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src/share/vm/memory/classify.hpp@4788266644c1 (annotated)

src/share/vm/memory/classify.hpp

Thu, 21 Jan 2010 11:33:32 -0800

author

jmasa

date

Thu, 21 Jan 2010 11:33:32 -0800

changeset 1625

4788266644c1

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6895236: CMS: cmsOopClosures.inline.hpp:43 assert(..., "Should remember klasses in this context")
Summary: Adjust assertion checking for ExplicitGCInvokesConcurrentAndUnloadsClasses as a reason for class unloading
Reviewed-by: ysr

duke@435	1	/*
duke@435	2	* Copyright 2003-2007 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	typedef enum oop_type {
duke@435	26	unknown_type,
duke@435	27	instance_type,
duke@435	28	instanceRef_type,
duke@435	29	objArray_type,
duke@435	30	symbol_type,
duke@435	31	klass_type,
duke@435	32	instanceKlass_type,
duke@435	33	method_type,
duke@435	34	constMethod_type,
duke@435	35	methodData_type,
duke@435	36	constantPool_type,
duke@435	37	constantPoolCache_type,
duke@435	38	typeArray_type,
duke@435	39	compiledICHolder_type,
duke@435	40	number_object_types
duke@435	41	} object_type;
duke@435	42
duke@435	43
duke@435	44	// Classify objects by type and keep counts.
duke@435	45	// Print the count and space taken for each type.
duke@435	46
duke@435	47
duke@435	48	class ClassifyObjectClosure : public ObjectClosure {
duke@435	49	private:
duke@435	50
duke@435	51	static const char* object_type_name[number_object_types];
duke@435	52
duke@435	53	int total_object_count;
duke@435	54	size_t total_object_size;
duke@435	55	int object_count[number_object_types];
duke@435	56	size_t object_size[number_object_types];
duke@435	57
duke@435	58	public:
duke@435	59	ClassifyObjectClosure() { reset(); }
duke@435	60	void reset();
duke@435	61	void do_object(oop obj);
duke@435	62	static object_type classify_object(oop obj, bool count);
duke@435	63	size_t print();
duke@435	64	};
duke@435	65
duke@435	66
duke@435	67	// Count objects using the alloc_count field in the object's klass
duke@435	68	// object.
duke@435	69
duke@435	70	class ClassifyInstanceKlassClosure : public ClassifyObjectClosure {
duke@435	71	private:
duke@435	72	int total_instances;
duke@435	73	public:
duke@435	74	ClassifyInstanceKlassClosure() { reset(); }
duke@435	75	void reset();
duke@435	76	void print();
duke@435	77	void do_object(oop obj);
duke@435	78	};
duke@435	79
duke@435	80
duke@435	81	// Clear the alloc_count fields in all classes so that the count can be
duke@435	82	// restarted.
duke@435	83
duke@435	84	class ClearAllocCountClosure : public ObjectClosure {
duke@435	85	public:
duke@435	86	void do_object(oop obj) {
duke@435	87	if (obj->is_klass()) {
duke@435	88	Klass* k = Klass::cast((klassOop)obj);
duke@435	89	k->set_alloc_count(0);
duke@435	90	}
duke@435	91	}
duke@435	92	};