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
|
// Copyright 2019 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 goobj2
import (
"bytes"
"encoding/binary"
)
// FuncInfo is serialized as a symbol (aux symbol). The symbol data is
// the binary encoding of the struct below.
//
// TODO: make each pcdata a separate symbol?
type FuncInfo struct {
NoSplit uint8
Args uint32
Locals uint32
Pcsp uint32
Pcfile uint32
Pcline uint32
Pcinline uint32
Pcdata []uint32
PcdataEnd uint32
Funcdataoff []uint32
File []SymRef // TODO: just use string?
InlTree []InlTreeNode
}
func (a *FuncInfo) Write(w *bytes.Buffer) {
w.WriteByte(a.NoSplit)
var b [4]byte
writeUint32 := func(x uint32) {
binary.LittleEndian.PutUint32(b[:], x)
w.Write(b[:])
}
writeUint32(a.Args)
writeUint32(a.Locals)
writeUint32(a.Pcsp)
writeUint32(a.Pcfile)
writeUint32(a.Pcline)
writeUint32(a.Pcinline)
writeUint32(uint32(len(a.Pcdata)))
for _, x := range a.Pcdata {
writeUint32(x)
}
writeUint32(a.PcdataEnd)
writeUint32(uint32(len(a.Funcdataoff)))
for _, x := range a.Funcdataoff {
writeUint32(x)
}
writeUint32(uint32(len(a.File)))
for _, f := range a.File {
writeUint32(f.PkgIdx)
writeUint32(f.SymIdx)
}
writeUint32(uint32(len(a.InlTree)))
for i := range a.InlTree {
a.InlTree[i].Write(w)
}
}
func (a *FuncInfo) Read(b []byte) {
a.NoSplit = b[0]
b = b[1:]
readUint32 := func() uint32 {
x := binary.LittleEndian.Uint32(b)
b = b[4:]
return x
}
a.Args = readUint32()
a.Locals = readUint32()
a.Pcsp = readUint32()
a.Pcfile = readUint32()
a.Pcline = readUint32()
a.Pcinline = readUint32()
pcdatalen := readUint32()
a.Pcdata = make([]uint32, pcdatalen)
for i := range a.Pcdata {
a.Pcdata[i] = readUint32()
}
a.PcdataEnd = readUint32()
funcdataofflen := readUint32()
a.Funcdataoff = make([]uint32, funcdataofflen)
for i := range a.Funcdataoff {
a.Funcdataoff[i] = readUint32()
}
filelen := readUint32()
a.File = make([]SymRef, filelen)
for i := range a.File {
a.File[i] = SymRef{readUint32(), readUint32()}
}
inltreelen := readUint32()
a.InlTree = make([]InlTreeNode, inltreelen)
for i := range a.InlTree {
b = a.InlTree[i].Read(b)
}
}
// InlTreeNode is the serialized form of FileInfo.InlTree.
type InlTreeNode struct {
Parent int32
File SymRef
Line int32
Func SymRef
ParentPC int32
}
func (inl *InlTreeNode) Write(w *bytes.Buffer) {
var b [4]byte
writeUint32 := func(x uint32) {
binary.LittleEndian.PutUint32(b[:], x)
w.Write(b[:])
}
writeUint32(uint32(inl.Parent))
writeUint32(inl.File.PkgIdx)
writeUint32(inl.File.SymIdx)
writeUint32(uint32(inl.Line))
writeUint32(inl.Func.PkgIdx)
writeUint32(inl.Func.SymIdx)
writeUint32(uint32(inl.ParentPC))
}
// Read an InlTreeNode from b, return the remaining bytes.
func (inl *InlTreeNode) Read(b []byte) []byte {
readUint32 := func() uint32 {
x := binary.LittleEndian.Uint32(b)
b = b[4:]
return x
}
inl.Parent = int32(readUint32())
inl.File = SymRef{readUint32(), readUint32()}
inl.Line = int32(readUint32())
inl.Func = SymRef{readUint32(), readUint32()}
inl.ParentPC = int32(readUint32())
return b
}
|