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/*
* Copyright (c) 2015, 2017, 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
* @summary Run multiple processes with the same archive, ensure they share
*
* @requires vm.cds
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* jdk.jartool/sun.tools.jar
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* @compile test-classes/MultiProcClass.java
* @run main MultiProcessSharing
*/
import java.io.File;
import jdk.test.lib.Asserts;
import jdk.test.lib.Platform;
import jdk.test.lib.process.OutputAnalyzer;
import sun.hotspot.WhiteBox;
public class MultiProcessSharing {
static String useWbJar;
static String sharedClass1Jar;
static boolean checkPmap = false;
public static void main(String[] args) throws Exception {
String wbJar = JarBuilder.build(true, "WhiteBox", "sun/hotspot/WhiteBox");
useWbJar = "-Xbootclasspath/a:" + wbJar;
sharedClass1Jar = JarBuilder.build("shared_class1", "MultiProcClass");
// create an archive
OutputAnalyzer out = TestCommon.dump(sharedClass1Jar,
TestCommon.list("MultiProcClass"), useWbJar);
TestCommon.checkDump(out);
// determine whether OK to use pmap for extra test verification
long myPid = ProcessHandle.current().pid();
checkPmap = (Platform.isLinux() && (MultiProcClass.runPmap(myPid, false) == 0));
System.out.println("MultiProcessSharing: checkPmap is " + checkPmap);
// use an archive in several processes concurrently
int numProcesses = 3;
Thread[] threads = new Thread[numProcesses];
ProcessHandler[] processHandlers = new ProcessHandler[numProcesses];
for (int i = 0; i < numProcesses; i++) {
processHandlers[i] = new ProcessHandler(i);
threads[i] = new Thread(processHandlers[i]);
}
for (Thread t : threads) {
t.start();
}
for (Thread t : threads) {
try {
t.join();
} catch (InterruptedException ie) {
throw ie;
}
}
// check results
for (ProcessHandler ph : processHandlers) {
TestCommon.checkExec(ph.out);
if (checkPmap && !TestCommon.isUnableToMap(ph.out)) {
checkPmapOutput(ph.out.getOutput());
}
}
}
static class ProcessHandler implements Runnable {
int processNumber;
OutputAnalyzer out;
ProcessHandler(int processNumber) {
this.processNumber = processNumber;
}
@Override
public void run() {
try {
out = TestCommon.exec(sharedClass1Jar,
"-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", useWbJar,
"MultiProcClass", "" + processNumber, "" + checkPmap);
} catch (Exception e) {
throw new RuntimeException("Error occurred when using archive, exec()" + e);
}
}
}
private static void checkPmapOutput(String stdio) {
System.out.println("Checking pmap output ...");
String[] lines = stdio.split("\n");
boolean foundJsa = false;
boolean foundReadOnlyJsaSection = false;
for (String line : lines) {
if (line.contains(TestCommon.getCurrentArchiveName()))
System.out.println(line);
foundJsa = true;
if (line.contains("r--")) {
foundReadOnlyJsaSection = true;
}
// On certain ARM platforms system maps r/o memory mapped files
// as r/x; see JDK-8145694 for details
if ( (Platform.isARM() || Platform.isAArch64()) && line.contains("r-x") ) {
foundReadOnlyJsaSection = true;
}
}
Asserts.assertTrue(foundJsa && foundReadOnlyJsaSection);
}
}
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