1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/oops/arrayKlass.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,158 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OOPS_ARRAYKLASS_HPP
1.29 +#define SHARE_VM_OOPS_ARRAYKLASS_HPP
1.30 +
1.31 +#include "memory/universe.hpp"
1.32 +#include "oops/klass.hpp"
1.33 +
1.34 +class fieldDescriptor;
1.35 +class klassVtable;
1.36 +
1.37 +// ArrayKlass is the abstract baseclass for all array classes
1.38 +
1.39 +class ArrayKlass: public Klass {
1.40 + friend class VMStructs;
1.41 + private:
1.42 + int _dimension; // This is n'th-dimensional array.
1.43 + Klass* volatile _higher_dimension; // Refers the (n+1)'th-dimensional array (if present).
1.44 + Klass* volatile _lower_dimension; // Refers the (n-1)'th-dimensional array (if present).
1.45 + int _vtable_len; // size of vtable for this klass
1.46 + oop _component_mirror; // component type, as a java/lang/Class
1.47 +
1.48 + protected:
1.49 + // Constructors
1.50 + // The constructor with the Symbol argument does the real array
1.51 + // initialization, the other is a dummy
1.52 + ArrayKlass(Symbol* name);
1.53 + ArrayKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for cds"); }
1.54 +
1.55 + public:
1.56 + // Testing operation
1.57 + bool oop_is_array_slow() const { return true; }
1.58 +
1.59 + // Instance variables
1.60 + int dimension() const { return _dimension; }
1.61 + void set_dimension(int dimension) { _dimension = dimension; }
1.62 +
1.63 + Klass* higher_dimension() const { return _higher_dimension; }
1.64 + void set_higher_dimension(Klass* k) { _higher_dimension = k; }
1.65 + Klass** adr_higher_dimension() { return (Klass**)&this->_higher_dimension;}
1.66 +
1.67 + Klass* lower_dimension() const { return _lower_dimension; }
1.68 + void set_lower_dimension(Klass* k) { _lower_dimension = k; }
1.69 + Klass** adr_lower_dimension() { return (Klass**)&this->_lower_dimension;}
1.70 +
1.71 + // offset of first element, including any padding for the sake of alignment
1.72 + int array_header_in_bytes() const { return layout_helper_header_size(layout_helper()); }
1.73 + int log2_element_size() const { return layout_helper_log2_element_size(layout_helper()); }
1.74 + // type of elements (T_OBJECT for both oop arrays and array-arrays)
1.75 + BasicType element_type() const { return layout_helper_element_type(layout_helper()); }
1.76 +
1.77 + oop component_mirror() const { return _component_mirror; }
1.78 + void set_component_mirror(oop m) { klass_oop_store(&_component_mirror, m); }
1.79 + oop* adr_component_mirror() { return (oop*)&this->_component_mirror;}
1.80 +
1.81 + // Compiler/Interpreter offset
1.82 + static ByteSize component_mirror_offset() { return in_ByteSize(offset_of(ArrayKlass, _component_mirror)); }
1.83 +
1.84 + virtual Klass* java_super() const;//{ return SystemDictionary::Object_klass(); }
1.85 +
1.86 + // Allocation
1.87 + // Sizes points to the first dimension of the array, subsequent dimensions
1.88 + // are always in higher memory. The callers of these set that up.
1.89 + virtual oop multi_allocate(int rank, jint* sizes, TRAPS);
1.90 + objArrayOop allocate_arrayArray(int n, int length, TRAPS);
1.91 +
1.92 + // find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
1.93 + Klass* find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
1.94 +
1.95 + // Lookup operations
1.96 + Method* uncached_lookup_method(Symbol* name, Symbol* signature, MethodLookupMode mode) const;
1.97 +
1.98 + // Casting from Klass*
1.99 + static ArrayKlass* cast(Klass* k) {
1.100 + assert(k->oop_is_array(), "cast to ArrayKlass");
1.101 + return (ArrayKlass*) k;
1.102 + }
1.103 +
1.104 + GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
1.105 + bool compute_is_subtype_of(Klass* k);
1.106 +
1.107 + // Sizing
1.108 + static int header_size() { return sizeof(ArrayKlass)/HeapWordSize; }
1.109 + static int static_size(int header_size);
1.110 +
1.111 +#if INCLUDE_SERVICES
1.112 + virtual void collect_statistics(KlassSizeStats *sz) const {
1.113 + Klass::collect_statistics(sz);
1.114 + // Do nothing for now, but remember to modify if you add new
1.115 + // stuff to ArrayKlass.
1.116 + }
1.117 +#endif
1.118 +
1.119 + // Java vtable
1.120 + klassVtable* vtable() const; // return new klassVtable
1.121 + int vtable_length() const { return _vtable_len; }
1.122 + static int base_vtable_length() { return Universe::base_vtable_size(); }
1.123 + void set_vtable_length(int len) { assert(len == base_vtable_length(), "bad length"); _vtable_len = len; }
1.124 + protected:
1.125 + inline intptr_t* start_of_vtable() const;
1.126 +
1.127 + public:
1.128 + // Iterators
1.129 + void array_klasses_do(void f(Klass* k));
1.130 + void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
1.131 +
1.132 + // GC support
1.133 + virtual void oops_do(OopClosure* cl);
1.134 +
1.135 + // Return a handle.
1.136 + static void complete_create_array_klass(ArrayKlass* k, KlassHandle super_klass, TRAPS);
1.137 +
1.138 +
1.139 + // jvm support
1.140 + jint compute_modifier_flags(TRAPS) const;
1.141 +
1.142 + // JVMTI support
1.143 + jint jvmti_class_status() const;
1.144 +
1.145 + // CDS support - remove and restore oops from metadata. Oops are not shared.
1.146 + virtual void remove_unshareable_info();
1.147 + virtual void restore_unshareable_info(TRAPS);
1.148 +
1.149 + // Printing
1.150 + void print_on(outputStream* st) const;
1.151 + void print_value_on(outputStream* st) const;
1.152 +
1.153 + void oop_print_on(oop obj, outputStream* st);
1.154 +
1.155 + // Verification
1.156 + void verify_on(outputStream* st);
1.157 +
1.158 + void oop_verify_on(oop obj, outputStream* st);
1.159 +};
1.160 +
1.161 +#endif // SHARE_VM_OOPS_ARRAYKLASS_HPP
