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/SkipConversionIfPossible.java

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+/*
+ * Copyright Amazon.com Inc. 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.AlphaComposite;
+import java.awt.Graphics2D;
+import java.awt.image.BufferedImage;
+import java.util.Arrays;
+
+import static java.awt.image.BufferedImage.TYPE_3BYTE_BGR;
+import static java.awt.image.BufferedImage.TYPE_4BYTE_ABGR;
+import static java.awt.image.BufferedImage.TYPE_4BYTE_ABGR_PRE;
+import static java.awt.image.BufferedImage.TYPE_INT_ARGB;
+import static java.awt.image.BufferedImage.TYPE_INT_ARGB_PRE;
+import static java.awt.image.BufferedImage.TYPE_INT_BGR;
+import static java.awt.image.BufferedImage.TYPE_INT_RGB;
+
+/**
+ * @test
+ * @bug 8297681
+ * @summary The blit TYPE_4BYTE_ABGR_PRE to TYPE_INT_ARGB_PRE should be "direct"
+ */
+public final class SkipConversionIfPossible {
+
+    private static final int SIZE = 256;
+
+    public static void main(String[] args) {
+        // Initial bug was in the TYPE_4BYTE_ABGR_PRE to TYPE_INT_ARGB_PRE blit.
+        // But I checked other blits just in case.
+        test(new int[]{TYPE_INT_ARGB_PRE, TYPE_4BYTE_ABGR_PRE});
+        test(new int[]{TYPE_INT_RGB, TYPE_INT_BGR, TYPE_3BYTE_BGR});
+        test(new int[]{TYPE_INT_ARGB, TYPE_4BYTE_ABGR});
+    }
+
+    private static void test(int[] types) {
+        for (int src : types) {
+            for (int dst : types) {
+                render(src, dst);
+            }
+        }
+    }
+
+    private static void render(int src, int dst) {
+        BufferedImage from = new BufferedImage(SIZE, SIZE, src);
+        for (int a = 0; a < SIZE; ++a) {
+            for (int c = 0; c < SIZE; ++c) {
+                // The data is intentionally broken for the argb_pre format, but
+                // it should be stored as is in dst if no conversion was done.
+                from.getRaster().setPixel(c, a, new int[]{c, c << 24, -c, a});
+            }
+        }
+        BufferedImage to = new BufferedImage(SIZE, SIZE, dst);
+        Graphics2D g = to.createGraphics();
+        g.setComposite(AlphaComposite.Src);
+        g.drawImage(from, 0, 0, null);
+        g.dispose();
+
+        for (int a = 0; a < SIZE; ++a) {
+            for (int c = 0; c < SIZE; ++c) {
+                int[] pixel1 = from.getRaster().getPixel(c, a, (int[]) null);
+                int[] pixel2 = to.getRaster().getPixel(c, a, (int[]) null);
+                if (!Arrays.equals(pixel1, pixel2)) {
+                    System.err.println(Arrays.toString(pixel1));
+                    System.err.println(Arrays.toString(pixel2));
+                    throw new RuntimeException();
+                }
+            }
+        }
+    }
+}