Mercurial > hg > truffle
annotate src/share/vm/oops/klass.hpp @ 14649:f6301b007a16
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Wed, 26 Feb 2014 15:20:41 -0800 |
| parents | 48314d596a04 |
| children | 7f0e0366ec81 386dd1c71858 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
14378
48314d596a04
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents:
12264
diff
changeset
|
2 * Copyright (c) 1997, 2014, 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" |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
38 #include "utilities/macros.hpp" |
|
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
39 #if INCLUDE_ALL_GCS |
| 1972 | 40 #include "gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp" |
| 41 #include "gc_implementation/g1/g1OopClosures.hpp" | |
| 42 #include "gc_implementation/parNew/parOopClosures.hpp" | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
43 #endif // INCLUDE_ALL_GCS |
| 1972 | 44 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
45 // |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
46 // A Klass provides: |
| 0 | 47 // 1: language level class object (method dictionary etc.) |
| 48 // 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
|
49 // Both functions are combined into one C++ class. |
| 0 | 50 |
| 51 // One reason for the oop/klass dichotomy in the implementation is | |
| 52 // that we don't want a C++ vtbl pointer in every object. Thus, | |
| 53 // normal oops don't have any virtual functions. Instead, they | |
| 54 // forward all "virtual" functions to their klass, which does have | |
| 55 // a vtbl and does the C++ dispatch depending on the object's | |
| 56 // actual type. (See oop.inline.hpp for some of the forwarding code.) | |
| 57 // ALL FUNCTIONS IMPLEMENTING THIS DISPATCH ARE PREFIXED WITH "oop_"! | |
| 58 | |
| 59 // Klass layout: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
60 // [C++ vtbl ptr ] (contained in Metadata) |
| 0 | 61 // [layout_helper ] |
| 62 // [super_check_offset ] for fast subtype checks | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
63 // [name ] |
| 0 | 64 // [secondary_super_cache] for fast subtype checks |
| 65 // [secondary_supers ] array of 2ndary supertypes | |
| 66 // [primary_supers 0] | |
| 67 // [primary_supers 1] | |
| 68 // [primary_supers 2] | |
| 69 // ... | |
| 70 // [primary_supers 7] | |
| 71 // [java_mirror ] | |
| 72 // [super ] | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
73 // [subklass ] first subclass |
| 0 | 74 // [next_sibling ] link to chain additional subklasses |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
75 // [next_link ] |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
76 // [class_loader_data] |
| 0 | 77 // [modifier_flags] |
| 78 // [access_flags ] | |
| 79 // [last_biased_lock_bulk_revocation_time] (64 bits) | |
| 80 // [prototype_header] | |
| 81 // [biased_lock_revocation_count] | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
82 // [_modified_oops] |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
83 // [_accumulated_modified_oops] |
|
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
84 // [trace_id] |
| 0 | 85 |
| 86 | |
| 87 // Forward declarations. | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
88 template <class T> class Array; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
89 template <class T> class GrowableArray; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
90 class ClassLoaderData; |
| 0 | 91 class klassVtable; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
92 class ParCompactionManager; |
| 7956 | 93 class KlassSizeStats; |
| 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 | |
|
7968
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
167 // Biased locking implementation and statistics |
|
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
168 // (the 64-bit chunk goes first, to avoid some fragmentation) |
|
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
169 jlong _last_biased_lock_bulk_revocation_time; |
|
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
170 markOop _prototype_header; // Used when biased locking is both enabled and disabled for this type |
|
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
171 jint _biased_lock_revocation_count; |
|
