Mercurial > hg > truffle
annotate src/share/vm/oops/klass.hpp @ 6862:8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
Summary: Change the type of various task num fields, parameters etc to unsigned and rename them to be more consistent with the other collectors. Code changes were also reviewed by Vitaly Davidovich.
Reviewed-by: johnc
Contributed-by: Kaushik Srenevasan <kaushik@twitter.com>
| author | johnc |
|---|---|
| date | Sat, 06 Oct 2012 01:17:44 -0700 |
| parents | da91efe96a93 |
| children | e522a00b91aa 070d523b96a7 |
| 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; | |
| 150 // Superclass | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
151 Klass* _super; |
| 0 | 152 // 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
|
153 Klass* _subklass; |
| 0 | 154 // 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
|
155 Klass* _next_sibling; |
| 0 | 156 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
157 // 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
|
158 Klass* _next_link; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
159 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
160 // 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
|
161 // Provide access the corresponding instance java.lang.ClassLoader. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
162 ClassLoaderData* _class_loader_data; |
| 0 | 163 |
| 164 jint _modifier_flags; // Processed access flags, for use by Class.getModifiers. | |
| 165 AccessFlags _access_flags; // Access flags. The class/interface distinction is stored here. | |
| 166 | |
| 167 #ifndef PRODUCT | |
| 168 int _verify_count; // to avoid redundant verifies | |
| 169 #endif | |
| 170 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
171 juint _alloc_count; // allocation profiling support |
| 0 | 172 |
| 173 // Biased locking implementation and statistics | |
| 174 // (the 64-bit chunk goes first, to avoid some fragmentation) | |
| 175 jlong _last_biased_lock_bulk_revocation_time; | |
| 176 markOop _prototype_header; // Used when biased locking is both enabled and disabled for this type | |
| 177 jint _biased_lock_revocation_count; | |
| 178 | |
|
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
179 TRACE_DEFINE_KLASS_TRACE_ID; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
180 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
181 // 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
|
182 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
|
183 jbyte _accumulated_modified_oops; // Mod Union Equivalent (CMS support) |
| 0 | 184 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
185 // Constructor |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
186 Klass(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
187 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
188 void* operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS); |
| 0 | 189 |
| 190 public: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
191 bool is_klass() const volatile { return true; } |
| 0 | 192 |
| 193 // super | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
194 Klass* super() const { return _super; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
195 void set_super(Klass* k) { _super = k; } |
| 0 | 196 |
| 197 // 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
|
198 void initialize_supers(Klass* k, TRAPS); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
199 void initialize_supers_impl1(Klass* k); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
200 void initialize_supers_impl2(Klass* k); |
| 0 | 201 |
| 202 // klass-specific helper for initializing _secondary_supers | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
203 virtual GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
| 0 | 204 |
| 205 // 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
|
206 virtual Klass* java_super() const { return NULL; } |
| 0 | 207 |
| 208 juint super_check_offset() const { return _super_check_offset; } | |
| 209 void set_super_check_offset(juint o) { _super_check_offset = o; } | |
| 210 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
211 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
|
212 void set_secondary_super_cache(Klass* k) { _secondary_super_cache = k; } |
| 0 | 213 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
214 Array<Klass*>* secondary_supers() const { return _secondary_supers; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
215 void set_secondary_supers(Array<Klass*>* k) { _secondary_supers = k; } |
| 0 | 216 |
| 217 // Return the element of the _super chain of the given depth. | |
| 218 // 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
|
219 Klass* primary_super_of_depth(juint i) const { |
| 0 | 220 assert(i < primary_super_limit(), "oob"); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
221 Klass* super = _primary_supers[i]; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
222 assert(super == NULL || super->super_depth() == i, "correct display"); |
| 0 | 223 return super; |
| 224 } | |
| 225 | |
| 226 // Can this klass be a primary super? False for interfaces and arrays of | |
| 227 // interfaces. False also for arrays or classes with long super chains. | |
| 228 bool can_be_primary_super() const { | |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
229 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
