1008 lines
39 KiB
C++
1008 lines
39 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 "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/Frontend/CompileOptions.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 *m)
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: M(m), isMainCompileUnitCreated(false), DebugFactory(M->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 = M->getContext().getSourceManager().getInstantiationLoc(Loc);
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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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// Each input file is encoded as a separate compile unit in LLVM
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// debugging information output. However, many target specific tool chains
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// prefer to encode only one compile unit in an object file. In this
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// situation, the LLVM code generator will include debugging information
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// entities in the compile unit that is marked as main compile unit. The
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// code generator accepts maximum one main compile unit per module. If a
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// module does not contain any main compile unit then the code generator
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// will emit multiple compile units in the output object file. Create main
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// compile unit if there is not one available.
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const LangOptions &LO = M->getLangOptions();
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if (isMainCompileUnitCreated == false) {
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if (LO.getMainFileName()) {
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createCompileUnit(LO.getMainFileName(), true /* isMain */);
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isMainCompileUnitCreated = true;
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}
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}
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// Get source file information.
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const char *FileName = "<unknown>";
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SourceManager &SM = M->getContext().getSourceManager();
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unsigned FID = 0;
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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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FID = PLoc.getIncludeLoc().getRawEncoding();
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}
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// See if this compile unit has been used before.
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llvm::DICompileUnit &Unit = CompileUnitCache[FID];
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if (!Unit.isNull()) return Unit;
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// Get absolute path name.
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llvm::sys::Path AbsFileName(FileName);
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if (!AbsFileName.isAbsolute()) {
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llvm::sys::Path tmp = llvm::sys::Path::GetCurrentDirectory();
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tmp.appendComponent(FileName);
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AbsFileName = tmp;
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}
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// There is only one main source file at a time whose compile unit
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// is already created.
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Unit = createCompileUnit(FileName, false /* isMain */);
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return Unit;
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}
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/// createCompileUnit - Create a new unit for the given file.
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llvm::DICompileUnit CGDebugInfo::createCompileUnit(const char *FileName,
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bool isMain) {
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// Get absolute path name.
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llvm::sys::Path AbsFileName(FileName);
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if (!AbsFileName.isAbsolute()) {
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llvm::sys::Path tmp = llvm::sys::Path::GetCurrentDirectory();
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tmp.appendComponent(FileName);
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AbsFileName = tmp;
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}
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unsigned LangTag;
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const LangOptions &LO = M->getLangOptions();
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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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std::string Producer = "clang 1.0";// FIXME: clang version.
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bool isOptimized = LO.Optimize;
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const char *Flags = ""; // FIXME: Encode command line options.
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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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return DebugFactory.CreateCompileUnit(LangTag, AbsFileName.getLast(),
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AbsFileName.getDirname(),
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Producer, isMain, isOptimized,
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Flags, RuntimeVers);
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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::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 = M->getContext().getTypeSize(BT);
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uint64_t Align = M->getContext().getTypeAlign(BT);
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uint64_t Offset = 0;
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return DebugFactory.CreateBasicType(Unit,
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BT->getName(M->getContext().getLangOptions().CPlusPlus),
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Unit, 0, Size, Align,
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Offset, /*flags*/ 0, Encoding);
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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 = M->getContext().getTypeSize(Ty);
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uint64_t Align = M->getContext().getTypeAlign(Ty);
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uint64_t Offset = 0;
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return DebugFactory.CreateBasicType(Unit, "complex",
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Unit, 0, Size, Align,
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Offset, /*flags*/ 0, Encoding);
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}
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/// getOrCreateCVRType - Get the CVR qualified type from the cache or create
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/// a new one if necessary.
