| // run -race |
| |
| //go:build cgo && linux && amd64 |
| |
| // 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)) |
| } |
| } |