| 0 | 230 return super_check_offset() != secondary_offset; |
| 231 } | |
| 232 virtual bool can_be_primary_super_slow() const; | |
| 233 | |
| 234 // Returns number of primary supers; may be a number in the inclusive range [0, primary_super_limit]. | |
| 235 juint super_depth() const { | |
| 236 if (!can_be_primary_super()) { | |
| 237 return primary_super_limit(); | |
| 238 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
239 juint d = (super_check_offset() - in_bytes(primary_supers_offset())) / sizeof(Klass*); |
| 0 | 240 assert(d < primary_super_limit(), "oob"); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
241 assert(_primary_supers[d] == this, "proper init"); |
| 0 | 242 return d; |
| 243 } | |
| 244 } | |
| 245 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
246 // 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
|
247 void klass_oop_store(oop* p, oop v); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
248 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
|
249 |
| 0 | 250 // java mirror |
| 251 oop java_mirror() const { return _java_mirror; } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
252 void set_java_mirror(oop m) { klass_oop_store(&_java_mirror, m); } |
| 0 | 253 |
| 254 // modifier flags | |
| 255 jint modifier_flags() const { return _modifier_flags; } | |
| 256 void set_modifier_flags(jint flags) { _modifier_flags = flags; } | |
| 257 | |
| 258 // size helper | |
| 259 int layout_helper() const { return _layout_helper; } | |
| 260 void set_layout_helper(int lh) { _layout_helper = lh; } | |
| 261 | |
| 262 // 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
|
263 // Use InstanceKlass::contains_field_offset to classify field offsets. |
| 0 | 264 |
| 265 // sub/superklass links | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
266 InstanceKlass* superklass() const; |
| 0 | 267 Klass* subklass() const; |
| 268 Klass* next_sibling() const; | |
| 269 void append_to_sibling_list(); // add newly created receiver to superklass' subklass list | |
| 270 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
|
271 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
272 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
|
273 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
|
274 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
275 // class loader data |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
276 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
|
277 void set_class_loader_data(ClassLoaderData* loader_data) { _class_loader_data = loader_data; } |
| 0 | 278 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
279 // 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
|
280 // 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
|
281 // 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
|
282 void record_modified_oops() { _modified_oops = 1; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
283 void clear_modified_oops() { _modified_oops = 0; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
284 bool has_modified_oops() { return _modified_oops == 1; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
285 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
286 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
|
287 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
|
288 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
|
289 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
290 protected: // internal accessors |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
291 Klass* subklass_oop() const { return _subklass; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
292 Klass* next_sibling_oop() const { return _next_sibling; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
293 void set_subklass(Klass* s); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
294 void set_next_sibling(Klass* s); |
| 0 | 295 |
| 296 public: | |
| 297 // Allocation profiling support | |
| 298 juint alloc_count() const { return _alloc_count; } | |
| 299 void set_alloc_count(juint n) { _alloc_count = n; } | |
| 300 virtual juint alloc_size() const = 0; | |
| 301 virtual void set_alloc_size(juint n) = 0; | |
| 302 | |
| 303 // Compiler support | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
304 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
|
305 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
|
306 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
|
307 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
|
308 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
|
309 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
|
310 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
|
311 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
|
312 static ByteSize access_flags_offset() { return in_ByteSize(offset_of(Klass, _access_flags)); } |
| 0 | 313 |
| 314 // Unpacking layout_helper: | |
| 315 enum { | |
| 316 _lh_neutral_value = 0, // neutral non-array non-instance value | |
| 317 _lh_instance_slow_path_bit = 0x01, | |
| 318 _lh_log2_element_size_shift = BitsPerByte*0, | |
| 319 _lh_log2_element_size_mask = BitsPerLong-1, | |
| 320 _lh_element_type_shift = BitsPerByte*1, | |
| 321 _lh_element_type_mask = right_n_bits(BitsPerByte), // shifted mask | |
| 322 _lh_header_size_shift = BitsPerByte*2, | |
