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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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
//===- DebugSubsectionRecord.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_DEBUGSUBSECTIONRECORD_H
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#define LLVM_DEBUGINFO_CODEVIEW_DEBUGSUBSECTIONRECORD_H
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#include "llvm/DebugInfo/CodeView/CodeView.h"
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#include "llvm/Support/BinaryStreamArray.h"
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#include "llvm/Support/BinaryStreamRef.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MathExtras.h"
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#include <cstdint>
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#include <memory>
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namespace llvm {
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class BinaryStreamWriter;
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namespace codeview {
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class DebugSubsection;
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// Corresponds to the `CV_DebugSSubsectionHeader_t` structure.
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struct DebugSubsectionHeader {
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support::ulittle32_t Kind; // codeview::DebugSubsectionKind enum
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support::ulittle32_t Length; // number of bytes occupied by this record.
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};
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class DebugSubsectionRecord {
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public:
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DebugSubsectionRecord();
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DebugSubsectionRecord(DebugSubsectionKind Kind, BinaryStreamRef Data,
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CodeViewContainer Container);
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static Error initialize(BinaryStreamRef Stream, DebugSubsectionRecord &Info,
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CodeViewContainer Container);
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uint32_t getRecordLength() const;
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DebugSubsectionKind kind() const;
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BinaryStreamRef getRecordData() const;
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private:
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CodeViewContainer Container = CodeViewContainer::ObjectFile;
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DebugSubsectionKind Kind = DebugSubsectionKind::None;
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BinaryStreamRef Data;
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};
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class DebugSubsectionRecordBuilder {
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public:
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DebugSubsectionRecordBuilder(std::shared_ptr<DebugSubsection> Subsection,
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CodeViewContainer Container);
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/// Use this to copy existing subsections directly from source to destination.
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/// For example, line table subsections in an object file only need to be
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/// relocated before being copied into the PDB.
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DebugSubsectionRecordBuilder(const DebugSubsectionRecord &Contents,
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CodeViewContainer Container);
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uint32_t calculateSerializedLength();
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Error commit(BinaryStreamWriter &Writer) const;
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private:
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/// The subsection to build. Will be null if Contents is non-empty.
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std::shared_ptr<DebugSubsection> Subsection;
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/// The bytes of the subsection. Only non-empty if Subsection is null.
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DebugSubsectionRecord Contents;
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CodeViewContainer Container;
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};
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} // end namespace codeview
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template <> struct VarStreamArrayExtractor<codeview::DebugSubsectionRecord> {
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Error operator()(BinaryStreamRef Stream, uint32_t &Length,
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codeview::DebugSubsectionRecord &Info) {
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// FIXME: We need to pass the container type through to this function. In
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// practice this isn't super important since the subsection header describes
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// its length and we can just skip it. It's more important when writing.
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if (auto EC = codeview::DebugSubsectionRecord::initialize(
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Stream, Info, codeview::CodeViewContainer::Pdb))
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return EC;
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Length = alignTo(Info.getRecordLength(), 4);
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return Error::success();
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}
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};
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namespace codeview {
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using DebugSubsectionArray = VarStreamArray<DebugSubsectionRecord>;
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} // end namespace codeview
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_CODEVIEW_DEBUGSUBSECTIONRECORD_H
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