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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  */
32 
33 import com.oracle.java.testlibrary.ProcessTools;
34 import com.oracle.java.testlibrary.OutputAnalyzer;
35 
36 public class TestGCLogMessages {
37 
38     private enum Level {
39         OFF, FINER, FINEST;
lessOrEqualTo(Level other)40         public boolean lessOrEqualTo(Level other) {
41             return this.compareTo(other) < 0;
42         }
43     }
44 
45     private class LogMessageWithLevel {
46         String message;
47         Level level;
48 
LogMessageWithLevel(String message, Level level)49         public LogMessageWithLevel(String message, Level level) {
50             this.message = message;
51             this.level = level;
52         }
53     };
54 
55     private LogMessageWithLevel allLogMessages[] = new LogMessageWithLevel[] {
56         // Ext Root Scan
57         new LogMessageWithLevel("Thread Roots (ms)", Level.FINEST),
58         new LogMessageWithLevel("StringTable Roots (ms)", Level.FINEST),
59         new LogMessageWithLevel("Universe Roots (ms)", Level.FINEST),
60         new LogMessageWithLevel("JNI Handles Roots (ms)", Level.FINEST),
61         new LogMessageWithLevel("ObjectSynchronizer Roots (ms)", Level.FINEST),
62         new LogMessageWithLevel("FlatProfiler Roots", Level.FINEST),
63         new LogMessageWithLevel("Management Roots", Level.FINEST),
64         new LogMessageWithLevel("SystemDictionary Roots", Level.FINEST),
65         new LogMessageWithLevel("CLDG Roots", Level.FINEST),
66         new LogMessageWithLevel("JVMTI Roots", Level.FINEST),
67         new LogMessageWithLevel("CodeCache Roots", Level.FINEST),
68         new LogMessageWithLevel("SATB Filtering", Level.FINEST),
69         new LogMessageWithLevel("CM RefProcessor Roots", Level.FINEST),
70         new LogMessageWithLevel("Wait For Strong CLD", Level.FINEST),
71         new LogMessageWithLevel("Weak CLD Roots", Level.FINEST),
72         // Redirty Cards
73         new LogMessageWithLevel("Redirty Cards", Level.FINER),
74         new LogMessageWithLevel("Parallel Redirty", Level.FINEST),
75         new LogMessageWithLevel("Redirtied Cards", Level.FINEST),
76         // Misc Top-level
77         new LogMessageWithLevel("Code Root Purge", Level.FINER),
78         new LogMessageWithLevel("String Dedup Fixup", Level.FINER),
79         // Free CSet
80         new LogMessageWithLevel("Young Free CSet", Level.FINEST),
81         new LogMessageWithLevel("Non-Young Free CSet", Level.FINEST),
82         // Humongous Eager Reclaim
83         new LogMessageWithLevel("Humongous Reclaim", Level.FINER),
84         new LogMessageWithLevel("Humongous Register", Level.FINER),
85     };
86 
checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level)87     void checkMessagesAtLevel(OutputAnalyzer output, LogMessageWithLevel messages[], Level level) throws Exception {
88         for (LogMessageWithLevel l : messages) {
89             if (level.lessOrEqualTo(l.level)) {
90                 output.shouldNotContain(l.message);
91             } else {
92                 output.shouldContain(l.message);
93             }
94         }
95     }
96 
main(String[] args)97     public static void main(String[] args) throws Exception {
98         new TestGCLogMessages().testNormalLogs();
99         new TestGCLogMessages().testWithToSpaceExhaustionLogs();
100     }
101 
testNormalLogs()102     private void testNormalLogs() throws Exception {
103 
104         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
105                                                                   "-Xmx10M",
106                                                                   GCTest.class.getName());
107 
108         OutputAnalyzer output = new OutputAnalyzer(pb.start());
109         checkMessagesAtLevel(output, allLogMessages, Level.OFF);
110         output.shouldHaveExitValue(0);
111 
112         pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
113                                                    "-XX:+UseStringDeduplication",
114                                                    "-Xmx10M",
115                                                    "-XX:+PrintGCDetails",
116                                                    GCTest.class.getName());
117 
118         output = new OutputAnalyzer(pb.start());
119         checkMessagesAtLevel(output, allLogMessages, Level.FINER);
120 
121         pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
122                                                    "-XX:+UseStringDeduplication",
123                                                    "-Xmx10M",
124                                                    "-XX:+PrintGCDetails",
125                                                    "-XX:+UnlockExperimentalVMOptions",
126                                                    "-XX:G1LogLevel=finest",
127                                                    GCTest.class.getName());
128 
129         output = new OutputAnalyzer(pb.start());
130         checkMessagesAtLevel(output, allLogMessages, Level.FINEST);
131         output.shouldHaveExitValue(0);
132     }
133 
134     LogMessageWithLevel exhFailureMessages[] = new LogMessageWithLevel[] {
135         new LogMessageWithLevel("Evacuation Failure", Level.FINER),
136         new LogMessageWithLevel("Recalculate Used", Level.FINEST),
137         new LogMessageWithLevel("Remove Self Forwards", Level.FINEST),
138         new LogMessageWithLevel("Restore RemSet", Level.FINEST),
139     };
140 
testWithToSpaceExhaustionLogs()141     private void testWithToSpaceExhaustionLogs() throws Exception {
142         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
143                                                                   "-Xmx32M",
144                                                                   "-Xmn16M",
145                                                                   "-XX:+PrintGCDetails",
146                                                                   GCTestWithToSpaceExhaustion.class.getName());
147 
148         OutputAnalyzer output = new OutputAnalyzer(pb.start());
149         checkMessagesAtLevel(output, exhFailureMessages, Level.FINER);
150         output.shouldHaveExitValue(0);
151 
152         pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
153                                                    "-Xmx32M",
154                                                    "-Xmn16M",
155                                                    "-XX:+PrintGCDetails",
156                                                    "-XX:+UnlockExperimentalVMOptions",
157                                                    "-XX:G1LogLevel=finest",
158                                                    GCTestWithToSpaceExhaustion.class.getName());
159 
160         output = new OutputAnalyzer(pb.start());
161         checkMessagesAtLevel(output, exhFailureMessages, Level.FINEST);
162         output.shouldHaveExitValue(0);
163     }
164 
165     static class GCTest {
166         private static byte[] garbage;
main(String [] args)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;
main(String [] args)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 
193