| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.phases.common.instrumentation; |
| |
| import java.util.HashMap; |
| |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeFlood; |
| import org.graalvm.compiler.nodes.AbstractEndNode; |
| import org.graalvm.compiler.nodes.FixedNode; |
| import org.graalvm.compiler.nodes.FixedWithNextNode; |
| import org.graalvm.compiler.nodes.LoopEndNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.debug.instrumentation.InstrumentationNode; |
| import org.graalvm.compiler.nodes.debug.instrumentation.MonitorProxyNode; |
| import org.graalvm.compiler.nodes.java.MonitorIdNode; |
| import org.graalvm.compiler.nodes.virtual.AllocatedObjectNode; |
| import org.graalvm.compiler.nodes.virtual.CommitAllocationNode; |
| import org.graalvm.compiler.nodes.virtual.VirtualObjectNode; |
| import org.graalvm.compiler.phases.Phase; |
| |
| /** |
| * The {@code HighTierReconcileInstrumentationPhase} reconciles the InstrumentationNodes according |
| * to the optimizations at the high tier, e.g., the partial escape analysis. It clones the |
| * InstrumentationNode and inserts at the CommitAllocationNode that includes the allocation/lock |
| * targeted by the InstrumentationNode. |
| */ |
| public class HighTierReconcileInstrumentationPhase extends Phase { |
| |
| @Override |
| public boolean checkContract() { |
| return false; |
| } |
| |
| @Override |
| protected void run(StructuredGraph graph) { |
| // iterate through all CommitAllocationNodes, and clone the InstrumentationNodes targeting |
| // allocation/lock held by this CommitAllocationNode |
| for (CommitAllocationNode commit : graph.getNodes().filter(CommitAllocationNode.class)) { |
| InstrumentationAggregation aggr = new InstrumentationAggregation(graph, commit); |
| // iterate through all VirtualObjectNodes held by the CommitAllocationNode, clone if any |
| // InstrumentationNode targets one of these VirtualObjectNodes |
| for (int objIndex = 0; objIndex < commit.getVirtualObjects().size(); objIndex++) { |
| VirtualObjectNode virtual = commit.getVirtualObjects().get(objIndex); |
| for (InstrumentationNode instrumentationNode : graph.getNodes().filter(InstrumentationNode.class)) { |
| if (isCFGAccessible(instrumentationNode, commit) && instrumentationNode.getTarget() == virtual) { |
| // clone InstrumentationNode when the CommitAllocationNode is accessible |
| // from the InstrumentationNode, and the InstrumentationNode's target |
| // matches the given VirtualObjectNode |
| aggr.insertClone(instrumentationNode, getAllocatedObject(graph, commit, virtual)); |
| } |
| } |
| } |
| // iterate through all MonitorIdNodes held by the CommitAllocationNode, clone if any |
| // InstrumentationNode targets one of these MonitorIdNodes (via MonitorProxyNode) |
| for (int objIndex = 0; objIndex < commit.getVirtualObjects().size(); objIndex++) { |
| VirtualObjectNode virtual = commit.getVirtualObjects().get(objIndex); |
| for (MonitorIdNode monitorId : commit.getLocks(objIndex)) { |
| for (InstrumentationNode instrumentationNode : graph.getNodes().filter(InstrumentationNode.class)) { |
| if (isCFGAccessible(instrumentationNode, commit) && instrumentationNode.getTarget() instanceof MonitorProxyNode && |
| ((MonitorProxyNode) instrumentationNode.getTarget()).getMonitorId() == monitorId) { |
| // clone InstrumentationNode when the CommitAllocationNode is accessible |
| // from the InstrumentationNode, and the InstrumentationNode's target is |
| // a MonitorProxyNode that matches the MonitorIdNode |
| aggr.insertClone(instrumentationNode, graph.addWithoutUnique(new MonitorProxyNode(getAllocatedObject(graph, commit, virtual), monitorId))); |
