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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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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.
This commit is contained in:
russell@unturf.com 2026-03-26 17:11:57 -04:00
commit 0a580b313d
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186
test/jdk/sun/java2d/OpenGL/OpaqueDest.java Normal file
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/*
* Copyright (c) 2004, 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 6277977 6319663 8369335
* @key headful
* @requires (os.family != "mac")
* @summary Verifies that blending operations do not inadvertantly leave
* non-opaque alpha values in the framebuffer. Note that this test is
* intended to run on GraphicsConfigs that support a stored alpha channel
* (to verify the bug at hand), but it is also a useful for testing the
* compositing results on any configuration.
* @run main/othervm -Dsun.java2d.opengl=True OpaqueDest
* @run main/othervm OpaqueDest
*/
/*
* @test
* @bug 6277977 6319663
* @key headful
* @requires (os.family == "mac")
* @summary Verifies that blending operations do not inadvertantly leave
* non-opaque alpha values in the framebuffer. Note that this test is
* intended to run on GraphicsConfigs that support a stored alpha channel
* (to verify the bug at hand), but it is also a useful for testing the
* compositing results on any configuration.
* @run main/othervm -Dsun.java2d.opengl=True OpaqueDest
* @run main/othervm OpaqueDest
*/
import java.awt.AlphaComposite;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.Panel;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.io.File;
import javax.imageio.ImageIO;
public class OpaqueDest extends Canvas {
private static volatile Frame frame;
private static volatile OpaqueDest test;
private static final int W = 100, H = 100;
public void paint(Graphics g) {
Graphics2D g2d = (Graphics2D)g;
g2d.setColor(Color.red);
g2d.fillRect(0, 0, getWidth(), getHeight());
// This will clear the rectangle to black
g2d.setComposite(AlphaComposite.Clear);
g2d.fillRect(10, 10, 80, 80);
// If everything is working properly, then this will fill the
// rectangle with red again. Before this bug was fixed, the previous
// Clear operation would leave zero values in the destination's
// alpha channel (if present), and therefore a SrcIn operation
// would result in all-black.
g2d.setComposite(AlphaComposite.SrcIn);
g2d.fillRect(10, 10, 80, 80);
}
public Dimension getPreferredSize() {
return new Dimension(W, H);
}
static void createUI() {
test = new OpaqueDest();
frame = new Frame("OpenGL OpaqueDest Test");
Panel p = new Panel();
p.add(test);
frame.add(p);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) throws Exception {
Robot robot = new Robot();
EventQueue.invokeAndWait(OpaqueDest::createUI);
robot.waitForIdle();
robot.delay(2000);
BufferedImage capture = null;
try {
GraphicsConfiguration gc = frame.getGraphicsConfiguration();
if (gc.getColorModel() instanceof IndexColorModel) {
System.out.println("IndexColorModel detected: " +
"test considered PASSED");
return;
}
Point pt1 = test.getLocationOnScreen();
Rectangle rect = new Rectangle(pt1.x, pt1.y, W, H);
capture = robot.createScreenCapture(rect);
} finally {
if (frame != null) {
EventQueue.invokeAndWait(frame::dispose);
}
}
// Test all pixels (every one should be red)
for (int y = 0; y < W; y++) {
for (int x = 0; x < H; x++) {
int actual = capture.getRGB(x, y);
int expected = 0xffff0000;
if (!similar(actual, expected)) {
String msg = "Test failed at x="+x+" y="+y+
" (expected="+
Integer.toHexString(expected) +
" actual="+
Integer.toHexString(actual) +
")";
if ( ( x== 0) || ( x == W) || ( y == 0) || ( y == H)) {
System.err.println(msg);
} else {
saveImage(capture);
throw new RuntimeException(msg);
}
}
}
}
}
static boolean similar(int p1, int p2) {
int a1 = (p1 >> 24) & 0xff;
int r1 = (p1 >> 16) & 0xff;
int g1 = (p1 >> 8) & 0xff;
int b1 = p1 & 0xff;
int a2 = (p2 >> 24) & 0xff;
int r2 = (p2 >> 16) & 0xff;
int g2 = (p2 >> 8) & 0xff;
int b2 = p2 & 0xff;
int allowedDiff = 0x01; // tiny rounding error allowed.
return
(Math.abs(a1 - a2) <= allowedDiff) &&
(Math.abs(r1 - r2) <= allowedDiff) &&
(Math.abs(g1 - g2) <= allowedDiff) &&
(Math.abs(b1 - b2) <= allowedDiff);
}
static void saveImage(BufferedImage img) {
try {
File file = new File("capture.png");
ImageIO.write(img, "png", file);
} catch (Exception e) {
e.printStackTrace();
}
}
}