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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test/jdk/java/lang/management/ClassLoadingMXBean/LoadCounts.java
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143
test/jdk/java/lang/management/ClassLoadingMXBean/LoadCounts.java
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/*
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* Copyright (c) 2003, 2020, 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 4530538
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* @summary Basic unit test of ClassLoadingMXBean.getLoadedClassCount()
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* ClassLoadingMXBean.getTotalLoadedClassCount()
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* ClassLoadingMXBean.getUnloadedClassCount()
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* @author Alexei Guibadoulline
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*
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* @run main/othervm LoadCounts
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*/
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import java.lang.management.*;
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public class LoadCounts {
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private static ClassLoadingMXBean mbean
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= ManagementFactory.getClassLoadingMXBean();
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public static void main(String argv[]) throws Exception {
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// Get current count
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int classesNowPrev = mbean.getLoadedClassCount();
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long classesTotalPrev = mbean.getTotalLoadedClassCount();
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System.out.println("Loading 4 classes with the system class loader");
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new SimpleOne();
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new SimpleTwo();
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new Chain();
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int classesNow = mbean.getLoadedClassCount();
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long classesTotal = mbean.getTotalLoadedClassCount();
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if (classesNow > classesTotal)
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throw new RuntimeException("getLoadedClassCount() > "
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+ "getTotalLoadedClassCount()");
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if (classesNowPrev + 4 > classesNow)
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throw new RuntimeException("Number of loaded classes is "
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+ "expected to be at least "
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+ (classesNowPrev + 4) + ", but "
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+ "MBean.getLoadedClassCount() returned "
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+ classesNow);
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if (classesTotalPrev + 4 > classesTotal)
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throw new RuntimeException("Total number of loaded classes is "
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+ "expected to be at least "
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+ (classesTotalPrev + 4) + ", but "
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+ "MBean.getTotalLoadedClassCount() "
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+ "returned " + classesTotal);
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System.out.println("Creating new class loader instances");
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LeftHand leftHand = new LeftHand();
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RightHand rightHand = new RightHand();
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LoaderForTwoInstances ins1 = new LoaderForTwoInstances();
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LoaderForTwoInstances ins2 = new LoaderForTwoInstances();
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// Load different type of classes with different
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// initiating classloaders but the same defining class loader.
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System.out.println("Loading 2 class instances; each by " +
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"2 initiating class loaders.");
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classesNowPrev = mbean.getLoadedClassCount();
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classesTotalPrev = mbean.getTotalLoadedClassCount();
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try {
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Class.forName("Body", true, leftHand);
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Class.forName("Body", true, rightHand);
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Class.forName("TheSameClass", true, ins1);
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Class.forName("TheSameClass", true, ins2);
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} catch (ClassNotFoundException e) {
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System.out.println("Unexpected excetion " + e);
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e.printStackTrace(System.out);
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throw new RuntimeException();
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}
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classesNow = mbean.getLoadedClassCount();
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classesTotal = mbean.getTotalLoadedClassCount();
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// Expected 2 classes got loaded since they are loaded by
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// same defining class loader
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if (classesNowPrev + 2 > classesNow)
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throw new RuntimeException("Number of loaded classes is "
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+ "expected to be at least "
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+ (classesNowPrev + 4) + ", but "
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+ "MBean.getLoadedClassCount() returned "
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+ classesNow);
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if (classesTotalPrev + 2 > classesTotal)
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throw new RuntimeException("Total number of loaded classes is "
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+ "expected to be at least "
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+ (classesTotalPrev + 4) + ", but "
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+ "MBean.getTotalLoadedClassCount() "
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+ "returned " + classesTotal);
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System.out.println("Test passed.");
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}
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}
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class SimpleOne {}
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class SimpleTwo {}
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class Chain {
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Worker worker = new Worker();
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}
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class Worker {}
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class LeftHand extends ClassLoader {
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public LeftHand() {
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super(LeftHand.class.getClassLoader());
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}
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}
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class RightHand extends ClassLoader {
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public RightHand() {
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super(RightHand.class.getClassLoader());
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}
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}
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class Body {}
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class LoaderForTwoInstances extends ClassLoader {
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public LoaderForTwoInstances() {
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super(LoaderForTwoInstances.class.getClassLoader());
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}
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}
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class TheSameClass {}
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@ -0,0 +1,84 @@
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/*
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* Copyright (c) 2024, 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 8338139
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* @summary Basic unit test of ClassLoadingMXBean.set/isVerbose() when
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* related unified logging is enabled.
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*
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* @run main/othervm -Xlog:class+load=trace:file=vm.log TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=debug:file=vm.log TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=info:file=vm.log TestVerboseClassLoading false
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*
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* @run main/othervm -Xlog:class+load=trace TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=debug TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=info TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=warning TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=error TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load=off TestVerboseClassLoading false
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*
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* @run main/othervm -Xlog:class+load*=trace TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=debug TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=info TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=warning TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load*=error TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load*=off TestVerboseClassLoading false
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*
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=trace TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=debug TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=info TestVerboseClassLoading true
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=warning TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=error TestVerboseClassLoading false
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* @run main/othervm -Xlog:class+load*=info,class+load+cause=off TestVerboseClassLoading false
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*
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* @run main/othervm -Xlog:all=trace:file=vm.log TestVerboseClassLoading false
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*/
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import java.lang.management.ManagementFactory;
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import java.lang.management.ClassLoadingMXBean;
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public class TestVerboseClassLoading {
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public static void main(String[] args) throws Exception {
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ClassLoadingMXBean mxBean = ManagementFactory.getClassLoadingMXBean();
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boolean expected = Boolean.parseBoolean(args[0]);
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boolean initial = mxBean.isVerbose();
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if (expected != initial) {
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throw new Error("Initial verbosity setting was unexpectedly " + initial);
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}
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mxBean.setVerbose(false);
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if (mxBean.isVerbose()) {
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throw new Error("Verbosity was still enabled");
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}
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mxBean.setVerbose(true);
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if (!mxBean.isVerbose()) {
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throw new Error("Verbosity was still disabled");
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}
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// Turn off again as a double-check and also to avoid excessive logging
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mxBean.setVerbose(false);
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if (mxBean.isVerbose()) {
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throw new Error("Verbosity was still enabled");
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}
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}
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}
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