| /* |
| * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| // arrayKlass is the abstract baseclass for all array classes |
| |
| class arrayKlass: public Klass { |
| friend class VMStructs; |
| private: |
| int _dimension; // This is n'th-dimensional array. |
| klassOop _higher_dimension; // Refers the (n+1)'th-dimensional array (if present). |
| klassOop _lower_dimension; // Refers the (n-1)'th-dimensional array (if present). |
| int _vtable_len; // size of vtable for this klass |
| juint _alloc_size; // allocation profiling support |
| oop _component_mirror; // component type, as a java/lang/Class |
| |
| public: |
| // Testing operation |
| bool oop_is_array() const { return true; } |
| |
| // Instance variables |
| int dimension() const { return _dimension; } |
| void set_dimension(int dimension) { _dimension = dimension; } |
| |
| klassOop higher_dimension() const { return _higher_dimension; } |
| void set_higher_dimension(klassOop k) { oop_store_without_check((oop*) &_higher_dimension, (oop) k); } |
| oop* adr_higher_dimension() { return (oop*)&this->_higher_dimension;} |
| |
| klassOop lower_dimension() const { return _lower_dimension; } |
| void set_lower_dimension(klassOop k) { oop_store_without_check((oop*) &_lower_dimension, (oop) k); } |
| oop* adr_lower_dimension() { return (oop*)&this->_lower_dimension;} |
| |
| // Allocation profiling support |
| juint alloc_size() const { return _alloc_size; } |
| void set_alloc_size(juint n) { _alloc_size = n; } |
| |
| // offset of first element, including any padding for the sake of alignment |
| int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); } |
| int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); } |
| // type of elements (T_OBJECT for both oop arrays and array-arrays) |
| BasicType element_type() const { return layout_helper_element_type(layout_helper()); } |
| |
| oop component_mirror() const { return _component_mirror; } |
| void set_component_mirror(oop m) { oop_store((oop*) &_component_mirror, m); } |
| oop* adr_component_mirror() { return (oop*)&this->_component_mirror;} |
| |
| // Compiler/Interpreter offset |
| static ByteSize component_mirror_offset() { return byte_offset_of(arrayKlass, _component_mirror); } |
| |
| virtual klassOop java_super() const;//{ return SystemDictionary::object_klass(); } |
| |
| // Allocation |
| // Sizes points to the first dimension of the array, subsequent dimensions |
| // are always in higher memory. The callers of these set that up. |
| virtual oop multi_allocate(int rank, jint* sizes, TRAPS); |
| objArrayOop allocate_arrayArray(int n, int length, TRAPS); |
| |
| // Lookup operations |
| methodOop uncached_lookup_method(symbolOop name, symbolOop signature) const; |
| |
| // Casting from klassOop |
| static arrayKlass* cast(klassOop k) { |
| Klass* kp = k->klass_part(); |
| assert(kp->null_vtbl() || kp->oop_is_array(), "cast to arrayKlass"); |
| return (arrayKlass*) kp; |
| } |
| |
| objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS); |
| bool compute_is_subtype_of(klassOop k); |
| |
| // Sizing |
| static int header_size() { return oopDesc::header_size() + sizeof(arrayKlass)/HeapWordSize; } |
| int object_size(int header_size) const; |
| |
| bool object_is_parsable() const { return _vtable_len > 0; } |
| |
| // Java vtable |
| klassVtable* vtable() const; // return new klassVtable |
| int vtable_length() const { return _vtable_len; } |
| static int base_vtable_length() { return Universe::base_vtable_size(); } |
| void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; } |
| protected: |
| inline intptr_t* start_of_vtable() const; |
| |
| public: |
| // Iterators |
| void array_klasses_do(void f(klassOop k)); |
| void with_array_klasses_do(void f(klassOop k)); |
| |
| // Shared creation method |
| static arrayKlassHandle base_create_array_klass( |
| const Klass_vtbl& vtbl, |
| int header_size, KlassHandle klass, |
| TRAPS); |
| // Return a handle. |
| static void complete_create_array_klass(arrayKlassHandle k, KlassHandle super_klass, TRAPS); |
| |
| public: |
| // jvm support |
| jint compute_modifier_flags(TRAPS) const; |
| |
| public: |
| // JVMTI support |
| jint jvmti_class_status() const; |
| |
| #ifndef PRODUCT |
| public: |
| // Printing |
| void oop_print_on(oop obj, outputStream* st); |
| #endif |
| public: |
| // Verification |
| void oop_verify_on(oop obj, outputStream* st); |
| }; |