1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/arrayKlass.hpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,134 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +// arrayKlass is the abstract baseclass for all array classes
1.29 +
1.30 +class arrayKlass: public Klass {
1.31 + friend class VMStructs;
1.32 + private:
1.33 + int _dimension; // This is n'th-dimensional array.
1.34 + klassOop _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
1.35 + klassOop _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
1.36 + int _vtable_len; // size of vtable for this klass
1.37 + juint _alloc_size; // allocation profiling support
1.38 + oop _component_mirror; // component type, as a java/lang/Class
1.39 +
1.40 + public:
1.41 + // Testing operation
1.42 + bool oop_is_array() const { return true; }
1.43 +
1.44 + // Instance variables
1.45 + int dimension() const { return _dimension; }
1.46 + void set_dimension(int dimension) { _dimension = dimension; }
1.47 +
1.48 + klassOop higher_dimension() const { return _higher_dimension; }
1.49 + void set_higher_dimension(klassOop k) { oop_store_without_check((oop*) &_higher_dimension, (oop) k); }
1.50 + oop* adr_higher_dimension() { return (oop*)&this->_higher_dimension;}
1.51 +
1.52 + klassOop lower_dimension() const { return _lower_dimension; }
1.53 + void set_lower_dimension(klassOop k) { oop_store_without_check((oop*) &_lower_dimension, (oop) k); }
1.54 + oop* adr_lower_dimension() { return (oop*)&this->_lower_dimension;}
1.55 +
1.56 + // Allocation profiling support
1.57 + juint alloc_size() const { return _alloc_size; }
1.58 + void set_alloc_size(juint n) { _alloc_size = n; }
1.59 +
1.60 + // offset of first element, including any padding for the sake of alignment
1.61 + int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); }
1.62 + int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); }
1.63 + // type of elements (T_OBJECT for both oop arrays and array-arrays)
1.64 + BasicType element_type() const { return layout_helper_element_type(layout_helper()); }
1.65 +
1.66 + oop component_mirror() const { return _component_mirror; }
1.67 + void set_component_mirror(oop m) { oop_store((oop*) &_component_mirror, m); }
1.68 + oop* adr_component_mirror() { return (oop*)&this->_component_mirror;}
1.69 +
1.70 + // Compiler/Interpreter offset
1.71 + static ByteSize component_mirror_offset() { return byte_offset_of(arrayKlass, _component_mirror); }
1.72 +
1.73 + virtual klassOop java_super() const;//{ return SystemDictionary::object_klass(); }
1.74 +
1.75 + // Allocation
1.76 + // Sizes points to the first dimension of the array, subsequent dimensions
1.77 + // are always in higher memory. The callers of these set that up.
1.78 + virtual oop multi_allocate(int rank, jint* sizes, TRAPS);
1.79 + objArrayOop allocate_arrayArray(int n, int length, TRAPS);
1.80 +
1.81 + // Lookup operations
1.82 + methodOop uncached_lookup_method(symbolOop name, symbolOop signature) const;
1.83 +
1.84 + // Casting from klassOop
1.85 + static arrayKlass* cast(klassOop k) {
1.86 + Klass* kp = k->klass_part();
1.87 + assert(kp->null_vtbl() || kp->oop_is_array(), "cast to arrayKlass");
1.88 + return (arrayKlass*) kp;
1.89 + }
1.90 +
1.91 + objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
1.92 + bool compute_is_subtype_of(klassOop k);
1.93 +
1.94 + // Sizing
1.95 + static int header_size() { return oopDesc::header_size() + sizeof(arrayKlass)/HeapWordSize; }
1.96 + int object_size(int header_size) const;
1.97 +
1.98 + bool object_is_parsable() const { return _vtable_len > 0; }
1.99 +
1.100 + // Java vtable
1.101 + klassVtable* vtable() const; // return new klassVtable
1.102 + int vtable_length() const { return _vtable_len; }
1.103 + static int base_vtable_length() { return Universe::base_vtable_size(); }
1.104 + void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }
1.105 + protected:
1.106 + inline intptr_t* start_of_vtable() const;
1.107 +
1.108 + public:
1.109 + // Iterators
1.110 + void array_klasses_do(void f(klassOop k));
1.111 + void with_array_klasses_do(void f(klassOop k));
1.112 +
1.113 + // Shared creation method
1.114 + static arrayKlassHandle base_create_array_klass(
1.115 + const Klass_vtbl& vtbl,
1.116 + int header_size, KlassHandle klass,
1.117 + TRAPS);
1.118 + // Return a handle.
1.119 + static void complete_create_array_klass(arrayKlassHandle k, KlassHandle super_klass, TRAPS);
1.120 +
1.121 + public:
1.122 + // jvm support
1.123 + jint compute_modifier_flags(TRAPS) const;
1.124 +
1.125 + public:
1.126 + // JVMTI support
1.127 + jint jvmti_class_status() const;
1.128 +
1.129 +#ifndef PRODUCT
1.130 + public:
1.131 + // Printing
1.132 + void oop_print_on(oop obj, outputStream* st);
1.133 +#endif
1.134 + public:
1.135 + // Verification
1.136 + void oop_verify_on(oop obj, outputStream* st);
1.137 +};
