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src/share/vm/memory/classify.hpp@8ce625481709 (annotated)

src/share/vm/memory/classify.hpp

Fri, 15 Apr 2011 09:36:28 -0400

author

coleenp

date

Fri, 15 Apr 2011 09:36:28 -0400

changeset 2777

8ce625481709

parent 2314

f95d63e2154a

permissions

-rw-r--r--

7032407: Crash in LinkResolver::runtime_resolve_virtual_method()
Summary: Make CDS reorder vtables so that dump time vtables match run time order, so when redefine classes reinitializes them, they aren't in the wrong order.
Reviewed-by: dcubed, acorn

duke@435	1	/*
stefank@2314	2	* Copyright (c) 2003, 2010, 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_MEMORY_CLASSIFY_HPP
stefank@2314	26	#define SHARE_VM_MEMORY_CLASSIFY_HPP
stefank@2314	27
stefank@2314	28	#include "oops/oop.inline.hpp"
stefank@2314	29
duke@435	30	typedef enum oop_type {
duke@435	31	unknown_type,
duke@435	32	instance_type,
duke@435	33	instanceRef_type,
duke@435	34	objArray_type,
duke@435	35	symbol_type,
duke@435	36	klass_type,
duke@435	37	instanceKlass_type,
duke@435	38	method_type,
duke@435	39	constMethod_type,
duke@435	40	methodData_type,
duke@435	41	constantPool_type,
duke@435	42	constantPoolCache_type,
duke@435	43	typeArray_type,
duke@435	44	compiledICHolder_type,
duke@435	45	number_object_types
duke@435	46	} object_type;
duke@435	47
duke@435	48
duke@435	49	// Classify objects by type and keep counts.
duke@435	50	// Print the count and space taken for each type.
duke@435	51
duke@435	52
duke@435	53	class ClassifyObjectClosure : public ObjectClosure {
duke@435	54	private:
duke@435	55
duke@435	56	static const char* object_type_name[number_object_types];
duke@435	57
duke@435	58	int total_object_count;
duke@435	59	size_t total_object_size;
duke@435	60	int object_count[number_object_types];
duke@435	61	size_t object_size[number_object_types];
duke@435	62
duke@435	63	public:
duke@435	64	ClassifyObjectClosure() { reset(); }
duke@435	65	void reset();
duke@435	66	void do_object(oop obj);
duke@435	67	static object_type classify_object(oop obj, bool count);
duke@435	68	size_t print();
duke@435	69	};
duke@435	70
duke@435	71
duke@435	72	// Count objects using the alloc_count field in the object's klass
duke@435	73	// object.
duke@435	74
duke@435	75	class ClassifyInstanceKlassClosure : public ClassifyObjectClosure {
duke@435	76	private:
duke@435	77	int total_instances;
duke@435	78	public:
duke@435	79	ClassifyInstanceKlassClosure() { reset(); }
duke@435	80	void reset();
duke@435	81	void print();
duke@435	82	void do_object(oop obj);
duke@435	83	};
duke@435	84
duke@435	85
duke@435	86	// Clear the alloc_count fields in all classes so that the count can be
duke@435	87	// restarted.
duke@435	88
duke@435	89	class ClearAllocCountClosure : public ObjectClosure {
duke@435	90	public:
duke@435	91	void do_object(oop obj) {
duke@435	92	if (obj->is_klass()) {
duke@435	93	Klass* k = Klass::cast((klassOop)obj);
duke@435	94	k->set_alloc_count(0);
duke@435	95	}
duke@435	96	}
duke@435	97	};
stefank@2314	98
stefank@2314	99	#endif // SHARE_VM_MEMORY_CLASSIFY_HPP