--- a/test/hotspot/jtreg/gc/cms/TestBubbleUpRef.java Fri Nov 08 14:54:17 2019 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,188 +0,0 @@
-/*
- * Copyright (c) 2004, 2019, 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.
- */
-
-package gc.cms;
-
-import java.lang.ref.ReferenceQueue;
-import java.lang.ref.WeakReference;
-import java.util.LinkedList;
-import java.util.ListIterator;
-
-/*
- * @test
- * @requires vm.gc.ConcMarkSweep & !vm.graal.enabled
- * @key cte_test
- * @bug 4950157
- * @summary Stress the behavior of ergonomics when the heap is nearly full and
- * stays nearly full.
- * @run main/othervm
- * -XX:+UseConcMarkSweepGC -XX:-CMSYield -XX:-CMSPrecleanRefLists1
- * -XX:CMSInitiatingOccupancyFraction=0 -Xmx80m gc.cms.TestBubbleUpRef 16000 50 10000
- */
-
-/**
- * Test program to stress the behavior of ergonomics when the
- * heap is nearly full and stays nearly full.
- * This is a test to catch references that have been discovered
- * during concurrent marking and whose referents have been
- * cleared by the mutator.
- * Allocate objects with weak references until the heap is full
- * Free the objects.
- * Do work so that concurrent marking has a chance to work
- * Clear the referents out of the weak references
- * System.gc() in the hopes that it will acquire the collection
- * Free the weak references
- * Do it again.
- *
- * Use the following VM options
- * -Xmx80m -XX:-CMSYield [-XX:+UseConcMarkSweepGC] -XX:-CMSPrecleanRefLists1
- * -XX:CMSInitiatingOccupancyFraction=0
- *
- * Use parameter:
- * args[0] - array size (16000)
- * args[1] - iterations (50)
- * args[2] - work (10000)
- */
-class MyList extends LinkedList {
-
- int[] a;
-
- MyList(int size) {
- a = new int[size];
- }
-}
-
-class MyRefList extends LinkedList {
-
- WeakReference ref;
-
- MyRefList(Object o, ReferenceQueue rq) {
- ref = new WeakReference(o, rq);
- }
-
- void clearReferent() {
- ref.clear();
- }
-}
-
-public class TestBubbleUpRef {
-
- MyList list;
- MyRefList refList;
- ReferenceQueue rq;
- int refListLen;
- int arraySize;
- int iterations;
- int workUnits;
-
- TestBubbleUpRef(int as, int cnt, int wk) {
- arraySize = as;
- iterations = cnt;
- workUnits = wk;
- list = new MyList(arraySize);
- refList = new MyRefList(list, rq);
- }
-
- public void fill() {
- System.out.println("fill() " + iterations + " times");
- int count = 0;
- while (true) {
- try {
- // Allocations
- MyList next = new MyList(arraySize);
- list.add(next);
- MyRefList nextRef = new MyRefList(next, rq);
- refList.add(nextRef);
- } catch (OutOfMemoryError e) {
- // When the heap is full
- try {
- if (count++ > iterations) {
- return;
- }
- System.out.println("Freeing list");
- while (!list.isEmpty()) {
- list.removeFirst();
- }
- System.out.println("Doing work");
- int j = 0;
- for (int i = 1; i < workUnits; i++) {
- j = j + i;
- }
- System.out.println("Clearing refs");
- ListIterator listIt = refList.listIterator();
- while (listIt.hasNext()) {
- MyRefList next = (MyRefList) listIt.next();
- next.clearReferent();
- }
- System.gc();
- System.out.println("Freeing refs");
- while (!refList.isEmpty()) {
- refList.removeFirst();
- }
- } catch (OutOfMemoryError e2) {
- System.err.println("Out of Memory - 2 ");
- continue;
- }
- } catch (Exception e) {
- System.err.println("Unexpected exception: " + e);
- return;
- }
- }
- }
-
- /**
- * Test entry point.
- * args[0] - array size (is the size of the int array in a list item)
- * args[1] - iterations (is the number of out-of-memory exceptions before exit)
- * args[2] - work (is the work done between allocations)
- * @param args
- */
- public static void main(String[] args) {
- // Get the input parameters.
- if (args.length != 3) {
- throw new IllegalArgumentException("Wrong number of input argumets");
- }
-
- int as = Integer.parseInt(args[0]);
- int cnt = Integer.parseInt(args[1]);
- int work = Integer.parseInt(args[2]);
-
- System.out.println("<array size> " + as + "\n"
- + "<OOM's> " + cnt + "\n"
- + "<work units> " + work + "\n");
-
- // Initialization
- TestBubbleUpRef b = new TestBubbleUpRef(as, cnt, work);
-
- // Run the test
- try {
- b.fill();
- } catch (OutOfMemoryError e) {
- b = null; // Free memory before trying to print anything
- System.err.println("Out of Memory - exiting ");
- } catch (Exception e) {
- System.err.println("Exiting ");
- }
- }
-}
-