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334 lines
10 KiB
C++
334 lines
10 KiB
C++
//===- RecordName.cpp ----------------------------------------- *- C++ --*-===//
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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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#include "llvm/DebugInfo/CodeView/RecordName.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/DebugInfo/CodeView/CVSymbolVisitor.h"
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#include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecordMapping.h"
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#include "llvm/DebugInfo/CodeView/TypeVisitorCallbacks.h"
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#include "llvm/Support/FormatVariadic.h"
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using namespace llvm;
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using namespace llvm::codeview;
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namespace {
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class TypeNameComputer : public TypeVisitorCallbacks {
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/// The type collection. Used to calculate names of nested types.
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TypeCollection &Types;
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TypeIndex CurrentTypeIndex = TypeIndex::None();
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/// Name of the current type. Only valid before visitTypeEnd.
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SmallString<256> Name;
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public:
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explicit TypeNameComputer(TypeCollection &Types) : Types(Types) {}
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StringRef name() const { return Name; }
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/// Paired begin/end actions for all types. Receives all record data,
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/// including the fixed-length record prefix.
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Error visitTypeBegin(CVType &Record) override;
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Error visitTypeBegin(CVType &Record, TypeIndex Index) override;
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Error visitTypeEnd(CVType &Record) override;
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#define TYPE_RECORD(EnumName, EnumVal, Name) \
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Error visitKnownRecord(CVType &CVR, Name##Record &Record) override;
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#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
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#define MEMBER_RECORD(EnumName, EnumVal, Name)
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#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
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};
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} // namespace
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Error TypeNameComputer::visitTypeBegin(CVType &Record) {
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llvm_unreachable("Must call visitTypeBegin with a TypeIndex!");
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return Error::success();
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}
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Error TypeNameComputer::visitTypeBegin(CVType &Record, TypeIndex Index) {
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// Reset Name to the empty string. If the visitor sets it, we know it.
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Name = "";
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CurrentTypeIndex = Index;
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return Error::success();
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}
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Error TypeNameComputer::visitTypeEnd(CVType &CVR) { return Error::success(); }
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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FieldListRecord &FieldList) {
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Name = "<field list>";
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVRecord<TypeLeafKind> &CVR,
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StringIdRecord &String) {
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Name = String.getString();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, ArgListRecord &Args) {
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auto Indices = Args.getIndices();
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uint32_t Size = Indices.size();
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Name = "(";
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for (uint32_t I = 0; I < Size; ++I) {
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assert(Indices[I] < CurrentTypeIndex);
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Name.append(Types.getTypeName(Indices[I]));
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if (I + 1 != Size)
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Name.append(", ");
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}
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Name.push_back(')');
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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StringListRecord &Strings) {
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auto Indices = Strings.getIndices();
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uint32_t Size = Indices.size();
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Name = "\"";
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for (uint32_t I = 0; I < Size; ++I) {
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Name.append(Types.getTypeName(Indices[I]));
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if (I + 1 != Size)
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Name.append("\" \"");
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}
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Name.push_back('\"');
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, ClassRecord &Class) {
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Name = Class.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, UnionRecord &Union) {
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Name = Union.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, EnumRecord &Enum) {
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Name = Enum.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, ArrayRecord &AT) {
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Name = AT.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, VFTableRecord &VFT) {
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Name = VFT.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, MemberFuncIdRecord &Id) {
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Name = Id.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, ProcedureRecord &Proc) {
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StringRef Ret = Types.getTypeName(Proc.getReturnType());
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StringRef Params = Types.getTypeName(Proc.getArgumentList());
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Name = formatv("{0} {1}", Ret, Params).sstr<256>();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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MemberFunctionRecord &MF) {
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StringRef Ret = Types.getTypeName(MF.getReturnType());
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StringRef Class = Types.getTypeName(MF.getClassType());
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StringRef Params = Types.getTypeName(MF.getArgumentList());
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Name = formatv("{0} {1}::{2}", Ret, Class, Params).sstr<256>();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, FuncIdRecord &Func) {
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Name = Func.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, TypeServer2Record &TS) {
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Name = TS.getName();
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, PointerRecord &Ptr) {
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if (Ptr.isPointerToMember()) {
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const MemberPointerInfo &MI = Ptr.getMemberInfo();
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StringRef Pointee = Types.getTypeName(Ptr.getReferentType());
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StringRef Class = Types.getTypeName(MI.getContainingType());
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Name = formatv("{0} {1}::*", Pointee, Class);
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} else {
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Name.append(Types.getTypeName(Ptr.getReferentType()));
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if (Ptr.getMode() == PointerMode::LValueReference)
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Name.append("&");
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else if (Ptr.getMode() == PointerMode::RValueReference)
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Name.append("&&");
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else if (Ptr.getMode() == PointerMode::Pointer)
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Name.append("*");
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// Qualifiers in pointer records apply to the pointer, not the pointee, so
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// they go on the right.
