How to get the current function name

by

[Note: Go 1.7+ recommends using runtime.CallersFrames instead of runtime.FuncForPC; another answer has an updated example].

Package runtime is your friend here:

func trace() {
    pc := make([]uintptr, 10)  // at least 1 entry needed
    runtime.Callers(2, pc)
    f := runtime.FuncForPC(pc[0])
    file, line := f.FileLine(pc[0])
    fmt.Printf("%s:%d %s\n", file, line, f.Name())
}

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