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src/share/vm/prims/jvmtiTagMap.hpp@59c790074993 (annotated)

src/share/vm/prims/jvmtiTagMap.hpp

Wed, 28 Nov 2012 17:50:21 -0500

author

coleenp

date

Wed, 28 Nov 2012 17:50:21 -0500

changeset 4295

59c790074993

parent 4167

9855b7e559ae

child 4492

8b46b0196eb0

permissions

-rw-r--r--

8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
Summary: Make metaspace::contains be lock free and used to see if something is in metaspace, also compare Method* with vtbl pointer.
Reviewed-by: dholmes, sspitsyn, dcubed, jmasa

duke@435	1	/*
jprovino@4165	2	* Copyright (c) 2003, 2012, 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
duke@435	25	// JvmtiTagMap
duke@435	26
stefank@2314	27	#ifndef SHARE_VM_PRIMS_JVMTITAGMAP_HPP
stefank@2314	28	#define SHARE_VM_PRIMS_JVMTITAGMAP_HPP
stefank@2314	29
stefank@2314	30	#ifndef JVMTI_KERNEL
stefank@2314	31	#include "gc_interface/collectedHeap.hpp"
stefank@2314	32	#include "jvmtifiles/jvmti.h"
stefank@2314	33	#include "jvmtifiles/jvmtiEnv.hpp"
stefank@2314	34	#include "memory/allocation.hpp"
stefank@2314	35	#include "memory/genCollectedHeap.hpp"
stefank@2314	36	#include "memory/universe.hpp"
stefank@2314	37	#endif
duke@435	38
duke@435	39	// forward references
duke@435	40	class JvmtiTagHashmap;
duke@435	41	class JvmtiTagHashmapEntry;
duke@435	42	class JvmtiTagHashmapEntryClosure;
duke@435	43
zgu@3900	44	class JvmtiTagMap : public CHeapObj<mtInternal> {
duke@435	45	private:
duke@435	46
duke@435	47	enum{
kamg@2445	48	max_free_entries = 4096 // maximum number of free entries per env
duke@435	49	};
duke@435	50
duke@435	51	JvmtiEnv* _env; // the jvmti environment
duke@435	52	Mutex _lock; // lock for this tag map
kamg@2445	53	JvmtiTagHashmap* _hashmap; // the hashmap
duke@435	54
duke@435	55	JvmtiTagHashmapEntry* _free_entries; // free list for this environment
duke@435	56	int _free_entries_count; // number of entries on the free list
duke@435	57
duke@435	58	// create a tag map
duke@435	59	JvmtiTagMap(JvmtiEnv* env);
duke@435	60
duke@435	61	// accessors
duke@435	62	inline Mutex* lock() { return &_lock; }
duke@435	63	inline JvmtiEnv* env() const { return _env; }
duke@435	64
kamg@2445	65	void do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f);
duke@435	66
duke@435	67	// iterate over all entries in this tag map
duke@435	68	void entry_iterate(JvmtiTagHashmapEntryClosure* closure);
duke@435	69
duke@435	70	public:
duke@435	71
duke@435	72	// indicates if this tag map is locked
duke@435	73	bool is_locked() { return lock()->is_locked(); }
duke@435	74
kamg@2445	75	JvmtiTagHashmap* hashmap() { return _hashmap; }
duke@435	76
duke@435	77	// create/destroy entries
kamg@2445	78	JvmtiTagHashmapEntry* create_entry(oop ref, jlong tag);
duke@435	79	void destroy_entry(JvmtiTagHashmapEntry* entry);
duke@435	80
duke@435	81	// returns true if the hashmaps are empty
duke@435	82	bool is_empty();
duke@435	83
duke@435	84	// return tag for the given environment
duke@435	85	static JvmtiTagMap* tag_map_for(JvmtiEnv* env);
duke@435	86
duke@435	87	// destroy tag map
duke@435	88	~JvmtiTagMap();
duke@435	89
duke@435	90	// set/get tag
duke@435	91	void set_tag(jobject obj, jlong tag);
duke@435	92	jlong get_tag(jobject obj);
duke@435	93
duke@435	94	// deprecated heap iteration functions
duke@435	95	void iterate_over_heap(jvmtiHeapObjectFilter object_filter,
duke@435	96	KlassHandle klass,
duke@435	97	jvmtiHeapObjectCallback heap_object_callback,
duke@435	98	const void* user_data);
duke@435	99
duke@435	100	void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,
duke@435	101	jvmtiStackReferenceCallback stack_ref_callback,
duke@435	102	jvmtiObjectReferenceCallback object_ref_callback,
duke@435	103	const void* user_data);
duke@435	104
duke@435	105	void iterate_over_objects_reachable_from_object(jobject object,
duke@435	106	jvmtiObjectReferenceCallback object_reference_callback,
duke@435	107	const void* user_data);
duke@435	108
duke@435	109
duke@435	110	// advanced (JVMTI 1.1) heap iteration functions
duke@435	111	void iterate_through_heap(jint heap_filter,
duke@435	112	KlassHandle klass,
duke@435	113	const jvmtiHeapCallbacks* callbacks,
duke@435	114	const void* user_data);
duke@435	115
duke@435	116	void follow_references(jint heap_filter,
duke@435	117	KlassHandle klass,
duke@435	118	jobject initial_object,
duke@435	119	const jvmtiHeapCallbacks* callbacks,
duke@435	120	const void* user_data);
duke@435	121
duke@435	122	// get tagged objects
duke@435	123	jvmtiError get_objects_with_tags(const jlong* tags, jint count,
duke@435	124	jint* count_ptr, jobject** object_result_ptr,
duke@435	125	jlong** tag_result_ptr);
duke@435	126
kamg@2445	127	static void weak_oops_do(
jprovino@4165	128	BoolObjectClosure* is_alive, OopClosure* f) NOT_JVMTI_RETURN;
duke@435	129	};
duke@435	130
stefank@2314	131	#endif // SHARE_VM_PRIMS_JVMTITAGMAP_HPP