src/share/vm/oops/klassVtable.hpp

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   1 /*
   2  * Copyright (c) 1997, 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.
  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(int &vtable_length, int &num_miranda_methods,
  88                                                    klassOop super, objArrayOop methods,
  89                                                    AccessFlags class_flags, Handle classloader,
  90                                                    Symbol* classname, objArrayOop local_interfaces,
  91                                                    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(methodOop* old_methods, methodOop* new_methods,
 100                              int methods_length, bool * trace_name_printed);


 101 
 102   // Garbage collection
 103   void oop_follow_contents();
 104   void oop_adjust_pointers();
 105 
 106 #ifndef SERIALGC
 107   // Parallel Old
 108   void oop_follow_contents(ParCompactionManager* cm);
 109   void oop_update_pointers(ParCompactionManager* cm);
 110 #endif // SERIALGC
 111 
 112   // Iterators
 113   void oop_oop_iterate(OopClosure* blk);
 114   void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);
 115 
 116   // Debugging code
 117   void print()                                              PRODUCT_RETURN;
 118   void verify(outputStream* st, bool force = false);
 119   static void print_statistics()                            PRODUCT_RETURN;
 120 
 121 #ifndef PRODUCT
 122   bool check_no_old_entries();
 123   void dump_vtable();
 124 #endif
 125 
 126  protected:
 127   friend class vtableEntry;
 128  private:
 129   enum { VTABLE_TRANSITIVE_OVERRIDE_VERSION = 51 } ;
 130   void copy_vtable_to(vtableEntry* start);
 131   int  initialize_from_super(KlassHandle super);
 132   int  index_of(methodOop m, int len) const; // same as index_of, but search only up to len
 133   void put_method_at(methodOop m, int index);
 134   static bool needs_new_vtable_entry(methodHandle m, klassOop super, Handle classloader, Symbol* classname, AccessFlags access_flags, TRAPS);
 135 
 136   bool update_inherited_vtable(instanceKlass* klass, methodHandle target_method, int super_vtable_len, bool checkconstraints, TRAPS);
 137  instanceKlass* find_transitive_override(instanceKlass* initialsuper, methodHandle target_method, int vtable_index,
 138                                          Handle target_loader, Symbol* target_classname, Thread* THREAD);
 139 
 140   // support for miranda methods
 141   bool is_miranda_entry_at(int i);
 142   void fill_in_mirandas(int& initialized);
 143   static bool is_miranda(methodOop m, objArrayOop class_methods, klassOop super);
 144   static void add_new_mirandas_to_list(GrowableArray<methodOop>* list_of_current_mirandas, objArrayOop current_interface_methods, objArrayOop class_methods, klassOop super);
 145   static void get_mirandas(GrowableArray<methodOop>* mirandas, klassOop super, objArrayOop class_methods, objArrayOop local_interfaces);


 275 
 276   itableMethodEntry* method_entry(int i) { assert(0 <= i && i <= _size_method_table, "index out of bounds");
 277                                            return &((itableMethodEntry*)method_start())[i]; }
 278 
 279   int size_offset_table()                { return _size_offset_table; }
 280 
 281   // Initialization
 282   void initialize_itable(bool checkconstraints, TRAPS);
 283 
 284   // Updates
 285   void initialize_with_method(methodOop m);
 286 
 287   // RedefineClasses() API support:
 288   // if any entry of this itable points to any of old_methods,
 289   // replace it with the corresponding new_method.
 290   // trace_name_printed is set to true if the current call has
 291   // printed the klass name so that other routines in the adjust_*
 292   // group don't print the klass name.
 293   void adjust_method_entries(methodOop* old_methods, methodOop* new_methods,
 294                              int methods_length, bool * trace_name_printed);


 295 
 296   // Garbage collection
 297   void oop_follow_contents();
 298   void oop_adjust_pointers();
 299 
 300 #ifndef SERIALGC
 301   // Parallel Old
 302   void oop_follow_contents(ParCompactionManager* cm);
 303   void oop_update_pointers(ParCompactionManager* cm);
 304 #endif // SERIALGC
 305 
 306   // Iterators
 307   void oop_oop_iterate(OopClosure* blk);
 308   void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);
 309 
 310   // Setup of itable
 311   static int compute_itable_size(objArrayHandle transitive_interfaces);
 312   static void setup_itable_offset_table(instanceKlassHandle klass);
 313 
 314   // Resolving of method to index


