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/image/MemoryLeakTest/MemoryLeakTest.java

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+/*
+ * Copyright (c) 1998, 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 4078566 6658398
+ * @requires (os.family == "linux")
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @summary Test for a memory leak in Image.
+ * @run main/manual MemoryLeakTest
+ */
+
+import java.awt.Color;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+
+public class MemoryLeakTest {
+    private static final String INSTRUCTIONS =
+        """
+         Do the following steps on Unix platforms.
+         Maximize and minimize the Memory Leak Test window.
+         Execute the following after minimize.
+             ps -al | egrep -i 'java|PPID'
+         Examine the size of the process under SZ.
+         Maximize and minimize the Memory Leak Test window again.
+         Execute the following after minimize.
+             ps -al | egrep -i 'java|PPID'
+         Examine the size of the process under SZ.
+         If the two SZ values are the same, plus or minus one,
+         then click Pass, else click Fail.
+        """;
+
+    public static void main(String[] args) throws Exception {
+        PassFailJFrame
+            .builder()
+            .title("MemoryLeakTest Instructions")
+            .instructions(INSTRUCTIONS)
+            .rows(15)
+            .columns(40)
+            .testUI(MemoryLeak::new)
+            .build()
+            .awaitAndCheck();
+    }
+}
+
+class MemoryLeak extends Frame implements ComponentListener {
+    private Image osImage;
+
+    public MemoryLeak() {
+        super("Memory Leak Test");
+        setSize(200, 200);
+        addComponentListener(this);
+    }
+
+    public static void main(String[] args) {
+        new MemoryLeak().start();
+    }
+
+    public void start() {
+        setVisible(true);
+    }
+
+    public void paint(Graphics g) {
+        if (osImage != null) {
+            g.drawImage(osImage, 0, 0, this);
+        }
+    }
+
+    public void update(Graphics g) {
+        paint(g);
+    }
+
+    public void componentResized(ComponentEvent e) {
+        Image oldimage = osImage;
+        osImage = createImage(getSize().width, getSize().height);
+        Graphics g = osImage.getGraphics();
+        if (oldimage != null) {
+            g.drawImage(oldimage, 0, 0, getSize().width, getSize().height, this);
+            oldimage.flush();
+        } else {
+            g.setColor(Color.blue);
+            g.drawLine(0, 0, getSize().width, getSize().height);
+        }
+        g.dispose();
+    }
+
+    public void componentMoved(ComponentEvent e) {}
+
+    public void componentShown(ComponentEvent e) {
+        osImage = createImage(getSize().width, getSize().height);
+        Graphics g = osImage.getGraphics();
+        g.setColor(Color.blue);
+        g.drawLine(0, 0, getSize().width, getSize().height);
+        g.dispose();
+    }
+
+    public void componentHidden(ComponentEvent e) {}
+
+}