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annotate src/share/vm/graal/graalVmIds.hpp @ 3632:136ea96eb7f8

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Remove the need for VmId (last usage was the constant pool).
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 14 Nov 2011 22:33:15 +0100
parents f00918f35c7f
children 076542d505cd
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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 #include "memory/allocation.hpp"
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25 #include "utilities/growableArray.hpp"
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26 #include "oops/oop.hpp"
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27 #include "runtime/handles.hpp"
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28 #include "runtime/thread.hpp"
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29 #include "classfile/javaClasses.hpp"
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30 #include "runtime/jniHandles.hpp"
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31
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32 class VmIds : public AllStatic {
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33
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34 private:
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35 static GrowableArray<address>* _stubs;
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36
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37 static oop getObject(jlong id);
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38
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39 public:
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40 // these constants needs to have the same values as the one in HotSpotProxy.java
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41 static const jlong STUB = 0x100000000000000LL; // address
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42 static const jlong METHOD = 0x200000000000000LL; // methodOop
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43 static const jlong CLASS = 0x300000000000000LL; // klassOop
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44 static const jlong CONSTANT_POOL = 0x500000000000000LL; // constantPoolOop
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45 static const jlong CONSTANT = 0x600000000000000LL; // oop
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46 static const jlong TYPE_MASK = 0xf00000000000000LL;
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47 static const jlong DUMMY_CONSTANT = 0x6ffffffffffffffLL;
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48
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49 // Initializes the VmIds for a compilation, by creating the arrays
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50 static void initializeObjects();
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51
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52 // Adds a stub address, and returns the corresponding vmId (which is of type STUB)
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53 static jlong addStub(address stub);
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54
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55 // Returns the stub address with the given vmId
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56 static address getStub(jlong id);
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58 // Returns the stub address with the given vmId taken from a java.lang.Long
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59 static address getStub(oop id);
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60
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61 // Helper function to convert a symbol to a java.lang.String object
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62 template <typename T> static T toString(Symbol* symbol, TRAPS);
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64 // Helper function to convert a java.lang.String object to a symbol (this will return NULL if the symbol doesn't exist in the system)
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65 static Symbol* toSymbol(jstring string);
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66
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67 // Helper function to get the contents of a java.lang.Long
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68 static jlong getBoxedLong(oop obj);
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69 };
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71 inline address VmIds::getStub(oop obj) {
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72 return getStub(getBoxedLong(obj));
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73 }
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74
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75 template <> inline Handle VmIds::toString<Handle>(Symbol* symbol, TRAPS) {
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76 return java_lang_String::create_from_symbol(symbol, THREAD);
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77 }
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78
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79 template <> inline oop VmIds::toString<oop>(Symbol* symbol, TRAPS) {
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80 return toString<Handle>(symbol, THREAD)();
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81 }
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82
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83 template <> inline jstring VmIds::toString<jstring>(Symbol* symbol, TRAPS) {
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84 return (jstring)JNIHandles::make_local(toString<oop>(symbol, THREAD));
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85 }
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86
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87 template <> inline jobject VmIds::toString<jobject>(Symbol* symbol, TRAPS) {
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88 return JNIHandles::make_local(toString<oop>(symbol, THREAD));
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89 }
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90
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91 inline Symbol* VmIds::toSymbol(jstring string) {
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92 return java_lang_String::as_symbol_or_null(JNIHandles::resolve(string));
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93 }
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94
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95 inline jlong VmIds::getBoxedLong(oop obj) {
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96 assert(obj->is_oop(true), "cannot unbox null or non-oop");
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97 return obj->long_field(java_lang_boxing_object::value_offset_in_bytes(T_LONG));
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98 }