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/*
* Copyright (c) 2006, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* author Edward Wang
*
* @test
* @bug 6368984
* @key intermittent
* @summary Configuring unconnected Socket before passing to implAccept
* can cause fd leak.
* This test may fail intermittently if foreign processes will
* try to establish connection to the test server socket.
* @requires os.family != "windows"
* @requires vm.flagless
* @library /test/lib
* @build jdk.test.lib.Utils
* jdk.test.lib.Asserts
* jdk.test.lib.JDKToolFinder
* jdk.test.lib.JDKToolLauncher
* jdk.test.lib.Platform
* jdk.test.lib.process.*
* AcceptCauseFileDescriptorLeak
* @run main/othervm AcceptCauseFileDescriptorLeak root
*/
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.List;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.process.OutputAnalyzer;
public class AcceptCauseFileDescriptorLeak {
private static final int REPS = 2048;
private static final int THRESHOLD = 1024;
public static void main(String[] args) throws Exception {
if (args.length != 0) {
OutputAnalyzer analyzer = execCmd("ulimit -n -H");
String output = analyzer.getOutput();
if (output == null || output.length() == 0) {
throw new RuntimeException("\"ulimit -n -H\" output nothing"
+ " and its exit code is " + analyzer.getExitValue());
} else {
output = output.trim();
// Set max open file descriptors to 1024
// if it is unlimited or greater than 1024,
// otherwise just do test directly
if ("unlimited".equals(output)
|| Integer.valueOf(output) > THRESHOLD) {
analyzer = execCmd("ulimit -n " + THRESHOLD + "; "
+ composeJavaTestStr());
System.out.println("Output: ["
+ analyzer.getOutput() + "]");
int rc = analyzer.getExitValue();
if (rc != 0) {
throw new RuntimeException(
"Unexpected exit code: " + rc);
}
return;
}
}
}
final ServerSocket ss = new ServerSocket() {
public Socket accept() throws IOException {
Socket s = new Socket() {
};
s.setSoTimeout(10000);
implAccept(s);
return s;
}
};
ss.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
Thread t = new Thread(new Runnable() {
public void run() {
int repsCompleted = 0;
try {
for (; repsCompleted < REPS; repsCompleted++) {
(new Socket(InetAddress.getLoopbackAddress(), ss.getLocalPort())).close();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
System.out.println("Client iterations completed:" + repsCompleted);
}
}
});
t.start();
int repsCompleted = 0;
try {
for (; repsCompleted < REPS; repsCompleted++) {
ss.accept().close();
}
} finally {
System.out.println("Server iterations completed:" + repsCompleted);
ss.close();
}
t.join();
}
/**
* Execute command with shell
*
* @param command
* @return OutputAnalyzer
* @throws IOException
*/
static OutputAnalyzer execCmd(String command) throws IOException {
List<String> cmd = List.of("sh", "-c", command);
System.out.println("Executing: " + cmd);
ProcessBuilder pb = new ProcessBuilder(cmd);
return new OutputAnalyzer(pb.start());
}
static String composeJavaTestStr() {
return JDKToolFinder.getTestJDKTool("java") + " "
+ AcceptCauseFileDescriptorLeak.class.getName();
}
}
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