1 /*
   2  * Copyright (c) 2014, 2016, 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 /*
  26  * @test OverflowCodeCacheTest
  27  * @bug 8059550
  28  * @summary testing of code cache segments overflow
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  *
  33  * @build sun.hotspot.WhiteBox
  34  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  35  *                                sun.hotspot.WhiteBox$WhiteBoxPermission
  36  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  37  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  38  *                   -XX:-SegmentedCodeCache
  39  *                   compiler.codecache.OverflowCodeCacheTest
  40  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  41  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  42  *                   -XX:+SegmentedCodeCache
  43  *                   compiler.codecache.OverflowCodeCacheTest
  44  */
  45 
  46 package compiler.codecache;
  47 
  48 import jdk.test.lib.Asserts;
  49 import sun.hotspot.WhiteBox;
  50 import sun.hotspot.code.BlobType;
  51 import sun.hotspot.code.CodeBlob;
  52 
  53 import java.lang.management.MemoryPoolMXBean;
  54 import java.util.ArrayList;
  55 import java.util.EnumSet;
  56 
  57 public class OverflowCodeCacheTest {
  58     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  59 
  60     public static void main(String[] args) {
  61         EnumSet<BlobType> blobTypes = BlobType.getAvailable();
  62         for (BlobType type : blobTypes) {
  63             new OverflowCodeCacheTest(type).test();
  64         }
  65     }
  66 
  67     private final BlobType type;
  68     private final MemoryPoolMXBean bean;
  69     private OverflowCodeCacheTest(BlobType type) {
  70         this.type = type;
  71         this.bean = type.getMemoryPool();
  72     }
  73 
  74     private void test() {
  75         System.out.printf("type %s%n", type);
  76         System.out.println("allocating till possible...");
  77         ArrayList<Long> blobs = new ArrayList<>();
  78         int compilationActivityMode = -1;
  79         try {
  80             long addr;
  81             int size = (int) (getHeapSize() >> 7);
  82             while ((addr = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) {
  83                 blobs.add(addr);
  84 
  85                 BlobType actualType = CodeBlob.getCodeBlob(addr).code_blob_type;
  86                 if (actualType != type) {
  87                     // check we got allowed overflow handling
  88                     Asserts.assertTrue(type.allowTypeWhenOverflow(actualType),
  89                             type + " doesn't allow using " + actualType + " when overflow");
  90                 }
  91             }
  92             /* now, remember compilationActivityMode to check it later, after freeing, since we
  93                possibly have no free cache for futher work */
  94             compilationActivityMode = WHITE_BOX.getCompilationActivityMode();
  95         } finally {
  96             for (Long blob : blobs) {
  97                 WHITE_BOX.freeCodeBlob(blob);
  98             }
  99         }
 100         Asserts.assertNotEquals(compilationActivityMode, 1 /* run_compilation*/,
 101                 "Compilation must be disabled when CodeCache(CodeHeap) overflows");
 102     }
 103 
 104     private long getHeapSize() {
 105         return bean.getUsage().getMax();
 106     }
 107 
 108 }