| } |
| } |
| } |
| } |
| } |
| // remove InstrumentationNodes that still target virtual nodes |
| for (InstrumentationNode instrumentationNode : graph.getNodes().filter(InstrumentationNode.class)) { |
| ValueNode target = instrumentationNode.getTarget(); |
| if (target instanceof VirtualObjectNode) { |
| graph.removeFixed(instrumentationNode); |
| } else if (target instanceof MonitorProxyNode) { |
| MonitorProxyNode proxy = (MonitorProxyNode) target; |
| if (proxy.object() == null) { |
| graph.removeFixed(instrumentationNode); |
| } |
| } |
| } |
| } |
| |
| /** |
| * The {@code InstrumentationAggregation} maintains an inserting location after |
| * CommitAllocationNode such that the cloned InstrumentationNodes would appear in the order of |
| * the allocations. |
| */ |
| class InstrumentationAggregation { |
| |
| private StructuredGraph graph; |
| private CommitAllocationNode commit; |
| private FixedWithNextNode insertAfter; |
| |
| InstrumentationAggregation(StructuredGraph graph, CommitAllocationNode commit) { |
| this.graph = graph; |
| this.commit = commit; |
| this.insertAfter = commit; |
| } |
| |
| void insertClone(InstrumentationNode instrumentationNode, ValueNode newTarget) { |
| InstrumentationNode clone = (InstrumentationNode) instrumentationNode.copyWithInputs(); |
| // update the clone instrumentation node with the new target |
| clone.replaceFirstInput(clone.getTarget(), newTarget); |
| // update weak dependencies of the clone instrumentation node where the dependency |
| // is also a VirtualObjectNode. This is common when one allocation in the |
| // CommitAllocationNode depends on another allocation. |
| for (ValueNode input : clone.getWeakDependencies()) { |
| if ((input instanceof VirtualObjectNode) && (commit.getVirtualObjects().contains(input))) { |
| clone.replaceFirstInput(input, getAllocatedObject(graph, commit, (VirtualObjectNode) input)); |
| } |
| } |
| graph.addAfterFixed(insertAfter, clone); |
| insertAfter = clone; |
| } |
| |
| } |
| |
| private final HashMap<FixedWithNextNode, NodeFlood> cachedNodeFloods = new HashMap<>(); |
| |
| /** |
| * @return true if there is a control flow path between {@code from} and {@code to}. |
| */ |
| private boolean isCFGAccessible(FixedWithNextNode from, FixedNode to) { |
| NodeFlood flood = cachedNodeFloods.get(from); |
| if (flood == null) { |
| flood = from.graph().createNodeFlood(); |
| flood.add(from); |
| for (Node current : flood) { |
| if (current instanceof LoopEndNode) { |
| continue; |
| } else if (current instanceof AbstractEndNode) { |
| flood.add(((AbstractEndNode) current).merge()); |
| } else { |
| flood.addAll(current.successors()); |
| } |
| } |
| cachedNodeFloods.put(from, flood); |
| } |
| return flood.isMarked(to); |
| } |
| |
| /** |
| * Get/generate the AllocatedObjectNode for the given VirtualObjectNode in the given |
| * CommitAllocationNode. |
| */ |
| private static AllocatedObjectNode getAllocatedObject(StructuredGraph graph, CommitAllocationNode commit, VirtualObjectNode virtual) { |
| // search if the AllocatedObjectNode already exists |
| for (AllocatedObjectNode allocatedObject : graph.getNodes().filter(AllocatedObjectNode.class)) { |
| if (allocatedObject.getCommit() == commit && allocatedObject.getVirtualObject() == virtual) { |
| return allocatedObject; |
| } |
| } |
| // create one if the AllocatedObjectNode does not exist |
| AllocatedObjectNode allocatedObject = graph.addWithoutUnique(new AllocatedObjectNode(virtual)); |
| allocatedObject.setCommit(commit); |
| return allocatedObject; |
| } |
| |
| } |
