1 /*
2 * Copyright (c) 2023, Alibaba Group Holding Limited. 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 import java.io.File;
25 import java.io.IOException;
26 import java.nio.file.Files;
27 import java.util.Arrays;
28 import java.util.List;
29 import java.util.stream.Collectors;
30 import java.util.stream.Stream;
31
32 import jdk.test.lib.Asserts;
33 import jdk.test.lib.JDKToolLauncher;
34 import jdk.test.lib.Utils;
35 import jdk.test.lib.apps.LingeredApp;
36 import jdk.test.lib.dcmd.PidJcmdExecutor;
37 import jdk.test.lib.process.OutputAnalyzer;
38 import jdk.test.lib.process.ProcessTools;
39
40 import jdk.test.lib.hprof.HprofParser;
41
42 /**
43 * @test
44 * @bug 8306441 8319053
45 * @summary Verify the integrity of generated heap dump and capability of parallel dump
46 * @library /test/lib
47 * @run main HeapDumpParallelTest
48 */
49
50 public class HeapDumpParallelTest {
51
52 private static final String heapDumpFileName = "parallelHeapDump.bin";
53
54 private static void checkAndVerify(OutputAnalyzer dcmdOut, LingeredApp app, File heapDumpFile, boolean expectSerial) throws Exception {
55 dcmdOut.shouldHaveExitValue(0);
56 dcmdOut.shouldContain("Heap dump file created");
57 OutputAnalyzer appOut = new OutputAnalyzer(app.getProcessStdout());
58 appOut.shouldContain("[heapdump]");
59 String opts = Arrays.asList(Utils.getTestJavaOpts()).toString();
60 if (opts.contains("-XX:+UseSerialGC") || opts.contains("-XX:+UseEpsilonGC")) {
61 System.out.println("UseSerialGC detected.");
62 expectSerial = true;
63 }
64 if (!expectSerial && Runtime.getRuntime().availableProcessors() > 1) {
65 appOut.shouldContain("Dump heap objects in parallel");
66 appOut.shouldContain("Merge heap files complete");
67 } else {
68 appOut.shouldNotContain("Dump heap objects in parallel");
69 }
70 HprofParser.parseAndVerify(heapDumpFile);
71
72 List<String> files
73 = Stream.of(heapDumpFile.getAbsoluteFile().getParentFile().listFiles())
74 .filter(file -> !file.isDirectory())
75 .map(File::getName)
76 .filter(name -> name.startsWith(heapDumpFileName) && !name.equals(heapDumpFileName))
77 .collect(Collectors.toList());
78 if (!files.isEmpty()) {
79 throw new RuntimeException("Unexpected files left: " + files);
80 }
81 if (heapDumpFile.exists()) {
82 heapDumpFile.delete();
83 }
84 }
85
86 private static LingeredApp launchApp() throws IOException {
87 LingeredApp theApp = new LingeredApp();
88 LingeredApp.startApp(theApp, "-Xlog:heapdump", "-Xmx512m",
89 "-XX:-UseDynamicNumberOfGCThreads",
90 "-XX:ParallelGCThreads=2");
91 return theApp;
92 }
93
94 public static void main(String[] args) throws Exception {
95 File heapDumpFile = new File(heapDumpFileName);
96 if (heapDumpFile.exists()) {
97 heapDumpFile.delete();
98 }
99
100 LingeredApp theApp = launchApp();
101 try {
102 // Expect error message
103 OutputAnalyzer out = attachJcmdHeapDump(heapDumpFile, theApp.getPid(), "-parallel=" + -1);
104 out.shouldContain("Invalid number of parallel dump threads.");
105
106 // Expect serial dump because 0 implies to disable parallel dump
107 test(heapDumpFile, "-parallel=" + 0, true);
108
109 // Expect serial dump
110 test(heapDumpFile, "-parallel=" + 1, true);
111
112 // Expect parallel dump
113 test(heapDumpFile, "-parallel=" + Integer.MAX_VALUE, false);
114
115 // Expect parallel dump
116 test(heapDumpFile, "-gz=9 -overwrite -parallel=" + Runtime.getRuntime().availableProcessors(), false);
117 } finally {
118 theApp.stopApp();
119 }
120 }
121
122 private static void test(File heapDumpFile, String arg, boolean expectSerial) throws Exception {
123 LingeredApp theApp = launchApp();
124 try {
125 OutputAnalyzer dcmdOut = attachJcmdHeapDump(heapDumpFile, theApp.getPid(), arg);
126 theApp.stopApp();
127 checkAndVerify(dcmdOut, theApp, heapDumpFile, expectSerial);
128 } finally {
129 theApp.stopApp();
130 }
131 }
132
133 private static OutputAnalyzer attachJcmdHeapDump(File heapDumpFile, long lingeredAppPid, String arg) throws Exception {
134 // e.g. jcmd <pid> GC.heap_dump -parallel=cpucount <file_path>
135 System.out.println("Testing pid " + lingeredAppPid);
136 PidJcmdExecutor executor = new PidJcmdExecutor("" + lingeredAppPid);
137 return executor.execute("GC.heap_dump " + arg + " " + heapDumpFile.getAbsolutePath());
138 }
139 }