-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
100 lines (91 loc) · 2.3 KB
/
main.go
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
package main
import (
"debug/dwarf"
"debug/macho"
"fmt"
"io"
"os"
)
// hacked up utility to debug DWARF ARM64 issue using Go's libraries
// qjeremy@uber.com
func main() {
if len(os.Args) < 2 {
fmt.Printf("usage: %v <machofile> [compileunit [compileunit ... ] ]\n", os.Args[0])
return
}
macho, err := macho.Open(os.Args[1])
if err != nil {
fmt.Printf("macho open: %v", err)
return
}
cuNames := make(map[string]bool)
for _, cuName := range os.Args[2:] {
cuNames[cuName] = true
}
dwarfdata, err := macho.DWARF()
if err != nil {
fmt.Printf("dwarf: %v", err)
return
}
reader := dwarfdata.Reader()
nextCu:
for {
entry, err := reader.Next()
if err != nil {
fmt.Printf("reader err: %v", err)
return
}
if entry == nil {
fmt.Printf("finished all entries\n")
break
}
if entry.Tag == dwarf.TagCompileUnit {
cuName, _ := entry.Val(dwarf.AttrName).(string)
if cuNames[cuName] || len(cuNames) == 0 {
fmt.Printf("dumping compile unit %v\n", cuName)
lineReader, err := dwarfdata.LineReader(entry)
if err != nil {
fmt.Printf("lineReader err: %v", err)
continue
}
ranges, err := dwarfdata.Ranges(entry)
if err != nil {
fmt.Printf("obtaining ranges err: %v", err)
} else {
var pcEntry dwarf.LineEntry
for _, rng := range ranges {
fileLine := ""
if err := lineReader.SeekPC(rng[0], &pcEntry); err != nil {
fmt.Printf("Couldn't seek PC for %08X\n", rng[0])
} else {
fileLine = fmt.Sprintf("%s:%d", pcEntry.File.Name, pcEntry.Line)
}
fmt.Printf("[%08X - %08X] (%s)\n", rng[0], rng[1], fileLine)
}
}
lineReader.Reset()
files := lineReader.Files()
for _, file := range files {
if file == nil {
fmt.Printf("unnamed file\n")
}
//fmt.Printf("file: %v\n", file.Name)
}
var lineEntry dwarf.LineEntry
for {
if err := lineReader.Next(&lineEntry); err != nil {
if err != io.EOF {
fmt.Printf("error on linereader.Next, skipping to next CU %v", err)
}
continue nextCu
}
fmt.Printf("0x%08X: IsStmt=%5t prologend=%5t epilogbegin=%5t %s:%d \n",
lineEntry.Address, lineEntry.IsStmt, lineEntry.PrologueEnd, lineEntry.EpilogueBegin,
lineEntry.File.Name, lineEntry.Line,
)
}
}
}
reader.SkipChildren()
}
}