1 // run 2 3 // Copyright 2016 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // issue 16948: make sure intrinsified atomic ops won't 8 // confuse the scheduler. 9 10 package main 11 12 import "sync/atomic" 13 14 func main() { 15 f() 16 } 17 18 var x int32 19 20 type T [10]int 21 var sink *T 22 23 func f() (t T) { 24 atomic.AddInt32(&x, 1) 25 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 26 return 27 } 28 29 //go:noinline 30 func g(a, b, c, d, e int, p *T) { 31 var t [10000]int // a large stack frame to trigger stack growing 32 _ = t 33 sink = p // force p (in caller) heap allocated 34 } 35
