1 /* 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 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 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; 49 GrowableArray<ciInstance*>* _unloaded_instances; 50 GrowableArray<ciReturnAddress*>* _return_addresses; 51 int _next_ident; 52 53 public: 54 struct NonPermObject : public ResourceObj { 55 ciObject* _object; 56 NonPermObject* _next; 57 58 inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object); 59 ciObject* object() { return _object; } 60 NonPermObject* &next() { return _next; } 61 }; 62 private: 63 enum { NON_PERM_BUCKETS = 61 }; 64 NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS]; 65 int _non_perm_count; 66 67 int find(oop key, GrowableArray<ciObject*>* objects); 68 bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects); 69 void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects); 70 ciObject* create_new_object(oop o); 71 static bool is_equal(NonPermObject* p, oop key) { 72 return p->object()->get_oop() == key; 73 } 74 75 NonPermObject* &find_non_perm(oop key); 76 void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj); 77 78 void init_ident_of(ciObject* obj); 79 80 Arena* arena() { return _arena; } 81 82 void print_contents_impl(); 83 84 ciInstance* get_unloaded_instance(ciInstanceKlass* klass); 85 86 public: 87 static bool is_initialized() { return _initialized; } 88 89 static void initialize(); 90 void init_shared_objects(); 91 92 ciObjectFactory(Arena* arena, int expected_size); 93 94 95 // Get the ciObject corresponding to some oop. 96 ciObject* get(oop key); 97 98 // Get the ciSymbol corresponding to one of the vmSymbols. 99 static ciSymbol* vm_symbol_at(int index); 100 101 // Get the ciMethod representing an unloaded/unfound method. 102 ciMethod* get_unloaded_method(ciInstanceKlass* holder, 103 ciSymbol* name, 104 ciSymbol* signature); 105 106 // Get a ciKlass representing an unloaded klass. 107 ciKlass* get_unloaded_klass(ciKlass* accessing_klass, 108 ciSymbol* name, 109 bool create_if_not_found); 110 111 // Get a ciInstance representing an unresolved klass mirror. 112 ciInstance* get_unloaded_klass_mirror(ciKlass* type); 113 114 // Get a ciInstance representing an unresolved method handle constant. 115 ciInstance* get_unloaded_method_handle_constant(ciKlass* holder, 116 ciSymbol* name, 117 ciSymbol* signature, 118 int ref_kind); 119 120 // Get a ciInstance representing an unresolved method type constant. 121 ciInstance* get_unloaded_method_type_constant(ciSymbol* signature); 122 123 124 // Get the ciMethodData representing the methodData for a method 125 // with none. 126 ciMethodData* get_empty_methodData(); 127 128 ciReturnAddress* get_return_address(int bci); 129 130 void print_contents(); 131 void print(); 132 }; 133 134 #endif // SHARE_VM_CI_CIOBJECTFACTORY_HPP