1 /*
   2  * Copyright (c) 2013, 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
  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  * @key regression
  27  * @bug 8012015
  28  * @summary Make sure reserved (but uncommitted) memory is not accessible
  29  * @library /testlibrary /test/lib
  30  * @modules java.base/sun.misc
  31  *          java.management
  32  * @build ReserveMemory
  33  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  34  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  35  * @run main ReserveMemory
  36  */
  37 
  38 import jdk.test.lib.*;
  39 
  40 import sun.hotspot.WhiteBox;
  41 
  42 public class ReserveMemory {
  43   private static boolean isWindows() {
  44     return System.getProperty("os.name").toLowerCase().startsWith("win");
  45   }
  46 
  47   private static boolean isOsx() {
  48     return System.getProperty("os.name").toLowerCase().startsWith("mac");
  49   }
  50 
  51   public static void main(String args[]) throws Exception {
  52     if (args.length > 0) {
  53       WhiteBox.getWhiteBox().readReservedMemory();
  54 
  55       throw new Exception("Read of reserved/uncommitted memory unexpectedly succeeded, expected crash!");
  56     }
  57 
  58     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  59           "-Xbootclasspath/a:.",
  60           "-XX:+UnlockDiagnosticVMOptions",
  61           "-XX:+WhiteBoxAPI",
  62           "-XX:-TransmitErrorReport",
  63           "-XX:-CreateCoredumpOnCrash",
  64           "-Xmx32m",
  65           "ReserveMemory",
  66           "test");
  67 
  68     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  69     if (isWindows()) {
  70       output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
  71     } else if (isOsx()) {
  72       output.shouldContain("SIGBUS");
  73     } else {
  74       output.shouldContain("SIGSEGV");
  75     }
  76   }
  77 }