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3be08b1e5e
The publics stream and globals stream are very similar. They both contain a list of hash buckets that refer into a single shared stream, the symbol record stream. Because of the need for each builder to manage both an independent hash stream as well as a single shared record stream, making the two builders be independent entities is not the right design. This patch merges them into a single class, of which only a single instance is needed to create all 3 streams. PublicsStreamBuilder and GlobalsStreamBuilder are now merged into the single GSIStreamBuilder class, which writes all 3 streams at once. Note that this patch does not contain any functionality change. So we're still not yet writing any records to the globals stream. All we're doing is making it so that when we do start writing records to the globals, this refactor won't have to be part of that patch. Differential Revision: https://reviews.llvm.org/D36489 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310438 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
//===- SymbolDeserializer.h -------------------------------------*- 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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#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(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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