1 /* 2 * Copyright (c) 2014, 2016, 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 /** 26 * @test 27 * @bug 8031320 28 * @summary Verify that rtm locking is used for stack locks before 29 * inflation and after it used for inflated locks. 30 * @library /test/lib / 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 * @build sun.hotspot.WhiteBox 34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 35 * sun.hotspot.WhiteBox$WhiteBoxPermission 36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 37 * -XX:+WhiteBoxAPI 38 * compiler.rtm.locking.TestUseRTMAfterLockInflation 39 */ 40 41 package compiler.rtm.locking; 42 43 import compiler.testlibrary.rtm.AbortProvoker; 44 import compiler.testlibrary.rtm.AbortType; 45 import compiler.testlibrary.rtm.RTMLockingStatistics; 46 import compiler.testlibrary.rtm.RTMTestBase; 47 import compiler.testlibrary.rtm.predicate.SupportedCPU; 48 import compiler.testlibrary.rtm.predicate.SupportedOS; 49 import compiler.testlibrary.rtm.predicate.SupportedVM; 50 import jdk.test.lib.Asserts; 51 import jdk.test.lib.process.OutputAnalyzer; 52 import jdk.test.lib.cli.CommandLineOptionTest; 53 import jdk.test.lib.cli.predicate.AndPredicate; 54 55 import java.util.List; 56 57 /** 58 * Test verifies that RTM is used after lock inflation by executing compiled 59 * method with RTM-based lock elision using stack lock first, then that lock 60 * is inflated and the same compiled method invoked again. 61 * 62 * Compiled method invoked {@code AbortProvoker.DEFAULT_ITERATIONS} times before 63 * lock inflation and the same amount of times after inflation. 64 * As a result total locks count should be equal to 65 * {@code 2 * AbortProvoker.DEFAULT_ITERATIONS}. 66 * It is a pretty strict assertion which could fail if some retriable abort 67 * happened: it could be {@code AbortType.RETRIABLE} or 68 * {@code AbortType.MEM_CONFLICT}, but unfortunately abort can has both these 69 * reasons simultaneously. In order to avoid false negative failures related 70 * to incorrect aborts counting, -XX:RTMRetryCount=0 is used. 71 */ 72 public class TestUseRTMAfterLockInflation extends CommandLineOptionTest { 73 private static final long EXPECTED_LOCKS 74 = 2L * AbortProvoker.DEFAULT_ITERATIONS; 75 76 private TestUseRTMAfterLockInflation() { 77 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM())); 78 } 79 80 @Override 81 protected void runTestCases() throws Throwable { 82 AbortProvoker provoker = AbortType.XABORT.provoker(); 83 long totalLocksCount = 0; 84 85 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 86 provoker, 87 "-XX:+UseRTMForStackLocks", 88 "-XX:RTMTotalCountIncrRate=1", 89 "-XX:RTMRetryCount=0", 90 "-XX:+PrintPreciseRTMLockingStatistics", 91 Test.class.getName(), 92 AbortType.XABORT.toString()); 93 94 outputAnalyzer.shouldHaveExitValue(0); 95 96 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 97 provoker.getMethodWithLockName(), outputAnalyzer.getOutput()); 98 99 Asserts.assertEQ(statistics.size(), 2, 100 "VM output should contain two rtm locking statistics entries " 101 + "for method " + provoker.getMethodWithLockName()); 102 103 for (RTMLockingStatistics s : statistics) { 104 totalLocksCount += s.getTotalLocks(); 105 } 106 107 Asserts.assertEQ(totalLocksCount, 108 TestUseRTMAfterLockInflation.EXPECTED_LOCKS, 109 "Total lock count should be greater or equal to " 110 + TestUseRTMAfterLockInflation.EXPECTED_LOCKS); 111 } 112 113 public static class Test { 114 /** 115 * Usage: 116 * Test <provoker type> 117 */ 118 public static void main(String args[]) throws Throwable { 119 Asserts.assertGT(args.length, 0, 120 "AbortType name is expected as first argument."); 121 122 AbortProvoker provoker 123 = AbortType.lookup(Integer.valueOf(args[0])).provoker(); 124 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 125 AbortProvoker.verifyMonitorState(provoker, false /*deflated*/); 126 provoker.forceAbort(); 127 } 128 provoker.inflateMonitor(); 129 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) { 130 AbortProvoker.verifyMonitorState(provoker, true /*inflated*/); 131 provoker.forceAbort(); 132 } 133 } 134 } 135 136 public static void main(String args[]) throws Throwable { 137 new TestUseRTMAfterLockInflation().test(); 138 } 139 }