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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
//===- SymbolDeserializer.h -------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_CODEVIEW_SYMBOLDESERIALIZER_H
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#define LLVM_DEBUGINFO_CODEVIEW_SYMBOLDESERIALIZER_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecordMapping.h"
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#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
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#include "llvm/DebugInfo/CodeView/SymbolVisitorDelegate.h"
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#include "llvm/Support/BinaryByteStream.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace codeview {
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class SymbolVisitorDelegate;
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class SymbolDeserializer : public SymbolVisitorCallbacks {
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struct MappingInfo {
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MappingInfo(ArrayRef<uint8_t> RecordData, CodeViewContainer Container)
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: Stream(RecordData, llvm::support::little), Reader(Stream),
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Mapping(Reader, Container) {}
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BinaryByteStream Stream;
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BinaryStreamReader Reader;
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SymbolRecordMapping Mapping;
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};
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public:
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template <typename T> static Error deserializeAs(CVSymbol Symbol, T &Record) {
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// If we're just deserializing one record, then don't worry about alignment
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// as there's nothing that comes after.
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SymbolDeserializer S(nullptr, CodeViewContainer::ObjectFile);
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if (auto EC = S.visitSymbolBegin(Symbol))
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return EC;
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if (auto EC = S.visitKnownRecord(Symbol, Record))
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return EC;
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if (auto EC = S.visitSymbolEnd(Symbol))
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return EC;
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return Error::success();
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}
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template <typename T> static Expected<T> deserializeAs(CVSymbol Symbol) {
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T Record(static_cast<SymbolRecordKind>(Symbol.kind()));
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if (auto EC = deserializeAs<T>(Symbol, Record))
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return std::move(EC);
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return Record;
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}
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explicit SymbolDeserializer(SymbolVisitorDelegate *Delegate,
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CodeViewContainer Container)
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: Delegate(Delegate), Container(Container) {}
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Error visitSymbolBegin(CVSymbol &Record, uint32_t Offset) override {
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return visitSymbolBegin(Record);
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}
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Error visitSymbolBegin(CVSymbol &Record) override {
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assert(!Mapping && "Already in a symbol mapping!");
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Mapping = llvm::make_unique<MappingInfo>(Record.content(), Container);
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return Mapping->Mapping.visitSymbolBegin(Record);
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}
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Error visitSymbolEnd(CVSymbol &Record) override {
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assert(Mapping && "Not in a symbol mapping!");
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auto EC = Mapping->Mapping.visitSymbolEnd(Record);
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Mapping.reset();
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return EC;
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}
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#define SYMBOL_RECORD(EnumName, EnumVal, Name) \
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Error visitKnownRecord(CVSymbol &CVR, Name &Record) override { \
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return visitKnownRecordImpl(CVR, Record); \
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}
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#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
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#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
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private:
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template <typename T> Error visitKnownRecordImpl(CVSymbol &CVR, T &Record) {
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Record.RecordOffset =
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Delegate ? Delegate->getRecordOffset(Mapping->Reader) : 0;
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if (auto EC = Mapping->Mapping.visitKnownRecord(CVR, Record))
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return EC;
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return Error::success();
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}
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SymbolVisitorDelegate *Delegate;
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CodeViewContainer Container;
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std::unique_ptr<MappingInfo> Mapping;
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};
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}
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}
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#endif
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