44c5fcd9cb25
8006280: Need to reorder metadata structures to reduce size (64-bit)
iklam
parents:
7409
diff
changeset
|
172 |
|
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
173 TRACE_DEFINE_KLASS_TRACE_ID; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
174 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
175 // 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
|
176 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
|
177 jbyte _accumulated_modified_oops; // Mod Union Equivalent (CMS support) |
| 0 | 178 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
179 // Constructor |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
180 Klass(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
181 |
|
12146
9758d9f36299
8021954: VM SIGSEGV during classloading on MacOS; hs_err_pid file produced
coleenp
parents:
12089
diff
changeset
|
182 void* operator new(size_t size, ClassLoaderData* loader_data, size_t word_size, TRAPS) throw(); |
| 0 | 183 |
| 184 public: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
185 bool is_klass() const volatile { return true; } |
| 0 | 186 |
| 187 // super | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
188 Klass* super() const { return _super; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
189 void set_super(Klass* k) { _super = k; } |
| 0 | 190 |
| 191 // 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
|
192 void initialize_supers(Klass* k, TRAPS); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
193 void initialize_supers_impl1(Klass* k); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
194 void initialize_supers_impl2(Klass* k); |
| 0 | 195 |
| 196 // klass-specific helper for initializing _secondary_supers | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
197 virtual GrowableArray<Klass*>* compute_secondary_supers(int num_extra_slots); |
| 0 | 198 |
| 199 // 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
|
200 virtual Klass* java_super() const { return NULL; } |
| 0 | 201 |
| 202 juint super_check_offset() const { return _super_check_offset; } | |
| 203 void set_super_check_offset(juint o) { _super_check_offset = o; } | |
| 204 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
205 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
|
206 void set_secondary_super_cache(Klass* k) { _secondary_super_cache = k; } |
| 0 | 207 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
208 Array<Klass*>* secondary_supers() const { return _secondary_supers; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
209 void set_secondary_supers(Array<Klass*>* k) { _secondary_supers = k; } |
| 0 | 210 |
| 211 // Return the element of the _super chain of the given depth. | |
| 212 // 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
|
213 Klass* primary_super_of_depth(juint i) const { |
| 0 | 214 assert(i < primary_super_limit(), "oob"); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
215 Klass* super = _primary_supers[i]; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
216 assert(super == NULL || super->super_depth() == i, "correct display"); |
| 0 | 217 return super; |
| 218 } | |
| 219 | |
| 220 // Can this klass be a primary super? False for interfaces and arrays of | |
| 221 // interfaces. False also for arrays or classes with long super chains. | |
| 222 bool can_be_primary_super() const { | |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
223 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
| 0 | 224 return super_check_offset() != secondary_offset; |
| 225 } | |
| 226 virtual bool can_be_primary_super_slow() const; | |
| 227 | |
| 228 // Returns number of primary supers; may be a number in the inclusive range [0, primary_super_limit]. | |
| 229 juint super_depth() const { | |
| 230 if (!can_be_primary_super()) { | |
| 231 return primary_super_limit(); | |
| 232 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
233 juint d = (super_check_offset() - in_bytes(primary_supers_offset())) / sizeof(Klass*); |
| 0 | 234 assert(d < primary_super_limit(), "oob"); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
235 assert(_primary_supers[d] == this, "proper init"); |
| 0 | 236 return d; |
| 237 } | |
| 238 } | |
| 239 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
