1 /*
   2  * Copyright (c) 2014, 2015, 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 sun.hotspot.WhiteBox;
  30 import sun.hotspot.code.BlobType;
  31 import jdk.test.lib.Asserts;
  32 import jdk.test.lib.InfiniteLoop;
  33 
  34 /*
  35  * @test AllocationCodeBlobTest
  36  * @bug 8059624 8064669
  37  * @library /testlibrary /test/lib
  38  * @modules java.base/jdk.internal.misc
  39  * @modules java.management
  40  * @build AllocationCodeBlobTest
  41  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  42  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  43  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  44  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  45  *                   -XX:-SegmentedCodeCache AllocationCodeBlobTest
  46  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  47  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  48  *                   -XX:+SegmentedCodeCache AllocationCodeBlobTest
  49  * @summary testing of WB::allocate/freeCodeBlob()
  50  */
  51 public class AllocationCodeBlobTest {
  52     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  53     private static final long CODE_CACHE_SIZE
  54             = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize");
  55     private static final int SIZE = 1;
  56 
  57     public static void main(String[] args) {
  58         // check that Sweeper handels dummy blobs correctly
  59         Thread t = new Thread(
  60                 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L),
  61                 "ForcedSweeper");
  62         t.setDaemon(true);
  63         System.out.println("Starting " + t.getName());
  64         t.start();
  65 
  66         EnumSet<BlobType> blobTypes = BlobType.getAvailable();
  67         for (BlobType type : blobTypes) {
  68             new AllocationCodeBlobTest(type).test();
  69         }
  70 
  71         // check that deoptimization works well w/ dummy blobs
  72         t = new Thread(
  73                 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L),
  74                 "Deoptimize Thread");
  75         t.setDaemon(true);
  76         System.out.println("Starting " + t.getName());
  77         t.start();
  78 
  79         for (int i = 0; i < 10_000; ++i) {
  80             for (BlobType type : blobTypes) {
  81                 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
  82             }
  83         }
  84 
  85     }
  86 
  87     private final BlobType type;
  88     private final MemoryPoolMXBean bean;
  89     private AllocationCodeBlobTest(BlobType type) {
  90         this.type = type;
  91         bean = type.getMemoryPool();
  92     }
  93 
  94     private void test() {
  95         System.out.printf("type %s%n", type);
  96 
  97         // Measure the code cache usage after allocate/free.
  98         long start = getUsage();
  99         long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
 100         long firstAllocation = getUsage();
 101         WHITE_BOX.freeCodeBlob(addr1);
 102         long firstFree = getUsage();
 103         long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id);
 104         long secondAllocation = getUsage();
 105         WHITE_BOX.freeCodeBlob(addr2);
 106 
 107         // The following code may trigger resolving of invokedynamic
 108         // instructions and therefore method handle intrinsic creation
 109         // in the code cache. Make sure this is executed after measuring
 110         // the code cache usage.
 111         Asserts.assertNE(0, addr1, "first allocation failed");
 112         Asserts.assertNE(0, addr2, "second allocation failed");
 113         Asserts.assertLTE(start + SIZE, firstAllocation,
 114                 "allocation should increase memory usage: "
 115                 + start + " + " + SIZE + " <= " + firstAllocation);
 116         Asserts.assertLTE(firstFree, firstAllocation,
 117                 "free shouldn't increase memory usage: "
 118                 + firstFree + " <= " + firstAllocation);
 119         Asserts.assertEQ(firstAllocation, secondAllocation);
 120 
 121         System.out.println("allocating till possible...");
 122         ArrayList<Long> blobs = new ArrayList<>();
 123         int size = (int) (CODE_CACHE_SIZE >> 7);
 124         while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) {
 125             blobs.add(addr1);
 126         }
 127         for (Long blob : blobs) {
 128             WHITE_BOX.freeCodeBlob(blob);
 129         }
 130     }
 131 
 132     private long getUsage() {
 133         return bean.getUsage().getUsed();
 134     }
 135 }