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 RTMTotalCountIncrRate option affects
29 * RTM locking statistics.
30 * @library /test/lib /
31 * @modules java.base/jdk.internal.misc
32 * java.management
33 * @build sun.hotspot.WhiteBox
34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
35 * sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 * -XX:+WhiteBoxAPI
38 * compiler.rtm.locking.TestRTMTotalCountIncrRate
39 */
40
41 package compiler.rtm.locking;
42
43 import compiler.testlibrary.rtm.AbortProvoker;
44 import compiler.testlibrary.rtm.CompilableTest;
45 import compiler.testlibrary.rtm.RTMLockingStatistics;
46 import compiler.testlibrary.rtm.RTMTestBase;
47 import compiler.testlibrary.rtm.predicate.SupportedCPU;
48 import compiler.testlibrary.rtm.predicate.SupportedOS;
49 import compiler.testlibrary.rtm.predicate.SupportedVM;
50 import jdk.internal.misc.Unsafe;
51 import jdk.test.lib.Asserts;
52 import jdk.test.lib.process.OutputAnalyzer;
53 import jdk.test.lib.unsafe.UnsafeHelper;
54 import jdk.test.lib.cli.CommandLineOptionTest;
55 import jdk.test.lib.cli.predicate.AndPredicate;
56
57 import java.util.List;
58
59 /**
60 * Test verifies that with RTMTotalCountIncrRate=1 RTM locking statistics
61 * contains precise information abort attempted locks and that with other values
62 * statistics contains information abort non-zero locking attempts.
63 * Since assert done for RTMTotalCountIncrRate=1 is pretty strict, test uses
64 * -XX:RTMRetryCount=0 to avoid issue with retriable aborts. For more details on
65 * that issue see {@link TestUseRTMAfterLockInflation}.
66 */
67 public class TestRTMTotalCountIncrRate extends CommandLineOptionTest {
68 private TestRTMTotalCountIncrRate() {
69 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM()));
70 }
71
72 @Override
73 protected void runTestCases() throws Throwable {
74 verifyLocksCount(1, false);
75 verifyLocksCount(64, false);
76 verifyLocksCount(128, false);
77 verifyLocksCount(1, true);
78 verifyLocksCount(64, true);
79 verifyLocksCount(128, true);
80 }
81
82 private void verifyLocksCount(int incrRate, boolean useStackLock)
83 throws Throwable{
84 CompilableTest test = new Test();
85
86 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
87 test,
88 CommandLineOptionTest.prepareBooleanFlag("UseRTMForStackLocks",
89 useStackLock),
90 CommandLineOptionTest.prepareNumericFlag(
91 "RTMTotalCountIncrRate", incrRate),
92 "-XX:RTMRetryCount=0",
93 "-XX:+PrintPreciseRTMLockingStatistics",
94 Test.class.getName(),
95 Boolean.toString(!useStackLock)
96 );
97
98 outputAnalyzer.shouldHaveExitValue(0);
99
100 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
101 test.getMethodWithLockName(), outputAnalyzer.getOutput());
102
103 Asserts.assertEQ(statistics.size(), 1, "VM output should contain "
104 + "exactly one RTM locking statistics entry for method "
105 + test.getMethodWithLockName());
106
107 RTMLockingStatistics lock = statistics.get(0);
108 if (incrRate == 1) {
109 Asserts.assertEQ(lock.getTotalLocks(), Test.TOTAL_ITERATIONS,
110 "Total locks should be exactly the same as amount of "
111 + "iterations.");
112 }
113 }
114
115 public static class Test implements CompilableTest {
116 private static final long TOTAL_ITERATIONS = 10000L;
117 private static final Unsafe UNSAFE = UnsafeHelper.getUnsafe();
118 private final Object monitor = new Object();
119 // Following field have to be static in order to avoid escape analysis.
120 @SuppressWarnings("UnsuedDeclaration")
121 private static int field = 0;
122
123 @Override
124 public String getMethodWithLockName() {
125 return this.getClass().getName() + "::lock";
126 }
127
128 @Override
129 public String[] getMethodsToCompileNames() {
130 return new String[] { getMethodWithLockName() };
131 }
132
133 public void lock(boolean forceAbort) {
134 synchronized(monitor) {
135 if (forceAbort) {
136 // We're calling native method in order to force
137 // abort. It's done by explicit xabort call emitted
138 // in SharedRuntime::generate_native_wrapper.
139 // If an actual JNI call will be replaced by
140 // intrinsic - we'll be in trouble, since xabort
141 // will be no longer called and test may fail.
142 UNSAFE.addressSize();
143 }
144 Test.field++;
145 }
146 }
147
148 /**
149 * Usage:
150 * Test <inflate monitor>
151 */
152 public static void main(String args[]) throws Throwable {
153 Asserts.assertGTE(args.length, 1, "One argument required.");
154 Test test = new Test();
155 boolean shouldBeInflated = Boolean.valueOf(args[0]);
156 if (shouldBeInflated) {
157 AbortProvoker.inflateMonitor(test.monitor);
158 }
159 for (long i = 0L; i < Test.TOTAL_ITERATIONS; i++) {
160 AbortProvoker.verifyMonitorState(test.monitor,
161 shouldBeInflated);
162 // Force abort on first iteration to avoid rare case when
163 // there were no aborts and locks count was not incremented
164 // with RTMTotalCountIncrRate > 1 (in such case JVM won't
165 // print JVM locking statistics).
166 test.lock(i == 0);
167 }
168 }
169 }
170
171 public static void main(String args[]) throws Throwable {
172 new TestRTMTotalCountIncrRate().test();
173 }
174 }