays, do we care? Why aren't nested arrays represented the
|
|
// obvious/recursive way?
|
|
llvm::SmallVector<llvm::DIDescriptor, 8> Subscripts;
|
|
QualType EltTy(Ty, 0);
|
|
while ((Ty = dyn_cast<ArrayType>(EltTy))) {
|
|
uint64_t Upper = 0;
|
|
if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
|
|
if (CAT->getSize().getZExtValue())
|
|
Upper = CAT->getSize().getZExtValue() - 1;
|
|
// FIXME: Verify this is right for VLAs.
|
|
Subscripts.push_back(DebugFactory.GetOrCreateSubrange(0, Upper));
|
|
EltTy = Ty->getElementType();
|
|
}
|
|
|
|
llvm::DIArray SubscriptArray =
|
|
DebugFactory.GetOrCreateArray(Subscripts.data(), Subscripts.size());
|
|
|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_array_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, Size, Align, 0, 0,
|
|
getOrCreateType(EltTy, Unit),
|
|
SubscriptArray);
|
|
return DbgTy;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const LValueReferenceType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type,
|
|
Ty, Ty->getPointeeType(), Unit);
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const MemberPointerType *Ty,
|
|
llvm::DICompileUnit U) {
|
|
QualType PointerDiffTy = CGM.getContext().getPointerDiffType();
|
|
llvm::DIType PointerDiffDITy = getOrCreateType(PointerDiffTy, U);
|
|
|
|
if (!Ty->getPointeeType()->isFunctionType()) {
|
|
// We have a data member pointer type.
|
|
return PointerDiffDITy;
|
|
}
|
|
|
|
// We have a member function pointer type. Treat it as a struct with two
|
|
// ptrdiff_t members.
|
|
std::pair<uint64_t, unsigned> Info = CGM.getContext().getTypeInfo(Ty);
|
|
|
|
uint64_t FieldOffset = 0;
|
|
llvm::DIDescriptor ElementTypes[2];
|
|
|
|
// FIXME: This should probably be a function type instead.
|
|
ElementTypes[0] =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, U,
|
|
"ptr", llvm::DICompileUnit(), 0,
|
|
Info.first, Info.second, FieldOffset, 0,
|
|
PointerDiffDITy);
|
|
FieldOffset += Info.first;
|
|
|
|
ElementTypes[1] =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, U,
|
|
"ptr", llvm::DICompileUnit(), 0,
|
|
Info.first, Info.second, FieldOffset, 0,
|
|
PointerDiffDITy);
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(&ElementTypes[0],
|
|
llvm::array_lengthof(ElementTypes));
|
|
|
|
return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
|
|
U, llvm::StringRef("test"),
|
|
llvm::DICompileUnit(), 0, FieldOffset,
|
|
0, 0, 0, llvm::DIType(), Elements);
|
|
}
|
|
|
|
static QualType UnwrapTypeForDebugInfo(QualType T) {
|
|
do {
|
|
QualType LastT = T;
|
|
switch (T->getTypeClass()) {
|
|
default:
|
|
return T;
|
|
case Type::TemplateSpecialization:
|
|
T = cast<TemplateSpecializationType>(T)->desugar();
|
|
break;
|
|
case Type::TypeOfExpr: {
|
|
TypeOfExprType *Ty = cast<TypeOfExprType>(T);
|
|
T = Ty->getUnderlyingExpr()->getType();
|
|
break;
|
|
}
|
|
case Type::TypeOf:
|
|
T = cast<TypeOfType>(T)->getUnderlyingType();
|
|
break;
|
|
case Type::Decltype:
|
|
T = cast<DecltypeType>(T)->getUnderlyingType();
|
|
break;
|
|
case Type::QualifiedName:
|
|
T = cast<QualifiedNameType>(T)->getNamedType();
|
|
break;
|
|
case Type::SubstTemplateTypeParm:
|
|
T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
|
|
break;
|
|
case Type::Elaborated:
|
|
T = cast<ElaboratedType>(T)->getUnderlyingType();
|
|
break;
|
|
}
|
|
|
|
assert(T != LastT && "Type unwrapping failed to unwrap!");
|
|
if (T == LastT)
|
|
return T;
|
|
} while (true);
|
|
|
|
return T;
|
|
}
|
|
|
|
/// getOrCreateType - Get the type from the cache or create a new
|
|
/// one if necessary.
