1 /* 2 * Copyright (c) 1997, 2021, 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 KlassID ID = TypeArrayKlassID; 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: TypeArrayKlass()48 TypeArrayKlass() {} // For dummy objects. 49 50 // instance variables max_length()51 jint max_length() { return _max_length; } set_max_length(jint m)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); create_klass(BasicType type,TRAPS)60 static TypeArrayKlass* create_klass(BasicType type, TRAPS) { 61 return create_klass(type, external_name(type), THREAD); 62 } 63 64 int oop_size(oop obj) const; 65 66 // Allocation 67 typeArrayOop allocate_common(int length, bool do_zero, TRAPS); allocate(int length,TRAPS)68 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } 69 oop multi_allocate(int rank, jint* sizes, TRAPS); 70 protection_domain() const71 oop protection_domain() const { return NULL; } 72 73 // Copying 74 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 75 76 // Oop iterators. Since there are no oops in TypeArrayKlasses, 77 // these functions only return the size of the object. 78 79 private: 80 // The implementation used by all oop_oop_iterate functions in TypeArrayKlasses. 81 inline void oop_oop_iterate_impl(oop obj, OopIterateClosure* closure); 82 83 public: 84 // Wraps oop_oop_iterate_impl to conform to macros. 85 template <typename T, typename OopClosureType> 86 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 87 88 // Wraps oop_oop_iterate_impl to conform to macros. 89 template <typename T, typename OopClosureType> 90 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 91 92 // Wraps oop_oop_iterate_impl to conform to macros. 93 template <typename T, typename OopClosureType> 94 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure); 95 96 public: 97 // Find n'th dimensional array 98 virtual Klass* array_klass(int n, TRAPS); 99 virtual Klass* array_klass_or_null(int n); 100 101 // Returns the array class with this class as element type 102 virtual Klass* array_klass(TRAPS); 103 virtual Klass* array_klass_or_null(); 104 cast(Klass * k)105 static TypeArrayKlass* cast(Klass* k) { 106 return const_cast<TypeArrayKlass*>(cast(const_cast<const Klass*>(k))); 107 } 108 cast(const Klass * k)109 static const TypeArrayKlass* cast(const Klass* k) { 110 assert(k->is_typeArray_klass(), "cast to TypeArrayKlass"); 111 return static_cast<const TypeArrayKlass*>(k); 112 } 113 114 // Naming 115 static const char* external_name(BasicType type); 116 117 // Sizing header_size()118 static int header_size() { return sizeof(TypeArrayKlass)/wordSize; } size() const119 int size() const { return ArrayKlass::static_size(header_size()); } 120 121 // Initialization (virtual from Klass) 122 void initialize(TRAPS); 123 124 public: 125 // Printing 126 #ifndef PRODUCT 127 void oop_print_on(oop obj, outputStream* st); 128 #endif 129 130 void print_on(outputStream* st) const; 131 void print_value_on(outputStream* st) const; 132 133 public: 134 const char* internal_name() const; 135 136 ModuleEntry* module() const; 137 PackageEntry* package() const; 138 }; 139 140 #endif // SHARE_OOPS_TYPEARRAYKLASS_HPP 141