| 323 _lh_header_size_mask = right_n_bits(BitsPerByte), // shifted mask | |
| 324 _lh_array_tag_bits = 2, | |
| 325 _lh_array_tag_shift = BitsPerInt - _lh_array_tag_bits, | |
| 326 _lh_array_tag_type_value = ~0x00, // 0xC0000000 >> 30 | |
| 327 _lh_array_tag_obj_value = ~0x01 // 0x80000000 >> 30 | |
| 328 }; | |
| 329 | |
| 330 static int layout_helper_size_in_bytes(jint lh) { | |
| 331 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 332 return (int) lh & ~_lh_instance_slow_path_bit; | |
| 333 } | |
| 334 static bool layout_helper_needs_slow_path(jint lh) { | |
| 335 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 336 return (lh & _lh_instance_slow_path_bit) != 0; | |
| 337 } | |
| 338 static bool layout_helper_is_instance(jint lh) { | |
| 339 return (jint)lh > (jint)_lh_neutral_value; | |
| 340 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
341 static bool layout_helper_is_array(jint lh) { |
| 0 | 342 return (jint)lh < (jint)_lh_neutral_value; |
| 343 } | |
| 344 static bool layout_helper_is_typeArray(jint lh) { | |
| 345 // _lh_array_tag_type_value == (lh >> _lh_array_tag_shift); | |
| 346 return (juint)lh >= (juint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
| 347 } | |
| 348 static bool layout_helper_is_objArray(jint lh) { | |
| 349 // _lh_array_tag_obj_value == (lh >> _lh_array_tag_shift); | |
| 350 return (jint)lh < (jint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
| 351 } | |
| 352 static int layout_helper_header_size(jint lh) { | |
| 353 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 354 int hsize = (lh >> _lh_header_size_shift) & _lh_header_size_mask; | |
| 355 assert(hsize > 0 && hsize < (int)sizeof(oopDesc)*3, "sanity"); | |
| 356 return hsize; | |
| 357 } | |
| 358 static BasicType layout_helper_element_type(jint lh) { | |
| 359 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 360 int btvalue = (lh >> _lh_element_type_shift) & _lh_element_type_mask; | |
| 361 assert(btvalue >= T_BOOLEAN && btvalue <= T_OBJECT, "sanity"); | |
| 362 return (BasicType) btvalue; | |
| 363 } | |
| 364 static int layout_helper_log2_element_size(jint lh) { | |
| 365 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 366 int l2esz = (lh >> _lh_log2_element_size_shift) & _lh_log2_element_size_mask; | |
| 367 assert(l2esz <= LogBitsPerLong, "sanity"); | |
| 368 return l2esz; | |
| 369 } | |
| 370 static jint array_layout_helper(jint tag, int hsize, BasicType etype, int log2_esize) { | |
| 371 return (tag << _lh_array_tag_shift) | |
| 372 | (hsize << _lh_header_size_shift) | |
| 373 | ((int)etype << _lh_element_type_shift) | |
| 374 | (log2_esize << _lh_log2_element_size_shift); | |
| 375 } | |
| 376 static jint instance_layout_helper(jint size, bool slow_path_flag) { | |
| 377 return (size << LogHeapWordSize) | |
| 378 | (slow_path_flag ? _lh_instance_slow_path_bit : 0); | |
| 379 } | |
| 380 static int layout_helper_to_size_helper(jint lh) { | |
| 381 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 382 // Note that the following expression discards _lh_instance_slow_path_bit. | |
| 383 return lh >> LogHeapWordSize; | |
| 384 } | |
| 385 // Out-of-line version computes everything based on the etype: | |
| 386 static jint array_layout_helper(BasicType etype); | |
| 387 | |
| 388 // What is the maximum number of primary superclasses any klass can have? | |
| 389 #ifdef PRODUCT | |
| 390 static juint primary_super_limit() { return _primary_super_limit; } | |
| 391 #else | |
| 392 static juint primary_super_limit() { | |
| 393 assert(FastSuperclassLimit <= _primary_super_limit, "parameter oob"); | |
| 394 return FastSuperclassLimit; | |
| 395 } | |
| 396 #endif | |
| 397 | |
| 398 // vtables | |
| 399 virtual klassVtable* vtable() const { return NULL; } | |
| 400 | |
| 401 // subclass check | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
402 bool is_subclass_of(Klass* k) const; |
| 0 | 403 // 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
|
404 bool is_subtype_of(Klass* k) const { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
405 juint off = k->super_check_offset(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
406 Klass* sup = *(Klass**)( (address)this + off ); |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
407 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
| 0 | 408 if (sup == k) { |
| 409 return true; | |
| 410 } else if (off != secondary_offset) { | |
| 411 return false; | |
| 412 } else { | |
| 413 return search_secondary_supers(k); | |
| 414 } | |
| 415 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
416 bool search_secondary_supers(Klass* k) const; |
| 0 | 417 |
| 605 | 418 // Find LCA in class hierarchy |
| 0 | 419 Klass *LCA( Klass *k ); |
| 420 | |
| 421 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
| 422 // if not, throw either an Error or an Exception. | |
| 423 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
| 424 | |
| 425 // Casting | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
426 static Klass* cast(Klass* k) { |
| 0 | 427 assert(k->is_klass(), "cast to Klass"); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
428 return k; |
| 0 | 429 } |
| 430 | |
| 431 // array copying | |
| 432 virtual void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); | |
| 433 | |
| 434 // tells if the class should be initialized | |
| 435 virtual bool should_be_initialized() const { return false; } | |
