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/Scrollbar/ListScrollbarTest.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 1998, 2025, 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 4029465
+ * @summary Win95 Multiselect List doesn't display scrollbar
+ * @key headful
+ * @run main ListScrollbarTest
+ */
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.EventQueue;
+import java.awt.Frame;
+import java.awt.List;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Robot;
+
+public class ListScrollbarTest {
+
+    private static final Color BG_COLOR = Color.RED;
+    private static Robot robot;
+    private static Frame frame;
+    private static List list;
+    private static int counter = 0;
+    private static volatile Rectangle listBounds;
+
+    public static void main(String[] args) throws Exception {
+        try {
+            EventQueue.invokeAndWait(ListScrollbarTest::createAndShowUI);
+            test();
+        } finally {
+            EventQueue.invokeAndWait(() -> {
+                if (frame != null) {
+                    frame.dispose();
+                }
+            });
+        }
+    }
+
+    private static void test() throws Exception {
+        robot = new Robot();
+        robot.waitForIdle();
+        robot.delay(500);
+
+        EventQueue.invokeAndWait(() -> {
+            Point locationOnScreen = list.getLocationOnScreen();
+            Dimension size = list.getSize();
+            listBounds = new Rectangle(locationOnScreen, size);
+        });
+
+        Point point = new Point(listBounds.x + listBounds.width - 5,
+                listBounds.y + listBounds.height / 2);
+
+
+        for (int i = 0; i < 4; i++) {
+            scrollbarCheck(point, false);
+            addListItem();
+        }
+        scrollbarCheck(point, true);
+    }
+
+    public static boolean areColorsSimilar(Color c1, Color c2, int tolerance) {
+        return Math.abs(c1.getRed() - c2.getRed()) <= tolerance
+                && Math.abs(c1.getGreen() - c2.getGreen()) <= tolerance
+                && Math.abs(c1.getBlue() - c2.getBlue()) <= tolerance;
+    }
+
+    private static void scrollbarCheck(Point point, boolean isScrollbarExpected) {
+        Color pixelColor = robot.getPixelColor(point.x, point.y);
+        boolean areColorsSimilar = areColorsSimilar(BG_COLOR, pixelColor, 5);
+
+        if (isScrollbarExpected && areColorsSimilar) {
+            throw new RuntimeException(("""
+                    Scrollbar is expected, but pixel color \
+                    is similar to the background color
+                    %s pixel color
+                    %s bg color""")
+                    .formatted(pixelColor, BG_COLOR));
+        }
+
+        if (!isScrollbarExpected && !areColorsSimilar) {
+            throw new RuntimeException(("""
+                    Scrollbar is not expected, but pixel color \
+                    is not similar to the background color
+                    %s pixel color
+                    %s bg color""")
+                    .formatted(pixelColor, BG_COLOR));
+        }
+    }
+
+    private static void addListItem() throws Exception {
+        EventQueue.invokeAndWait(() -> {
+            counter++;
+            System.out.println("Adding list item " + counter);
+            list.add("List Item " + counter);
+            frame.validate();
+        });
+        robot.waitForIdle();
+        robot.delay(150);
+    }
+
+    private static void createAndShowUI() {
+        frame = new Frame("ListScrollbarTest");
+        list = new List(3, true);
+        list.setBackground(BG_COLOR);
+
+        // do not draw border around items, it can affect screen capture
+        list.setFocusable(false);
+
+        frame.add(list);
+
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
+}