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llvm::DIType CGDebugInfo::CreateCVRType(QualType Ty, llvm::DICompileUnit Unit) {
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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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llvm::DIType FromTy;
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unsigned Tag;
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if (Ty.isConstQualified()) {
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Tag = llvm::dwarf::DW_TAG_const_type;
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Ty.removeConst();
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FromTy = getOrCreateType(Ty, Unit);
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} else if (Ty.isVolatileQualified()) {
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Tag = llvm::dwarf::DW_TAG_volatile_type;
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Ty.removeVolatile();
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FromTy = getOrCreateType(Ty, Unit);
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} else {
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assert(Ty.isRestrictQualified() && "Unknown type qualifier for debug info");
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Tag = llvm::dwarf::DW_TAG_restrict_type;
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Ty.removeRestrict();
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FromTy = getOrCreateType(Ty, Unit);
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}
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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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return DebugFactory.CreateDerivedType(Tag, Unit, "", llvm::DICompileUnit(),
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0, 0, 0, 0, 0, FromTy);
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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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llvm::DIType EltTy = getOrCreateType(Ty->getPointeeType(), Unit);
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// Bit size, align and offset of the type.
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uint64_t Size = M->getContext().getTypeSize(Ty);
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uint64_t Align = M->getContext().getTypeAlign(Ty);
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return 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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}
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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 = M->getContext().UnsignedLongTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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 = M->getContext().UnsignedLongTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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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EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_descriptor",
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DefUnit, 0, FieldOffset, 0, 0, 0,
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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 = M->getContext().getTypeSize(Ty);
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uint64_t Align = M->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 = M->getContext().getPointerType(M->getContext().VoidTy);
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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 = M->getContext().IntTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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 = M->getContext().IntTy;
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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 = M->getContext().getPointerType(M->getContext().VoidTy);
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FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
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FieldSize = M->getContext().getTypeSize(FType);
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FieldAlign = M->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 = M->getContext().getPointerType(M->getContext().VoidTy);
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FieldTy = DescTy;
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FieldSize = M->getContext().getTypeSize(Ty);
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FieldAlign = M->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, 0,
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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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std::string TyName = Ty->getDecl()->getNameAsString();
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SourceLocation DefLoc = Ty->getDecl()->getLocation();
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llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(DefLoc);
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SourceManager &SM = M->getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(DefLoc);
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unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
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return DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_typedef, Unit,
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TyName, DefUnit, Line, 0, 0, 0, 0, Src);
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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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return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
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Unit, "", llvm::DICompileUnit(),
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0, 0, 0, 0, 0,
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llvm::DIType(), EltTypeArray);
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}
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/// CreateType - get structure or union type.
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llvm::DIType CGDebugInfo::CreateType(const RecordType *Ty,
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llvm::DICompileUnit Unit) {
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RecordDecl *Decl = Ty->getDecl();
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unsigned Tag;
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if (Decl->isStruct())
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Tag = llvm::dwarf::DW_TAG_structure_type;
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else if (Decl->isUnion())
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Tag = llvm::dwarf::DW_TAG_union_type;
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else {
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assert(Decl->isClass() && "Unknown RecordType!");
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Tag = llvm::dwarf::DW_TAG_class_type;
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}
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SourceManager &SM = M->getContext().getSourceManager();
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// Get overall information about the record type for the debug info.
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std::string Name = Decl->getNameAsString();
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PresumedLoc PLoc = SM.getPresumedLoc(Decl->getLocation());
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llvm::DICompileUnit DefUnit;
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unsigned Line = 0;
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if (!PLoc.isInvalid()) {
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DefUnit = getOrCreateCompileUnit(Decl->getLocation());
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Line = PLoc.getLine();
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}
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// Records and classes and unions can all be recursive. To handle them, we
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// first generate a debug descriptor for the struct as a forward declaration.
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// Then (if it is a definition) we go through and get debug info for all of
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// its members. Finally, we create a descriptor for the complete type (which
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// may refer to the forward decl if the struct is recursive) and replace all
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// uses of the forward declaration with the final definition.
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llvm::DIType FwdDecl =
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DebugFactory.CreateCompositeType(Tag, Unit, Name, DefUnit, Line, 0, 0, 0, 0,
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llvm::DIType(), llvm::DIArray());
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// If this is just a forward declaration, return it.
