2020-01-19 12:05:15 -07:00
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// +build cgo,linux,amd64
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2020-01-14 10:50:43 -07:00
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// run -race
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// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"testing"
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"unsafe"
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)
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var buf [2]byte
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var x unsafe.Pointer = unsafe.Pointer(&buf[0])
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func main() {
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n := testing.AllocsPerRun(1000, func() {
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x = unsafe.Pointer(uintptr(x) + 1)
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x = unsafe.Pointer(uintptr(x) - 1)
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})
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if n > 0 {
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panic(fmt.Sprintf("too many allocations; want 0 got %f", n))
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}
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}
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