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 /* 25 * @test 26 * @summary Test that touching noaccess area in class ReservedHeapSpace results in SIGSEGV/ACCESS_VIOLATION 27 * @library /test/lib 28 * @modules java.base/jdk.internal.misc 29 * java.management 30 * @build sun.hotspot.WhiteBox 31 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 32 * @run main ReadFromNoaccessArea 33 */ 34 35 import jdk.test.lib.Platform; 36 import jdk.test.lib.process.ProcessTools; 37 import jdk.test.lib.process.OutputAnalyzer; 38 import sun.hotspot.WhiteBox; 39 40 public class ReadFromNoaccessArea { 41 42 public static void main(String args[]) throws Exception { 43 if (!Platform.is64bit()) { 44 System.out.println("ReadFromNoaccessArea tests is useful only on 64bit architecture. Passing silently."); 45 return; 46 } 47 48 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 49 "-Xbootclasspath/a:.", 50 "-XX:+UnlockDiagnosticVMOptions", 51 "-XX:+WhiteBoxAPI", 52 "-XX:+UseCompressedOops", 53 "-XX:HeapBaseMinAddress=33G", 54 "-XX:-CreateCoredumpOnCrash", 55 "-Xmx128m", 56 DummyClassWithMainTryingToReadFromNoaccessArea.class.getName()); 57 58 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 59 System.out.println("******* Printing stdout for analysis in case of failure *******"); 60 System.out.println(output.getStdout()); 61 System.out.println("******* Printing stderr for analysis in case of failure *******"); 62 System.out.println(output.getStderr()); 63 System.out.println("***************************************************************"); 64 if (output.getStdout() != null && output.getStdout().contains("WB_ReadFromNoaccessArea method is useless")) { 65 // Test conditions broken. There is no protected page in ReservedHeapSpace in these circumstances. Silently passing test. 66 return; 67 } 68 if (Platform.isWindows()) { 69 output.shouldContain("EXCEPTION_ACCESS_VIOLATION"); 70 } else if (Platform.isOSX()) { 71 output.shouldContain("SIGBUS"); 72 } else { 73 output.shouldContain("SIGSEGV"); 74 } 75 } 76 77 public static class DummyClassWithMainTryingToReadFromNoaccessArea { 78 79 // This method calls whitebox method reading from noaccess area 80 public static void main(String args[]) throws Exception { 81 WhiteBox.getWhiteBox().readFromNoaccessArea(); 82 throw new Exception("Call of readFromNoaccessArea succeeded! This is wrong. Crash expected. Test failed."); 83 } 84 } 85 86 }