|
|
llvm::DIType CGDebugInfo::getOrCreateType(QualType Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
if (Ty.isNull())
|
|
return llvm::DIType();
|
|
|
|
// Unwrap the type as needed for debug information.
|
|
Ty = UnwrapTypeForDebugInfo(Ty);
|
|
|
|
// Check for existing entry.
|
|
std::map<void *, llvm::WeakVH>::iterator it =
|
|
TypeCache.find(Ty.getAsOpaquePtr());
|
|
if (it != TypeCache.end()) {
|
|
// Verify that the debug info still exists.
|
|
if (&*it->second)
|
|
return llvm::DIType(cast<llvm::MDNode>(it->second));
|
|
}
|
|
|
|
// Otherwise create the type.
|
|
llvm::DIType Res = CreateTypeNode(Ty, Unit);
|
|
|
|
// And update the type cache.
|
|
TypeCache[Ty.getAsOpaquePtr()] = Res.getNode();
|
|
return Res;
|
|
}
|
|
|
|
/// CreateTypeNode - Create a new debug type node.
|
|
llvm::DIType CGDebugInfo::CreateTypeNode(QualType Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
// Handle qualifiers, which recursively handles what they refer to.
|
|
if (Ty.hasLocalQualifiers())
|
|
return CreateQualifiedType(Ty, Unit);
|
|
|
|
const char *Diag = 0;
|
|
|
|
// Work out details of type.
|
|
switch (Ty->getTypeClass()) {
|
|
#define TYPE(Class, Base)
|
|
#define ABSTRACT_TYPE(Class, Base)
|
|
#define NON_CANONICAL_TYPE(Class, Base)
|
|
#define DEPENDENT_TYPE(Class, Base) case Type::Class:
|
|
#include "clang/AST/TypeNodes.def"
|
|
assert(false && "Dependent types cannot show up in debug information");
|
|
|
|
// FIXME: Handle these.
|
|
case Type::ExtVector:
|
|
return llvm::DIType();
|
|
|
|
case Type::Vector:
|
|
return CreateType(cast<VectorType>(Ty), Unit);
|
|
case Type::ObjCObjectPointer:
|
|
return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
|
|
case Type::ObjCInterface:
|
|
return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
|
|
case Type::Builtin: return CreateType(cast<BuiltinType>(Ty), Unit);
|
|
case Type::Complex: return CreateType(cast<ComplexType>(Ty), Unit);
|
|
case Type::Pointer: return CreateType(cast<PointerType>(Ty), Unit);
|
|
case Type::BlockPointer:
|
|
return CreateType(cast<BlockPointerType>(Ty), Unit);
|
|
case Type::Typedef: return CreateType(cast<TypedefType>(Ty), Unit);
|
|
case Type::Record:
|
|
case Type::Enum:
|
|
return CreateType(cast<TagType>(Ty), Unit);
|
|
case Type::FunctionProto:
|
|
case Type::FunctionNoProto:
|
|
return CreateType(cast<FunctionType>(Ty), Unit);
|
|
case Type::ConstantArray:
|
|
case Type::VariableArray:
|
|
case Type::IncompleteArray:
|
|
return CreateType(cast<ArrayType>(Ty), Unit);
|
|
|
|
case Type::LValueReference:
|
|
return CreateType(cast<LValueReferenceType>(Ty), Unit);
|
|
|
|
case Type::MemberPointer:
|
|
return CreateType(cast<MemberPointerType>(Ty), Unit);
|
|
|
|
case Type::TemplateSpecialization:
|
|
case Type::Elaborated:
|
|
case Type::QualifiedName:
|
|
case Type::SubstTemplateTypeParm:
|
|
case Type::TypeOfExpr:
|
|
case Type::TypeOf:
|
|
case Type::Decltype:
|
|
llvm_unreachable("type should have been unwrapped!");
|
|
return llvm::DIType();
|
|
|
|
case Type::RValueReference:
|
|
// FIXME: Implement!
