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  }