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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package dwarf_test
import (
. "debug/dwarf"
"reflect"
"testing"
)
func TestSplit(t *testing.T) {
// debug/dwarf doesn't (currently) support split DWARF, but
// the attributes that pointed to the split DWARF used to
// cause loading the DWARF data to fail entirely (issue
// #12592). Test that we can at least read the DWARF data.
d := elfData(t, "testdata/split.elf")
r := d.Reader()
e, err := r.Next()
if err != nil {
t.Fatal(err)
}
if e.Tag != TagCompileUnit {
t.Fatalf("bad tag: have %s, want %s", e.Tag, TagCompileUnit)
}
// Check that we were able to parse the unknown section offset
// field, even if we can't figure out its DWARF class.
const AttrGNUAddrBase Attr = 0x2133
f := e.AttrField(AttrGNUAddrBase)
if _, ok := f.Val.(int64); !ok {
t.Fatalf("bad attribute value type: have %T, want int64", f.Val)
}
if f.Class != ClassUnknown {
t.Fatalf("bad class: have %s, want %s", f.Class, ClassUnknown)
}
}
// wantRange maps from a PC to the ranges of the compilation unit
// containing that PC.
type wantRange struct {
pc uint64
ranges [][2]uint64
}
func TestReaderSeek(t *testing.T) {
want := []wantRange{
{0x40059d, [][2]uint64{{0x40059d, 0x400601}}},
{0x400600, [][2]uint64{{0x40059d, 0x400601}}},
{0x400601, [][2]uint64{{0x400601, 0x400611}}},
{0x4005f0, [][2]uint64{{0x40059d, 0x400601}}}, // loop test
{0x10, nil},
{0x400611, nil},
}
testRanges(t, "testdata/line-gcc.elf", want)
}
func TestRangesSection(t *testing.T) {
want := []wantRange{
{0x400500, [][2]uint64{{0x400500, 0x400549}, {0x400400, 0x400408}}},
{0x400400, [][2]uint64{{0x400500, 0x400549}, {0x400400, 0x400408}}},
{0x400548, [][2]uint64{{0x400500, 0x400549}, {0x400400, 0x400408}}},
{0x400407, [][2]uint64{{0x400500, 0x400549}, {0x400400, 0x400408}}},
{0x400408, nil},
{0x400449, nil},
{0x4003ff, nil},
}
testRanges(t, "testdata/ranges.elf", want)
}
func testRanges(t *testing.T, name string, want []wantRange) {
d := elfData(t, name)
r := d.Reader()
for _, w := range want {
entry, err := r.SeekPC(w.pc)
if err != nil {
if w.ranges != nil {
t.Errorf("%s: missing Entry for %#x", name, w.pc)
}
if err != ErrUnknownPC {
t.Errorf("%s: expected ErrUnknownPC for %#x, got %v", name, w.pc, err)
}
continue
}
ranges, err := d.Ranges(entry)
if err != nil {
t.Errorf("%s: %v", name, err)
continue
}
if !reflect.DeepEqual(ranges, w.ranges) {
t.Errorf("%s: for %#x got %x, expected %x", name, w.pc, ranges, w.ranges)
}
}
}
func TestReaderRanges(t *testing.T) {
d := elfData(t, "testdata/line-gcc.elf")
subprograms := []struct {
name string
ranges [][2]uint64
}{
{"f1", [][2]uint64{{0x40059d, 0x4005e7}}},
{"main", [][2]uint64{{0x4005e7, 0x400601}}},
{"f2", [][2]uint64{{0x400601, 0x400611}}},
}
r := d.Reader()
i := 0
for entry, err := r.Next(); entry != nil && err == nil; entry, err = r.Next() {
if entry.Tag != TagSubprogram {
continue
}
if i > len(subprograms) {
t.Fatalf("too many subprograms (expected at most %d)", i)
}
if got := entry.Val(AttrName).(string); got != subprograms[i].name {
t.Errorf("subprogram %d name is %s, expected %s", i, got, subprograms[i].name)
}
ranges, err := d.Ranges(entry)
if err != nil {
t.Errorf("subprogram %d: %v", i, err)
continue
}
if !reflect.DeepEqual(ranges, subprograms[i].ranges) {
t.Errorf("subprogram %d ranges are %x, expected %x", i, ranges, subprograms[i].ranges)
}
i++
}
if i < len(subprograms) {
t.Errorf("saw only %d subprograms, expected %d", i, len(subprograms))
}
}
func Test64Bit(t *testing.T) {
// I don't know how to generate a 64-bit DWARF debug
// compilation unit except by using XCOFF, so this is
// hand-written.
tests := []struct {
name string
info []byte
}{
{
"32-bit little",
[]byte{0x30, 0, 0, 0, // comp unit length
4, 0, // DWARF version 4
0, 0, 0, 0, // abbrev offset
8, // address size
0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
},
},
{
"64-bit little",
[]byte{0xff, 0xff, 0xff, 0xff, // 64-bit DWARF
0x30, 0, 0, 0, 0, 0, 0, 0, // comp unit length
4, 0, // DWARF version 4
0, 0, 0, 0, 0, 0, 0, 0, // abbrev offset
8, // address size
0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
},
},
{
"64-bit big",
[]byte{0xff, 0xff, 0xff, 0xff, // 64-bit DWARF
0, 0, 0, 0, 0, 0, 0, 0x30, // comp unit length
0, 4, // DWARF version 4
0, 0, 0, 0, 0, 0, 0, 0, // abbrev offset
8, // address size
0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
},
},
}
for _, test := range tests {
_, err := New(nil, nil, nil, test.info, nil, nil, nil, nil)
if err != nil {
t.Errorf("%s: %v", test.name, err)
}
}
}
|
