Thu, 11 Apr 2013 09:08:15 -0700
8011972: Field can be erroneously marked as contended when @Contended annotation isn't present
Reviewed-by: kvn, kmo, shade
duke@435 | 1 | /* |
coleenp@4037 | 2 | * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP |
stefank@2314 | 26 | #define SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP |
stefank@2314 | 27 | |
stefank@2314 | 28 | #include "classfile/dictionary.hpp" |
stefank@2314 | 29 | #include "classfile/placeholders.hpp" |
stefank@2314 | 30 | #include "utilities/hashtable.hpp" |
stefank@2314 | 31 | |
duke@435 | 32 | class LoaderConstraintEntry; |
coleenp@4037 | 33 | class Symbol; |
duke@435 | 34 | |
coleenp@4037 | 35 | class LoaderConstraintTable : public Hashtable<Klass*, mtClass> { |
duke@435 | 36 | friend class VMStructs; |
duke@435 | 37 | private: |
duke@435 | 38 | |
duke@435 | 39 | enum Constants { |
duke@435 | 40 | _loader_constraint_size = 107, // number of entries in constraint table |
duke@435 | 41 | _nof_buckets = 1009 // number of buckets in hash table |
duke@435 | 42 | }; |
duke@435 | 43 | |
coleenp@2497 | 44 | LoaderConstraintEntry** find_loader_constraint(Symbol* name, |
duke@435 | 45 | Handle loader); |
duke@435 | 46 | |
duke@435 | 47 | public: |
duke@435 | 48 | |
duke@435 | 49 | LoaderConstraintTable(int nof_buckets); |
duke@435 | 50 | |
coleenp@2497 | 51 | LoaderConstraintEntry* new_entry(unsigned int hash, Symbol* name, |
coleenp@4037 | 52 | Klass* klass, int num_loaders, |
duke@435 | 53 | int max_loaders); |
coleenp@2497 | 54 | void free_entry(LoaderConstraintEntry *entry); |
duke@435 | 55 | |
duke@435 | 56 | LoaderConstraintEntry* bucket(int i) { |
coleenp@4037 | 57 | return (LoaderConstraintEntry*)Hashtable<Klass*, mtClass>::bucket(i); |
duke@435 | 58 | } |
duke@435 | 59 | |
duke@435 | 60 | LoaderConstraintEntry** bucket_addr(int i) { |
coleenp@4037 | 61 | return (LoaderConstraintEntry**)Hashtable<Klass*, mtClass>::bucket_addr(i); |
duke@435 | 62 | } |
duke@435 | 63 | |
coleenp@4037 | 64 | // Enhanced Class Redefinition support |
coleenp@4037 | 65 | void classes_do(KlassClosure* f); |
duke@435 | 66 | |
duke@435 | 67 | // Check class loader constraints |
coleenp@4037 | 68 | bool add_entry(Symbol* name, Klass* klass1, Handle loader1, |
coleenp@4037 | 69 | Klass* klass2, Handle loader2); |
duke@435 | 70 | |
jrose@1100 | 71 | // Note: The main entry point for this module is via SystemDictionary. |
coleenp@2497 | 72 | // SystemDictionary::check_signature_loaders(Symbol* signature, |
jrose@1100 | 73 | // Handle loader1, Handle loader2, |
jrose@1100 | 74 | // bool is_method, TRAPS) |
duke@435 | 75 | |
coleenp@4037 | 76 | Klass* find_constrained_klass(Symbol* name, Handle loader); |
duke@435 | 77 | |
duke@435 | 78 | // Class loader constraints |
duke@435 | 79 | |
duke@435 | 80 | void ensure_loader_constraint_capacity(LoaderConstraintEntry *p, int nfree); |
duke@435 | 81 | void extend_loader_constraint(LoaderConstraintEntry* p, Handle loader, |
coleenp@4037 | 82 | Klass* klass); |
duke@435 | 83 | void merge_loader_constraints(LoaderConstraintEntry** pp1, |
