Merge

jdk/src/java.management/share/classes/sun/management/Agent.java

@@ -345,6 +345,7 @@ public class Agent {
 
         if (jmxServer != null) {
             ConnectorBootstrap.unexportRegistry();
+            ConnectorAddressLink.unexportRemote();
 
             // Attempt to stop already stopped agent
             // Don't cause any errors.

jdk/src/java.management/share/classes/sun/management/ConnectorAddressLink.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2004, 2015, 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
@@ -27,6 +27,7 @@ package sun.management;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -45,9 +46,26 @@ import sun.management.counter.perf.PerfInstrumentation;
  * @since 1.5
  */
 public class ConnectorAddressLink {
+    /**
+     * A simple wrapper for the perf-counter backing {@linkplain ByteBuffer}
+     */
+    private static final class PerfHandle {
+        private ByteBuffer bb;
+
+        private PerfHandle(ByteBuffer bb) {
+            this.bb = bb.order(ByteOrder.nativeOrder());
+        }
+
+        private void putLong(long l) {
+            this.bb = bb.clear();
+            this.bb.asLongBuffer().put(l);
+        }
+    }
 
     private static final String CONNECTOR_ADDRESS_COUNTER =
             "sun.management.JMXConnectorServer.address";
+    private static final String REMOTE_CONNECTOR_STATE_COUNTER =
+            "sun.management.JMXConnectorServer.remote.enabled";
 
     /*
      * The format of the jvmstat counters representing the properties of
@@ -78,7 +96,9 @@ public class ConnectorAddressLink {
      * JMX remote connector counter (it will be incremented every
      * time a new out-of-the-box JMX remote connector is created).
      */
-    private static AtomicInteger counter = new AtomicInteger();
+    private static final AtomicInteger counter = new AtomicInteger();
+
+    private static PerfHandle remotePerfHandle = null;
 
     /**
      * Exports the specified connector address to the instrumentation buffer
@@ -93,7 +113,17 @@ public class ConnectorAddressLink {
         }
         Perf perf = Perf.getPerf();
         perf.createString(
-                CONNECTOR_ADDRESS_COUNTER, 1, Units.STRING.intValue(), address);
+            CONNECTOR_ADDRESS_COUNTER, 1, Units.STRING.intValue(), address);
+    }
+
+    public static void unexportRemote() {
+        unexport(remotePerfHandle);
+    }
+
+    private static void unexport(PerfHandle ph) {
+        if (ph != null) {
+            ph.putLong(-1L);
+        }
     }
 
     /**
@@ -143,6 +173,13 @@ public class ConnectorAddressLink {
             perf.createString(REMOTE_CONNECTOR_COUNTER_PREFIX + index + "." +
                     entry.getKey(), 1, Units.STRING.intValue(), entry.getValue());
         }
+        if (remotePerfHandle != null) {
+            remotePerfHandle.putLong(index);
+        } else {
+            remotePerfHandle = new PerfHandle(
+                perf.createLong(REMOTE_CONNECTOR_STATE_COUNTER, 1, Units.NONE.intValue(), (long)index)
+            );
+        }
     }
 
     /**

jdk/test/TEST.groups

@@ -598,6 +598,10 @@ needs_compact3 = \
   sun/security/jgss \
   sun/security/krb5 \
   java/lang/annotation/AnnotationType/AnnotationTypeDeadlockTest.java \
+  java/lang/invoke/lambda/LambdaStackTrace.java \
+  java/lang/invoke/LFCaching/LFGarbageCollectedTest.java \
+  java/lang/invoke/LFCaching/LFMultiThreadCachingTest.java \
+  java/lang/invoke/LFCaching/LFSingleThreadCachingTest.java \
   java/lang/System/MacEncoding/TestFileEncoding.java \
   java/nio/channels/AsynchronousSocketChannel/Leaky.java \
   java/security/PermissionCollection/Concurrent.java \

jdk/test/java/lang/instrument/PremainClass/NoPremainAgentTest.java

@@ -33,7 +33,7 @@ import jdk.testlibrary.Utils;
  * @modules java.management
  * @run build jdk.testlibrary.* DummyMain
  * @run shell ../MakeJAR3.sh NoPremainAgent
- * @run main NoPremainAgentTest
+ * @run main/othervm -XX:-CreateCoredumpOnCrash NoPremainAgentTest
  */
 public class NoPremainAgentTest {
     // Use a javaagent without the premain() function.

