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//===- SymbolSerializer.h ---------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEBUGINFO_CODEVIEW_SYMBOLSERIALIZER_H
#define LLVM_DEBUGINFO_CODEVIEW_SYMBOLSERIALIZER_H
#include "llvm/ADT/Optional.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/RecordSerialization.h"
#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
#include "llvm/DebugInfo/CodeView/SymbolRecordMapping.h"
#include "llvm/DebugInfo/CodeView/SymbolVisitorCallbacks.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/BinaryStreamWriter.h"
#include "llvm/Support/Error.h"
#include <cstdint>
#include <vector>
namespace llvm {
namespace codeview {
class SymbolSerializer : public SymbolVisitorCallbacks {
BumpPtrAllocator &Storage;
// Since this is a fixed size buffer, use a stack allocated buffer. This
// yields measurable performance increase over the repeated heap allocations
// when serializing many independent records via writeOneSymbol.
std::array<uint8_t, MaxRecordLength> RecordBuffer;
MutableBinaryByteStream Stream;
BinaryStreamWriter Writer;
SymbolRecordMapping Mapping;
Optional<SymbolKind> CurrentSymbol;
Error writeRecordPrefix(SymbolKind Kind) {
RecordPrefix Prefix;
Prefix.RecordKind = Kind;
Prefix.RecordLen = 0;
if (auto EC = Writer.writeObject(Prefix))
return EC;
return Error::success();
}
public:
SymbolSerializer(BumpPtrAllocator &Storage, CodeViewContainer Container);
template <typename SymType>
static CVSymbol writeOneSymbol(SymType &Sym, BumpPtrAllocator &Storage,
CodeViewContainer Container) {
CVSymbol Result;
Result.Type = static_cast<SymbolKind>(Sym.Kind);
SymbolSerializer Serializer(Storage, Container);
consumeError(Serializer.visitSymbolBegin(Result));
consumeError(Serializer.visitKnownRecord(Result, Sym));
consumeError(Serializer.visitSymbolEnd(Result));
return Result;
}
Error visitSymbolBegin(CVSymbol &Record) override;
Error visitSymbolEnd(CVSymbol &Record) override;
#define SYMBOL_RECORD(EnumName, EnumVal, Name) \
Error visitKnownRecord(CVSymbol &CVR, Name &Record) override { \
return visitKnownRecordImpl(CVR, Record); \
}
#define SYMBOL_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
#include "llvm/DebugInfo/CodeView/CodeViewSymbols.def"
private:
template <typename RecordKind>
Error visitKnownRecordImpl(CVSymbol &CVR, RecordKind &Record) {
return Mapping.visitKnownRecord(CVR, Record);
}
};
} // end namespace codeview
} // end namespace llvm
#endif // LLVM_DEBUGINFO_CODEVIEW_SYMBOLSERIALIZER_H
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