undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/io/Serializable/clearHandleTable/ClearHandleTable.java
+++ b/test/jdk/java/io/Serializable/clearHandleTable/ClearHandleTable.java
@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @bug 4332184
+ * @summary Ensure that ObjectOutputStream properly releases strong references
+ *          to written objects when reset() is called.
+ */
+
+import java.io.*;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+public class ClearHandleTable {
+    private static final int TIMES = 1000;
+
+    public static void main(String[] args) throws Exception {
+        final int nreps = 100;
+        ObjectOutputStream oout =
+            new ObjectOutputStream(new ByteArrayOutputStream());
+        List<WeakReference<?>> refs = new ArrayList<>(nreps);
+
+        for (int i = 0; i < nreps; i++) {
+            String str = new String("blargh");
+            oout.writeObject(str);
+            refs.add(new WeakReference<Object>(str));
+        }
+
+        oout.reset();
+
+        int count = 0;
+        for (int i=0; i<TIMES; i++) {
+            // relying on, possibly multiple, System.gc calls to clear weak references
+            System.gc();
+
+            Iterator<WeakReference<?>> itr = refs.iterator();
+            while(itr.hasNext()) {
+                WeakReference<?> ref = itr.next();
+                if (ref.get() == null) {
+                    itr.remove();
+                }
+            }
+            if (refs.isEmpty())
+                break;
+            Thread.sleep(20);
+            count++;
+            if (count % 10 == 0)
+                System.out.println("Looping " + count + " times");
+        }
+
+        if (!refs.isEmpty()) {
+            throw new Error("failed to garbage collect object");
+        }
+    }
+}