jdk/test/java/lang/instrument/PremainClass/ZeroArgPremainAgentTest.java

@@ -33,7 +33,7 @@ import jdk.testlibrary.Utils;
  * @modules java.management
  * @run build jdk.testlibrary.* DummyMain
  * @run shell ../MakeJAR3.sh ZeroArgPremainAgent
- * @run main ZeroArgPremainAgentTest
+ * @run main/othervm -XX:-CreateCoredumpOnCrash ZeroArgPremainAgentTest
  */
 public class ZeroArgPremainAgentTest {
     // Use a javaagent with a zero argument premain() function.

jdk/test/java/lang/management/ThreadMXBean/AllThreadIds.java

@@ -32,9 +32,30 @@
  */
 
 import java.lang.management.*;
+import java.time.Instant;
 import java.util.concurrent.Phaser;
+import java.util.function.Supplier;
 
 public class AllThreadIds {
+    /**
+     * A supplier wrapper for the delayed format printing.
+     * The supplied value will have to be formatted as <em>$s</em>
+     * @param <T> The wrapped type
+     */
+    private static final class ArgWrapper<T> {
+        private final Supplier<T> val;
+
+        public ArgWrapper(Supplier<T> val) {
+            this.val = val;
+        }
+
+        @Override
+        public String toString() {
+            T resolved = val.get();
+            return resolved != null ? resolved.toString() : null;
+        }
+    }
+
     final static int DAEMON_THREADS = 20;
     final static int USER_THREADS = 5;
     final static int ALL_THREADS = DAEMON_THREADS + USER_THREADS;
@@ -47,15 +68,10 @@ public class AllThreadIds {
     private static long prevTotalThreadCount = 0;
     private static int prevLiveThreadCount = 0;
     private static int prevPeakThreadCount = 0;
-    private static long curTotalThreadCount = 0;
-    private static int curLiveThreadCount = 0;
-    private static int curPeakThreadCount = 0;
 
     private static final Phaser startupCheck = new Phaser(ALL_THREADS + 1);
 
     private static void printThreadList() {
-        if (!trace) return;
-
         long[] list = mbean.getAllThreadIds();
         for (int i = 1; i <= list.length; i++) {
             System.out.println(i + ": Thread id = " + list[i-1]);
@@ -68,59 +84,13 @@ public class AllThreadIds {
         }
     }
 
-    private static void fail(String msg) {
-        trace = true;
-        printThreadList();
-        throw new RuntimeException(msg);
-    }
-
-    private static void checkThreadCount(int numNewThreads,
-                                         int numTerminatedThreads)
-        throws Exception {
-        prevTotalThreadCount = curTotalThreadCount;
-        prevLiveThreadCount = curLiveThreadCount;
-        prevPeakThreadCount = curPeakThreadCount;
-        curTotalThreadCount = mbean.getTotalStartedThreadCount();
-        curLiveThreadCount = mbean.getThreadCount();
-        curPeakThreadCount = mbean.getPeakThreadCount();
-
-        if ((curLiveThreadCount - prevLiveThreadCount) !=
-            (numNewThreads - numTerminatedThreads)) {
-            fail("Unexpected number of live threads: " +
-                " Prev live = " + prevLiveThreadCount +
-                " Current live = " + curLiveThreadCount +
-                " Threads added = " + numNewThreads +
-                " Threads terminated = " + numTerminatedThreads);
-        }
-        if (curPeakThreadCount - prevPeakThreadCount != numNewThreads) {
-            fail("Unexpected number of peak threads: " +
-                " Prev peak = " + prevPeakThreadCount +
-                " Current peak = " + curPeakThreadCount +
-                " Threads added = " + numNewThreads);
-        }
-        if (curTotalThreadCount - prevTotalThreadCount != numNewThreads) {
-            fail("Unexpected number of total threads: " +
-                " Prev Total = " + prevTotalThreadCount +
-                " Current Total = " + curTotalThreadCount +
-                " Threads added = " + numNewThreads);
-        }
-        long[] list = mbean.getAllThreadIds();
-        if (list.length != curLiveThreadCount) {
-            fail("Array length returned by " +
-                "getAllThreadIds() = " + list.length +
-                " not matched count = " + curLiveThreadCount);
-        }
-    }
-
-    public static void main(String args[]) throws Exception {
-        if (args.length > 0 && args[0].equals("trace")) {
-            trace = true;
-        }
-
-        curTotalThreadCount = mbean.getTotalStartedThreadCount();
-        curLiveThreadCount = mbean.getThreadCount();
-        curPeakThreadCount = mbean.getPeakThreadCount();
+    private static void checkInitialState() throws Exception {
+        updateCounters();
         checkThreadCount(0, 0);
+    }
+
+    private static void checkAllThreadsAlive() throws Exception {
+        updateCounters();
 
