objArrayKlass.hpp revision 13370:731370f39fcd
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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 "oops/arrayKlass.hpp" 30#include "utilities/macros.hpp" 31 32// ObjArrayKlass is the klass for objArrays 33 34class ObjArrayKlass : public ArrayKlass { 35 friend class VMStructs; 36 friend class JVMCIVMStructs; 37 private: 38 // If you add a new field that points to any metaspace object, you 39 // must add this field to ObjArrayKlass::metaspace_pointers_do(). 40 Klass* _element_klass; // The klass of the elements of this array type 41 Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass) 42 43 // Constructor 44 ObjArrayKlass(int n, Klass* element_klass, Symbol* name); 45 static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS); 46 public: 47 // For dummy objects 48 ObjArrayKlass() {} 49 50 // Instance variables 51 Klass* element_klass() const { return _element_klass; } 52 void set_element_klass(Klass* k) { _element_klass = k; } 53 Klass** element_klass_addr() { return &_element_klass; } 54 55 Klass* bottom_klass() const { return _bottom_klass; } 56 void set_bottom_klass(Klass* k) { _bottom_klass = k; } 57 Klass** bottom_klass_addr() { return &_bottom_klass; } 58 59 ModuleEntry* module() const; 60 PackageEntry* package() const; 61 62 // Compiler/Interpreter offset 63 static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); } 64 65 // Dispatched operation 66 bool can_be_primary_super_slow() const; 67 GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); 68 bool compute_is_subtype_of(Klass* k); 69 DEBUG_ONLY(bool is_objArray_klass_slow() const { return true; }) 70 int oop_size(oop obj) const; 71 72 // Allocation 73 static Klass* allocate_objArray_klass(ClassLoaderData* loader_data, 74 int n, Klass* element_klass, TRAPS); 75 76 objArrayOop allocate(int length, TRAPS); 77 oop multi_allocate(int rank, jint* sizes, TRAPS); 78 79 // Copying 80 void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); 81 82 // Compute protection domain 83 oop protection_domain() const { return bottom_klass()->protection_domain(); } 84 85 virtual void metaspace_pointers_do(MetaspaceClosure* iter); 86 87 private: 88 // Either oop or narrowOop depending on UseCompressedOops. 89 // must be called from within ObjArrayKlass.cpp 90 template <class T> void do_copy(arrayOop s, T* src, arrayOop d, 91 T* dst, int length, TRAPS); 92 protected: 93 // Returns the ObjArrayKlass for n'th dimension. 94 virtual Klass* array_klass_impl(bool or_null, int n, TRAPS); 95 96 // Returns the array class with this class as element type. 97 virtual Klass* array_klass_impl(bool or_null, TRAPS); 98 99 public: 100 101 static ObjArrayKlass* cast(Klass* k) { 102 return const_cast<ObjArrayKlass*>(cast(const_cast<const Klass*>(k))); 103 } 104 105 static const ObjArrayKlass* cast(const Klass* k) { 106 assert(k->is_objArray_klass(), "cast to ObjArrayKlass"); 107 return static_cast<const ObjArrayKlass*>(k); 108 } 109 110 // Sizing 111 static int header_size() { return sizeof(ObjArrayKlass)/wordSize; } 112 int size() const { return ArrayKlass::static_size(header_size()); } 113 114 // Initialization (virtual from Klass) 115 void initialize(TRAPS); 116 117 // GC specific object visitors 118 // 119#if INCLUDE_ALL_GCS 120 // Parallel Scavenge 121 void oop_ps_push_contents( oop obj, PSPromotionManager* pm); 122 // Parallel Compact 123 void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); 124 void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); 125#endif 126 127 // Oop fields (and metadata) iterators 128 // [nv = true] Use non-virtual calls to do_oop_nv. 129 // [nv = false] Use virtual calls to do_oop. 130 // 131 // The ObjArrayKlass iterators also visits the Object's klass. 132 133 private: 134 135 // Iterate over oop elements and metadata. 136 template <bool nv, typename OopClosureType> 137 inline void oop_oop_iterate(oop obj, OopClosureType* closure); 138 139 // Iterate over oop elements within mr, and metadata. 140 template <bool nv, typename OopClosureType> 141 inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); 142 143 // Iterate over oop elements with indices within [start, end), and metadata. 144 template <bool nv, class OopClosureType> 145 inline void oop_oop_iterate_range(oop obj, OopClosureType* closure, int start, int end); 146 147 // Iterate over oop elements within [start, end), and metadata. 148 // Specialized for [T = oop] or [T = narrowOop]. 149 template <bool nv, typename T, class OopClosureType> 150 inline void oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end); 151 152 public: 153 // Iterate over all oop elements. 154 template <bool nv, class OopClosureType> 155 inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure); 156 157 private: 158 // Iterate over all oop elements. 159 // Specialized for [T = oop] or [T = narrowOop]. 160 template <bool nv, typename T, class OopClosureType> 161 inline void oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure); 162 163 // Iterate over all oop elements with indices within mr. 164 template <bool nv, class OopClosureType> 165 inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr); 166 167 // Iterate over oop elements within [low, high).. 168 // Specialized for [T = oop] or [T = narrowOop]. 169 template <bool nv, typename T, class OopClosureType> 170 inline void oop_oop_iterate_elements_specialized_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high); 171 172 173 public: 174 175 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL) 176 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL) 177 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE) 178 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE) 179 180#if INCLUDE_ALL_GCS 181 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 182 ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) 183#endif // INCLUDE_ALL_GCS 184 185 // JVM support 186 jint compute_modifier_flags(TRAPS) const; 187 188 public: 189 // Printing 190 void print_on(outputStream* st) const; 191 void print_value_on(outputStream* st) const; 192 193 void oop_print_value_on(oop obj, outputStream* st); 194#ifndef PRODUCT 195 void oop_print_on (oop obj, outputStream* st); 196#endif //PRODUCT 197 198 const char* internal_name() const; 199 200 // Verification 201 void verify_on(outputStream* st); 202 203 void oop_verify_on(oop obj, outputStream* st); 204}; 205 206#endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP 207