test/jdk/java/io/readBytes/ReadBytesBounds.java
changeset 47216 71c04702a3d5
parent 7668 d4a77089c587
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/io/readBytes/ReadBytesBounds.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 1997, 2010, 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 4017728 4079849 6788196
+ * @summary Check for correct Array Bounds check in read of FileInputStream and
+ * RandomAccessFile
+ */
+
+import java.io.*;
+
+/*
+ * The test calls the read(byte buf[] , int off , int len) of
+ * FileInputStream with different values of off and len to see if the
+ * IndexOutOfBoundsException is thrown.  The read(...) method calls
+ * readBytes(...) in native code(io_util.c).  The read(...) method in
+ * RandomAccessFile also calls the same native method.  So one should
+ * see similar results.
+ */
+
+public class ReadBytesBounds {
+
+    static final FileInputStream fis;
+    static final RandomAccessFile raf;
+    static final byte[] b = new byte[32];
+
+    static {
+        try {
+            String dir = System.getProperty("test.src", ".");
+            File testFile = new File(dir, "input.txt");
+            fis = new FileInputStream(testFile);
+            raf = new RandomAccessFile(testFile , "r");
+        } catch (Throwable t) {
+            throw new Error(t);
+        }
+    }
+
+    public static void main(String argv[]) throws Throwable {
+        try {
+            testRead(-1, -1, false);
+            testRead(-1,  0, false);
+            testRead( 0, -1, false);
+            testRead( 0, 33, false);
+            testRead(33,  0, false);
+            testRead(33,  4, false);
+            testRead( 0, 32, true);
+            testRead(32,  0, true);
+            testRead(32,  4, false);
+            testRead( 4, 16, true);
+            testRead( 1, 31, true);
+            testRead( 0,  0, true);
+            testRead(31,  Integer.MAX_VALUE, false);
+            testRead( 0,  Integer.MAX_VALUE, false);
+            testRead(-1,  Integer.MAX_VALUE, false);
+            testRead(-4,  Integer.MIN_VALUE, false);
+            testRead( 0,  Integer.MIN_VALUE, false);
+        } finally {
+            fis.close();
+            raf.close();
+        }
+    }
+
+    static void testRead(int off, int len, boolean expected) throws Throwable {
+        System.err.printf("off=%d len=%d expected=%b%n", off, len, expected);
+        boolean result;
+        try {
+            fis.read(b, off, len);
+            raf.read(b, off, len);
+            result = true;
+        } catch (IndexOutOfBoundsException e) {
+            result = false;
+        }
+
+        if (result != expected) {
+            throw new RuntimeException
+                (String.format("Unexpected result off=%d len=%d expected=%b",
+                               off, len, expected));
+        }
+    }
+}