1 /*
2 * Copyright (c) 2017, 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 import java.util.ArrayList;
25 import java.util.Scanner;
26 import java.util.List;
27 import java.io.File;
28 import java.io.IOException;
29 import java.util.stream.Collectors;
30 import java.io.OutputStream;
31 import jdk.test.lib.apps.LingeredApp;
32 import jdk.test.lib.JDKToolLauncher;
33 import jdk.test.lib.Platform;
34 import jdk.test.lib.process.ProcessTools;
35 import jdk.test.lib.process.OutputAnalyzer;
36 import jdk.test.lib.Utils;
37 import jdk.test.lib.Asserts;
38
39 /*
40 * @test
41 * @library /test/lib
42 * @run main/othervm TestClhsdbJstackLock
43 */
44
45 public class TestClhsdbJstackLock {
46
47 private static final String JSTACK_OUT_FILE = "jstack_out.txt";
48
49 private static void verifyJStackOutput() throws Exception {
50
51 Exception unexpected = null;
52 File jstackFile = new File(JSTACK_OUT_FILE);
53 Asserts.assertTrue(jstackFile.exists() && jstackFile.isFile(),
54 "File with jstack output not created: " +
55 jstackFile.getAbsolutePath());
56 try {
57 Scanner scanner = new Scanner(jstackFile);
58
59 boolean classLockOwnerFound = false;
60 boolean classLockWaiterFound = false;
61 boolean objectLockOwnerFound = false;
62 boolean primitiveLockOwnerFound = false;
63
64 while (scanner.hasNextLine()) {
65 String line = scanner.nextLine();
66 System.out.println(line);
67
68 if (line.contains("missing reason for ")) {
69 unexpected = new RuntimeException("Unexpected msg: missing reason for ");
70 break;
71 }
72 if (line.matches("^\\s+- locked <0x[0-9a-f]+> \\(a java\\.lang\\.Class for LingeredAppWithLock\\)$")) {
73 classLockOwnerFound = true;
74 }
75 if (line.matches("^\\s+- waiting to lock <0x[0-9a-f]+> \\(a java\\.lang\\.Class for LingeredAppWithLock\\)$")) {
76 classLockWaiterFound = true;
77 }
78 if (line.matches("^\\s+- locked <0x[0-9a-f]+> \\(a java\\.lang\\.Thread\\)$")) {
79 objectLockOwnerFound = true;
80 }
81 if (line.matches("^\\s+- locked <0x[0-9a-f]+> \\(a java\\.lang\\.Class for int\\)$")) {
82 primitiveLockOwnerFound = true;
83 }
84 }
85
86 if (!classLockOwnerFound || !classLockWaiterFound ||
87 !objectLockOwnerFound || !primitiveLockOwnerFound) {
88 unexpected = new RuntimeException(
89 "classLockOwnerFound = " + classLockOwnerFound +
90 ", classLockWaiterFound = " + classLockWaiterFound +
91 ", objectLockOwnerFound = " + objectLockOwnerFound +
92 ", primitiveLockOwnerFound = " + primitiveLockOwnerFound);
93 }
94 if (unexpected != null) {
95 throw unexpected;
96 }
97 } catch (Exception ex) {
98 throw new RuntimeException("Test ERROR " + ex, ex);
99 } finally {
100 jstackFile.delete();
101 }
102 }
103
104 private static void startClhsdbForLock(long lingeredAppPid) throws Exception {
105
106 Process p;
107 JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jhsdb");
108 launcher.addToolArg("clhsdb");
109 launcher.addToolArg("--pid");
110 launcher.addToolArg(Long.toString(lingeredAppPid));
111
112 ProcessBuilder pb = new ProcessBuilder();
113 pb.command(launcher.getCommand());
114 System.out.println(
115 pb.command().stream().collect(Collectors.joining(" ")));
116
117 try {
118 p = pb.start();
119 } catch (Exception attachE) {
120 throw new Error("Couldn't start jhsdb or attach to LingeredApp : " + attachE);
121 }
122
123 // Issue the 'jstack' input at the clhsdb prompt.
124 OutputStream input = p.getOutputStream();
125 String str = "jstack > " + JSTACK_OUT_FILE + "\nquit\n";
126 try {
127 input.write(str.getBytes());
128 input.flush();
129 } catch (IOException ioe) {
130 throw new Error("Problem issuing the jstack command: " + str, ioe);
131 }
132
133 try {
134 p.waitFor();
135 } catch (InterruptedException ie) {
136 throw new Error("Problem awaiting the child process: " + ie, ie);
137 }
138
139 int exitValue = p.exitValue();
140 if (exitValue != 0) {
141 String output;
142 try {
143 output = new OutputAnalyzer(p).getOutput();
144 } catch (IOException ioe) {
145 throw new Error("Can't get failed clhsdb process output: " + ioe, ioe);
146 }
147 throw new AssertionError("clhsdb wasn't run successfully: " + output);
148 }
149 }
150
151 public static void main (String... args) throws Exception {
152
153 LingeredApp app = null;
154
155 if (!Platform.shouldSAAttach()) {
156 System.out.println(
157 "SA attach not expected to work - test skipped.");
158 return;
159 }
160
161 try {
162 List<String> vmArgs = new ArrayList<String>(Utils.getVmOptions());
163
164 app = new LingeredAppWithLock();
165 LingeredApp.startApp(vmArgs, app);
166 System.out.println ("Started LingeredApp with pid " + app.getPid());
167 startClhsdbForLock(app.getPid());
168 verifyJStackOutput();
169 } finally {
170 LingeredApp.stopApp(app);
171 }
172 }
173 }