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.

test/jdk/java/awt/im/memoryleak/InputContextMemoryLeakTest.java

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+/*
+ * Copyright (c) 2013, 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.
+ */
+
+import java.awt.FlowLayout;
+import java.awt.Robot;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.List;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JPanel;
+import javax.swing.JTextField;
+import javax.swing.SwingUtilities;
+import test.java.awt.regtesthelpers.Util;
+
+/*
+ @test
+ @key headful
+ @bug 7079260
+ @summary XInputContext leaks memory by needRecetXXIClient field
+ @author Petr Pchelko
+ @library ../../regtesthelpers
+ @build Util
+ @compile InputContextMemoryLeakTest.java
+ @run main/othervm -Xmx20M InputContextMemoryLeakTest
+ */
+public class InputContextMemoryLeakTest {
+
+    private static JFrame frame;
+    private static WeakReference<JTextField> text;
+    private static WeakReference<JPanel> p;
+    private static JButton button;
+
+    public static void init() throws Throwable {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                frame = new JFrame();
+                frame.setLayout(new FlowLayout());
+                JPanel p1 = new JPanel();
+                button = new JButton("Test");
+                p1.add(button);
+                frame.add(p1);
+                JTextField tf = new JTextField("Text");
+                text = new WeakReference<JTextField>(tf);
+                JPanel jp = new JPanel(new FlowLayout());
+                p = new WeakReference<JPanel>(jp);
+                jp.add(tf);
+                frame.add(jp);
+                frame.setBounds(500, 400, 200, 200);
+                frame.setVisible(true);
+            }
+        });
+
+        Util.focusComponent(text.get(), 500);
+        Util.clickOnComp(button, new Robot());
+        //References to objects testes for memory leak are stored in Util.
+        //Need to clean them
+        Util.cleanUp();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                // after this the JTextField as well as the JPanel
+                // are eligible to be GC'd
+                frame.remove(p.get());
+            }
+        });
+
+        Util.waitForIdle(null);
+        //After the next caret blink it automatically TextField references
+        JTextField tf = text.get();
+        if (tf != null) {
+            Thread.sleep(tf.getCaret().getBlinkRate() * 2);
+            tf = null; // allow to be GCed
+        }
+        Util.waitForIdle(null);
+
+        try {
+            assertGC();
+        } finally {
+            SwingUtilities.invokeAndWait(() -> frame.dispose());
+        }
+    }
+
+      public static void assertGC() throws Throwable {
+        List<byte[]> alloc = new ArrayList<byte[]>();
+        int size = 1024 * 10;
+        while (true) {
+            try {
+                alloc.add(new byte[size]);
+            } catch (OutOfMemoryError err) {
+                break;
+            }
+        }
+        alloc = null;
+        if (text.get() != null) {
+            throw new Exception("Test failed: JTextField was not collected");
+        }
+    }
+
+    public static void main(String args[]) throws Throwable {
+        init();
+    }
+}