Mercurial > hg > graal-compiler
annotate src/share/vm/oops/klass.hpp @ 7046:b6a8f2d23057
VM support for deferred reads and writes: ScopeDesc, DebugInfo, DebugInfoRecorder
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 27 Nov 2012 13:43:04 +0100 |
parents | 8c4b757c2eb9 |
children | 9ba90252ce08 |
rev | line source |
---|---|
0 | 1 /* |
5972
9a9bb0010c91
7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents:
4860
diff
changeset
|
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_KLASS_HPP |
26 #define SHARE_VM_OOPS_KLASS_HPP | |
27 | |
28 #include "memory/genOopClosures.hpp" | |
29 #include "memory/iterator.hpp" | |
30 #include "memory/memRegion.hpp" | |
31 #include "memory/specialized_oop_closures.hpp" | |
32 #include "oops/klassPS.hpp" | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
33 #include "oops/metadata.hpp" |
1972 | 34 #include "oops/oop.hpp" |
35 #include "runtime/orderAccess.hpp" | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
36 #include "trace/traceMacros.hpp" |
1972 | 37 #include "utilities/accessFlags.hpp" |
38 #ifndef SERIALGC | |
39 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp" | |
40 #include "gc_implementation/g1/g1OopClosures.hpp" | |
41 #include "gc_implementation/parNew/parOopClosures.hpp" | |
42 #endif | |
43 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
44 // |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
45 // A Klass provides: |
0 | 46 // 1: language level class object (method dictionary etc.) |
47 // 2: provide vm dispatch behavior for the object | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
48 // Both functions are combined into one C++ class. |
0 | 49 |
50 // One reason for the oop/klass dichotomy in the implementation is | |
51 // that we don't want a C++ vtbl pointer in every object. Thus, | |
52 // normal oops don't have any virtual functions. Instead, they | |
53 // forward all "virtual" functions to their klass, which does have | |
54 // a vtbl and does the C++ dispatch depending on the object's | |
55 // actual type. (See oop.inline.hpp for some of the forwarding code.) | |
56 // ALL FUNCTIONS IMPLEMENTING THIS DISPATCH ARE PREFIXED WITH "oop_"! | |
57 | |
58 // Klass layout: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
59 // [C++ vtbl ptr ] (contained in Metadata) |
0 | 60 // [layout_helper ] |
61 // [super_check_offset ] for fast subtype checks | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
62 // [name ] |
0 | 63 // [secondary_super_cache] for fast subtype checks |
64 // [secondary_supers ] array of 2ndary supertypes | |
65 // [primary_supers 0] | |
66 // [primary_supers 1] | |
67 // [primary_supers 2] | |
68 // ... | |
69 // [primary_supers 7] | |
70 // [java_mirror ] | |
71 // [super ] | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
72 // [subklass ] first subclass |
0 | 73 // [next_sibling ] link to chain additional subklasses |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
74 // [next_link ] |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
75 // [class_loader_data] |
0 | 76 // [modifier_flags] |
77 // [access_flags ] | |
78 // [verify_count ] - not in product | |
79 // [alloc_count ] | |
80 // [last_biased_lock_bulk_revocation_time] (64 bits) | |
81 // [prototype_header] | |
82 // [biased_lock_revocation_count] | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
83 // [_modified_oops] |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
84 // [_accumulated_modified_oops] |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
85 // [trace_id] |
0 | 86 |
87 | |
88 // Forward declarations. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
89 template <class T> class Array; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
90 template <class T> class GrowableArray; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
91 class ClassLoaderData; |
0 | 92 class klassVtable; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
93 class ParCompactionManager; |
0 | 94 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
95 class Klass : public Metadata { |
0 | 96 friend class VMStructs; |
97 protected: | |
98 // note: put frequently-used fields together at start of klass structure | |
99 // for better cache behavior (may not make much of a difference but sure won't hurt) | |
100 enum { _primary_super_limit = 8 }; | |
101 | |
102 // The "layout helper" is a combined descriptor of object layout. | |
103 // For klasses which are neither instance nor array, the value is zero. | |
104 // | |
105 // For instances, layout helper is a positive number, the instance size. | |
106 // This size is already passed through align_object_size and scaled to bytes. | |
107 // The low order bit is set if instances of this class cannot be | |
108 // allocated using the fastpath. | |
109 // | |
110 // For arrays, layout helper is a negative number, containing four | |
111 // distinct bytes, as follows: | |
112 // MSB:[tag, hsz, ebt, log2(esz)]:LSB | |
113 // where: | |
114 // tag is 0x80 if the elements are oops, 0xC0 if non-oops | |
115 // hsz is array header size in bytes (i.e., offset of first element) | |
116 // ebt is the BasicType of the elements | |
117 // esz is the element size in bytes | |
118 // This packed word is arranged so as to be quickly unpacked by the | |
119 // various fast paths that use the various subfields. | |
120 // | |
