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// +build cgo,linux,amd64
// run -race
// Copyright 2020 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.
package main
import (
"fmt"
"testing"
"unsafe"
)
var buf [2]byte
var x unsafe.Pointer = unsafe.Pointer(&buf[0])
func main() {
n := testing.AllocsPerRun(1000, func() {
x = unsafe.Pointer(uintptr(x) + 1)
x = unsafe.Pointer(uintptr(x) - 1)
})
if n > 0 {
panic(fmt.Sprintf("too many allocations; want 0 got %f", n))
}
}
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