1 /* 2 * Copyright (c) 1997, 2025, 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 * 23 */ 24 25 #ifndef SHARE_OOPS_TYPEARRAYKLASS_HPP 26 #define SHARE_OOPS_TYPEARRAYKLASS_HPP 27 28 #include "oops/arrayKlass.hpp" 29 30 class ClassLoaderData; 31 32 // A TypeArrayKlass is the klass of a typeArray 33 // It contains the type and size of the elements 34 35 class TypeArrayKlass : public ArrayKlass { 36 friend class VMStructs; 37 38 public: 39 static const KlassKind Kind = TypeArrayKlassKind; 40 41 private: 42 jint _max_length; // maximum number of elements allowed in an array 43 44 // Constructor 45 TypeArrayKlass(BasicType type, Symbol* name); 46 static TypeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS); 47 public: 48 TypeArrayKlass() {} // For dummy objects. 49 50 // instance variables 51 jint max_length() { return _max_length; } 52 void set_max_length(jint m) { _max_length = m; } 53 54 // testers 55 DEBUG_ONLY(bool is_typeArray_klass_slow() const { return true; }) 56 57 // klass allocation 58 static TypeArrayKlass* create_klass(BasicType type, const char* name_str, 59 TRAPS); 60 static TypeArrayKlass* create_klass(BasicType type, TRAPS) { 61 return create_klass(type, external_name(type), THREAD); 62 } 63 64 size_t oop_size(oop obj, markWord mark) const; 65 66 // Allocation 67 typeArrayOop allocate_common(int length, bool do_zero, TRAPS); 68 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } 69 oop multi_allocate(int rank, jint* sizes, TRAPS); 70 71 oop protection_domain() const { return nullptr; } 72 73 // Copying 74 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 75 76 u2 compute_modifier_flags() const; 77 78 // Oop iterators. Since there are no oops in TypeArrayKlasses, 79 // these functions only return the size of the object. 80 81 private: 82 // The implementation used by all oop_oop_iterate functions in TypeArrayKlasses. 83 inline void oop_oop_iterate_impl(oop obj, OopIterateClosure* closure); 84 85 public: 86 // Wraps oop_oop_iterate_impl to conform to macros. 87 template <typename T, typename OopClosureType> 88 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 89 90 // Wraps oop_oop_iterate_impl to conform to macros. 91 template <typename T, typename OopClosureType> 92 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 93 94 // Wraps oop_oop_iterate_impl to conform to macros. 95 template <typename T, typename OopClosureType> 96 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure); 97 98 public: 99 static TypeArrayKlass* cast(Klass* k) { 100 return const_cast<TypeArrayKlass*>(cast(const_cast<const Klass*>(k))); 101 } 102 103 static const TypeArrayKlass* cast(const Klass* k) { 104 assert(k->is_typeArray_klass(), "cast to TypeArrayKlass"); 105 return static_cast<const TypeArrayKlass*>(k); 106 } 107 108 // Naming 109 static const char* external_name(BasicType type); 110 111 // Sizing 112 static int header_size() { return sizeof(TypeArrayKlass)/wordSize; } 113 int size() const { return ArrayKlass::static_size(header_size()); } 114 115 // Initialization (virtual from Klass) 116 void initialize(TRAPS); 117 118 public: 119 // Printing 120 void oop_print_on(oop obj, outputStream* st); 121 void oop_print_elements_on(typeArrayOop ta, outputStream* st); 122 void print_on(outputStream* st) const; 123 void print_value_on(outputStream* st) const; 124 125 public: 126 const char* internal_name() const; 127 128 ModuleEntry* module() const; 129 PackageEntry* package() const; 130 }; 131 132 #endif // SHARE_OOPS_TYPEARRAYKLASS_HPP