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