240 // 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
|
241 void klass_oop_store(oop* p, oop v); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
242 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
|
243 |
| 0 | 244 // java mirror |
| 245 oop java_mirror() const { return _java_mirror; } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
246 void set_java_mirror(oop m) { klass_oop_store(&_java_mirror, m); } |
| 0 | 247 |
| 248 // modifier flags | |
| 249 jint modifier_flags() const { return _modifier_flags; } | |
| 250 void set_modifier_flags(jint flags) { _modifier_flags = flags; } | |
| 251 | |
| 252 // size helper | |
| 253 int layout_helper() const { return _layout_helper; } | |
| 254 void set_layout_helper(int lh) { _layout_helper = lh; } | |
| 255 | |
| 256 // 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
|
257 // Use InstanceKlass::contains_field_offset to classify field offsets. |
| 0 | 258 |
| 259 // sub/superklass links | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
260 InstanceKlass* superklass() const; |
| 0 | 261 Klass* subklass() const; |
| 262 Klass* next_sibling() const; | |
| 263 void append_to_sibling_list(); // add newly created receiver to superklass' subklass list | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
264 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
265 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
|
266 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
|
267 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
268 // class loader data |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
269 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
|
270 void set_class_loader_data(ClassLoaderData* loader_data) { _class_loader_data = loader_data; } |
| 0 | 271 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
272 // 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
|
273 // 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
|
274 // 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
|
275 void record_modified_oops() { _modified_oops = 1; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
276 void clear_modified_oops() { _modified_oops = 0; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
277 bool has_modified_oops() { return _modified_oops == 1; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
278 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
279 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
|
280 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
|
281 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
|
282 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
283 protected: // internal accessors |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
284 Klass* subklass_oop() const { return _subklass; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
285 Klass* next_sibling_oop() const { return _next_sibling; } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
286 void set_subklass(Klass* s); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
287 void set_next_sibling(Klass* s); |
| 0 | 288 |
| 289 public: | |
| 290 | |
| 291 // Compiler support | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
292 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
|
293 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
|
294 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
|
295 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
|
296 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
|
297 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
|
298 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
|
299 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
|
300 static ByteSize access_flags_offset() { return in_ByteSize(offset_of(Klass, _access_flags)); } |
| 0 | 301 |
| 302 // Unpacking layout_helper: | |
| 303 enum { | |
| 304 _lh_neutral_value = 0, // neutral non-array non-instance value | |
| 305 _lh_instance_slow_path_bit = 0x01, | |
| 306 _lh_log2_element_size_shift = BitsPerByte*0, | |
| 307 _lh_log2_element_size_mask = BitsPerLong-1, | |
| 308 _lh_element_type_shift = BitsPerByte*1, | |
| 309 _lh_element_type_mask = right_n_bits(BitsPerByte), // shifted mask | |
| 310 _lh_header_size_shift = BitsPerByte*2, | |
| 311 _lh_header_size_mask = right_n_bits(BitsPerByte), // shifted mask | |
