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-rw-r--r--test/fixedbugs/issue5493.go59
1 files changed, 59 insertions, 0 deletions
diff --git a/test/fixedbugs/issue5493.go b/test/fixedbugs/issue5493.go
new file mode 100644
index 0000000..2ee0398
--- /dev/null
+++ b/test/fixedbugs/issue5493.go
@@ -0,0 +1,59 @@
+// 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.
+
+package main
+
+import (
+ "runtime"
+ "sync"
+ "sync/atomic"
+ "time"
+)
+
+const N = 10
+var count int64
+
+func run() error {
+ f1 := func() {}
+ f2 := func() {
+ func() {
+ f1()
+ }()
+ }
+ runtime.SetFinalizer(&f1, func(f *func()) {
+ atomic.AddInt64(&count, -1)
+ })
+ go f2()
+ return nil
+}
+
+func main() {
+ // Does not work on 32-bits, or with gccgo, due to partially
+ // conservative GC.
+ // Try to enable when we have fully precise GC.
+ if runtime.GOARCH != "amd64" || runtime.Compiler == "gccgo" {
+ return
+ }
+ count = N
+ var wg sync.WaitGroup
+ wg.Add(N)
+ for i := 0; i < N; i++ {
+ go func() {
+ run()
+ wg.Done()
+ }()
+ }
+ wg.Wait()
+ for i := 0; i < 2*N; 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")
+ }
+}
+