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comparison: toolkit/crashreporter/google-breakpad/src/common/dwarf/dwarf2reader_test_common.h

toolkit/crashreporter/google-breakpad/src/common/dwarf/dwarf2reader_test_common.h

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TOR_BUG_3246
changeset 7
129ffea94266
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-1:000000000000 0:737490dcc637
1 // -*- mode: c++ -*-
2
3 // Copyright (c) 2012, Google Inc.
4 // All rights reserved.
5 //
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions are
8 // met:
9 //
10 // * Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following disclaimer.
12 // * Redistributions in binary form must reproduce the above
13 // copyright notice, this list of conditions and the following disclaimer
14 // in the documentation and/or other materials provided with the
15 // distribution.
16 // * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
19 //
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32 // Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
33
34 // dwarf2reader_test_common.h: Define TestCompilationUnit and
35 // TestAbbrevTable, classes for creating properly (and improperly)
36 // formatted DWARF compilation unit data for unit tests.
37
38 #ifndef COMMON_DWARF_DWARF2READER_TEST_COMMON_H__
39 #define COMMON_DWARF_DWARF2READER_TEST_COMMON_H__
40
41 #include "common/test_assembler.h"
42 #include "common/dwarf/dwarf2enums.h"
43
44 // A subclass of test_assembler::Section, specialized for constructing
45 // DWARF compilation units.
46 class TestCompilationUnit: public google_breakpad::test_assembler::Section {
47 public:
48 typedef dwarf2reader::DwarfTag DwarfTag;
49 typedef dwarf2reader::DwarfAttribute DwarfAttribute;
50 typedef dwarf2reader::DwarfForm DwarfForm;
51 typedef google_breakpad::test_assembler::Label Label;
52
53 // Set the section's DWARF format size (the 32-bit DWARF format or the
54 // 64-bit DWARF format, for lengths and section offsets --- not the
55 // address size) to format_size.
56 void set_format_size(size_t format_size) {
57 assert(format_size == 4 || format_size == 8);
58 format_size_ = format_size;
59 }
60
61 // Append a DWARF section offset value, of the appropriate size for this
62 // compilation unit.
63 template<typename T>
64 void SectionOffset(T offset) {
65 if (format_size_ == 4)
66 D32(offset);
67 else
68 D64(offset);
69 }
70
71 // Append a DWARF compilation unit header to the section, with the given
72 // DWARF version, abbrev table offset, and address size.
73 TestCompilationUnit &Header(int version, const Label &abbrev_offset,
74 size_t address_size) {
75 if (format_size_ == 4) {
76 D32(length_);
77 } else {
78 D32(0xffffffff);
79 D64(length_);
80 }
81 post_length_offset_ = Size();
82 D16(version);
83 SectionOffset(abbrev_offset);
84 D8(address_size);
85 return *this;
86 }
87
88 // Mark the end of this header's DIEs.
89 TestCompilationUnit &Finish() {
90 length_ = Size() - post_length_offset_;
91 return *this;
92 }
93
94 private:
95 // The DWARF format size for this compilation unit.
96 size_t format_size_;
97
98 // The offset of the point in the compilation unit header immediately
99 // after the initial length field.
100 uint64_t post_length_offset_;
101
102 // The length of the compilation unit, not including the initial length field.
103 Label length_;
104 };
105
106 // A subclass of test_assembler::Section specialized for constructing DWARF
107 // abbreviation tables.
108 class TestAbbrevTable: public google_breakpad::test_assembler::Section {
109 public:
110 typedef dwarf2reader::DwarfTag DwarfTag;
111 typedef dwarf2reader::DwarfAttribute DwarfAttribute;
112 typedef dwarf2reader::DwarfForm DwarfForm;
113 typedef dwarf2reader::DwarfHasChild DwarfHasChild;
114 typedef google_breakpad::test_assembler::Label Label;
115
116 // Start a new abbreviation table entry for abbreviation code |code|,
117 // encoding a DIE whose tag is |tag|, and which has children if and only
118 // if |has_children| is true.
119 TestAbbrevTable &Abbrev(int code, DwarfTag tag, DwarfHasChild has_children) {
120 assert(code != 0);
121 ULEB128(code);
122 ULEB128(static_cast<unsigned>(tag));
123 D8(static_cast<unsigned>(has_children));
124 return *this;
125 };
126
127 // Add an attribute to the current abbreviation code whose name is |name|
128 // and whose form is |form|.
129 TestAbbrevTable &Attribute(DwarfAttribute name, DwarfForm form) {
130 ULEB128(static_cast<unsigned>(name));
131 ULEB128(static_cast<unsigned>(form));
132 return *this;
133 }
134
135 // Finish the current abbreviation code.
136 TestAbbrevTable &EndAbbrev() {
137 ULEB128(0);
138 ULEB128(0);
139 return *this;
140 }
141
142 // Finish the current abbreviation table.
143 TestAbbrevTable &EndTable() {
144 ULEB128(0);
145 return *this;
146 }
147 };
148
149 #endif // COMMON_DWARF_DWARF2READER_TEST_COMMON_H__

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