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if (!Decl->getDefinition(M->getContext()))
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return FwdDecl;
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// Otherwise, insert it into the TypeCache so that recursive uses will find
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// it.
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TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl;
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// Convert all the elements.
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llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
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const ASTRecordLayout &RL = M->getContext().getASTRecordLayout(Decl);
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unsigned FieldNo = 0;
|
|
for (RecordDecl::field_iterator I = Decl->field_begin(M->getContext()),
|
|
E = Decl->field_end(M->getContext());
|
|
I != E; ++I, ++FieldNo) {
|
|
FieldDecl *Field = *I;
|
|
llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
|
|
|
|
std::string FieldName = Field->getNameAsString();
|
|
|
|
// Ignore unnamed fields.
|
|
if (FieldName.empty())
|
|
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 = M->getContext().getTypeSize(FType);
|
|
Expr *BitWidth = Field->getBitWidth();
|
|
if (BitWidth)
|
|
FieldSize = BitWidth->EvaluateAsInt(M->getContext()).getZExtValue();
|
|
|
|
FieldAlign = M->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);
|
|
}
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
// Bit size, align and offset of the type.
|
|
uint64_t Size = M->getContext().getTypeSize(Ty);
|
|
uint64_t Align = M->getContext().getTypeAlign(Ty);
|
|
|
|
llvm::DIType RealDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, Name, DefUnit, Line, Size,
|
|
Align, 0, 0, llvm::DIType(), Elements);
|
|
|
|
// 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.
|
|
FwdDecl.getGV()->replaceAllUsesWith(RealDecl.getGV());
|
|
FwdDecl.getGV()->eraseFromParent();
|
|
|
|
return RealDecl;
|
|
}
|
|
|
|
/// CreateType - get objective-c interface type.
|
|
llvm::DIType CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
ObjCInterfaceDecl *Decl = Ty->getDecl();
|
|
|
|
unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
|
|
SourceManager &SM = M->getContext().getSourceManager();
|
|
|
|
// Get overall information about the record type for the debug info.
|
|
std::string Name = Decl->getNameAsString();
|
|
|
|
llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(Decl->getLocation());
|
|
PresumedLoc PLoc = SM.getPresumedLoc(Decl->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::DIType FwdDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, Name, DefUnit, Line, 0, 0, 0, 0,
|
|
llvm::DIType(), llvm::DIArray(),
|
|
RuntimeLang);
|
|
|
|
// If this is just a forward declaration, return it.
|
|
if (Decl->isForwardDecl())
|
|
return FwdDecl;
|
|
|
|
// Otherwise, insert it into the TypeCache so that recursive uses will find
|
|
// it.
|
|
TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl;
|
|
|
|
// Convert all the elements.
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
|
|
|
|
ObjCInterfaceDecl *SClass = Decl->getSuperClass();
|
|
if (SClass) {
|
|
llvm::DIType SClassTy =
|
|
getOrCreateType(M->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 = M->getContext().getASTObjCInterfaceLayout(Decl);
|
|
|
|
unsigned FieldNo = 0;
|
|
for (ObjCInterfaceDecl::ivar_iterator I = Decl->ivar_begin(),
|
|
E = Decl->ivar_end(); I != E; ++I, ++FieldNo) {
|
|
ObjCIvarDecl *Field = *I;
|
|
llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
|
|
|
|
std::string FieldName = Field->getNameAsString();
|
|
|
|
// 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 = M->getContext().getTypeSize(FType);
|
|
Expr *BitWidth = Field->getBitWidth();
|
|
if (BitWidth)
|
|
FieldSize = BitWidth->EvaluateAsInt(M->getContext()).getZExtValue();
|
|
|
|
FieldAlign = M->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 = M->getContext().getTypeSize(Ty);
|
|
uint64_t Align = M->getContext().getTypeAlign(Ty);
|
|
|
|
llvm::DIType RealDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, Name, 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.
