1 /*
2 * Copyright (c) 1997, 2012, 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.
22 *
81 // be initialized at run time by RedefineClasses so dumping the right order
82 // is necessary.
83 void clear_vtable();
84 bool is_initialized();
85
86 // computes vtable length (in words) and the number of miranda methods
87 static void compute_vtable_size_and_num_mirandas(
88 int* vtable_length, int* num_new_mirandas,
89 GrowableArray<Method*>* all_mirandas, Klass* super,
90 Array<Method*>* methods, AccessFlags class_flags, Handle classloader,
91 Symbol* classname, Array<Klass*>* local_interfaces, TRAPS);
92
93 // RedefineClasses() API support:
94 // If any entry of this vtable points to any of old_methods,
95 // replace it with the corresponding new_method.
96 // trace_name_printed is set to true if the current call has
97 // printed the klass name so that other routines in the adjust_*
98 // group don't print the klass name.
99 void adjust_method_entries(Method** old_methods, Method** new_methods,
100 int methods_length, bool * trace_name_printed);
101
102 // Debugging code
103 void print() PRODUCT_RETURN;
104 void verify(outputStream* st, bool force = false);
105 static void print_statistics() PRODUCT_RETURN;
106
107 #ifndef PRODUCT
108 bool check_no_old_entries();
109 void dump_vtable();
110 #endif
111
112 protected:
113 friend class vtableEntry;
114 private:
115 enum { VTABLE_TRANSITIVE_OVERRIDE_VERSION = 51 } ;
116 void copy_vtable_to(vtableEntry* start);
117 int initialize_from_super(KlassHandle super);
118 int index_of(Method* m, int len) const; // same as index_of, but search only up to len
119 void put_method_at(Method* m, int index);
120 static bool needs_new_vtable_entry(methodHandle m, Klass* super, Handle classloader, Symbol* classname, AccessFlags access_flags, TRAPS);
121
122 bool update_inherited_vtable(InstanceKlass* klass, methodHandle target_method, int super_vtable_len, bool checkconstraints, TRAPS);
123 InstanceKlass* find_transitive_override(InstanceKlass* initialsuper, methodHandle target_method, int vtable_index,
124 Handle target_loader, Symbol* target_classname, Thread* THREAD);
125
126 // support for miranda methods
127 bool is_miranda_entry_at(int i);
128 void fill_in_mirandas(int* initialized);
129 static bool is_miranda(Method* m, Array<Method*>* class_methods, Klass* super);
130 static void add_new_mirandas_to_lists(
131 GrowableArray<Method*>* new_mirandas,
266
267 itableMethodEntry* method_entry(int i) { assert(0 <= i && i <= _size_method_table, "index out of bounds");
268 return &((itableMethodEntry*)method_start())[i]; }
269
270 int size_offset_table() { return _size_offset_table; }
271
272 // Initialization
273 void initialize_itable(bool checkconstraints, TRAPS);
274
275 // Updates
276 void initialize_with_method(Method* m);
277
278 // RedefineClasses() API support:
279 // if any entry of this itable points to any of old_methods,
280 // replace it with the corresponding new_method.
281 // trace_name_printed is set to true if the current call has
282 // printed the klass name so that other routines in the adjust_*
283 // group don't print the klass name.
284 void adjust_method_entries(Method** old_methods, Method** new_methods,
285 int methods_length, bool * trace_name_printed);
286
287 // Setup of itable
288 static int compute_itable_size(Array<Klass*>* transitive_interfaces);
289 static void setup_itable_offset_table(instanceKlassHandle klass);
290
291 // Resolving of method to index
292 static int compute_itable_index(Method* m);
293 // ...and back again:
294 static Method* method_for_itable_index(Klass* klass, int itable_index);
295
296 // Debugging/Statistics
297 static void print_statistics() PRODUCT_RETURN;
298 private:
299 intptr_t* vtable_start() const { return ((intptr_t*)_klass()) + _table_offset; }
300 intptr_t* method_start() const { return vtable_start() + _size_offset_table * itableOffsetEntry::size(); }
301
302 // Helper methods
303 static int calc_itable_size(int num_interfaces, int num_methods) { return (num_interfaces * itableOffsetEntry::size()) + (num_methods * itableMethodEntry::size()); }
304
305 // Statistics
306 NOT_PRODUCT(static int _total_classes;) // Total no. of classes with itables
307 NOT_PRODUCT(static long _total_size;) // Total no. of bytes used for itables
308
309 static void update_stats(int size) PRODUCT_RETURN NOT_PRODUCT({ _total_classes++; _total_size += size; })
310
311 public:
312 #ifndef PRODUCT
313 bool check_no_old_entries();
314 #endif
315 };
316
317 #endif // SHARE_VM_OOPS_KLASSVTABLE_HPP
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1 /*
2 * Copyright (c) 1997, 2013, 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.
