2052 lines
78 KiB
C++
2052 lines
78 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/DeclFriend.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/DeclTemplate.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/Frontend/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), DebugFactory(CGM.getModule()),
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BlockLiteralGenericSet(false) {
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CreateCompileUnit();
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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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if (const RecordDecl *RDecl = dyn_cast<RecordDecl>(Context)) {
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if (!RDecl->isDependentType()) {
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llvm::DIType Ty = getOrCreateType(CGM.getContext().getTypeDeclType(RDecl),
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llvm::DIFile(CompileUnit));
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return llvm::DIDescriptor(Ty);
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}
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}
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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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llvm::StringRef CGDebugInfo::getObjCMethodName(const ObjCMethodDecl *OMD) {
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llvm::SmallString<256> MethodName;
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llvm::raw_svector_ostream OS(MethodName);
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OS << (OMD->isInstanceMethod() ? '-' : '+') << '[';
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const DeclContext *DC = OMD->getDeclContext();
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if (const ObjCImplementationDecl *OID =
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dyn_cast<const ObjCImplementationDecl>(DC)) {
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OS << OID->getName();
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} else if (const ObjCInterfaceDecl *OID =
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dyn_cast<const ObjCInterfaceDecl>(DC)) {
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OS << OID->getName();
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} else if (const ObjCCategoryImplDecl *OCD =
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dyn_cast<const ObjCCategoryImplDecl>(DC)){
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OS << ((NamedDecl *)OCD)->getIdentifier()->getNameStart() << '(' <<
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OCD->getIdentifier()->getNameStart() << ')';
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}
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OS << ' ' << OMD->getSelector().getAsString() << ']';
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char *StrPtr = DebugInfoNames.Allocate<char>(OS.tell());
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memcpy(StrPtr, MethodName.begin(), OS.tell());
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return llvm::StringRef(StrPtr, OS.tell());
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}
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/// getClassName - Get class name including template argument list.
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llvm::StringRef
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CGDebugInfo::getClassName(RecordDecl *RD) {
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ClassTemplateSpecializationDecl *Spec
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= dyn_cast<ClassTemplateSpecializationDecl>(RD);
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if (!Spec)
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return RD->getName();
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const TemplateArgument *Args;
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unsigned NumArgs;
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std::string Buffer;
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if (TypeSourceInfo *TAW = Spec->getTypeAsWritten()) {
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const TemplateSpecializationType *TST =
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cast<TemplateSpecializationType>(TAW->getType());
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Args = TST->getArgs();
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NumArgs = TST->getNumArgs();
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} else {
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const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
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Args = TemplateArgs.getFlatArgumentList();
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NumArgs = TemplateArgs.flat_size();
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}
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Buffer = RD->getIdentifier()->getNameStart();
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PrintingPolicy Policy(CGM.getLangOptions());
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Buffer += TemplateSpecializationType::PrintTemplateArgumentList(Args,
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NumArgs,
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Policy);
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// Copy this name on the side and use its reference.
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char *StrPtr = DebugInfoNames.Allocate<char>(Buffer.length());
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memcpy(StrPtr, Buffer.data(), Buffer.length());
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return llvm::StringRef(StrPtr, Buffer.length());
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}
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/// getOrCreateFile - Get the file debug info descriptor for the input location.
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llvm::DIFile CGDebugInfo::getOrCreateFile(SourceLocation Loc) {
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if (!Loc.isValid())
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// If Location is not valid then use main input file.
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return DebugFactory.CreateFile(TheCU.getFilename(), TheCU.getDirectory(),
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TheCU);
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SourceManager &SM = CGM.getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Loc);
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// Cache the results.
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const char *fname = PLoc.getFilename();
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llvm::DenseMap<const char *, llvm::WeakVH>::iterator it =
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DIFileCache.find(fname);
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if (it != DIFileCache.end()) {
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// Verify that the information still exists.
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if (&*it->second)
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return llvm::DIFile(cast<llvm::MDNode>(it->second));
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}
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llvm::DIFile F = DebugFactory.CreateFile(PLoc.getFilename(),
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getCurrentDirname(), TheCU);
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DIFileCache[fname] = F;
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return F;
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}
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/// getOrCreateMainFile - Get the file info for main compile unit.
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llvm::DIFile CGDebugInfo::getOrCreateMainFile() {
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return DebugFactory.CreateFile(TheCU.getFilename(), TheCU.getDirectory(),
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TheCU);
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}
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/// getLineNumber - Get line number for the location. If location is invalid
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/// then use current location.
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unsigned CGDebugInfo::getLineNumber(SourceLocation Loc) {
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assert (CurLoc.isValid() && "Invalid current location!");
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SourceManager &SM = CGM.getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
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return PLoc.getLine();
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}
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/// getColumnNumber - Get column number for the location. If location is
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/// invalid then use current location.
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unsigned CGDebugInfo::getColumnNumber(SourceLocation Loc) {
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assert (CurLoc.isValid() && "Invalid current location!");
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SourceManager &SM = CGM.getContext().getSourceManager();
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PresumedLoc PLoc = SM.getPresumedLoc(Loc.isValid() ? Loc : CurLoc);
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return PLoc.getColumn();
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}
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llvm::StringRef CGDebugInfo::getCurrentDirname() {
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if (!CWDName.empty())
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return CWDName;
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char *CompDirnamePtr = NULL;
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llvm::sys::Path CWD = llvm::sys::Path::GetCurrentDirectory();
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CompDirnamePtr = DebugInfoNames.Allocate<char>(CWD.size());
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memcpy(CompDirnamePtr, CWD.c_str(), CWD.size());
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return CWDName = llvm::StringRef(CompDirnamePtr, CWD.size());
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}
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/// CreateCompileUnit - Create new compile unit.
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void CGDebugInfo::CreateCompileUnit() {
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// Get absolute path name.
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SourceManager &SM = CGM.getContext().getSourceManager();
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std::string MainFileName = CGM.getCodeGenOpts().MainFileName;
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if (MainFileName.empty())
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MainFileName = "<unknown>";
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// The main file name provided via the "-main-file-name" option contains just
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// the file name itself with no path information. This file name may have had
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// a relative path, so we look into the actual file entry for the main
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// file to determine the real absolute path for the file.
