mirror of
https://github.com/golang/go
synced 2024-11-15 00:10:28 -07:00
35 lines
703 B
Go
35 lines
703 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2016 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.
|
||
|
|
|
||
|
|
// issue 16948: make sure intrinsified atomic ops won't
|
||
|
|
// confuse the scheduler.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "sync/atomic"
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
f()
|
||
|
|
}
|
||
|
|
|
||
|
|
var x int32
|
||
|
|
|
||
|
|
type T [10]int
|
||
|
|
var sink *T
|
||
|
|
|
||
|
|
func f() (t T) {
|
||
|
|
atomic.AddInt32(&x, 1)
|
||
|
|
g(42, 42, 42, 42, 42, &t) // use int values that is invalid pointer to smash the stack slot of return value of runtime.newobject
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
//go:noinline
|
||
|
|
func g(a, b, c, d, e int, p *T) {
|
||
|
|
var t [10000]int // a large stack frame to trigger stack growing
|
||
|
|
_ = t
|
||
|
|
sink = p // force p (in caller) heap allocated
|
||
|
|
}
|