1 /* 2 * Copyright (c) 1997, 2014, 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_OBJARRAYKLASS_HPP 26 #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP 27 28 #include "classfile/classLoaderData.hpp" 29 #include "memory/specialized_oop_closures.hpp" 30 #include "oops/arrayKlass.hpp" 31 #include "utilities/macros.hpp" 32 33 // ObjArrayKlass is the klass for objArrays 34 35 class ObjArrayKlass : public ArrayKlass { 36 friend class VMStructs; 37 private: 38 Klass* _element_klass; // The klass of the elements of this array type 39 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass) 40 41 // Constructor 42 ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name); 43 static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS); 44 public: 45 // For dummy objects ObjArrayKlass()46 ObjArrayKlass() {} 47 48 // Instance variables element_klass() const49 Klass* element_klass() const { return _element_klass; } set_element_klass(Klass * k)50 void set_element_klass(Klass* k) { _element_klass = k; } element_klass_addr()51 Klass** element_klass_addr() { return &_element_klass; } 52 bottom_klass() const53 Klass* bottom_klass() const { return _bottom_klass; } set_bottom_klass(Klass * k)54 void set_bottom_klass(Klass* k) { _bottom_klass = k; } bottom_klass_addr()55 Klass** bottom_klass_addr() { return &_bottom_klass; } 56 57 // Compiler/Interpreter offset element_klass_offset()58 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); } 59 60 // Dispatched operation 61 bool can_be_primary_super_slow() const; 62 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); 63 bool compute_is_subtype_of(Klass* k); oop_is_objArray_slow() const64 bool oop_is_objArray_slow() const { return true; } 65 int oop_size(oop obj) const; 66 67 // Allocation 68 static Klass* allocate_objArray_klass(ClassLoaderData* loader_data, 69 int n, KlassHandle element_klass, TRAPS); 70 71 objArrayOop allocate(int length, TRAPS); 72 oop multi_allocate(int rank, jint* sizes, TRAPS); 73 74 // Copying 75 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 76 77 // Compute protection domain protection_domain() const78 oop protection_domain() const { return bottom_klass()->protection_domain(); } 79 80 private: 81 // Either oop or narrowOop depending on UseCompressedOops. 82 // must be called from within ObjArrayKlass.cpp 83 template <class T> void do_copy(arrayOop s, T* src, arrayOop d, 84 T* dst, int length, TRAPS); 85 protected: 86 // Returns the ObjArrayKlass for n'th dimension. 87 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS); 88 89 // Returns the array class with this class as element type. 90 virtual Klass* array_klass_impl(bool or_null, TRAPS); 91 92 public: 93 // Casting from Klass* cast(Klass * k)94 static ObjArrayKlass* cast(Klass* k) { 95 assert(k->oop_is_objArray(), "cast to ObjArrayKlass"); 96 return (ObjArrayKlass*) k; 97 } 98 99 // Sizing header_size()100 static int header_size() { return sizeof(ObjArrayKlass)/HeapWordSize; } size() const101 int size() const { return ArrayKlass::static_size(header_size()); } 102 103 // Initialization (virtual from Klass) 104 void initialize(TRAPS); 105 106 // Garbage collection 107 void oop_follow_contents(oop obj); 108 inline void oop_follow_contents(oop obj, int index); 109 template <class T> inline void objarray_follow_contents(oop obj, int index); 110 111 int oop_adjust_pointers(oop obj); 112 113 // Parallel Scavenge and Parallel Old 114 PARALLEL_GC_DECLS 115 #if INCLUDE_ALL_GCS 116 inline void oop_follow_contents(ParCompactionManager* cm, oop obj, int index); 117 template <class T> inline void 118 objarray_follow_contents(ParCompactionManager* cm, oop obj, int index); 119 #endif // INCLUDE_ALL_GCS 120 121 // Iterators oop_oop_iterate(oop obj,ExtendedOopClosure * blk)122 int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) { 123 return oop_oop_iterate_v(obj, blk); 124 } oop_oop_iterate_m(oop obj,ExtendedOopClosure * blk,MemRegion mr)125 int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { 126 return oop_oop_iterate_v_m(obj, blk, mr); 127 } 128 #define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ 129 int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \ 130 int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \ 131 MemRegion mr); \ 132 int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk, \ 133 int start, int end); 134 135 ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL) 136 ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL) 137 138 // JVM support 139 jint compute_modifier_flags(TRAPS) const; 140 141 public: 142 // Printing 143 void print_on(outputStream* st) const; 144 void print_value_on(outputStream* st) const; 145 146 void oop_print_value_on(oop obj, outputStream* st); 147 #ifndef PRODUCT 148 void oop_print_on (oop obj, outputStream* st); 149 #endif //PRODUCT 150 151 const char* internal_name() const; 152 153 // Verification 154 void verify_on(outputStream* st); 155 156 void oop_verify_on(oop obj, outputStream* st); 157 }; 158 159 #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP 160