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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-28 13:14:23 +0000
commit73df946d56c74384511a194dd01dbe099584fd1a (patch)
treefd0bcea490dd81327ddfbb31e215439672c9a068 /test/mallocfin.go
parentInitial commit. (diff)
downloadgolang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.tar.xz
golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.zip
Adding upstream version 1.16.10.upstream/1.16.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'test/mallocfin.go')
-rw-r--r--test/mallocfin.go77
1 files changed, 77 insertions, 0 deletions
diff --git a/test/mallocfin.go b/test/mallocfin.go
new file mode 100644
index 0000000..be6d79b
--- /dev/null
+++ b/test/mallocfin.go
@@ -0,0 +1,77 @@
+// run
+
+// Copyright 2009 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 basic operation of finalizers.
+
+package main
+
+import (
+ "runtime"
+ "time"
+)
+
+const N = 250
+
+type A struct {
+ b *B
+ n int
+}
+
+type B struct {
+ n int
+}
+
+var i int
+var nfinal int
+var final [N]int
+
+// the unused return is to test finalizers with return values
+func finalA(a *A) (unused [N]int) {
+ if final[a.n] != 0 {
+ println("finalA", a.n, final[a.n])
+ panic("fail")
+ }
+ final[a.n] = 1
+ return
+}
+
+func finalB(b *B) {
+ if final[b.n] != 1 {
+ println("finalB", b.n, final[b.n])
+ panic("fail")
+ }
+ final[b.n] = 2
+ nfinal++
+}
+
+func nofinalB(b *B) {
+ panic("nofinalB run")
+}
+
+func main() {
+ runtime.GOMAXPROCS(4)
+ for i = 0; i < N; i++ {
+ b := &B{i}
+ a := &A{b, i}
+ c := new(B)
+ runtime.SetFinalizer(c, nofinalB)
+ runtime.SetFinalizer(b, finalB)
+ runtime.SetFinalizer(a, finalA)
+ runtime.SetFinalizer(c, nil)
+ }
+ for i := 0; i < N; i++ {
+ runtime.GC()
+ runtime.Gosched()
+ time.Sleep(1e6)
+ if nfinal >= N*8/10 {
+ break
+ }
+ }
+ if nfinal < N*8/10 {
+ println("not enough finalizing:", nfinal, "/", N)
+ panic("fail")
+ }
+}