--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/MultiProcessSharing.java	Thu Oct 17 20:53:35 2019 +0100
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ * 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 jdk.jartool/sun.tools.jar
+ * @build sun.hotspot.WhiteBox
+ * @run driver ClassFileInstaller sun.hotspot.WhiteBox
+ * @compile test-classes/MultiProcClass.java
+ * @run driver 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);
+    }
+
+}