go代码的调试---打印调用堆栈的实例

本文介绍如何打印调用堆栈进行go代码的调试。

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打印堆栈使用的runtime package中的Stack()函数

func Stack(buf []byte, all bool) int
Stack formats a stack trace of the calling goroutine into buf and returns the number of bytes written to buf. If all is true, Stack formats stack traces of all other goroutines into buf after the trace for the current goroutine.

example

package main
import (
    "runtime"
    "time"
    "fmt"
)
func main() {
    go power1()
    for {
        time.Sleep(time.Duration(1)*time.Minute)
    }
}


func power1(){
    var buf [1024]byte
    fmt.Println("power1.....")
    n := runtime.Stack(buf[:], true)
    fmt.Println(string(buf[:]), n)
}

输出结果:

power1.....
goroutine 5 [running]:
main.power1()
/home/lanyang/src/t.go:29 +0xec
created by main.main
/home/lanyang/src/t.go:14 +0x3c
goroutine 1 [sleep]:
time.Sleep(0xdf8475800)
/home/lanyang/src/t.go:59 +0x107
main.main()
/home/lanyang/src/t.go:17 +0x4f
303

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