From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- test/fixedbugs/issue15277.go | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 test/fixedbugs/issue15277.go (limited to 'test/fixedbugs/issue15277.go') diff --git a/test/fixedbugs/issue15277.go b/test/fixedbugs/issue15277.go new file mode 100644 index 0000000..af165f7 --- /dev/null +++ b/test/fixedbugs/issue15277.go @@ -0,0 +1,40 @@ +// run + +// 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. +// +build amd64 + +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) +} -- cgit v1.2.3