22 *
81 // be initialized at run time by RedefineClasses so dumping the right order
82 // is necessary.
83 void clear_vtable();
84 bool is_initialized();
85
86 // computes vtable length (in words) and the number of miranda methods
87 static void compute_vtable_size_and_num_mirandas(
88 int* vtable_length, int* num_new_mirandas,
89 GrowableArray<Method*>* all_mirandas, Klass* super,
90 Array<Method*>* methods, AccessFlags class_flags, Handle classloader,
91 Symbol* classname, Array<Klass*>* local_interfaces, TRAPS);
92
93 // RedefineClasses() API support:
94 // If any entry of this vtable points to any of old_methods,
95 // replace it with the corresponding new_method.
96 // trace_name_printed is set to true if the current call has
97 // printed the klass name so that other routines in the adjust_*
98 // group don't print the klass name.
99 void adjust_method_entries(Method** old_methods, Method** new_methods,
100 int methods_length, bool * trace_name_printed);
101 bool check_no_old_or_obsolete_entries();
102 void dump_vtable();
103
104 // Debugging code
105 void print() PRODUCT_RETURN;
106 void verify(outputStream* st, bool force = false);
107 static void print_statistics() PRODUCT_RETURN;
108
109 protected:
110 friend class vtableEntry;
111 private:
112 enum { VTABLE_TRANSITIVE_OVERRIDE_VERSION = 51 } ;
113 void copy_vtable_to(vtableEntry* start);
114 int initialize_from_super(KlassHandle super);
115 int index_of(Method* m, int len) const; // same as index_of, but search only up to len
116 void put_method_at(Method* m, int index);
117 static bool needs_new_vtable_entry(methodHandle m, Klass* super, Handle classloader, Symbol* classname, AccessFlags access_flags, TRAPS);
118
119 bool update_inherited_vtable(InstanceKlass* klass, methodHandle target_method, int super_vtable_len, bool checkconstraints, TRAPS);
120 InstanceKlass* find_transitive_override(InstanceKlass* initialsuper, methodHandle target_method, int vtable_index,
121 Handle target_loader, Symbol* target_classname, Thread* THREAD);
122
123 // support for miranda methods
124 bool is_miranda_entry_at(int i);
125 void fill_in_mirandas(int* initialized);
126 static bool is_miranda(Method* m, Array<Method*>* class_methods, Klass* super);
127 static void add_new_mirandas_to_lists(
128 GrowableArray<Method*>* new_mirandas,
263
264 itableMethodEntry* method_entry(int i) { assert(0 <= i && i <= _size_method_table, "index out of bounds");
265 return &((itableMethodEntry*)method_start())[i]; }
266
267 int size_offset_table() { return _size_offset_table; }
268
269 // Initialization
270 void initialize_itable(bool checkconstraints, TRAPS);
271
272 // Updates
273 void initialize_with_method(Method* m);
274
275 // RedefineClasses() API support:
276 // if any entry of this itable points to any of old_methods,
277 // replace it with the corresponding new_method.
278 // trace_name_printed is set to true if the current call has
279 // printed the klass name so that other routines in the adjust_*
280 // group don't print the klass name.
281 void adjust_method_entries(Method** old_methods, Method** new_methods,
282 int methods_length, bool * trace_name_printed);
283 bool check_no_old_or_obsolete_entries();
284 void dump_itable();
285
286 // Setup of itable
287 static int compute_itable_size(Array<Klass*>* transitive_interfaces);
288 static void setup_itable_offset_table(instanceKlassHandle klass);
289
290 // Resolving of method to index
291 static int compute_itable_index(Method* m);
292 // ...and back again:
293 static Method* method_for_itable_index(Klass* klass, int itable_index);
294
295 // Debugging/Statistics
296 static void print_statistics() PRODUCT_RETURN;
297 private:
298 intptr_t* vtable_start() const { return ((intptr_t*)_klass()) + _table_offset; }
299 intptr_t* method_start() const { return vtable_start() + _size_offset_table * itableOffsetEntry::size(); }
300
301 // Helper methods
302 static int calc_itable_size(int num_interfaces, int num_methods) { return (num_interfaces * itableOffsetEntry::size()) + (num_methods * itableMethodEntry::size()); }
303
304 // Statistics
305 NOT_PRODUCT(static int _total_classes;) // Total no. of classes with itables
306 NOT_PRODUCT(static long _total_size;) // Total no. of bytes used for itables
307
308 static void update_stats(int size) PRODUCT_RETURN NOT_PRODUCT({ _total_classes++; _total_size += size; })
309 };
310
311 #endif // SHARE_VM_OOPS_KLASSVTABLE_HPP
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