| /* |
| * Copyright (c) 2002, 2018, 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 |
| * @key gc |
| * |
| * @summary converted from VM Testbase gc/gctests/mallocWithGC1. |
| * VM Testbase keywords: [gc] |
| * VM Testbase readme: |
| * LD_LIBRARY PATH must include "$TESTBASE/src/misc/gc/utils/lib/sparc(or i386)" |
| * while running these tests. The native code for all the mallocWithGC* tests |
| * has been bunched up into a single .so. |
| * In this test, 2 threads are created, one thread(javaHeapEater) |
| * creates garbage by nulling out the elements of a vector, which formerly |
| * held points to circular linked lists. These elements are again repopulated |
| * with new linked lists. The second thread invokes a native function |
| * that continually mallocs and frees one byte of memory for 3 minutes |
| * a hold on a malloc lock. |
| * The idea here is to see if the vm deadlocks (if it does, it is ofcourse |
| * a failure ). This test was created because of the following problem |
| * that the vm used to have : |
| * "The malloc/GC deadlock problem is that a gc may suspend a thread (in native |
| * or VM code) that is in the middle of a malloc, so it has the "malloc" lock. |
| * GC may want to do a malloc, but it can't get the lock, so it deadlocks. " |
| * |
| * @library /vmTestbase |
| * /test/lib |
| * @run driver jdk.test.lib.FileInstaller . . |
| * @run main/othervm/native/timeout=300 gc.gctests.mallocWithGC1.mallocWithGC1 |
| */ |
| |
| package gc.gctests.mallocWithGC1; |
| |
| import nsk.share.test.*; |
| import nsk.share.gc.*; |
| import nsk.share.TestFailure; |
| import java.util.Vector; |
| |
| public class mallocWithGC1 implements Test { |
| private int objectSize = 100; |
| |
| static { |
| System.loadLibrary("mallocWithGC1"); |
| } |
| |
| public native void getMallocLock01(); |
| |
| class javaHeapEater extends Thread { |
| private Vector v; |
| |
| public javaHeapEater(Vector v) { |
| this.v = v; |
| } |
| |
| public void run() throws OutOfMemoryError { |
| int gc_count; |
| |
| for(int i = 0; i < 5 ; i++) |
| v.addElement(buildCircularLinkedList()); |
| gc_count = 0; |
| while( gc_count < 10 ) { |
| |
| for(int i = 0; i < 5 ; i++) |
| v.setElementAt(null, i); |
| |
| for(int i = 0; i < 5 ; i++) |
| v.setElementAt(buildCircularLinkedList(),i); |
| |
| gc_count++; |
| System.out.println("Finished iteration # " + gc_count); |
| } |
| } |
| } |
| |
| class cHeapEater extends Thread{ |
| public void run() { |
| getMallocLock01(); |
| } |
| } |
| |
| public void run() { |
| Vector v = new Vector(5); |
| Thread tArray[] = new Thread[2]; |
| |
| tArray[0] = new javaHeapEater(v); |
| tArray[1] = new cHeapEater(); |
| |
| try { |
| for(int i = 0; i < tArray.length ; i++ ) |
| tArray[i].start(); |
| for(int i = 0; i < tArray.length ; i++ ) |
| tArray[i].join(); |
| } catch (Exception e) { |
| throw new TestFailure("Test Failed.", e); |
| } |
| System.out.println("Test Passed."); |
| } |
| |
| // build a circular linked list of 0.2 Meg |
| |
| private CircularLinkedList buildCircularLinkedList() { |
| CircularLinkedList cl = new CircularLinkedList(objectSize); |
| for(int i = 0; i < 2000; i++) |
| cl.grow(); |
| return cl; |
| } |
| |
| public static void main(String args[]){ |
| Tests.runTest(new mallocWithGC1(), args); |
| } |
| } |