From 43a123c1ae6613b3efeed291fa552ecd909d3acf Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:23:18 +0200 Subject: Adding upstream version 1.20.14. Signed-off-by: Daniel Baumann --- test/gc2.go | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 test/gc2.go (limited to 'test/gc2.go') diff --git a/test/gc2.go b/test/gc2.go new file mode 100644 index 0000000..2f8eb9b --- /dev/null +++ b/test/gc2.go @@ -0,0 +1,45 @@ +// +build !nacl,!js +// run + +// Copyright 2011 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. + +// Test that buffered channels are garbage collected properly. +// An interesting case because they have finalizers and used to +// have self loops that kept them from being collected. +// (Cyclic data with finalizers is never finalized, nor collected.) + +package main + +import ( + "fmt" + "os" + "runtime" +) + +func main() { + const N = 10000 + st := new(runtime.MemStats) + memstats := new(runtime.MemStats) + runtime.ReadMemStats(st) + for i := 0; i < N; i++ { + c := make(chan int, 10) + _ = c + if i%100 == 0 { + for j := 0; j < 4; j++ { + runtime.GC() + runtime.Gosched() + runtime.GC() + runtime.Gosched() + } + } + } + + runtime.ReadMemStats(memstats) + obj := int64(memstats.HeapObjects - st.HeapObjects) + if obj > N/5 { + fmt.Println("too many objects left:", obj) + os.Exit(1) + } +} -- cgit v1.2.3