Mercurial > hg > truffle
annotate src/share/vm/classfile/loaderConstraints.hpp @ 2048:177398c6147d
Added unique concrete subtype assumption.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Mon, 10 Jan 2011 10:50:22 +0100 |
parents | f95d63e2154a |
children | 3582bf76420e |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2003, 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_CLASSFILE_LOADERCONSTRAINTS_HPP |
26 #define SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP | |
27 | |
28 #include "classfile/dictionary.hpp" | |
29 #include "classfile/placeholders.hpp" | |
30 #include "utilities/hashtable.hpp" | |
31 | |
0 | 32 class LoaderConstraintEntry; |
33 | |
34 class LoaderConstraintTable : public Hashtable { | |
35 friend class VMStructs; | |
36 private: | |
37 | |
38 enum Constants { | |
39 _loader_constraint_size = 107, // number of entries in constraint table | |
40 _nof_buckets = 1009 // number of buckets in hash table | |
41 }; | |
42 | |
43 LoaderConstraintEntry** find_loader_constraint(symbolHandle name, | |
44 Handle loader); | |
45 | |
46 public: | |
47 | |
48 LoaderConstraintTable(int nof_buckets); | |
49 | |
50 LoaderConstraintEntry* new_entry(unsigned int hash, symbolOop name, | |
51 klassOop klass, int num_loaders, | |
52 int max_loaders); | |
53 | |
54 LoaderConstraintEntry* bucket(int i) { | |
55 return (LoaderConstraintEntry*)Hashtable::bucket(i); | |
56 } | |
57 | |
58 LoaderConstraintEntry** bucket_addr(int i) { | |
59 return (LoaderConstraintEntry**)Hashtable::bucket_addr(i); | |
60 } | |
61 | |
62 // GC support | |
63 void oops_do(OopClosure* f); | |
64 void always_strong_classes_do(OopClosure* blk); | |
65 | |
66 // Check class loader constraints | |
67 bool add_entry(symbolHandle name, klassOop klass1, Handle loader1, | |
68 klassOop klass2, Handle loader2); | |
69 | |
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70 // Note: The main entry point for this module is via SystemDictionary. |
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71 // SystemDictionary::check_signature_loaders(symbolHandle signature, |
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72 // Handle loader1, Handle loader2, |
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73 // bool is_method, TRAPS) |
0 | 74 |
75 klassOop find_constrained_klass(symbolHandle name, Handle loader); | |
76 | |
77 // Class loader constraints | |
78 | |
79 void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree); | |
80 void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader, | |
81 klassOop klass); | |
82 void merge_loader_constraints(LoaderConstraintEntry** pp1, | |
83 LoaderConstraintEntry** pp2, klassOop klass); | |
84 | |
85 bool check_or_update(instanceKlassHandle k, Handle loader, | |
86 symbolHandle name); | |
87 | |
88 | |
89 void purge_loader_constraints(BoolObjectClosure* is_alive); | |
90 | |
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91 void verify(Dictionary* dictionary, PlaceholderTable* placeholders); |
0 | 92 #ifndef PRODUCT |
93 void print(); | |
94 #endif | |
95 }; | |
96 | |
97 class LoaderConstraintEntry : public HashtableEntry { | |
98 friend class VMStructs; | |
99 private: | |
100 symbolOop _name; // class name | |
101 int _num_loaders; | |
102 int _max_loaders; | |
103 oop* _loaders; // initiating loaders | |
104 | |
105 public: | |
106 | |
107 klassOop klass() { return (klassOop)literal(); } | |
108 klassOop* klass_addr() { return (klassOop*)literal_addr(); } | |
109 void set_klass(klassOop k) { set_literal(k); } | |
110 | |
111 LoaderConstraintEntry* next() { | |
112 return (LoaderConstraintEntry*)HashtableEntry::next(); | |
113 } | |
114 | |
115 LoaderConstraintEntry** next_addr() { | |
116 return (LoaderConstraintEntry**)HashtableEntry::next_addr(); | |
117 } | |
118 void set_next(LoaderConstraintEntry* next) { | |
119 HashtableEntry::set_next(next); | |
120 } | |
121 | |
122 symbolOop name() { return _name; } | |
123 symbolOop* name_addr() { return &_name; } | |
124 void set_name(symbolOop name) { _name = name; } | |
125 | |
126 int num_loaders() { return _num_loaders; } | |
127 void set_num_loaders(int i) { _num_loaders = i; } | |
128 | |
129 int max_loaders() { return _max_loaders; } | |
130 void set_max_loaders(int i) { _max_loaders = i; } | |
131 | |
132 oop* loaders() { return _loaders; } | |
133 void set_loaders(oop* loaders) { _loaders = loaders; } | |
134 | |
135 oop loader(int i) { return _loaders[i]; } | |
136 oop* loader_addr(int i) { return &_loaders[i]; } | |
137 void set_loader(int i, oop p) { _loaders[i] = p; } | |
138 | |
139 }; | |
1972 | 140 |
141 #endif // SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP |