golang里如何将一个struct指针转换成slice

package main

import "unsafe"
import "fmt"

func abc() {
type T struct {
a int
b int
c int
}

type SliceHeader struct {
addr uintptr
len  int
cap  int
}

t := &T{a: 1, b: 2, c: 3}
p := unsafe.Sizeof(*t)
println(int(p))

sl := &SliceHeader{
addr: uintptr(unsafe.Pointer(t)),
len:  int(p),
cap:  int(p),
}

b := *(*[]byte)(unsafe.Pointer(sl))
println(len(b))
fmt.Println(b)

b[0] = 7
b[4] = 5
b[8] = 8

fmt.Println(t)

}

func main() {
abc()
}