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src/share/vm/oops/objArrayKlass.hpp@37f87013dfd8 (annotated)

src/share/vm/oops/objArrayKlass.hpp

Thu, 05 Jun 2008 15:57:56 -0700

author

ysr

date

Thu, 05 Jun 2008 15:57:56 -0700

changeset 777

37f87013dfd8

parent 548

ba764ed4b6f2

child 791

1ee8caae33af

permissions

-rw-r--r--

6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

duke@435	1	/*
duke@435	2	* Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// objArrayKlass is the klass for objArrays
duke@435	26
duke@435	27	class objArrayKlass : public arrayKlass {
duke@435	28	friend class VMStructs;
duke@435	29	private:
duke@435	30	klassOop _element_klass; // The klass of the elements of this array type
duke@435	31	klassOop _bottom_klass; // The one-dimensional type (instanceKlass or typeArrayKlass)
duke@435	32	public:
duke@435	33	// Instance variables
duke@435	34	klassOop element_klass() const { return _element_klass; }
duke@435	35	void set_element_klass(klassOop k) { oop_store_without_check((oop*) &_element_klass, (oop) k); }
duke@435	36	oop* element_klass_addr() { return (oop*)&_element_klass; }
duke@435	37
duke@435	38	klassOop bottom_klass() const { return _bottom_klass; }
duke@435	39	void set_bottom_klass(klassOop k) { oop_store_without_check((oop*) &_bottom_klass, (oop) k); }
duke@435	40	oop* bottom_klass_addr() { return (oop*)&_bottom_klass; }
duke@435	41
duke@435	42	// Compiler/Interpreter offset
duke@435	43	static int element_klass_offset_in_bytes() { return offset_of(objArrayKlass, _element_klass); }
duke@435	44
duke@435	45	// Dispatched operation
duke@435	46	bool can_be_primary_super_slow() const;
duke@435	47	objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
duke@435	48	bool compute_is_subtype_of(klassOop k);
duke@435	49	bool oop_is_objArray_slow() const { return true; }
duke@435	50	int oop_size(oop obj) const;
duke@435	51	int klass_oop_size() const { return object_size(); }
duke@435	52
duke@435	53	// Allocation
duke@435	54	DEFINE_ALLOCATE_PERMANENT(objArrayKlass);
duke@435	55	objArrayOop allocate(int length, TRAPS);
duke@435	56	oop multi_allocate(int rank, jint* sizes, TRAPS);
duke@435	57
duke@435	58	// Copying
duke@435	59	void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS);
duke@435	60
duke@435	61	// Compute protection domain
duke@435	62	oop protection_domain() { return Klass::cast(bottom_klass())->protection_domain(); }
duke@435	63	// Compute class loader
duke@435	64	oop class_loader() const { return Klass::cast(bottom_klass())->class_loader(); }
duke@435	65
coleenp@548	66	private:
coleenp@548	67	// Either oop or narrowOop depending on UseCompressedOops.
coleenp@548	68	// must be called from within objArrayKlass.cpp
coleenp@548	69	template <class T> void do_copy(arrayOop s, T* src, arrayOop d,
coleenp@548	70	T* dst, int length, TRAPS);
duke@435	71	protected:
duke@435	72	// Returns the objArrayKlass for n'th dimension.
duke@435	73	virtual klassOop array_klass_impl(bool or_null, int n, TRAPS);
duke@435	74
duke@435	75	// Returns the array class with this class as element type.
duke@435	76	virtual klassOop array_klass_impl(bool or_null, TRAPS);
duke@435	77
duke@435	78	public:
duke@435	79	// Casting from klassOop
duke@435	80	static objArrayKlass* cast(klassOop k) {
duke@435	81	assert(k->klass_part()->oop_is_objArray_slow(), "cast to objArrayKlass");
duke@435	82	return (objArrayKlass*) k->klass_part();
duke@435	83	}
duke@435	84
duke@435	85	// Sizing
duke@435	86	static int header_size() { return oopDesc::header_size() + sizeof(objArrayKlass)/HeapWordSize; }
duke@435	87	int object_size() const { return arrayKlass::object_size(header_size()); }
duke@435	88
duke@435	89	// Initialization (virtual from Klass)
duke@435	90	void initialize(TRAPS);
duke@435	91
duke@435	92	// Garbage collection
duke@435	93	void oop_follow_contents(oop obj);
duke@435	94	int oop_adjust_pointers(oop obj);
duke@435	95
duke@435	96	// Parallel Scavenge and Parallel Old
duke@435	97	PARALLEL_GC_DECLS
duke@435	98
duke@435	99	// Iterators
duke@435	100	int oop_oop_iterate(oop obj, OopClosure* blk) {
duke@435	101	return oop_oop_iterate_v(obj, blk);
duke@435	102	}
duke@435	103	int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
duke@435	104	return oop_oop_iterate_v_m(obj, blk, mr);
duke@435	105	}
duke@435	106	#define ObjArrayKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
duke@435	107	int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
duke@435	108	int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
coleenp@548	109	MemRegion mr); \
coleenp@548	110	int oop_oop_iterate_range##nv_suffix(oop obj, OopClosureType* blk, \
coleenp@548	111	int start, int end);
duke@435	112
duke@435	113	ALL_OOP_OOP_ITERATE_CLOSURES_1(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
ysr@777	114	ALL_OOP_OOP_ITERATE_CLOSURES_2(ObjArrayKlass_OOP_OOP_ITERATE_DECL)
duke@435	115
duke@435	116	// JVM support
duke@435	117	jint compute_modifier_flags(TRAPS) const;
duke@435	118
duke@435	119	private:
duke@435	120	static klassOop array_klass_impl (objArrayKlassHandle this_oop, bool or_null, int n, TRAPS);
duke@435	121
duke@435	122	#ifndef PRODUCT
duke@435	123	public:
duke@435	124	// Printing
duke@435	125	void oop_print_on (oop obj, outputStream* st);
duke@435	126	void oop_print_value_on(oop obj, outputStream* st);
duke@435	127	#endif
duke@435	128
duke@435	129	public:
duke@435	130	// Verification
duke@435	131	const char* internal_name() const;
duke@435	132	void oop_verify_on(oop obj, outputStream* st);
duke@435	133	void oop_verify_old_oop(oop obj, oop* p, bool allow_dirty);
coleenp@548	134	void oop_verify_old_oop(oop obj, narrowOop* p, bool allow_dirty);
duke@435	135
duke@435	136	};