1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 import java.lang.management.MemoryPoolMXBean;
  26 import java.util.EnumSet;
  27 import java.util.ArrayList;
  28 
  29 import jdk.testlib.WhiteBox;
  30 import jdk.testlib.code.BlobType;
  31 import com.oracle.java.testlibrary.Asserts;
  32 import com.oracle.java.testlibrary.InfiniteLoop;
  33 
  34 /*
  35  * @test AllocationCodeBlobTest
  36  * @bug 8059624 8064669
  37  * @library /testlibrary /../../test/lib
  38  * @build AllocationCodeBlobTest
  39  * @run main ClassFileInstaller jdk.testlib.WhiteBox
  40  *                              jdk.testlib.WhiteBox$WhiteBoxPermission
  41  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  42  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  43  *                   -XX:-SegmentedCodeCache AllocationCodeBlobTest
  44  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  45  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  46  *                   -XX:+SegmentedCodeCache AllocationCodeBlobTest
  47  * @summary testing of WB::allocate/freeCodeBlob()
  48  */
  49 public class AllocationCodeBlobTest {
  50     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  51     private static final long CODE_CACHE_SIZE
  52             = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize");
  53     private static final int SIZE = 1;
  54 
  55     public static void main(String[] args) {
  56         // check that Sweeper handels dummy blobs correctly
  57         Thread t = new Thread(
  58                 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L),
  59                 "ForcedSweeper");
  60         t.setDaemon(true);
  61         System.out.println("Starting " + t.getName());
  62         t.start();
  63 
  64         EnumSet<BlobType> blobTypes = BlobType.getAvailable();
  65         for (BlobType type : blobTypes) {
  66             new AllocationCodeBlobTest(type).test();
  67         }
  68 
  69         // check that deoptimization works well w/ dummy blobs
  70         t = new Thread(
  71                 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L),
  72                 "Deoptimize Thread");
  73         t.setDaemon(true);
  74         System.out.println("Starting " + t.getName());
  75         t.start();
  76 
  77         for (int i = 0; i < 10_000; ++i) {
  78             for (BlobType type : blobTypes) {
  79                 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
  80             }
  81         }
  82 
  83     }
  84 
  85     private final BlobType type;
  86     private final MemoryPoolMXBean bean;
  87     private AllocationCodeBlobTest(BlobType type) {
  88         this.type = type;
  89         bean = type.getMemoryPool();
  90     }
  91 
  92     private void test() {
  93         System.out.printf("type %s%n", type);
  94         long start = getUsage();
  95         long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
  96         Asserts.assertNE(0, addr, "allocation failed");
  97 
  98         long firstAllocation = getUsage();
  99         Asserts.assertLTE(start + SIZE, firstAllocation,
 100                 "allocation should increase memory usage: "
 101                 + start + " + " + SIZE + " <= " + firstAllocation);
 102 
 103         WHITE_BOX.freeCodeBlob(addr);
 104         long firstFree = getUsage();
 105         Asserts.assertLTE(firstFree, firstAllocation,
 106                 "free shouldn't increase memory usage: "
 107                 + firstFree + " <= " + firstAllocation);
 108 
 109         addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
 110         Asserts.assertNE(0, addr, "allocation failed");
 111 
 112         long secondAllocation = getUsage();
 113         Asserts.assertEQ(firstAllocation, secondAllocation);
 114 
 115         WHITE_BOX.freeCodeBlob(addr);
 116         System.out.println("allocating till possible...");
 117         ArrayList<Long> blobs = new ArrayList<>();
 118         int size = (int) (CODE_CACHE_SIZE >> 7);
 119         while ((addr = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) {
 120             blobs.add(addr);
 121         }
 122         for (Long blob : blobs) {
 123             WHITE_BOX.freeCodeBlob(blob);
 124         }
 125     }
 126 
 127     private long getUsage() {
 128         return bean.getUsage().getUsed();
 129     }
 130 }