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/lang/Object/FinalizationOption.java
+++ b/test/jdk/java/lang/Object/FinalizationOption.java
@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2021, 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 8276422
+ * @summary add command-line option to disable finalization
+ * @run main/othervm                         FinalizationOption yes
+ * @run main/othervm --finalization=enabled  FinalizationOption yes
+ * @run main/othervm --finalization=disabled FinalizationOption no
+ */
+public class FinalizationOption {
+    static volatile boolean finalizerWasCalled = false;
+
+    @SuppressWarnings("deprecation")
+    protected void finalize() {
+        finalizerWasCalled = true;
+    }
+
+    static void create() {
+        new FinalizationOption();
+    }
+
+    /**
+     * Checks whether the finalizer thread is or is not running. The finalizer thread
+     * is a thread in the root thread group whose named is "Finalizer".
+     * @param expected boolean indicating whether a finalizer thread should exist
+     * @return boolean indicating whether the expectation was met
+     */
+    static boolean checkFinalizerThread(boolean expected) {
+        ThreadGroup root = Thread.currentThread().getThreadGroup();
+        for (ThreadGroup parent = root;
+             parent != null;
+             root = parent, parent = root.getParent())
+            ;
+
+        int nt = 100;
+        Thread[] threads;
+        while (true) {
+            threads = new Thread[nt];
+            nt = root.enumerate(threads);
+            if (nt < threads.length)
+                break;
+            threads = new Thread[nt + 100];
+        }
+
+        Thread ft = null;
+        for (int i = 0; i < nt; i++) {
+            if ("Finalizer".equals(threads[i].getName())) {
+                ft = threads[i];
+                break;
+            }
+        }
+
+        String msg = (ft == null) ? "(none)" : ft.toString();
+        boolean passed = (ft != null) == expected;
+        System.out.printf("Finalizer thread.    Expected: %s   Actual: %s   %s%n",
+            expected, msg, passed ? "Passed." : "FAILED!");
+        return passed;
+    }
+
+    /**
+     * Checks whether there was a call to the finalize() method.
+     * @param expected boolean whether finalize() should be called
+     * @return boolean indicating whether the expecation was met
+     */
+    static boolean checkFinalizerCalled(boolean expected) {
+        create();
+        for (int i = 0; i < 100; i++) {
+            System.gc();
+            try {
+                Thread.sleep(10L);
+            } catch (InterruptedException ie) {
+                Thread.currentThread().interrupt();
+            }
+            if (finalizerWasCalled) {
+                break;
+            }
+        }
+        boolean passed = (expected == finalizerWasCalled);
+        System.out.printf("Call to finalize().  Expected: %s   Actual: %s   %s%n",
+            expected, finalizerWasCalled,
+            passed ? "Passed." : "FAILED!");
+        return passed;
+    }
+
+    public static void main(String[] args) {
+        boolean finalizationEnabled = switch (args[0]) {
+            case "yes" -> true;
+            case "no"  -> false;
+            default -> {
+                throw new AssertionError("usage: FinalizationOption yes|no");
+            }
+        };
+
+        boolean threadPass = checkFinalizerThread(finalizationEnabled);
+        boolean calledPass = checkFinalizerCalled(finalizationEnabled);
+
+        if (!threadPass || !calledPass)
+            throw new AssertionError("Test failed.");
+    }
+}