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 39 public: 40 static const KlassID ID = ValueArrayKlassID; 41 42 private: 43 // Constructor 44 ValueArrayKlass(Klass* element_klass, Symbol* name); 45 46 static ValueArrayKlass* allocate_klass(Klass* element_klass, TRAPS); 47 protected: 48 // Returns the ArrayKlass for n'th dimension. 49 Klass* array_klass_impl(ArrayStorageProperties storage_props, bool or_null, int n, TRAPS); 50 51 // Returns the array class with this class as element type. 52 Klass* array_klass_impl(ArrayStorageProperties storage_props, bool or_null, TRAPS); 53 54 public: 55 56 ValueArrayKlass() {} 57 58 // Properties of an LWorld (LW2) flattened array 59 ArrayStorageProperties storage_properties() { return ArrayStorageProperties::flattened_and_null_free; } 60 61 virtual ValueKlass* element_klass() const; 62 virtual void set_element_klass(Klass* k); 63 64 // Casting from Klass* 65 static ValueArrayKlass* cast(Klass* k) { 66 assert(k->is_valueArray_klass(), "cast to ValueArrayKlass"); 67 return (ValueArrayKlass*) k; 68 } 69 70 // klass allocation 71 static ValueArrayKlass* allocate_klass(ArrayStorageProperties storage_props, Klass* element_klass, TRAPS); 72 73 void initialize(TRAPS); 74 75 ModuleEntry* module() const; 76 PackageEntry* package() const; 77 78 bool can_be_primary_super_slow() const; 79 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots, 80 Array<InstanceKlass*>* transitive_interfaces); 81 82 int element_byte_size() const { return 1 << layout_helper_log2_element_size(_layout_helper); } 83 84 bool is_valueArray_klass_slow() const { return true; } 85 86 bool contains_oops() { 87 return element_klass()->contains_oops(); 88 } 89 90 bool is_atomic() { 91 return element_klass()->is_atomic(); 92 } 93 94 oop protection_domain() const; 95 96 static jint array_layout_helper(ValueKlass* vklass); // layout helper for values 97 98 // sizing 99 static int header_size() { return sizeof(ValueArrayKlass)/HeapWordSize; } 100 int size() const { return ArrayKlass::static_size(header_size()); } 101 102 jint max_elements() const; 103 104 int oop_size(oop obj) const; 105 106 // Oop Allocation 107 valueArrayOop allocate(int length, TRAPS); 108 oop multi_allocate(int rank, jint* sizes, TRAPS); 109 110 // Naming 111 const char* internal_name() const { return external_name(); } 112 113 // Copying 114 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 115 116 // GC specific object visitors 117 // 118 // Mark Sweep 119 int oop_ms_adjust_pointers(oop obj); 120 121 122 template <typename T, typename OopClosureType> 123 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 124 125 template <typename T, typename OopClosureType> 126 inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure); 127 128 template <typename T, typename OopClosureType> 129 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 130 131 template <typename T, class OopClosureType> 132 inline void oop_oop_iterate_elements(valueArrayOop a, OopClosureType* closure); 133 134 private: 135 template <typename T, class OopClosureType> 136 inline void oop_oop_iterate_elements_specialized(valueArrayOop a, OopClosureType* closure); 137 138 template <typename T, class OopClosureType> 139 inline void oop_oop_iterate_elements_bounded(valueArrayOop a, OopClosureType* closure, MemRegion mr); 140 141 template <typename T, class OopClosureType> 142 inline void oop_oop_iterate_elements_specialized_bounded(valueArrayOop a, OopClosureType* closure, void* low, void* high); 143 144 public: 145 // Printing 146 void print_on(outputStream* st) const; 147 void print_value_on(outputStream* st) const; 148 149 void oop_print_value_on(oop obj, outputStream* st); 150 #ifndef PRODUCT 151 void oop_print_on(oop obj, outputStream* st); 152 #endif 153 154 // Verification 155 void verify_on(outputStream* st); 156 void oop_verify_on(oop obj, outputStream* st); 157 }; 158 159 #endif 160