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comparison src/share/vm/ci/ciObjectFactory.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 5571b97fc1ec c18cbe5936b8
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1 /*
2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // ciObjectFactory
26 //
27 // This class handles requests for the creation of new instances
28 // of ciObject and its subclasses. It contains a caching mechanism
29 // which ensures that for each oop, at most one ciObject is created.
30 // This invariant allows efficient implementation of ciObject.
31 class ciObjectFactory : public ResourceObj {
32 private:
33 static volatile bool _initialized;
34 static GrowableArray<ciObject*>* _shared_ci_objects;
35 static ciSymbol* _shared_ci_symbols[];
36 static int _shared_ident_limit;
37
38 Arena* _arena;
39 GrowableArray<ciObject*>* _ci_objects;
40 GrowableArray<ciMethod*>* _unloaded_methods;
41 GrowableArray<ciKlass*>* _unloaded_klasses;
42 GrowableArray<ciReturnAddress*>* _return_addresses;
43 int _next_ident;
44
45 public:
46 struct NonPermObject : public ResourceObj {
47 ciObject* _object;
48 NonPermObject* _next;
49
50 inline NonPermObject(NonPermObject* &bucket, oop key, ciObject* object);
51 ciObject* object() { return _object; }
52 NonPermObject* &next() { return _next; }
53 };
54 private:
55 enum { NON_PERM_BUCKETS = 61 };
56 NonPermObject* _non_perm_bucket[NON_PERM_BUCKETS];
57 int _non_perm_count;
58
59 int find(oop key, GrowableArray<ciObject*>* objects);
60 bool is_found_at(int index, oop key, GrowableArray<ciObject*>* objects);
61 void insert(int index, ciObject* obj, GrowableArray<ciObject*>* objects);
62 ciObject* create_new_object(oop o);
63 static bool is_equal(NonPermObject* p, oop key) {
64 return p->object()->get_oop() == key;
65 }
66
67 NonPermObject* &find_non_perm(oop key);
68 void insert_non_perm(NonPermObject* &where, oop key, ciObject* obj);
69
70 void init_ident_of(ciObject* obj);
71
72 Arena* arena() { return _arena; }
73
74 void print_contents_impl();
75
76 public:
77 static bool is_initialized() { return _initialized; }
78
79 static void initialize();
80 void init_shared_objects();
81
82 ciObjectFactory(Arena* arena, int expected_size);
83
84
85 // Get the ciObject corresponding to some oop.
86 ciObject* get(oop key);
87
88 // Get the ciSymbol corresponding to one of the vmSymbols.
89 static ciSymbol* vm_symbol_at(int index);
90
91 // Get the ciMethod representing an unloaded/unfound method.
92 ciMethod* get_unloaded_method(ciInstanceKlass* holder,
93 ciSymbol* name,
94 ciSymbol* signature);
95
96 // Get a ciKlass representing an unloaded klass.
97 ciKlass* get_unloaded_klass(ciKlass* accessing_klass,
98 ciSymbol* name,
99 bool create_if_not_found);
100
101
102 // Get the ciMethodData representing the methodData for a method
103 // with none.
104 ciMethodData* get_empty_methodData();
105
106 ciReturnAddress* get_return_address(int bci);
107
108 void print_contents();
109 void print();
110 };