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/awt/Canvas/NoEventsLeakTest.java
+++ b/test/jdk/java/awt/Canvas/NoEventsLeakTest.java
@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 1999, 2024, 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 4250354
+ * @key headful
+ * @summary tests that JNI global refs are cleaned up correctly
+ * @run main/timeout=600 NoEventsLeakTest
+ */
+
+import java.awt.Canvas;
+import java.awt.EventQueue;
+import java.awt.Frame;
+
+public class NoEventsLeakTest extends Frame {
+    static final int nLoopCount = 1000;
+
+    private static void initialize() {
+        NoEventsLeakTest app = new NoEventsLeakTest();
+        boolean result = app.run();
+        if (result) {
+            throw new RuntimeException("Memory leak in Component");
+        }
+        System.out.println("Test Passed");
+    }
+
+    public boolean run() {
+        setSize(10, 10);
+        addNotify();
+        for (int i = 0; i < nLoopCount; i++) {
+            Canvas panel = new TestCanvas();
+            add(panel, 0);
+            remove(0);
+            panel = null;
+            System.gc();
+        }
+        try {
+            Thread.currentThread().sleep(1000);
+        } catch (InterruptedException e) {
+        }
+        System.gc();
+        System.out.println("Checking");
+        return ((TestCanvas.created - TestCanvas.finalized) > 800);
+    }
+
+    public static void main(String[] args) throws Exception {
+        EventQueue.invokeAndWait(NoEventsLeakTest::initialize);
+    }
+}
+
+class TestCanvas extends Canvas {
+    static int finalized = 0;
+    static int created = 0;
+    static final int nLoopPrint = 100;
+
+    public TestCanvas() {
+        if (created % nLoopPrint == 0) {
+            System.out.println("Created " + getClass() + " " + created);
+        }
+        created++;
+    }
+
+    @SuppressWarnings("removal")
+    protected void finalize() {
+        try {
+            super.finalize();
+            if (finalized % nLoopPrint == 0) {
+                System.out.println("Finalized " + getClass() + " " + finalized);
+            }
+            finalized++;
+        } catch (Throwable t) {
+            System.out.println("Exception in " + getClass() + ": " + t);
+        }
+    }
+}