         // Start all threads and wait to be sure they all are alive
         for (int i = 0; i < ALL_THREADS; i++) {
@@ -133,8 +103,9 @@ public class AllThreadIds {
         startupCheck.arriveAndAwaitAdvance();
 
         checkThreadCount(ALL_THREADS, 0);
-        printThreadList();
-
+        if (trace) {
+            printThreadList();
+        }
         // Check mbean now. All threads must appear in getAllThreadIds() list
         long[] list = mbean.getAllThreadIds();
 
@@ -165,6 +136,10 @@ public class AllThreadIds {
         if (trace) {
             System.out.println();
         }
+    }
+
+    private static void checkDaemonThreadsDead() throws Exception {
+        updateCounters();
 
         // Stop daemon threads, wait to be sure they all are dead, and check
         // that they disappeared from getAllThreadIds() list
@@ -179,7 +154,7 @@ public class AllThreadIds {
         checkThreadCount(0, DAEMON_THREADS);
 
         // Check mbean now
-        list = mbean.getAllThreadIds();
+        long[] list = mbean.getAllThreadIds();
 
         for (int i = 0; i < ALL_THREADS; i++) {
             long expectedId = allThreads[i].getId();
@@ -208,6 +183,10 @@ public class AllThreadIds {
                 }
             }
         }
+    }
+
+    private static void checkAllThreadsDead() throws Exception {
+        updateCounters();
 
         // Stop all threads and wait to be sure they all are dead
         for (int i = DAEMON_THREADS; i < ALL_THREADS; i++) {
@@ -219,6 +198,127 @@ public class AllThreadIds {
 
