forked from istio/tools
/
template.go
84 lines (75 loc) · 1.76 KB
/
template.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
// Copyright 2019 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"bytes"
"text/template"
)
var (
tmpl = template.Must(template.New("reg").Parse(tmplText))
tmplText = `//
// Generated Code, DO NOT EDIT!
//
package {{.PackageName}}
import (
"sync/atomic"
_cover_ "istio.io/pkg/cover"
)
func init() {
{{range $name, $var := .ContextVars }}
_cover_.GetRegistry().Register(
len({{$var}}.Count),
"{{$name}}",
func(o []uint32) {
l := len({{$var}}.Pos)
for i := 0; i < l; i++ {
o[i] = {{$var}}.Pos[i]
}
},
func(o []uint16) {
l := len({{$var}}.NumStmt)
for i := 0; i < l; i++ {
o[i] = {{$var}}.NumStmt[i]
}
},
func(o []uint32) {
l := len({{$var}}.Count)
for i := 0; i < l; i++ {
o[i] = atomic.LoadUint32(&{{$var}}.Count[i])
}
},
func() {
l := len({{$var}}.Count)
for i := 0; i < l; i++ {
atomic.StoreUint32(&{{$var}}.Count[i], 0)
}
})
{{end}}
}
`
)
func generateRegistrationCode(pkgName string, contextVars map[string]string) (string, error) {
var b bytes.Buffer
err := tmpl.Execute(&b, &struct {
PackageName string
ContextVars map[string]string
}{
PackageName: pkgName,
ContextVars: contextVars,
})
if err != nil {
return "", err
}
return b.String(), nil
}