121 // The esz bits can be used directly by a SLL instruction, without masking. | |
122 // | |
123 // Note that the array-kind tag looks like 0x00 for instance klasses, | |
124 // since their length in bytes is always less than 24Mb. | |
125 // | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
126 // Final note: This comes first, immediately after C++ vtable, |
0 | 127 // because it is frequently queried. |
128 jint _layout_helper; | |
129 | |
130 // The fields _super_check_offset, _secondary_super_cache, _secondary_supers | |
131 // and _primary_supers all help make fast subtype checks. See big discussion | |
132 // in doc/server_compiler/checktype.txt | |
133 // | |
134 // Where to look to observe a supertype (it is &_secondary_super_cache for | |
135 // secondary supers, else is &_primary_supers[depth()]. | |
136 juint _super_check_offset; | |
137 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
138 // Class name. Instance classes: java/lang/String, etc. Array classes: [I, |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
139 // [Ljava/lang/String;, etc. Set to zero for all other kinds of classes. |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
140 Symbol* _name; |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
141 |
0 | 142 // Cache of last observed secondary supertype |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
143 Klass* _secondary_super_cache; |
0 | 144 // Array of all secondary supertypes |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
145 Array<Klass*>* _secondary_supers; |
0 | 146 // Ordered list of all primary supertypes |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
147 Klass* _primary_supers[_primary_super_limit]; |
0 | 148 // java/lang/Class instance mirroring this class |
149 oop _java_mirror; | |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
150 #ifdef GRAAL |
5554
70f715dfbb41
Bring Java renamings and restructurings to the C++ part.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
5062
diff
changeset
|
151 // com/oracle/graal/hotspot/HotSpotResolvedJavaType mirroring this class |
2891
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2874
diff
changeset
|
152 oop _graal_mirror; |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
153 #endif |
0 | 154 // Superclass |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
155 Klass* _super; |
0 | 156 // First subclass (NULL if none); _subklass->next_sibling() is next one |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
157 Klass* _subklass; |
0 | 158 // Sibling link (or NULL); links all subklasses of a klass |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
159 Klass* _next_sibling; |
0 | 160 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
161 // All klasses loaded by a class loader are chained through these links |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
162 Klass* _next_link; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
163 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
164 // The VM's representation of the ClassLoader used to load this class. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
165 // Provide access the corresponding instance java.lang.ClassLoader. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
166 ClassLoaderData* _class_loader_data; |
0 | 167 |
168 jint _modifier_flags; // Processed access flags, for use by Class.getModifiers. | |
169 AccessFlags _access_flags; // Access flags. The class/interface distinction is stored here. | |
170 | |
171 #ifndef PRODUCT | |
172 int _verify_count; // to avoid redundant verifies | |
173 #endif | |
174 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
175 juint _alloc_count; // allocation profiling support |
0 | 176 |
177 // Biased locking implementation and statistics | |
178 // (the 64-bit chunk goes first, to avoid some fragmentation) | |
179 jlong _last_biased_lock_bulk_revocation_time; | |
180 markOop _prototype_header; // Used when biased locking is both enabled and disabled for this type | |
181 jint _biased_lock_revocation_count; | |
182 | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
183 TRACE_DEFINE_KLASS_TRACE_ID; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
184 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
185 // Remembered sets support for the oops in the klasses. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
186 jbyte _modified_oops; // Card Table Equivalent (YC/CMS support) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
187 jbyte _accumulated_modified_oops; // Mod Union Equivalent (CMS support) |
0 | 188 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
189 // Constructor |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
190 Klass(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
191 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
192 void* operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS); |
0 | 193 |
194 public: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
195 bool is_klass() const volatile { return true; } |
0 | 196 |
197 // super | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
198 Klass* super() const { return _super; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
199 void set_super(Klass* k) { _super = k; } |
0 | 200 |
201 // initializes _super link, _primary_supers & _secondary_supers arrays | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
