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 8069330
27 * @summary Ensure the 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, DEBUG, TRACE;
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 // Update RS
59 new LogMessageWithLevel("Scan HCC", Level.DEBUG),
60 // Ext Root Scan
61 new LogMessageWithLevel("Thread Roots:", Level.DEBUG),
62 new LogMessageWithLevel("StringTable Roots:", Level.DEBUG),
63 new LogMessageWithLevel("Universe Roots:", Level.DEBUG),
64 new LogMessageWithLevel("JNI Handles Roots:", Level.DEBUG),
65 new LogMessageWithLevel("ObjectSynchronizer Roots:", Level.DEBUG),
66 new LogMessageWithLevel("FlatProfiler Roots", Level.DEBUG),
67 new LogMessageWithLevel("Management Roots", Level.DEBUG),
68 new LogMessageWithLevel("SystemDictionary Roots", Level.DEBUG),
69 new LogMessageWithLevel("CLDG Roots", Level.DEBUG),
70 new LogMessageWithLevel("JVMTI Roots", Level.DEBUG),
71 new LogMessageWithLevel("SATB Filtering", Level.DEBUG),
72 new LogMessageWithLevel("CM RefProcessor Roots", Level.DEBUG),
73 new LogMessageWithLevel("Wait For Strong CLD", Level.DEBUG),
74 new LogMessageWithLevel("Weak CLD Roots", Level.DEBUG),
75 // Redirty Cards
76 new LogMessageWithLevel("Redirty Cards", Level.DEBUG),
77 new LogMessageWithLevel("Parallel Redirty", Level.DEBUG),
78 new LogMessageWithLevel("Redirtied Cards", Level.DEBUG),
79 // Misc Top-level
80 new LogMessageWithLevel("Code Root Purge", Level.DEBUG),
81 new LogMessageWithLevel("String Dedup Fixup", Level.DEBUG),
82 new LogMessageWithLevel("Expand Heap After Collection", Level.DEBUG),
83 // Free CSet
84 new LogMessageWithLevel("Young Free CSet", Level.TRACE),
85 new LogMessageWithLevel("Non-Young Free CSet", Level.TRACE),
86 // Humongous Eager Reclaim
87 new LogMessageWithLevel("Humongous Reclaim", Level.DEBUG),
88 new LogMessageWithLevel("Humongous Register", Level.DEBUG),
89 };
90
91 void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception {
92 for (LogMessageWithLevel l : messages) {
93 if (level.lessOrEqualTo(l.level)) {
94 output.shouldNotContain(l.message);
95 } else {
96 output.shouldContain(l.message);
97 }
98 }
99 }
100
101 public static void main(String[] args) throws Exception {
102 new TestGCLogMessages().testNormalLogs();
103 new TestGCLogMessages().testWithToSpaceExhaustionLogs();
104 }
105
106 private void testNormalLogs() throws Exception {
107
108 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
109 "-Xmx10M",
110 GCTest.class.getName());
111
112 OutputAnalyzer output = new OutputAnalyzer(pb.start());
113 checkMessagesAtLevel(output, allLogMessages, Level.OFF);
114 output.shouldHaveExitValue(0);
115
116 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
117 "-XX:+UseStringDeduplication",
118 "-Xmx10M",
119 "-Xlog:gc+phases=debug",
120 GCTest.class.getName());
121
122 output = new OutputAnalyzer(pb.start());
123 checkMessagesAtLevel(output, allLogMessages, Level.DEBUG);
124
125 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
126 "-XX:+UseStringDeduplication",
127 "-Xmx10M",
128 "-Xlog:gc+phases=trace",
129 GCTest.class.getName());
130
131 output = new OutputAnalyzer(pb.start());
132 checkMessagesAtLevel(output, allLogMessages, Level.TRACE);
133 output.shouldHaveExitValue(0);
134 }
135
136 LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] {
137 new LogMessageWithLevel("Evacuation Failure", Level.DEBUG),
138 new LogMessageWithLevel("Recalculate Used", Level.TRACE),
139 new LogMessageWithLevel("Remove Self Forwards", Level.TRACE),
140 new LogMessageWithLevel("Restore RemSet", Level.TRACE),
141 };
142
143 private void testWithToSpaceExhaustionLogs() throws Exception {
144 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
145 "-Xmx32M",
146 "-Xmn16M",
147 "-Xlog:gc+phases=debug",
148 GCTestWithToSpaceExhaustion.class.getName());
149
150 OutputAnalyzer output = new OutputAnalyzer(pb.start());
151 checkMessagesAtLevel(output, exhFailureMessages, Level.DEBUG);
152 output.shouldHaveExitValue(0);
153
154 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
155 "-Xmx32M",
156 "-Xmn16M",
157 "-Xlog:gc+phases=trace",
158 GCTestWithToSpaceExhaustion.class.getName());
159
160 output = new OutputAnalyzer(pb.start());
161 checkMessagesAtLevel(output, exhFailureMessages, Level.TRACE);
162 output.shouldHaveExitValue(0);
163 }
164
165 static class GCTest {
166 private static byte[] garbage;
167 public static void main(String [] args) {
168 System.out.println("Creating garbage");
169 // create 128MB of garbage. This should result in at least one GC
170 for (int i = 0; i < 1024; i++) {
171 garbage = new byte[128 * 1024];
172 }
173 System.out.println("Done");
174 }
175 }
176
177 static class GCTestWithToSpaceExhaustion {
178 private static byte[] garbage;
179 private static byte[] largeObject;
180 public static void main(String [] args) {
181 largeObject = new byte[16*1024*1024];
182 System.out.println("Creating garbage");
183 // create 128MB of garbage. This should result in at least one GC,
184 // some of them with to-space exhaustion.
185 for (int i = 0; i < 1024; i++) {
186 garbage = new byte[128 * 1024];
187 }
188 System.out.println("Done");
189 }
190 }
191 }
192