记录golang在panic时，在调用栈中输出的参数如何解读。

int -> 转换为16进制表示
int64 -> 转换为16进制表示
float32 -> 转换为16进制表示
float64 -> 转换为16进制表示
pointer -> 转换为16进制表示
array -> 内容元素的罗列
slice -> 底层数组的指针 + 长度 + 容量
string -> 底层字节数组 + 长度
struct -> 按照每个类型field的表示方式逐个罗列
interface -> 类型指针 + 内容指针

示例代码如下：

package main

import (
    "fmt"
    "runtime/debug"
)

type Person struct {
    name string
    age  int
}

func main() {

    v_int := 1
    v_int64 := int64(2)
    var v_float32 float32 = 1.2
    v_float64 := 2.3
    v_string := "haha"
    v_struct := Person{name: "abc", age: 49}
    v_pointer := &v_struct
    v_array := [3]int{1, 2, 3}
    v_slice := []int{4, 5, 6}
    start(v_int, v_int64, v_float32, v_float64, v_string, v_struct, v_pointer, v_array, v_slice, &v_struct)
}

func start(v_int int, v_int64 int64, v_float32 float32, v_float64 float64, v_string string, v_struct Person, v_pointer *Person, v_array [3]int, v_slice []int, v_interface interface{}) {
    fmt.Printf("v_int=%v\n", v_int)
    fmt.Printf("v_int64=%v\n", v_int64)
    fmt.Printf("v_float32=%v\n", v_float32)
    fmt.Printf("v_float64=%v\n", v_float64)
    fmt.Printf("v_string=%v\n", v_string)
    fmt.Printf("v_struct=%v\n", v_struct)
    fmt.Printf("v_pointer=%v, v_pointer=%p\n", v_pointer, v_pointer)
    fmt.Printf("v_array=%v\n", v_array)
    fmt.Printf("v_slice=%v\n", v_slice)
    fmt.Printf("v_interface=%v\n", v_interface)
    fmt.Printf("\n")
    printPrimitive(v_int, v_int64, v_float32, v_float64, v_string)
    printArray(v_array, v_slice)
    printObject(v_struct, v_pointer, v_interface)
}

func printPrimitive(v_int int, v_int64 int64, v_float32 float32, v_float64 float64, v_string string) {
    debug.PrintStack()
    fmt.Printf("\n")
}

func printArray(v_array [3]int, v_slice []int) {
    debug.PrintStack()
    fmt.Printf("\n")
}

func printObject(v_struct Person, v_pointer *Person, v_interface interface{}) {
    debug.PrintStack()
    fmt.Printf("\n")
}

执行结果

v_int=1
v_int64=2
v_float32=1.2
v_float64=2.3
v_string=haha
v_struct={abc 49}
v_pointer=&{abc 49}, v_pointer=0xc00000c060
v_array=[1 2 3]
v_slice=[4 5 6]
v_interface=&{abc 49}

goroutine 1 [running]:
runtime/debug.Stack(0x0, 0xc0000d8d10, 0x48ad51)
    /usr/lib/golang/src/runtime/debug/stack.go:24 +0x9d
runtime/debug.PrintStack()
    /usr/lib/golang/src/runtime/debug/stack.go:16 +0x22
main.printPrimitive(0x1, 0x2, 0x3f99999a, 0x4002666666666666, 0x4c1e6c, 0x4)
    /root/workspace/tmp/panic.go:45 +0x22
main.start(0x1, 0x2, 0x3f99999a, 0x4002666666666666, 0x4c1e6c, 0x4, 0x4c1d84, 0x3, 0x31, 0xc00000c060, ...)
    /root/workspace/tmp/panic.go:39 +0x689
main.main()
    /root/workspace/tmp/panic.go:24 +0x183

goroutine 1 [running]:
runtime/debug.Stack(0x1, 0x0, 0x0)
    /usr/lib/golang/src/runtime/debug/stack.go:24 +0x9d
runtime/debug.PrintStack()
    /usr/lib/golang/src/runtime/debug/stack.go:16 +0x22
main.printArray(0x1, 0x2, 0x3, 0xc0000181c0, 0x3, 0x3)
    /root/workspace/tmp/panic.go:50 +0x22
main.start(0x1, 0x2, 0x3f99999a, 0x4002666666666666, 0x4c1e6c, 0x4, 0x4c1d84, 0x3, 0x31, 0xc00000c060, ...)
    /root/workspace/tmp/panic.go:40 +0x6ce
main.main()
    /root/workspace/tmp/panic.go:24 +0x183

goroutine 1 [running]:
runtime/debug.Stack(0x1, 0x0, 0x0)
    /usr/lib/golang/src/runtime/debug/stack.go:24 +0x9d
runtime/debug.PrintStack()
    /usr/lib/golang/src/runtime/debug/stack.go:16 +0x22
main.printObject(0x4c1d84, 0x3, 0x31, 0xc00000c060, 0x49cfc0, 0xc00000c060)
    /root/workspace/tmp/panic.go:55 +0x22
main.start(0x1, 0x2, 0x3f99999a, 0x4002666666666666, 0x4c1e6c, 0x4, 0x4c1d84, 0x3, 0x31, 0xc00000c060, ...)
    /root/workspace/tmp/panic.go:41 +0x720
main.main()
    /root/workspace/tmp/panic.go:24 +0x183

Golang Panic的输出内容

Resources