|
|
Diag = "rvalue references";
|
|
break;
|
|
}
|
|
|
|
assert(Diag && "Fall through without a diagnostic?");
|
|
unsigned DiagID = CGM.getDiags().getCustomDiagID(Diagnostic::Error,
|
|
"debug information for %0 is not yet supported");
|
|
CGM.getDiags().Report(FullSourceLoc(), DiagID)
|
|
<< Diag;
|
|
return llvm::DIType();
|
|
}
|
|
|
|
/// EmitFunctionStart - Constructs the debug code for entering a function -
|
|
/// "llvm.dbg.func.start.".
|
|
void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, QualType FnType,
|
|
llvm::Function *Fn,
|
|
CGBuilderTy &Builder) {
|
|
|
|
llvm::StringRef Name;
|
|
llvm::StringRef LinkageName;
|
|
|
|
const Decl *D = GD.getDecl();
|
|
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
|
|
// If there is a DISubprogram for this function available then use it.
|
|
llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator
|
|
FI = SPCache.find(FD);
|
|
if (FI != SPCache.end()) {
|
|
llvm::DISubprogram SP(dyn_cast_or_null<llvm::MDNode>(FI->second));
|
|
if (!SP.isNull() && SP.isSubprogram() && SP.isDefinition()) {
|
|
RegionStack.push_back(SP.getNode());
|
|
RegionMap[D] = llvm::WeakVH(SP.getNode());
|
|
return;
|
|
}
|
|
}
|
|
Name = getFunctionName(FD);
|
|
if (!Name.empty() && Name[0] == '\01')
|
|
Name = Name.substr(1);
|
|
// Use mangled name as linkage name for c/c++ functions.
|
|
LinkageName = CGM.getMangledName(GD);
|
|
} else {
|
|
// Use llvm function name as linkage name.
|
|
Name = Fn->getName();
|
|
LinkageName = Name;
|
|
if (!Name.empty() && Name[0] == '\01')
|
|
Name = Name.substr(1);
|
|
}
|
|
|
|
// It is expected that CurLoc is set before using EmitFunctionStart.
|
|
// Usually, CurLoc points to the left bracket location of compound
|
|
// statement representing function body.
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(CurLoc);
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
unsigned LineNo = SM.getPresumedLoc(CurLoc).getLine();
|
|
|
|
llvm::DISubprogram SP =
|
|
DebugFactory.CreateSubprogram(Unit, Name, Name, LinkageName, Unit, LineNo,
|
|
getOrCreateType(FnType, Unit),
|
|
Fn->hasInternalLinkage(), true/*definition*/);
|
|
|
|
// Push function on region stack.
|
|
RegionStack.push_back(SP.getNode());
|
|
RegionMap[D] = llvm::WeakVH(SP.getNode());
|
|
}
|
|
|
|
|
|
void CGDebugInfo::EmitStopPoint(llvm::Function *Fn, CGBuilderTy &Builder) {
|
|
if (CurLoc.isInvalid() || CurLoc.isMacroID()) return;
|
|
|
|
// Don't bother if things are the same as last time.
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
if (CurLoc == PrevLoc
|
|
|| (SM.getInstantiationLineNumber(CurLoc) ==
|
|
SM.getInstantiationLineNumber(PrevLoc)
|
|
&& SM.isFromSameFile(CurLoc, PrevLoc)))
|
|
return;
|
|
|
|
// Update last state.
|
|
PrevLoc = CurLoc;
|
|
|
|
// Get the appropriate compile unit.
