From 109be507377fe7f6e8819ac94041d3fdcdf6fd2f Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 15:18:25 +0200 Subject: Adding upstream version 1.19.8. Signed-off-by: Daniel Baumann --- test/fixedbugs/issue15281.go | 65 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 test/fixedbugs/issue15281.go (limited to 'test/fixedbugs/issue15281.go') diff --git a/test/fixedbugs/issue15281.go b/test/fixedbugs/issue15281.go new file mode 100644 index 0000000..390867c --- /dev/null +++ b/test/fixedbugs/issue15281.go @@ -0,0 +1,65 @@ +// 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. + +package main + +import "runtime" + +func main() { + { + x := inuse() + c := make(chan []byte, 10) + c <- make([]byte, 10<<20) + close(c) + f1(c, x) + } + { + x := inuse() + c := make(chan []byte, 10) + c <- make([]byte, 10<<20) + close(c) + f2(c, x) + } +} + +func f1(c chan []byte, start int64) { + for x := range c { + if delta := inuse() - start; delta < 9<<20 { + println("BUG: f1: after alloc: expected delta at least 9MB, got: ", delta) + println(x) + } + x = nil + if delta := inuse() - start; delta > 1<<20 { + println("BUG: f1: after alloc: expected delta below 1MB, got: ", delta) + println(x) + } + } +} + +func f2(c chan []byte, start int64) { + for { + x, ok := <-c + if !ok { + break + } + if delta := inuse() - start; delta < 9<<20 { + println("BUG: f2: after alloc: expected delta at least 9MB, got: ", delta) + println(x) + } + x = nil + if delta := inuse() - start; delta > 1<<20 { + println("BUG: f2: after alloc: expected delta below 1MB, got: ", delta) + println(x) + } + } +} + +func inuse() int64 { + runtime.GC() + var st runtime.MemStats + runtime.ReadMemStats(&st) + return int64(st.Alloc) +} -- cgit v1.2.3