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/*
* Copyright (c) 2021, 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.
*/
/* @test
* @bug 8269481
* @summary Tests that file descriptors are closed
* @requires (os.family == "linux")
* @run main/othervm CloseDescriptors
*/
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.nio.ByteBuffer;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.Optional;
import com.sun.nio.sctp.MessageInfo;
import com.sun.nio.sctp.SctpMultiChannel;
public class CloseDescriptors {
private static final int NUM = 5;
private static final int SIZE = 1024;
private static final int MAX_DESC = 3;
public static void main(String[] args) throws Exception {
if (!Util.isSCTPSupported()) {
System.out.println("SCTP protocol is not supported");
System.out.println("Test cannot be run");
return;
}
List<String> lsofDirs = List.of("/usr/bin", "/usr/sbin");
Optional<Path> lsof = lsofDirs.stream()
.map(s -> Path.of(s, "lsof"))
.filter(f -> Files.isExecutable(f))
.findFirst();
if (!lsof.isPresent()) {
System.out.println("Cannot locate lsof in " + lsofDirs);
System.out.println("Test cannot be run");
return;
}
try (ServerSocket ss = new ServerSocket(0)) {
int port = ss.getLocalPort();
Thread server = new Server(port);
server.start();
Thread.sleep(100); // wait for server to be ready
System.out.println("begin");
for (int i = 0; i < 5; ++i) {
System.out.println(i);
doIt(port);
Thread.sleep(100);
}
System.out.println("end");
server.join();
}
long pid = ProcessHandle.current().pid();
ProcessBuilder pb = new ProcessBuilder(
lsof.get().toString(), "-U", "-a", "-p", Long.toString(pid));
Process p = pb.start();
Object[] lines = p.inputReader().lines().toArray();
p.waitFor();
int nfds = lines.length - 1;
if (nfds > MAX_DESC) {
throw new RuntimeException("Number of open descriptors " +
nfds + " > " + MAX_DESC);
}
}
static void doIt(int port) throws Exception {
InetSocketAddress sa = new InetSocketAddress("localhost", port);
for (int i = 0; i < NUM; ++i) {
System.out.println(" " + i);
SctpMultiChannel channel = SctpMultiChannel.open();
channel.configureBlocking(true);
MessageInfo info = MessageInfo.createOutgoing(sa, 0);
ByteBuffer buffer = ByteBuffer.allocateDirect(SIZE);
channel.send(buffer, info);
channel.close();
Thread.sleep(200);
}
}
static class Server extends Thread {
int port;
Server(int port) {
this.port = port;
}
@Override
public void run() {
for (int i = 0; i < NUM; i++) {
try {
SctpMultiChannel sm = SctpMultiChannel.open();
InetSocketAddress sa =
new InetSocketAddress("localhost", port);
sm.bind(sa);
ByteBuffer buffer = ByteBuffer.allocateDirect(SIZE);
MessageInfo info = sm.receive(buffer, null, null);
sm.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
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