|
|
FwdDecl.getGV()->replaceAllUsesWith(RealDecl.getGV());
|
|
FwdDecl.getGV()->eraseFromParent();
|
|
|
|
return RealDecl;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const EnumType *Ty,
|
|
llvm::DICompileUnit Unit) {
|
|
EnumDecl *Decl = Ty->getDecl();
|
|
|
|
llvm::SmallVector<llvm::DIDescriptor, 32> Enumerators;
|
|
|
|
// Create DIEnumerator elements for each enumerator.
|
|
for (EnumDecl::enumerator_iterator
|
|
Enum = Decl->enumerator_begin(M->getContext()),
|
|
EnumEnd = Decl->enumerator_end(M->getContext());
|
|
Enum != EnumEnd; ++Enum) {
|
|
Enumerators.push_back(DebugFactory.CreateEnumerator(Enum->getNameAsString(),
|
|
Enum->getInitVal().getZExtValue()));
|
|
}
|
|
|
|
// Return a CompositeType for the enum itself.
|
|
llvm::DIArray EltArray =
|
|
DebugFactory.GetOrCreateArray(Enumerators.data(), Enumerators.size());
|
|
|
|
std::string EnumName = Decl->getNameAsString();
|
|
SourceLocation DefLoc = Decl->getLocation();
|
|
llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(DefLoc);
|
|
SourceManager &SM = M->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 = M->getContext().getTypeSize(Ty);
|
|
Align = M->getContext().getTypeAlign(Ty);
|
|
}
|
|
|
|
return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_enumeration_type,
|
|
Unit, EnumName, DefUnit, Line,
|
|
Size, Align, 0, 0,
|
|
llvm::DIType(), EltArray);
|
|
}
|
|
|
|
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 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 =
|
|
M->getContext().getTypeAlign(M->getContext().getBaseElementType(VAT));
|
|
} else if (Ty->isIncompleteArrayType()) {
|
|
Size = 0;
|
|
Align = M->getContext().getTypeAlign(Ty->getElementType());
|
|
} else {
|
|
// Size and align of the whole array, not the element type.
|
|
Size = M->getContext().getTypeSize(Ty);
|
|
Align = M->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))
|
|
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());
|
|
|
|
return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_array_type,
|
|
Unit, "", llvm::DICompileUnit(),
|
|
0, Size, Align, 0, 0,
|
|
getOrCreateType(EltTy, Unit),
|
|
SubscriptArray);
|
|
}
|
|
|
|
|
|
/// 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();
|
|
|
|
// Check to see if the compile unit already has created this type.
|
|
llvm::DIType &Slot = TypeCache[Ty.getAsOpaquePtr()];
|
|
if (!Slot.isNull()) return Slot;
|
|
|
|
// Handle CVR qualifiers, which recursively handles what they refer to.
|
|
if (Ty.getCVRQualifiers())
|
|
return Slot = CreateCVRType(Ty, Unit);
|
|
|
|
// 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");
|
|
|
|
case Type::LValueReference:
|
|
case Type::RValueReference:
|
|
case Type::Vector:
|
|
case Type::ExtVector:
|
|
case Type::ExtQual:
|
|
case Type::FixedWidthInt:
|
|
case Type::MemberPointer:
|
|
case Type::TemplateSpecialization:
|
|
case Type::QualifiedName:
|
|
// Unsupported types
|
|
return llvm::DIType();
|
|
case Type::ObjCObjectPointer: // Encode id<p> in debug info just like id.
|
|
return Slot = getOrCreateType(M->getContext().getObjCIdType(), Unit);
|
|
|
|
case Type::ObjCQualifiedInterface: // Drop protocols from interface.
