1 /*
   2  * Copyright (c) 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  * @test
  26  * @bug 8072016
  27  * @summary Infinite deoptimization/recompilation cycles in case of arraycopy with tightly coupled allocation
  28  * @library /testlibrary /../../test/lib /compiler/whitebox
  29  * @build TestArrayCopyNoInitDeopt
  30  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  31  * @run main ClassFileInstaller com.oracle.java.testlibrary.Platform
  32  * @run main/othervm -Xmixed -XX:Tier4InvocationThreshold=5000 -XX:Tier3InvokeNotifyFreqLog=10
  33  *                    -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
  34  *                   -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:TypeProfileLevel=020
  35  *                   TestArrayCopyNoInitDeopt
  36  *
  37  */
  38 
  39 
  40 import sun.hotspot.WhiteBox;
  41 import sun.hotspot.code.NMethod;
  42 import com.oracle.java.testlibrary.Platform;
  43 import java.lang.reflect.*;
  44 
  45 public class TestArrayCopyNoInitDeopt {
  46 
  47     public static int[] m1(Object src) {
  48         if (src == null) return null;
  49         int[] dest = new int[10];
  50         try {
  51             System.arraycopy(src, 0, dest, 0, 10);
  52         } catch (ArrayStoreException npe) {
  53         }
  54         return dest;
  55     }
  56 
  57     static Object m2_src(Object src) {
  58         return src;
  59     }
  60 
  61     public static int[] m2(Object src) {
  62         if (src == null) return null;
  63         src = m2_src(src);
  64         int[] dest = new int[10];
  65         try {
  66             System.arraycopy(src, 0, dest, 0, 10);
  67         } catch (ArrayStoreException npe) {
  68         }
  69         return dest;
  70     }
  71 
  72     private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
  73 
  74     static boolean deoptimize(Method method, Object src_obj) throws Exception {
  75         for (int i = 0; i < 10; i++) {
  76             method.invoke(null, src_obj);
  77             if (!WHITE_BOX.isMethodCompiled(method)) {
  78                 return true;
  79             }
  80         }
  81         return false;
  82     }
  83 
  84     static public void main(String[] args) throws Exception {
  85         if (Platform.isServer()) {
  86             int[] src = new int[10];
  87             Object src_obj = new Object();
  88             Method method_m1 = TestArrayCopyNoInitDeopt.class.getMethod("m1", Object.class);
  89             Method method_m2 = TestArrayCopyNoInitDeopt.class.getMethod("m2", Object.class);
  90 
  91             // Warm up
  92             for (int i = 0; i < 20000; i++) {
  93                 m1(src);
  94             }
  95 
  96             // And make sure m1 is compiled by C2
  97             WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
  98 
  99             if (!WHITE_BOX.isMethodCompiled(method_m1)) {
 100                 throw new RuntimeException("m1 not compiled");
 101             }
 102 
 103             // should deoptimize for type check
 104             if (!deoptimize(method_m1, src_obj)) {
 105                 throw new RuntimeException("m1 not deoptimized");
 106             }
 107 
 108             WHITE_BOX.enqueueMethodForCompilation(method_m1, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
 109 
 110             if (!WHITE_BOX.isMethodCompiled(method_m1)) {
 111                 throw new RuntimeException("m1 not recompiled");
 112             }
 113 
 114             if (deoptimize(method_m1, src_obj)) {
 115                 throw new RuntimeException("m1 deoptimized again");
 116             }
 117 
 118             // Same test as above but with speculative types
 119 
 120             // Warm up & make sure we collect type profiling
 121             for (int i = 0; i < 20000; i++) {
 122                 m2(src);
 123             }
 124 
 125             // And make sure m2 is compiled by C2
 126             WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
 127 
 128             if (!WHITE_BOX.isMethodCompiled(method_m2)) {
 129                 throw new RuntimeException("m2 not compiled");
 130             }
 131 
 132             // should deoptimize for speculative type check
 133             if (!deoptimize(method_m2, src_obj)) {
 134                 throw new RuntimeException("m2 not deoptimized");
 135             }
 136 
 137             WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
 138 
 139             if (!WHITE_BOX.isMethodCompiled(method_m2)) {
 140                 throw new RuntimeException("m2 not recompiled");
 141             }
 142 
 143             // should deoptimize for actual type check
 144             if (!deoptimize(method_m2, src_obj)) {
 145                 throw new RuntimeException("m2 not deoptimized");
 146             }
 147 
 148             WHITE_BOX.enqueueMethodForCompilation(method_m2, CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION);
 149 
 150             if (!WHITE_BOX.isMethodCompiled(method_m2)) {
 151                 throw new RuntimeException("m2 not recompiled");
 152             }
 153 
 154             if (deoptimize(method_m2, src_obj)) {
 155                 throw new RuntimeException("m2 deoptimized again");
 156             }
 157         }
 158     }
 159 }