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std::string MainFileDir;
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if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
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MainFileDir = MainFile->getDir()->getName();
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if (MainFileDir != ".")
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MainFileName = MainFileDir + "/" + MainFileName;
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}
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// Save filename string.
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char *FilenamePtr = DebugInfoNames.Allocate<char>(MainFileName.length());
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memcpy(FilenamePtr, MainFileName.c_str(), MainFileName.length());
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llvm::StringRef Filename(FilenamePtr, MainFileName.length());
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unsigned LangTag;
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const LangOptions &LO = CGM.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 = getClangFullVersion();
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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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TheCU = DebugFactory.CreateCompileUnit(
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LangTag, Filename, getCurrentDirname(),
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Producer, true,
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LO.Optimize, CGM.getCodeGenOpts().DwarfDebugFlags, 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::DIFile Unit) {
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unsigned Encoding = 0;
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const char *BTName = NULL;
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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::ObjCClass:
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return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
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Unit, "objc_class", Unit, 0, 0, 0,
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0, llvm::DIDescriptor::FlagFwdDecl,
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llvm::DIType(), llvm::DIArray());
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case BuiltinType::ObjCId: {
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// typedef struct objc_class *Class;
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// typedef struct objc_object {
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// Class isa;
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// } *id;
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llvm::DIType OCTy =
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DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
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Unit, "objc_class", Unit, 0, 0, 0, 0,
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llvm::DIDescriptor::FlagFwdDecl,
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llvm::DIType(), llvm::DIArray());
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unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
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llvm::DIType ISATy =
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DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
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Unit, "", Unit,
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0, Size, 0, 0, 0, OCTy);
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llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
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llvm::DIType FieldTy =
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DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
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"isa", Unit,
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0,Size, 0, 0, 0, ISATy);
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EltTys.push_back(FieldTy);
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llvm::DIArray Elements =
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DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
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return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
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Unit, "objc_object", Unit, 0, 0, 0,
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0, 0,
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llvm::DIType(), Elements);
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}
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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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switch (BT->getKind()) {
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case BuiltinType::Long: BTName = "long int"; break;
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case BuiltinType::LongLong: BTName = "long long int"; break;
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case BuiltinType::ULong: BTName = "long unsigned int"; break;
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case BuiltinType::ULongLong: BTName = "long long unsigned int"; break;
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default:
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BTName = BT->getName(CGM.getContext().getLangOptions());
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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(TheCU, BTName, getOrCreateMainFile(),
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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::DIFile 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(TheCU, "complex", getOrCreateMainFile(),
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0, Size, Align, 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::DIFile 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, "", Unit,
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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::DIFile 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::DIFile 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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/// CreatePointeeType - Create PointTee type. If Pointee is a record
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/// then emit record's fwd if debug info size reduction is enabled.
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llvm::DIType CGDebugInfo::CreatePointeeType(QualType PointeeTy,
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llvm::DIFile Unit) {
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if (!CGM.getCodeGenOpts().LimitDebugInfo)
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return getOrCreateType(PointeeTy, Unit);
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if (const RecordType *RTy = dyn_cast<RecordType>(PointeeTy)) {
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RecordDecl *RD = RTy->getDecl();
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unsigned RTag;
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if (RD->isStruct())
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RTag = llvm::dwarf::DW_TAG_structure_type;
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else if (RD->isUnion())
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RTag = llvm::dwarf::DW_TAG_union_type;
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else {
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assert(RD->isClass() && "Unknown RecordType!");
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RTag = llvm::dwarf::DW_TAG_class_type;
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}
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llvm::DIFile DefUnit = getOrCreateFile(RD->getLocation());
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unsigned Line = getLineNumber(RD->getLocation());
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llvm::DIDescriptor FDContext =
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getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
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return
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DebugFactory.CreateCompositeType(RTag, FDContext, RD->getName(),
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DefUnit, Line, 0, 0, 0,
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llvm::DIType::FlagFwdDecl,
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llvm::DIType(), llvm::DIArray());
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}
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return getOrCreateType(PointeeTy, 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::DIFile 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.
|
|
uint64_t Size =
|
|
CGM.getContext().Target.getPointerWidth(PointeeTy.getAddressSpace());
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
return DebugFactory.CreateDerivedType(Tag, Unit, "", Unit,
|
|
0, Size, Align, 0, 0,
|
|
CreatePointeeType(PointeeTy, Unit));
|
|
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const BlockPointerType *Ty,
|
|
llvm::DIFile Unit) {
|
|
if (BlockLiteralGenericSet)
|
|
return BlockLiteralGeneric;
|
|
|
|
unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
|
|
|
|
llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
|
|
|
|
llvm::DIType FieldTy;
|
|
|
|
QualType FType;
|
|
uint64_t FieldSize, FieldOffset;
|
|
unsigned FieldAlign;
|
|
|
|
llvm::DIArray Elements;
|
|
llvm::DIType EltTy, DescTy;
|
|
|
|
FieldOffset = 0;
|
|
FType = CGM.getContext().UnsignedLongTy;
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "reserved", &FieldOffset));
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "Size", &FieldOffset));
|
|
|
|
Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
EltTys.clear();
|
|
|
|
unsigned Flags = llvm::DIDescriptor::FlagAppleBlock;
|
|
unsigned LineNo = getLineNumber(CurLoc);
|
|
|
|
EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_descriptor",
|
|
Unit, LineNo, FieldOffset, 0, 0,
|
|
Flags, llvm::DIType(), Elements);
|
|
|
|
// Bit size, align and offset of the type.
|
|
uint64_t Size = CGM.getContext().getTypeSize(Ty);
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
DescTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
|
|
Unit, "", Unit,
|
|
LineNo, Size, Align, 0, 0, EltTy);
|
|
|
|
FieldOffset = 0;
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
|
|
FType = CGM.getContext().IntTy;
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__reserved", &FieldOffset));
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__FuncPtr", &FieldOffset));
|
|
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
FieldTy = DescTy;
|
|
FieldSize = CGM.getContext().getTypeSize(Ty);
|
|
FieldAlign = CGM.getContext().getTypeAlign(Ty);
|
|
FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
|
|
"__descriptor", Unit,
|
|
LineNo, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
|
|
FieldOffset += FieldSize;
|
|
Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_literal_generic",
|
|
Unit, LineNo, FieldOffset, 0, 0,
|
|
Flags, llvm::DIType(), Elements);
|
|
|
|
BlockLiteralGenericSet = true;
|
|
BlockLiteralGeneric
|
|
= DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type, Unit,
|
|
"", Unit,
|
|
LineNo, Size, Align, 0, 0, EltTy);
|
|
return BlockLiteralGeneric;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const TypedefType *Ty,
|
|
llvm::DIFile Unit) {
|
|
// Typedefs are derived from some other type. If we have a typedef of a
|
|
// typedef, make sure to emit the whole chain.