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(CurLoc);
|
|
PresumedLoc PLoc = SM.getPresumedLoc(CurLoc);
|
|
|
|
llvm::DIDescriptor DR(RegionStack.back());
|
|
llvm::DIScope DS = llvm::DIScope(DR.getNode());
|
|
llvm::DILocation DO(NULL);
|
|
llvm::DILocation DL =
|
|
DebugFactory.CreateLocation(PLoc.getLine(), PLoc.getColumn(),
|
|
DS, DO);
|
|
Builder.SetCurrentDebugLocation(DL.getNode());
|
|
}
|
|
|
|
/// EmitRegionStart- Constructs the debug code for entering a declarative
|
|
/// region - "llvm.dbg.region.start.".
|
|
void CGDebugInfo::EmitRegionStart(llvm::Function *Fn, CGBuilderTy &Builder) {
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(CurLoc);
|
|
llvm::DIDescriptor D =
|
|
DebugFactory.CreateLexicalBlock(RegionStack.empty() ?
|
|
llvm::DIDescriptor() :
|
|
llvm::DIDescriptor(RegionStack.back()),
|
|
PLoc.getLine(), PLoc.getColumn());
|
|
RegionStack.push_back(D.getNode());
|
|
}
|
|
|
|
/// EmitRegionEnd - Constructs the debug code for exiting a declarative
|
|
/// region - "llvm.dbg.region.end."
|
|
void CGDebugInfo::EmitRegionEnd(llvm::Function *Fn, CGBuilderTy &Builder) {
|
|
assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
|
|
|
|
// Provide an region stop point.
|
|
EmitStopPoint(Fn, Builder);
|
|
|
|
RegionStack.pop_back();
|
|
}
|
|
|
|
// EmitTypeForVarWithBlocksAttr - Build up structure info for the byref.
|
|
// See BuildByRefType.
|
|
llvm::DIType CGDebugInfo::EmitTypeForVarWithBlocksAttr(const ValueDecl *VD,
|
|
uint64_t *XOffset) {
|
|
|
|
llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
|
|
|
|
QualType FType;
|
|
uint64_t FieldSize, FieldOffset;
|
|
unsigned FieldAlign;
|
|
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(VD->getLocation());
|
|
QualType Type = VD->getType();
|
|
|
|
FieldOffset = 0;
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
llvm::DIType FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__isa", llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__forwarding", llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
FType = CGM.getContext().IntTy;
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__flags", llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
FType = CGM.getContext().IntTy;
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__size", llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
bool HasCopyAndDispose = CGM.BlockRequiresCopying(Type);
|
|
if (HasCopyAndDispose) {
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__copy_helper",
|
|
llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__destroy_helper",
|
|
llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
}
|
|
|
|
CharUnits Align = CGM.getContext().getDeclAlign(VD);
|
|
if (Align > CharUnits::fromQuantity(
|
|
CGM.getContext().Target.getPointerAlign(0) / 8)) {
|
|
unsigned AlignedOffsetInBytes
|
|
= llvm::RoundUpToAlignment(FieldOffset/8, Align.getQuantity());
|
|
unsigned NumPaddingBytes
|
|
= AlignedOffsetInBytes - FieldOffset/8;
|
|
|
|
if (NumPaddingBytes > 0) {
|
|
llvm::APInt pad(32, NumPaddingBytes);
|
|
FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
|
|
pad, ArrayType::Normal, 0);
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
}
|
|
}
|
|
|
|
FType = Type;
|
|
FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
FieldSize = CGM.getContext().getTypeSize(FType);
|
|
FieldAlign = Align.getQuantity()*8;
|
|
|
|
*XOffset = FieldOffset;
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
VD->getName(), llvm::DICompileUnit(),
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
unsigned Flags = llvm::DIType::FlagBlockByrefStruct;
|
|
|
|
return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
|
|
Unit, "",
|
|
llvm::DICompileUnit(),
|
|
0, FieldOffset, 0, 0, Flags,
|
|
llvm::DIType(), Elements);
|
|
|
|
}
|
|
/// EmitDeclare - Emit local variable declaration debug info.
|
|
void CGDebugInfo::EmitDeclare(const VarDecl *VD, unsigned Tag,
|
|
llvm::Value *Storage, CGBuilderTy &Builder) {
|
|
assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
|
|
|
|
// Do not emit variable debug information while generating optimized code.
|
|
// The llvm optimizer and code generator are not yet ready to support
|
|
// optimized code debugging.
|
|
const CodeGenOptions &CGO = CGM.getCodeGenOpts();
|
|
if (CGO.OptimizationLevel)
|
|
return;
|
|
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(VD->getLocation());
|
|
llvm::DIType Ty;
|
|
uint64_t XOffset = 0;
|
|
if (VD->hasAttr<BlocksAttr>())
|
|
Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
|
|
else
|
|
Ty = getOrCreateType(VD->getType(), Unit);
|
|
|
|
// Get location information.
