8160943: skipImage() in JPEGImageReader class throws IIOException if we have gaps between markers in Jpeg image

Reviewed-by: prr, flar

jdk/src/java.desktop/share/classes/com/sun/imageio/plugins/jpeg/JPEGImageReader.java

@@ -561,6 +561,7 @@ public class JPEGImageReader extends ImageReader {
                         throw new IOException("skipImage : Found extra SOI"
                                 + " marker before getting to EOI");
                     case 0:
+                    case 255:
                     // markers which doesn't contain length data
                     case JPEG.RST0:
                     case JPEG.RST1:

jdk/test/javax/imageio/plugins/jpeg/ReadAllThumbnailsTest.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2004, 2016, 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     4958271 8160943
+ * @summary This test verifies that ImageReader.readAll() method is able to read
+ *          all the thumbnails present in the input source without throwing any
+ *          exception while reading through Jpeg data.
+ * @run     main ReadAllThumbnailsTest
+ */
+
+import java.util.Iterator;
+import java.io.File;
+import javax.imageio.IIOImage;
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+
+public class ReadAllThumbnailsTest {
+
+    public ReadAllThumbnailsTest() {
+
+        try {
+            ImageReader reader = null;
+
+            String fileName = "thumbimg.jpg";
+            String sep = System.getProperty("file.separator");
+            String dir = System.getProperty("test.src", ".");
+            String filePath = dir+sep+fileName;
+            System.out.println("Test file: " + filePath);
+            File f = new File(filePath);
+
+            ImageInputStream iis = ImageIO.createImageInputStream(f);
+            Iterator readerIt = ImageIO.getImageReaders(iis);
+            if (readerIt.hasNext()) {
+                reader = (ImageReader) readerIt.next();
+            }
+
+            if (reader == null) {
+                error("FAIL: Reader is not available for reading a " +
+                      "JPG image with thumbnails. Test Aborted !!");
+            }
+
+            reader.setInput(iis);
+
+            if (!reader.readerSupportsThumbnails()) {
+                error("FAIL: JPG Reader fails to support thumbnails."
+                        + " Test aborted !!");
+            }
+
+            int numThumbnails = reader.getNumThumbnails(0);
+            if (numThumbnails <= 0) {
+                error(" FAIL: Reader.getNumThumbnails() returns 0 when the " +
+                      "input image contains some thumbnails");
+            }
+            IIOImage iioImg = reader.readAll(0, null);
+            int thumbnailsRead = iioImg.getNumThumbnails();
+
+            if (numThumbnails == thumbnailsRead) {
+                System.out.println("PASS: Thumbnails are read properly by"
+                        + " ImageReader.readAll(index, readParam) ");
+            } else {
+                error("FAIL: Some of the thumbnails are not read" +
+                      " from the input source when calling" +
+                      " ImageReader.readAll(index, readParam) ");
+            }
+
+            iis = ImageIO.createImageInputStream(f);
+            reader.setInput(iis);
+
+            iioImg = null;
+            Iterator imgIter = reader.readAll(null);
+            if (imgIter.hasNext()) {
+                iioImg = (IIOImage) imgIter.next();
+                thumbnailsRead = iioImg.getNumThumbnails();
+
+                if (numThumbnails == thumbnailsRead) {
+                    System.out.println("PASS: Thumbnails are read properly by"
+                            + " ImageReader.readAll(Iter)");
+                } else {
+                    error("FAIL: Some of the thumbnails are not read " +
+                          "from the input source when calling"
+                            + " ImageReader.readAll(Iter)");
+                }
+            } else {
+                error("FAIL: ImageReader.readAll(Iter) fails to read the image"
+                        + " & thumbnails from the input source");
+            }
+
+        } catch (Exception e) {
+            error(" FAIL: The following exception is thrown by " +
+                  "ImageReader.readAll() method when input source contains " +
+                  "some thumbnails. Exception: " + e.toString());
+        }
+
+    }
+
+    public final void error(String mesg) {
+        throw new RuntimeException(mesg);
+    }
+
+    public static void main(String args[]) {
+        ReadAllThumbnailsTest test = new ReadAllThumbnailsTest();
+    }
+}