1 /*
   2  * Copyright (c) 2014, 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
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  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8001071
  27  * @summary Add simple range check into VM implemenation of Unsafe access methods
  28  * @library /testlibrary
  29  */
  30 
  31 import com.oracle.java.testlibrary.*;
  32 import sun.misc.Unsafe;
  33 
  34 public class RangeCheck {
  35 
  36     public static void main(String args[]) throws Exception {
  37         if (!Platform.isDebugBuild()) {
  38             System.out.println("Testing assert which requires a debug build. Passing silently.");
  39             return;
  40         }
  41 
  42         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  43                 true,
  44                 "-Xmx32m",
  45                 "-XX:-TransmitErrorReport",
  46                 "-XX:-InlineUnsafeOps", // The compiler intrinsics doesn't have the assert
  47                 "-XX:-CreateCoredumpOnCrash",
  48                 DummyClassWithMainRangeCheck.class.getName());
  49 
  50         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  51         output.shouldMatch("assert\\(byte_offset < p_size\\) failed: Unsafe access: offset \\d+ > object's size \\d+");
  52     }
  53 
  54     public static class DummyClassWithMainRangeCheck {
  55         public static void main(String args[]) throws Exception {
  56             Unsafe unsafe = Utils.getUnsafe();
  57             unsafe.getObject(new DummyClassWithMainRangeCheck(), Short.MAX_VALUE);
  58         }
  59     }
  60 }