Skip to content

Instantly share code, notes, and snippets.

What would you like to do?
Go code to get the name of the function that invoked the current function
package main
import (
// whoCalledMe is a function that returns the name, fileName, and lineNumber of the caller that called function X
// the code doesn't check for edge cases
func whoCalledMe() (callerName, callerFileName string, callerLineNumber int) {
// program counters, only interested in 1 pc, the pc of my caller
pc := make([]uintptr, 1)
// skip == 0 is runtime.Callers itself
// skip == 1 is this function that called runtime.Callers
// skip == 2 is the function that called this function, call it X
// skip == 3 is the function that called X
runtime.Callers(3, pc)
// by now, pc contains number x such that x is the pc of the caller
// we call runtime.CallersFrames to get the stack frames of all program counters in pc
frames := runtime.CallersFrames(pc)
// extract the caller's frame
f, _ := frames.Next()
callerName, callerFileName, callerLineNumber = f.Function, f.File, f.Line
func helloStranger() {
callerName, callerFileName, callerLineNum := whoCalledMe()
fmt.Printf("This function called me: %v\n", callerName)
fmt.Printf("It's located in: %v on line: %v\n", callerFileName, callerLineNum)
func main() {
// output
// This function called me: main.main
// It's located in: C:/Users/x/y/z/main.go on line: 33
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment