aboutsummaryrefslogtreecommitdiff
path: root/src/common/dwarf/dwarf2reader_test_common.h
blob: e46931a4e03a10415b14e47c0f74ee9afb2965fa (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
// -*- mode: c++ -*-

// Copyright (c) 2012, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>

// dwarf2reader_test_common.h: Define TestCompilationUnit and
// TestAbbrevTable, classes for creating properly (and improperly)
// formatted DWARF compilation unit data for unit tests.

#ifndef COMMON_DWARF_DWARF2READER_TEST_COMMON_H__
#define COMMON_DWARF_DWARF2READER_TEST_COMMON_H__

#include "common/test_assembler.h"
#include "common/dwarf/dwarf2enums.h"

// A subclass of test_assembler::Section, specialized for constructing
// DWARF compilation units.
class TestCompilationUnit: public google_breakpad::test_assembler::Section {
 public:
  typedef dwarf2reader::DwarfTag DwarfTag;
  typedef dwarf2reader::DwarfAttribute DwarfAttribute;
  typedef dwarf2reader::DwarfForm DwarfForm;
  typedef google_breakpad::test_assembler::Label Label;

  // Set the section's DWARF format size (the 32-bit DWARF format or the
  // 64-bit DWARF format, for lengths and section offsets --- not the
  // address size) to format_size.
  void set_format_size(size_t format_size) {
    assert(format_size == 4 || format_size == 8);
    format_size_ = format_size;
  }
    
  // Append a DWARF section offset value, of the appropriate size for this
  // compilation unit.
  template<typename T>
  void SectionOffset(T offset) {
    if (format_size_ == 4)
      D32(offset);
    else
      D64(offset);
  }

  // Append a DWARF compilation unit header to the section, with the given
  // DWARF version, abbrev table offset, and address size.
  TestCompilationUnit &Header(int version, const Label &abbrev_offset,
                              size_t address_size) {
    if (format_size_ == 4) {
      D32(length_);
    } else {
      D32(0xffffffff);
      D64(length_);
    }
    post_length_offset_ = Size();
    D16(version);
    SectionOffset(abbrev_offset);
    D8(address_size);
    return *this;
  }

  // Mark the end of this header's DIEs.
  TestCompilationUnit &Finish() {
    length_ = Size() - post_length_offset_;
    return *this;
  }

 private:
  // The DWARF format size for this compilation unit.
  size_t format_size_;

  // The offset of the point in the compilation unit header immediately
  // after the initial length field.
  u_int64_t post_length_offset_;

  // The length of the compilation unit, not including the initial length field.
  Label length_;
};

// A subclass of test_assembler::Section specialized for constructing DWARF
// abbreviation tables.
class TestAbbrevTable: public google_breakpad::test_assembler::Section {
 public:
  typedef dwarf2reader::DwarfTag DwarfTag;
  typedef dwarf2reader::DwarfAttribute DwarfAttribute;
  typedef dwarf2reader::DwarfForm DwarfForm;
  typedef dwarf2reader::DwarfHasChild DwarfHasChild;
  typedef google_breakpad::test_assembler::Label Label;

  // Start a new abbreviation table entry for abbreviation code |code|,
  // encoding a DIE whose tag is |tag|, and which has children if and only
  // if |has_children| is true.
  TestAbbrevTable &Abbrev(int code, DwarfTag tag, DwarfHasChild has_children) {
    assert(code != 0);
    ULEB128(code);
    ULEB128(static_cast<unsigned>(tag));
    D8(static_cast<unsigned>(has_children));
    return *this;
  };

  // Add an attribute to the current abbreviation code whose name is |name|
  // and whose form is |form|.
  TestAbbrevTable &Attribute(DwarfAttribute name, DwarfForm form) {
    ULEB128(static_cast<unsigned>(name));
    ULEB128(static_cast<unsigned>(form));
    return *this;
  }

  // Finish the current abbreviation code.
  TestAbbrevTable &EndAbbrev() {
    ULEB128(0);
    ULEB128(0);
    return *this;
  }

  // Finish the current abbreviation table.
  TestAbbrevTable &EndTable() {
    ULEB128(0);
    return *this;
  }
};

#endif // COMMON_DWARF_DWARF2READER_TEST_COMMON_H__