Mercurial > hg > graal-compiler
view test/gc/g1/TestEagerReclaimHumongousRegions2.java @ 22259:2241ccc653a0
ValuePhiNode should be an ArrayLengthProvider
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 20 Jul 2015 11:19:06 -0700 |
parents | 2d1534aa7131 |
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/* * Copyright (c) 2014, 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 TestEagerReclaimHumongousRegions2 * @bug 8051973 * @summary Test to make sure that eager reclaim of humongous objects correctly clears * mark bitmaps at reclaim. * @key gc * @library /testlibrary */ import java.util.ArrayList; import java.util.LinkedList; import java.util.Random; import com.oracle.java.testlibrary.OutputAnalyzer; import com.oracle.java.testlibrary.ProcessTools; // An object that has a few references to other instances to slow down marking. class ObjectWithSomeRefs { public ObjectWithSomeRefs other1; public ObjectWithSomeRefs other2; public ObjectWithSomeRefs other3; public ObjectWithSomeRefs other4; } class ReclaimRegionFast { public static final long MAX_MILLIS_FOR_RUN = 50 * 1000; // The maximum runtime for the actual test. public static final int M = 1024*1024; public static LinkedList<Object> garbageList = new LinkedList<Object>(); public static void genGarbage(Object large) { for (int i = 0; i < 64*1024; i++) { Object[] garbage = new Object[50]; garbage[0] = large; garbageList.add(garbage); } garbageList.clear(); } public static ArrayList<ObjectWithSomeRefs> longList = new ArrayList<ObjectWithSomeRefs>(); public static void main(String[] args) { for (int i = 0; i < 16*1024; i++) { longList.add(new ObjectWithSomeRefs()); } Random rnd = new Random(); for (int i = 0; i < longList.size(); i++) { int len = longList.size(); longList.get(i).other1 = longList.get(rnd.nextInt(len)); longList.get(i).other2 = longList.get(rnd.nextInt(len)); longList.get(i).other3 = longList.get(rnd.nextInt(len)); longList.get(i).other4 = longList.get(rnd.nextInt(len)); } int[] large1 = new int[M]; int[] large2 = null; int[] large3 = null; int[] large4 = null; Object ref_from_stack = large1; long start_millis = System.currentTimeMillis(); for (int i = 0; i < 20; i++) { long current_millis = System.currentTimeMillis(); if ((current_millis - start_millis) > MAX_MILLIS_FOR_RUN) { System.out.println("Finishing test because maximum runtime exceeded"); break; } // A set of large objects that will be reclaimed eagerly - and hopefully marked. large1 = new int[M - 20]; large2 = new int[M - 20]; large3 = new int[M - 20]; large4 = new int[M - 20]; genGarbage(large1); // Make sure that the compiler cannot completely remove // the allocation of the large object until here. System.out.println(large1 + " " + large2 + " " + large3 + " " + large4); } // Keep the reference to the first object alive. System.out.println(ref_from_stack); } } public class TestEagerReclaimHumongousRegions2 { public static void main(String[] args) throws Exception { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( "-XX:+UseG1GC", "-Xms128M", "-Xmx128M", "-Xmn2M", "-XX:G1HeapRegionSize=1M", "-XX:InitiatingHeapOccupancyPercent=0", // Want to have as much as possible initial marks. "-XX:+PrintGC", "-XX:+VerifyAfterGC", "-XX:ConcGCThreads=1", // Want to make marking as slow as possible. "-XX:+IgnoreUnrecognizedVMOptions", // G1VerifyBitmaps is develop only. "-XX:+G1VerifyBitmaps", ReclaimRegionFast.class.getName()); OutputAnalyzer output = new OutputAnalyzer(pb.start()); output.shouldHaveExitValue(0); } }