         // and check the thread count
         checkThreadCount(0, ALL_THREADS - DAEMON_THREADS);
+    }
+
+    private static void checkThreadCount(int numNewThreads,
+                                         int numTerminatedThreads)
+        throws Exception {
+
+        checkLiveThreads(numNewThreads, numTerminatedThreads);
+        checkPeakThreads(numNewThreads);
+        checkTotalThreads(numNewThreads);
+        checkThreadIds();
+    }
+
+    private static void checkLiveThreads(int numNewThreads,
+                                         int numTerminatedThreads)
+        throws InterruptedException {
+        int diff = numNewThreads - numTerminatedThreads;
+
+        waitTillEquals(
+            diff + prevLiveThreadCount,
+            ()->(long)mbean.getThreadCount(),
+            "Unexpected number of live threads: " +
+                " Prev live = %1$d Current live = ${provided} Threads added = %2$d" +
+                " Threads terminated = %3$d",
+            ()->prevLiveThreadCount,
+            ()->numNewThreads,
+            ()->numTerminatedThreads
+        );
+    }
+
+    private static void checkPeakThreads(int numNewThreads)
+        throws InterruptedException {
+
+        waitTillEquals(numNewThreads + prevPeakThreadCount,
+            ()->(long)mbean.getPeakThreadCount(),
+            "Unexpected number of peak threads: " +
+                " Prev peak = %1$d Current peak = ${provided} Threads added = %2$d",
+            ()->prevPeakThreadCount,
+            ()->numNewThreads
+        );
+    }
+
+    private static void checkTotalThreads(int numNewThreads)
+        throws InterruptedException {
+
+        waitTillEquals(numNewThreads + prevTotalThreadCount,
+            ()->mbean.getTotalStartedThreadCount(),
+            "Unexpected number of total threads: " +
+                " Prev Total = %1$d Current Total = ${provided} Threads added = %2$d",
+            ()->prevTotalThreadCount,
+            ()->numNewThreads
+        );
+    }
+
+    private static void checkThreadIds() throws InterruptedException {
+        long[] list = mbean.getAllThreadIds();
+
+        waitTillEquals(
+            list.length,
+            ()->(long)mbean.getThreadCount(),
+            "Array length returned by " +
+                "getAllThreadIds() = %1$d not matched count = ${provided}",
+            ()->list.length
+        );
+    }
+
+    /**
+     * Waits till the <em>expectedVal</em> equals to the <em>retrievedVal</em>.
+     * It will report a status message on the first occasion of the value mismatch
+     * and then, subsequently, when the <em>retrievedVal</em> value changes.
+     * @param expectedVal The value to wait for
+     * @param retrievedVal The supplier of the value to check against the <em>expectedVal</em>
+     * @param msgFormat The formatted message to be printed in case of mismatch
+     * @param msgArgs The parameters to the formatted message
+     * @throws InterruptedException
+     */
+    private static void waitTillEquals(long expectedVal, Supplier<Long> retrievedVal,
+                                        String msgFormat, Supplier<Object> ... msgArgs)
+        throws InterruptedException {
+        Object[] args = null;
+
+        long countPrev = -1;
+        while (true) {
+            Long count = retrievedVal.get();
+            if (count == expectedVal) break;
+            if (countPrev == -1 || countPrev != count) {
+                if (args == null) {
+                    args = new Object[msgArgs.length];
+                    for(int i=0; i < msgArgs.length; i++) {
+                        args[i] = new ArgWrapper<>((Supplier<Object>)msgArgs[i]);
+                    }
+                }
+                System.err.format("TS: %s\n", Instant.now());
+                System.err.format(
+                    msgFormat
+                        .replace("${provided}", String.valueOf(count))
+                        .replace("$d", "$s"),
+                    args
+                ).flush();
+                printThreadList();
+                System.err.println("\nRetrying ...\n");
+            }
+            countPrev = count;
+            Thread.sleep(1);
+        }
+    }
+
+    private static void updateCounters() {
+        prevTotalThreadCount = mbean.getTotalStartedThreadCount();
+        prevLiveThreadCount = mbean.getThreadCount();
+        prevPeakThreadCount = mbean.getPeakThreadCount();
+    }
+
+    public static void main(String args[]) throws Exception {
+        if (args.length > 0 && args[0].equals("trace")) {
+            trace = true;
+        }
+
+        checkInitialState();
+        checkAllThreadsAlive();
+        checkDaemonThreadsDead();
+        checkAllThreadsDead();
 
         if (testFailed)
             throw new RuntimeException("TEST FAILED.");

jdk/test/javax/management/remote/mandatory/notif/ListenerScaleTest.java

@@ -21,12 +21,16 @@
  * questions.
  */
 
-/*
+/**
  * @test
  * @bug 6338874
  * @summary Check that notification dispatch is not linear in number of MBeans.
  * @author Eamonn McManus
  * @modules java.management
+ *
+ * @library /lib/testlibrary
+ * @run build jdk.testlibrary.* ListenerScaleTest
+ * @run main ListenerScaleTest
  */
 
 /*
@@ -67,6 +71,8 @@ import javax.management.remote.JMXConnectorServer;
 import javax.management.remote.JMXConnectorServerFactory;
 import javax.management.remote.JMXServiceURL;
 
+import jdk.testlibrary.Platform;
+
 public class ListenerScaleTest {
     private static final int WARMUP_WITH_ONE_MBEAN = 1000;
     private static final int NOTIFS_TO_TIME = 100;
@@ -126,6 +132,10 @@ public class ListenerScaleTest {
         };
 
     public static void main(String[] args) throws Exception {
+        if (Platform.isDebugBuild()) {
+            System.out.println("Running on a debug build. Performance test not applicable. Skipping.");
+            return;
+        }
         MBeanServer mbs = MBeanServerFactory.newMBeanServer();
         Sender sender = new Sender();
         mbs.registerMBean(sender, testObjectName);