202 void initialize_supers(Klass* k, TRAPS); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
203 void initialize_supers_impl1(Klass* k); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
204 void initialize_supers_impl2(Klass* k); |
0 | 205 |
206 // klass-specific helper for initializing _secondary_supers | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
207 virtual GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
0 | 208 |
209 // java_super is the Java-level super type as specified by Class.getSuperClass. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
210 virtual Klass* java_super() const { return NULL; } |
0 | 211 |
212 juint super_check_offset() const { return _super_check_offset; } | |
213 void set_super_check_offset(juint o) { _super_check_offset = o; } | |
214 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
215 Klass* secondary_super_cache() const { return _secondary_super_cache; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
216 void set_secondary_super_cache(Klass* k) { _secondary_super_cache = k; } |
0 | 217 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
218 Array<Klass*>* secondary_supers() const { return _secondary_supers; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
219 void set_secondary_supers(Array<Klass*>* k) { _secondary_supers = k; } |
0 | 220 |
221 // Return the element of the _super chain of the given depth. | |
222 // If there is no such element, return either NULL or this. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
223 Klass* primary_super_of_depth(juint i) const { |
0 | 224 assert(i < primary_super_limit(), "oob"); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
225 Klass* super = _primary_supers[i]; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
226 assert(super == NULL || super->super_depth() == i, "correct display"); |
0 | 227 return super; |
228 } | |
229 | |
230 // Can this klass be a primary super? False for interfaces and arrays of | |
231 // interfaces. False also for arrays or classes with long super chains. | |
232 bool can_be_primary_super() const { | |
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
233 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
0 | 234 return super_check_offset() != secondary_offset; |
235 } | |
236 virtual bool can_be_primary_super_slow() const; | |
237 | |
238 // Returns number of primary supers; may be a number in the inclusive range [0, primary_super_limit]. | |
239 juint super_depth() const { | |
240 if (!can_be_primary_super()) { | |
241 return primary_super_limit(); | |
242 } else { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
243 juint d = (super_check_offset() - in_bytes(primary_supers_offset())) / sizeof(Klass*); |
0 | 244 assert(d < primary_super_limit(), "oob"); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
245 assert(_primary_supers[d] == this, "proper init"); |
0 | 246 return d; |
247 } | |
248 } | |
249 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
250 // store an oop into a field of a Klass |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
251 void klass_oop_store(oop* p, oop v); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
252 void klass_oop_store(volatile oop* p, oop v); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
253 |
0 | 254 // java mirror |
255 oop java_mirror() const { return _java_mirror; } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
256 void set_java_mirror(oop m) { klass_oop_store(&_java_mirror, m); } |
0 | 257 |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
258 #ifdef GRAAL |
2891
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2874
diff
changeset
|
259 // graal mirror |
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2874
diff
changeset
|
260 oop graal_mirror() const { return _graal_mirror; } |
75a99b4f1c98
Rebranded C++ part from C1X to Graal.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2874
diff
changeset
|
261 void set_graal_mirror(oop m) { oop_store((oop*) &_graal_mirror, m); } |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
262 #endif |
1941
79d04223b8a5
Added caching for resolved types and resolved fields.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1681
diff
changeset
|
263 |
0 | 264 // modifier flags |
265 jint modifier_flags() const { return _modifier_flags; } | |
266 void set_modifier_flags(jint flags) { _modifier_flags = flags; } | |
267 | |
268 // size helper | |
269 int layout_helper() const { return _layout_helper; } | |
270 void set_layout_helper(int lh) { _layout_helper = lh; } | |
271 | |
272 // Note: for instances layout_helper() may include padding. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
273 // Use InstanceKlass::contains_field_offset to classify field offsets. |
0 | 274 |
275 // sub/superklass links | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
276 InstanceKlass* superklass() const; |
0 | 277 Klass* subklass() const; |
278 Klass* next_sibling() const; | |
279 void append_to_sibling_list(); // add newly created receiver to superklass' subklass list | |
280 void remove_from_sibling_list(); // remove receiver from sibling list | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
281 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
282 void set_next_link(Klass* k) { _next_link = k; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
283 Klass* next_link() const { return _next_link; } // The next klass defined by the class loader. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
284 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
285 // class loader data |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
286 ClassLoaderData* class_loader_data() const { return _class_loader_data; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
287 void set_class_loader_data(ClassLoaderData* loader_data) { _class_loader_data = loader_data; } |
0 | 288 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
289 // The Klasses are not placed in the Heap, so the Card Table or |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
290 // the Mod Union Table can't be used to mark when klasses have modified oops. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
291 // The CT and MUT bits saves this information for the individual Klasses. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
292 void record_modified_oops() { _modified_oops = 1; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
293 void clear_modified_oops() { _modified_oops = 0; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
294 bool has_modified_oops() { return _modified_oops == 1; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
295 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
296 void accumulate_modified_oops() { if (has_modified_oops()) _accumulated_modified_oops = 1; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
297 void clear_accumulated_modified_oops() { _accumulated_modified_oops = 0; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
298 bool has_accumulated_modified_oops() { return _accumulated_modified_oops == 1; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
299 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
300 protected: // internal accessors |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
301 Klass* subklass_oop() const { return _subklass; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
302 Klass* next_sibling_oop() const { return _next_sibling; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
303 void set_subklass(Klass* s); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
304 void set_next_sibling(Klass* s); |
0 | 305 |
306 public: | |
307 // Allocation profiling support | |
308 juint alloc_count() const { return _alloc_count; } | |
309 void set_alloc_count(juint n) { _alloc_count = n; } | |
310 virtual juint alloc_size() const = 0; | |
311 virtual void set_alloc_size(juint n) = 0; | |
312 | |
313 // Compiler support | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
314 static ByteSize super_offset() { return in_ByteSize(offset_of(Klass, _super)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
315 static ByteSize super_check_offset_offset() { return in_ByteSize(offset_of(Klass, _super_check_offset)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
316 static ByteSize primary_supers_offset() { return in_ByteSize(offset_of(Klass, _primary_supers)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
317 static ByteSize secondary_super_cache_offset() { return in_ByteSize(offset_of(Klass, _secondary_super_cache)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
318 static ByteSize secondary_supers_offset() { return in_ByteSize(offset_of(Klass, _secondary_supers)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
319 static ByteSize java_mirror_offset() { return in_ByteSize(offset_of(Klass, _java_mirror)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
320 static ByteSize modifier_flags_offset() { return in_ByteSize(offset_of(Klass, _modifier_flags)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
321 static ByteSize layout_helper_offset() { return in_ByteSize(offset_of(Klass, _layout_helper)); } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
322 static ByteSize access_flags_offset() { return in_ByteSize(offset_of(Klass, _access_flags)); } |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
323 #ifdef GRAAL |
6948
e522a00b91aa
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/ after NPG - C++ build works
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
324 static ByteSize graal_mirror_offset() { return in_ByteSize(offset_of(Klass, _graal_mirror)); } |
7036
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
325 static ByteSize next_sibling_offset() { return in_ByteSize(offset_of(Klass, _next_sibling)); } |
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
326 static ByteSize subklass_offset() { return in_ByteSize(offset_of(Klass, _subklass)); } |
8c4b757c2eb9
added more #ifdefs for GRAAL specific code
Doug Simon <doug.simon@oracle.com>
parents:
6988
diff
changeset
|
327 #endif |
0 | 328 |
329 // Unpacking layout_helper: | |
330 enum { | |
331 _lh_neutral_value = 0, // neutral non-array non-instance value | |
332 _lh_instance_slow_path_bit = 0x01, | |
333 _lh_log2_element_size_shift = BitsPerByte*0, | |
334 _lh_log2_element_size_mask = BitsPerLong-1, | |
335 _lh_element_type_shift = BitsPerByte*1, | |
336 _lh_element_type_mask = right_n_bits(BitsPerByte), // shifted mask | |
337 _lh_header_size_shift = BitsPerByte*2, | |
338 _lh_header_size_mask = right_n_bits(BitsPerByte), // shifted mask | |
339 _lh_array_tag_bits = 2, | |
340 _lh_array_tag_shift = BitsPerInt - _lh_array_tag_bits, | |
341 _lh_array_tag_type_value = ~0x00, // 0xC0000000 >> 30 | |
