1 /*
   2  * Copyright (c) 2014, 2015, 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
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  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
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  23 
  24 /*
  25  * @test
  26  * @bug 8001071
  27  * @summary Add simple range check into VM implemenation of Unsafe access methods
  28  * @library /testlibrary
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  */
  32 
  33 import jdk.test.lib.*;
  34 import jdk.internal.misc.Unsafe;
  35 
  36 public class RangeCheck {
  37 
  38     public static void main(String args[]) throws Exception {
  39         if (!Platform.isDebugBuild()) {
  40             System.out.println("Testing assert which requires a debug build. Passing silently.");
  41             return;
  42         }
  43 
  44         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  45                 true,
  46                 "-Xmx32m",
  47                 "-XaddExports:java.base/jdk.internal.misc=ALL-UNNAMED",
  48                 "-XX:-TransmitErrorReport",
  49                 "-XX:-CreateCoredumpOnCrash",
  50                 "-XX:-InlineUnsafeOps", // The compiler intrinsics doesn't have the assert
  51                 DummyClassWithMainRangeCheck.class.getName());
  52 
  53         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  54         output.shouldMatch("assert\\(byte_offset < p_size\\) failed: Unsafe access: offset \\d+ > object's size \\d+");
  55     }
  56 
  57     public static class DummyClassWithMainRangeCheck {
  58         public static void main(String args[]) throws Exception {
  59             Unsafe unsafe = Utils.getUnsafe();
  60             unsafe.getObject(new DummyClassWithMainRangeCheck(), Short.MAX_VALUE);
  61         }
  62     }
  63 }