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