/* * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP #define SHARE_VM_OOPS_OBJARRAYKLASS_HPP #include "classfile/classLoaderData.hpp" #include "oops/arrayKlass.hpp" #include "utilities/macros.hpp" // ObjArrayKlass is the klass for objArrays class ObjArrayKlass : public ArrayKlass { friend class VMStructs; friend class JVMCIVMStructs; private: // If you add a new field that points to any metaspace object, you // must add this field to ObjArrayKlass::metaspace_pointers_do(). Klass* _element_klass; // The klass of the elements of this array type Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass) // Constructor ObjArrayKlass(int n, Klass* element_klass, Symbol* name); static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, Klass* k, Symbol* name, TRAPS); public: // For dummy objects ObjArrayKlass() {} // Instance variables Klass* element_klass() const { return _element_klass; } void set_element_klass(Klass* k) { _element_klass = k; } Klass** element_klass_addr() { return &_element_klass; } Klass* bottom_klass() const { return _bottom_klass; } void set_bottom_klass(Klass* k) { _bottom_klass = k; } Klass** bottom_klass_addr() { return &_bottom_klass; } ModuleEntry* module() const; PackageEntry* package() const; // Compiler/Interpreter offset static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); } // Dispatched operation bool can_be_primary_super_slow() const; GrowableArray* compute_secondary_supers(int num_extra_slots, Array* transitive_interfaces); bool compute_is_subtype_of(Klass* k); DEBUG_ONLY(bool is_objArray_klass_slow() const { return true; }) int oop_size(oop obj) const; // Allocation static Klass* allocate_objArray_klass(ClassLoaderData* loader_data, int n, Klass* element_klass, TRAPS); objArrayOop allocate(int length, TRAPS); oop multi_allocate(int rank, jint* sizes, TRAPS); // Copying void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); // Compute protection domain oop protection_domain() const { return bottom_klass()->protection_domain(); } virtual void metaspace_pointers_do(MetaspaceClosure* iter); private: // Either oop or narrowOop depending on UseCompressedOops. // must be called from within ObjArrayKlass.cpp void do_copy(arrayOop s, size_t src_offset, arrayOop d, size_t dst_offset, int length, TRAPS); protected: // Returns the ObjArrayKlass for n'th dimension. virtual Klass* array_klass_impl(bool or_null, int n, TRAPS); // Returns the array class with this class as element type. virtual Klass* array_klass_impl(bool or_null, TRAPS); public: static ObjArrayKlass* cast(Klass* k) { return const_cast(cast(const_cast(k))); } static const ObjArrayKlass* cast(const Klass* k) { assert(k->is_objArray_klass(), "cast to ObjArrayKlass"); return static_cast(k); } // Sizing static int header_size() { return sizeof(ObjArrayKlass)/wordSize; } int size() const { return ArrayKlass::static_size(header_size()); } // Initialization (virtual from Klass) void initialize(TRAPS); // GC specific object visitors // #if INCLUDE_PARALLELGC // Parallel Scavenge void oop_ps_push_contents( oop obj, PSPromotionManager* pm); // Parallel Compact void oop_pc_follow_contents(oop obj, ParCompactionManager* cm); void oop_pc_update_pointers(oop obj, ParCompactionManager* cm); #endif // Oop fields (and metadata) iterators // [nv = true] Use non-virtual calls to do_oop_nv. // [nv = false] Use virtual calls to do_oop. // // The ObjArrayKlass iterators also visits the Object's klass. private: // Iterate over oop elements and metadata. template inline void oop_oop_iterate(oop obj, OopClosureType* closure); // Iterate over oop elements within mr, and metadata. template inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr); // Iterate over oop elements with indices within [start, end), and metadata. template inline void oop_oop_iterate_range(oop obj, OopClosureType* closure, int start, int end); // Iterate over oop elements within [start, end), and metadata. // Specialized for [T = oop] or [T = narrowOop]. template inline void oop_oop_iterate_range_specialized(objArrayOop a, OopClosureType* closure, int start, int end); public: // Iterate over all oop elements. template inline void oop_oop_iterate_elements(objArrayOop a, OopClosureType* closure); private: // Iterate over all oop elements. // Specialized for [T = oop] or [T = narrowOop]. template inline void oop_oop_iterate_elements_specialized(objArrayOop a, OopClosureType* closure); // Iterate over all oop elements with indices within mr. template inline void oop_oop_iterate_elements_bounded(objArrayOop a, OopClosureType* closure, MemRegion mr); // Iterate over oop elements within [low, high).. // Specialized for [T = oop] or [T = narrowOop]. template inline void oop_oop_iterate_elements_specialized_bounded(objArrayOop a, OopClosureType* closure, void* low, void* high); public: ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL) ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL) ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_RANGE) ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_RANGE) #if INCLUDE_OOP_OOP_ITERATE_BACKWARDS ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_NO_BACKWARDS) #endif // JVM support jint compute_modifier_flags(TRAPS) const; public: // Printing void print_on(outputStream* st) const; void print_value_on(outputStream* st) const; void oop_print_value_on(oop obj, outputStream* st); #ifndef PRODUCT void oop_print_on (oop obj, outputStream* st); #endif //PRODUCT const char* internal_name() const; // Verification void verify_on(outputStream* st); void oop_verify_on(oop obj, outputStream* st); }; #endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP