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 }