undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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/*
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* Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6173675
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* @summary Basic test of ThreadMXBean.getThreadAllocatedBytes(long[])
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* @author Paul Hohensee
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*/
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import java.lang.management.*;
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public class ThreadAllocatedMemoryArray {
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private static com.sun.management.ThreadMXBean mbean =
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(com.sun.management.ThreadMXBean)ManagementFactory.getThreadMXBean();
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private static boolean testFailed = false;
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private static boolean done = false;
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private static boolean done1 = false;
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private static Object obj = new Object();
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private static final int NUM_THREADS = 10;
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private static Thread[] threads = new Thread[NUM_THREADS];
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public static void main(String[] argv)
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throws Exception {
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if (!mbean.isThreadAllocatedMemorySupported()) {
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return;
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}
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// start threads, wait for them to block
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long[] ids = new long[NUM_THREADS];
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for (int i = 0; i < NUM_THREADS; i++) {
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threads[i] = new MyThread("MyThread-" + i);
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threads[i].start();
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ids[i] = threads[i].getId();
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}
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waitUntilThreadBlocked();
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// disable allocated memory measurement
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if (mbean.isThreadAllocatedMemoryEnabled()) {
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mbean.setThreadAllocatedMemoryEnabled(false);
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}
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if (mbean.isThreadAllocatedMemoryEnabled()) {
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throw new RuntimeException(
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"ThreadAllocatedMemory is expected to be disabled");
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}
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long sizes[] = mbean.getThreadAllocatedBytes(ids);
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if (sizes == null) {
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throw new RuntimeException("Null ThreadAllocatedBytes array returned");
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}
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for (int i = 0; i < NUM_THREADS; i++) {
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long s = sizes[i];
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if (s != -1) {
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throw new RuntimeException(
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"Invalid ThreadAllocatedBytes returned for thread " +
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threads[i].getName() + " = " + s + " expected = -1");
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}
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}
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// Enable allocated memory measurement
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if (!mbean.isThreadAllocatedMemoryEnabled()) {
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mbean.setThreadAllocatedMemoryEnabled(true);
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}
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if (!mbean.isThreadAllocatedMemoryEnabled()) {
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throw new RuntimeException(
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"ThreadAllocatedMemory is expected to be enabled");
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}
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sizes = mbean.getThreadAllocatedBytes(ids);
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for (int i = 0; i < NUM_THREADS; i++) {
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long s = sizes[i];
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if (s < 0) {
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throw new RuntimeException(
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"Invalid allocated bytes returned for thread " +
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threads[i].getName() + " = " + s);
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}
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}
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// let threads go and do some more allocation
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synchronized (obj) {
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done = true;
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obj.notifyAll();
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}
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// wait for threads to get going again. we don't care if we
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// catch them in mid-execution or if some of them haven't
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// restarted after we're done sleeping.
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goSleep(400);
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long[] afterSizes = mbean.getThreadAllocatedBytes(ids);
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for (int i = 0; i < NUM_THREADS; i++) {
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checkResult(threads[i], sizes[i], afterSizes[i]);
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}
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try {
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sizes = mbean.getThreadAllocatedBytes(null);
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} catch (NullPointerException e) {
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System.out.println(
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"Caught expected NullPointerException: " + e.getMessage());
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}
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try {
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ids[0] = 0;
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sizes = mbean.getThreadAllocatedBytes(ids);
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} catch (IllegalArgumentException e) {
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System.out.println(
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"Caught expected IllegalArgumentException: " + e.getMessage());
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}
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// let threads exit
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synchronized (obj) {
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done1 = true;
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obj.notifyAll();
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}
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for (int i = 0; i < NUM_THREADS; i++) {
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try {
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threads[i].join();
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} catch (InterruptedException e) {
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reportUnexpected(e, "during join");
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break;
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}
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}
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if (testFailed) {
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throw new RuntimeException("TEST FAILED");
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}
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System.out.println("Test passed");
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}
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private static void checkResult(Thread curThread,
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long prevSize, long currSize) {
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System.out.println(curThread.getName() +
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" Previous allocated bytes = " + prevSize +
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" Current allocated bytes = " + currSize);
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if (currSize < prevSize) {
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throw new RuntimeException("TEST FAILED: " +
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curThread.getName() +
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" previous allocated bytes = " + prevSize +
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" > current allocated bytes = " + currSize);
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}
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}
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private static void reportUnexpected(Exception e, String when) {
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System.out.println("Unexpected exception thrown " + when + ".");
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e.printStackTrace(System.out);
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testFailed = true;
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}
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private static void goSleep(long ms) throws Exception {
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try {
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Thread.sleep(ms);
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} catch (InterruptedException e) {
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throw e;
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}
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}
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private static void waitUntilThreadBlocked()
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throws Exception {
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int count = 0;
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while (count != NUM_THREADS) {
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goSleep(100);
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count = 0;
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for (int i = 0; i < NUM_THREADS; i++) {
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ThreadInfo info = mbean.getThreadInfo(threads[i].getId());
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if (info.getThreadState() == Thread.State.WAITING) {
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count++;
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}
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}
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}
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}
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public static void doit() {
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String tmp = "";
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long hashCode = 0;
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for (int counter = 0; counter < 1000; counter++) {
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tmp += counter;
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hashCode = tmp.hashCode();
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}
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System.out.println(Thread.currentThread().getName() +
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" hashcode: " + hashCode);
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}
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static class MyThread extends Thread {
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public MyThread(String name) {
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super(name);
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}
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public void run() {
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ThreadAllocatedMemoryArray.doit();
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synchronized (obj) {
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while (!done) {
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try {
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obj.wait();
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} catch (InterruptedException e) {
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reportUnexpected(e, "while !done");
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break;
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}
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}
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}
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ThreadAllocatedMemoryArray.doit();
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synchronized (obj) {
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while (!done1) {
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try {
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obj.wait();
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} catch (InterruptedException e) {
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reportUnexpected(e, "while !done");
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break;
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}
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}
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}
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}
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}
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}
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