github.com/psiphon-labs/psiphon-tunnel-core@v2.0.28+incompatible/psiphon/common/stacktrace/stacktrace.go (about) 1 /* 2 * Copyright (c) 2019, Psiphon Inc. 3 * All rights reserved. 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, either version 3 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 * 18 */ 19 20 /* 21 22 Package stacktrace provides helpers for handling stack trace information. 23 24 */ 25 package stacktrace 26 27 import ( 28 "fmt" 29 "runtime" 30 "strings" 31 ) 32 33 // GetFunctionName is a helper that extracts a simple function name from 34 // full name returned by runtime.Func.Name(). This is used to declutter 35 // error messages containing function names. 36 func GetFunctionName(pc uintptr) string { 37 funcName := runtime.FuncForPC(pc).Name() 38 index := strings.LastIndex(funcName, "/") 39 if index != -1 { 40 funcName = funcName[index+1:] 41 } 42 return funcName 43 } 44 45 // GetParentFunctionName returns the caller's parent function name and source 46 // file line number. 47 func GetParentFunctionName() string { 48 pc, _, line, _ := runtime.Caller(2) 49 return fmt.Sprintf("%s#%d", GetFunctionName(pc), line) 50 }