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(VD->getLocation());
|
|
unsigned Line = 0;
|
|
unsigned Column = 0;
|
|
if (PLoc.isInvalid())
|
|
PLoc = SM.getPresumedLoc(CurLoc);
|
|
if (PLoc.isValid()) {
|
|
Line = PLoc.getLine();
|
|
Column = PLoc.getColumn();
|
|
Unit = getOrCreateCompileUnit(CurLoc);
|
|
} else {
|
|
Unit = llvm::DICompileUnit();
|
|
}
|
|
|
|
// Create the descriptor for the variable.
|
|
llvm::DIVariable D =
|
|
DebugFactory.CreateVariable(Tag, llvm::DIDescriptor(RegionStack.back()),
|
|
VD->getName(),
|
|
Unit, Line, Ty);
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
llvm::Instruction *Call =
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
|
|
llvm::DIScope DS(RegionStack.back());
|
|
llvm::DILocation DO(NULL);
|
|
llvm::DILocation DL = DebugFactory.CreateLocation(Line, Column, DS, DO);
|
|
|
|
Call->setMetadata("dbg", DL.getNode());
|
|
}
|
|
|
|
/// EmitDeclare - Emit local variable declaration debug info.
|
|
void CGDebugInfo::EmitDeclare(const BlockDeclRefExpr *BDRE, unsigned Tag,
|
|
llvm::Value *Storage, CGBuilderTy &Builder,
|
|
CodeGenFunction *CGF) {
|
|
const ValueDecl *VD = BDRE->getDecl();
|
|
assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
|
|
|
|
// Do not emit variable debug information while generating optimized code.
|
|
// The llvm optimizer and code generator are not yet ready to support
|
|
// optimized code debugging.
|
|
const CodeGenOptions &CGO = CGM.getCodeGenOpts();
|
|
if (CGO.OptimizationLevel || Builder.GetInsertBlock() == 0)
|
|
return;
|
|
|
|
uint64_t XOffset = 0;
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(VD->getLocation());
|
|
llvm::DIType Ty;
|
|
if (VD->hasAttr<BlocksAttr>())
|
|
Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
|
|
else
|
|
Ty = getOrCreateType(VD->getType(), Unit);
|
|
|
|
// Get location information.
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(VD->getLocation());
|
|
unsigned Line = 0;
|
|
if (!PLoc.isInvalid())
|
|
Line = PLoc.getLine();
|
|
else
|
|
Unit = llvm::DICompileUnit();
|
|
|
|
CharUnits offset = CGF->BlockDecls[VD];
|
|
llvm::SmallVector<llvm::Value *, 9> addr;
|
|
const llvm::Type *Int64Ty = llvm::Type::getInt64Ty(CGM.getLLVMContext());
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
|
|
if (BDRE->isByRef()) {
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
|
|
// offset of __forwarding field
|
|
offset = CharUnits::fromQuantity(CGF->LLVMPointerWidth/8);
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
|
|
// offset of x field
|
|
offset = CharUnits::fromQuantity(XOffset/8);
|
|
addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
|
|
}
|
|
|
|
// Create the descriptor for the variable.
|
|
llvm::DIVariable D =
|
|
DebugFactory.CreateComplexVariable(Tag,
|
|
llvm::DIDescriptor(RegionStack.back()),
|
|
VD->getName(), Unit, Line, Ty,
|
|
addr);
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
llvm::Instruction *Call =
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
|
|
llvm::DIScope DS(RegionStack.back());
|
|
llvm::DILocation DO(NULL);
|
|
llvm::DILocation DL =
|
|
DebugFactory.CreateLocation(Line, PLoc.getColumn(), DS, DO);
|
|
|
|
Call->setMetadata("dbg", DL.getNode());
|
|
}
|
|
|
|
void CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD,
|
|
llvm::Value *Storage,
|
|
CGBuilderTy &Builder) {
|
|
EmitDeclare(VD, llvm::dwarf::DW_TAG_auto_variable, Storage, Builder);
|
|
}
|
|
|
|
void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
|
|
const BlockDeclRefExpr *BDRE, llvm::Value *Storage, CGBuilderTy &Builder,
|
|
CodeGenFunction *CGF) {
|
|
EmitDeclare(BDRE, llvm::dwarf::DW_TAG_auto_variable, Storage, Builder, CGF);
|
|
}
|
|
|
|
/// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
|
|
/// variable declaration.
