stack_trace.go

package main

import (
    "runtime"
    "fmt"
    "math/rand"
    "time"
)

func main() {
    defer func() {
        if err := recover(); err != nil {
            trace := make([]byte, 1024)
            count := runtime.Stack(trace, true)
            fmt.Printf("Recover from panic: %s\n", err)
            fmt.Printf("Stack of %d bytes: %s\n", count, trace)
        }
    }()
    outer()
}

func outer() {
  rand.Seed(int64(time.Now().UnixNano()))
  switch rand.Intn(4)+1 {
  case 1: inner1()
  case 2: inner2()
  case 3: inner3()
  case 4: inner4()
  }
}

func inner1() {
  panic("Fake error1!")
}

func inner2() {
  panic("Fake error2!")
}
func inner3() {
  panic("Fake error3!")
}
func inner4() {
  panic("Fake error4!")
}

http://play.golang.org/p/l811QPNk-L

Go Playground では UnixNano() 使えない？