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/issue46725.go | 48 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 test/fixedbugs/issue46725.go (limited to 'test/fixedbugs/issue46725.go') diff --git a/test/fixedbugs/issue46725.go b/test/fixedbugs/issue46725.go new file mode 100644 index 0000000..f6e443e --- /dev/null +++ b/test/fixedbugs/issue46725.go @@ -0,0 +1,48 @@ +// run + +// Copyright 2021 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 T [4]int // N.B., [4]int avoids runtime's tiny object allocator + +//go:noinline +func g(x []*T) ([]*T, []*T) { return x, x } + +func main() { + const Jenny = 8675309 + s := [10]*T{{Jenny}} + + done := make(chan struct{}) + runtime.SetFinalizer(s[0], func(p *T) { close(done) }) + + var h, _ interface{} = g(s[:]) + + if wait(done) { + panic("GC'd early") + } + + if h.([]*T)[0][0] != Jenny { + panic("lost Jenny's number") + } + + if !wait(done) { + panic("never GC'd") + } +} + +func wait(done <-chan struct{}) bool { + for i := 0; i < 10; i++ { + runtime.GC() + select { + case <-done: + return true + default: + } + } + return false +} -- cgit v1.2.3