342 _lh_array_tag_obj_value = ~0x01 // 0x80000000 >> 30 | |
343 }; | |
344 | |
345 static int layout_helper_size_in_bytes(jint lh) { | |
346 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
347 return (int) lh & ~_lh_instance_slow_path_bit; | |
348 } | |
349 static bool layout_helper_needs_slow_path(jint lh) { | |
350 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
351 return (lh & _lh_instance_slow_path_bit) != 0; | |
352 } | |
353 static bool layout_helper_is_instance(jint lh) { | |
354 return (jint)lh > (jint)_lh_neutral_value; | |
355 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
356 static bool layout_helper_is_array(jint lh) { |
0 | 357 return (jint)lh < (jint)_lh_neutral_value; |
358 } | |
359 static bool layout_helper_is_typeArray(jint lh) { | |
360 // _lh_array_tag_type_value == (lh >> _lh_array_tag_shift); | |
361 return (juint)lh >= (juint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
362 } | |
363 static bool layout_helper_is_objArray(jint lh) { | |
364 // _lh_array_tag_obj_value == (lh >> _lh_array_tag_shift); | |
365 return (jint)lh < (jint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
366 } | |
367 static int layout_helper_header_size(jint lh) { | |
368 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
369 int hsize = (lh >> _lh_header_size_shift) & _lh_header_size_mask; | |
370 assert(hsize > 0 && hsize < (int)sizeof(oopDesc)*3, "sanity"); | |
371 return hsize; | |
372 } | |
373 static BasicType layout_helper_element_type(jint lh) { | |
374 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
375 int btvalue = (lh >> _lh_element_type_shift) & _lh_element_type_mask; | |
376 assert(btvalue >= T_BOOLEAN && btvalue <= T_OBJECT, "sanity"); | |
377 return (BasicType) btvalue; | |
378 } | |
379 static int layout_helper_log2_element_size(jint lh) { | |
380 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
381 int l2esz = (lh >> _lh_log2_element_size_shift) & _lh_log2_element_size_mask; | |
382 assert(l2esz <= LogBitsPerLong, "sanity"); | |
383 return l2esz; | |
384 } | |
385 static jint array_layout_helper(jint tag, int hsize, BasicType etype, int log2_esize) { | |
386 return (tag << _lh_array_tag_shift) | |
387 | (hsize << _lh_header_size_shift) | |
388 | ((int)etype << _lh_element_type_shift) | |
389 | (log2_esize << _lh_log2_element_size_shift); | |
390 } | |
391 static jint instance_layout_helper(jint size, bool slow_path_flag) { | |
392 return (size << LogHeapWordSize) | |
393 | (slow_path_flag ? _lh_instance_slow_path_bit : 0); | |
394 } | |
395 static int layout_helper_to_size_helper(jint lh) { | |
396 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
397 // Note that the following expression discards _lh_instance_slow_path_bit. | |
398 return lh >> LogHeapWordSize; | |
399 } | |
400 // Out-of-line version computes everything based on the etype: | |
401 static jint array_layout_helper(BasicType etype); | |
402 | |
403 // What is the maximum number of primary superclasses any klass can have? | |
404 #ifdef PRODUCT | |
405 static juint primary_super_limit() { return _primary_super_limit; } | |
406 #else | |
407 static juint primary_super_limit() { | |
408 assert(FastSuperclassLimit <= _primary_super_limit, "parameter oob"); | |
409 return FastSuperclassLimit; | |
410 } | |
411 #endif | |
412 | |
413 // vtables | |
414 virtual klassVtable* vtable() const { return NULL; } | |
415 | |
416 // subclass check | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
417 bool is_subclass_of(Klass* k) const; |
0 | 418 // subtype check: true if is_subclass_of, or if k is interface and receiver implements it |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
419 bool is_subtype_of(Klass* k) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
420 juint off = k->super_check_offset(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
421 Klass* sup = *(Klass**)( (address)this + off ); |
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
422 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
0 | 423 if (sup == k) { |
424 return true; | |
425 } else if (off != secondary_offset) { | |
426 return false; | |
427 } else { | |
428 return search_secondary_supers(k); | |
429 } | |
430 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
431 bool search_secondary_supers(Klass* k) const; |
0 | 432 |
605 | 433 // Find LCA in class hierarchy |
0 | 434 Klass *LCA( Klass *k ); |
435 | |
436 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
437 // if not, throw either an Error or an Exception. | |
438 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
439 | |
440 // array copying | |
441 virtual void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); | |
442 | |
443 // tells if the class should be initialized | |
444 virtual bool should_be_initialized() const { return false; } | |
445 // initializes the klass | |
446 virtual void initialize(TRAPS); | |
447 // lookup operation for MethodLookupCache | |
448 friend class MethodLookupCache; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
449 virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
0 | 450 public: |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
451 Method* lookup_method(Symbol* name, Symbol* signature) const { |
0 | 452 return uncached_lookup_method(name, signature); |
453 } | |
454 | |
455 // array class with specific rank | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
456 Klass* array_klass(int rank, TRAPS) { return array_klass_impl(false, rank, THREAD); } |
0 | 457 |
458 // array class with this klass as element type | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
459 Klass* array_klass(TRAPS) { return array_klass_impl(false, THREAD); } |
0 | 460 |
461 // These will return NULL instead of allocating on the heap: | |
462 // NB: these can block for a mutex, like other functions with TRAPS arg. | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
463 Klass* array_klass_or_null(int rank); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
464 Klass* array_klass_or_null(); |
0 | 465 |
466 virtual oop protection_domain() { return NULL; } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
467 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
468 oop class_loader() const; |
0 | 469 |
470 protected: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
471 virtual Klass* array_klass_impl(bool or_null, int rank, TRAPS); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
472 virtual Klass* array_klass_impl(bool or_null, TRAPS); |
0 | 473 |
474 public: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
475 // CDS support - remove and restore oops from metadata. Oops are not shared. |
0 | 476 virtual void remove_unshareable_info(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
477 virtual void restore_unshareable_info(TRAPS); |
0 | 478 |
479 protected: | |
480 // computes the subtype relationship | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
481 virtual bool compute_is_subtype_of(Klass* k); |
0 | 482 public: |
483 // ALL FUNCTIONS BELOW THIS POINT ARE DISPATCHED FROM AN OOP | |
484 // These functions describe behavior for the oop not the KLASS. | |
485 | |
486 // actual oop size of obj in memory | |
487 virtual int oop_size(oop obj) const = 0; | |
488 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
489 // Size of klass in word size. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
490 virtual int size() const = 0; |
0 | 491 |
492 // Returns the Java name for a class (Resource allocated) | |
493 // For arrays, this returns the name of the element with a leading '['. | |
494 // For classes, this returns the name with the package separators | |
495 // turned into '.'s. | |
496 const char* external_name() const; | |
497 // Returns the name for a class (Resource allocated) as the class | |
498 // would appear in a signature. | |
499 // For arrays, this returns the name of the element with a leading '['. | |
500 // For classes, this returns the name with a leading 'L' and a trailing ';' | |
501 // and the package separators as '/'. | |
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
628
diff
changeset
|
502 virtual const char* signature_name() const; |
0 | 503 |
504 // garbage collection support | |
505 virtual void oop_follow_contents(oop obj) = 0; | |
506 virtual int oop_adjust_pointers(oop obj) = 0; | |
507 | |
508 // Parallel Scavenge and Parallel Old | |
509 PARALLEL_GC_DECLS_PV | |
510 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
511 // type testing operations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
512 protected: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
513 virtual bool oop_is_instance_slow() const { return false; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
514 virtual bool oop_is_array_slow() const { return false; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
515 virtual bool oop_is_objArray_slow() const { return false; } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
516 virtual bool oop_is_typeArray_slow() const { return false; } |
0 | 517 public: |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2177
diff
changeset
|
518 virtual bool oop_is_instanceMirror() const { return false; } |
0 | 519 virtual bool oop_is_instanceRef() const { return false; } |
520 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
521 // Fast non-virtual versions |
0 | 522 #ifndef ASSERT |
523 #define assert_same_query(xval, xcheck) xval | |
524 #else | |
525 private: | |
526 static bool assert_same_query(bool xval, bool xslow) { | |
527 assert(xval == xslow, "slow and fast queries agree"); | |
528 return xval; | |
529 } | |
530 public: | |
531 #endif | |
532 inline bool oop_is_instance() const { return assert_same_query( | |
533 layout_helper_is_instance(layout_helper()), | |
534 oop_is_instance_slow()); } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
535 inline bool oop_is_array() const { return assert_same_query( |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
536 layout_helper_is_array(layout_helper()), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
537 oop_is_array_slow()); } |
0 | 538 inline bool oop_is_objArray() const { return assert_same_query( |
539 layout_helper_is_objArray(layout_helper()), | |
540 oop_is_objArray_slow()); } | |
541 inline bool oop_is_typeArray() const { return assert_same_query( | |
542 layout_helper_is_typeArray(layout_helper()), | |
543 oop_is_typeArray_slow()); } | |
544 #undef assert_same_query | |
545 | |
546 // Access flags | |
547 AccessFlags access_flags() const { return _access_flags; } | |
548 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
549 | |
550 bool is_public() const { return _access_flags.is_public(); } | |
551 bool is_final() const { return _access_flags.is_final(); } | |
552 bool is_interface() const { return _access_flags.is_interface(); } | |
553 bool is_abstract() const { return _access_flags.is_abstract(); } | |
554 bool is_super() const { return _access_flags.is_super(); } | |
555 bool is_synthetic() const { return _access_flags.is_synthetic(); } | |
556 void set_is_synthetic() { _access_flags.set_is_synthetic(); } | |
557 bool has_finalizer() const { return _access_flags.has_finalizer(); } | |
558 bool has_final_method() const { return _access_flags.has_final_method(); } | |
559 void set_has_finalizer() { _access_flags.set_has_finalizer(); } | |
560 void set_has_final_method() { _access_flags.set_has_final_method(); } | |
561 bool is_cloneable() const { return _access_flags.is_cloneable(); } | |
562 void set_is_cloneable() { _access_flags.set_is_cloneable(); } | |
563 bool has_vanilla_constructor() const { return _access_flags.has_vanilla_constructor(); } | |
564 void set_has_vanilla_constructor() { _access_flags.set_has_vanilla_constructor(); } | |
565 bool has_miranda_methods () const { return access_flags().has_miranda_methods(); } | |
566 void set_has_miranda_methods() { _access_flags.set_has_miranda_methods(); } | |
567 | |
568 // Biased locking support | |
569 // Note: the prototype header is always set up to be at least the | |
570 // prototype markOop. If biased locking is enabled it may further be | |
571 // biasable and have an epoch. | |
572 markOop prototype_header() const { return _prototype_header; } | |
573 // NOTE: once instances of this klass are floating around in the | |
574 // system, this header must only be updated at a safepoint. | |
575 // NOTE 2: currently we only ever set the prototype header to the | |
576 // biasable prototype for instanceKlasses. There is no technical | |
577 // reason why it could not be done for arrayKlasses aside from | |
578 // wanting to reduce the initial scope of this optimization. There | |
579 // are potential problems in setting the bias pattern for | |
580 // JVM-internal oops. | |
581 inline void set_prototype_header(markOop header); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
582 static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); } |
0 | 583 |
584 int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; } | |
585 // Atomically increments biased_lock_revocation_count and returns updated value | |
586 int atomic_incr_biased_lock_revocation_count(); | |
587 void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; } | |
588 jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; } | |
589 void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; } | |
590 | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
591 TRACE_DEFINE_KLASS_METHODS; |
0 | 592 |
593 // garbage collection support | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
594 virtual void oops_do(OopClosure* cl); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
595 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
596 // Checks if the class loader is alive. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
597 // Iff the class loader is alive the Klass is considered alive. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
598 // The is_alive closure passed in depends on the Garbage Collector used. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
599 bool is_loader_alive(BoolObjectClosure* is_alive); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
600 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
601 static void clean_weak_klass_links(BoolObjectClosure* is_alive); |
0 | 602 |
603 // Prefetch within oop iterators. This is a macro because we | |
604 // can't guarantee that the compiler will inline it. In 64-bit | |
605 // it generally doesn't. Signature is | |
606 // | |
607 // static void prefetch_beyond(oop* const start, | |
608 // oop* const end, | |
609 // const intx foffset, | |
610 // const Prefetch::style pstyle); | |
611 #define prefetch_beyond(start, end, foffset, pstyle) { \ | |
612 const intx foffset_ = (foffset); \ | |
613 const Prefetch::style pstyle_ = (pstyle); \ | |
614 assert(foffset_ > 0, "prefetch beyond, not behind"); \ | |
615 if (pstyle_ != Prefetch::do_none) { \ | |
616 oop* ref = (start); \ | |
617 if (ref < (end)) { \ | |
618 switch (pstyle_) { \ | |
619 case Prefetch::do_read: \ | |
620 Prefetch::read(*ref, foffset_); \ | |
621 break; \ | |
622 case Prefetch::do_write: \ | |
623 Prefetch::write(*ref, foffset_); \ | |
624 break; \ | |
625 default: \ | |
626 ShouldNotReachHere(); \ | |
627 break; \ | |
628 } \ | |
629 } \ | |
630 } \ | |
631 } | |
632 | |
633 // iterators | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
634 virtual int oop_oop_iterate(oop obj, ExtendedOopClosure* blk) = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
635 virtual int oop_oop_iterate_v(oop obj, ExtendedOopClosure* blk) { |
0 | 636 return oop_oop_iterate(obj, blk); |
637 } | |
638 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
639 #ifndef SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
640 // In case we don't have a specialized backward scanner use forward |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
641 // iteration. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
642 virtual int oop_oop_iterate_backwards_v(oop obj, ExtendedOopClosure* blk) { |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
