Initial commit: Go 1.23 release state

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")
+	}
+}