|
|
llvm::DIType Src = getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit);
|
|
|
|
// We don't set size information, but do specify where the typedef was
|
|
// declared.
|
|
unsigned Line = getLineNumber(Ty->getDecl()->getLocation());
|
|
|
|
llvm::DIDescriptor TyContext
|
|
= getContextDescriptor(dyn_cast<Decl>(Ty->getDecl()->getDeclContext()),
|
|
Unit);
|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_typedef,
|
|
TyContext,
|
|
Ty->getDecl()->getName(), Unit,
|
|
Line, 0, 0, 0, 0, Src);
|
|
return DbgTy;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const FunctionType *Ty,
|
|
llvm::DIFile Unit) {
|
|
llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
|
|
|
|
// Add the result type at least.
|
|
EltTys.push_back(getOrCreateType(Ty->getResultType(), Unit));
|
|
|
|
// Set up remainder of arguments if there is a prototype.
|
|
// FIXME: IF NOT, HOW IS THIS REPRESENTED? llvm-gcc doesn't represent '...'!
|
|
if (isa<FunctionNoProtoType>(Ty))
|
|
EltTys.push_back(DebugFactory.CreateUnspecifiedParameter());
|
|
else if (const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Ty)) {
|
|
for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i)
|
|
EltTys.push_back(getOrCreateType(FTP->getArgType(i), Unit));
|
|
}
|
|
|
|
llvm::DIArray EltTypeArray =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
|
|
Unit, "", Unit,
|
|
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::DIFile Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys) {
|
|
unsigned FieldNo = 0;
|
|
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.
|
|
llvm::DIFile FieldDefUnit = getOrCreateFile(Field->getLocation());
|
|
unsigned FieldLine = getLineNumber(Field->getLocation());
|
|
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;
|
|
AccessSpecifier Access = I->getAccess();
|
|
if (Access == clang::AS_private)
|
|
Flags |= llvm::DIDescriptor::FlagPrivate;
|
|
else if (Access == clang::AS_protected)
|
|
Flags |= llvm::DIDescriptor::FlagProtected;
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
|
|
/// 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::DIFile Unit) {
|
|
llvm::DIType FnTy
|
|
= getOrCreateType(QualType(Method->getType()->getAs<FunctionProtoType>(),
|
|
0),
|
|
Unit);
|
|
|
|
// Add "this" pointer.
|
|
|
|
llvm::DIArray Args = llvm::DICompositeType(FnTy).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));
|
|
|
|
if (!Method->isStatic())
|
|
{
|
|
// "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;
|
|
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, "", Unit,
|
|
0, 0, 0, 0, 0,
|
|
llvm::DIType(), EltTypeArray);
|
|
}
|
|
|
|
/// isFunctionLocalClass - Return true if CXXRecordDecl is defined
|
|
/// inside a function.
|
|
static bool isFunctionLocalClass(const CXXRecordDecl *RD) {
|
|
if (const CXXRecordDecl *NRD =
|
|
dyn_cast<CXXRecordDecl>(RD->getDeclContext()))
|
|
return isFunctionLocalClass(NRD);
|
|
else if (isa<FunctionDecl>(RD->getDeclContext()))
|
|
return true;
|
|
return false;
|
|
|
|
}
|
|
/// CreateCXXMemberFunction - A helper function to create a DISubprogram for
|
|
/// a single member function GlobalDecl.
|
|
llvm::DISubprogram
|
|
CGDebugInfo::CreateCXXMemberFunction(const CXXMethodDecl *Method,
|
|
llvm::DIFile Unit,
|
|
llvm::DIType RecordTy) {
|
|
bool IsCtorOrDtor =
|
|
isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
|
|
|
|
llvm::StringRef MethodName = getFunctionName(Method);
|
|
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.
|
|
llvm::StringRef MethodLinkageName;
|
|
if (!IsCtorOrDtor && !isFunctionLocalClass(Method->getParent()))
|
|
MethodLinkageName = CGM.getMangledName(Method);
|
|
|
|
// Get the location for the method.
|
|
llvm::DIFile MethodDefUnit = getOrCreateFile(Method->getLocation());
|
|
unsigned MethodLine = getLineNumber(Method->getLocation());
|
|
|
|
// 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.getVTables().getMethodVTableIndex(Method);
|
|
ContainingType = RecordTy;
|
|
}
|
|
|
|
unsigned Flags = 0;
|
|
if (Method->isImplicit())
|
|
Flags |= llvm::DIDescriptor::FlagArtificial;
|
|
AccessSpecifier Access = Method->getAccess();
|
|
if (Access == clang::AS_private)
|
|
Flags |= llvm::DIDescriptor::FlagPrivate;
|
|
else if (Access == clang::AS_protected)
|
|
Flags |= llvm::DIDescriptor::FlagProtected;
|
|
if (const CXXConstructorDecl *CXXC = dyn_cast<CXXConstructorDecl>(Method)) {
|
|
if (CXXC->isExplicit())
|
|
Flags |= llvm::DIDescriptor::FlagExplicit;
|
|
} else if (const CXXConversionDecl *CXXC =
|
|
dyn_cast<CXXConversionDecl>(Method)) {
|
|
if (CXXC->isExplicit())
|
|
Flags |= llvm::DIDescriptor::FlagExplicit;
|
|
}
|
|
if (Method->hasPrototype())
|
|
Flags |= llvm::DIDescriptor::FlagPrototyped;
|
|
|
|
llvm::DISubprogram SP =
|
|
DebugFactory.CreateSubprogram(RecordTy , MethodName, MethodName,
|
|
MethodLinkageName,
|
|
MethodDefUnit, MethodLine,
|
|
MethodTy, /*isLocalToUnit=*/false,
|
|
/* isDefinition=*/ false,
|
|
Virtuality, VIndex, ContainingType,
|
|
Flags,
|
|
CGM.getLangOptions().Optimize);
|
|
|
|
// 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);
|
|
|
|
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::DIFile Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
|
|
llvm::DIType 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));
|
|
}
|
|
}
|
|
|
|
/// CollectCXXFriends - A helper function to collect debug info for
|
|
/// C++ base classes. This is used while creating debug info entry for
|
|
/// a Record.
