1 /*
   2  * Copyright (c) 2013, 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.phases;
  26 
  27 import org.graalvm.compiler.debug.DebugCloseable;
  28 import org.graalvm.compiler.graph.Node;
  29 import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig;
  30 import org.graalvm.compiler.hotspot.gc.g1.G1BarrierSet;
  31 import org.graalvm.compiler.hotspot.gc.shared.BarrierSet;
  32 import org.graalvm.compiler.hotspot.gc.shared.CardTableBarrierSet;
  33 import org.graalvm.compiler.nodes.StructuredGraph;
  34 import org.graalvm.compiler.nodes.extended.ArrayRangeWrite;
  35 import org.graalvm.compiler.nodes.java.AbstractCompareAndSwapNode;
  36 import org.graalvm.compiler.nodes.java.LoweredAtomicReadAndWriteNode;
  37 import org.graalvm.compiler.nodes.memory.ReadNode;
  38 import org.graalvm.compiler.nodes.memory.WriteNode;
  39 import org.graalvm.compiler.phases.Phase;
  40 
  41 public class WriteBarrierAdditionPhase extends Phase {
  42 
  43     private BarrierSet barrierSet;
  44 
  45     public WriteBarrierAdditionPhase(GraalHotSpotVMConfig config) {
  46         this.barrierSet = createBarrierSet(config);
  47     }
  48 
  49     @SuppressWarnings("try")
  50     @Override
  51     protected void run(StructuredGraph graph) {
  52         for (Node n : graph.getNodes()) {
  53             try (DebugCloseable scope = n.graph().withNodeSourcePosition(n)) {
  54                 if (n instanceof ReadNode) {
  55                     barrierSet.addReadNodeBarriers((ReadNode) n, graph);
  56                 } else if (n instanceof WriteNode) {
  57                     barrierSet.addWriteNodeBarriers((WriteNode) n, graph);
  58                 } else if (n instanceof LoweredAtomicReadAndWriteNode) {
  59                     LoweredAtomicReadAndWriteNode loweredAtomicReadAndWriteNode = (LoweredAtomicReadAndWriteNode) n;
  60                     barrierSet.addAtomicReadWriteNodeBarriers(loweredAtomicReadAndWriteNode, graph);
  61                 } else if (n instanceof AbstractCompareAndSwapNode) {
  62                     barrierSet.addCASBarriers((AbstractCompareAndSwapNode) n, graph);
  63                 } else if (n instanceof ArrayRangeWrite) {
  64                     ArrayRangeWrite node = (ArrayRangeWrite) n;
  65                     if (node.writesObjectArray()) {
  66                         barrierSet.addArrayRangeBarriers(node, graph);
  67                     }
  68                 }
  69             }
  70         }
  71     }
  72 
  73     @Override
  74     public boolean checkContract() {
  75         return false;
  76     }
  77 
  78     private BarrierSet createBarrierSet(GraalHotSpotVMConfig config) {
  79         if (config.useG1GC) {
  80             return createG1BarrierSet();
  81         } else {
  82             return createCardTableBarrierSet();
  83         }
  84     }
  85 
  86     protected BarrierSet createCardTableBarrierSet() {
  87         return new CardTableBarrierSet();
  88     }
  89 
  90     protected BarrierSet createG1BarrierSet() {
  91         return new G1BarrierSet();
  92     }
  93 }