panic信息的2种打印方式

package main

import (
    "flag"
    "fmt"
    "runtime"
    "runtime/debug"

    "github.com/astaxie/beego/logs"
)

func main() {
    run := ""
    flag.StringVar(&run, "run", "", "run")
    flag.Parse()
    switch run {
    case "recover1":
        recover1()
    case "recover2":
        recover2()
    default:
        fmt.Printf("-run=%v is forbidden\n", run)
    }
}

func recover1() {
    defer func() {
        if r := recover(); r != nil {
            logs.Error("panic err: %#v FullStack: %s",
                r, string(debug.Stack()))
        }
    }()
    panic("one")
}

func recover2() {
    defer func() {
        if x := recover(); x != nil {
            logs.Error("panic  err: %#v, FullStack:%v", x, FullStack())
        }
    }()
    panic("two")
}

func FullStack() string {
    var buf [2 << 11]byte
    runtime.Stack(buf[:], true)
    return string(buf[:])
}

// 两者基本没有区别

输出：

go run debug-recover/main.go -run=recover1
2022/07/15 10:47:45.756 [E]  panic err: "one" FullStack: goroutine 1 [running]:
runtime/debug.Stack(0xc000111d40, 0x68ff20, 0x73dfa0)
    /usr/local/go/src/runtime/debug/stack.go:24 +0x9f
main.recover1.func1()
    /home/dev/work/debug-recover/main.go:30 +0x5b
panic(0x68ff20, 0x73dfa0)
    /usr/local/go/src/runtime/panic.go:965 +0x1b9
main.recover1()
    /home/dev/work/debug-recover/main.go:33 +0x5b
main.main()
    /home/dev/work/debug-recover/main.go:18 +0x1ad


 $ go run debug-recover/main.go -run=recover2
2022/07/15 10:47:39.548 [E]  panic  err: "two", FullStack:goroutine 1 [running]:
main.FullStack(...)
    /home/dev/work/debug-recover/main.go:47
main.recover2.func1()
    /home/dev/work/debug-recover/main.go:39 +0x90
panic(0x68ff20, 0x73dfb0)
    /usr/local/go/src/runtime/panic.go:965 +0x1b9
main.recover2()
    /home/dev/work/debug-recover/main.go:42 +0x5b
main.main()
    /home/dev/work/debug-recover/main.go:20 +0x1a6