1 /*
2 * Copyright (c) 2006, 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 * author Edward Wang
26 *
27 * @test
28 * @bug 6368984
29 * @summary Configuring unconnected Socket before passing to implAccept
30 * can cause fd leak
31 * @requires (os.family != "windows")
32 * @library /test/lib
33 * @build jdk.test.lib.JDKToolFinder
34 * jdk.test.lib.process.OutputAnalyzer
35 * AcceptCauseFileDescriptorLeak
36 * @run main/othervm AcceptCauseFileDescriptorLeak root
37 */
38
39 import java.io.IOException;
40 import java.net.ServerSocket;
41 import java.net.Socket;
42 import java.util.List;
43
44 import jdk.test.lib.JDKToolFinder;
45 import jdk.test.lib.process.OutputAnalyzer;
46
47 public class AcceptCauseFileDescriptorLeak {
48 private static final int REPS = 2048;
49 private static final int THRESHOLD = 1024;
50
51 public static void main(String[] args) throws Exception {
52 if (args.length != 0) {
53 OutputAnalyzer analyzer = execCmd("ulimit -n -H");
54 String output = analyzer.getOutput();
55 if (output == null || output.length() == 0) {
56 throw new RuntimeException("\"ulimit -n -H\" output nothing"
57 + " and its exit code is " + analyzer.getExitValue());
58 } else {
59 output = output.trim();
60 // Set max open file descriptors to 1024
61 // if it is unlimited or greater than 1024,
62 // otherwise just do test directly
63 if ("unlimited".equals(output)
64 || Integer.valueOf(output) > THRESHOLD) {
65 analyzer = execCmd("ulimit -n " + THRESHOLD + "; "
66 + composeJavaTestStr());
67 System.out.println("Output: ["
68 + analyzer.getOutput() + "]");
69 int rc = analyzer.getExitValue();
70 if (rc != 0) {
71 throw new RuntimeException(
72 "Unexpected exit code: " + rc);
73 }
74 return;
75 }
76 }
77 }
78
79 final ServerSocket ss = new ServerSocket(0) {
80 public Socket accept() throws IOException {
81 Socket s = new Socket() {
82 };
83 s.setSoTimeout(10000);
84 implAccept(s);
85 return s;
86 }
87 };
88 Thread t = new Thread(new Runnable() {
89 public void run() {
90 try {
91 for (int i = 0; i < REPS; i++) {
92 (new Socket("localhost", ss.getLocalPort())).close();
93 }
94 } catch (IOException e) {
95 e.printStackTrace();
96 }
97 }
98 });
99 t.start();
100 try {
101 for (int i = 0; i < REPS; i++) {
102 ss.accept().close();
103 }
104 } finally {
105 ss.close();
106 }
107 t.join();
108 }
109
110 /**
111 * Execute command with shell
112 *
113 * @param command
114 * @return OutputAnalyzer
115 * @throws IOException
116 */
117 static OutputAnalyzer execCmd(String command) throws IOException {
118 List<String> cmd = List.of("sh", "-c", command);
119 System.out.println("Executing: " + cmd);
120 ProcessBuilder pb = new ProcessBuilder(cmd);
121 return new OutputAnalyzer(pb.start());
122 }
123
124 static String composeJavaTestStr() {
125 return JDKToolFinder.getTestJDKTool("java") + " "
126 + AcceptCauseFileDescriptorLeak.class.getName();
127 }
128 }
129