1 /*
   2  * Copyright (c) 2013, 2019, 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 package org.graalvm.compiler.replacements;
  26 
  27 import java.lang.reflect.Array;
  28 
  29 import org.graalvm.compiler.api.replacements.ClassSubstitution;
  30 import org.graalvm.compiler.api.replacements.MethodSubstitution;
  31 import org.graalvm.compiler.nodes.DeoptimizeNode;
  32 import org.graalvm.compiler.nodes.extended.BranchProbabilityNode;
  33 import org.graalvm.compiler.nodes.java.ArrayLengthNode;
  34 
  35 import jdk.vm.ci.meta.DeoptimizationAction;
  36 import jdk.vm.ci.meta.DeoptimizationReason;
  37 
  38 // JaCoCo Exclude
  39 
  40 /**
  41  * Substitutions for {@link java.lang.reflect.Array} methods.
  42  */
  43 @ClassSubstitution(Array.class)
  44 public class ArraySubstitutions {
  45 
  46     @MethodSubstitution
  47     public static int getLength(Object array) {
  48         if (BranchProbabilityNode.probability(BranchProbabilityNode.DEOPT_PROBABILITY, !array.getClass().isArray())) {
  49             DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
  50         }
  51         return ArrayLengthNode.arrayLength(array);
  52     }
  53 
  54 }