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.
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 com.oracle.java.testlibrary.ProcessTools;
36 import com.oracle.java.testlibrary.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("CodeCache Roots", Level.FINEST),
70 new LogMessageWithLevel("SATB Filtering", Level.FINEST),
71 new LogMessageWithLevel("CM RefProcessor Roots", Level.FINEST),
72 new LogMessageWithLevel("Wait For Strong CLD", Level.FINEST),
73 new LogMessageWithLevel("Weak CLD Roots", Level.FINEST),
74 // Redirty Cards
75 new LogMessageWithLevel("Redirty Cards", Level.FINER),
76 new LogMessageWithLevel("Parallel Redirty", Level.FINEST),
77 new LogMessageWithLevel("Redirtied Cards", Level.FINEST),
78 // Misc Top-level
79 new LogMessageWithLevel("Code Root Purge", Level.FINER),
80 new LogMessageWithLevel("String Dedup Fixup", Level.FINER),
81 // Free CSet
82 new LogMessageWithLevel("Young Free CSet", Level.FINEST),
83 new LogMessageWithLevel("Non-Young Free CSet", Level.FINEST),
84 // Humongous Eager Reclaim
85 new LogMessageWithLevel("Humongous Reclaim", Level.FINER),
86 new LogMessageWithLevel("Humongous Register", Level.FINER),
87 };
88
89 void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception {
90 for (LogMessageWithLevel l : messages) {
91 if (level.lessOrEqualTo(l.level)) {
92 output.shouldNotContain(l.message);
93 } else {
94 output.shouldContain(l.message);
95 }
96 }
97 }
98
99 public static void main(String[] args) throws Exception {
100 new TestGCLogMessages().testNormalLogs();
101 new TestGCLogMessages().testWithToSpaceExhaustionLogs();
102 }
103
104 private void testNormalLogs() throws Exception {
105
106 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
107 "-Xmx10M",
108 GCTest.class.getName());
109
110 OutputAnalyzer output = new OutputAnalyzer(pb.start());
111 checkMessagesAtLevel(output, allLogMessages, Level.OFF);
112 output.shouldHaveExitValue(0);
113
114 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
115 "-XX:+UseStringDeduplication",
116 "-Xmx10M",
117 "-XX:+PrintGCDetails",
118 GCTest.class.getName());
119
120 output = new OutputAnalyzer(pb.start());
121 checkMessagesAtLevel(output, allLogMessages, Level.FINER);
122
123 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
124 "-XX:+UseStringDeduplication",
125 "-Xmx10M",
126 "-XX:+PrintGCDetails",
127 "-XX:+UnlockExperimentalVMOptions",
128 "-XX:G1LogLevel=finest",
129 GCTest.class.getName());
130
131 output = new OutputAnalyzer(pb.start());
132 checkMessagesAtLevel(output, allLogMessages, Level.FINEST);
133 output.shouldHaveExitValue(0);
134 }
135
136 LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] {
137 new LogMessageWithLevel("Evacuation Failure", Level.FINER),
138 new LogMessageWithLevel("Recalculate Used", Level.FINEST),
139 new LogMessageWithLevel("Remove Self Forwards", Level.FINEST),
140 new LogMessageWithLevel("Restore RemSet", Level.FINEST),
141 };
142
143 private void testWithToSpaceExhaustionLogs() throws Exception {
144 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
145 "-Xmx32M",
146 "-Xmn16M",
147 "-XX:+PrintGCDetails",
148 GCTestWithToSpaceExhaustion.class.getName());
149
150 OutputAnalyzer output = new OutputAnalyzer(pb.start());
151 checkMessagesAtLevel(output, exhFailureMessages, Level.FINER);
152 output.shouldHaveExitValue(0);
153
154 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
155 "-Xmx32M",
156 "-Xmn16M",
157 "-XX:+PrintGCDetails",
158 "-XX:+UnlockExperimentalVMOptions",
159 "-XX:G1LogLevel=finest",
160 GCTestWithToSpaceExhaustion.class.getName());
161
162 output = new OutputAnalyzer(pb.start());
163 checkMessagesAtLevel(output, exhFailureMessages, Level.FINEST);
164 output.shouldHaveExitValue(0);
165 }
166
167 static class GCTest {
168 private static byte[] garbage;
169 public static void main(String [] args) {
170 System.out.println("Creating garbage");
171 // create 128MB of garbage. This should result in at least one GC
172 for (int i = 0; i < 1024; i++) {
173 garbage = new byte[128 * 1024];
174 }
175 System.out.println("Done");
176 }
177 }
178
179 static class GCTestWithToSpaceExhaustion {
180 private static byte[] garbage;
181 private static byte[] largeObject;
182 public static void main(String [] args) {
183 largeObject = new byte[16*1024*1024];
184 System.out.println("Creating garbage");
185 // create 128MB of garbage. This should result in at least one GC,
186 // some of them with to-space exhaustion.
187 for (int i = 0; i < 1024; i++) {
188 garbage = new byte[128 * 1024];
189 }
190 System.out.println("Done");
191 }
192 }
193 }
194