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src/share/vm/oops/instanceMirrorKlass.hpp@190899198332 (annotated)

src/share/vm/oops/instanceMirrorKlass.hpp

Thu, 26 Sep 2013 10:25:02 -0400

author

hseigel

date

Thu, 26 Sep 2013 10:25:02 -0400

changeset 5784

190899198332

parent 4542

db9981fd3124

child 6876

710a3c8b516e

permissions

-rw-r--r--

7195622: CheckUnhandledOops has limited usefulness now
Summary: Enable CHECK_UNHANDLED_OOPS in fastdebug builds across all supported platforms.
Reviewed-by: coleenp, hseigel, dholmes, stefank, twisti, ihse, rdurbin
Contributed-by: lois.foltan@oracle.com

never@2658	1	/*
hseigel@5784	2	* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
never@2658	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@2658	4	*
never@2658	5	* This code is free software; you can redistribute it and/or modify it
never@2658	6	* under the terms of the GNU General Public License version 2 only, as
never@2658	7	* published by the Free Software Foundation.
never@2658	8	*
never@2658	9	* This code is distributed in the hope that it will be useful, but WITHOUT
never@2658	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@2658	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@2658	12	* version 2 for more details (a copy is included in the LICENSE file that
never@2658	13	* accompanied this code).
never@2658	14	*
never@2658	15	* You should have received a copy of the GNU General Public License version
never@2658	16	* 2 along with this work; if not, write to the Free Software Foundation,
never@2658	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@2658	18	*
never@2658	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
never@2658	20	* or visit www.oracle.com if you need additional information or have any
never@2658	21	* questions.
never@2658	22	*
never@2658	23	*/
never@2658	24
never@2658	25	#ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
never@2658	26	#define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP
never@2658	27
coleenp@4037	28	#include "classfile/systemDictionary.hpp"
never@2658	29	#include "oops/instanceKlass.hpp"
coleenp@4037	30	#include "runtime/handles.hpp"
jprovino@4542	31	#include "utilities/macros.hpp"
never@2658	32
coleenp@4047	33	// An InstanceMirrorKlass is a specialized InstanceKlass for
never@2658	34	// java.lang.Class instances. These instances are special because
never@2658	35	// they contain the static fields of the class in addition to the
never@2658	36	// normal fields of Class. This means they are variable sized
never@2658	37	// instances and need special logic for computing their size and for
never@2658	38	// iteration of their oops.
never@2658	39
never@2658	40
coleenp@4047	41	class InstanceMirrorKlass: public InstanceKlass {
never@2693	42	friend class VMStructs;
coleenp@4037	43	friend class InstanceKlass;
never@2693	44
never@2658	45	private:
never@2658	46	static int _offset_of_static_fields;
never@2658	47
coleenp@4037	48	// Constructor
coleenp@4047	49	InstanceMirrorKlass(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	50	: InstanceKlass(vtable_len, itable_len, static_field_size, nonstatic_oop_map_size, rt, access_flags, is_anonymous) {}
coleenp@4037	51
never@2658	52	public:
coleenp@4047	53	InstanceMirrorKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
never@2658	54	// Type testing
never@2658	55	bool oop_is_instanceMirror() const { return true; }
never@2658	56
coleenp@4037	57	// Casting from Klass*
coleenp@4047	58	static InstanceMirrorKlass* cast(Klass* k) {
coleenp@4047	59	assert(k->oop_is_instanceMirror(), "cast to InstanceMirrorKlass");
coleenp@4047	60	return (InstanceMirrorKlass*) k;
never@2658	61	}
never@2658	62
never@2658	63	// Returns the size of the instance including the extra static fields.
never@2658	64	virtual int oop_size(oop obj) const;
never@2658	65
never@2658	66	// Static field offset is an offset into the Heap, should be converted by
never@2658	67	// based on UseCompressedOop for traversal
never@2658	68	static HeapWord* start_of_static_fields(oop obj) {
hseigel@5784	69	return (HeapWord*)(cast_from_oop<intptr_t>(obj) + offset_of_static_fields());
never@2658	70	}
never@2658	71
never@2658	72	static void init_offset_of_static_fields() {
never@2658	73	// Cache the offset of the static fields in the Class instance
never@2658	74	assert(_offset_of_static_fields == 0, "once");
coleenp@4047	75	_offset_of_static_fields = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->size_helper() << LogHeapWordSize;
never@2658	76	}
never@2658	77
never@2658	78	static int offset_of_static_fields() {
never@2658	79	return _offset_of_static_fields;
never@2658	80	}
never@2658	81
never@2658	82	int compute_static_oop_field_count(oop obj);
never@2658	83
never@2658	84	// Given a Klass return the size of the instance
never@2658	85	int instance_size(KlassHandle k);
never@2658	86
never@2658	87	// allocation
never@2658	88	instanceOop allocate_instance(KlassHandle k, TRAPS);
never@2658	89
never@2658	90	// Garbage collection
never@2658	91	int oop_adjust_pointers(oop obj);
never@2658	92	void oop_follow_contents(oop obj);
never@2658	93
never@2658	94	// Parallel Scavenge and Parallel Old
never@2658	95	PARALLEL_GC_DECLS
never@2658	96
coleenp@4037	97	int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) {
never@2658	98	return oop_oop_iterate_v(obj, blk);
never@2658	99	}
coleenp@4037	100	int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) {
never@2658	101	return oop_oop_iterate_v_m(obj, blk, mr);
never@2658	102	}
never@2658	103
never@2658	104	#define InstanceMirrorKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
never@2658	105	int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
never@2658	106	int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, MemRegion mr);
never@2658	107
never@2658	108	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
never@2658	109	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_DECL)
never@2658	110
jprovino@4542	111	#if INCLUDE_ALL_GCS
never@2658	112	#define InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
never@2658	113	int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
never@2658	114
never@2658	115	ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
never@2658	116	ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceMirrorKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
jprovino@4542	117	#endif // INCLUDE_ALL_GCS
never@2658	118	};
never@2658	119
never@2658	120	#endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_HPP