Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/vmSymbols.java @ 17587:561045d22599 jdk8u11-b07
Added tag jdk8u11-b06 for changeset b73ee2b9027c
author | katleman |
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date | Tue, 29 Apr 2014 12:51:45 -0700 |
parents | cb315dc80374 |
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1 /* |
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2 * Copyright (c) 2011, 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 |
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25 package sun.jvm.hotspot.runtime; |
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26 |
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27 import java.io.*; |
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28 import java.util.*; |
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29 import sun.jvm.hotspot.debugger.*; |
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30 import sun.jvm.hotspot.memory.*; |
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31 import sun.jvm.hotspot.oops.*; |
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32 import sun.jvm.hotspot.runtime.*; |
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33 import sun.jvm.hotspot.types.*; |
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34 import sun.jvm.hotspot.utilities.*; |
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35 |
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36 |
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37 public class vmSymbols { |
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38 static { |
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39 VM.registerVMInitializedObserver(new Observer() { |
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40 public void update(Observable o, Object data) { |
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41 initialize(VM.getVM().getTypeDataBase()); |
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42 } |
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43 }); |
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44 } |
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45 |
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46 private static Address symbolsAddress; |
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47 private static int FIRST_SID; |
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48 private static int SID_LIMIT; |
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49 |
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50 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { |
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51 Type type = db.lookupType("vmSymbols"); |
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52 symbolsAddress = type.getAddressField("_symbols[0]").getStaticFieldAddress(); |
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53 FIRST_SID = db.lookupIntConstant("vmSymbols::FIRST_SID"); |
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54 SID_LIMIT = db.lookupIntConstant("vmSymbols::SID_LIMIT"); |
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55 } |
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56 |
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57 public static Symbol symbolAt(int id) { |
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58 if (id < FIRST_SID || id >= SID_LIMIT) throw new IndexOutOfBoundsException("bad SID " + id); |
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59 return Symbol.create(symbolsAddress.getAddressAt(id * VM.getVM().getAddressSize())); |
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60 } |
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61 } |