|
|
void CGDebugInfo::
|
|
CollectCXXFriends(const CXXRecordDecl *RD, llvm::DIFile Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
|
|
llvm::DIType RecordTy) {
|
|
|
|
for (CXXRecordDecl::friend_iterator BI = RD->friend_begin(),
|
|
BE = RD->friend_end(); BI != BE; ++BI) {
|
|
|
|
TypeSourceInfo *TInfo = (*BI)->getFriendType();
|
|
if(TInfo)
|
|
{
|
|
llvm::DIType Ty = getOrCreateType(TInfo->getType(), Unit);
|
|
|
|
llvm::DIType DTy =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_friend,
|
|
RecordTy, llvm::StringRef(),
|
|
Unit, 0, 0, 0,
|
|
0, 0, Ty);
|
|
|
|
EltTys.push_back(DTy);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/// 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::DIFile Unit,
|
|
llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
|
|
llvm::DIType 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 offset is -ve. The code generator emits dwarf
|
|
// expression where it expects +ve number.
|
|
BaseOffset = 0 - CGM.getVTables().getVirtualBaseOffsetOffset(RD, Base);
|
|
BFlags = llvm::DIDescriptor::FlagVirtual;
|
|
} else
|
|
BaseOffset = RL.getBaseClassOffsetInBits(Base);
|
|
|
|
AccessSpecifier Access = BI->getAccessSpecifier();
|
|
if (Access == clang::AS_private)
|
|
BFlags |= llvm::DIDescriptor::FlagPrivate;
|
|
else if (Access == clang::AS_protected)
|
|
BFlags |= llvm::DIDescriptor::FlagProtected;
|
|
|
|
llvm::DIType DTy =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_inheritance,
|
|
RecordTy, llvm::StringRef(),
|
|
Unit, 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::DIFile Unit) {
|
|
if (VTablePtrType.isValid())
|
|
return VTablePtrType;
|
|
|
|
ASTContext &Context = CGM.getContext();
|
|
|
|
/* Function type */
|
|
llvm::DIDescriptor STy = getOrCreateType(Context.IntTy, Unit);
|
|
llvm::DIArray SElements = DebugFactory.GetOrCreateArray(&STy, 1);
|
|
llvm::DIType SubTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
|
|
Unit, "", Unit,
|
|
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", Unit,
|
|
0, Size, 0, 0, 0, SubTy);
|
|
|
|
VTablePtrType =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
|
|
Unit, "", Unit,
|
|
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::DIFile 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), Unit,
|
|
0, Size, 0, 0, 0,
|
|
getOrCreateVTablePtrType(Unit));
|
|
EltTys.push_back(VPTR);
|
|
}
|
|
|
|
/// getOrCreateRecordType - Emit record type's standalone debug info.
|
|
llvm::DIType CGDebugInfo::getOrCreateRecordType(QualType RTy,
|
|
SourceLocation Loc) {
|
|
llvm::DIType T = getOrCreateType(RTy, getOrCreateFile(Loc));
|
|
DebugFactory.RecordType(T);
|
|
return T;
|
|
}
|
|
|
|
/// CreateType - get structure or union type.
|
|
llvm::DIType CGDebugInfo::CreateType(const RecordType *Ty,
|
|
llvm::DIFile 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;
|
|
}
|
|
|
|
// Get overall information about the record type for the debug info.
|
|
llvm::DIFile DefUnit = getOrCreateFile(RD->getLocation());
|
|
unsigned Line = getLineNumber(RD->getLocation());
|
|
|
|
// 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.
|
|
llvm::DIDescriptor FDContext =
|
|
getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
|
|
|
|
// If this is just a forward declaration, construct an appropriately
|
|
// marked node and just return it.
|
|
if (!RD->getDefinition()) {
|
|
llvm::DICompositeType FwdDecl =
|
|
DebugFactory.CreateCompositeType(Tag, FDContext, RD->getName(),
|
|
DefUnit, Line, 0, 0, 0,
|
|
llvm::DIDescriptor::FlagFwdDecl,
|
|
llvm::DIType(), llvm::DIArray());
|
|
|
|
return FwdDecl;
|
|
}
|
|
|
|
llvm::DIType FwdDecl = DebugFactory.CreateTemporaryType();
|
|
|
|
llvm::MDNode *MN = FwdDecl;
|
|
llvm::TrackingVH<llvm::MDNode> FwdDeclNode = MN;
|
|
// Otherwise, insert it into the TypeCache so that recursive uses will find
|
|
// it.
|
|
TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl;
|
|
// Push the struct on region stack.
|
|
RegionStack.push_back(FwdDeclNode);
|
|
RegionMap[Ty->getDecl()] = llvm::WeakVH(FwdDecl);
|
|
|
|
// 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);
|
|
}
|
|
|
|
// Collect static variables with initializers.
|
|
for (RecordDecl::decl_iterator I = RD->decls_begin(), E = RD->decls_end();
|
|
I != E; ++I)
|
|
if (const VarDecl *V = dyn_cast<VarDecl>(*I)) {
|
|
if (const Expr *Init = V->getInit()) {
|
|
Expr::EvalResult Result;
|
|
if (Init->Evaluate(Result, CGM.getContext()) && Result.Val.isInt()) {
|
|
llvm::ConstantInt *CI
|
|
= llvm::ConstantInt::get(CGM.getLLVMContext(), Result.Val.getInt());
|
|
|
|
// Create the descriptor for static variable.
|
|
llvm::DIFile VUnit = getOrCreateFile(V->getLocation());
|
|
llvm::StringRef VName = V->getName();
|
|
llvm::DIType VTy = getOrCreateType(V->getType(), VUnit);
|
|
// Do not use DIGlobalVariable for enums.
|
|
if (VTy.getTag() != llvm::dwarf::DW_TAG_enumeration_type) {
|
|
DebugFactory.CreateGlobalVariable(FwdDecl, VName, VName, VName, VUnit,
|
|
getLineNumber(V->getLocation()),
|
|
VTy, true, true, CI);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
CollectRecordFields(RD, Unit, EltTys);
|
|
llvm::MDNode *ContainingType = NULL;
|
|
if (CXXDecl) {
|
|
CollectCXXMemberFunctions(CXXDecl, Unit, EltTys, FwdDecl);
|
|
CollectCXXFriends(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()) {
|
|
// Seek non virtual primary base root.
|
|
while (1) {
|
|
const ASTRecordLayout &BRL = CGM.getContext().getASTRecordLayout(PBase);
|
|
const CXXRecordDecl *PBT = BRL.getPrimaryBase();
|
|
if (PBT && !BRL.getPrimaryBaseWasVirtual())
|
|
PBase = PBT;
|
|
else
|
|
break;
|
|
}
|
|
ContainingType =
|
|
getOrCreateType(QualType(PBase->getTypeForDecl(), 0), Unit);
|
|
}
|
|
else if (CXXDecl->isDynamicClass())
|
|
ContainingType = FwdDecl;
|
|
}
|
|
|
|
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);
|
|
|
|
RegionStack.pop_back();
|
|
llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator RI =
|
|
RegionMap.find(Ty->getDecl());
|
|
if (RI != RegionMap.end())
|
|
RegionMap.erase(RI);
|
|
|
|
llvm::DIDescriptor RDContext =
|
|
getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
|
|
|
|
llvm::StringRef RDName = RD->getName();
|
|
// If this is a class, include the template arguments also.
|
|
if (Tag == llvm::dwarf::DW_TAG_class_type)
|
|
RDName = getClassName(RD);
|
|
|
|
llvm::DICompositeType RealDecl =
|
|
DebugFactory.CreateCompositeType(Tag, RDContext,
|
|
RDName,
|
|
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::DIType(FwdDeclNode).replaceAllUsesWith(RealDecl);
|
|
RegionMap[RD] = llvm::WeakVH(RealDecl);
|
|
return RealDecl;
|
|
}
|
|
|
|
/// CreateType - get objective-c object type.
|
|
llvm::DIType CGDebugInfo::CreateType(const ObjCObjectType *Ty,
|
|
llvm::DIFile Unit) {
|
|
// Ignore protocols.
|
|
return getOrCreateType(Ty->getBaseType(), Unit);
|
|
}
|
|
|
|
/// CreateType - get objective-c interface type.
|
|
llvm::DIType CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
|
|
llvm::DIFile Unit) {
|
|
ObjCInterfaceDecl *ID = Ty->getDecl();
|
|
unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
|
|
|
|
// Get overall information about the record type for the debug info.
|
|
llvm::DIFile DefUnit = getOrCreateFile(ID->getLocation());
|
|
unsigned Line = getLineNumber(ID->getLocation());
|
|
unsigned RuntimeLang = TheCU.getLanguage();
|
|
|
|
// If this is just a forward declaration, return a special forward-declaration
|
|
// debug type.
|
|
if (ID->isForwardDecl()) {
|
|
llvm::DICompositeType FwdDecl =
|
|
DebugFactory.CreateCompositeType(Tag, Unit, ID->getName(),
|
|
DefUnit, Line, 0, 0, 0, 0,
|
|
llvm::DIType(), llvm::DIArray(),
|
|
RuntimeLang);
|
|
return FwdDecl;
|
|
}
|
|
|
|
// 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.CreateTemporaryType();
|
|
|
|
llvm::MDNode *MN = FwdDecl;
|
|
llvm::TrackingVH<llvm::MDNode> FwdDeclNode = MN;
|
|
// Otherwise, insert it into the TypeCache so that recursive uses will find
|
|
// it.
|
|
TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl;
|
|
// Push the struct on region stack.
|
|
RegionStack.push_back(FwdDeclNode);
|
|
RegionMap[Ty->getDecl()] = llvm::WeakVH(FwdDecl);
|
|
|
|
// 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, "", Unit, 0, 0, 0,
|
|
0 /* offset */, 0, SClassTy);
|
|
EltTys.push_back(InhTag);
|
|
}
|
|
|
|
const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
|
|
|
|
unsigned FieldNo = 0;
|
|
for (ObjCIvarDecl *Field = ID->all_declared_ivar_begin(); Field;
|
|
Field = Field->getNextIvar(), ++FieldNo) {
|
|
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.
|
|
llvm::DIFile FieldDefUnit = getOrCreateFile(Field->getLocation());
|
|
unsigned FieldLine = getLineNumber(Field->getLocation());
|
|
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::DIDescriptor::FlagProtected;
|
|
else if (Field->getAccessControl() == ObjCIvarDecl::Private)
|
|
Flags = llvm::DIDescriptor::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());
|
|
|
|
RegionStack.pop_back();
|
|
llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator RI =
|
|
RegionMap.find(Ty->getDecl());
|
|
if (RI != RegionMap.end())
|
|
RegionMap.erase(RI);
|
|
|
|
// 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::DIType(FwdDeclNode).replaceAllUsesWith(RealDecl);
|
|
RegionMap[ID] = llvm::WeakVH(RealDecl);
|
|
|
|
return RealDecl;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const EnumType *Ty,
|
|
llvm::DIFile Unit) {
|
|
return CreateEnumType(Ty->getDecl(), Unit);
|
|
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const TagType *Ty,
|
|
llvm::DIFile 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::DIFile Unit) {
|
|
llvm::DIType ElementTy = getOrCreateType(Ty->getElementType(), Unit);
|
|
uint64_t NumElems = Ty->getNumElements();
|
|
if (NumElems > 0)
|
|
--NumElems;
|
|
|
|
llvm::DIDescriptor Subscript = DebugFactory.GetOrCreateSubrange(0, NumElems);
|
|
llvm::DIArray SubscriptArray = DebugFactory.GetOrCreateArray(&Subscript, 1);
|
|
|
|
uint64_t Size = CGM.getContext().getTypeSize(Ty);
|
|
uint64_t Align = CGM.getContext().getTypeAlign(Ty);
|
|
|
|
return
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_vector_type,
|
|
Unit, "", Unit,
|
|
0, Size, Align, 0, 0,
|
|
ElementTy, SubscriptArray);
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const ArrayType *Ty,
|
|
llvm::DIFile 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);
|
|
if (Ty->isIncompleteArrayType())
|
|
EltTy = Ty->getElementType();
|
|
else {
|
|
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, "", Unit,
|
|
0, Size, Align, 0, 0,
|
|
getOrCreateType(EltTy, Unit),
|
|
SubscriptArray);
|
|
return DbgTy;
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const LValueReferenceType *Ty,
|
|
llvm::DIFile Unit) {
|
|
return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type,
|
|
Ty, Ty->getPointeeType(), Unit);
|
|
}
|
|
|
|
llvm::DIType CGDebugInfo::CreateType(const MemberPointerType *Ty,
|
|
llvm::DIFile 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", U, 0,
|
|
Info.first, Info.second, FieldOffset, 0,
|
|
PointerDiffDITy);
|
|
FieldOffset += Info.first;
|
|
|
|
ElementTypes[1] =
|
|
DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, U,
|
|
"ptr", U, 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"),
|
|
U, 0, FieldOffset,
|
|
0, 0, 0, llvm::DIType(), Elements);
|
|
}
|
|
|
|
/// CreateEnumType - get enumeration type.
