TestUseRTMAfterLockInflation.java revision 8359:ed6389f70257 
1/*
2 * Copyright (c) 2014, 2015, 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.
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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 /testlibrary /../../test/lib /compiler/testlibrary
31 * @modules java.base/sun.misc
32 *          java.management
33 * @build TestUseRTMAfterLockInflation
34 * @run main ClassFileInstaller sun.hotspot.WhiteBox
35 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
36 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
37 *                   -XX:+WhiteBoxAPI TestUseRTMAfterLockInflation
38 */
39
40import java.util.List;
41
42import jdk.test.lib.*;
43import jdk.test.lib.cli.CommandLineOptionTest;
44import jdk.test.lib.cli.predicate.AndPredicate;
45import rtm.*;
46import rtm.predicate.SupportedCPU;
47import rtm.predicate.SupportedVM;
48
49/**
50 * Test verifies that RTM is used after lock inflation by executing compiled
51 * method with RTM-based lock elision using stack lock first, then that lock
52 * is inflated and the same compiled method invoked again.
53 *
54 * Compiled method invoked {@code AbortProvoker.DEFAULT_ITERATIONS} times before
55 * lock inflation and the same amount of times after inflation.
56 * As a result total locks count should be equal to
57 * {@code 2 * AbortProvoker.DEFAULT_ITERATIONS}.
58 * It is a pretty strict assertion which could fail if some retriable abort
59 * happened: it could be {@code AbortType.RETRIABLE} or
60 * {@code AbortType.MEM_CONFLICT}, but unfortunately abort can has both these
61 * reasons simultaneously. In order to avoid false negative failures related
62 * to incorrect aborts counting, -XX:RTMRetryCount=0 is used.
63 */
64public class TestUseRTMAfterLockInflation extends CommandLineOptionTest {
65    private static final long EXPECTED_LOCKS
66            = 2L * AbortProvoker.DEFAULT_ITERATIONS;
67
68    private TestUseRTMAfterLockInflation() {
69        super(new AndPredicate(new SupportedVM(), new SupportedCPU()));
70    }
71
72    @Override
73    protected void runTestCases() throws Throwable {
74        AbortProvoker provoker = AbortType.XABORT.provoker();
75        long totalLocksCount = 0;
76
77        OutputAnalyzer outputAnalyzer = RTMTestBase.executeRTMTest(
78                provoker,
79                "-XX:+UseRTMForStackLocks",
80                "-XX:RTMTotalCountIncrRate=1",
81                "-XX:RTMRetryCount=0",
82                "-XX:+PrintPreciseRTMLockingStatistics",
83                Test.class.getName(),
84                AbortType.XABORT.toString());
85
86        outputAnalyzer.shouldHaveExitValue(0);
87
88        List<RTMLockingStatistics> statistics = RTMLockingStatistics.fromString(
89                provoker.getMethodWithLockName(), outputAnalyzer.getOutput());
90
91        Asserts.assertEQ(statistics.size(), 2,
92                "VM output should contain two rtm locking statistics entries "
93                + "for method " + provoker.getMethodWithLockName());
94
95        for (RTMLockingStatistics s : statistics) {
96            totalLocksCount += s.getTotalLocks();
97        }
98
99        Asserts.assertEQ(totalLocksCount,
100                TestUseRTMAfterLockInflation.EXPECTED_LOCKS,
101                "Total lock count should be greater or equal to "
102                + TestUseRTMAfterLockInflation.EXPECTED_LOCKS);
103    }
104
105    public static class Test {
106        /**
107         * Usage:
108         * Test &lt;provoker type&gt;
109         */
110        public static void main(String args[]) throws Throwable {
111            Asserts.assertGT(args.length, 0,
112                    "AbortType name is expected as first argument.");
113
114            AbortProvoker provoker
115                    = AbortType.lookup(Integer.valueOf(args[0])).provoker();
116            for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
117                AbortProvoker.verifyMonitorState(provoker, false /*deflated*/);
118                provoker.forceAbort();
119            }
120            provoker.inflateMonitor();
121            for (int i = 0; i < AbortProvoker.DEFAULT_ITERATIONS; i++) {
122                AbortProvoker.verifyMonitorState(provoker, true /*inflated*/);
123                provoker.forceAbort();
124            }
125        }
126    }
127
128    public static void main(String args[]) throws Throwable {
129        new TestUseRTMAfterLockInflation().test();
130    }
131}
132