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src/share/vm/oops/objArrayKlass.hpp@624a0741915c (annotated)

src/share/vm/oops/objArrayKlass.hpp

Thu, 04 Apr 2019 17:56:29 +0800

author

aoqi

date

Thu, 04 Apr 2019 17:56:29 +0800

changeset 9572

624a0741915c

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_OOPS_OBJARRAYKLASS_HPP
aoqi@0	26	#define SHARE_VM_OOPS_OBJARRAYKLASS_HPP
aoqi@0	27
aoqi@0	28	#include "classfile/classLoaderData.hpp"
aoqi@0	29	#include "memory/specialized_oop_closures.hpp"
aoqi@0	30	#include "oops/arrayKlass.hpp"
aoqi@0	31	#include "utilities/macros.hpp"
aoqi@0	32
aoqi@0	33	// ObjArrayKlass is the klass for objArrays
aoqi@0	34
aoqi@0	35	class ObjArrayKlass : public ArrayKlass {
aoqi@0	36	friend class VMStructs;
aoqi@0	37	private:
aoqi@0	38	Klass* _element_klass; // The klass of the elements of this array type
aoqi@0	39	Klass* _bottom_klass; // The one-dimensional type (InstanceKlass or TypeArrayKlass)
aoqi@0	40
aoqi@0	41	// Constructor
aoqi@0	42	ObjArrayKlass(int n, KlassHandle element_klass, Symbol* name);
aoqi@0	43	static ObjArrayKlass* allocate(ClassLoaderData* loader_data, int n, KlassHandle klass_handle, Symbol* name, TRAPS);
aoqi@0	44	public:
aoqi@0	45	// For dummy objects
aoqi@0	46	ObjArrayKlass() {}
aoqi@0	47
aoqi@0	48	// Instance variables
aoqi@0	49	Klass* element_klass() const { return _element_klass; }
aoqi@0	50	void set_element_klass(Klass* k) { _element_klass = k; }
aoqi@0	51	Klass** element_klass_addr() { return &_element_klass; }
aoqi@0	52
aoqi@0	53	Klass* bottom_klass() const { return _bottom_klass; }
aoqi@0	54	void set_bottom_klass(Klass* k) { _bottom_klass = k; }
aoqi@0	55	Klass** bottom_klass_addr() { return &_bottom_klass; }
aoqi@0	56
aoqi@0	57	// Compiler/Interpreter offset
aoqi@0	58	static ByteSize element_klass_offset() { return in_ByteSize(offset_of(ObjArrayKlass, _element_klass)); }
aoqi@0	59
aoqi@0	60	// Dispatched operation
aoqi@0	61	bool can_be_primary_super_slow() const;
aoqi@0	62	GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots);
aoqi@0	63	bool compute_is_subtype_of(Klass* k);
aoqi@0	64	bool oop_is_objArray_slow() const { return true; }
aoqi@0	65	int oop_size(oop obj) const;
aoqi@0	66
aoqi@0	67	// Allocation
aoqi@0	68	static Klass* allocate_objArray_klass(ClassLoaderData* loader_data,
aoqi@0	69	int n, KlassHandle element_klass, TRAPS);
aoqi@0	70
aoqi@0	71	objArrayOop allocate(int length, TRAPS);
aoqi@0	72	oop multi_allocate(int rank, jint* sizes, TRAPS);
aoqi@0	73
aoqi@0	74	// Copying
aoqi@0	75	void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
aoqi@0	76
aoqi@0	77	// Compute protection domain
aoqi@0	78	oop protection_domain() const { return bottom_klass()->protection_domain(); }
aoqi@0	79
aoqi@0	80	private:
aoqi@0	81	// Either oop or narrowOop depending on UseCompressedOops.
aoqi@0	82	// must be called from within ObjArrayKlass.cpp
aoqi@0	83	template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
aoqi@0	84	T* dst, int length, TRAPS);
aoqi@0	85	protected:
aoqi@0	86	// Returns the ObjArrayKlass for n'th dimension.
aoqi@0	87	virtual Klass* array_klass_impl(bool or_null, int n, TRAPS);
aoqi@0	88
aoqi@0	89	// Returns the array class with this class as element type.
aoqi@0	90	virtual Klass* array_klass_impl(bool or_null, TRAPS);
aoqi@0	91
aoqi@0	92	public:
aoqi@0	93	// Casting from Klass*
aoqi@0	94	static ObjArrayKlass* cast(Klass* k) {
aoqi@0	95	assert(k->oop_is_objArray(), "cast to ObjArrayKlass");
aoqi@0	96	return (ObjArrayKlass*) k;
aoqi@0	97	}
aoqi@0	98
aoqi@0	99	// Sizing
aoqi@0	100	static int header_size() { return sizeof(ObjArrayKlass)/HeapWordSize; }
aoqi@0	101	int size() const { return ArrayKlass::static_size(header_size()); }
aoqi@0	102
aoqi@0	103	// Initialization (virtual from Klass)
aoqi@0	104	void initialize(TRAPS);
aoqi@0	105
aoqi@0	106	// Garbage collection
aoqi@0	107	void oop_follow_contents(oop obj);
aoqi@0	108	inline void oop_follow_contents(oop obj, int index);
aoqi@0	109	template <class T> inline void objarray_follow_contents(oop obj, int index);
aoqi@0	110
aoqi@0	111	int oop_adjust_pointers(oop obj);
aoqi@0	112
aoqi@0	113	// Parallel Scavenge and Parallel Old
aoqi@0	114	PARALLEL_GC_DECLS
aoqi@0	115	#if INCLUDE_ALL_GCS
aoqi@0	116	inline void oop_follow_contents(ParCompactionManager* cm, oop obj, int index);
aoqi@0	117	template <class T> inline void
aoqi@0	118	objarray_follow_contents(ParCompactionManager* cm, oop obj, int index);
aoqi@0	119	#endif // INCLUDE_ALL_GCS
aoqi@0	120
aoqi@0	121	// Iterators
aoqi@0	122	int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
aoqi@0	123	return oop_oop_iterate_v(obj, blk);
aoqi@0	124	}
aoqi@0	125	int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
aoqi@0	126	return oop_oop_iterate_v_m(obj, blk, mr);
aoqi@0	127	}
aoqi@0	128	#define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
aoqi@0	129	int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
aoqi@0	130	int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
aoqi@0	131	MemRegion mr); \
aoqi@0	132	int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk, \
aoqi@0	133	int start, int end);
aoqi@0	134
aoqi@0	135	ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
aoqi@0	136	ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
aoqi@0	137
aoqi@0	138	// JVM support
aoqi@0	139	jint compute_modifier_flags(TRAPS) const;
aoqi@0	140
aoqi@0	141	public:
aoqi@0	142	// Printing
aoqi@0	143	void print_on(outputStream* st) const;
aoqi@0	144	void print_value_on(outputStream* st) const;
aoqi@0	145
aoqi@0	146	void oop_print_value_on(oop obj, outputStream* st);
aoqi@0	147	#ifndef PRODUCT
aoqi@0	148	void oop_print_on (oop obj, outputStream* st);
aoqi@0	149	#endif //PRODUCT
aoqi@0	150
aoqi@0	151	const char* internal_name() const;
aoqi@0	152
aoqi@0	153	// Verification
aoqi@0	154	void verify_on(outputStream* st);
aoqi@0	155
aoqi@0	156	void oop_verify_on(oop obj, outputStream* st);
aoqi@0	157	};
aoqi@0	158
aoqi@0	159	#endif // SHARE_VM_OOPS_OBJARRAYKLASS_HPP