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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/phases/AheadOfTimeVerifcationPhase.java @ 10074:e8fbc5fd3440

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aot: add/fix some javadoc
author Bernhard Urban <bernhard.urban@jku.at>
date Mon, 17 Jun 2013 17:50:09 +0200
parents 56fc40ca4ae0
children
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.phases;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.nodes.*;
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27 import com.oracle.graal.phases.*;
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28
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29 /**
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30 * Checking for embedded oops in the graph. (Interned) Strings are an exception as they live in CDS
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31 * space.
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32 *
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33 * @see LoadJavaMirrorWithKlassPhase
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34 */
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35 public class AheadOfTimeVerifcationPhase extends VerifyPhase {
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36
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37 @Override
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38 protected boolean verify(StructuredGraph graph) {
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39 for (ConstantNode node : graph.getNodes().filter(ConstantNode.class)) {
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40 assert !isOop(node) || isNullReference(node) || isString(node) : "embedded oop: " + node;
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41 }
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42 return true;
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43 }
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44
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45 private static boolean isOop(ConstantNode node) {
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46 return node.kind() == Kind.Object;
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47 }
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48
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49 private static boolean isNullReference(ConstantNode node) {
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50 return isOop(node) && node.asConstant().asObject() == null;
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51 }
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52
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53 private static boolean isString(ConstantNode node) {
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54 return isOop(node) && node.asConstant().asObject() instanceof String;
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55 }
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56 }