mirror of
https://github.com/golang/go
synced 2024-11-22 20:40:03 -07:00
b2fd76ab8d
Most of the test cases in the test directory use the new go:build syntax already. Convert the rest. In general, try to place the build constraint line below the test directive comment in more places. For #41184. For #60268. Change-Id: I11c41a0642a8a26dc2eda1406da908645bbc005b Cq-Include-Trybots: luci.golang.try:gotip-linux-386-longtest,gotip-linux-amd64-longtest,gotip-windows-amd64-longtest Reviewed-on: https://go-review.googlesource.com/c/go/+/536236 Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
42 lines
851 B
Go
42 lines
851 B
Go
// run
|
|
|
|
//go:build amd64
|
|
|
|
// 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.
|
|
|
|
package main
|
|
|
|
import "runtime"
|
|
|
|
type big [10 << 20]byte
|
|
|
|
func f(x *big, start int64) {
|
|
if delta := inuse() - start; delta < 9<<20 {
|
|
println("after alloc: expected delta at least 9MB, got: ", delta)
|
|
}
|
|
runtime.KeepAlive(x)
|
|
x = nil
|
|
if delta := inuse() - start; delta > 1<<20 {
|
|
println("after drop: expected delta below 1MB, got: ", delta)
|
|
}
|
|
x = new(big)
|
|
if delta := inuse() - start; delta < 9<<20 {
|
|
println("second alloc: expected delta at least 9MB, got: ", delta)
|
|
}
|
|
runtime.KeepAlive(x)
|
|
}
|
|
|
|
func main() {
|
|
x := inuse()
|
|
f(new(big), x)
|
|
}
|
|
|
|
func inuse() int64 {
|
|
runtime.GC()
|
|
var st runtime.MemStats
|
|
runtime.ReadMemStats(&st)
|
|
return int64(st.Alloc)
|
|
}
|