| 312 _lh_array_tag_bits = 2, | |
| 313 _lh_array_tag_shift = BitsPerInt - _lh_array_tag_bits, | |
| 314 _lh_array_tag_type_value = ~0x00, // 0xC0000000 >> 30 | |
| 315 _lh_array_tag_obj_value = ~0x01 // 0x80000000 >> 30 | |
| 316 }; | |
| 317 | |
| 318 static int layout_helper_size_in_bytes(jint lh) { | |
| 319 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 320 return (int) lh & ~_lh_instance_slow_path_bit; | |
| 321 } | |
| 322 static bool layout_helper_needs_slow_path(jint lh) { | |
| 323 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 324 return (lh & _lh_instance_slow_path_bit) != 0; | |
| 325 } | |
| 326 static bool layout_helper_is_instance(jint lh) { | |
| 327 return (jint)lh > (jint)_lh_neutral_value; | |
| 328 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
329 static bool layout_helper_is_array(jint lh) { |
| 0 | 330 return (jint)lh < (jint)_lh_neutral_value; |
| 331 } | |
| 332 static bool layout_helper_is_typeArray(jint lh) { | |
| 333 // _lh_array_tag_type_value == (lh >> _lh_array_tag_shift); | |
| 334 return (juint)lh >= (juint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
| 335 } | |
| 336 static bool layout_helper_is_objArray(jint lh) { | |
| 337 // _lh_array_tag_obj_value == (lh >> _lh_array_tag_shift); | |
| 338 return (jint)lh < (jint)(_lh_array_tag_type_value << _lh_array_tag_shift); | |
| 339 } | |
| 340 static int layout_helper_header_size(jint lh) { | |
| 341 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 342 int hsize = (lh >> _lh_header_size_shift) & _lh_header_size_mask; | |
| 343 assert(hsize > 0 && hsize < (int)sizeof(oopDesc)*3, "sanity"); | |
| 344 return hsize; | |
| 345 } | |
| 346 static BasicType layout_helper_element_type(jint lh) { | |
| 347 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 348 int btvalue = (lh >> _lh_element_type_shift) & _lh_element_type_mask; | |
| 349 assert(btvalue >= T_BOOLEAN && btvalue <= T_OBJECT, "sanity"); | |
| 350 return (BasicType) btvalue; | |
| 351 } | |
| 352 static int layout_helper_log2_element_size(jint lh) { | |
| 353 assert(lh < (jint)_lh_neutral_value, "must be array"); | |
| 354 int l2esz = (lh >> _lh_log2_element_size_shift) & _lh_log2_element_size_mask; | |
|
12083
d0afbee540e0
8023227: Enhance layout_helper_log2_element_size assert
stefank
parents:
11096
diff
changeset
|
355 assert(l2esz <= LogBitsPerLong, |
|
d0afbee540e0
8023227: Enhance layout_helper_log2_element_size assert
stefank
parents:
11096
diff
changeset
|
356 err_msg("sanity. l2esz: 0x%x for lh: 0x%x", (uint)l2esz, (uint)lh)); |
| 0 | 357 return l2esz; |
| 358 } | |
| 359 static jint array_layout_helper(jint tag, int hsize, BasicType etype, int log2_esize) { | |
| 360 return (tag << _lh_array_tag_shift) | |
| 361 | (hsize << _lh_header_size_shift) | |
| 362 | ((int)etype << _lh_element_type_shift) | |
| 363 | (log2_esize << _lh_log2_element_size_shift); | |
| 364 } | |
| 365 static jint instance_layout_helper(jint size, bool slow_path_flag) { | |
| 366 return (size << LogHeapWordSize) | |
| 367 | (slow_path_flag ? _lh_instance_slow_path_bit : 0); | |
| 368 } | |
| 369 static int layout_helper_to_size_helper(jint lh) { | |
| 370 assert(lh > (jint)_lh_neutral_value, "must be instance"); | |
| 371 // Note that the following expression discards _lh_instance_slow_path_bit. | |
| 372 return lh >> LogHeapWordSize; | |
| 373 } | |
| 374 // Out-of-line version computes everything based on the etype: | |
| 375 static jint array_layout_helper(BasicType etype); | |
| 376 | |
| 377 // What is the maximum number of primary superclasses any klass can have? | |
| 378 #ifdef PRODUCT | |
| 379 static juint primary_super_limit() { return _primary_super_limit; } | |
| 380 #else | |
| 381 static juint primary_super_limit() { | |
| 382 assert(FastSuperclassLimit <= _primary_super_limit, "parameter oob"); | |
| 383 return FastSuperclassLimit; | |
| 384 } | |
| 385 #endif | |
| 386 | |
| 387 // vtables | |
| 388 virtual klassVtable* vtable() const { return NULL; } | |
|
10268
43083e670adf
8005056: NPG: Crash after redefining java.lang.Object
coleenp
parents:
10265
diff
changeset
|
389 virtual int vtable_length() const { return 0; } |
| 0 | 390 |
| 391 // subclass check | |
|
10265
92ef81e2f571
8003557: NPG: Klass* const k should be const Klass* k.
