1 /* 2 * Copyright (c) 1997, 2017, 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_VM_OOPS_TYPEARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_TYPEARRAYKLASS_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "oops/arrayKlass.hpp" 30 31 // A TypeArrayKlass is the klass of a typeArray 32 // It contains the type and size of the elements 33 34 class TypeArrayKlass : public ArrayKlass { 35 friend class VMStructs; 36 private: 37 jint _max_length; // maximum number of elements allowed in an array 38 39 // Constructor 40 TypeArrayKlass(BasicType type, Symbol* name); 41 static TypeArrayKlass* allocate(ClassLoaderData* loader_data, BasicType type, Symbol* name, TRAPS); 42 public: 43 TypeArrayKlass() {} // For dummy objects. 44 45 // instance variables 46 jint max_length() { return _max_length; } 47 void set_max_length(jint m) { _max_length = m; } 48 49 // testers 50 DEBUG_ONLY(bool is_typeArray_klass_slow() const { return true; }) 51 52 // klass allocation 53 static TypeArrayKlass* create_klass(BasicType type, const char* name_str, 54 TRAPS); 55 static inline Klass* create_klass(BasicType type, int scale, TRAPS) { 56 TypeArrayKlass* tak = create_klass(type, external_name(type), CHECK_NULL); 57 assert(scale == (1 << tak->log2_element_size()), "scale must check out"); 58 return tak; 59 } 60 61 int oop_size(oop obj) const; 62 63 bool compute_is_subtype_of(Klass* k); 64 65 // Allocation 66 typeArrayOop allocate_common(int length, bool do_zero, TRAPS); 67 typeArrayOop allocate(int length, TRAPS) { return allocate_common(length, true, THREAD); } 68 oop multi_allocate(int rank, jint* sizes, TRAPS); 69 70 oop protection_domain() const { return NULL; } 71 72 // Copying 73 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 74 75 // GC specific object visitors 76 // 77 #if INCLUDE_PARALLELGC 78 // Parallel Scavenge 79 void oop_ps_push_contents( oop obj, PSPromotionManager* pm); 80 // Parallel Compact 81 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); 82 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); 83 #endif 84 85 // Oop iterators. Since there are no oops in TypeArrayKlasses, 86 // these functions only return the size of the object. 87 88 private: 89 // The implementation used by all oop_oop_iterate functions in TypeArrayKlasses. 90 inline void oop_oop_iterate_impl(oop obj, ExtendedOopClosure* closure); 91 92 // Wraps oop_oop_iterate_impl to conform to macros. 93 template <bool nv, typename OopClosureType> 94 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 95 96 // Wraps oop_oop_iterate_impl to conform to macros. 97 template <bool nv, typename OopClosureType> 98 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 99 100 public: 101 102 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL) 103 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL) 104 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE) 105 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE) 106 107 #if INCLUDE_OOP_OOP_ITERATE_BACKWARDS 108 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 109 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 110 #endif 111 112 113 protected: 114 // Find n'th dimensional array 115 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS); 116 117 // Returns the array class with this class as element type 118 virtual Klass* array_klass_impl(bool or_null, TRAPS); 119 120 public: 121 static TypeArrayKlass* cast(Klass* k) { 122 return const_cast<TypeArrayKlass*>(cast(const_cast<const Klass*>(k))); 123 } 124 125 static const TypeArrayKlass* cast(const Klass* k) { 126 assert(k->is_typeArray_klass(), "cast to TypeArrayKlass"); 127 return static_cast<const TypeArrayKlass*>(k); 128 } 129 130 // Naming 131 static const char* external_name(BasicType type); 132 133 // Sizing 134 static int header_size() { return sizeof(TypeArrayKlass)/wordSize; } 135 int size() const { return ArrayKlass::static_size(header_size()); } 136 137 // Initialization (virtual from Klass) 138 void initialize(TRAPS); 139 140 public: 141 // Printing 142 #ifndef PRODUCT 143 void oop_print_on(oop obj, outputStream* st); 144 #endif 145 146 void print_on(outputStream* st) const; 147 void print_value_on(outputStream* st) const; 148 149 public: 150 const char* internal_name() const; 151 152 ModuleEntry* module() const; 153 PackageEntry* package() const; 154 }; 155 156 #endif // SHARE_VM_OOPS_TYPEARRAYKLASS_HPP