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