1 /*
   2  * Copyright (c) 2013, 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  * @summary Test that touching noaccess area in class ReservedHeapSpace results in SIGSEGV/ACCESS_VIOLATION
  27  * @library /testlibrary /testlibrary/whitebox
  28  * @build ReadFromNoaccessArea
  29  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  30  * @run main ReadFromNoaccessArea
  31  */
  32 
  33 import com.oracle.java.testlibrary.*;
  34 import sun.hotspot.WhiteBox;
  35 
  36 public class ReadFromNoaccessArea {
  37 
  38   public static void main(String args[]) throws Exception {
  39     if (!Platform.is64bit()) {
  40       System.out.println("ReadFromNoaccessArea tests is useful only on 64bit architecture. Passing silently.");
  41       return;
  42     }
  43 
  44     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  45           "-Xbootclasspath/a:.",
  46           "-XX:+UnlockDiagnosticVMOptions",
  47           "-XX:+WhiteBoxAPI",
  48           "-XX:+UseCompressedOops",
  49           "-XX:HeapBaseMinAddress=33G",
  50           DummyClassWithMainTryingToReadFromNoaccessArea.class.getName());
  51 
  52     OutputAnalyzer output = new OutputAnalyzer(pb.start());
  53     System.out.println("******* Printing stdout for analysis in case of failure *******");
  54     System.out.println(output.getStdout());
  55     System.out.println("******* Printing stderr for analysis in case of failure *******");
  56     System.out.println(output.getStderr());
  57     System.out.println("***************************************************************");
  58     if (output.getStdout() != null && output.getStdout().contains("WB_ReadFromNoaccessArea method is useless")) {
  59       // Test conditions broken. There is no protected page in ReservedHeapSpace in these circumstances. Silently passing test.
  60       return;
  61     }
  62     if (Platform.isWindows()) {
  63       output.shouldContain("EXCEPTION_ACCESS_VIOLATION");
  64     } else if (Platform.isOSX()) {
  65       output.shouldContain("SIGBUS");
  66     } else {
  67       output.shouldContain("SIGSEGV");
  68     }
  69   }
  70 
  71   public static class DummyClassWithMainTryingToReadFromNoaccessArea {
  72 
  73     // This method calls whitebox method reading from noaccess area
  74     public static void main(String args[]) throws Exception {
  75       WhiteBox.getWhiteBox().readFromNoaccessArea();
  76       throw new Exception("Call of readFromNoaccessArea succeeded! This is wrong. Crash expected. Test failed.");
  77     }
  78   }
  79 
  80 }