   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(int &vtable_length, int &num_miranda_methods,
  88                                                    klassOop super, objArrayOop methods,
  89                                                    AccessFlags class_flags, Handle classloader,
  90                                                    Symbol* classname, objArrayOop local_interfaces,
  91                                                    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(methodOop* old_methods, methodOop* new_methods,
 100                              int methods_length, bool * trace_name_printed);
 101   bool check_no_old_or_obsolete_entries();
 102   void dump_vtable();
 103 
 104   // Garbage collection
 105   void oop_follow_contents();
 106   void oop_adjust_pointers();
 107 
 108 #ifndef SERIALGC
 109   // Parallel Old
 110   void oop_follow_contents(ParCompactionManager* cm);
 111   void oop_update_pointers(ParCompactionManager* cm);
 112 #endif // SERIALGC
 113 
 114   // Iterators
 115   void oop_oop_iterate(OopClosure* blk);
 116   void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);
 117 
 118   // Debugging code
 119   void print()                                              PRODUCT_RETURN;
 120   void verify(outputStream* st, bool force = false);
 121   static void print_statistics()                            PRODUCT_RETURN;
 122 





 123  protected:
 124   friend class vtableEntry;
 125  private:
 126   enum { VTABLE_TRANSITIVE_OVERRIDE_VERSION = 51 } ;
 127   void copy_vtable_to(vtableEntry* start);
 128   int  initialize_from_super(KlassHandle super);
 129   int  index_of(methodOop m, int len) const; // same as index_of, but search only up to len
 130   void put_method_at(methodOop m, int index);
 131   static bool needs_new_vtable_entry(methodHandle m, klassOop super, Handle classloader, Symbol* classname, AccessFlags access_flags, TRAPS);
 132 
 133   bool update_inherited_vtable(instanceKlass* klass, methodHandle target_method, int super_vtable_len, bool checkconstraints, TRAPS);
 134  instanceKlass* find_transitive_override(instanceKlass* initialsuper, methodHandle target_method, int vtable_index,
 135                                          Handle target_loader, Symbol* target_classname, Thread* THREAD);
 136 
 137   // support for miranda methods
 138   bool is_miranda_entry_at(int i);
 139   void fill_in_mirandas(int& initialized);
 140   static bool is_miranda(methodOop m, objArrayOop class_methods, klassOop super);
 141   static void add_new_mirandas_to_list(GrowableArray<methodOop>* list_of_current_mirandas, objArrayOop current_interface_methods, objArrayOop class_methods, klassOop super);
 142   static void get_mirandas(GrowableArray<methodOop>* mirandas, klassOop super, objArrayOop class_methods, objArrayOop local_interfaces);


 272 
 273   itableMethodEntry* method_entry(int i) { assert(0 <= i && i <= _size_method_table, "index out of bounds");
 274                                            return &((itableMethodEntry*)method_start())[i]; }
 275 
 276   int size_offset_table()                { return _size_offset_table; }
 277 
 278   // Initialization
 279   void initialize_itable(bool checkconstraints, TRAPS);
 280 
 281   // Updates
 282   void initialize_with_method(methodOop m);
 283 
 284   // RedefineClasses() API support:
 285   // if any entry of this itable points to any of old_methods,
 286   // replace it with the corresponding new_method.
 287   // trace_name_printed is set to true if the current call has
 288   // printed the klass name so that other routines in the adjust_*
 289   // group don't print the klass name.
 290   void adjust_method_entries(methodOop* old_methods, methodOop* new_methods,
 291                              int methods_length, bool * trace_name_printed);
 292   bool check_no_old_or_obsolete_entries();
 293   void dump_itable();
 294 
 295   // Garbage collection
 296   void oop_follow_contents();
 297   void oop_adjust_pointers();
 298 
 299 #ifndef SERIALGC
 300   // Parallel Old
 301   void oop_follow_contents(ParCompactionManager* cm);
 302   void oop_update_pointers(ParCompactionManager* cm);
 303 #endif // SERIALGC
 304 
 305   // Iterators
 306   void oop_oop_iterate(OopClosure* blk);
 307   void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);
 308 
 309   // Setup of itable
 310   static int compute_itable_size(objArrayHandle transitive_interfaces);
 311   static void setup_itable_offset_table(instanceKlassHandle klass);
 312 
 313   // Resolving of method to index