1 /*
   2  * Copyright (c) 2013, 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
  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  * @build com.oracle.java.testlibrary.* ReserveMemory
  31  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  32  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  33  * @run main ReserveMemory
  34  */
  35 
  36 import com.oracle.java.testlibrary.*;
  37 
  38 import sun.hotspot.WhiteBox;
  39 
  40 public class ReserveMemory {
  41   private static boolean isWindows() {
  42     return System.getProperty("os.name").toLowerCase().startsWith("win");
  43   }
  44 
  45   private static boolean isOsx() {
  46     return System.getProperty("os.name").toLowerCase().startsWith("mac");
  47   }
  48 
  49   public static void main(String args[]) throws Exception {
  50     if (args.length > 0) {
  51       WhiteBox.getWhiteBox().readReservedMemory();
  52 
  53       throw new Exception("Read of reserved/uncommitted memory unexpectedly succeeded, expected crash!");
  54     }
  55 
  56     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  57           "-Xbootclasspath/a:.",
  58           "-XX:+UnlockDiagnosticVMOptions",
  59           "-XX:+WhiteBoxAPI",
  60           "-XX:-TransmitErrorReport",
  61           "-Xmx32m",
  62           "ReserveMemory",
  63           "test");
  64 
  65     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  66     if (isWindows()) {
  67       output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
  68     } else if (isOsx()) {
  69       output.shouldContain("SIGBUS");
  70     } else {
  71       output.shouldContain("SIGSEGV");
  72     }
  73   }
  74 }