I don't understand what you are trying to say.
Note that your code uses unsafe.Pointer in an unsupported way. See
https://golang.org/pkg/unsafe/#Pointer .
Ian
On Thu, Mar 30, 2017 at 7:08 AM, 刘桂祥 <liuguixiang...@gmail.com> wrote:
> package main
>
> import (
> "fmt"
> "runtime"
> "unsafe"
> )
>
> func main() {
> var m runtime.MemStats
>
> runtime.ReadMemStats(&m)
> println(m.HeapObjects, m.Mallocs)
>
> runtime.GC()
>
> runtime.ReadMemStats(&m)
> println(m.HeapObjects, m.Mallocs)
>
> runtime.GC()
>
> runtime.ReadMemStats(&m)
> println(m.HeapObjects, m.Mallocs)
>
> p := foo()
> runtime.ReadMemStats(&m)
> println(m.HeapObjects, m.Mallocs)
>
> runtime.GC()
>
> runtime.ReadMemStats(&m)
> println(m.HeapObjects, m.Mallocs)
> println(*((*int)(unsafe.Pointer(p))))
>
> foo1()
>
> println(*((*int)(unsafe.Pointer(p))))
> }
>
> func foo() uintptr {
> i := new(int)
> *i = 1000
> if false {
> fmt.Sprintf("%v", i)
> }
>
> return uintptr(unsafe.Pointer(i))
> }
> func foo1() uintptr {
> i := new(int)
> *i = 2000
> if false {
> fmt.Sprintf("%v", i)
> }
>
> return uintptr(unsafe.Pointer(i))
> }
>
>
>
> --
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