1
|
1 |
/*
|
|
2 |
* Copyright 2003-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 |
* CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 |
* have any questions.
|
|
22 |
*
|
|
23 |
*/
|
|
24 |
|
|
25 |
// JvmtiTagMap
|
|
26 |
|
|
27 |
#ifndef _JAVA_JVMTI_TAG_MAP_H_
|
|
28 |
#define _JAVA_JVMTI_TAG_MAP_H_
|
|
29 |
|
|
30 |
// forward references
|
|
31 |
class JvmtiTagHashmap;
|
|
32 |
class JvmtiTagHashmapEntry;
|
|
33 |
class JvmtiTagHashmapEntryClosure;
|
|
34 |
|
|
35 |
class JvmtiTagMap : public CHeapObj {
|
|
36 |
private:
|
|
37 |
|
|
38 |
enum{
|
|
39 |
n_hashmaps = 2, // encapsulates 2 hashmaps
|
|
40 |
max_free_entries = 4096 // maximum number of free entries per env
|
|
41 |
};
|
|
42 |
|
|
43 |
// memory region for young generation
|
|
44 |
static MemRegion _young_gen;
|
|
45 |
static void get_young_generation();
|
|
46 |
|
|
47 |
JvmtiEnv* _env; // the jvmti environment
|
|
48 |
Mutex _lock; // lock for this tag map
|
|
49 |
JvmtiTagHashmap* _hashmap[n_hashmaps]; // the hashmaps
|
|
50 |
|
|
51 |
JvmtiTagHashmapEntry* _free_entries; // free list for this environment
|
|
52 |
int _free_entries_count; // number of entries on the free list
|
|
53 |
|
|
54 |
// create a tag map
|
|
55 |
JvmtiTagMap(JvmtiEnv* env);
|
|
56 |
|
|
57 |
// accessors
|
|
58 |
inline Mutex* lock() { return &_lock; }
|
|
59 |
inline JvmtiEnv* env() const { return _env; }
|
|
60 |
|
|
61 |
// rehash tags maps for generation start to end
|
|
62 |
void rehash(int start, int end);
|
|
63 |
|
|
64 |
// indicates if the object is in the young generation
|
|
65 |
static bool is_in_young(oop o);
|
|
66 |
|
|
67 |
// iterate over all entries in this tag map
|
|
68 |
void entry_iterate(JvmtiTagHashmapEntryClosure* closure);
|
|
69 |
|
|
70 |
public:
|
|
71 |
|
|
72 |
// indicates if this tag map is locked
|
|
73 |
bool is_locked() { return lock()->is_locked(); }
|
|
74 |
|
|
75 |
// return the appropriate hashmap for a given object
|
|
76 |
JvmtiTagHashmap* hashmap_for(oop o);
|
|
77 |
|
|
78 |
// create/destroy entries
|
|
79 |
JvmtiTagHashmapEntry* create_entry(jweak ref, jlong tag);
|
|
80 |
void destroy_entry(JvmtiTagHashmapEntry* entry);
|
|
81 |
|
|
82 |
// returns true if the hashmaps are empty
|
|
83 |
bool is_empty();
|
|
84 |
|
|
85 |
// return tag for the given environment
|
|
86 |
static JvmtiTagMap* tag_map_for(JvmtiEnv* env);
|
|
87 |
|
|
88 |
// destroy tag map
|
|
89 |
~JvmtiTagMap();
|
|
90 |
|
|
91 |
// set/get tag
|
|
92 |
void set_tag(jobject obj, jlong tag);
|
|
93 |
jlong get_tag(jobject obj);
|
|
94 |
|
|
95 |
// deprecated heap iteration functions
|
|
96 |
void iterate_over_heap(jvmtiHeapObjectFilter object_filter,
|
|
97 |
KlassHandle klass,
|
|
98 |
jvmtiHeapObjectCallback heap_object_callback,
|
|
99 |
const void* user_data);
|
|
100 |
|
|
101 |
void iterate_over_reachable_objects(jvmtiHeapRootCallback heap_root_callback,
|
|
102 |
jvmtiStackReferenceCallback stack_ref_callback,
|
|
103 |
jvmtiObjectReferenceCallback object_ref_callback,
|
|
104 |
const void* user_data);
|
|
105 |
|
|
106 |
void iterate_over_objects_reachable_from_object(jobject object,
|
|
107 |
jvmtiObjectReferenceCallback object_reference_callback,
|
|
108 |
const void* user_data);
|
|
109 |
|
|
110 |
|
|
111 |
// advanced (JVMTI 1.1) heap iteration functions
|
|
112 |
void iterate_through_heap(jint heap_filter,
|
|
113 |
KlassHandle klass,
|
|
114 |
const jvmtiHeapCallbacks* callbacks,
|
|
115 |
const void* user_data);
|
|
116 |
|
|
117 |
void follow_references(jint heap_filter,
|
|
118 |
KlassHandle klass,
|
|
119 |
jobject initial_object,
|
|
120 |
const jvmtiHeapCallbacks* callbacks,
|
|
121 |
const void* user_data);
|
|
122 |
|
|
123 |
// get tagged objects
|
|
124 |
jvmtiError get_objects_with_tags(const jlong* tags, jint count,
|
|
125 |
jint* count_ptr, jobject** object_result_ptr,
|
|
126 |
jlong** tag_result_ptr);
|
|
127 |
|
|
128 |
// call post-GC to rehash the tag maps.
|
|
129 |
static void gc_epilogue(bool full);
|
|
130 |
|
|
131 |
// call after referencing processing has completed (CMS)
|
|
132 |
static void cms_ref_processing_epilogue();
|
|
133 |
};
|
|
134 |
|
|
135 |
#endif /* _JAVA_JVMTI_TAG_MAP_H_ */
|