blob: 53e9ccf387e19c55555f67047964a5b79269c9c0 [file] [log] [blame]
// run
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
type S struct{ x int }
func main() {
var i int
p := (*S)(unsafe.Pointer(uintptr(unsafe.Pointer(&i))))
v := uintptr(unsafe.Pointer(p))
// p is a pointer to a go:notinheap type. Like some C libraries,
// we stored an integer in that pointer. That integer just happens
// to be the address of i.
// v is also the address of i.
// p has a base type which is marked go:notinheap, so it
// should not be adjusted when the stack is copied.
recurse(100, p, v)
func recurse(n int, p *S, v uintptr) {
if n > 0 {
recurse(n-1, p, v)
if uintptr(unsafe.Pointer(p)) != v {
panic("adjusted notinheap pointer")