mirror of
https://github.com/golang/go
synced 2024-11-02 13:21:55 +00:00
fb69c67cad
The gc implementation has had precise GC for a while now, so we can enable these tests more broadly. Confirmed that they still fail with gccgo 10.2.1. Change-Id: Ic1c0394ab832024a99e34163c422941a3706e1a2 Reviewed-on: https://go-review.googlesource.com/c/go/+/281542 Trust: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
58 lines
1.1 KiB
Go
58 lines
1.1 KiB
Go
// run
|
|
|
|
// Copyright 2013 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 defers do not prevent garbage collection.
|
|
|
|
package main
|
|
|
|
import (
|
|
"runtime"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
)
|
|
|
|
var sink func()
|
|
|
|
func main() {
|
|
// Does not work with gccgo, due to partially conservative GC.
|
|
// Try to enable when we have fully precise GC.
|
|
if runtime.Compiler == "gccgo" {
|
|
return
|
|
}
|
|
N := 10
|
|
count := int32(N)
|
|
var wg sync.WaitGroup
|
|
wg.Add(N)
|
|
for i := 0; i < N; i++ {
|
|
go func() {
|
|
defer wg.Done()
|
|
v := new(string)
|
|
f := func() {
|
|
if *v != "" {
|
|
panic("oops")
|
|
}
|
|
}
|
|
if *v != "" {
|
|
// let the compiler think f escapes
|
|
sink = f
|
|
}
|
|
runtime.SetFinalizer(v, func(p *string) {
|
|
atomic.AddInt32(&count, -1)
|
|
})
|
|
defer f()
|
|
}()
|
|
}
|
|
wg.Wait()
|
|
for i := 0; i < 3; i++ {
|
|
time.Sleep(10 * time.Millisecond)
|
|
runtime.GC()
|
|
}
|
|
if count != 0 {
|
|
println(count, "out of", N, "finalizer are not called")
|
|
panic("not all finalizers are called")
|
|
}
|
|
}
|