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📄 DWARFAbbreviationDeclaration.h(6.28 KB)
📄 DWARFAcceleratorTable.h(20.63 KB)
📄 DWARFAddressRange.h(2.84 KB)
📄 DWARFAttribute.h(1.59 KB)
📄 DWARFCompileUnit.h(1.46 KB)
📄 DWARFContext.h(14.72 KB)
📄 DWARFDataExtractor.h(3.96 KB)
📄 DWARFDebugAbbrev.h(2.24 KB)
📄 DWARFDebugAddr.h(2.89 KB)
📄 DWARFDebugArangeSet.h(2.36 KB)
📄 DWARFDebugAranges.h(2.3 KB)
📄 DWARFDebugFrame.h(11.7 KB)
📄 DWARFDebugInfoEntry.h(2.01 KB)
📄 DWARFDebugLine.h(15.76 KB)
📄 DWARFDebugLoc.h(5.33 KB)
📄 DWARFDebugMacro.h(4.61 KB)
📄 DWARFDebugPubTable.h(2.6 KB)
📄 DWARFDebugRangeList.h(3.03 KB)
📄 DWARFDebugRnglists.h(2.61 KB)
📄 DWARFDie.h(17.6 KB)
📄 DWARFExpression.h(5.49 KB)
📄 DWARFFormValue.h(12.23 KB)
📄 DWARFGdbIndex.h(2.21 KB)
📄 DWARFListTable.h(10.76 KB)
📄 DWARFLocationExpression.h(1.69 KB)
📄 DWARFObject.h(4.56 KB)
📄 DWARFRelocMap.h(1.38 KB)
📄 DWARFSection.h(689 B)
📄 DWARFTypeUnit.h(1.68 KB)
📄 DWARFUnit.h(20.2 KB)
📄 DWARFUnitIndex.h(5.32 KB)
📄 DWARFVerifier.h(13.31 KB)

Editing: DWARFDataExtractor.h

//===- DWARFDataExtractor.h -------------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_DEBUGINFO_DWARFDATAEXTRACTOR_H
#define LLVM_DEBUGINFO_DWARFDATAEXTRACTOR_H

#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/DebugInfo/DWARF/DWARFSection.h"
#include "llvm/Support/DataExtractor.h"

namespace llvm {
class DWARFObject;

/// A DataExtractor (typically for an in-memory copy of an object-file section)
/// plus a relocation map for that section, if there is one.
class DWARFDataExtractor : public DataExtractor {
  const DWARFObject *Obj = nullptr;
  const DWARFSection *Section = nullptr;

public:
  /// Constructor for the normal case of extracting data from a DWARF section.
  /// The DWARFSection's lifetime must be at least as long as the extractor's.
  DWARFDataExtractor(const DWARFObject &Obj, const DWARFSection &Section,
                     bool IsLittleEndian, uint8_t AddressSize)
      : DataExtractor(Section.Data, IsLittleEndian, AddressSize), Obj(&Obj),
        Section(&Section) {}

/// Constructor for cases when there are no relocations.
  DWARFDataExtractor(StringRef Data, bool IsLittleEndian, uint8_t AddressSize)
    : DataExtractor(Data, IsLittleEndian, AddressSize) {}
  DWARFDataExtractor(ArrayRef<uint8_t> Data, bool IsLittleEndian,
                     uint8_t AddressSize)
      : DataExtractor(
            StringRef(reinterpret_cast<const char *>(Data.data()), Data.size()),
            IsLittleEndian, AddressSize) {}

/// Truncating constructor
  DWARFDataExtractor(const DWARFDataExtractor &Other, size_t Length)
      : DataExtractor(Other.getData().substr(0, Length), Other.isLittleEndian(),
                      Other.getAddressSize()),
        Obj(Other.Obj), Section(Other.Section) {}

/// Extracts the DWARF "initial length" field, which can either be a 32-bit
  /// value smaller than 0xfffffff0, or the value 0xffffffff followed by a
  /// 64-bit length. Returns the actual length, and the DWARF format which is
  /// encoded in the field. In case of errors, it returns {0, DWARF32} and
  /// leaves the offset unchanged.
  std::pair<uint64_t, dwarf::DwarfFormat>
  getInitialLength(uint64_t *Off, Error *Err = nullptr) const;

std::pair<uint64_t, dwarf::DwarfFormat> getInitialLength(Cursor &C) const {
    return getInitialLength(&getOffset(C), &getError(C));
  }

/// Extracts a value and applies a relocation to the result if
  /// one exists for the given offset.
  uint64_t getRelocatedValue(uint32_t Size, uint64_t *Off,
                             uint64_t *SectionIndex = nullptr,
                             Error *Err = nullptr) const;
  uint64_t getRelocatedValue(Cursor &C, uint32_t Size,
                             uint64_t *SectionIndex = nullptr) const {
    return getRelocatedValue(Size, &getOffset(C), SectionIndex, &getError(C));
  }

/// Extracts an address-sized value and applies a relocation to the result if
  /// one exists for the given offset.
  uint64_t getRelocatedAddress(uint64_t *Off, uint64_t *SecIx = nullptr) const {
    return getRelocatedValue(getAddressSize(), Off, SecIx);
  }
  uint64_t getRelocatedAddress(Cursor &C, uint64_t *SecIx = nullptr) const {
    return getRelocatedValue(getAddressSize(), &getOffset(C), SecIx,
                             &getError(C));
  }

/// Extracts a DWARF-encoded pointer in \p Offset using \p Encoding.
  /// There is a DWARF encoding that uses a PC-relative adjustment.
  /// For these values, \p AbsPosOffset is used to fix them, which should
  /// reflect the absolute address of this pointer.
  Optional<uint64_t> getEncodedPointer(uint64_t *Offset, uint8_t Encoding,
                                       uint64_t AbsPosOffset = 0) const;
};

} // end namespace llvm

#endif // LLVM_DEBUGINFO_DWARFDATAEXTRACTOR_H

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Editing: DWARFDataExtractor.h

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