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