Fri, 20 Mar 2009 23:19:36 -0700
6814659: separable cleanups and subroutines for 6655638
Summary: preparatory but separable changes for method handles
Reviewed-by: kvn, never
1 /*
2 * Copyright 2003-2009 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 */
25 class LoaderConstraintEntry;
27 class LoaderConstraintTable : public Hashtable {
28 friend class VMStructs;
29 private:
31 enum Constants {
32 _loader_constraint_size = 107, // number of entries in constraint table
33 _nof_buckets = 1009 // number of buckets in hash table
34 };
36 LoaderConstraintEntry** find_loader_constraint(symbolHandle name,
37 Handle loader);
39 public:
41 LoaderConstraintTable(int nof_buckets);
43 LoaderConstraintEntry* new_entry(unsigned int hash, symbolOop name,
44 klassOop klass, int num_loaders,
45 int max_loaders);
47 LoaderConstraintEntry* bucket(int i) {
48 return (LoaderConstraintEntry*)Hashtable::bucket(i);
49 }
51 LoaderConstraintEntry** bucket_addr(int i) {
52 return (LoaderConstraintEntry**)Hashtable::bucket_addr(i);
53 }
55 // GC support
56 void oops_do(OopClosure* f);
57 void always_strong_classes_do(OopClosure* blk);
59 // Check class loader constraints
60 bool add_entry(symbolHandle name, klassOop klass1, Handle loader1,
61 klassOop klass2, Handle loader2);
63 // Note: The main entry point for this module is via SystemDictionary.
64 // SystemDictionary::check_signature_loaders(symbolHandle signature,
65 // Handle loader1, Handle loader2,
66 // bool is_method, TRAPS)
68 klassOop find_constrained_klass(symbolHandle name, Handle loader);
69 klassOop find_constrained_elem_klass(symbolHandle name, symbolHandle elem_name,
70 Handle loader, TRAPS);
73 // Class loader constraints
75 void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree);
76 void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader,
77 klassOop klass);
78 void merge_loader_constraints(LoaderConstraintEntry** pp1,
79 LoaderConstraintEntry** pp2, klassOop klass);
81 bool check_or_update(instanceKlassHandle k, Handle loader,
82 symbolHandle name);
85 void purge_loader_constraints(BoolObjectClosure* is_alive);
87 void verify(Dictionary* dictionary);
88 #ifndef PRODUCT
89 void print();
90 #endif
91 };
93 class LoaderConstraintEntry : public HashtableEntry {
94 friend class VMStructs;
95 private:
96 symbolOop _name; // class name
97 int _num_loaders;
98 int _max_loaders;
99 oop* _loaders; // initiating loaders
101 public:
103 klassOop klass() { return (klassOop)literal(); }
104 klassOop* klass_addr() { return (klassOop*)literal_addr(); }
105 void set_klass(klassOop k) { set_literal(k); }
107 LoaderConstraintEntry* next() {
108 return (LoaderConstraintEntry*)HashtableEntry::next();
109 }
111 LoaderConstraintEntry** next_addr() {
112 return (LoaderConstraintEntry**)HashtableEntry::next_addr();
113 }
114 void set_next(LoaderConstraintEntry* next) {
115 HashtableEntry::set_next(next);
116 }
118 symbolOop name() { return _name; }
119 symbolOop* name_addr() { return &_name; }
120 void set_name(symbolOop name) { _name = name; }
122 int num_loaders() { return _num_loaders; }
123 void set_num_loaders(int i) { _num_loaders = i; }
125 int max_loaders() { return _max_loaders; }
126 void set_max_loaders(int i) { _max_loaders = i; }
128 oop* loaders() { return _loaders; }
129 void set_loaders(oop* loaders) { _loaders = loaders; }
131 oop loader(int i) { return _loaders[i]; }
132 oop* loader_addr(int i) { return &_loaders[i]; }
133 void set_loader(int i, oop p) { _loaders[i] = p; }
135 };