| 436 // initializes the klass | |
| 437 virtual void initialize(TRAPS); | |
| 438 // lookup operation for MethodLookupCache | |
| 439 friend class MethodLookupCache; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
440 virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
| 0 | 441 public: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
442 Method* lookup_method(Symbol* name, Symbol* signature) const { |
| 0 | 443 return uncached_lookup_method(name, signature); |
| 444 } | |
| 445 | |
| 446 // array class with specific rank | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
447 Klass* array_klass(int rank, TRAPS) { return array_klass_impl(false, rank, THREAD); } |
| 0 | 448 |
| 449 // 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
|
450 Klass* array_klass(TRAPS) { return array_klass_impl(false, THREAD); } |
| 0 | 451 |
| 452 // These will return NULL instead of allocating on the heap: | |
| 453 // 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
|
454 Klass* array_klass_or_null(int rank); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
455 Klass* array_klass_or_null(); |
| 0 | 456 |
| 457 virtual oop protection_domain() { return NULL; } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
458 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
459 oop class_loader() const; |
| 0 | 460 |
| 461 protected: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
462 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
|
463 virtual Klass* array_klass_impl(bool or_null, TRAPS); |
| 0 | 464 |
| 465 public: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
466 // CDS support - remove and restore oops from metadata. Oops are not shared. |
| 0 | 467 virtual void remove_unshareable_info(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
468 virtual void restore_unshareable_info(TRAPS); |
| 0 | 469 |
| 470 protected: | |
| 471 // computes the subtype relationship | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
472 virtual bool compute_is_subtype_of(Klass* k); |
| 0 | 473 public: |
| 474 // subclass accessor (here for convenience; undefined for non-klass objects) | |
| 475 virtual bool is_leaf_class() const { fatal("not a class"); return false; } | |
| 476 public: | |
| 477 // ALL FUNCTIONS BELOW THIS POINT ARE DISPATCHED FROM AN OOP | |
| 478 // These functions describe behavior for the oop not the KLASS. | |
| 479 | |
| 480 // actual oop size of obj in memory | |
| 481 virtual int oop_size(oop obj) const = 0; | |
| 482 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
483 // Size of klass in word size. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
484 virtual int size() const = 0; |
| 0 | 485 |
| 486 // Returns the Java name for a class (Resource allocated) | |
| 487 // For arrays, this returns the name of the element with a leading '['. | |
| 488 // For classes, this returns the name with the package separators | |
| 489 // turned into '.'s. | |
| 490 const char* external_name() const; | |
| 491 // Returns the name for a class (Resource allocated) as the class | |
| 492 // would appear in a signature. | |
| 493 // For arrays, this returns the name of the element with a leading '['. | |
| 494 // For classes, this returns the name with a leading 'L' and a trailing ';' | |
| 495 // and the package separators as '/'. | |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
628
diff
changeset
|
496 virtual const char* signature_name() const; |
| 0 | 497 |
| 498 // garbage collection support | |
| 499 virtual void oop_follow_contents(oop obj) = 0; | |
| 500 virtual int oop_adjust_pointers(oop obj) = 0; | |
| 501 | |
| 502 // Parallel Scavenge and Parallel Old | |
| 503 PARALLEL_GC_DECLS_PV | |
| 504 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
505 // type testing operations |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
506 protected: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
507 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
|
508 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
|
509 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
|
510 virtual bool oop_is_typeArray_slow() const { return false; } |
| 0 | 511 public: |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2177
diff
changeset
|
512 virtual bool oop_is_instanceMirror() const { return false; } |
| 0 | 513 virtual bool oop_is_instanceRef() const { return false; } |
| 514 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
515 // Fast non-virtual versions |
| 0 | 516 #ifndef ASSERT |
| 517 #define assert_same_query(xval, xcheck) xval | |
| 518 #else | |
| 519 private: | |
| 520 static bool assert_same_query(bool xval, bool xslow) { | |
| 521 assert(xval == xslow, "slow and fast queries agree"); | |
| 522 return xval; | |
| 523 } | |
| 524 public: | |
| 525 #endif | |
| 526 inline bool oop_is_instance() const { return assert_same_query( | |
| 527 layout_helper_is_instance(layout_helper()), | |
| 528 oop_is_instance_slow()); } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
529 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
|
530 layout_helper_is_array(layout_helper()), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
531 oop_is_array_slow()); } |
| 0 | 532 inline bool oop_is_objArray() const { return assert_same_query( |
| 533 layout_helper_is_objArray(layout_helper()), | |
| 534 oop_is_objArray_slow()); } | |
| 535 inline bool oop_is_typeArray() const { return assert_same_query( | |
| 536 layout_helper_is_typeArray(layout_helper()), | |
| 537 oop_is_typeArray_slow()); } | |
| 538 #undef assert_same_query | |
| 539 | |
| 540 // Access flags | |
| 541 AccessFlags access_flags() const { return _access_flags; } | |
| 542 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 543 | |
| 544 bool is_public() const { return _access_flags.is_public(); } | |
| 545 bool is_final() const { return _access_flags.is_final(); } | |
| 546 bool is_interface() const { return _access_flags.is_interface(); } | |
| 547 bool is_abstract() const { return _access_flags.is_abstract(); } | |
| 548 bool is_super() const { return _access_flags.is_super(); } | |
| 549 bool is_synthetic() const { return _access_flags.is_synthetic(); } | |
| 550 void set_is_synthetic() { _access_flags.set_is_synthetic(); } | |
| 551 bool has_finalizer() const { return _access_flags.has_finalizer(); } | |
| 552 bool has_final_method() const { return _access_flags.has_final_method(); } | |
| 553 void set_has_finalizer() { _access_flags.set_has_finalizer(); } | |
| 554 void set_has_final_method() { _access_flags.set_has_final_method(); } | |
| 555 bool is_cloneable() const { return _access_flags.is_cloneable(); } | |
| 556 void set_is_cloneable() { _access_flags.set_is_cloneable(); } | |
| 557 bool has_vanilla_constructor() const { return _access_flags.has_vanilla_constructor(); } | |
| 558 void set_has_vanilla_constructor() { _access_flags.set_has_vanilla_constructor(); } | |
| 559 bool has_miranda_methods () const { return access_flags().has_miranda_methods(); } | |
| 560 void set_has_miranda_methods() { _access_flags.set_has_miranda_methods(); } | |
| 561 | |
| 562 // Biased locking support | |
| 563 // Note: the prototype header is always set up to be at least the | |
| 564 // prototype markOop. If biased locking is enabled it may further be | |
| 565 // biasable and have an epoch. | |
| 566 markOop prototype_header() const { return _prototype_header; } | |
| 567 // NOTE: once instances of this klass are floating around in the | |
| 568 // system, this header must only be updated at a safepoint. | |
| 569 // NOTE 2: currently we only ever set the prototype header to the | |
| 570 // biasable prototype for instanceKlasses. There is no technical | |
| 571 // reason why it could not be done for arrayKlasses aside from | |
| 572 // wanting to reduce the initial scope of this optimization. There | |
| 573 // are potential problems in setting the bias pattern for | |
| 574 // JVM-internal oops. | |
| 575 inline void set_prototype_header(markOop header); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
576 static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); } |
| 0 | 577 |
| 578 int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; } | |
| 579 // Atomically increments biased_lock_revocation_count and returns updated value | |
| 580 int atomic_incr_biased_lock_revocation_count(); | |
| 581 void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; } | |
| 582 jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; } | |
| 583 void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; } | |
| 584 | |
|
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
585 TRACE_DEFINE_KLASS_METHODS; |
| 0 | 586 |
| 587 // garbage collection support | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
588 virtual void oops_do(OopClosure* cl); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
589 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
590 // Checks if the class loader is alive. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
591 // 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
|
592 // 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
|
593 bool is_loader_alive(BoolObjectClosure* is_alive); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
594 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
595 static void clean_weak_klass_links(BoolObjectClosure* is_alive); |
| 0 | 596 |
| 597 // Prefetch within oop iterators. This is a macro because we | |
| 598 // can't guarantee that the compiler will inline it. In 64-bit | |
| 599 // it generally doesn't. Signature is | |
| 600 // | |
| 601 // static void prefetch_beyond(oop* const start, | |
| 602 // oop* const end, | |
| 603 // const intx foffset, | |
| 604 // const Prefetch::style pstyle); | |
| 605 #define prefetch_beyond(start, end, foffset, pstyle) { \ | |
| 606 const intx foffset_ = (foffset); \ | |
| 607 const Prefetch::style pstyle_ = (pstyle); \ | |
| 608 assert(foffset_ > 0, "prefetch beyond, not behind"); \ | |
| 609 if (pstyle_ != Prefetch::do_none) { \ | |
| 610 oop* ref = (start); \ | |
| 611 if (ref < (end)) { \ | |
| 612 switch (pstyle_) { \ | |
| 613 case Prefetch::do_read: \ | |
| 614 Prefetch::read(*ref, foffset_); \ | |
| 615 break; \ | |
| 616 case Prefetch::do_write: \ | |
| 617 Prefetch::write(*ref, foffset_); \ | |
| 618 break; \ | |
| 619 default: \ | |
| 620 ShouldNotReachHere(); \ | |
| 621 break; \ | |
| 622 } \ | |
| 623 } \ | |
| 624 } \ | |
| 625 } | |
| 626 | |
| 627 // iterators | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
628 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
|
629 virtual int oop_oop_iterate_v(oop obj, ExtendedOopClosure* blk) { |
| 0 | 630 return oop_oop_iterate(obj, blk); |
