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/sun/java2d/loops/CopyNegative.java

@@ -0,0 +1,103 @@
+/*
+ * 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 4188744
+ * @summary This test verifies that copyArea performs correctly for negative offset values.
+ *          The correct output shows that the text area is moved to the left and down,
+ *          leaving some garbage on the right and the top.
+ *          The incorrect copy would show the text area garbled and no text is legible.
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @run main/manual CopyNegative
+ */
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Graphics;
+import java.awt.Image;
+import java.awt.Panel;
+
+public class CopyNegative extends Panel {
+
+   private static final String INSTRUCTIONS = """
+       This test verifies that copyArea performs correctly for negative offset values.
+       The test draws text in an image, then copies the contents repeatedly.
+       The correct output shows that the text is moved to the left and down,
+       leaving some garbage on the top / right and some legible text at the bottom left.
+       The incorrect copy would show the whole text area garbled and no text is legible.
+       """;
+
+    public static void main(String[] argv) throws Exception {
+       PassFailJFrame.builder()
+            .title("CopyNegativeTest")
+            .instructions(INSTRUCTIONS)
+            .testUI(CopyNegative::createUI)
+            .testTimeOut(5)
+            .rows(10)
+            .columns(50)
+            .build()
+            .awaitAndCheck();
+    }
+
+    Image img;
+
+    static final int W = 200, H = 200;
+
+    static Frame createUI() {
+        Frame f = new Frame("CopyNegative");
+        f.add(new CopyNegative());
+        f.pack();
+        return f;
+    }
+
+    public Dimension getPreferredSize() {
+        return new Dimension(W, H);
+    }
+
+    private void doCopy() {
+        Graphics g = img.getGraphics();
+        g.setColor(Color.white);
+        g.fillRect(0, 0, W, H);
+        g.setColor(Color.black);
+        String text = "Some Text To Display, it is long enough to fill the entire display line.";
+        StringBuffer sb = new StringBuffer(text);
+
+        for (int i = 1; i < 50; i++) {
+            g.drawString(sb.toString(), 5,20 * i - 10);
+            sb.insert(0, Integer.toString(i));
+        }
+        for (int i = 0 ; i < 20 ; i++ ) {
+            g.copyArea(0, 0, W, H, -3, 3);
+        }
+    }
+
+    public void paint(Graphics g) {
+        img = createImage(W, H);
+        doCopy();
+        g.drawImage(img, 0, 0, this);
+    }
+
+}