1// run
2
3// Copyright 2017 The Go Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style
5// license that can be found in the LICENSE file.
6
7package main
8
9import (
10	"runtime"
11)
12
13func main() {
14	println(caller().frame.Function)
15
16	// Used to erroneously print "main.call.name" instead of
17	// "main.main".
18	println(caller().name())
19}
20
21func caller() call {
22	var pcs [3]uintptr
23	n := runtime.Callers(1, pcs[:])
24	frames := runtime.CallersFrames(pcs[:n])
25	frame, _ := frames.Next()
26	frame, _ = frames.Next()
27
28	return call{frame: frame}
29}
30
31type call struct {
32	frame runtime.Frame
33}
34
35func (c call) name() string {
36	return c.frame.Function
37}
38