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if (Ptr.isConst())
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Name.append(" const");
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if (Ptr.isVolatile())
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Name.append(" volatile");
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if (Ptr.isUnaligned())
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Name.append(" __unaligned");
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if (Ptr.isRestrict())
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Name.append(" __restrict");
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}
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, ModifierRecord &Mod) {
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uint16_t Mods = static_cast<uint16_t>(Mod.getModifiers());
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if (Mods & uint16_t(ModifierOptions::Const))
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Name.append("const ");
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if (Mods & uint16_t(ModifierOptions::Volatile))
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Name.append("volatile ");
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if (Mods & uint16_t(ModifierOptions::Unaligned))
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Name.append("__unaligned ");
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Name.append(Types.getTypeName(Mod.getModifiedType()));
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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VFTableShapeRecord &Shape) {
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Name = formatv("<vftable {0} methods>", Shape.getEntryCount());
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(
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CVType &CVR, UdtModSourceLineRecord &ModSourceLine) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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UdtSourceLineRecord &SourceLine) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, BitFieldRecord &BF) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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MethodOverloadListRecord &Overloads) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, BuildInfoRecord &BI) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR, LabelRecord &R) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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PrecompRecord &Precomp) {
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return Error::success();
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}
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Error TypeNameComputer::visitKnownRecord(CVType &CVR,
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EndPrecompRecord &EndPrecomp) {
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return Error::success();
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}
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std::string llvm::codeview::computeTypeName(TypeCollection &Types,
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TypeIndex Index) {
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TypeNameComputer Computer(Types);
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CVType Record = Types.getType(Index);
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if (auto EC = visitTypeRecord(Record, Index, Computer)) {
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consumeError(std::move(EC));
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return "<unknown UDT>";
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}
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return Computer.name();
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}
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static int getSymbolNameOffset(CVSymbol Sym) {
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switch (Sym.kind()) {
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// See ProcSym
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case SymbolKind::S_GPROC32:
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case SymbolKind::S_LPROC32:
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case SymbolKind::S_GPROC32_ID:
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case SymbolKind::S_LPROC32_ID:
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case SymbolKind::S_LPROC32_DPC:
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case SymbolKind::S_LPROC32_DPC_ID:
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return 35;
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// See Thunk32Sym
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case SymbolKind::S_THUNK32:
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return 21;
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// See SectionSym
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case SymbolKind::S_SECTION:
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return 16;
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// See CoffGroupSym
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case SymbolKind::S_COFFGROUP:
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return 14;
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// See PublicSym32, FileStaticSym, RegRelativeSym, DataSym, ThreadLocalDataSym
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case SymbolKind::S_PUB32:
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case SymbolKind::S_FILESTATIC:
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case SymbolKind::S_REGREL32:
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case SymbolKind::S_GDATA32:
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case SymbolKind::S_LDATA32:
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case SymbolKind::S_LMANDATA:
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case SymbolKind::S_GMANDATA:
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case SymbolKind::S_LTHREAD32:
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case SymbolKind::S_GTHREAD32:
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return 10;
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// See RegisterSym and LocalSym
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case SymbolKind::S_REGISTER:
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case SymbolKind::S_LOCAL:
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return 6;
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// See BlockSym
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case SymbolKind::S_BLOCK32:
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return 18;
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// See LabelSym
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case SymbolKind::S_LABEL32:
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return 7;
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// See ObjNameSym, ExportSym, and UDTSym
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case SymbolKind::S_OBJNAME:
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case SymbolKind::S_EXPORT:
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case SymbolKind::S_UDT:
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return 4;
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// See BPRelativeSym
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case SymbolKind::S_BPREL32:
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return 8;
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default:
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return -1;
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}
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}
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StringRef llvm::codeview::getSymbolName(CVSymbol Sym) {
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if (Sym.kind() == SymbolKind::S_CONSTANT) {
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// S_CONSTANT is preceded by an APSInt, which has a variable length. So we
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// have to do a full deserialization.
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BinaryStreamReader Reader(Sym.content(), llvm::support::little);
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// The container doesn't matter for single records.
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SymbolRecordMapping Mapping(Reader, CodeViewContainer::ObjectFile);
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ConstantSym Const(SymbolKind::S_CONSTANT);
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cantFail(Mapping.visitSymbolBegin(Sym));
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cantFail(Mapping.visitKnownRecord(Sym, Const));
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cantFail(Mapping.visitSymbolEnd(Sym));
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return Const.Name;
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}
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int Offset = getSymbolNameOffset(Sym);
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if (Offset == -1)
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return StringRef();
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StringRef StringData = toStringRef(Sym.content()).drop_front(Offset);
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return StringData.split('\0').first;
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}
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