minqi
parents:
8712
diff
changeset
|
392 bool is_subclass_of(const Klass* k) const; |
| 0 | 393 // 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
|
394 bool is_subtype_of(Klass* k) const { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
395 juint off = k->super_check_offset(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
396 Klass* sup = *(Klass**)( (address)this + off ); |
|
4762
069ab3f976d3
7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents:
2376
diff
changeset
|
397 const juint secondary_offset = in_bytes(secondary_super_cache_offset()); |
| 0 | 398 if (sup == k) { |
| 399 return true; | |
| 400 } else if (off != secondary_offset) { | |
| 401 return false; | |
| 402 } else { | |
| 403 return search_secondary_supers(k); | |
| 404 } | |
| 405 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
406 bool search_secondary_supers(Klass* k) const; |
| 0 | 407 |
| 605 | 408 // Find LCA in class hierarchy |
| 0 | 409 Klass *LCA( Klass *k ); |
| 410 | |
| 411 // Check whether reflection/jni/jvm code is allowed to instantiate this class; | |
| 412 // if not, throw either an Error or an Exception. | |
| 413 virtual void check_valid_for_instantiation(bool throwError, TRAPS); | |
| 414 | |
| 415 // array copying | |
| 416 virtual void copy_array(arrayOop s, int src_pos, arrayOop d, int dst_pos, int length, TRAPS); | |
| 417 | |
| 418 // tells if the class should be initialized | |
| 419 virtual bool should_be_initialized() const { return false; } | |
| 420 // initializes the klass | |
| 421 virtual void initialize(TRAPS); | |
| 422 // lookup operation for MethodLookupCache | |
| 423 friend class MethodLookupCache; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
424 virtual Method* uncached_lookup_method(Symbol* name, Symbol* signature) const; |
| 0 | 425 public: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
426 Method* lookup_method(Symbol* name, Symbol* signature) const { |
| 0 | 427 return uncached_lookup_method(name, signature); |
| 428 } | |
| 429 | |
| 430 // array class with specific rank | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
431 Klass* array_klass(int rank, TRAPS) { return array_klass_impl(false, rank, THREAD); } |
| 0 | 432 |
| 433 // 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
|
434 Klass* array_klass(TRAPS) { return array_klass_impl(false, THREAD); } |
| 0 | 435 |
| 436 // These will return NULL instead of allocating on the heap: | |
| 437 // 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
|
438 Klass* array_klass_or_null(int rank); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
439 Klass* array_klass_or_null(); |
| 0 | 440 |
|
10343
6bd680e9ea35
8003421: NPG: Move oops out of InstanceKlass into mirror
coleenp
parents:
10268
diff
changeset
|
441 virtual oop protection_domain() const = 0; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
442 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
443 oop class_loader() const; |
| 0 | 444 |
| 7409 | 445 virtual oop klass_holder() const { return class_loader(); } |
| 446 | |
| 0 | 447 protected: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
448 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
|
449 virtual Klass* array_klass_impl(bool or_null, TRAPS); |
| 0 | 450 |
| 451 public: | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
452 // CDS support - remove and restore oops from metadata. Oops are not shared. |
| 0 | 453 virtual void remove_unshareable_info(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
454 virtual void restore_unshareable_info(TRAPS); |
| 0 | 455 |
| 456 protected: | |
| 457 // computes the subtype relationship | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
458 virtual bool compute_is_subtype_of(Klass* k); |
| 0 | 459 public: |
| 460 // subclass accessor (here for convenience; undefined for non-klass objects) | |
| 461 virtual bool is_leaf_class() const { fatal("not a class"); return false; } | |
| 462 public: | |
| 463 // ALL FUNCTIONS BELOW THIS POINT ARE DISPATCHED FROM AN OOP | |
| 464 // These functions describe behavior for the oop not the KLASS. | |
| 465 | |
| 466 // actual oop size of obj in memory | |
| 467 virtual int oop_size(oop obj) const = 0; | |
| 468 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
469 // Size of klass in word size. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
470 virtual int size() const = 0; |
| 7956 | 471 #if INCLUDE_SERVICES |
| 472 virtual void collect_statistics(KlassSizeStats *sz) const; | |
| 473 #endif | |
| 0 | 474 |
| 475 // Returns the Java name for a class (Resource allocated) | |
| 476 // For arrays, this returns the name of the element with a leading '['. | |
| 477 // For classes, this returns the name with the package separators | |
| 478 // turned into '.'s. | |
| 479 const char* external_name() const; | |
| 480 // Returns the name for a class (Resource allocated) as the class | |