643 return oop_oop_iterate_v(obj, blk); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
644 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
645 #endif // !SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
646 |
0 | 647 // Iterates "blk" over all the oops in "obj" (of type "this") within "mr". |
648 // (I don't see why the _m should be required, but without it the Solaris | |
649 // C++ gives warning messages about overridings of the "oop_oop_iterate" | |
650 // defined above "hiding" this virtual function. (DLD, 6/20/00)) */ | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
651 virtual int oop_oop_iterate_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
652 virtual int oop_oop_iterate_v_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
0 | 653 return oop_oop_iterate_m(obj, blk, mr); |
654 } | |
655 | |
656 // Versions of the above iterators specialized to particular subtypes | |
657 // of OopClosure, to avoid closure virtual calls. | |
658 #define Klass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
659 virtual int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk) { \ | |
660 /* Default implementation reverts to general version. */ \ | |
661 return oop_oop_iterate(obj, blk); \ | |
662 } \ | |
663 \ | |
664 /* Iterates "blk" over all the oops in "obj" (of type "this") within "mr". \ | |
665 (I don't see why the _m should be required, but without it the Solaris \ | |
666 C++ gives warning messages about overridings of the "oop_oop_iterate" \ | |
667 defined above "hiding" this virtual function. (DLD, 6/20/00)) */ \ | |
668 virtual int oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
669 OopClosureType* blk, \ | |
670 MemRegion mr) { \ | |
671 return oop_oop_iterate_m(obj, blk, mr); \ | |
672 } | |
673 | |
674 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(Klass_OOP_OOP_ITERATE_DECL) | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
675 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_2(Klass_OOP_OOP_ITERATE_DECL) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
676 |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
677 #ifndef SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
678 #define Klass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
679 virtual int oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
680 OopClosureType* blk) { \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
681 /* Default implementation reverts to general version. */ \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
682 return oop_oop_iterate_backwards_v(obj, blk); \ |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
683 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
684 |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
685 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_1(Klass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
686 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_2(Klass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
687 #endif // !SERIALGC |
0 | 688 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
689 virtual void array_klasses_do(void f(Klass* k)) {} |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
690 virtual void with_array_klasses_do(void f(Klass* k)); |
0 | 691 |
692 // Return self, except for abstract classes with exactly 1 | |
693 // implementor. Then return the 1 concrete implementation. | |
694 Klass *up_cast_abstract(); | |
695 | |
696 // klass name | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
697 Symbol* name() const { return _name; } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
698 void set_name(Symbol* n); |
0 | 699 |
700 public: | |
701 // jvm support | |
702 virtual jint compute_modifier_flags(TRAPS) const; | |
703 | |
704 // JVMTI support | |
705 virtual jint jvmti_class_status() const; | |
706 | |
707 // Printing | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
708 virtual void print_on(outputStream* st) const; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
709 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1039
diff
changeset
|
710 virtual void oop_print_value_on(oop obj, outputStream* st); |
0 | 711 virtual void oop_print_on (oop obj, outputStream* st); |
712 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
713 virtual const char* internal_name() const = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
714 |
0 | 715 // Verification |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
716 virtual void verify_on(outputStream* st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
717 void verify() { verify_on(tty); } |
0 | 718 |
719 #ifndef PRODUCT | |
720 void verify_vtable_index(int index); | |
721 #endif | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
722 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
723 virtual void oop_verify_on(oop obj, outputStream* st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
724 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
725 private: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
726 // barriers used by klass_oop_store |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
727 void klass_update_barrier_set(oop v); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
728 void klass_update_barrier_set_pre(void* p, oop v); |
0 | 729 }; |
1972 | 730 |
731 #endif // SHARE_VM_OOPS_KLASS_HPP |