0
|
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 };
|