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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
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//go:build amd64
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// Copyright 2016 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 "runtime"
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type big [10 << 20]byte
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func f(x *big, start int64) {
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if delta := inuse() - start; delta < 9<<20 {
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println("after alloc: expected delta at least 9MB, got: ", delta)
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}
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runtime.KeepAlive(x)
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x = nil
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if delta := inuse() - start; delta > 1<<20 {
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println("after drop: expected delta below 1MB, got: ", delta)
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}
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x = new(big)
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if delta := inuse() - start; delta < 9<<20 {
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println("second alloc: expected delta at least 9MB, got: ", delta)
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}
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runtime.KeepAlive(x)
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}
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func main() {
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x := inuse()
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f(new(big), x)
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}
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func inuse() int64 {
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runtime.GC()
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var st runtime.MemStats
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runtime.ReadMemStats(&st)
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return int64(st.Alloc)
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}
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