1 /* 2 * Copyright (c) 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_VALUEARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_VALUEARRAYKLASS_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "oops/arrayKlass.hpp" 30 #include "oops/valueKlass.hpp" 31 #include "utilities/macros.hpp" 32 33 /** 34 * Array of values, gives a layout of typeArrayOop, but needs oops iterators 35 */ 36 class ValueArrayKlass : public ArrayKlass { 37 friend class VMStructs; 38 private: 39 int _element_value_store_size; // pow2 addressing, limit value store copy size 40 ValueKlass* _element_klass; // The klass of the elements of this array type 41 42 // Constructor 43 ValueArrayKlass(KlassHandle element_klass, Symbol* name); 44 void set_element_klass(ValueKlass* k); 45 46 static ValueArrayKlass* allocate_klass(KlassHandle element_klass, Symbol* name, TRAPS); 47 protected: 48 // Returns the ArrayKlass for n'th dimension. 49 Klass* array_klass_impl(bool or_null, int n, TRAPS); 50 51 // Returns the array class with this class as element type. 52 Klass* array_klass_impl(bool or_null, TRAPS); 53 54 public: 55 56 ValueArrayKlass() {} 57 58 // Casting from Klass* 59 static ValueArrayKlass* cast(Klass* k) { 60 assert(k->is_valueArray_klass(), "cast to ValueArrayKlass"); 61 return (ValueArrayKlass*) k; 62 } 63 64 // klass allocation 65 static ValueArrayKlass* allocate_klass(KlassHandle element_klass, TRAPS); 66 67 void initialize(TRAPS); 68 69 // Instance variables 70 ValueKlass* element_klass() const { return _element_klass; } 71 ValueKlass** element_klass_addr() { return &_element_klass; } 72 73 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); } 74 int element_value_store_size() const { return _element_value_store_size; } 75 76 bool is_valueArray_klass_slow() const { return true; } 77 78 bool contains_oops() { return element_klass()->contains_oops(); } 79 bool is_atomic() { return element_klass()->is_atomic(); } 80 81 oop protection_domain() const; 82 83 static jint array_layout_helper(ValueKlass* vklass); // layout helper for values 84 85 // sizing 86 static int header_size() { return sizeof(ValueArrayKlass)/HeapWordSize; } 87 int size() const { return ArrayKlass::static_size(header_size()); } 88 89 jint max_elements() const; 90 91 int oop_size(oop obj) const; 92 93 // Oop Allocation 94 oop allocate(int length, bool do_zero, TRAPS); 95 oop multi_allocate(int rank, jint* sizes, TRAPS); 96 97 // Naming 98 const char* internal_name() const { return external_name(); } 99 100 // Copying 101 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 102 103 // Compiler/Interpreter offset 104 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ValueArrayKlass, _element_klass)); } 105 106 // GC specific object visitors 107 // 108 // Mark Sweep 109 int oop_ms_adjust_pointers(oop obj); 110 111 #if INCLUDE_ALL_GCS 112 // Parallel Scavenge 113 void oop_ps_push_contents( oop obj, PSPromotionManager* pm); 114 // Parallel Compact 115 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); 116 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); 117 #endif 118 119 CMH("Oop iterators. Don't have embedded oops yet, so CMH...") 120 121 private: 122 template <bool nv, typename OopClosureType> 123 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 124 template <bool nv, typename OopClosureType> 125 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 126 127 template <bool nv, typename T, class OopClosureType> 128 inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure); 129 130 template <bool nv, class OopClosureType> 131 inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr); 132 133 template <bool nv, typename T, class OopClosureType> 134 inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high); 135 136 public: 137 template <bool nv, class OopClosureType> 138 inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure); 139 140 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL) 141 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL) 142 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE) 143 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE) 144 145 #if INCLUDE_ALL_GCS 146 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 147 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 148 #endif // INCLUDE_ALL_GCS 149 150 public: 151 // Printing 152 void print_on(outputStream* st) const; 153 void print_value_on(outputStream* st) const; 154 155 void oop_print_value_on(oop obj, outputStream* st); 156 #ifndef PRODUCT 157 void oop_print_on(oop obj, outputStream* st); 158 #endif 159 160 // Verification 161 void verify_on(outputStream* st); 162 void oop_verify_on(oop obj, outputStream* st); 163 }; 164 165 #endif 166