84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
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//===- SymbolSerializer.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_SYMBOLSERIALIZER_H
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#define LLVM_DEBUGINFO_CODEVIEW_SYMBOLSERIALIZER_H
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#include "llvm/ADT/Optional.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/RecordSerialization.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/Support/Allocator.h"
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#include "llvm/Support/BinaryByteStream.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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#include "llvm/Support/Error.h"
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#include <cstdint>
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#include <vector>
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namespace llvm {
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namespace codeview {
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class SymbolSerializer : public SymbolVisitorCallbacks {
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BumpPtrAllocator &Storage;
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// Since this is a fixed size buffer, use a stack allocated buffer. This
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// yields measurable performance increase over the repeated heap allocations
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// when serializing many independent records via writeOneSymbol.
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std::array<uint8_t, MaxRecordLength> RecordBuffer;
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MutableBinaryByteStream Stream;
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BinaryStreamWriter Writer;
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SymbolRecordMapping Mapping;
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Optional<SymbolKind> CurrentSymbol;
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Error writeRecordPrefix(SymbolKind Kind) {
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RecordPrefix Prefix;
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Prefix.RecordKind = Kind;
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Prefix.RecordLen = 0;
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if (auto EC = Writer.writeObject(Prefix))
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return EC;
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return Error::success();
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}
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public:
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SymbolSerializer(BumpPtrAllocator &Storage, CodeViewContainer Container);
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template <typename SymType>
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static CVSymbol writeOneSymbol(SymType &Sym, BumpPtrAllocator &Storage,
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CodeViewContainer Container) {
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RecordPrefix Prefix{uint16_t(Sym.Kind)};
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CVSymbol Result(&Prefix, sizeof(Prefix));
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SymbolSerializer Serializer(Storage, Container);
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consumeError(Serializer.visitSymbolBegin(Result));
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consumeError(Serializer.visitKnownRecord(Result, Sym));
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consumeError(Serializer.visitSymbolEnd(Result));
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return Result;
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}
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Error visitSymbolBegin(CVSymbol &Record) override;
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Error visitSymbolEnd(CVSymbol &Record) override;
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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 RecordKind>
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Error visitKnownRecordImpl(CVSymbol &CVR, RecordKind &Record) {
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return Mapping.visitKnownRecord(CVR, Record);
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}
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};
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} // end namespace codeview
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_SYMBOLSERIALIZER_H
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