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/*
* Copyright (c) 2018, 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 8049695
* @summary Ensure shmem transport works with long names
* @requires os.family == "windows"
* @library /test/lib
* @run main/othervm ShMemLongName
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.util.Collections;
import java.util.Map;
import com.sun.jdi.Bootstrap;
import com.sun.jdi.VirtualMachine;
import com.sun.jdi.connect.AttachingConnector;
import com.sun.jdi.connect.Connector;
import jdk.test.lib.process.ProcessTools;
public class ShMemLongName {
private static final int maxShMemLength = 49;
private static final String transport = "dt_shmem";
public static void main(String[] args) throws Exception {
// test with the maximum supported shmem name length
String shmemName = ("ShMemLongName" + ProcessHandle.current().pid()
+ String.join("", Collections.nCopies(maxShMemLength, "x"))
).substring(0, maxShMemLength);
Process target = getTarget(shmemName).start();
try {
waitForReady(target);
log("attaching to the VM...");
AttachingConnector ac = Bootstrap.virtualMachineManager().attachingConnectors()
.stream()
.filter(c -> transport.equals(c.transport().name()))
.findFirst()
.orElseThrow(() -> new RuntimeException("Failed to find transport " + transport));
Map<String, Connector.Argument> acArgs = ac.defaultArguments();
acArgs.get("name").setValue(shmemName);
VirtualMachine vm = ac.attach(acArgs);
log("attached. test(1) PASSED.");
vm.dispose();
} finally {
target.destroy();
target.waitFor();
}
// extra test: ensure using of too-long name fails gracefully
// (shmemName + "X") is expected to be "too long".
ProcessTools.executeProcess(getTarget(shmemName + "X"))
.shouldContain("address strings longer than")
.shouldHaveExitValue(2);
log("test(2) PASSED.");
}
private static void log(String s) {
System.out.println(s);
System.out.flush();
}
// creates target process builder for the specified shmem transport name
private static ProcessBuilder getTarget(String shmemName) throws IOException {
log("starting target with shmem name: '" + shmemName + "'...");
return ProcessTools.createJavaProcessBuilder(
"-Xdebug",
"-Xrunjdwp:transport=" + transport + ",server=y,suspend=n,address=" + shmemName,
"ShMemLongName$Target");
}
private static void waitForReady(Process target) throws Exception {
InputStream os = target.getInputStream();
try (BufferedReader reader = new BufferedReader(new InputStreamReader(os))) {
String line;
while ((line = reader.readLine()) != null) {
if (line.equals(Target.readyString)) {
return;
}
}
}
}
public static class Target {
public static final String readyString = "Ready";
public static void main(String[] args) throws Exception {
log(readyString);
while (true) {
Thread.sleep(1000);
}
}
}
}
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