coleenp@4037 | 84 | LoaderConstraintEntry** pp2, Klass* klass); |
duke@435 | 85 | |
duke@435 | 86 | bool check_or_update(instanceKlassHandle k, Handle loader, |
coleenp@2497 | 87 | Symbol* name); |
duke@435 | 88 | |
duke@435 | 89 | |
coleenp@4037 | 90 | void purge_loader_constraints(); |
duke@435 | 91 | |
tonyp@1693 | 92 | void verify(Dictionary* dictionary, PlaceholderTable* placeholders); |
duke@435 | 93 | #ifndef PRODUCT |
duke@435 | 94 | void print(); |
duke@435 | 95 | #endif |
duke@435 | 96 | }; |
duke@435 | 97 | |
coleenp@4037 | 98 | class LoaderConstraintEntry : public HashtableEntry<Klass*, mtClass> { |
duke@435 | 99 | friend class VMStructs; |
duke@435 | 100 | private: |
coleenp@2497 | 101 | Symbol* _name; // class name |
duke@435 | 102 | int _num_loaders; |
duke@435 | 103 | int _max_loaders; |
coleenp@4037 | 104 | // Loader constraints enforce correct linking behavior. |
coleenp@4037 | 105 | // Thus, it really operates on ClassLoaderData which represents linking domain, |
coleenp@4037 | 106 | // not class loaders. |
coleenp@4037 | 107 | ClassLoaderData** _loaders; // initiating loaders |
duke@435 | 108 | |
duke@435 | 109 | public: |
duke@435 | 110 | |
coleenp@4037 | 111 | Klass* klass() { return literal(); } |
coleenp@4037 | 112 | Klass** klass_addr() { return literal_addr(); } |
coleenp@4037 | 113 | void set_klass(Klass* k) { set_literal(k); } |
duke@435 | 114 | |
duke@435 | 115 | LoaderConstraintEntry* next() { |
coleenp@4037 | 116 | return (LoaderConstraintEntry*)HashtableEntry<Klass*, mtClass>::next(); |
duke@435 | 117 | } |
duke@435 | 118 | |
duke@435 | 119 | LoaderConstraintEntry** next_addr() { |
coleenp@4037 | 120 | return (LoaderConstraintEntry**)HashtableEntry<Klass*, mtClass>::next_addr(); |
duke@435 | 121 | } |
duke@435 | 122 | void set_next(LoaderConstraintEntry* next) { |
coleenp@4037 | 123 | HashtableEntry<Klass*, mtClass>::set_next(next); |
duke@435 | 124 | } |
duke@435 | 125 | |
coleenp@2497 | 126 | Symbol* name() { return _name; } |
coleenp@2497 | 127 | void set_name(Symbol* name) { |
coleenp@2497 | 128 | _name = name; |
coleenp@2497 | 129 | if (name != NULL) name->increment_refcount(); |
coleenp@2497 | 130 | } |
duke@435 | 131 | |
duke@435 | 132 | int num_loaders() { return _num_loaders; } |
duke@435 | 133 | void set_num_loaders(int i) { _num_loaders = i; } |
duke@435 | 134 | |
duke@435 | 135 | int max_loaders() { return _max_loaders; } |
duke@435 | 136 | void set_max_loaders(int i) { _max_loaders = i; } |
duke@435 | 137 | |
coleenp@4037 | 138 | ClassLoaderData** loaders() { return _loaders; } |
coleenp@4037 | 139 | void set_loaders(ClassLoaderData** loaders) { _loaders = loaders; } |
duke@435 | 140 | |
coleenp@4037 | 141 | ClassLoaderData* loader_data(int i) { return _loaders[i]; } |
coleenp@4037 | 142 | void set_loader_data(int i, ClassLoaderData* p) { _loaders[i] = p; } |
coleenp@4037 | 143 | // convenience |
coleenp@4037 | 144 | void set_loader(int i, oop p); |
duke@435 | 145 | }; |
stefank@2314 | 146 | |
stefank@2314 | 147 | #endif // SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP |