duke@435: /*
trims@1907:  * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: // arrayKlass is the abstract baseclass for all array classes
duke@435: 
duke@435: class arrayKlass: public Klass {
duke@435:   friend class VMStructs;
duke@435:  private:
duke@435:   int      _dimension;         // This is n'th-dimensional array.
duke@435:   klassOop _higher_dimension;  // Refers the (n+1)'th-dimensional array (if present).
duke@435:   klassOop _lower_dimension;   // Refers the (n-1)'th-dimensional array (if present).
duke@435:   int      _vtable_len;        // size of vtable for this klass
duke@435:   juint    _alloc_size;        // allocation profiling support
duke@435:   oop      _component_mirror;  // component type, as a java/lang/Class
duke@435: 
duke@435:  public:
duke@435:   // Testing operation
duke@435:   bool oop_is_array() const { return true; }
duke@435: 
duke@435:   // Instance variables
duke@435:   int dimension() const                 { return _dimension;      }
duke@435:   void set_dimension(int dimension)     { _dimension = dimension; }
duke@435: 
duke@435:   klassOop higher_dimension() const     { return _higher_dimension; }
duke@435:   void set_higher_dimension(klassOop k) { oop_store_without_check((oop*) &_higher_dimension, (oop) k); }
duke@435:   oop* adr_higher_dimension()           { return (oop*)&this->_higher_dimension;}
duke@435: 
duke@435:   klassOop lower_dimension() const      { return _lower_dimension; }
duke@435:   void set_lower_dimension(klassOop k)  { oop_store_without_check((oop*) &_lower_dimension, (oop) k); }
duke@435:   oop* adr_lower_dimension()            { return (oop*)&this->_lower_dimension;}
duke@435: 
duke@435:   // Allocation profiling support
duke@435:   juint alloc_size() const              { return _alloc_size; }
duke@435:   void set_alloc_size(juint n)          { _alloc_size = n; }
duke@435: 
duke@435:   // offset of first element, including any padding for the sake of alignment
duke@435:   int  array_header_in_bytes() const    { return layout_helper_header_size(layout_helper()); }
duke@435:   int  log2_element_size() const        { return layout_helper_log2_element_size(layout_helper()); }
duke@435:   // type of elements (T_OBJECT for both oop arrays and array-arrays)
duke@435:   BasicType element_type() const        { return layout_helper_element_type(layout_helper()); }
duke@435: 
duke@435:   oop  component_mirror() const         { return _component_mirror; }
duke@435:   void set_component_mirror(oop m)      { oop_store((oop*) &_component_mirror, m); }
duke@435:   oop* adr_component_mirror()           { return (oop*)&this->_component_mirror;}
duke@435: 
duke@435:   // Compiler/Interpreter offset
duke@435:   static ByteSize component_mirror_offset() { return byte_offset_of(arrayKlass, _component_mirror); }
duke@435: 
never@1577:   virtual klassOop java_super() const;//{ return SystemDictionary::Object_klass(); }
duke@435: 
duke@435:   // Allocation
duke@435:   // Sizes points to the first dimension of the array, subsequent dimensions
duke@435:   // are always in higher memory.  The callers of these set that up.
duke@435:   virtual oop multi_allocate(int rank, jint* sizes, TRAPS);
duke@435:   objArrayOop allocate_arrayArray(int n, int length, TRAPS);
duke@435: 
duke@435:   // Lookup operations
duke@435:   methodOop uncached_lookup_method(symbolOop name, symbolOop signature) const;
duke@435: 
duke@435:   // Casting from klassOop
duke@435:   static arrayKlass* cast(klassOop k) {
duke@435:     Klass* kp = k->klass_part();
duke@435:     assert(kp->null_vtbl() || kp->oop_is_array(), "cast to arrayKlass");
duke@435:     return (arrayKlass*) kp;
duke@435:   }
duke@435: 
duke@435:   objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
duke@435:   bool compute_is_subtype_of(klassOop k);
duke@435: 
duke@435:   // Sizing
duke@435:   static int header_size()                 { return oopDesc::header_size() + sizeof(arrayKlass)/HeapWordSize; }
duke@435:   int object_size(int header_size) const;
duke@435: 
duke@435:   bool object_is_parsable() const          { return _vtable_len > 0; }
duke@435: 
duke@435:   // Java vtable
duke@435:   klassVtable* vtable() const;             // return new klassVtable
duke@435:   int  vtable_length() const               { return _vtable_len; }
duke@435:   static int base_vtable_length()          { return Universe::base_vtable_size(); }
duke@435:   void set_vtable_length(int len)          { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }
duke@435:  protected:
duke@435:   inline intptr_t* start_of_vtable() const;
duke@435: 
duke@435:  public:
duke@435:   // Iterators
duke@435:   void array_klasses_do(void f(klassOop k));
duke@435:   void with_array_klasses_do(void f(klassOop k));
duke@435: 
duke@435:   // Shared creation method
duke@435:   static arrayKlassHandle base_create_array_klass(
duke@435:                                           const Klass_vtbl& vtbl,
duke@435:                                           int header_size, KlassHandle klass,
duke@435:                                           TRAPS);
duke@435:   // Return a handle.
duke@435:   static void     complete_create_array_klass(arrayKlassHandle k, KlassHandle super_klass, TRAPS);
duke@435: 
bobv@2036:   // jvm support
bobv@2036:   jint compute_modifier_flags(TRAPS) const;
duke@435: 
bobv@2036:   // JVMTI support
bobv@2036:   jint jvmti_class_status() const;
duke@435: 
duke@435:   // Printing
duke@435:   void oop_print_on(oop obj, outputStream* st);
bobv@2036: 
duke@435:   // Verification
duke@435:   void oop_verify_on(oop obj, outputStream* st);
duke@435: };