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 * @test TestGCLogMessages 26 * @bug 8035406 8027295 8035398 8019342 8027959 8048179 8027962 8069330 8076463 8150630 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/jdk.internal.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(""), 42 INFO("info"), 43 DEBUG("debug"), 44 TRACE("trace"); 45 46 private String logName; 47 48 Level(String logName) { 49 this.logName = logName; 50 } 51 52 public boolean lessThan(Level other) { 53 return this.compareTo(other) < 0; 54 } 55 56 public String toString() { 57 return logName; 58 } 59 } 60 61 private class LogMessageWithLevel { 62 String message; 63 Level level; 64 65 public LogMessageWithLevel(String message, Level level) { 66 this.message = message; 67 this.level = level; 68 } 69 }; 70 71 private LogMessageWithLevel allLogMessages[] = new LogMessageWithLevel[] { 72 // Update RS 73 new LogMessageWithLevel("Scan HCC", Level.TRACE), 74 // Ext Root Scan 75 new LogMessageWithLevel("Thread Roots", Level.TRACE), 76 new LogMessageWithLevel("StringTable Roots", Level.TRACE), 77 new LogMessageWithLevel("Universe Roots", Level.TRACE), 78 new LogMessageWithLevel("JNI Handles Roots", Level.TRACE), 79 new LogMessageWithLevel("ObjectSynchronizer Roots", Level.TRACE), 80 new LogMessageWithLevel("FlatProfiler Roots", Level.TRACE), 81 new LogMessageWithLevel("Management Roots", Level.TRACE), 82 new LogMessageWithLevel("SystemDictionary Roots", Level.TRACE), 83 new LogMessageWithLevel("CLDG Roots", Level.TRACE), 84 new LogMessageWithLevel("JVMTI Roots", Level.TRACE), 85 new LogMessageWithLevel("SATB Filtering", Level.TRACE), 86 new LogMessageWithLevel("CM RefProcessor Roots", Level.TRACE), 87 new LogMessageWithLevel("Wait For Strong CLD", Level.TRACE), 88 new LogMessageWithLevel("Weak CLD Roots", Level.TRACE), 89 // Redirty Cards 90 new LogMessageWithLevel("Redirty Cards", Level.DEBUG), 91 new LogMessageWithLevel("Parallel Redirty", Level.TRACE), 92 new LogMessageWithLevel("Redirtied Cards", Level.TRACE), 93 // Misc Top-level 94 new LogMessageWithLevel("Code Roots Purge", Level.DEBUG), 95 new LogMessageWithLevel("String Dedup Fixup", Level.INFO), 96 new LogMessageWithLevel("Expand Heap After Collection", Level.INFO), 97 // Free CSet 98 new LogMessageWithLevel("Young Free Collection Set", Level.DEBUG), 99 new LogMessageWithLevel("Non-Young Free Collection Set", Level.DEBUG), 100 // Humongous Eager Reclaim 101 new LogMessageWithLevel("Humongous Reclaim", Level.DEBUG), 102 new LogMessageWithLevel("Humongous Register", Level.DEBUG), 103 // Preserve CM Referents 104 new LogMessageWithLevel("Preserve CM Refs", Level.DEBUG), 105 // Merge PSS 106 new LogMessageWithLevel("Merge Per-Thread State", Level.INFO), 107 }; 108 109 void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception { 110 for (LogMessageWithLevel l : messages) { 111 if (level.lessThan(l.level)) { 112 output.shouldNotContain(l.message); 113 } else { 114 output.shouldMatch("\\[" + l.level + ".*" + l.message); 115 } 116 } 117 } 118 119 public static void main(String[] args) throws Exception { 120 new TestGCLogMessages().testNormalLogs(); 121 new TestGCLogMessages().testWithToSpaceExhaustionLogs(); 122 } 123 124 private void testNormalLogs() throws Exception { 125 126 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 127 "-Xmx10M", 128 GCTest.class.getName()); 129 130 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 131 checkMessagesAtLevel(output, allLogMessages, Level.OFF); 132 output.shouldHaveExitValue(0); 133 134 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 135 "-XX:+UseStringDeduplication", 136 "-Xmx10M", 137 "-Xlog:gc+phases=debug", 138 GCTest.class.getName()); 139 140 output = new OutputAnalyzer(pb.start()); 141 checkMessagesAtLevel(output, allLogMessages, Level.DEBUG); 142 143 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 144 "-XX:+UseStringDeduplication", 145 "-Xmx10M", 146 "-Xlog:gc+phases=trace", 147 GCTest.class.getName()); 148 149 output = new OutputAnalyzer(pb.start()); 150 checkMessagesAtLevel(output, allLogMessages, Level.TRACE); 151 output.shouldHaveExitValue(0); 152 } 153 154 LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] { 155 new LogMessageWithLevel("Evacuation Failure", Level.DEBUG), 156 new LogMessageWithLevel("Recalculate Used", Level.TRACE), 157 new LogMessageWithLevel("Remove Self Forwards", Level.TRACE), 158 new LogMessageWithLevel("Restore RemSet", Level.TRACE), 159 }; 160 161 private void testWithToSpaceExhaustionLogs() throws Exception { 162 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 163 "-Xmx32M", 164 "-Xmn16M", 165 "-Xlog:gc+phases=debug", 166 GCTestWithToSpaceExhaustion.class.getName()); 167 168 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 169 checkMessagesAtLevel(output, exhFailureMessages, Level.DEBUG); 170 output.shouldHaveExitValue(0); 171 172 pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", 173 "-Xmx32M", 174 "-Xmn16M", 175 "-Xlog:gc+phases=trace", 176 GCTestWithToSpaceExhaustion.class.getName()); 177 178 output = new OutputAnalyzer(pb.start()); 179 checkMessagesAtLevel(output, exhFailureMessages, Level.TRACE); 180 output.shouldHaveExitValue(0); 181 } 182 183 static class GCTest { 184 private static byte[] garbage; 185 public static void main(String [] args) { 186 System.out.println("Creating garbage"); 187 // create 128MB of garbage. This should result in at least one GC 188 for (int i = 0; i < 1024; i++) { 189 garbage = new byte[128 * 1024]; 190 } 191 System.out.println("Done"); 192 } 193 } 194 195 static class GCTestWithToSpaceExhaustion { 196 private static byte[] garbage; 197 private static byte[] largeObject; 198 public static void main(String [] args) { 199 largeObject = new byte[16*1024*1024]; 200 System.out.println("Creating garbage"); 201 // create 128MB of garbage. This should result in at least one GC, 202 // some of them with to-space exhaustion. 203 for (int i = 0; i < 1024; i++) { 204 garbage = new byte[128 * 1024]; 205 } 206 System.out.println("Done"); 207 } 208 } 209 } 210