1// Copyright 2018, OpenCensus Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// +build go1.9
16
17package tag
18
19import (
20	"context"
21	"runtime/pprof"
22)
23
24func do(ctx context.Context, f func(ctx context.Context)) {
25	m := FromContext(ctx)
26	keyvals := make([]string, 0, 2*len(m.m))
27	for k, v := range m.m {
28		keyvals = append(keyvals, k.Name(), v.value)
29	}
30	pprof.Do(ctx, pprof.Labels(keyvals...), f)
31}
32