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