-
Notifications
You must be signed in to change notification settings - Fork 0
/
profile.go
55 lines (51 loc) · 1.52 KB
/
profile.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
// Copyright 2023 Google LLC
//
// 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 weaver
import (
"bytes"
"context"
"fmt"
"runtime/pprof"
"time"
"github.com/TiagoMalhadas/xcweaver/runtime/protos"
)
// getProfile collects a profile of this process.
func getProfile(ctx context.Context, req *protos.GetProfileRequest) ([]byte, error) {
var buf bytes.Buffer
switch req.ProfileType {
case protos.ProfileType_Heap:
if err := pprof.WriteHeapProfile(&buf); err != nil {
return nil, err
}
case protos.ProfileType_CPU:
if req.CpuDurationNs == 0 {
return nil, fmt.Errorf("invalid zero duration for the CPU profile collection")
}
dur := time.Duration(req.CpuDurationNs) * time.Nanosecond
if err := pprof.StartCPUProfile(&buf); err != nil {
return nil, err
}
select {
case <-ctx.Done():
pprof.StopCPUProfile()
return nil, ctx.Err()
case <-time.After(dur):
// All done
}
pprof.StopCPUProfile()
default:
return nil, fmt.Errorf("unspecified profile collection type")
}
return buf.Bytes(), nil
}