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master
test/fixedbugs/issue16948.go
34 строки
703 B
Cherry Zhang
cmd/compile: fix scheduling of memory-producing tuple ops
01 сен 2016, 17:25
01 сен 2016, 17:25
1c53a1b
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// 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 }