| 481 // would appear in a signature. | |
| 482 // For arrays, this returns the name of the element with a leading '['. | |
| 483 // For classes, this returns the name with a leading 'L' and a trailing ';' | |
| 484 // and the package separators as '/'. | |
|
1039
987e948ebbc8
6815692: method handle code needs some cleanup (post-6655638)
jrose
parents:
628
diff
changeset
|
485 virtual const char* signature_name() const; |
| 0 | 486 |
| 487 // garbage collection support | |
| 488 virtual void oop_follow_contents(oop obj) = 0; | |
| 489 virtual int oop_adjust_pointers(oop obj) = 0; | |
| 490 | |
| 491 // Parallel Scavenge and Parallel Old | |
| 492 PARALLEL_GC_DECLS_PV | |
| 493 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
494 // type testing operations |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
495 protected: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
496 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
|
497 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
|
498 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
|
499 virtual bool oop_is_typeArray_slow() const { return false; } |
| 0 | 500 public: |
|
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2177
diff
changeset
|
501 virtual bool oop_is_instanceMirror() const { return false; } |
| 0 | 502 virtual bool oop_is_instanceRef() const { return false; } |
| 503 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
504 // Fast non-virtual versions |
| 0 | 505 #ifndef ASSERT |
| 506 #define assert_same_query(xval, xcheck) xval | |
| 507 #else | |
| 508 private: | |
| 509 static bool assert_same_query(bool xval, bool xslow) { | |
| 510 assert(xval == xslow, "slow and fast queries agree"); | |
| 511 return xval; | |
| 512 } | |
| 513 public: | |
| 514 #endif | |
| 515 inline bool oop_is_instance() const { return assert_same_query( | |
| 516 layout_helper_is_instance(layout_helper()), | |
| 517 oop_is_instance_slow()); } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
518 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
|
519 layout_helper_is_array(layout_helper()), |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
520 oop_is_array_slow()); } |
| 0 | 521 inline bool oop_is_objArray() const { return assert_same_query( |
| 522 layout_helper_is_objArray(layout_helper()), | |
| 523 oop_is_objArray_slow()); } | |
| 524 inline bool oop_is_typeArray() const { return assert_same_query( | |
| 525 layout_helper_is_typeArray(layout_helper()), | |
| 526 oop_is_typeArray_slow()); } | |
| 527 #undef assert_same_query | |
| 528 | |
| 529 // Access flags | |
| 530 AccessFlags access_flags() const { return _access_flags; } | |
| 531 void set_access_flags(AccessFlags flags) { _access_flags = flags; } | |
| 532 | |
| 533 bool is_public() const { return _access_flags.is_public(); } | |
| 534 bool is_final() const { return _access_flags.is_final(); } | |
| 535 bool is_interface() const { return _access_flags.is_interface(); } | |
| 536 bool is_abstract() const { return _access_flags.is_abstract(); } | |
| 537 bool is_super() const { return _access_flags.is_super(); } | |
| 538 bool is_synthetic() const { return _access_flags.is_synthetic(); } | |
| 539 void set_is_synthetic() { _access_flags.set_is_synthetic(); } | |
| 540 bool has_finalizer() const { return _access_flags.has_finalizer(); } | |
| 541 bool has_final_method() const { return _access_flags.has_final_method(); } | |
| 542 void set_has_finalizer() { _access_flags.set_has_finalizer(); } | |
| 543 void set_has_final_method() { _access_flags.set_has_final_method(); } | |
| 544 bool is_cloneable() const { return _access_flags.is_cloneable(); } | |
| 545 void set_is_cloneable() { _access_flags.set_is_cloneable(); } | |
| 546 bool has_vanilla_constructor() const { return _access_flags.has_vanilla_constructor(); } | |
| 547 void set_has_vanilla_constructor() { _access_flags.set_has_vanilla_constructor(); } | |
| 548 bool has_miranda_methods () const { return access_flags().has_miranda_methods(); } | |
| 549 void set_has_miranda_methods() { _access_flags.set_has_miranda_methods(); } | |
| 550 | |
| 551 // Biased locking support | |
| 552 // Note: the prototype header is always set up to be at least the | |
| 553 // prototype markOop. If biased locking is enabled it may further be | |
| 554 // biasable and have an epoch. | |
| 555 markOop prototype_header() const { return _prototype_header; } | |
| 556 // NOTE: once instances of this klass are floating around in the | |
| 557 // system, this header must only be updated at a safepoint. | |
| 558 // NOTE 2: currently we only ever set the prototype header to the | |
| 559 // biasable prototype for instanceKlasses. There is no technical | |
| 560 // reason why it could not be done for arrayKlasses aside from | |
| 561 // wanting to reduce the initial scope of this optimization. There | |
