--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/com/sun/management/ThreadMXBean/ThreadAllocatedMemory.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2011, 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.
+ */
+
+/*
+ * @test
+ * @bug 6173675
+ * @summary Basic test of ThreadMXBean.getThreadAllocatedBytes
+ * @author Paul Hohensee
+ */
+
+import java.lang.management.*;
+
+public class ThreadAllocatedMemory {
+ private static com.sun.management.ThreadMXBean mbean =
+ (com.sun.management.ThreadMXBean)ManagementFactory.getThreadMXBean();
+ private static boolean testFailed = false;
+ private static boolean done = false;
+ private static boolean done1 = false;
+ private static Object obj = new Object();
+ private static final int NUM_THREADS = 10;
+ private static Thread[] threads = new Thread[NUM_THREADS];
+ private static long[] sizes = new long[NUM_THREADS];
+
+ public static void main(String[] argv)
+ throws Exception {
+
+ if (!mbean.isThreadAllocatedMemorySupported()) {
+ return;
+ }
+
+ // disable allocated memory measurement
+ if (mbean.isThreadAllocatedMemoryEnabled()) {
+ mbean.setThreadAllocatedMemoryEnabled(false);
+ }
+
+ if (mbean.isThreadAllocatedMemoryEnabled()) {
+ throw new RuntimeException(
+ "ThreadAllocatedMemory is expected to be disabled");
+ }
+
+ Thread curThread = Thread.currentThread();
+ long id = curThread.getId();
+
+ long s = mbean.getThreadAllocatedBytes(id);
+ if (s != -1) {
+ throw new RuntimeException(
+ "Invalid ThreadAllocatedBytes returned = " +
+ s + " expected = -1");
+ }
+
+ // enable allocated memory measurement
+ if (!mbean.isThreadAllocatedMemoryEnabled()) {
+ mbean.setThreadAllocatedMemoryEnabled(true);
+ }
+
+ if (!mbean.isThreadAllocatedMemoryEnabled()) {
+ throw new RuntimeException(
+ "ThreadAllocatedMemory is expected to be enabled");
+ }
+
+ long size = mbean.getThreadAllocatedBytes(id);
+ // implementation could have started measurement when
+ // measurement was enabled, in which case size can be 0
+ if (size < 0) {
+ throw new RuntimeException(
+ "Invalid allocated bytes returned = " + size);
+ }
+
+ doit();
+
+ // Expected to be size1 >= size
+ long size1 = mbean.getThreadAllocatedBytes(id);
+ if (size1 < size) {
+ throw new RuntimeException("Allocated bytes " + size1 +
+ " expected >= " + size);
+ }
+ System.out.println(curThread.getName() +
+ " Current thread allocated bytes = " + size +
+ " allocated bytes = " + size1);
+
+
+ // start threads, wait for them to block
+ for (int i = 0; i < NUM_THREADS; i++) {
+ threads[i] = new MyThread("MyThread-" + i);
+ threads[i].start();
+ }
+
+ // threads block after doing some allocation
+ waitUntilThreadBlocked();
+
+ for (int i = 0; i < NUM_THREADS; i++) {
+ sizes[i] = mbean.getThreadAllocatedBytes(threads[i].getId());
+ }
+
+ // let threads go and do some more allocation
+ synchronized (obj) {
+ done = true;
+ obj.notifyAll();
+ }
+
+ // wait for threads to get going again. we don't care if we
+ // catch them in mid-execution or if some of them haven't
+ // restarted after we're done sleeping.
+ goSleep(400);
+
+ for (int i = 0; i < NUM_THREADS; i++) {
+ long newSize = mbean.getThreadAllocatedBytes(threads[i].getId());
+ if (sizes[i] > newSize) {
+ throw new RuntimeException("TEST FAILED: " +
+ threads[i].getName() +
+ " previous allocated bytes = " + sizes[i] +
+ " > current allocated bytes = " + newSize);
+ }
+ System.out.println(threads[i].getName() +
+ " Previous allocated bytes = " + sizes[i] +
+ " Current allocated bytes = " + newSize);
+ }
+
+ // let threads exit
+ synchronized (obj) {
+ done1 = true;
+ obj.notifyAll();
+ }
+
+ for (int i = 0; i < NUM_THREADS; i++) {
+ try {
+ threads[i].join();
+ } catch (InterruptedException e) {
+ System.out.println("Unexpected exception is thrown.");
+ e.printStackTrace(System.out);
+ testFailed = true;
+ break;
+ }
+ }
+ if (testFailed) {
+ throw new RuntimeException("TEST FAILED");
+ }
+
+ System.out.println("Test passed");
+ }
+
+
+ private static void goSleep(long ms) throws Exception {
+ try {
+ Thread.sleep(ms);
+ } catch (InterruptedException e) {
+ System.out.println("Unexpected exception is thrown.");
+ throw e;
+ }
+ }
+
+ private static void waitUntilThreadBlocked()
+ throws Exception {
+ int count = 0;
+ while (count != NUM_THREADS) {
+ goSleep(100);
+ count = 0;
+ for (int i = 0; i < NUM_THREADS; i++) {
+ ThreadInfo info = mbean.getThreadInfo(threads[i].getId());
+ if (info.getThreadState() == Thread.State.WAITING) {
+ count++;
+ }
+ }
+ }
+ }
+
+ public static void doit() {
+ String tmp = "";
+ long hashCode = 0;
+ for (int counter = 0; counter < 1000; counter++) {
+ tmp += counter;
+ hashCode = tmp.hashCode();
+ }
+ System.out.println(Thread.currentThread().getName() +
+ " hashcode: " + hashCode);
+ }
+
+ static class MyThread extends Thread {
+ public MyThread(String name) {
+ super(name);
+ }
+
+ public void run() {
+ ThreadAllocatedMemory.doit();
+
+ synchronized (obj) {
+ while (!done) {
+ try {
+ obj.wait();
+ } catch (InterruptedException e) {
+ System.out.println("Unexpected exception is thrown.");
+ e.printStackTrace(System.out);
+ testFailed = true;
+ break;
+ }
+ }
+ }
+
+ long size1 = mbean.getThreadAllocatedBytes(getId());
+ ThreadAllocatedMemory.doit();
+ long size2 = mbean.getThreadAllocatedBytes(getId());
+
+ System.out.println(getName() + ": " +
+ "ThreadAllocatedBytes = " + size1 +
+ " ThreadAllocatedBytes = " + size2);
+
+ if (size1 > size2) {
+ throw new RuntimeException("TEST FAILED: " + getName() +
+ " ThreadAllocatedBytes = " + size1 +
+ " > ThreadAllocatedBytes = " + size2);
+ }
+
+ synchronized (obj) {
+ while (!done1) {
+ try {
+ obj.wait();
+ } catch (InterruptedException e) {
+ System.out.println("Unexpected exception is thrown.");
+ e.printStackTrace(System.out);
+ testFailed = true;
+ break;
+ }
+ }
+ }
+ }
+ }
+}