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view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/access/SLWritePropertyCacheNode.java @ 21116:bf8cbbfabdcf
Use snippets for incrementing snippet counters
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Fri, 24 Apr 2015 12:05:38 -0700 |
parents | f7bc60c3a8f6 |
children | b1530a6cce8c |
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/* * Copyright (c) 2013, 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.truffle.sl.nodes.access; import com.oracle.truffle.api.*; import com.oracle.truffle.api.CompilerDirectives.*; import com.oracle.truffle.api.dsl.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.object.*; public abstract class SLWritePropertyCacheNode extends Node { protected final String propertyName; public SLWritePropertyCacheNode(String propertyName) { this.propertyName = propertyName; } public abstract void executeObject(DynamicObject receiver, Object value); @Specialization(guards = "location.isValid(receiver, value)", assumptions = "location.getAssumptions()") public void writeCached(DynamicObject receiver, Object value, // @Cached("createCachedWrite(receiver, value)") CachedWriteLocation location) { if (location.writeUnchecked(receiver, value)) { // write successful } else { executeObject(receiver, value); } } @Specialization(contains = "writeCached") @TruffleBoundary public void writeGeneric(DynamicObject receiver, Object value, // @Cached("new(createCachedWrite(receiver, value))") LRUCachedWriteLocation lru) { CachedWriteLocation location = lru.location; if (!location.isValid(receiver, value) || !location.areAssumptionsValid()) { location = createCachedWrite(receiver, value); lru.location = location; } if (location.writeUnchecked(receiver, value)) { // write successful } else { executeObject(receiver, value); } } protected CachedWriteLocation createCachedWrite(DynamicObject receiver, Object value) { while (receiver.updateShape()) { // multiple shape updates might be needed. } Shape oldShape = receiver.getShape(); Shape newShape; Property property = oldShape.getProperty(propertyName); if (property != null && property.getLocation().canSet(receiver, value)) { newShape = oldShape; } else { receiver.define(propertyName, value, 0); newShape = receiver.getShape(); property = newShape.getProperty(propertyName); } if (!oldShape.check(receiver)) { return createCachedWrite(receiver, value); } return new CachedWriteLocation(oldShape, newShape, property.getLocation()); } protected static final class CachedWriteLocation { private final Shape oldShape; private final Shape newShape; private final Location location; private final Assumption validLocation = Truffle.getRuntime().createAssumption(); public CachedWriteLocation(Shape oldShape, Shape newShape, Location location) { this.oldShape = oldShape; this.newShape = newShape; this.location = location; } public boolean areAssumptionsValid() { return validLocation.isValid() && oldShape.getValidAssumption().isValid() && newShape.getValidAssumption().isValid(); } public Assumption[] getAssumptions() { return new Assumption[]{oldShape.getValidAssumption(), newShape.getValidAssumption(), validLocation}; } public boolean isValid(DynamicObject receiver, Object value) { return oldShape.check(receiver) && location.canSet(receiver, value); } public boolean writeUnchecked(DynamicObject receiver, Object value) { try { if (oldShape == newShape) { location.set(receiver, value, oldShape); } else { location.set(receiver, value, oldShape, newShape); } return true; } catch (IncompatibleLocationException | FinalLocationException e) { validLocation.invalidate(); return false; } } } protected static final class LRUCachedWriteLocation { private CachedWriteLocation location; public LRUCachedWriteLocation(CachedWriteLocation location) { this.location = location; } } }