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 //go:build go1.9 16 // +build go1.9 17 18 package tag 19 20 import ( 21 "context" 22 "runtime/pprof" 23 ) 24 25 func do(ctx context.Context, f func(ctx context.Context)) { 26 m := FromContext(ctx) 27 keyvals := make([]string, 0, 2*len(m.m)) 28 for k, v := range m.m { 29 keyvals = append(keyvals, k.Name(), v.value) 30 } 31 pprof.Do(ctx, pprof.Labels(keyvals...), f) 32 } 33