jdk/test/sun/management/jmxremote/bootstrap/JvmstatCountersTest.java

@@ -116,10 +116,10 @@ public class JvmstatCountersTest {
                     throw new IllegalArgumentException("Test case 3 failed");
                 }
                 for (String key : remoteData.keySet()) {
-                    if (!key.startsWith("sun.management.JMXConnectorServer.0.")) {
+                    if (!isKeyAcceptable(key)) {
                         System.out.println("Test FAILED! The OOTB management " +
                                 "agent shouldn't publish anything which isn't " +
-                                "related to the remote connector.");
+                                "related to the remote connector (" + key + ").");
                         throw new IllegalArgumentException("Test case 3 failed");
                     }
                 }
@@ -165,10 +165,10 @@ public class JvmstatCountersTest {
                     throw new IllegalArgumentException("Test case 4 failed");
                 }
                 for (String key : remoteData2.keySet()) {
-                    if (!key.startsWith("sun.management.JMXConnectorServer.0.")) {
+                    if (!isKeyAcceptable(key)) {
                         System.out.println("Test FAILED! The OOTB management " +
                                 "agent shouldn't publish anything which isn't " +
-                                "related to the remote connector.");
+                                "related to the remote connector (" + key + ").");
                         throw new IllegalArgumentException("Test case 4 failed");
                     }
                 }
@@ -184,4 +184,9 @@ public class JvmstatCountersTest {
         }
         System.out.println("Bye! Bye!");
     }
+
+    private static boolean isKeyAcceptable(String key) {
+        return key.startsWith("sun.management.JMXConnectorServer.0.") ||
+               key.startsWith("sun.management.JMXConnectorServer.remote.enabled");
+    }
 }

jdk/test/sun/management/jmxremote/startstop/JMXStatusPerfCountersTest.java

@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import java.io.IOException;
+import java.net.BindException;
+import java.util.Properties;
+import java.util.function.Predicate;
+import static org.testng.Assert.*;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.BeforeTest;
+import org.testng.annotations.Test;
+
+import jdk.testlibrary.ProcessTools;
+
+
+/**
+ * @test
+ * @bug 8075926
+ * @summary Makes sure that the current management agent status is reflected
+ *          in the related performance counters.
+ * @library /lib/testlibrary
+ * @build jdk.testlibrary.* PortAllocator TestApp ManagementAgentJcmd
+ * @run testng/othervm -XX:+UsePerfData JMXStatusPerfCountersTest
+ */
+public class JMXStatusPerfCountersTest {
+    private final static String TEST_APP_NAME = "TestApp";
+
+    private final static String REMOTE_STATUS_KEY = "sun.management.JMXConnectorServer.remote.enabled";
+
+    private static ProcessBuilder testAppPb;
+    private Process testApp;
+
+    private ManagementAgentJcmd jcmd;
+
+    @BeforeClass
+    public static void setupClass() throws Exception {
+        testAppPb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UsePerfData",
+            "-cp", System.getProperty("test.class.path"),
+            TEST_APP_NAME
+        );
+    }
+
+    @BeforeTest
+    public void setup() {
+        jcmd = new ManagementAgentJcmd(TEST_APP_NAME, false);
+    }
+
+    @BeforeMethod
+    public void startTestApp() throws Exception {
+        testApp = ProcessTools.startProcess(
+            TEST_APP_NAME, testAppPb,
+            (Predicate<String>)l->l.trim().equals("main enter")
+        );
+    }
+
+    @AfterMethod
+    public void stopTestApp() throws Exception {
+        testApp.getOutputStream().write(1);
+        testApp.getOutputStream().flush();
+        testApp.waitFor();
+        testApp = null;
+    }
+
+    /**
+     * The 'sun.management.JMXConnectorServer.remote.enabled' counter must not be
+     * exported if the remote agent is not enabled.
+     * @throws Exception
+     */
+    @Test
+    public void testNotInitializedRemote() throws Exception {
+        assertFalse(
+            getCounters().containsKey(REMOTE_STATUS_KEY),
+            "Unexpected occurrence of " + REMOTE_STATUS_KEY + " in perf counters"
+        );
+    }
+
+    /**
+     * After enabling the remote agent the 'sun.management.JMXConnectorServer.remote.enabled'
+     * counter will be exported with value of '0' - corresponding to the actual
+     * version of the associated remote connector perf counters.
+     * @throws Exception
+     */
+    @Test
+    public void testRemoteEnabled() throws Exception {
+        while (true) {
+            try {
+                int[] ports = PortAllocator.allocatePorts(1);
+                jcmd.start(
+                    "jmxremote.port=" + ports[0],
+                    "jmxremote.authenticate=false",
+                    "jmxremote.ssl=false"
+                );
+                String v = getCounters().getProperty(REMOTE_STATUS_KEY);
+                assertNotNull(v);
+                assertEquals("0", v);
+                return;
+            } catch (BindException e) {
+                System.out.println("Failed to allocate ports. Retrying ...");
+            }
+        }
+    }
+
+    /**
+     * After disabling the remote agent the value of 'sun.management.JMXConnectorServer.remote.enabled'
+     * counter will become '-1'.
+     * @throws Exception
+     */
+    @Test
+    public void testRemoteDisabled() throws Exception {
+        while (true) {
+            try {
+                int[] ports = PortAllocator.allocatePorts(1);
+                jcmd.start(
+                    "jmxremote.port=" + ports[0],
+                    "jmxremote.authenticate=false",
+                    "jmxremote.ssl=false"
+                );
+                jcmd.stop();
+                String v = getCounters().getProperty(REMOTE_STATUS_KEY);
+                assertNotNull(v);
+                assertEquals("-1", v);
+                return;
+            } catch (BindException e) {
+                System.out.println("Failed to allocate ports. Retrying ...");
+            }
+        }
+    }
+
+    /**
+     * Each subsequent re-enablement of the remote agent must keep the value of
+     * 'sun.management.JMXConnectorServer.remote.enabled' counter in sync with
+     * the actual version of the associated remote connector perf counters.
+     * @throws Exception
+     */
+    @Test
+    public void testRemoteReEnabled() throws Exception {
+        while (true) {
+            try {
+                int[] ports = PortAllocator.allocatePorts(1);
+                jcmd.start(
+                    "jmxremote.port=" + ports[0],
+                    "jmxremote.authenticate=false",
+                    "jmxremote.ssl=false"
+                );
+                jcmd.stop();
+                jcmd.start(
+                    "jmxremote.port=" + ports[0],
+                    "jmxremote.authenticate=false",
+                    "jmxremote.ssl=false"
+                );
+
+                String v = getCounters().getProperty(REMOTE_STATUS_KEY);
+                assertNotNull(v);
+                assertEquals("1", v);
+                return;
+            } catch (BindException e) {
+                System.out.println("Failed to allocate ports. Retrying ...");
+            }
+        }
+    }
+
+    private Properties getCounters() throws IOException, InterruptedException {
+        return jcmd.perfCounters("sun\\.management\\.JMXConnectorServer\\..*");
+    }
+}

