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.
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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 *
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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
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22 */
23
24 /*
25 * @test TestGCLogMessages
26 * @bug 8035406 8027295 8035398 8019342 8027959 8048179 8027962
27 * @summary Ensure that the PrintGCDetails output for a minor GC with G1
28 * includes the expected necessary messages.
29 * @key gc
30 * @library /testlibrary
31 * @modules java.base/sun.misc
32 * java.management
33 */
34
35 import jdk.test.lib.ProcessTools;
36 import jdk.test.lib.OutputAnalyzer;
37
38 public class TestGCLogMessages {
39
40 private enum Level {
41 OFF, FINER, FINEST;
42 public boolean lessOrEqualTo(Level other) {
43 return this.compareTo(other) < 0;
44 }
45 }
46
47 private class LogMessageWithLevel {
48 String message;
49 Level level;
50
51 public LogMessageWithLevel(String message, Level level) {
52 this.message = message;
53 this.level = level;
54 }
55 };
56
57 private LogMessageWithLevel allLogMessages[] = new LogMessageWithLevel[] {
58 // Ext Root Scan
59 new LogMessageWithLevel("Thread Roots (ms)", Level.FINEST),
60 new LogMessageWithLevel("StringTable Roots (ms)", Level.FINEST),
61 new LogMessageWithLevel("Universe Roots (ms)", Level.FINEST),
62 new LogMessageWithLevel("JNI Handles Roots (ms)", Level.FINEST),
63 new LogMessageWithLevel("ObjectSynchronizer Roots (ms)", Level.FINEST),
64 new LogMessageWithLevel("FlatProfiler Roots", Level.FINEST),
65 new LogMessageWithLevel("Management Roots", Level.FINEST),
66 new LogMessageWithLevel("SystemDictionary Roots", Level.FINEST),
67 new LogMessageWithLevel("CLDG Roots", Level.FINEST),
68 new LogMessageWithLevel("JVMTI Roots", Level.FINEST),
69 new LogMessageWithLevel("SATB Filtering", Level.FINEST),
70 new LogMessageWithLevel("CM RefProcessor Roots", Level.FINEST),
71 new LogMessageWithLevel("Wait For Strong CLD", Level.FINEST),
72 new LogMessageWithLevel("Weak CLD Roots", Level.FINEST),
73 // Redirty Cards
74 new LogMessageWithLevel("Redirty Cards", Level.FINER),
75 new LogMessageWithLevel("Parallel Redirty", Level.FINEST),
76 new LogMessageWithLevel("Redirtied Cards", Level.FINEST),
77 // Misc Top-level
78 new LogMessageWithLevel("Code Root Purge", Level.FINER),
79 new LogMessageWithLevel("String Dedup Fixup", Level.FINER),
80 // Free CSet
81 new LogMessageWithLevel("Young Free CSet", Level.FINEST),
82 new LogMessageWithLevel("Non-Young Free CSet", Level.FINEST),
83 // Humongous Eager Reclaim
84 new LogMessageWithLevel("Humongous Reclaim", Level.FINER),
85 new LogMessageWithLevel("Humongous Register", Level.FINER),
86 };
87
88 void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception {
89 for (LogMessageWithLevel l : messages) {
90 if (level.lessOrEqualTo(l.level)) {
91 output.shouldNotContain(l.message);
92 } else {
93 output.shouldContain(l.message);
94 }
95 }
96 }
97
98 public static void main(String[] args) throws Exception {
99 new TestGCLogMessages().testNormalLogs();
100 new TestGCLogMessages().testWithToSpaceExhaustionLogs();
101 }
102
103 private void testNormalLogs() throws Exception {
104
105 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
106 "-Xmx10M",
107 GCTest.class.getName());
108
109 OutputAnalyzer output = new OutputAnalyzer(pb.start());
110 checkMessagesAtLevel(output, allLogMessages, Level.OFF);
111 output.shouldHaveExitValue(0);
112
113 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
114 "-XX:+UseStringDeduplication",
115 "-Xmx10M",
116 "-XX:+PrintGCDetails",
117 GCTest.class.getName());
118
119 output = new OutputAnalyzer(pb.start());
120 checkMessagesAtLevel(output, allLogMessages, Level.FINER);
121
122 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
123 "-XX:+UseStringDeduplication",
124 "-Xmx10M",
125 "-XX:+PrintGCDetails",
126 "-XX:+UnlockExperimentalVMOptions",
127 "-XX:G1LogLevel=finest",
128 GCTest.class.getName());
129
130 output = new OutputAnalyzer(pb.start());
131 checkMessagesAtLevel(output, allLogMessages, Level.FINEST);
132 output.shouldHaveExitValue(0);
133 }
134
135 LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] {
136 new LogMessageWithLevel("Evacuation Failure", Level.FINER),
137 new LogMessageWithLevel("Recalculate Used", Level.FINEST),
138 new LogMessageWithLevel("Remove Self Forwards", Level.FINEST),
139 new LogMessageWithLevel("Restore RemSet", Level.FINEST),
140 };
141
142 private void testWithToSpaceExhaustionLogs() throws Exception {
143 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
144 "-Xmx32M",
145 "-Xmn16M",
146 "-XX:+PrintGCDetails",
147 GCTestWithToSpaceExhaustion.class.getName());
148
149 OutputAnalyzer output = new OutputAnalyzer(pb.start());
150 checkMessagesAtLevel(output, exhFailureMessages, Level.FINER);
151 output.shouldHaveExitValue(0);
152
153 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
154 "-Xmx32M",
155 "-Xmn16M",
156 "-XX:+PrintGCDetails",
157 "-XX:+UnlockExperimentalVMOptions",
158 "-XX:G1LogLevel=finest",
159 GCTestWithToSpaceExhaustion.class.getName());
160
161 output = new OutputAnalyzer(pb.start());
162 checkMessagesAtLevel(output, exhFailureMessages, Level.FINEST);
163 output.shouldHaveExitValue(0);
164 }
165
166 static class GCTest {
167 private static byte[] garbage;
168 public static void main(String [] args) {
169 System.out.println("Creating garbage");
170 // create 128MB of garbage. This should result in at least one GC
171 for (int i = 0; i < 1024; i++) {
172 garbage = new byte[128 * 1024];
173 }
174 System.out.println("Done");
175 }
176 }
177
178 static class GCTestWithToSpaceExhaustion {
179 private static byte[] garbage;
180 private static byte[] largeObject;
181 public static void main(String [] args) {
182 largeObject = new byte[16*1024*1024];
183 System.out.println("Creating garbage");
184 // create 128MB of garbage. This should result in at least one GC,
185 // some of them with to-space exhaustion.
186 for (int i = 0; i < 1024; i++) {
187 garbage = new byte[128 * 1024];
188 }
189 System.out.println("Done");
190 }
191 }
192 }
193