|
|
case Type::ObjCInterface:
|
|
return Slot = CreateType(cast<ObjCInterfaceType>(Ty), Unit);
|
|
case Type::Builtin: return Slot = CreateType(cast<BuiltinType>(Ty), Unit);
|
|
case Type::Complex: return Slot = CreateType(cast<ComplexType>(Ty), Unit);
|
|
case Type::Pointer: return Slot = CreateType(cast<PointerType>(Ty), Unit);
|
|
case Type::BlockPointer:
|
|
return Slot = CreateType(cast<BlockPointerType>(Ty), Unit);
|
|
case Type::Typedef: return Slot = CreateType(cast<TypedefType>(Ty), Unit);
|
|
case Type::Record:
|
|
case Type::Enum:
|
|
return Slot = CreateType(cast<TagType>(Ty), Unit);
|
|
case Type::FunctionProto:
|
|
case Type::FunctionNoProto:
|
|
return Slot = CreateType(cast<FunctionType>(Ty), Unit);
|
|
|
|
case Type::ConstantArray:
|
|
case Type::VariableArray:
|
|
case Type::IncompleteArray:
|
|
return Slot = CreateType(cast<ArrayType>(Ty), Unit);
|
|
case Type::TypeOfExpr:
|
|
return Slot = getOrCreateType(cast<TypeOfExprType>(Ty)->getUnderlyingExpr()
|
|
->getType(), Unit);
|
|
case Type::TypeOf:
|
|
return Slot = getOrCreateType(cast<TypeOfType>(Ty)->getUnderlyingType(),
|
|
Unit);
|
|
}
|
|
|
|
return Slot;
|
|
}
|
|
|
|
/// EmitFunctionStart - Constructs the debug code for entering a function -
|
|
/// "llvm.dbg.func.start.".
|
|
void CGDebugInfo::EmitFunctionStart(const char *Name, QualType ReturnType,
|
|
llvm::Function *Fn,
|
|
CGBuilderTy &Builder) {
|
|
const char *LinkageName = Name;
|
|
|
|
// Skip the asm prefix if it exists.
|
|
//
|
|
// FIXME: This should probably be the unmangled name?
|
|
if (Name[0] == '\01')
|
|
++Name;
|
|
|
|
// FIXME: Why is this using CurLoc???
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(CurLoc);
|
|
SourceManager &SM = M->getContext().getSourceManager();
|
|
unsigned LineNo = SM.getPresumedLoc(CurLoc).getLine();
|
|
|
|
llvm::DISubprogram SP =
|
|
DebugFactory.CreateSubprogram(Unit, Name, Name, LinkageName, Unit, LineNo,
|
|
getOrCreateType(ReturnType, Unit),
|
|
Fn->hasInternalLinkage(), true/*definition*/);
|
|
|
|
DebugFactory.InsertSubprogramStart(SP, Builder.GetInsertBlock());
|
|
|
|
// Push function on region stack.
|
|
RegionStack.push_back(SP);
|
|
}
|
|
|
|
|
|
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 = M->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);
|
|
DebugFactory.InsertStopPoint(Unit, PLoc.getLine(), PLoc.getColumn(),
|
|
Builder.GetInsertBlock());
|
|
}
|
|
|
|
/// EmitRegionStart- Constructs the debug code for entering a declarative
|
|
/// region - "llvm.dbg.region.start.".
|
|
void CGDebugInfo::EmitRegionStart(llvm::Function *Fn, CGBuilderTy &Builder) {
|
|
llvm::DIDescriptor D;
|
|
if (!RegionStack.empty())
|
|
D = RegionStack.back();
|
|
D = DebugFactory.CreateBlock(D);
|
|
RegionStack.push_back(D);
|
|
DebugFactory.InsertRegionStart(D, Builder.GetInsertBlock());
|
|
}
|
|
|
|
/// 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);
|
|
|
|
DebugFactory.InsertRegionEnd(RegionStack.back(), Builder.GetInsertBlock());
|
|
RegionStack.pop_back();
|
|
}
|
|
|
|
/// EmitDeclare - Emit local variable declaration debug info.
