62 lines
2.9 KiB
Java
62 lines
2.9 KiB
Java
/*
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* Copyright (c) 2017, 2018, 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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* @key stress gc
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*
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* @summary converted from VM Testbase gc/gctests/PhantomReference/phantom002.
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* VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
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* VM Testbase readme:
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* DESCRIPTION
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* The test checks that Garbage Collector correctly works with
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* PhantomReferences. It also checks that no unexpected exceptions and errors
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* are thrown or the JVM is not crashed.
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* The test starts a number of threads. Each thread run tests for some time
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* or serveral iterations. See javadoc StressOptions for configuration.
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* First of all each thread defines what type to check (there are 11 types
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* totally). As soon as the type is defined, a PhantomRefence is created that
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* refers to an array of tested type and is registered with in a queue. A
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* PhantomRefence for NonbranchyTree and Referent calsses does not refer to
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* arrays, but to instances of the classes.
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* After that a thread performs next checks for the reference:
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* 1. The reference is in queue after GC is provoked with
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* Algorithms.eatMemory() method (a single thread eats the memory).
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* 2. reference.get() returns null.
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* 3. queue.poll() returns the reference that was created.
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* 4. queue.poll() again returns null.
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* 5. If the checked type is class (Referent), then it must be finalized,
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* since the reference is already enqueued.
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* 6. reference.clear() does not throw any exception.
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* The test extends ThreadedGCTest and implements GarbageProducerAware and
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* MemoryStrategyAware interfaces. The corresponding javadoc documentation
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* for additional test configuration.
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*
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* @library /vmTestbase
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* /test/lib
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* @run driver jdk.test.lib.FileInstaller . .
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* @run main/othervm gc.gctests.PhantomReference.phantom001.phantom001 -ms high
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*/
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