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src/share/vm/oops/instanceKlassKlass.hpp@49036505ab5f (annotated)

src/share/vm/oops/instanceKlassKlass.hpp

Thu, 29 Mar 2012 22:18:56 -0400

author

jiangli

date

Thu, 29 Mar 2012 22:18:56 -0400

changeset 3701

49036505ab5f

parent 2658

c7f3d0b4570f

child 3741

8bafad97cd26

permissions

-rw-r--r--

7154670: The instanceKlass _implementors[] and _nof_implementors are not needed for non-interface klass.
Summary: Change implementor to embedded instanceKlass field.
Reviewed-by: sspitsyn, minqi, coleenp

duke@435	1	/*
jiangli@3701	2	* Copyright (c) 1997, 2012, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP
stefank@2314	26	#define SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP
stefank@2314	27
stefank@2314	28	#include "oops/klassKlass.hpp"
stefank@2314	29
duke@435	30	// An instanceKlassKlass is the klass of an instanceKlass
duke@435	31
duke@435	32	class instanceKlassKlass : public klassKlass {
duke@435	33	public:
duke@435	34	// Dispatched operation
duke@435	35	bool oop_is_klass() const { return true; }
duke@435	36	bool oop_is_instanceKlass() const { return true; }
duke@435	37
duke@435	38	int oop_size(oop obj) const;
duke@435	39	int klass_oop_size() const { return object_size(); }
duke@435	40
duke@435	41	// Allocation
duke@435	42	DEFINE_ALLOCATE_PERMANENT(instanceKlassKlass);
duke@435	43	static klassOop create_klass(TRAPS);
never@2658	44	klassOop allocate_instance_klass(Symbol* name,
never@2658	45	int vtable_len,
duke@435	46	int itable_len,
duke@435	47	int static_field_size,
jcoomes@1374	48	unsigned int nonstatic_oop_map_count,
jiangli@3701	49	AccessFlags access_flags,
duke@435	50	ReferenceType rt,
duke@435	51	TRAPS);
duke@435	52
duke@435	53	// Casting from klassOop
duke@435	54	static instanceKlassKlass* cast(klassOop k) {
duke@435	55	assert(k->klass_part()->oop_is_klass(), "cast to instanceKlassKlass");
duke@435	56	return (instanceKlassKlass*) k->klass_part();
duke@435	57	}
duke@435	58
duke@435	59	// Sizing
duke@435	60	static int header_size() { return oopDesc::header_size() + sizeof(instanceKlassKlass)/HeapWordSize; }
duke@435	61	int object_size() const { return align_object_size(header_size()); }
duke@435	62
duke@435	63	// Garbage collection
duke@435	64	void oop_follow_contents(oop obj);
duke@435	65	int oop_adjust_pointers(oop obj);
duke@435	66	bool oop_is_parsable(oop obj) const;
duke@435	67
duke@435	68	// Parallel Scavenge and Parallel Old
duke@435	69	PARALLEL_GC_DECLS
duke@435	70
duke@435	71	// Iterators
duke@435	72	int oop_oop_iterate(oop obj, OopClosure* blk);
duke@435	73	int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
duke@435	74
duke@435	75	private:
duke@435	76	// Apply closure to the InstanceKlass oops that are outside the java heap.
duke@435	77	inline void iterate_c_heap_oops(instanceKlass* ik, OopClosure* closure);
duke@435	78
duke@435	79	public:
duke@435	80	// Printing
jrose@1590	81	void oop_print_value_on(oop obj, outputStream* st);
jrose@1590	82	#ifndef PRODUCT
duke@435	83	void oop_print_on(oop obj, outputStream* st);
duke@435	84	#endif
duke@435	85
duke@435	86	// Verification
duke@435	87	const char* internal_name() const;
duke@435	88	void oop_verify_on(oop obj, outputStream* st);
duke@435	89	// tells whether obj is partially constructed (gc during class loading)
duke@435	90	bool oop_partially_loaded(oop obj) const;
duke@435	91	void oop_set_partially_loaded(oop obj);
duke@435	92	};
stefank@2314	93
stefank@2314	94	#endif // SHARE_VM_OOPS_INSTANCEKLASSKLASS_HPP