1 /* 2 * Copyright (c) 2014, 2015, 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 UseRTMLockEliding option could be applied to 29 * specified method and that such method will not be deoptimized 30 * on high abort ratio. 31 * @library /testlibrary /../../test/lib /compiler/testlibrary 32 * @modules java.base/sun.misc 33 * java.management 34 * @build TestUseRTMLockElidingOption 35 * @run main ClassFileInstaller sun.hotspot.WhiteBox 36 * sun.hotspot.WhiteBox$WhiteBoxPermission 37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 38 * -XX:+WhiteBoxAPI TestUseRTMLockElidingOption 39 */ 40 41 import java.util.List; 42 import com.oracle.java.testlibrary.*; 43 import com.oracle.java.testlibrary.cli.CommandLineOptionTest; 44 import com.oracle.java.testlibrary.cli.predicate.AndPredicate; 45 import rtm.*; 46 import rtm.predicate.SupportedCPU; 47 import rtm.predicate.SupportedVM; 48 49 /** 50 * Test verifies that method tagged with option <i>UseRTMLockElidingOption</i> 51 * will use RTM-based lock elision, but will be never deoptimized with 52 * <i>rtm_state_change reason</i>. 53 * Test invokes compiled method and checks that no deoptimization with 54 * <i>rtm_state_change</i> reason had happened and that that VM output 55 * contains RTM locking statistics for compiled method and that total locks 56 * count equals to method's invocations. 57 * Since last assert is pretty strict, test uses -XX:RTMRetryCount=0 in order 58 * to avoid issue with retriable aborts described in 59 * {@link TestUseRTMAfterLockInflation}. 60 */ 61 public class TestUseRTMLockElidingOption extends CommandLineOptionTest { 62 private TestUseRTMLockElidingOption() { 63 super(new AndPredicate(new SupportedCPU(), new SupportedVM())); 64 } 65 66 @Override 67 public void runTestCases() throws Throwable { 68 verifyOption(false); 69 verifyOption(true); 70 } 71 72 public void verifyOption(boolean useStackLock) throws Throwable { 73 AbortProvoker provoker = AbortType.XABORT.provoker(); 74 String logFileName = String.format("rtm_deopt_%s_stack_lock.xml", 75 (useStackLock ? "use" : "no")); 76 String methodOption = String.format("-XX:CompileCommand=option," + 77 "%s,UseRTMLockEliding", provoker.getMethodWithLockName()); 78 79 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 80 logFileName, 81 provoker, 82 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 83 useStackLock), 84 methodOption, 85 "-XX:RTMTotalCountIncrRate=1", 86 "-XX:RTMRetryCount=0", 87 "-XX:+UseRTMDeopt", 88 "-XX:+PrintPreciseRTMLockingStatistics", 89 provoker.getClass().getName(), 90 AbortType.XABORT.toString(), 91 Boolean.toString(!useStackLock) 92 ); 93 94 outputAnalyzer.shouldHaveExitValue(0); 95 96 int firedTraps = RTMTestBase.firedRTMStateChangeTraps(logFileName); 97 98 Asserts.assertEQ(firedTraps, 0, 99 "Method deoptimization with rtm_state_change is unexpected"); 100 101 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 102 provoker.getMethodWithLockName(), outputAnalyzer.getOutput()); 103 104 Asserts.assertEQ(statistics.size(), 1, 105 "VM output should contain exactly one RTM locking " 106 + "statistics entry for method " 107 + provoker.getMethodWithLockName()); 108 109 RTMLockingStatistics lock = statistics.get(0); 110 111 Asserts.assertEQ(lock.getTotalLocks(), AbortProvoker.DEFAULT_ITERATIONS, 112 "Expected to get total locks count equal to total amount of " 113 + "lock attempts."); 114 } 115 116 public static void main(String args[]) throws Throwable { 117 new TestUseRTMLockElidingOption().test(); 118 } 119 }