Tue, 16 Aug 2016 12:48:43 -0700
Merge
1 /*
2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 // JvmtiTagMap
27 #ifndef SHARE_VM_PRIMS_JVMTITAGMAP_HPP
28 #define SHARE_VM_PRIMS_JVMTITAGMAP_HPP
30 #include "gc_interface/collectedHeap.hpp"
31 #include "jvmtifiles/jvmti.h"
32 #include "jvmtifiles/jvmtiEnv.hpp"
33 #include "memory/allocation.hpp"
34 #include "memory/genCollectedHeap.hpp"
35 #include "memory/universe.hpp"
37 // forward references
38 class JvmtiTagHashmap;
39 class JvmtiTagHashmapEntry;
40 class JvmtiTagHashmapEntryClosure;
42 class JvmtiTagMap : public CHeapObj<mtInternal> {
43 private:
45 enum{
46 max_free_entries = 4096 // maximum number of free entries per env
47 };
49 JvmtiEnv* _env; // the jvmti environment
50 Mutex _lock; // lock for this tag map
51 JvmtiTagHashmap* _hashmap; // the hashmap
53 JvmtiTagHashmapEntry* _free_entries; // free list for this environment
54 int _free_entries_count; // number of entries on the free list
56 // create a tag map
57 JvmtiTagMap(JvmtiEnv* env);
59 // accessors
60 inline Mutex* lock() { return &_lock; }
61 inline JvmtiEnv* env() const { return _env; }
63 void do_weak_oops(BoolObjectClosure* is_alive, OopClosure* f);
65 // iterate over all entries in this tag map
66 void entry_iterate(JvmtiTagHashmapEntryClosure* closure);
68 public:
70 // indicates if this tag map is locked
71 bool is_locked() { return lock()->is_locked(); }
73 JvmtiTagHashmap* hashmap() { return _hashmap; }
75 // create/destroy entries
76 JvmtiTagHashmapEntry* create_entry(oop ref, jlong tag);
77 void destroy_entry(JvmtiTagHashmapEntry* entry);
79 // returns true if the hashmaps are empty
80 bool is_empty();
82 // return tag for the given environment
83 static JvmtiTagMap* tag_map_for(JvmtiEnv* env);
85 // destroy tag map
86 ~JvmtiTagMap();
88 // set/get tag
89 void set_tag(jobject obj, jlong tag);
90 jlong get_tag(jobject obj);
92 // deprecated heap iteration functions
93 void iterate_over_heap(jvmtiHeapObjectFilter object_filter,
94 KlassHandle klass,
95 jvmtiHeapObjectCallback heap_object_callback,
96 const void* user_data);
98 void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,
99 jvmtiStackReferenceCallback stack_ref_callback,
100 jvmtiObjectReferenceCallback object_ref_callback,
101 const void* user_data);
103 void iterate_over_objects_reachable_from_object(jobject object,
104 jvmtiObjectReferenceCallback object_reference_callback,
105 const void* user_data);
108 // advanced (JVMTI 1.1) heap iteration functions
109 void iterate_through_heap(jint heap_filter,
110 KlassHandle klass,
111 const jvmtiHeapCallbacks* callbacks,
112 const void* user_data);
114 void follow_references(jint heap_filter,
115 KlassHandle klass,
116 jobject initial_object,
117 const jvmtiHeapCallbacks* callbacks,
118 const void* user_data);
120 // get tagged objects
121 jvmtiError get_objects_with_tags(const jlong* tags, jint count,
122 jint* count_ptr, jobject** object_result_ptr,
123 jlong** tag_result_ptr);
125 static void weak_oops_do(
126 BoolObjectClosure* is_alive, OopClosure* f) NOT_JVMTI_RETURN;
127 };
129 #endif // SHARE_VM_PRIMS_JVMTITAGMAP_HPP