|
|
llvm::DIType CGDebugInfo::CreateEnumType(const EnumDecl *ED, llvm::DIFile Unit){
|
|
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());
|
|
|
|
llvm::DIFile DefUnit = getOrCreateFile(ED->getLocation());
|
|
unsigned Line = getLineNumber(ED->getLocation());
|
|
uint64_t Size = 0;
|
|
uint64_t Align = 0;
|
|
if (!ED->getTypeForDecl()->isIncompleteType()) {
|
|
Size = CGM.getContext().getTypeSize(ED->getTypeForDecl());
|
|
Align = CGM.getContext().getTypeAlign(ED->getTypeForDecl());
|
|
}
|
|
llvm::DIDescriptor EnumContext =
|
|
getContextDescriptor(dyn_cast<Decl>(ED->getDeclContext()), Unit);
|
|
llvm::DIType DbgTy =
|
|
DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_enumeration_type,
|
|
EnumContext, ED->getName(),
|
|
DefUnit, Line, Size, Align, 0, 0,
|
|
llvm::DIType(), EltArray);
|
|
return DbgTy;
|
|
}
|
|
|
|
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::Elaborated:
|
|
T = cast<ElaboratedType>(T)->getNamedType();
|
|
break;
|
|
case Type::SubstTemplateTypeParm:
|
|
T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
|
|
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::DIFile Unit) {
|
|
if (Ty.isNull())
|
|
return llvm::DIType();
|
|
|
|
// Unwrap the type as needed for debug information.
|
|
Ty = UnwrapTypeForDebugInfo(Ty);
|
|
|
|
// Check for existing entry.
|
|
llvm::DenseMap<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;
|
|
return Res;
|
|
}
|
|
|
|
/// CreateTypeNode - Create a new debug type node.
|
|
llvm::DIType CGDebugInfo::CreateTypeNode(QualType Ty,
|
|
llvm::DIFile 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::ObjCObject:
|
|
return CreateType(cast<ObjCObjectType>(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::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();
|
|
}
|
|
|
|
/// CreateMemberType - Create new member and increase Offset by FType's size.
|
|
llvm::DIType CGDebugInfo::CreateMemberType(llvm::DIFile Unit, QualType FType,
|
|
llvm::StringRef Name,
|
|
uint64_t *Offset) {
|
|
llvm::DIType FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
|
|
uint64_t FieldSize = CGM.getContext().getTypeSize(FType);
|
|
unsigned FieldAlign = CGM.getContext().getTypeAlign(FType);
|
|
llvm::DIType Ty = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member,
|
|
Unit, Name, Unit, 0,
|
|
FieldSize, FieldAlign,
|
|
*Offset, 0, FieldTy);
|
|
*Offset += FieldSize;
|
|
return Ty;
|
|
}
|
|
|
|
/// 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;
|
|
|
|
FnBeginRegionCount.push_back(RegionStack.size());
|
|
|
|
const Decl *D = GD.getDecl();
|
|
unsigned Flags = 0;
|
|
llvm::DIFile Unit = getOrCreateFile(CurLoc);
|
|
llvm::DIDescriptor FDContext(Unit);
|
|
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::DIDescriptor SP(dyn_cast_or_null<llvm::MDNode>(&*FI->second));
|
|
if (SP.isSubprogram() && llvm::DISubprogram(SP).isDefinition()) {
|
|
llvm::MDNode *SPN = SP;
|
|
RegionStack.push_back(SPN);
|
|
RegionMap[D] = llvm::WeakVH(SP);
|
|
return;
|
|
}
|
|
}
|
|
Name = getFunctionName(FD);
|
|
// Use mangled name as linkage name for c/c++ functions.
|
|
LinkageName = CGM.getMangledName(GD);
|
|
if (LinkageName == Name)
|
|
LinkageName = llvm::StringRef();
|
|
if (FD->hasPrototype())
|
|
Flags |= llvm::DIDescriptor::FlagPrototyped;
|
|
if (const NamespaceDecl *NSDecl =
|
|
dyn_cast_or_null<NamespaceDecl>(FD->getDeclContext()))
|
|
FDContext = getOrCreateNameSpace(NSDecl, Unit);
|
|
} else if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D)) {
|
|
Name = getObjCMethodName(OMD);
|
|
Flags |= llvm::DIDescriptor::FlagPrototyped;
|
|
} else {
|
|
// Use llvm function name.
|
|
Name = Fn->getName();
|
|
Flags |= llvm::DIDescriptor::FlagPrototyped;
|
|
}
|
|
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.
|
|
unsigned LineNo = getLineNumber(CurLoc);
|
|
if (D->isImplicit())
|
|
Flags |= llvm::DIDescriptor::FlagArtificial;
|
|
llvm::DISubprogram SP =
|
|
DebugFactory.CreateSubprogram(FDContext, Name, Name, LinkageName, Unit,
|
|
LineNo, getOrCreateType(FnType, Unit),
|
|
Fn->hasInternalLinkage(), true/*definition*/,
|
|
0, 0, llvm::DIType(),
|
|
Flags,
|
|
CGM.getLangOptions().Optimize, Fn);
|
|
|
|
// Push function on region stack.
