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.flavor == "server" & !vm.emulatedClient & vm.rtm.cpu & vm.rtm.os
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.addressSize();
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