jdk/test/sun/management/jmxremote/startstop/ManagementAgentJcmd.java

@@ -25,8 +25,10 @@ import java.net.BindException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Properties;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Consumer;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import sun.management.Agent;
 import sun.management.AgentConfigurationError;
@@ -43,6 +45,7 @@ final class ManagementAgentJcmd {
     private static final String CMD_START = "ManagementAgent.start";
     private static final String CMD_START_LOCAL = "ManagementAgent.start_local";
     private static final String CMD_STATUS = "ManagementAgent.status";
+    private static final String CMD_PRINTPERF = "PerfCounter.print";
 
     private final String id;
     private final boolean verbose;
@@ -62,6 +65,39 @@ final class ManagementAgentJcmd {
         return jcmd();
     }
 
+    /**
+     * `jcmd PerfCounter.print`
+     * @return Returns the available performance counters with their values as
+     *         {@linkplain Properties} instance
+     * @throws IOException
+     * @throws InterruptedException
+     */
+    public Properties perfCounters() throws IOException, InterruptedException {
+        return perfCounters(".*");
+    }
+
+    /**
+     * `jcmd PerfCounter.print | grep {exp}>`
+     * @param regex Regular expression for including perf counters in the result
+     * @return Returns the matching performance counters with their values
+     *         as {@linkplain Properties} instance
+     * @throws IOException
+     * @throws InterruptedException
+     */
+    public Properties perfCounters(String regex) throws IOException, InterruptedException {
+        Pattern pat = Pattern.compile(regex);
+        Properties p = new Properties();
+        for(String l : jcmd(CMD_PRINTPERF).split("\\n")) {
+            String[] kv = l.split("=");
+            if (kv.length > 1) {
+                if (pat.matcher(kv[0]).matches()) {
+                    p.setProperty(kv[0], kv[1].replace("\"", ""));
+                }
+            }
+        }
+        return p;
+    }
+
     /**
      * `jcmd <app> ManagementAgent.stop`
      * @return The JCMD output