|
|
llvm::MDNode *SPN = SP;
|
|
RegionStack.push_back(SPN);
|
|
RegionMap[D] = llvm::WeakVH(SP);
|
|
|
|
// Clear stack used to keep track of #line directives.
|
|
LineDirectiveFiles.clear();
|
|
}
|
|
|
|
|
|
void CGDebugInfo::EmitStopPoint(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)))
|
|
// New Builder may not be in sync with CGDebugInfo.
|
|
if (!Builder.getCurrentDebugLocation().isUnknown())
|
|
return;
|
|
|
|
// Update last state.
|
|
PrevLoc = CurLoc;
|
|
|
|
llvm::MDNode *Scope = RegionStack.back();
|
|
Builder.SetCurrentDebugLocation(llvm::DebugLoc::get(getLineNumber(CurLoc),
|
|
getColumnNumber(CurLoc),
|
|
Scope));
|
|
}
|
|
|
|
/// UpdateLineDirectiveRegion - Update region stack only if #line directive
|
|
/// has introduced scope change.
|
|
void CGDebugInfo::UpdateLineDirectiveRegion(CGBuilderTy &Builder) {
|
|
if (CurLoc.isInvalid() || CurLoc.isMacroID() ||
|
|
PrevLoc.isInvalid() || PrevLoc.isMacroID())
|
|
return;
|
|
SourceManager &SM = CGM.getContext().getSourceManager();
|
|
PresumedLoc PCLoc = SM.getPresumedLoc(CurLoc);
|
|
PresumedLoc PPLoc = SM.getPresumedLoc(PrevLoc);
|
|
|
|
if (!strcmp(PPLoc.getFilename(), PCLoc.getFilename()))
|
|
return;
|
|
|
|
// If #line directive stack is empty then we are entering a new scope.
|
|
if (LineDirectiveFiles.empty()) {
|
|
EmitRegionStart(Builder);
|
|
LineDirectiveFiles.push_back(PCLoc.getFilename());
|
|
return;
|
|
}
|
|
|
|
assert (RegionStack.size() >= LineDirectiveFiles.size()
|
|
&& "error handling #line regions!");
|
|
|
|
bool SeenThisFile = false;
|
|
// Chek if current file is already seen earlier.
|
|
for(std::vector<const char *>::iterator I = LineDirectiveFiles.begin(),
|
|
E = LineDirectiveFiles.end(); I != E; ++I)
|
|
if (!strcmp(PCLoc.getFilename(), *I)) {
|
|
SeenThisFile = true;
|
|
break;
|
|
}
|
|
|
|
// If #line for this file is seen earlier then pop out #line regions.
|
|
if (SeenThisFile) {
|
|
while (!LineDirectiveFiles.empty()) {
|
|
const char *LastFile = LineDirectiveFiles.back();
|
|
RegionStack.pop_back();
|
|
LineDirectiveFiles.pop_back();
|
|
if (!strcmp(PPLoc.getFilename(), LastFile))
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
|
|
// .. otherwise insert new #line region.
|
|
EmitRegionStart(Builder);
|
|
LineDirectiveFiles.push_back(PCLoc.getFilename());
|
|
|
|
return;
|
|
}
|
|
/// EmitRegionStart- Constructs the debug code for entering a declarative
|
|
/// region - "llvm.dbg.region.start.".
|
|
void CGDebugInfo::EmitRegionStart(CGBuilderTy &Builder) {
|
|
llvm::DIDescriptor D =
|
|
DebugFactory.CreateLexicalBlock(RegionStack.empty() ?
|
|
llvm::DIDescriptor() :
|
|
llvm::DIDescriptor(RegionStack.back()),
|
|
getOrCreateFile(CurLoc),
|
|
getLineNumber(CurLoc),
|
|
getColumnNumber(CurLoc));
|
|
llvm::MDNode *DN = D;
|
|
RegionStack.push_back(DN);
|
|
}
|
|
|
|
/// EmitRegionEnd - Constructs the debug code for exiting a declarative
|
|
/// region - "llvm.dbg.region.end."
|
|
void CGDebugInfo::EmitRegionEnd(CGBuilderTy &Builder) {
|
|
assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
|
|
|
|
// Provide an region stop point.
|
|
EmitStopPoint(Builder);
|
|
|
|
RegionStack.pop_back();
|
|
}
|
|
|
|
/// EmitFunctionEnd - Constructs the debug code for exiting a function.
|
|
void CGDebugInfo::EmitFunctionEnd(CGBuilderTy &Builder) {
|
|
assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
|
|
unsigned RCount = FnBeginRegionCount.back();
|
|
assert(RCount <= RegionStack.size() && "Region stack mismatch");
|
|
|
|
// Pop all regions for this function.
|
|
while (RegionStack.size() != RCount)
|
|
EmitRegionEnd(Builder);
|
|
FnBeginRegionCount.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::DIFile Unit = getOrCreateFile(VD->getLocation());
|
|
QualType Type = VD->getType();
|
|
|
|
FieldOffset = 0;
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__isa", &FieldOffset));
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__forwarding", &FieldOffset));
|
|
FType = CGM.getContext().IntTy;
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__flags", &FieldOffset));
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__size", &FieldOffset));
|
|
|
|
bool HasCopyAndDispose = CGM.BlockRequiresCopying(Type);
|
|
if (HasCopyAndDispose) {
|
|
FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__copy_helper",
|
|
&FieldOffset));
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "__destroy_helper",
|
|
&FieldOffset));
|
|
}
|
|
|
|
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);
|
|
EltTys.push_back(CreateMemberType(Unit, FType, "", &FieldOffset));
|
|
}
|
|
}
|
|
|
|
FType = Type;
|
|
llvm::DIType 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(), Unit,
|
|
0, FieldSize, FieldAlign,
|
|
FieldOffset, 0, FieldTy);
|
|
EltTys.push_back(FieldTy);
|
|
FieldOffset += FieldSize;
|
|
|
|
llvm::DIArray Elements =
|
|
DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
|
|
|
|
unsigned Flags = llvm::DIDescriptor::FlagBlockByrefStruct;
|
|
|
|
return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type,
|
|
Unit, "", Unit,
|
|
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!");
|
|
|
|
llvm::DIFile Unit = getOrCreateFile(VD->getLocation());
|
|
llvm::DIType Ty;
|
|
uint64_t XOffset = 0;
|
|
if (VD->hasAttr<BlocksAttr>())
|
|
Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
|
|
else
|
|
Ty = getOrCreateType(VD->getType(), Unit);
|
|
|
|
// If there is not any debug info for type then do not emit debug info
|
|
// for this variable.