|
|
void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
|
|
CGBuilderTy &Builder) {
|
|
EmitDeclare(VD, llvm::dwarf::DW_TAG_arg_variable, AI, Builder);
|
|
}
|
|
|
|
|
|
|
|
/// EmitGlobalVariable - Emit information about a global variable.
|
|
void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
|
|
const VarDecl *D) {
|
|
|
|
// Create global variable debug descriptor.
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(D->getLocation());
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(D->getLocation());
|
|
unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
QualType T = D->getType();
|
|
if (T->isIncompleteArrayType()) {
|
|
|
|
// CodeGen turns int[] into int[1] so we'll do the same here.
|
|
llvm::APSInt ConstVal(32);
|
|
|
|
ConstVal = 1;
|
|
QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
|
|
|
|
T = CGM.getContext().getConstantArrayType(ET, ConstVal,
|
|
ArrayType::Normal, 0);
|
|
}
|
|
llvm::StringRef DeclName = Var->getName();
|
|
llvm::DIDescriptor DContext =
|
|
getContextDescriptor(dyn_cast<Decl>(D->getDeclContext()), Unit);
|
|
DebugFactory.CreateGlobalVariable(DContext, DeclName,
|
|
DeclName, llvm::StringRef(), Unit, LineNo,
|
|
getOrCreateType(T, Unit),
|
|
Var->hasInternalLinkage(),
|
|
true/*definition*/, Var);
|
|
}
|
|
|
|
/// EmitGlobalVariable - Emit information about an objective-c interface.
|
|
void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
|
|
ObjCInterfaceDecl *ID) {
|
|
// Create global variable debug descriptor.
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(ID->getLocation());
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(ID->getLocation());
|
|
unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
llvm::StringRef Name = ID->getName();
|
|
|
|
QualType T = CGM.getContext().getObjCInterfaceType(ID);
|
|
if (T->isIncompleteArrayType()) {
|
|
|
|
// CodeGen turns int[] into int[1] so we'll do the same here.
|
|
llvm::APSInt ConstVal(32);
|
|
|
|
ConstVal = 1;
|
|
QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
|
|
|
|
T = CGM.getContext().getConstantArrayType(ET, ConstVal,
|
|
ArrayType::Normal, 0);
|
|
}
|
|
|
|
DebugFactory.CreateGlobalVariable(Unit, Name, Name, Name, Unit, LineNo,
|
|
getOrCreateType(T, Unit),
|
|
Var->hasInternalLinkage(),
|
|
true/*definition*/, Var);
|
|
}
|
|
|
|
/// getOrCreateNamesSpace - Return namespace descriptor for the given
|
|
/// namespace decl.
|
|
llvm::DINameSpace
|
|
CGDebugInfo::getOrCreateNameSpace(const NamespaceDecl *NSDecl,
|
|
llvm::DIDescriptor Unit) {
|
|
llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH>::iterator I =
|
|
NameSpaceCache.find(NSDecl);
|
|
if (I != NameSpaceCache.end())
|
|
return llvm::DINameSpace(cast<llvm::MDNode>(I->second));
|
|
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(NSDecl->getLocation());
|
|
unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
|
|
|
|
llvm::DIDescriptor Context =
|
|
getContextDescriptor(dyn_cast<Decl>(NSDecl->getDeclContext()), Unit);
|
|
llvm::DINameSpace NS =
|
|
DebugFactory.CreateNameSpace(Context, NSDecl->getName(),
|
|
llvm::DICompileUnit(Unit.getNode()), LineNo);
|
|
NameSpaceCache[NSDecl] = llvm::WeakVH(NS.getNode());
|
|
return NS;
|
|
}
|