Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/DebugInfo/DWARF/DWARFDataExtractor.h
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//===- DWARFDataExtractor.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_DWARFDATAEXTRACTOR_H
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#define LLVM_DEBUGINFO_DWARFDATAEXTRACTOR_H
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#include "llvm/DebugInfo/DWARF/DWARFSection.h"
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#include "llvm/Support/DataExtractor.h"
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namespace llvm {
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class DWARFObject;
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/// A DataExtractor (typically for an in-memory copy of an object-file section)
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/// plus a relocation map for that section, if there is one.
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class DWARFDataExtractor : public DataExtractor {
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  const DWARFObject *Obj = nullptr;
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  const DWARFSection *Section = nullptr;
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public:
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  /// Constructor for the normal case of extracting data from a DWARF section.
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  /// The DWARFSection's lifetime must be at least as long as the extractor's.
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  DWARFDataExtractor(const DWARFObject &Obj, const DWARFSection &Section,
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                     bool IsLittleEndian, uint8_t AddressSize)
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      : DataExtractor(Section.Data, IsLittleEndian, AddressSize), Obj(&Obj),
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        Section(&Section) {}
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  /// Constructor for cases when there are no relocations.
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  DWARFDataExtractor(StringRef Data, bool IsLittleEndian, uint8_t AddressSize)
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    : DataExtractor(Data, IsLittleEndian, AddressSize) {}
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  /// Extracts a value and applies a relocation to the result if
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  /// one exists for the given offset.
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  uint64_t getRelocatedValue(uint32_t Size, uint32_t *Off,
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                             uint64_t *SectionIndex = nullptr) const;
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  /// Extracts an address-sized value and applies a relocation to the result if
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  /// one exists for the given offset.
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  uint64_t getRelocatedAddress(uint32_t *Off, uint64_t *SecIx = nullptr) const {
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    return getRelocatedValue(getAddressSize(), Off, SecIx);
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  }
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  /// Extracts a DWARF-encoded pointer in \p Offset using \p Encoding.
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  /// There is a DWARF encoding that uses a PC-relative adjustment.
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  /// For these values, \p AbsPosOffset is used to fix them, which should
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  /// reflect the absolute address of this pointer.
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  Optional<uint64_t> getEncodedPointer(uint32_t *Offset, uint8_t Encoding,
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                                       uint64_t AbsPosOffset = 0) const;
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  size_t size() const { return Section == nullptr ? 
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: Section->Data.size(); }
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};
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} // end namespace llvm
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#endif // LLVM_DEBUGINFO_DWARFDATAEXTRACTOR_H