1 /*
   2  * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8001071
  27  * @summary Add simple range check into VM implemenation of Unsafe access methods
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  */
  32 
  33 import jdk.test.lib.process.ProcessTools;
  34 import jdk.test.lib.process.OutputAnalyzer;
  35 import jdk.test.lib.Platform;
  36 
  37 import jdk.internal.misc.Unsafe;
  38 
  39 public class RangeCheck {
  40 
  41     public static void main(String args[]) throws Exception {
  42         if (!Platform.isDebugBuild()) {
  43             System.out.println("Testing assert which requires a debug build. Passing silently.");
  44             return;
  45         }
  46 
  47         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  48                 true,
  49                 "-Xmx128m",
  50                 "--add-exports=java.base/jdk.internal.misc=ALL-UNNAMED",
  51                 "-XX:-CreateCoredumpOnCrash",
  52                 "-XX:-InlineUnsafeOps", // The compiler intrinsics doesn't have the assert
  53                 DummyClassWithMainRangeCheck.class.getName());
  54 
  55         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  56         output.shouldMatch("assert\\(byte_offset < p_size\\) failed: Unsafe access: offset \\d+ > object's size \\d+");
  57     }
  58 
  59     public static class DummyClassWithMainRangeCheck {
  60         public static void main(String args[]) throws Exception {
  61             Unsafe unsafe = Unsafe.getUnsafe();
  62             unsafe.getReference(new DummyClassWithMainRangeCheck(), Short.MAX_VALUE);
  63         }
  64     }
  65 }