| 562 // are potential problems in setting the bias pattern for | |
| 563 // JVM-internal oops. | |
| 564 inline void set_prototype_header(markOop header); | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
565 static ByteSize prototype_header_offset() { return in_ByteSize(offset_of(Klass, _prototype_header)); } |
| 0 | 566 |
| 567 int biased_lock_revocation_count() const { return (int) _biased_lock_revocation_count; } | |
| 568 // Atomically increments biased_lock_revocation_count and returns updated value | |
| 569 int atomic_incr_biased_lock_revocation_count(); | |
| 570 void set_biased_lock_revocation_count(int val) { _biased_lock_revocation_count = (jint) val; } | |
| 571 jlong last_biased_lock_bulk_revocation_time() { return _last_biased_lock_bulk_revocation_time; } | |
| 572 void set_last_biased_lock_bulk_revocation_time(jlong cur_time) { _last_biased_lock_bulk_revocation_time = cur_time; } | |
| 573 | |
|
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
2376
diff
changeset
|
574 TRACE_DEFINE_KLASS_METHODS; |
| 0 | 575 |
| 576 // garbage collection support | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
577 virtual void oops_do(OopClosure* cl); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
578 |
|
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6983
diff
changeset
|
579 // Iff the class loader (or mirror for anonymous classes) is alive the |
|
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6983
diff
changeset
|
580 // Klass is considered alive. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
581 // 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
|
582 bool is_loader_alive(BoolObjectClosure* is_alive); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
583 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
584 static void clean_weak_klass_links(BoolObjectClosure* is_alive); |
| 0 | 585 |
| 586 // Prefetch within oop iterators. This is a macro because we | |
| 587 // can't guarantee that the compiler will inline it. In 64-bit | |
| 588 // it generally doesn't. Signature is | |
| 589 // | |
| 590 // static void prefetch_beyond(oop* const start, | |
| 591 // oop* const end, | |
| 592 // const intx foffset, | |
| 593 // const Prefetch::style pstyle); | |
| 594 #define prefetch_beyond(start, end, foffset, pstyle) { \ | |
| 595 const intx foffset_ = (foffset); \ | |
| 596 const Prefetch::style pstyle_ = (pstyle); \ | |
| 597 assert(foffset_ > 0, "prefetch beyond, not behind"); \ | |
| 598 if (pstyle_ != Prefetch::do_none) { \ | |
| 599 oop* ref = (start); \ | |
| 600 if (ref < (end)) { \ | |
| 601 switch (pstyle_) { \ | |
| 602 case Prefetch::do_read: \ | |
| 603 Prefetch::read(*ref, foffset_); \ | |
| 604 break; \ | |
| 605 case Prefetch::do_write: \ | |
| 606 Prefetch::write(*ref, foffset_); \ | |
| 607 break; \ | |
| 608 default: \ | |
| 609 ShouldNotReachHere(); \ | |
| 610 break; \ | |
| 611 } \ | |
| 612 } \ | |
| 613 } \ | |
| 614 } | |
| 615 | |
| 616 // iterators | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
617 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
|
618 virtual int oop_oop_iterate_v(oop obj, ExtendedOopClosure* blk) { |
| 0 | 619 return oop_oop_iterate(obj, blk); |
| 620 } | |
| 621 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
622 #if INCLUDE_ALL_GCS |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
623 // 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
|
624 // iteration. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
625 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
|
626 return oop_oop_iterate_v(obj, blk); |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
627 } |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
628 #endif // INCLUDE_ALL_GCS |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
629 |
| 0 | 630 // Iterates "blk" over all the oops in "obj" (of type "this") within "mr". |
| 631 // (I don't see why the _m should be required, but without it the Solaris | |
| 632 // C++ gives warning messages about overridings of the "oop_oop_iterate" | |
| 633 // 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
|
634 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
|
635 virtual int oop_oop_iterate_v_m(oop obj, ExtendedOopClosure* blk, MemRegion mr) { |
| 0 | 636 return oop_oop_iterate_m(obj, blk, mr); |
| 637 } | |
| 638 | |
| 639 // Versions of the above iterators specialized to particular subtypes | |
| 640 // of OopClosure, to avoid closure virtual calls. | |
| 641 #define Klass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \ | |
| 642 virtual int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk) { \ | |
| 643 /* Default implementation reverts to general version. */ \ | |
| 644 return oop_oop_iterate(obj, blk); \ | |
| 645 } \ | |
| 646 \ | |
| 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)) */ \ | |
| 651 virtual int oop_oop_iterate##nv_suffix##_m(oop obj, \ | |
