1 /* 2 * Copyright (c) 2017, 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 TestConcurrentPhaseControlBasics 26 * @bug 8169517 27 * @summary Basic tests of WhiteBox concurrent GC phase control. 28 * @key gc 29 * @modules java.base 30 * @library /test/lib 31 * @build sun.hotspot.WhiteBox 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * @run main/othervm 34 * -Xbootclasspath/a:. 35 * -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI 36 * TestConcurrentPhaseControlBasics 37 */ 38 39 import sun.hotspot.WhiteBox; 40 41 public class TestConcurrentPhaseControlBasics { 42 43 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 44 45 private static boolean checkHasPhases(boolean supported) { 46 System.out.println("Expecting " + (supported ? "non-" : "") + "empty phase list"); 47 String[] phases = WB.getConcurrentGCPhases(); 48 return phases.length != 0; 49 } 50 51 private static boolean request() throws Exception { 52 WB.requestConcurrentGCPhase("UNKNOWN PHASE"); 53 return false; 54 } 55 56 private static boolean checkUnknownPhase() throws Exception { 57 System.out.println("Expecting IllegalArgumentException"); 58 try { 59 return request(); 60 } catch (IllegalArgumentException e) { 61 return true; 62 } 63 } 64 65 private static boolean checkSupported() throws Exception { 66 return checkHasPhases(true) && checkUnknownPhase(); 67 } 68 69 private static boolean checkUnsupportedRequest() throws Exception { 70 System.out.println("Expecting IllegalStateException"); 71 try { 72 return request(); 73 } catch (IllegalStateException e) { 74 return true; 75 } 76 } 77 78 private static boolean checkUnsupported() throws Exception { 79 return !checkHasPhases(false) && checkUnsupportedRequest(); 80 } 81 82 private static boolean check() throws Exception { 83 if (WB.supportsConcurrentGCPhaseControl()) { 84 return checkSupported(); 85 } else { 86 return checkUnsupported(); 87 } 88 } 89 90 public static void main(String[] args) throws Exception { 91 if (!check()) { 92 throw new RuntimeException("Test failed"); 93 } 94 } 95 }