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 rtm locking is used for stack locks before
29 * inflation and after it used for inflated locks.
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.TestUseRTMAfterLockInflation
39 */
40
41 package compiler.rtm.locking;
42
43 import compiler.testlibrary.rtm.AbortProvoker;
44 import compiler.testlibrary.rtm.AbortType;
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.test.lib.Asserts;
51 import jdk.test.lib.process.OutputAnalyzer;
52 import jdk.test.lib.cli.CommandLineOptionTest;
53 import jdk.test.lib.cli.predicate.AndPredicate;
54
55 import java.util.List;
56
57 /**
58 * Test verifies that RTM is used after lock inflation by executing compiled
59 * method with RTM-based lock elision using stack lock first, then that lock
60 * is inflated and the same compiled method invoked again.
61 *
62 * Compiled method invoked {@code AbortProvoker.DEFAULT_ITERATIONS} times before
63 * lock inflation and the same amount of times after inflation.
64 * As a result total locks count should be equal to
65 * {@code 2 * AbortProvoker.DEFAULT_ITERATIONS}.
66 * It is a pretty strict assertion which could fail if some retriable abort
67 * happened: it could be {@code AbortType.RETRIABLE} or
68 * {@code AbortType.MEM_CONFLICT}, but unfortunately abort can has both these
69 * reasons simultaneously. In order to avoid false negative failures related
70 * to incorrect aborts counting, -XX:RTMRetryCount=0 is used.
71 */
72 public class TestUseRTMAfterLockInflation extends CommandLineOptionTest {
73 private static final long EXPECTED_LOCKS
74 = 2L * AbortProvoker.DEFAULT_ITERATIONS;
75
76 private TestUseRTMAfterLockInflation() {
77 super(new AndPredicate(new SupportedCPU(), new SupportedOS(), new SupportedVM()));
78 }
79
80 @Override
81 protected void runTestCases() throws Throwable {
82 AbortProvoker provoker = AbortType.XABORT.provoker();
83 long totalLocksCount = 0;
84
85 OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
86 provoker,
87 "-XX:+UseRTMForStackLocks",
88 "-XX:RTMTotalCountIncrRate=1",
89 "-XX:RTMRetryCount=0",
90 "-XX:+PrintPreciseRTMLockingStatistics",
91 Test.class.getName(),
92 AbortType.XABORT.toString());
93
94 outputAnalyzer.shouldHaveExitValue(0);
95
96 List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
97 provoker.getMethodWithLockName(), outputAnalyzer.getOutput());
98
99 Asserts.assertEQ(statistics.size(), 2,
100 "VM output should contain two rtm locking statistics entries "
101 + "for method " + provoker.getMethodWithLockName());
102
103 for (RTMLockingStatistics s : statistics) {
104 totalLocksCount += s.getTotalLocks();
105 }
106
107 Asserts.assertEQ(totalLocksCount,
108 TestUseRTMAfterLockInflation.EXPECTED_LOCKS,
109 "Total lock count should be greater or equal to "
110 + TestUseRTMAfterLockInflation.EXPECTED_LOCKS);
111 }
112
113 public static class Test {
114 /**
115 * Usage:
116 * Test <provoker type>
117 */
118 public static void main(String args[]) throws Throwable {
119 Asserts.assertGT(args.length, 0,
120 "AbortType name is expected as first argument.");
121
122 AbortProvoker provoker
123 = AbortType.lookup(Integer.valueOf(args[0])).provoker();
124 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
125 AbortProvoker.verifyMonitorState(provoker, false /*deflated*/);
126 provoker.forceAbort();
127 }
128 provoker.inflateMonitor();
129 for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
130 AbortProvoker.verifyMonitorState(provoker, true /*inflated*/);
131 provoker.forceAbort();
132 }
133 }
134 }
135
136 public static void main(String args[]) throws Throwable {
137 new TestUseRTMAfterLockInflation().test();
138 }
139 }