| 652 OopClosureType* blk, \ | |
| 653 MemRegion mr) { \ | |
| 654 return oop_oop_iterate_m(obj, blk, mr); \ | |
| 655 } | |
| 656 | |
| 657 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
|
658 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
|
659 |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
660 #if INCLUDE_ALL_GCS |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
661 #define Klass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
662 virtual int oop_oop_iterate_backwards##nv_suffix(oop obj, \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
663 OopClosureType* blk) { \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
664 /* Default implementation reverts to general version. */ \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
665 return oop_oop_iterate_backwards_v(obj, blk); \ |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
666 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
667 |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
113
diff
changeset
|
668 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
|
669 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_2(Klass_OOP_OOP_ITERATE_BACKWARDS_DECL) |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7409
diff
changeset
|
670 #endif // INCLUDE_ALL_GCS |
| 0 | 671 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
672 virtual void array_klasses_do(void f(Klass* k)) {} |
| 0 | 673 |
| 674 // Return self, except for abstract classes with exactly 1 | |
| 675 // implementor. Then return the 1 concrete implementation. | |
| 676 Klass *up_cast_abstract(); | |
| 677 | |
| 678 // klass name | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
679 Symbol* name() const { return _name; } |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
680 void set_name(Symbol* n); |
| 0 | 681 |
| 682 public: | |
| 683 // jvm support | |
| 684 virtual jint compute_modifier_flags(TRAPS) const; | |
| 685 | |
| 686 // JVMTI support | |
| 687 virtual jint jvmti_class_status() const; | |
| 688 | |
| 689 // Printing | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
690 virtual void print_on(outputStream* st) const; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
691 |
|
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1039
diff
changeset
|
692 virtual void oop_print_value_on(oop obj, outputStream* st); |
| 0 | 693 virtual void oop_print_on (oop obj, outputStream* st); |
| 694 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
695 virtual const char* internal_name() const = 0; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
696 |
| 0 | 697 // Verification |
|
14378
48314d596a04
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents:
12264
diff
changeset
|
698 virtual void verify_on(outputStream* st); |
|
48314d596a04
8027146: Class loading verification failure if GC occurs in Universe::flush_dependents_on
coleenp
parents:
12264
diff
changeset
|
699 void verify() { verify_on(tty); } |
| 0 | 700 |
| 701 #ifndef PRODUCT | |
|
12264
b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
drchase
parents:
12146
diff
changeset
|
702 bool verify_vtable_index(int index); |
|
b2e698d2276c
8014013: CallInfo structure no longer accurately reports the result of a LinkResolver operation
drchase
parents:
12146
diff
changeset
|
703 bool verify_itable_index(int index); |
| 0 | 704 #endif |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
705 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
706 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
|
707 |
|
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
708 static bool is_null(narrowKlass obj); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
709 static bool is_null(Klass* obj); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
710 |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
711 // klass encoding for klass pointer in objects. |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
712 static narrowKlass encode_klass_not_null(Klass* v); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
713 static narrowKlass encode_klass(Klass* v); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
714 |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
715 static Klass* decode_klass_not_null(narrowKlass v); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
716 static Klass* decode_klass(narrowKlass v); |
|
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11096
diff
changeset
|
717 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
718 private: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
719 // barriers used by klass_oop_store |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
720 void klass_update_barrier_set(oop v); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6008
diff
changeset
|
721 void klass_update_barrier_set_pre(void* p, oop v); |
| 0 | 722 }; |
| 1972 | 723 |
| 724 #endif // SHARE_VM_OOPS_KLASS_HPP |