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//===- SimpleTypeSerializer.cpp -----------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/SimpleTypeSerializer.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "llvm/DebugInfo/CodeView/TypeRecordMapping.h"
#include "llvm/Support/BinaryStreamWriter.h"
using namespace llvm;
using namespace llvm::codeview;
static void addPadding(BinaryStreamWriter &Writer) {
uint32_t Align = Writer.getOffset() % 4;
if (Align == 0)
return;
int PaddingBytes = 4 - Align;
while (PaddingBytes > 0) {
uint8_t Pad = static_cast<uint8_t>(LF_PAD0 + PaddingBytes);
cantFail(Writer.writeInteger(Pad));
--PaddingBytes;
}
}
SimpleTypeSerializer::SimpleTypeSerializer() : ScratchBuffer(MaxRecordLength) {}
SimpleTypeSerializer::~SimpleTypeSerializer() {}
template <typename T>
ArrayRef<uint8_t> SimpleTypeSerializer::serialize(T &Record) {
BinaryStreamWriter Writer(ScratchBuffer, support::little);
TypeRecordMapping Mapping(Writer);
// Write the record prefix first with a dummy length but real kind.
RecordPrefix DummyPrefix(uint16_t(Record.getKind()));
cantFail(Writer.writeObject(DummyPrefix));
RecordPrefix *Prefix = reinterpret_cast<RecordPrefix *>(ScratchBuffer.data());
CVType CVT(Prefix, sizeof(RecordPrefix));
cantFail(Mapping.visitTypeBegin(CVT));
cantFail(Mapping.visitKnownRecord(CVT, Record));
cantFail(Mapping.visitTypeEnd(CVT));
addPadding(Writer);
// Update the size and kind after serialization.
Prefix->RecordKind = CVT.kind();
Prefix->RecordLen = Writer.getOffset() - sizeof(uint16_t);
return {ScratchBuffer.data(), Writer.getOffset()};
}
// Explicitly instantiate the member function for each known type so that we can
// implement this in the cpp file.
#define TYPE_RECORD(EnumName, EnumVal, Name) \
template ArrayRef<uint8_t> llvm::codeview::SimpleTypeSerializer::serialize( \
Name##Record &Record);
#define TYPE_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
#define MEMBER_RECORD(EnumName, EnumVal, Name)
#define MEMBER_RECORD_ALIAS(EnumName, EnumVal, Name, AliasName)
#include "llvm/DebugInfo/CodeView/CodeViewTypes.def"
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