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 /**
26 * @test
27 * @bug 8031320
28 * @summary Verify that if we use RTMDeopt, then deoptimization
29 * caused by reason other then rtm_state_change will reset
30 * method's RTM state. And if we don't use RTMDeopt, then
31 * RTM state remain the same after such deoptimization.
32 * @library /test/lib /
33 * @modules java.base/jdk.internal.misc
34 * java.management
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 compiler.testlibrary.rtm.predicate.SupportedCPU;
50 import compiler.testlibrary.rtm.predicate.SupportedVM;
51 import jdk.internal.misc.Unsafe;
52 import jdk.test.lib.Asserts;
53 import jdk.test.lib.process.OutputAnalyzer;
54 import jdk.test.lib.unsafe.UnsafeHelper;
55 import jdk.test.lib.cli.CommandLineOptionTest;
56 import jdk.test.lib.cli.predicate.AndPredicate;
57
58 import java.util.List;
59
60 /**
61 * To verify that with +UseRTMDeopt method's RTM state will be
62 * changed to ProfileRTM on deoptimization unrelated to
63 * rtm_state_change following sequence of events is used:
64 * <pre>
65 *
66 * rtm state ^
67 * |
68 * UseRTM | ******| ******
69 * | |
70 * ProfileRTM |******| |*****|
71 * | | | |
72 * 0-------|-----|-----|---------------------> time
73 * | | \ force abort
74 * | |
75 * | \ force deoptimization
76 * |
77 * \ force xabort
78 * </pre>
79 * When xabort is forced by native method call method should
80 * change it's state to UseRTM, because we use RTMAbortRatio=100
81 * and low RTMLockingThreshold, so at this point actual abort
82 * ratio will be below 100% and there should be enough lock
83 * attempts to recompile method without RTM profiling.
84 */
85 public class TestRTMAfterNonRTMDeopt extends CommandLineOptionTest {
86 private static final int ABORT_THRESHOLD = 1000;
87 private static final String RANGE_CHECK = "range_check";
88
89 private TestRTMAfterNonRTMDeopt() {
90 super(new AndPredicate(new SupportedCPU(), new SupportedVM()));
91 }
92
93 @Override
94 protected void runTestCases() throws Throwable {
95 verifyRTMAfterDeopt(false, false);
96 verifyRTMAfterDeopt(true, false);
97
98 verifyRTMAfterDeopt(false, true);
99 verifyRTMAfterDeopt(true, true);
100 }
101
102 private void verifyRTMAfterDeopt(boolean useStackLock,
103 boolean useRTMDeopt) throws Throwable {
104 CompilableTest test = new Test();
105 String logFile = String.format("rtm_%s_stack_lock_%s_deopt.xml",
106 (useStackLock ? "use" : "no"), (useRTMDeopt ? "use" : "no"));
107
108 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
109 logFile,
110 test,
111 "-XX:CompileThreshold=1",
112 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
113 useStackLock),
114 CommandLineOptionTest.prepareBooleanFlag("UseRTMDeopt",
115 useRTMDeopt),
116 "-XX:RTMAbortRatio=100",
117 CommandLineOptionTest.prepareNumericFlag("RTMAbortThreshold",
118 TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD),
119 CommandLineOptionTest.prepareNumericFlag("RTMLockingThreshold",
120 TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD / 2L),
121 "-XX:RTMTotalCountIncrRate=1",
122 "-XX:+PrintPreciseRTMLockingStatistics",
123 Test.class.getName(),
124 Boolean.toString(!useStackLock)
125 );
126
127 outputAnalyzer.shouldHaveExitValue(0);
128
129 int traps = RTMTestBase.firedRTMStateChangeTraps(logFile);
130
131 if (useRTMDeopt) {
132 Asserts.assertEQ(traps, 2, "Two uncommon traps with "
133 + "reason rtm_state_change should be fired.");
134 } else {
135 Asserts.assertEQ(traps, 0, "No uncommon traps with "
136 + "reason rtm_state_change should be fired.");
137 }
138
139 int rangeCheckTraps = RTMTestBase.firedUncommonTraps(logFile,
140 TestRTMAfterNonRTMDeopt.RANGE_CHECK);
141
142 Asserts.assertEQ(rangeCheckTraps, 1,
143 "One range_check uncommon trap should be fired.");
144
145 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
146 test.getMethodWithLockName(), outputAnalyzer.getOutput());
147
148 int expectedStatEntries = (useRTMDeopt ? 4 : 2);
149
150 Asserts.assertEQ(statistics.size(), expectedStatEntries,
151 String.format("VM output should contain %d RTM locking "
152 + "statistics entries.", expectedStatEntries));
153 }
154
155 public static class Test implements CompilableTest {
156 // Following field have to be static in order to avoid escape analysis.
157 @SuppressWarnings("UnsuedDeclaration")
158 private static int field = 0;
159 private static final int ITERATIONS = 10000;
160 private static final int RANGE_CHECK_AT = ITERATIONS / 2;
161 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe();
162 private final Object monitor = new Object();
163
164 @Override
165 public String getMethodWithLockName() {
166 return this.getClass().getName() + "::forceAbort";
167 }
168
169 @Override
170 public String[] getMethodsToCompileNames() {
171 return new String[] { getMethodWithLockName() };
172 }
173
174 public void forceAbort(int a[], boolean abort) {
175 try {
176 synchronized(monitor) {
177 a[0]++;
178 if (abort) {
179 Test.field = Test.UNSAFE.addressSize();
180 }
181 }
182 } catch (Throwable t) {
183 // suppress any throwables
184 }
185 }
186
187 /**
188 * Usage:
189 * Test <inflate monitor>
190 */
191 public static void main(String args[]) throws Throwable {
192 Test t = new Test();
193
194 boolean shouldBeInflated = Boolean.valueOf(args[0]);
195 if (shouldBeInflated) {
196 AbortProvoker.inflateMonitor(t.monitor);
197 }
198
199 int tmp[] = new int[1];
200
201 for (int i = 0; i < Test.ITERATIONS; i++ ) {
202 AbortProvoker.verifyMonitorState(t.monitor, shouldBeInflated);
203 if (i == Test.RANGE_CHECK_AT) {
204 t.forceAbort(new int[0], false);
205 } else {
206 boolean isThreshold
207 = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD);
208 boolean isThresholdPlusRange
209 = (i == TestRTMAfterNonRTMDeopt.ABORT_THRESHOLD
210 + Test.RANGE_CHECK_AT);
211 t.forceAbort(tmp, isThreshold || isThresholdPlusRange);
212 }
213 }
214 }
215 }
216
217 public static void main(String args[]) throws Throwable {
218 new TestRTMAfterNonRTMDeopt().test();
219 }
220 }
221