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