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src/share/vm/services/classLoadingService.hpp@eef07cd490d4 (annotated)

src/share/vm/services/classLoadingService.hpp

Wed, 03 Jul 2019 20:42:37 +0800

author

aoqi

date

Wed, 03 Jul 2019 20:42:37 +0800

changeset 9637

eef07cd490d4

parent 6876

710a3c8b516e

permissions

-rw-r--r--

Merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
aoqi@0	26	#define SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP
aoqi@0	27
aoqi@0	28	#include "runtime/handles.hpp"
aoqi@0	29	#include "runtime/perfData.hpp"
aoqi@0	30	#include "utilities/growableArray.hpp"
aoqi@0	31	#include "utilities/macros.hpp"
aoqi@0	32
aoqi@0	33	class InstanceKlass;
aoqi@0	34
aoqi@0	35	// VM monitoring and management support for the Class Loading subsystem
aoqi@0	36	class ClassLoadingService : public AllStatic {
aoqi@0	37	private:
aoqi@0	38	// Counters for classes loaded from class files
aoqi@0	39	static PerfCounter* _classes_loaded_count;
aoqi@0	40	static PerfCounter* _classes_unloaded_count;
aoqi@0	41	static PerfCounter* _classbytes_loaded;
aoqi@0	42	static PerfCounter* _classbytes_unloaded;
aoqi@0	43
aoqi@0	44	// Counters for classes loaded from shared archive
aoqi@0	45	static PerfCounter* _shared_classes_loaded_count;
aoqi@0	46	static PerfCounter* _shared_classes_unloaded_count;
aoqi@0	47	static PerfCounter* _shared_classbytes_loaded;
aoqi@0	48	static PerfCounter* _shared_classbytes_unloaded;
aoqi@0	49
aoqi@0	50	static PerfVariable* _class_methods_size;
aoqi@0	51
aoqi@0	52	static size_t compute_class_size(InstanceKlass* k);
aoqi@0	53
aoqi@0	54	public:
aoqi@0	55	static void init();
aoqi@0	56
aoqi@0	57	static bool get_verbose() { return TraceClassLoading; }
aoqi@0	58	static bool set_verbose(bool verbose);
aoqi@0	59	static void reset_trace_class_unloading() NOT_MANAGEMENT_RETURN;
aoqi@0	60
aoqi@0	61	static jlong loaded_class_count() {
aoqi@0	62	return _classes_loaded_count->get_value() + _shared_classes_loaded_count->get_value();
aoqi@0	63	}
aoqi@0	64	static jlong unloaded_class_count() {
aoqi@0	65	return _classes_unloaded_count->get_value() + _shared_classes_unloaded_count->get_value();
aoqi@0	66	}
aoqi@0	67	static jlong loaded_class_bytes() {
aoqi@0	68	if (UsePerfData) {
aoqi@0	69	return _classbytes_loaded->get_value() + _shared_classbytes_loaded->get_value();
aoqi@0	70	} else {
aoqi@0	71	return -1;
aoqi@0	72	}
aoqi@0	73	}
aoqi@0	74	static jlong unloaded_class_bytes() {
aoqi@0	75	if (UsePerfData) {
aoqi@0	76	return _classbytes_unloaded->get_value() + _shared_classbytes_unloaded->get_value();
aoqi@0	77	} else {
aoqi@0	78	return -1;
aoqi@0	79	}
aoqi@0	80	}
aoqi@0	81
aoqi@0	82	static jlong loaded_shared_class_count() {
aoqi@0	83	return _shared_classes_loaded_count->get_value();
aoqi@0	84	}
aoqi@0	85	static jlong unloaded_shared_class_count() {
aoqi@0	86	return _shared_classes_unloaded_count->get_value();
aoqi@0	87	}
aoqi@0	88	static jlong loaded_shared_class_bytes() {
aoqi@0	89	if (UsePerfData) {
aoqi@0	90	return _shared_classbytes_loaded->get_value();
aoqi@0	91	} else {
aoqi@0	92	return -1;
aoqi@0	93	}
aoqi@0	94	}
aoqi@0	95	static jlong unloaded_shared_class_bytes() {
aoqi@0	96	if (UsePerfData) {
aoqi@0	97	return _shared_classbytes_unloaded->get_value();
aoqi@0	98	} else {
aoqi@0	99	return -1;
aoqi@0	100	}
aoqi@0	101	}
aoqi@0	102	static jlong class_method_data_size() {
aoqi@0	103	return (UsePerfData ? _class_methods_size->get_value() : -1);
aoqi@0	104	}
aoqi@0	105
aoqi@0	106	static void notify_class_loaded(InstanceKlass* k, bool shared_class)
aoqi@0	107	NOT_MANAGEMENT_RETURN;
aoqi@0	108	// All unloaded classes are non-shared
aoqi@0	109	static void notify_class_unloaded(InstanceKlass* k) NOT_MANAGEMENT_RETURN;
aoqi@0	110	static void add_class_method_size(int size) {
aoqi@0	111	#if INCLUDE_MANAGEMENT
aoqi@0	112	if (UsePerfData) {
aoqi@0	113	_class_methods_size->inc(size);
aoqi@0	114	}
aoqi@0	115	#endif // INCLUDE_MANAGEMENT
aoqi@0	116	}
aoqi@0	117	};
aoqi@0	118
aoqi@0	119	// FIXME: make this piece of code to be shared by M&M and JVMTI
aoqi@0	120	class LoadedClassesEnumerator : public StackObj {
aoqi@0	121	private:
aoqi@0	122	static GrowableArray<KlassHandle>* _loaded_classes;
aoqi@0	123	// _current_thread is for creating a KlassHandle with a faster version constructor
aoqi@0	124	static Thread* _current_thread;
aoqi@0	125
aoqi@0	126	GrowableArray<KlassHandle>* _klass_handle_array;
aoqi@0	127
aoqi@0	128	public:
aoqi@0	129	LoadedClassesEnumerator(Thread* cur_thread);
aoqi@0	130
aoqi@0	131	int num_loaded_classes() { return _klass_handle_array->length(); }
aoqi@0	132	KlassHandle get_klass(int index) { return _klass_handle_array->at(index); }
aoqi@0	133
aoqi@0	134	static void add_loaded_class(Klass* k) {
aoqi@0	135	// FIXME: For now - don't include array klasses
aoqi@0	136	// The spec is unclear at this point to count array klasses or not
aoqi@0	137	// and also indirect creation of array of super class and secondaries
aoqi@0	138	//
aoqi@0	139	// for (Klass* l = k; l != NULL; l = l->array_klass_or_null()) {
aoqi@0	140	// KlassHandle h(_current_thread, l);
aoqi@0	141	// _loaded_classes->append(h);
aoqi@0	142	// }
aoqi@0	143	KlassHandle h(_current_thread, k);
aoqi@0	144	_loaded_classes->append(h);
aoqi@0	145	}
aoqi@0	146	};
aoqi@0	147
aoqi@0	148	#endif // SHARE_VM_SERVICES_CLASSLOADINGSERVICE_HPP