| 631 } | |
| 632 | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
633 #ifndef SERIALGC |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
634 // 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
|
635 // iteration. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
636 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
|
637 return oop_oop_iterate_v(obj, blk); |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
638 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
639 #endif // !SERIALGC |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
640 |
| 0 | 641 // Iterates "blk" over all the oops in "obj" (of type "this") within "mr". |
| 642 // (I don't see why the _m should be required, but without it the Solaris | |
| 643 // C++ gives warning messages about overridings of the "oop_oop_iterate" | |
| 644 // 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
|
645 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
|
646 virtual int oop_oop_iterate_v_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
| 0 | 647 return oop_oop_iterate_m(obj, blk, mr); |
| 648 } | |
| 649 | |
| 650 // Versions of the above iterators specialized to particular subtypes | |
| 651 // of OopClosure, to avoid closure virtual calls. | |
| 652 #define Klass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
| 653 virtual int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk) { \ | |
| 654 /* Default implementation reverts to general version. */ \ | |
| 655 return oop_oop_iterate(obj, blk); \ | |
| 656 } \ | |
| 657 \ | |
| 658 /* Iterates "blk" over all the oops in "obj" (of type "this") within "mr". \ | |
| 659 (I don't see why the _m should be required, but without it the Solaris \ | |
| 660 C++ gives warning messages about overridings of the "oop_oop_iterate" \ | |
| 661 defined above "hiding" this virtual function. (DLD, 6/20/00)) */ \ | |
| 662 virtual int oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
| 663 OopClosureType* blk, \ | |
| 664 MemRegion mr) { \ | |
| 665 return oop_oop_iterate_m(obj, blk, mr); \ | |
| 666 } | |
| 667 | |
| 668 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
|
669 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
|
670 |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
671 #ifndef SERIALGC |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
672 #define Klass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
673 virtual int oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
674 OopClosureType* blk) { \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
675 /* Default implementation reverts to general version. */ \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
676 return oop_oop_iterate_backwards_v(obj, blk); \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
677 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
678 |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
679 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
|
680 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
|
681 #endif // !SERIALGC |
| 0 | 682 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
683 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
|
684 virtual void with_array_klasses_do(void f(Klass* k)); |
| 0 | 685 |
| 686 // Return self, except for abstract classes with exactly 1 | |
| 687 // implementor. Then return the 1 concrete implementation. | |
| 688 Klass *up_cast_abstract(); | |
| 689 | |
| 690 // klass name | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
691 Symbol* name() const { return _name; } |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
692 void set_name(Symbol* n); |
| 0 | 693 |
| 694 public: | |
| 695 // jvm support | |
| 696 virtual jint compute_modifier_flags(TRAPS) const; | |
| 697 | |
| 698 // JVMTI support | |
| 699 virtual jint jvmti_class_status() const; | |
| 700 | |
| 701 // Printing | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
702 virtual void print_on(outputStream* st) const; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
703 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1039
diff
changeset
|
704 virtual void oop_print_value_on(oop obj, outputStream* st); |
| 0 | 705 virtual void oop_print_on (oop obj, outputStream* st); |
| 706 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
707 virtual const char* internal_name() const = 0; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
708 |
| 0 | 709 // Verification |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
710 virtual void verify_on(outputStream* st); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
711 void verify() { verify_on(tty); } |
| 0 | 712 |
| 713 #ifndef PRODUCT | |
| 714 void verify_vtable_index(int index); | |
| 715 #endif | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
716 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
717 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
|
718 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
719 private: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
720 // barriers used by klass_oop_store |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
721 void klass_update_barrier_set(oop v); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
722 void klass_update_barrier_set_pre(void* p, oop v); |
| 0 | 723 }; |
| 1972 | 724 |
| 725 #endif // SHARE_VM_OOPS_KLASS_HPP |