hno.Origin().(func(typ unsafe.Pointer) unsafe.Pointer) 断言失败

[bmslaravel]

代码来自：https://github.com/fengyoulin/hookingo/wiki/%E8%8E%B7%E5%8F%96%E9%97%AD%E5%8C%85%E7%B1%BB%E5%9E%8B%EF%BC%88%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0%EF%BC%89

[bmslaravel]

func fno(typ unsafe.Pointer) unsafe.Pointer {
	t := reflect.TypeOf(0)
	(*(*[2]unsafe.Pointer)(unsafe.Pointer(&t)))[1] = typ // 相当于反射了闭包类型
	println(t.String())
	fn, ok := hno.Origin().(func(typ unsafe.Pointer) unsafe.Pointer)
	if ok {
		return fn(typ) // 调用原runtime.newobject
	}
	println("ok", ok) // ok false
}

[bmslaravel]

不知道什么原因在 go1.17 版本和 go1.20.3 版本中 windows10 系统下一直在 hno.Origin().(func(typ unsafe.Pointer) unsafe.Pointer) 导致无法调用原runtime.newobject，因此这种的处理了下，以便正常看到闭包的结构：

package main

import (
	"github.com/fengyoulin/hookingo"
	"reflect"
	"unsafe"
)

var hno hookingo.Hook

//go:linkname newobject runtime.newobject
func newobject(typ unsafe.Pointer) unsafe.Pointer

//go:linkname newobject2 runtime.mallocgc
func newobject2(size uintptr, typ unsafe.Pointer, b bool) unsafe.Pointer

func fno(typ unsafe.Pointer) unsafe.Pointer {
	t := reflect.TypeOf(0)
	(*(*[2]unsafe.Pointer)(unsafe.Pointer(&t)))[1] = typ // 相当于反射了闭包类型
	println(t.String())
	//fn, ok := hno.Origin().(func(typ unsafe.Pointer) unsafe.Pointer)
	//if ok {
	//	return fn(typ) // 调用原runtime.newobject
	//}
	//println("ok", ok)
	//os.Exit(1)
	println(*(*uintptr)(unsafe.Pointer(typ)))
	return newobject2(*(*uintptr)(unsafe.Pointer(typ)), typ, true)
}

// 创建一个闭包，make closure
func mc(start int, text string) func() string {
	return func() string {
		l := len(text)
		s := start % l
		r := text[s:]
		start++
		return r
	}
}

func main() {
	var err error
	hno, err = hookingo.Apply(newobject, fno) // 应用钩子，替换函数
	if err != nil {
		panic(err)
	}
	f := mc(10, "hello, closure!")
	println(f())
}

[bmslaravel]

windows10，go1.20.3 版本下的

PS D:\workspace\helium> go run -gcflags -l .
int
8
struct { F uintptr; text string; start *int }
32
sure!