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src/share/vm/oops/instanceRefKlass.hpp@b84fd7d73702 (annotated)

src/share/vm/oops/instanceRefKlass.hpp

Tue, 09 Apr 2013 09:54:17 -0700

author

iignatyev

date

Tue, 09 Apr 2013 09:54:17 -0700

changeset 4908

b84fd7d73702

parent 4542

db9981fd3124

child 6198

55fb97c4c58d

permissions

-rw-r--r--

8007288: Additional WB API for compiler's testing
Reviewed-by: kvn, vlivanov

duke@435	1	/*
coleenp@4037	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_INSTANCEREFKLASS_HPP
stefank@2314	26	#define SHARE_VM_OOPS_INSTANCEREFKLASS_HPP
stefank@2314	27
stefank@2314	28	#include "oops/instanceKlass.hpp"
jprovino@4542	29	#include "utilities/macros.hpp"
stefank@2314	30
coleenp@4047	31	// An InstanceRefKlass is a specialized InstanceKlass for Java
duke@435	32	// classes that are subclasses of java/lang/ref/Reference.
duke@435	33	//
duke@435	34	// These classes are used to implement soft/weak/final/phantom
duke@435	35	// references and finalization, and need special treatment by the
duke@435	36	// garbage collector.
duke@435	37	//
duke@435	38	// During GC discovered reference objects are added (chained) to one
duke@435	39	// of the four lists below, depending on the type of reference.
duke@435	40	// The linked occurs through the next field in class java/lang/ref/Reference.
duke@435	41	//
duke@435	42	// Afterwards, the discovered references are processed in decreasing
duke@435	43	// order of reachability. Reference objects eligible for notification
duke@435	44	// are linked to the static pending_list in class java/lang/ref/Reference,
duke@435	45	// and the pending list lock object in the same class is notified.
duke@435	46
duke@435	47
coleenp@4047	48	class InstanceRefKlass: public InstanceKlass {
coleenp@4037	49	friend class InstanceKlass;
coleenp@4037	50
coleenp@4037	51	// Constructor
coleenp@4047	52	InstanceRefKlass(int vtable_len, int itable_len, int static_field_size, int nonstatic_oop_map_size, ReferenceType rt, AccessFlags access_flags, bool is_anonymous)
coleenp@4037	53	: InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
coleenp@4037	54
duke@435	55	public:
coleenp@4047	56	InstanceRefKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
duke@435	57	// Type testing
duke@435	58	bool oop_is_instanceRef() const { return true; }
duke@435	59
coleenp@4037	60	// Casting from Klass*
coleenp@4047	61	static InstanceRefKlass* cast(Klass* k) {
coleenp@4047	62	assert(k->oop_is_instanceRef(), "cast to InstanceRefKlass");
coleenp@4047	63	return (InstanceRefKlass*) k;
duke@435	64	}
duke@435	65
duke@435	66	// Garbage collection
duke@435	67	int oop_adjust_pointers(oop obj);
duke@435	68	void oop_follow_contents(oop obj);
duke@435	69
duke@435	70	// Parallel Scavenge and Parallel Old
duke@435	71	PARALLEL_GC_DECLS
duke@435	72
coleenp@4037	73	int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
duke@435	74	return oop_oop_iterate_v(obj, blk);
duke@435	75	}
coleenp@4037	76	int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
duke@435	77	return oop_oop_iterate_v_m(obj, blk, mr);
duke@435	78	}
duke@435	79
duke@435	80	#define InstanceRefKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
duke@435	81	int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
duke@435	82	int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
duke@435	83
duke@435	84	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
ysr@777	85	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_DECL)
ysr@777	86
jprovino@4542	87	#if INCLUDE_ALL_GCS
ysr@777	88	#define InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
ysr@777	89	int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
ysr@777	90
ysr@777	91	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
ysr@777	92	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceRefKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
jprovino@4542	93	#endif // INCLUDE_ALL_GCS
duke@435	94
duke@435	95	static void release_and_notify_pending_list_lock(BasicLock *pending_list_basic_lock);
duke@435	96	static void acquire_pending_list_lock(BasicLock *pending_list_basic_lock);
coleenp@2363	97	static bool owns_pending_list_lock(JavaThread* thread);
duke@435	98
duke@435	99	// Update non-static oop maps so 'referent', 'nextPending' and
duke@435	100	// 'discovered' will look like non-oops
coleenp@4037	101	static void update_nonstatic_oop_maps(Klass* k);
duke@435	102
duke@435	103	public:
duke@435	104	// Verification
duke@435	105	void oop_verify_on(oop obj, outputStream* st);
duke@435	106	};
stefank@2314	107
stefank@2314	108	#endif // SHARE_VM_OOPS_INSTANCEREFKLASS_HPP