1 /* 2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 /* @test 25 * @summary Test selective barrier enabling works, by aggressively compiling HelloWorld with combinations 26 * of barrier flags 27 * @library /test/lib 28 * @run main/othervm TestSelectiveBarrierFlags -Xint 29 * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:TieredStopAtLevel=1 30 * @run main/othervm TestSelectiveBarrierFlags -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:+ShenandoahVerifyOptoBarriers 31 */ 32 33 import java.util.*; 34 import java.util.concurrent.*; 35 import jdk.test.lib.process.ProcessTools; 36 import jdk.test.lib.process.OutputAnalyzer; 37 38 public class TestSelectiveBarrierFlags { 39 40 public static void main(String[] args) throws Exception { 41 String[][] opts = { 42 new String[]{ "ShenandoahKeepAliveBarrier" }, 43 new String[]{ "ShenandoahWriteBarrier" }, 44 new String[]{ "ShenandoahReadBarrier" }, 45 // StoreValRead+SATB are actually compatible, but we need to protect against 46 // StorveValEnqueue+SATB. TODO: Make it better. 47 new String[]{ "ShenandoahSATBBarrier", "ShenandoahStoreValReadBarrier", "ShenandoahStoreValEnqueueBarrier" }, 48 new String[]{ "ShenandoahCASBarrier" }, 49 new String[]{ "ShenandoahAcmpBarrier" }, 50 new String[]{ "ShenandoahCloneBarrier" }, 51 }; 52 53 int size = 1; 54 for (String[] l : opts) { 55 size *= (l.length + 1); 56 } 57 58 ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors()); 59 60 for (int c = 0; c < size; c++) { 61 int t = c; 62 63 List<String> conf = new ArrayList<>(); 64 conf.addAll(Arrays.asList(args)); 65 conf.add("-Xmx128m"); 66 conf.add("-XX:+UnlockDiagnosticVMOptions"); 67 conf.add("-XX:+UnlockExperimentalVMOptions"); 68 conf.add("-XX:+UseShenandoahGC"); 69 conf.add("-XX:ShenandoahGCHeuristics=passive"); 70 71 StringBuilder sb = new StringBuilder(); 72 for (String[] l : opts) { 73 // Make a choice which flag to select from the group. 74 // Zero means no flag is selected from the group. 75 int choice = t % (l.length + 1); 76 for (int e = 0; e < l.length; e++) { 77 conf.add("-XX:" + ((choice == (e + 1)) ? "+" : "-") + l[e]); 78 } 79 t = t / (l.length + 1); 80 } 81 82 conf.add("TestSelectiveBarrierFlags$Test"); 83 84 pool.submit(() -> { 85 try { 86 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(conf.toArray(new String[0])); 87 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 88 output.shouldHaveExitValue(0); 89 } catch (Exception e) { 90 e.printStackTrace(); 91 System.exit(1); 92 } 93 }); 94 } 95 96 pool.shutdown(); 97 pool.awaitTermination(1, TimeUnit.HOURS); 98 } 99 100 public static class Test { 101 public static void main(String... args) { 102 System.out.println("HelloWorld"); 103 } 104 } 105 106 }