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src/share/vm/prims/jvmtiTagMap.hpp@eef07cd490d4 (annotated)

src/share/vm/prims/jvmtiTagMap.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	// JvmtiTagMap
aoqi@0	26
aoqi@0	27	#ifndef SHARE_VM_PRIMS_JVMTITAGMAP_HPP
aoqi@0	28	#define SHARE_VM_PRIMS_JVMTITAGMAP_HPP
aoqi@0	29
aoqi@0	30	#include "gc_interface/collectedHeap.hpp"
aoqi@0	31	#include "jvmtifiles/jvmti.h"
aoqi@0	32	#include "jvmtifiles/jvmtiEnv.hpp"
aoqi@0	33	#include "memory/allocation.hpp"
aoqi@0	34	#include "memory/genCollectedHeap.hpp"
aoqi@0	35	#include "memory/universe.hpp"
aoqi@0	36
aoqi@0	37	// forward references
aoqi@0	38	class JvmtiTagHashmap;
aoqi@0	39	class JvmtiTagHashmapEntry;
aoqi@0	40	class JvmtiTagHashmapEntryClosure;
aoqi@0	41
aoqi@0	42	class JvmtiTagMap : public CHeapObj<mtInternal> {
aoqi@0	43	private:
aoqi@0	44
aoqi@0	45	enum{
aoqi@0	46	max_free_entries = 4096 // maximum number of free entries per env
aoqi@0	47	};
aoqi@0	48
aoqi@0	49	JvmtiEnv* _env; // the jvmti environment
aoqi@0	50	Mutex _lock; // lock for this tag map
aoqi@0	51	JvmtiTagHashmap* _hashmap; // the hashmap
aoqi@0	52
aoqi@0	53	JvmtiTagHashmapEntry* _free_entries; // free list for this environment
aoqi@0	54	int _free_entries_count; // number of entries on the free list
aoqi@0	55
aoqi@0	56	// create a tag map
aoqi@0	57	JvmtiTagMap(JvmtiEnv* env);
aoqi@0	58
aoqi@0	59	// accessors
aoqi@0	60	inline Mutex* lock() { return &_lock; }
aoqi@0	61	inline JvmtiEnv* env() const { return _env; }
aoqi@0	62
aoqi@0	63	void do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f);
aoqi@0	64
aoqi@0	65	// iterate over all entries in this tag map
aoqi@0	66	void entry_iterate(JvmtiTagHashmapEntryClosure* closure);
aoqi@0	67
aoqi@0	68	public:
aoqi@0	69
aoqi@0	70	// indicates if this tag map is locked
aoqi@0	71	bool is_locked() { return lock()->is_locked(); }
aoqi@0	72
aoqi@0	73	JvmtiTagHashmap* hashmap() { return _hashmap; }
aoqi@0	74
aoqi@0	75	// create/destroy entries
aoqi@0	76	JvmtiTagHashmapEntry* create_entry(oop ref, jlong tag);
aoqi@0	77	void destroy_entry(JvmtiTagHashmapEntry* entry);
aoqi@0	78
aoqi@0	79	// returns true if the hashmaps are empty
aoqi@0	80	bool is_empty();
aoqi@0	81
aoqi@0	82	// return tag for the given environment
aoqi@0	83	static JvmtiTagMap* tag_map_for(JvmtiEnv* env);
aoqi@0	84
aoqi@0	85	// destroy tag map
aoqi@0	86	~JvmtiTagMap();
aoqi@0	87
aoqi@0	88	// set/get tag
aoqi@0	89	void set_tag(jobject obj, jlong tag);
aoqi@0	90	jlong get_tag(jobject obj);
aoqi@0	91
aoqi@0	92	// deprecated heap iteration functions
aoqi@0	93	void iterate_over_heap(jvmtiHeapObjectFilter object_filter,
aoqi@0	94	KlassHandle klass,
aoqi@0	95	jvmtiHeapObjectCallback heap_object_callback,
aoqi@0	96	const void* user_data);
aoqi@0	97
aoqi@0	98	void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,
aoqi@0	99	jvmtiStackReferenceCallback stack_ref_callback,
aoqi@0	100	jvmtiObjectReferenceCallback object_ref_callback,
aoqi@0	101	const void* user_data);
aoqi@0	102
aoqi@0	103	void iterate_over_objects_reachable_from_object(jobject object,
aoqi@0	104	jvmtiObjectReferenceCallback object_reference_callback,
aoqi@0	105	const void* user_data);
aoqi@0	106
aoqi@0	107
aoqi@0	108	// advanced (JVMTI 1.1) heap iteration functions
aoqi@0	109	void iterate_through_heap(jint heap_filter,
aoqi@0	110	KlassHandle klass,
aoqi@0	111	const jvmtiHeapCallbacks* callbacks,
aoqi@0	112	const void* user_data);
aoqi@0	113
aoqi@0	114	void follow_references(jint heap_filter,
aoqi@0	115	KlassHandle klass,
aoqi@0	116	jobject initial_object,
aoqi@0	117	const jvmtiHeapCallbacks* callbacks,
aoqi@0	118	const void* user_data);
aoqi@0	119
aoqi@0	120	// get tagged objects
aoqi@0	121	jvmtiError get_objects_with_tags(const jlong* tags, jint count,
aoqi@0	122	jint* count_ptr, jobject** object_result_ptr,
aoqi@0	123	jlong** tag_result_ptr);
aoqi@0	124
aoqi@0	125	static void weak_oops_do(
aoqi@0	126	BoolObjectClosure* is_alive, OopClosure* f) NOT_JVMTI_RETURN;
aoqi@0	127	};
aoqi@0	128
aoqi@0	129	#endif // SHARE_VM_PRIMS_JVMTITAGMAP_HPP