/*
* Copyright (c) 2019, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package jdk.jfr.api.consumer.streaming;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Properties;
import jdk.internal.misc.Unsafe;
import jdk.jfr.Event;
import jdk.test.lib.process.ProcessTools;
import com.sun.tools.attach.VirtualMachine;
/**
* Class that emits a NUMBER_OF_EVENTS and then awaits crash or exit
*
* Requires jdk.attach module.
*
*/
public final class TestProcess {
private static class TestEvent extends Event {
}
public final static int NUMBER_OF_EVENTS = 10;
private final Process process;
private final Path path;
public TestProcess(String name) throws IOException {
this.path = Paths.get("action-" + System.currentTimeMillis()).toAbsolutePath();
String[] args = {
"--add-exports",
"java.base/jdk.internal.misc=ALL-UNNAMED",
"-XX:StartFlightRecording:settings=none",
TestProcess.class.getName(), path.toString()
};
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false, args);
process = ProcessTools.startProcess(name, pb);
}
public static void main(String... args) throws Exception {
for (int i = 0; i < NUMBER_OF_EVENTS; i++) {
TestEvent e = new TestEvent();
e.commit();
}
Path path = Paths.get(args[0]);
while (true) {
try {
String action = Files.readString(path);
if ("crash".equals(action)) {
System.out.println("About to crash...");
Unsafe.getUnsafe().putInt(0L, 0);
}
if ("exit".equals(action)) {
System.out.println("About to exit...");
System.exit(0);
}
} catch (Exception ioe) {
// Ignore
}
takeNap();
}
}
public Path getRepository() {
while (true) {
try {
VirtualMachine vm = VirtualMachine.attach(String.valueOf(process.pid()));
Properties p = vm.getSystemProperties();
vm.detach();
String repo = (String) p.get("jdk.jfr.repository");
if (repo != null) {
return Paths.get(repo);
}
} catch (Exception e) {
System.out.println("Attach failed: " + e.getMessage());
System.out.println("Retrying...");
}
takeNap();
}
}
private static void takeNap() {
try {
Thread.sleep(10);
} catch (InterruptedException ie) {
// ignore
}
}
public void crash() {
try {
Files.writeString(path, "crash");
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
public void exit() {
try {
Files.writeString(path, "exit");
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
public long pid() {
return process.pid();
}
}