1 /*
   2  * Copyright (c) 2013, 2020, 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 // Aix commits on touch, so this test won't work.
  25 /*
  26  * @test
  27  * @key regression
  28  * @bug 8012015
  29  * @requires !(os.family == "aix")
  30  * @summary Make sure reserved (but uncommitted) memory is not accessible
  31  * @library /test/lib
  32  * @modules java.base/jdk.internal.misc
  33  *          java.management
  34  * @build sun.hotspot.WhiteBox
  35  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  36  * @run main ReserveMemory
  37  */
  38 
  39 import jdk.test.lib.process.ProcessTools;
  40 import jdk.test.lib.process.OutputAnalyzer;
  41 import jdk.test.lib.Platform;
  42 
  43 import sun.hotspot.WhiteBox;
  44 
  45 public class ReserveMemory {
  46   public static void main(String args[]) throws Exception {
  47     if (args.length > 0) {
  48       WhiteBox.getWhiteBox().readReservedMemory();
  49 
  50       throw new Exception("Read of reserved/uncommitted memory unexpectedly succeeded, expected crash!");
  51     }
  52 
  53     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  54           "-Xbootclasspath/a:.",
  55           "-XX:+UnlockDiagnosticVMOptions",
  56           "-XX:+WhiteBoxAPI",
  57           "-XX:-CreateCoredumpOnCrash",
  58           "-Xmx128m",
  59           "ReserveMemory",
  60           "test");
  61 
  62     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  63     if (Platform.isWindows()) {
  64       output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
  65     } else if (Platform.isOSX()) {
  66       output.shouldContain("SIGBUS");
  67     } else {
  68       output.shouldContain("SIGSEGV");
  69     }
  70   }
  71 }