Mon, 06 Aug 2012 15:54:45 -0400
7116786: RFE: Detailed information on VerifyErrors
Summary: Provide additional detail in VerifyError messages
Reviewed-by: sspitsyn, acorn
1 /*
2 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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23 */
25 #ifndef SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP
26 #define SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP
28 #include "classfile/dictionary.hpp"
29 #include "classfile/placeholders.hpp"
30 #include "utilities/hashtable.hpp"
32 class LoaderConstraintEntry;
34 class LoaderConstraintTable : public Hashtable<klassOop, mtClass> {
35 friend class VMStructs;
36 private:
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 };
43 LoaderConstraintEntry** find_loader_constraint(Symbol* name,
44 Handle loader);
46 public:
48 LoaderConstraintTable(int nof_buckets);
50 LoaderConstraintEntry* new_entry(unsigned int hash, Symbol* name,
51 klassOop klass, int num_loaders,
52 int max_loaders);
53 void free_entry(LoaderConstraintEntry *entry);
55 LoaderConstraintEntry* bucket(int i) {
56 return (LoaderConstraintEntry*)Hashtable<klassOop, mtClass>::bucket(i);
57 }
59 LoaderConstraintEntry** bucket_addr(int i) {
60 return (LoaderConstraintEntry**)Hashtable<klassOop, mtClass>::bucket_addr(i);
61 }
63 // GC support
64 void oops_do(OopClosure* f);
66 // Check class loader constraints
67 bool add_entry(Symbol* name, klassOop klass1, Handle loader1,
68 klassOop klass2, Handle loader2);
70 // Note: The main entry point for this module is via SystemDictionary.
71 // SystemDictionary::check_signature_loaders(Symbol* signature,
72 // Handle loader1, Handle loader2,
73 // bool is_method, TRAPS)
75 klassOop find_constrained_klass(Symbol* name, Handle loader);
77 // Class loader constraints
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);
85 bool check_or_update(instanceKlassHandle k, Handle loader,
86 Symbol* name);
89 void purge_loader_constraints(BoolObjectClosure* is_alive);
91 void verify(Dictionary* dictionary, PlaceholderTable* placeholders);
92 #ifndef PRODUCT
93 void print();
94 #endif
95 };
97 class LoaderConstraintEntry : public HashtableEntry<klassOop, mtClass> {
98 friend class VMStructs;
99 private:
100 Symbol* _name; // class name
101 int _num_loaders;
102 int _max_loaders;
103 oop* _loaders; // initiating loaders
105 public:
107 klassOop klass() { return literal(); }
108 klassOop* klass_addr() { return literal_addr(); }
109 void set_klass(klassOop k) { set_literal(k); }
111 LoaderConstraintEntry* next() {
112 return (LoaderConstraintEntry*)HashtableEntry<klassOop, mtClass>::next();
113 }
115 LoaderConstraintEntry** next_addr() {
116 return (LoaderConstraintEntry**)HashtableEntry<klassOop, mtClass>::next_addr();
117 }
118 void set_next(LoaderConstraintEntry* next) {
119 HashtableEntry<klassOop, mtClass>::set_next(next);
120 }
122 Symbol* name() { return _name; }
123 void set_name(Symbol* name) {
124 _name = name;
125 if (name != NULL) name->increment_refcount();
126 }
128 int num_loaders() { return _num_loaders; }
129 void set_num_loaders(int i) { _num_loaders = i; }
131 int max_loaders() { return _max_loaders; }
132 void set_max_loaders(int i) { _max_loaders = i; }
134 oop* loaders() { return _loaders; }
135 void set_loaders(oop* loaders) { _loaders = loaders; }
137 oop loader(int i) { return _loaders[i]; }
138 oop* loader_addr(int i) { return &_loaders[i]; }
139 void set_loader(int i, oop p) { _loaders[i] = p; }
141 };
143 #endif // SHARE_VM_CLASSFILE_LOADERCONSTRAINTS_HPP