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