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//===- DebugSubsectionRecord.cpp -----------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
#include "llvm/Support/BinaryStreamReader.h"
using namespace llvm;
using namespace llvm::codeview;
DebugSubsectionRecord::DebugSubsectionRecord()
: Kind(DebugSubsectionKind::None) {}
DebugSubsectionRecord::DebugSubsectionRecord(DebugSubsectionKind Kind,
BinaryStreamRef Data)
: Kind(Kind), Data(Data) {}
Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
DebugSubsectionRecord &Info) {
const DebugSubsectionHeader *Header;
BinaryStreamReader Reader(Stream);
if (auto EC = Reader.readObject(Header))
return EC;
DebugSubsectionKind Kind =
static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
switch (Kind) {
case DebugSubsectionKind::FileChecksums:
case DebugSubsectionKind::Lines:
case DebugSubsectionKind::InlineeLines:
break;
default:
llvm_unreachable("Unexpected debug fragment kind!");
}
if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
return EC;
Info.Kind = Kind;
return Error::success();
}
uint32_t DebugSubsectionRecord::getRecordLength() const {
uint32_t Result = sizeof(DebugSubsectionHeader) + Data.getLength();
assert(Result % 4 == 0);
return Result;
}
DebugSubsectionKind DebugSubsectionRecord::kind() const { return Kind; }
BinaryStreamRef DebugSubsectionRecord::getRecordData() const { return Data; }
DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
DebugSubsectionKind Kind, DebugSubsection &Frag)
: Kind(Kind), Frag(Frag) {}
uint32_t DebugSubsectionRecordBuilder::calculateSerializedLength() {
uint32_t Size = sizeof(DebugSubsectionHeader) +
alignTo(Frag.calculateSerializedSize(), 4);
return Size;
}
Error DebugSubsectionRecordBuilder::commit(BinaryStreamWriter &Writer) {
DebugSubsectionHeader Header;
Header.Kind = uint32_t(Kind);
Header.Length = calculateSerializedLength() - sizeof(DebugSubsectionHeader);
if (auto EC = Writer.writeObject(Header))
return EC;
if (auto EC = Frag.commit(Writer))
return EC;
if (auto EC = Writer.padToAlignment(4))
return EC;
return Error::success();
}
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