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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
//===- DebugSubsectionRecord.cpp ------------------------------------------===//
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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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#include "llvm/DebugInfo/CodeView/DebugSubsectionRecord.h"
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MathExtras.h"
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#include <algorithm>
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#include <cassert>
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#include <cstdint>
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using namespace llvm;
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using namespace llvm::codeview;
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DebugSubsectionRecord::DebugSubsectionRecord() = default;
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DebugSubsectionRecord::DebugSubsectionRecord(DebugSubsectionKind Kind,
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BinaryStreamRef Data,
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CodeViewContainer Container)
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: Container(Container), Kind(Kind), Data(Data) {}
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Error DebugSubsectionRecord::initialize(BinaryStreamRef Stream,
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DebugSubsectionRecord &Info,
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CodeViewContainer Container) {
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const DebugSubsectionHeader *Header;
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BinaryStreamReader Reader(Stream);
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if (auto EC = Reader.readObject(Header))
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return EC;
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DebugSubsectionKind Kind =
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static_cast<DebugSubsectionKind>(uint32_t(Header->Kind));
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if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
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return EC;
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Info.Container = Container;
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Info.Kind = Kind;
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return Error::success();
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}
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uint32_t DebugSubsectionRecord::getRecordLength() const {
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return sizeof(DebugSubsectionHeader) + Data.getLength();
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}
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DebugSubsectionKind DebugSubsectionRecord::kind() const { return Kind; }
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BinaryStreamRef DebugSubsectionRecord::getRecordData() const { return Data; }
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DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
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std::shared_ptr<DebugSubsection> Subsection, CodeViewContainer Container)
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: Subsection(std::move(Subsection)), Container(Container) {}
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DebugSubsectionRecordBuilder::DebugSubsectionRecordBuilder(
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const DebugSubsectionRecord &Contents, CodeViewContainer Container)
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: Contents(Contents), Container(Container) {}
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uint32_t DebugSubsectionRecordBuilder::calculateSerializedLength() {
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uint32_t DataSize = Subsection ? Subsection->calculateSerializedSize()
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: Contents.getRecordData().getLength();
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// The length of the entire subsection is always padded to 4 bytes,
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// regardless of the container kind.
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return sizeof(DebugSubsectionHeader) + alignTo(DataSize, 4);
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}
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Error DebugSubsectionRecordBuilder::commit(BinaryStreamWriter &Writer) const {
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assert(Writer.getOffset() % alignOf(Container) == 0 &&
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"Debug Subsection not properly aligned");
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DebugSubsectionHeader Header;
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Header.Kind = uint32_t(Subsection ? Subsection->kind() : Contents.kind());
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// The value written into the Header's Length field is only padded to the
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// container's alignment
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uint32_t DataSize = Subsection ? Subsection->calculateSerializedSize()
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: Contents.getRecordData().getLength();
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Header.Length = alignTo(DataSize, alignOf(Container));
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if (auto EC = Writer.writeObject(Header))
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return EC;
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if (Subsection) {
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if (auto EC = Subsection->commit(Writer))
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return EC;
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} else {
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if (auto EC = Writer.writeStreamRef(Contents.getRecordData()))
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return EC;
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}
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if (auto EC = Writer.padToAlignment(4))
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return EC;
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return Error::success();
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}
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