Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjectFactory.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | d25d4ca69222 1d1603768966 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_CI_CIOBJECTFACTORY_HPP |
| 26 #define SHARE_VM_CI_CIOBJECTFACTORY_HPP | |
| 27 | |
| 28 #include "ci/ciClassList.hpp" | |
| 29 #include "ci/ciObject.hpp" | |
| 30 #include "utilities/growableArray.hpp" | |
| 31 | |
| 0 | 32 // ciObjectFactory |
| 33 // | |
| 34 // This class handles requests for the creation of new instances | |
| 35 // of ciObject and its subclasses. It contains a caching mechanism | |
| 36 // which ensures that for each oop, at most one ciObject is created. | |
| 37 // This invariant allows efficient implementation of ciObject. | |
| 38 class ciObjectFactory : public ResourceObj { | |
| 39 private: | |
| 40 static volatile bool _initialized; | |
| 41 static GrowableArray<ciObject*>* _shared_ci_objects; | |
| 42 static ciSymbol* _shared_ci_symbols[]; | |
| 43 static int _shared_ident_limit; | |
| 44 | |
| 45 Arena* _arena; | |
| 46 GrowableArray<ciObject*>* _ci_objects; | |
| 47 GrowableArray<ciMethod*>* _unloaded_methods; | |
| 48 GrowableArray<ciKlass*>* _unloaded_klasses; | |
| 1602 | 49 GrowableArray<ciInstance*>* _unloaded_instances; |
| 0 | 50 GrowableArray<ciReturnAddress*>* _return_addresses; |
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51 GrowableArray<ciSymbol*>* _symbols; // keep list of symbols created |
| 0 | 52 int _next_ident; |
| 53 | |
| 54 public: | |
| 55 struct NonPermObject : public ResourceObj { | |
| 56 ciObject* _object; | |
| 57 NonPermObject* _next; | |
| 58 | |
| 59 inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object); | |
| 60 ciObject* object() { return _object; } | |
| 61 NonPermObject* &next() { return _next; } | |
| 62 }; | |
| 63 private: | |
| 64 enum { NON_PERM_BUCKETS = 61 }; | |
| 65 NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS]; | |
| 66 int _non_perm_count; | |
| 67 | |
| 68 int find(oop key, GrowableArray<ciObject*>* objects); | |
| 69 bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects); | |
| 70 void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects); | |
| 71 ciObject* create_new_object(oop o); | |
| 72 static bool is_equal(NonPermObject* p, oop key) { | |
| 73 return p->object()->get_oop() == key; | |
| 74 } | |
| 75 | |
| 76 NonPermObject* &find_non_perm(oop key); | |
| 77 void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj); | |
| 78 | |
| 79 void init_ident_of(ciObject* obj); | |
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80 void init_ident_of(ciSymbol* obj); |
| 0 | 81 |
| 82 Arena* arena() { return _arena; } | |
| 83 | |
| 84 void print_contents_impl(); | |
| 85 | |
| 1602 | 86 ciInstance* get_unloaded_instance(ciInstanceKlass* klass); |
| 87 | |
| 0 | 88 public: |
| 89 static bool is_initialized() { return _initialized; } | |
| 90 | |
| 91 static void initialize(); | |
| 92 void init_shared_objects(); | |
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93 void remove_symbols(); |
| 0 | 94 |
| 95 ciObjectFactory(Arena* arena, int expected_size); | |
| 96 | |
| 97 // Get the ciObject corresponding to some oop. | |
| 98 ciObject* get(oop key); | |
| 99 | |
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6990754: Use native memory and reference counting to implement SymbolTable
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100 ciSymbol* get_symbol(Symbol* key); |
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101 |
| 0 | 102 // Get the ciSymbol corresponding to one of the vmSymbols. |
| 103 static ciSymbol* vm_symbol_at(int index); | |
| 104 | |
| 105 // Get the ciMethod representing an unloaded/unfound method. | |
| 106 ciMethod* get_unloaded_method(ciInstanceKlass* holder, | |
| 107 ciSymbol* name, | |
| 108 ciSymbol* signature); | |
| 109 | |
| 110 // Get a ciKlass representing an unloaded klass. | |
| 111 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, | |
| 112 ciSymbol* name, | |
| 113 bool create_if_not_found); | |
| 114 | |
| 1602 | 115 // Get a ciInstance representing an unresolved klass mirror. |
| 116 ciInstance* get_unloaded_klass_mirror(ciKlass* type); | |
| 117 | |
| 118 // Get a ciInstance representing an unresolved method handle constant. | |
| 119 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, | |
| 120 ciSymbol* name, | |
| 121 ciSymbol* signature, | |
| 122 int ref_kind); | |
| 123 | |
| 124 // Get a ciInstance representing an unresolved method type constant. | |
| 125 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature); | |
| 126 | |
| 0 | 127 |
| 128 // Get the ciMethodData representing the methodData for a method | |
| 129 // with none. | |
| 130 ciMethodData* get_empty_methodData(); | |
| 131 | |
| 132 ciReturnAddress* get_return_address(int bci); | |
| 133 | |
| 134 void print_contents(); | |
| 135 void print(); | |
| 136 }; | |
| 1972 | 137 |
| 138 #endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP |