Mercurial > hg > truffle
view graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/phases/GraphChangeMonitoringPhase.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 23:21:15 +0200 |
parents | fe76bf3867f3 |
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/* * 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 com.oracle.graal.compiler.phases; import java.util.*; import java.util.stream.*; import com.oracle.graal.graph.Graph.NodeEvent; import com.oracle.graal.graph.Graph.NodeEventScope; import com.oracle.graal.graph.Node; import com.oracle.graal.nodes.*; import com.oracle.graal.phases.*; import com.oracle.graal.phases.common.util.*; import com.oracle.graal.phases.tiers.*; import com.oracle.jvmci.debug.*; import com.oracle.jvmci.debug.Debug.Scope; /** * A utility phase for detecting when a phase would change the graph and reporting extra information * about the effects. The phase is first run on a copy of the graph and if a change in that graph is * detected then it's rerun on the original graph inside a new debug scope under * GraphChangeMonitoringPhase. The message argument can be used to distinguish between the same * phase run at different points. * * @param <C> */ public class GraphChangeMonitoringPhase<C extends PhaseContext> extends PhaseSuite<C> { private final String message; public GraphChangeMonitoringPhase(String message, BasePhase<C> phase) { super(); this.message = message; appendPhase(phase); } public GraphChangeMonitoringPhase(String message) { super(); this.message = message; } @Override protected void run(StructuredGraph graph, C context) { /* * Phase may add nodes but not end up using them so ignore additions. Nodes going dead and * having their inputs change are the main interesting differences. */ HashSetNodeEventListener listener = new HashSetNodeEventListener().exclude(NodeEvent.NODE_ADDED); StructuredGraph graphCopy = (StructuredGraph) graph.copy(); try (NodeEventScope s = graphCopy.trackNodeEvents(listener)) { try (Scope s2 = Debug.sandbox("WithoutMonitoring", null)) { super.run(graphCopy, context); } catch (Throwable t) { Debug.handle(t); } } /* * Ignore LogicConstantNode since those are sometimes created and deleted as part of running * a phase. */ if (listener.getNodes().stream().filter(e -> !(e instanceof LogicConstantNode)).findFirst().get() != null) { /* rerun it on the real graph in a new Debug scope so Dump and Log can find it. */ listener = new HashSetNodeEventListener(); try (NodeEventScope s = graph.trackNodeEvents(listener)) { try (Scope s2 = Debug.scope("WithGraphChangeMonitoring." + getName() + "-" + message)) { if (Debug.isDumpEnabled(BasePhase.PHASE_DUMP_LEVEL)) { Debug.dump(BasePhase.PHASE_DUMP_LEVEL, graph, "*** Before phase %s", getName()); } super.run(graph, context); Set<Node> collect = listener.getNodes().stream().filter(e -> !e.isAlive()).filter(e -> !(e instanceof LogicConstantNode)).collect(Collectors.toSet()); if (Debug.isDumpEnabled(BasePhase.PHASE_DUMP_LEVEL)) { Debug.dump(BasePhase.PHASE_DUMP_LEVEL, graph, "*** After phase %s %s", getName(), collect); } Debug.log("*** %s %s %s\n", message, graph, collect); } } } else { // Go ahead and run it normally even though it should have no effect super.run(graph, context); } } }