134 lines
4.8 KiB
Java
134 lines
4.8 KiB
Java
/*
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* Copyright (c) 2002, 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 gc
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*
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* @summary converted from VM Testbase gc/gctests/mallocWithGC1.
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* VM Testbase keywords: [gc]
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* VM Testbase readme:
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* LD_LIBRARY PATH must include "$TESTBASE/src/misc/gc/utils/lib/sparc(or i386)"
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* while running these tests. The native code for all the mallocWithGC* tests
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* has been bunched up into a single .so.
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* In this test, 2 threads are created, one thread(javaHeapEater)
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* creates garbage by nulling out the elements of a vector, which formerly
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* held points to circular linked lists. These elements are again repopulated
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* with new linked lists. The second thread invokes a native function
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* that continually mallocs and frees one byte of memory for 3 minutes
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* a hold on a malloc lock.
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* The idea here is to see if the vm deadlocks (if it does, it is ofcourse
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* a failure ). This test was created because of the following problem
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* that the vm used to have :
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* "The malloc/GC deadlock problem is that a gc may suspend a thread (in native
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* or VM code) that is in the middle of a malloc, so it has the "malloc" lock.
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* GC may want to do a malloc, but it can't get the lock, so it deadlocks. "
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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/native/timeout=300 gc.gctests.mallocWithGC1.mallocWithGC1
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*/
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package gc.gctests.mallocWithGC1;
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import nsk.share.test.*;
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import nsk.share.gc.*;
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import nsk.share.TestFailure;
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import java.util.Vector;
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public class mallocWithGC1 implements Test {
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private int objectSize = 100;
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static {
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System.loadLibrary("mallocWithGC1");
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}
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public native void getMallocLock01();
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class javaHeapEater extends Thread {
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private Vector v;
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public javaHeapEater(Vector v) {
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this.v = v;
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}
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public void run() throws OutOfMemoryError {
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int gc_count;
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for(int i = 0; i < 5 ; i++)
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v.addElement(buildCircularLinkedList());
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gc_count = 0;
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while( gc_count < 10 ) {
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for(int i = 0; i < 5 ; i++)
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v.setElementAt(null, i);
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for(int i = 0; i < 5 ; i++)
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v.setElementAt(buildCircularLinkedList(),i);
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gc_count++;
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System.out.println("Finished iteration # " + gc_count);
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}
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}
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}
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class cHeapEater extends Thread{
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public void run() {
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getMallocLock01();
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}
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}
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public void run() {
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Vector v = new Vector(5);
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Thread tArray[] = new Thread[2];
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tArray[0] = new javaHeapEater(v);
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tArray[1] = new cHeapEater();
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try {
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for(int i = 0; i < tArray.length ; i++ )
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tArray[i].start();
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for(int i = 0; i < tArray.length ; i++ )
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tArray[i].join();
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} catch (Exception e) {
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throw new TestFailure("Test Failed.", e);
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}
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System.out.println("Test Passed.");
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}
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// build a circular linked list of 0.2 Meg
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private CircularLinkedList buildCircularLinkedList() {
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CircularLinkedList cl = new CircularLinkedList(objectSize);
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for(int i = 0; i < 2000; i++)
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cl.grow();
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return cl;
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}
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public static void main(String args[]){
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Tests.runTest(new mallocWithGC1(), args);
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}
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}
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