go issue16948 源码
golang issue16948 代码
文件路径：/test/fixedbugs/issue16948.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
}
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