|
|
if (!Ty)
|
|
return;
|
|
|
|
// Get location information.
|
|
unsigned Line = getLineNumber(VD->getLocation());
|
|
unsigned Column = getColumnNumber(VD->getLocation());
|
|
unsigned Flags = 0;
|
|
if (VD->isImplicit())
|
|
Flags |= llvm::DIDescriptor::FlagArtificial;
|
|
llvm::MDNode *Scope = RegionStack.back();
|
|
|
|
llvm::StringRef Name = VD->getName();
|
|
if (!Name.empty()) {
|
|
// Create the descriptor for the variable.
|
|
llvm::DIVariable D =
|
|
DebugFactory.CreateVariable(Tag, llvm::DIDescriptor(Scope),
|
|
Name, Unit, Line, Ty,
|
|
CGM.getLangOptions().Optimize, Flags);
|
|
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
llvm::Instruction *Call =
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
|
|
Call->setDebugLoc(llvm::DebugLoc::get(Line, Column, Scope));
|
|
return;
|
|
}
|
|
|
|
// If VD is an anonymous union then Storage represents value for
|
|
// all union fields.
|
|
if (const RecordType *RT = dyn_cast<RecordType>(VD->getType()))
|
|
if (const RecordDecl *RD = dyn_cast<RecordDecl>(RT->getDecl()))
|
|
if (RD->isUnion()) {
|
|
for (RecordDecl::field_iterator I = RD->field_begin(),
|
|
E = RD->field_end();
|
|
I != E; ++I) {
|
|
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;
|
|
|
|
// Use VarDecl's Tag, Scope and Line number.
|
|
llvm::DIVariable D =
|
|
DebugFactory.CreateVariable(Tag, llvm::DIDescriptor(Scope),
|
|
FieldName, Unit, Line, FieldTy,
|
|
CGM.getLangOptions().Optimize, Flags);
|
|
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
llvm::Instruction *Call =
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
|
|
Call->setDebugLoc(llvm::DebugLoc::get(Line, Column, Scope));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// 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!");
|
|
|
|
if (Builder.GetInsertBlock() == 0)
|
|
return;
|
|
|
|
uint64_t XOffset = 0;
|
|
llvm::DIFile Unit = getOrCreateFile(VD->getLocation());
|
|
llvm::DIType Ty;
|
|
if (VD->hasAttr<BlocksAttr>())
|
|
Ty = EmitTypeForVarWithBlocksAttr(VD, &XOffset);
|
|
else
|
|
Ty = getOrCreateType(VD->getType(), Unit);
|
|
|
|
// Get location information.
|
|
unsigned Line = getLineNumber(VD->getLocation());
|
|
unsigned Column = getColumnNumber(VD->getLocation());
|
|
|
|
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.data(), addr.size());
|
|
// Insert an llvm.dbg.declare into the current block.
|
|
llvm::Instruction *Call =
|
|
DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
|
|
|
|
llvm::MDNode *Scope = RegionStack.back();
|
|
Call->setDebugLoc(llvm::DebugLoc::get(Line, Column, Scope));
|
|
}
|
|
|
|
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::DIFile Unit = getOrCreateFile(D->getLocation());
|
|
unsigned LineNo = getLineNumber(D->getLocation());
|
|
|
|
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 = D->getName();
|
|
llvm::StringRef LinkageName;
|
|
if (D->getDeclContext() && !isa<FunctionDecl>(D->getDeclContext()))
|
|
LinkageName = Var->getName();
|
|
if (LinkageName == DeclName)
|
|
LinkageName = llvm::StringRef();
|
|
llvm::DIDescriptor DContext =
|
|
getContextDescriptor(dyn_cast<Decl>(D->getDeclContext()), Unit);
|
|
DebugFactory.CreateGlobalVariable(DContext, DeclName, DeclName, LinkageName,
|
|
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::DIFile Unit = getOrCreateFile(ID->getLocation());
|
|
unsigned LineNo = getLineNumber(ID->getLocation());
|
|
|
|
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);
|
|
}
|
|
|
|
/// EmitGlobalVariable - Emit global variable's debug info.
|
|
void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD,
|
|
llvm::Constant *Init) {
|
|
// Create the descriptor for the variable.
|
|
llvm::DIFile Unit = getOrCreateFile(VD->getLocation());
|
|
llvm::StringRef Name = VD->getName();
|
|
llvm::DIType Ty = getOrCreateType(VD->getType(), Unit);
|
|
if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(VD)) {
|
|
if (const EnumDecl *ED = dyn_cast<EnumDecl>(ECD->getDeclContext()))
|
|
Ty = CreateEnumType(ED, Unit);
|
|
}
|
|
// Do not use DIGlobalVariable for enums.
|
|
if (Ty.getTag() == llvm::dwarf::DW_TAG_enumeration_type)
|
|
return;
|
|
DebugFactory.CreateGlobalVariable(Unit, Name, Name, Name, Unit,
|
|
getLineNumber(VD->getLocation()),
|
|
Ty, true, true, Init);
|
|
}
|
|
|
|
/// 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));
|
|
|
|
unsigned LineNo = getLineNumber(NSDecl->getLocation());
|
|
llvm::DIFile FileD = getOrCreateFile(NSDecl->getLocation());
|
|
llvm::DIDescriptor Context =
|
|
getContextDescriptor(dyn_cast<Decl>(NSDecl->getDeclContext()), Unit);
|
|
llvm::DINameSpace NS =
|
|
DebugFactory.CreateNameSpace(Context, NSDecl->getName(), FileD, LineNo);
|
|
NameSpaceCache[NSDecl] = llvm::WeakVH(NS);
|
|
return NS;
|
|
}
|