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 * @test 26 * @bug 8031320 27 * @summary Verify that if we use RTMDeopt, then deoptimization 28 * caused by reason other then rtm_state_change will reset 29 * method's RTM state. And if we don't use RTMDeopt, then 30 * RTM state remain the same after such deoptimization. 31 * @library /test/lib / 32 * @modules java.base/jdk.internal.misc 33 * java.management 34 * @requires vm.rtm.cpu & vm.rtm.compiler 35 * @build sun.hotspot.WhiteBox 36 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 37 * sun.hotspot.WhiteBox$WhiteBoxPermission 38 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 39 * -XX:+WhiteBoxAPI 40 * compiler.rtm.locking.TestRTMAfterNonRTMDeopt 41 */ 42 43 package compiler.rtm.locking; 44 45 import compiler.testlibrary.rtm.AbortProvoker; 46 import compiler.testlibrary.rtm.CompilableTest; 47 import compiler.testlibrary.rtm.RTMLockingStatistics; 48 import compiler.testlibrary.rtm.RTMTestBase; 49 import jdk.internal.misc.Unsafe; 50 import jdk.test.lib.Asserts; 51 import jdk.test.lib.process.OutputAnalyzer; 52 import jdk.test.lib.cli.CommandLineOptionTest; 53 54 import java.util.List; 55 56 /** 57 * To verify that with +UseRTMDeopt method's RTM state will be 58 * changed to ProfileRTM on deoptimization unrelated to 59 * rtm_state_change following sequence of events is used: 60 * <pre> 61 * 62 * rtm state ^ 63 * | 64 * UseRTM | ******| ****** 65 * | | 66 * ProfileRTM |******| |*****| 67 * | | | | 68 * 0-------|-----|-----|---------------------> time 69 * | | \ force abort 70 * | | 71 * | \ force deoptimization 72 * | 73 * \ force xabort 74 * </pre> 75 * When xabort is forced by native method call method should 76 * change it's state to UseRTM, because we use RTMAbortRatio=100 77 * and low RTMLockingThreshold, so at this point actual abort 78 * ratio will be below 100% and there should be enough lock 79 * attempts to recompile method without RTM profiling. 80 */ 81 public class TestRTMAfterNonRTMDeopt { 82 private static final int ABORT_THRESHOLD = 1000; 83 private static final String RANGE_CHECK = "range_check"; 84 85 protected void runTestCases() throws Throwable { 86 verifyRTMAfterDeopt(false, false); 87 verifyRTMAfterDeopt(true, false); 88 89 verifyRTMAfterDeopt(false, true); 90 verifyRTMAfterDeopt(true, true); 91 } 92 93 private void verifyRTMAfterDeopt(boolean useStackLock, 94 boolean useRTMDeopt) throws Throwable { 95 CompilableTest test = new Test(); 96 String logFile = String.format("rtm_%s_stack_lock_%s_deopt.xml", 97 (useStackLock ? "use" : "no"), (useRTMDeopt ? "use" : "no")); 98 99 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest( 100 logFile, 101 test, 102 "-XX:CompileThreshold=1", 103 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks", 104 useStackLock), 105 CommandLineOptionTest.prepareBooleanFlag("UseRTMDeopt", 106 useRTMDeopt), 107 "-XX:RTMAbortRatio=100", 108 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold", 109 TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD), 110 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold", 111 TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD / 2L), 112 "-XX:RTMTotalCountIncrRate=1", 113 "-XX:+PrintPreciseRTMLockingStatistics", 114 Test.class.getName(), 115 Boolean.toString(!useStackLock) 116 ); 117 118 outputAnalyzer.shouldHaveExitValue(0); 119 120 int traps = RTMTestBase.firedRTMStateChangeTraps(logFile); 121 122 if (useRTMDeopt) { 123 Asserts.assertEQ(traps, 2, "Two uncommon traps with " 124 + "reason rtm_state_change should be fired."); 125 } else { 126 Asserts.assertEQ(traps, 0, "No uncommon traps with " 127 + "reason rtm_state_change should be fired."); 128 } 129 130 int rangeCheckTraps = RTMTestBase.firedUncommonTraps(logFile, 131 TestRTMAfterNonRTMDeopt.RANGE_CHECK); 132 133 Asserts.assertEQ(rangeCheckTraps, 1, 134 "One range_check uncommon trap should be fired."); 135 136 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString( 137 test.getMethodWithLockName(), outputAnalyzer.getOutput()); 138 139 int expectedStatEntries = (useRTMDeopt ? 4 : 2); 140 141 Asserts.assertEQ(statistics.size(), expectedStatEntries, 142 String.format("VM output should contain %d RTM locking " 143 + "statistics entries.", expectedStatEntries)); 144 } 145 146 public static class Test implements CompilableTest { 147 // Following field have to be static in order to avoid escape analysis. 148 @SuppressWarnings("UnsuedDeclaration") 149 private static int field = 0; 150 private static final int ITERATIONS = 10000; 151 private static final int RANGE_CHECK_AT = ITERATIONS / 2; 152 private static final Unsafe UNSAFE = Unsafe.getUnsafe(); 153 private final Object monitor = new Object(); 154 155 @Override 156 public String getMethodWithLockName() { 157 return this.getClass().getName() + "::forceAbort"; 158 } 159 160 @Override 161 public String[] getMethodsToCompileNames() { 162 return new String[] { getMethodWithLockName() }; 163 } 164 165 public void forceAbort(int a[], boolean abort) { 166 try { 167 synchronized(monitor) { 168 a[0]++; 169 if (abort) { 170 Test.field = Test.UNSAFE.pageSize(); 171 } 172 } 173 } catch (Throwable t) { 174 // suppress any throwables 175 } 176 } 177 178 /** 179 * Usage: 180 * Test <inflate monitor> 181 */ 182 public static void main(String args[]) throws Throwable { 183 Test t = new Test(); 184 185 boolean shouldBeInflated = Boolean.valueOf(args[0]); 186 if (shouldBeInflated) { 187 AbortProvoker.inflateMonitor(t.monitor); 188 } 189 190 int tmp[] = new int[1]; 191 192 for (int i = 0; i < Test.ITERATIONS; i++ ) { 193 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated); 194 if (i == Test.RANGE_CHECK_AT) { 195 t.forceAbort(new int[0], false); 196 } else { 197 boolean isThreshold 198 = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD); 199 boolean isThresholdPlusRange 200 = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD 201 + Test.RANGE_CHECK_AT); 202 t.forceAbort(tmp, isThreshold || isThresholdPlusRange); 203 } 204 } 205 } 206 } 207 208 public static void main(String args[]) throws Throwable { 209 new TestRTMAfterNonRTMDeopt().runTestCases(); 210 } 211 } 212