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annotate visualizer/Graph/src/com/sun/hotspot/igv/graph/PredecessorSelector.java @ 12690:c3bdd186e6cf

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fix possible NPE in TruffleCompiler with TraceTruffleCompilation and background compilation enabled. With background compilation, the installed code can already be invalidated when compiledMethod.getCode() is called, in which case it returns null.
author Andreas Woess <andreas.woess@jku.at>
date Wed, 06 Nov 2013 13:31:28 +0100
parents 015fb895586b
children
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1 /*
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2 * Copyright (c) 2008, 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 */
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24 package com.sun.hotspot.igv.graph;
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25
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26 import java.util.ArrayList;
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27 import java.util.List;
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28
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29 /**
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30 *
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31 * @author Thomas Wuerthinger
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32 */
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33 public class PredecessorSelector implements Selector {
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34
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35 private Selector innerSelector;
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36
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37 public PredecessorSelector(Selector innerSelector) {
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38 this.innerSelector = innerSelector;
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39 }
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40
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41 @Override
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42 public List<Figure> selected(Diagram d) {
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43 List<Figure> inner = innerSelector.selected(d);
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44 List<Figure> result = new ArrayList<>();
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45 for (Figure f : d.getFigures()) {
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46 boolean saved = false;
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47 for (Figure f2 : f.getSuccessors()) {
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48 if (inner.contains(f2)) {
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49 saved = true;
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50 }
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51 }
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52
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53 if (saved) {
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54 result.add(f);
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55 }
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56 }
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57
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58 return result;
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59 }
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60 }