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4b665d2445
Previously extractors tried to be stateless with any additional context information needed in order to parse items being passed in via the extraction method. This led to quite cumbersome implementation challenges and awkwardness of use. This patch brings back support for stateful extractors, making the implementation and usage simpler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305093 91177308-0d34-0410-b5e6-96231b3b80d8
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
//===- DebugChecksumsSubsection.h -------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEBUGINFO_CODEVIEW_DEBUGCHECKSUMSSUBSECTION_H
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#define LLVM_DEBUGINFO_CODEVIEW_DEBUGCHECKSUMSSUBSECTION_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/BinaryStreamArray.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/Endian.h"
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namespace llvm {
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namespace codeview {
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class DebugStringTableSubsection;
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struct FileChecksumEntry {
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uint32_t FileNameOffset; // Byte offset of filename in global stringtable.
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FileChecksumKind Kind; // The type of checksum.
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ArrayRef<uint8_t> Checksum; // The bytes of the checksum.
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};
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}
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}
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namespace llvm {
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template <> struct VarStreamArrayExtractor<codeview::FileChecksumEntry> {
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public:
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typedef void ContextType;
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Error operator()(BinaryStreamRef Stream, uint32_t &Len,
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codeview::FileChecksumEntry &Item);
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};
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}
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namespace llvm {
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namespace codeview {
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class DebugChecksumsSubsectionRef final : public DebugSubsectionRef {
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typedef VarStreamArray<codeview::FileChecksumEntry> FileChecksumArray;
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typedef FileChecksumArray::Iterator Iterator;
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public:
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DebugChecksumsSubsectionRef()
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: DebugSubsectionRef(DebugSubsectionKind::FileChecksums) {}
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static bool classof(const DebugSubsectionRef *S) {
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return S->kind() == DebugSubsectionKind::FileChecksums;
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}
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bool valid() const { return Checksums.valid(); }
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Error initialize(BinaryStreamReader Reader);
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Error initialize(BinaryStreamRef Stream);
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Iterator begin() const { return Checksums.begin(); }
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Iterator end() const { return Checksums.end(); }
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const FileChecksumArray &getArray() const { return Checksums; }
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private:
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FileChecksumArray Checksums;
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};
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class DebugChecksumsSubsection final : public DebugSubsection {
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public:
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explicit DebugChecksumsSubsection(DebugStringTableSubsection &Strings);
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static bool classof(const DebugSubsection *S) {
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return S->kind() == DebugSubsectionKind::FileChecksums;
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}
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void addChecksum(StringRef FileName, FileChecksumKind Kind,
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ArrayRef<uint8_t> Bytes);
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uint32_t calculateSerializedSize() const override;
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Error commit(BinaryStreamWriter &Writer) const override;
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uint32_t mapChecksumOffset(StringRef FileName) const;
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private:
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DebugStringTableSubsection &Strings;
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DenseMap<uint32_t, uint32_t> OffsetMap;
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uint32_t SerializedSize = 0;
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llvm::BumpPtrAllocator Storage;
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std::vector<FileChecksumEntry> Checksums;
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};
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}
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}
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#endif
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