1 /*
   2  * Copyright (c) 2016, 2018, 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.nodes.aot;
  26 
  27 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
  28 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_16;
  29 
  30 import org.graalvm.compiler.core.common.PermanentBailoutException;
  31 import org.graalvm.compiler.graph.Node;
  32 import org.graalvm.compiler.graph.NodeClass;
  33 import org.graalvm.compiler.graph.spi.Canonicalizable;
  34 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  35 import org.graalvm.compiler.hotspot.HotSpotLIRGenerator;
  36 import org.graalvm.compiler.hotspot.meta.HotSpotConstantLoadAction;
  37 import org.graalvm.compiler.hotspot.nodes.DeoptimizingStubCall;
  38 import org.graalvm.compiler.hotspot.word.KlassPointer;
  39 import org.graalvm.compiler.lir.LIRFrameState;
  40 import org.graalvm.compiler.nodeinfo.NodeInfo;
  41 import org.graalvm.compiler.nodes.NodeView;
  42 import org.graalvm.compiler.nodes.ValueNode;
  43 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  44 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  45 import org.graalvm.compiler.nodes.util.GraphUtil;
  46 
  47 import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant;
  48 import jdk.vm.ci.hotspot.HotSpotObjectConstant;
  49 import jdk.vm.ci.meta.Constant;
  50 import jdk.vm.ci.meta.Value;
  51 
  52 /**
  53  * A call to the VM via a regular stub.
  54  */
  55 @NodeInfo(cycles = CYCLES_UNKNOWN, size = SIZE_16)
  56 public class ResolveConstantStubCall extends DeoptimizingStubCall implements Canonicalizable, LIRLowerable {
  57     public static final NodeClass<ResolveConstantStubCall> TYPE = NodeClass.create(ResolveConstantStubCall.class);
  58 
  59     @OptionalInput protected ValueNode value;
  60     @Input protected ValueNode string;
  61     protected Constant constant;
  62     protected HotSpotConstantLoadAction action;
  63 
  64     public ResolveConstantStubCall(ValueNode value, ValueNode string) {
  65         super(TYPE, value.stamp(NodeView.DEFAULT));
  66         this.value = value;
  67         this.string = string;
  68         this.action = HotSpotConstantLoadAction.RESOLVE;
  69     }
  70 
  71     public ResolveConstantStubCall(ValueNode value, ValueNode string, HotSpotConstantLoadAction action) {
  72         super(TYPE, value.stamp(NodeView.DEFAULT));
  73         this.value = value;
  74         this.string = string;
  75         this.action = action;
  76     }
  77 
  78     @NodeIntrinsic
  79     public static native Object resolveObject(Object value, Object symbol);
  80 
  81     @NodeIntrinsic
  82     public static native KlassPointer resolveKlass(KlassPointer value, Object symbol);
  83 
  84     @NodeIntrinsic
  85     public static native KlassPointer resolveKlass(KlassPointer value, Object symbol, @ConstantNodeParameter HotSpotConstantLoadAction action);
  86 
  87     @Override
  88     public Node canonical(CanonicalizerTool tool) {
  89         if (value != null) {
  90             constant = GraphUtil.foldIfConstantAndRemove(this, value);
  91         }
  92         return this;
  93     }
  94 
  95     @Override
  96     public void generate(NodeLIRBuilderTool gen) {
  97         assert constant != null : "Expected the value to fold: " + value;
  98         Value stringValue = gen.operand(string);
  99         Value result;
 100         LIRFrameState fs = gen.state(this);
 101         assert fs != null : "The stateAfter is null";
 102         if (constant instanceof HotSpotObjectConstant) {
 103             result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitObjectConstantRetrieval(constant, stringValue, fs);
 104         } else if (constant instanceof HotSpotMetaspaceConstant) {
 105             if (action == HotSpotConstantLoadAction.RESOLVE) {
 106                 result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitMetaspaceConstantRetrieval(constant, stringValue, fs);
 107             } else {
 108                 assert action == HotSpotConstantLoadAction.INITIALIZE;
 109                 result = ((HotSpotLIRGenerator) gen.getLIRGeneratorTool()).emitKlassInitializationAndRetrieval(constant, stringValue, fs);
 110             }
 111         } else {
 112             throw new PermanentBailoutException("Unsupported constant type: " + constant);
 113         }
 114         gen.setResult(this, result);
 115     }
 116 }