-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
cmdprof.go
44 lines (41 loc) · 1005 Bytes
/
cmdprof.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
// Copyright 2020 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package tool
import (
"os"
"runtime"
"runtime/pprof"
)
// installProfiling simplifies cpu/memory profiling for command line tools.
func installProfiling(cpuprof, memprof string) func() {
res := func() {}
if cpuprof != "" {
f, err := os.Create(cpuprof)
if err != nil {
Failf("failed to create cpuprofile file: %v", err)
}
if err := pprof.StartCPUProfile(f); err != nil {
Failf("failed to start cpu profile: %v", err)
}
res = func() {
pprof.StopCPUProfile()
f.Close()
}
}
if memprof != "" {
prev := res
res = func() {
prev()
f, err := os.Create(memprof)
if err != nil {
Failf("failed to create memprofile file: %v", err)
}
defer f.Close()
runtime.GC()
if err := pprof.WriteHeapProfile(f); err != nil {
Failf("failed to write mem profile: %v", err)
}
}
}
return res
}