Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/Object/Decompressor.h
Line
Count
Source (jump to first uncovered line)
1
//===-- Decompressor.h ------------------------------------------*- C++ -*-===//
2
//
3
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4
// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6
//
7
//===----------------------------------------------------------------------===/
8
9
#ifndef LLVM_OBJECT_DECOMPRESSOR_H
10
#define LLVM_OBJECT_DECOMPRESSOR_H
11
12
#include "llvm/ADT/SmallString.h"
13
#include "llvm/ADT/StringRef.h"
14
#include "llvm/Object/ObjectFile.h"
15
16
namespace llvm {
17
namespace object {
18
19
/// Decompressor helps to handle decompression of compressed sections.
20
class Decompressor {
21
public:
22
  /// Create decompressor object.
23
  /// @param Name        Section name.
24
  /// @param Data        Section content.
25
  /// @param IsLE        Flag determines if Data is in little endian form.
26
  /// @param Is64Bit     Flag determines if object is 64 bit.
27
  static Expected<Decompressor> create(StringRef Name, StringRef Data,
28
                                       bool IsLE, bool Is64Bit);
29
30
  /// Resize the buffer and uncompress section data into it.
31
  /// @param Out         Destination buffer.
32
38
  template <class T> Error resizeAndDecompress(T &Out) {
33
38
    Out.resize(DecompressedSize);
34
38
    return decompress({Out.data(), (size_t)DecompressedSize});
35
38
  }
36
37
  /// Uncompress section data to raw buffer provided.
38
  /// @param Buffer      Destination buffer.
39
  Error decompress(MutableArrayRef<char> Buffer);
40
41
  /// Return memory buffer size required for decompression.
42
0
  uint64_t getDecompressedSize() { return DecompressedSize; }
43
44
  /// Return true if section is compressed, including gnu-styled case.
45
  static bool isCompressed(const object::SectionRef &Section);
46
47
  /// Return true if section is a ELF compressed one.
48
  static bool isCompressedELFSection(uint64_t Flags, StringRef Name);
49
50
  /// Return true if section name matches gnu style compressed one.
51
  static bool isGnuStyle(StringRef Name);
52
53
private:
54
  Decompressor(StringRef Data);
55
56
  Error consumeCompressedGnuHeader();
57
  Error consumeCompressedZLibHeader(bool Is64Bit, bool IsLittleEndian);
58
59
  StringRef SectionData;
60
  uint64_t DecompressedSize;
61
};
62
63
} // end namespace object
64
} // end namespace llvm
65
66
#endif // LLVM_OBJECT_DECOMPRESSOR_H