|
|
void CGDebugInfo::EmitDeclare(const VarDecl *Decl, 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 CompileOptions &CO = M->getCompileOpts();
|
|
if (CO.OptimizationLevel)
|
|
return;
|
|
|
|
llvm::DICompileUnit Unit = getOrCreateCompileUnit(Decl->getLocation());
|
|
llvm::DIType Ty = getOrCreateType(Decl->getType(), Unit);
|
|
|
|
// Get location information.
|
|
SourceManager &SM = M->getContext().getSourceManager();
|
|
PresumedLoc PLoc = SM.getPresumedLoc(Decl->getLocation());
|
|
unsigned Line = 0;
|
|
if (!PLoc.isInvalid())
|
|
Line = PLoc.getLine();
|
|
else
|
|
Unit = llvm::DICompileUnit();
|
|
|
|
|
|
// Create the descriptor for the variable.
|
|
llvm::DIVariable D =
|
|
DebugFactory.CreateVariable(Tag, RegionStack.back(),Decl->getNameAsString(),
|
|
Unit, Line, Ty);
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
}
|
|
|
|
void CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *Decl,
|
|
llvm::Value *Storage,
|
|
CGBuilderTy &Builder) {
|
|
EmitDeclare(Decl, llvm::dwarf::DW_TAG_auto_variable, Storage, Builder);
|
|
}
|
|
|
|
/// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
|
|
/// variable declaration.
|
|
void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *Decl, llvm::Value *AI,
|
|
CGBuilderTy &Builder) {
|
|
EmitDeclare(Decl, llvm::dwarf::DW_TAG_arg_variable, AI, Builder);
|
|
}
|
|
|
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/// EmitGlobalVariable - Emit information about a global variable.
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void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
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const VarDecl *Decl) {
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// Do not emit variable debug information while generating optimized code.
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// The llvm optimizer and code generator are not yet ready to support
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// optimized code debugging.
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const CompileOptions &CO = M->getCompileOpts();
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if (CO.OptimizationLevel)
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return;
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// Create global variable debug descriptor.
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llvm::DICompileUnit Unit = getOrCreateCompileUnit(Decl->getLocation());
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SourceManager &SM = M->getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Decl->getLocation());
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unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
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std::string Name = Decl->getNameAsString();
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QualType T = Decl->getType();
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if (T->isIncompleteArrayType()) {
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// CodeGen turns int[] into int[1] so we'll do the same here.
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llvm::APSInt ConstVal(32);
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ConstVal = 1;
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QualType ET = M->getContext().getAsArrayType(T)->getElementType();
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T = M->getContext().getConstantArrayType(ET, ConstVal,
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ArrayType::Normal, 0);
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}
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DebugFactory.CreateGlobalVariable(Unit, Name, Name, "", Unit, LineNo,
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getOrCreateType(T, Unit),
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Var->hasInternalLinkage(),
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true/*definition*/, Var);
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}
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/// EmitGlobalVariable - Emit information about an objective-c interface.
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void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
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ObjCInterfaceDecl *Decl) {
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// Create global variable debug descriptor.
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llvm::DICompileUnit Unit = getOrCreateCompileUnit(Decl->getLocation());
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SourceManager &SM = M->getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Decl->getLocation());
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unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
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std::string Name = Decl->getNameAsString();
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QualType T = M->getContext().getObjCInterfaceType(Decl);
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if (T->isIncompleteArrayType()) {
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// CodeGen turns int[] into int[1] so we'll do the same here.
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llvm::APSInt ConstVal(32);
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ConstVal = 1;
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QualType ET = M->getContext().getAsArrayType(T)->getElementType();
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T = M->getContext().getConstantArrayType(ET, ConstVal,
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ArrayType::Normal, 0);
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}
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DebugFactory.CreateGlobalVariable(Unit, Name, Name, "", Unit, LineNo,
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getOrCreateType(T, Unit),
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Var->hasInternalLinkage(),
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true/*definition*/, Var);
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}
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