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 sun.hotspot.code.CodeBlob;
  32 import jdk.test.lib.Asserts;
  33 
  34 /*
  35  * @test OverflowCodeCacheTest
  36  * @bug 8059550
  37  * @library /testlibrary /test/lib
  38  * @modules java.base/jdk.internal.misc
  39  * @modules java.management
  40  * @build OverflowCodeCacheTest
  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 OverflowCodeCacheTest
  46  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  47  *                   -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::*
  48  *                   -XX:+SegmentedCodeCache OverflowCodeCacheTest
  49  * @summary testing of code cache segments overflow
  50  */
  51 public class OverflowCodeCacheTest {
  52     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  53 
  54     public static void main(String[] args) {
  55         EnumSet<BlobType> blobTypes = BlobType.getAvailable();
  56         for (BlobType type : blobTypes) {
  57             new OverflowCodeCacheTest(type).test();
  58         }
  59     }
  60 
  61     private final BlobType type;
  62     private final MemoryPoolMXBean bean;
  63     private OverflowCodeCacheTest(BlobType type) {
  64         this.type = type;
  65         this.bean = type.getMemoryPool();
  66     }
  67 
  68     private void test() {
  69         System.out.printf("type %s%n", type);
  70         System.out.println("allocating till possible...");
  71         ArrayList<Long> blobs = new ArrayList<>();
  72         try {
  73             long addr;
  74             int size = (int) (getHeapSize() >> 7);
  75             while ((addr = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) {
  76                 blobs.add(addr);
  77 
  78                 BlobType actualType = CodeBlob.getCodeBlob(addr).code_blob_type;
  79                 if (actualType != type) {
  80                     // check we got allowed overflow handling
  81                     Asserts.assertTrue(type.allowTypeWhenOverflow(actualType),
  82                             type + " doesn't allow using " + actualType + " when overflow");
  83                 }
  84             }
  85             Asserts.assertNotEquals(WHITE_BOX.getCompilationActivityMode(), 1 /* run_compilation*/,
  86                     "Compilation must be disabled when CodeCache(CodeHeap) overflows");
  87         } finally {
  88             for (Long blob : blobs) {
  89                 WHITE_BOX.freeCodeBlob(blob);
  90             }
  91         }
  92     }
  93 
  94     private long getHeapSize() {
  95         return bean.getUsage().getMax();
  96     }
  97 
  98 }