1 /*

     2  * Copyright (c) 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.hotspot.meta;

    26 

    27 import static org.graalvm.compiler.bytecode.Bytecodes.GETSTATIC;

    28 import static org.graalvm.compiler.bytecode.Bytecodes.INVOKESTATIC;

    29 import static org.graalvm.compiler.bytecode.Bytecodes.NEW;

    30 import static org.graalvm.compiler.bytecode.Bytecodes.PUTSTATIC;

    31 

    32 import java.util.function.Supplier;

    33 

    34 import org.graalvm.compiler.hotspot.nodes.KlassBeingInitializedCheckNode;

    35 import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp;

    36 import org.graalvm.compiler.nodes.ConstantNode;

    37 import org.graalvm.compiler.nodes.FrameState;

    38 import org.graalvm.compiler.nodes.ValueNode;

    39 import org.graalvm.compiler.nodes.graphbuilderconf.ClassInitializationPlugin;

    40 import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;

    41 

    42 import jdk.vm.ci.hotspot.HotSpotResolvedObjectType;

    43 import jdk.vm.ci.meta.ConstantPool;

    44 import jdk.vm.ci.meta.ResolvedJavaType;

    45 

    46 public final class HotSpotJITClassInitializationPlugin implements ClassInitializationPlugin {

    47     @Override

    48     public boolean apply(GraphBuilderContext builder, ResolvedJavaType type, Supplier<FrameState> frameState, ValueNode[] classInit) {

    49         if (!type.isInitialized() && (type.isInstanceClass() || type.isInterface())) {

    50             int code = builder.getCode().getCode()[builder.bci()] & 0xff;

    51             switch (code) {

    52                 case INVOKESTATIC:

    53                 case GETSTATIC:

    54                 case PUTSTATIC:

    55                 case NEW:

    56                     ValueNode typeConstant = ConstantNode.forConstant(KlassPointerStamp.klass(), ((HotSpotResolvedObjectType) type).klass(), builder.getMetaAccess());

    57                     builder.add(new KlassBeingInitializedCheckNode(typeConstant));

    58                     return true;

    59                 default:

    60 

    61             }

    62         }

    63         return false;

    64     }

    65 

    66     @Override

    67     public boolean supportsLazyInitialization(ConstantPool cp) {

    68         return false;

    69     }

    70 

    71     @Override

    72     public void loadReferencedType(GraphBuilderContext builder, ConstantPool cp, int cpi, int opcode) {

    73         cp.loadReferencedType(cpi, opcode);

    74     }

    75 

    76 }