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comparison src/share/vm/classfile/systemDictionary.hpp @ 132:60b728ec77c1

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6652736: well known classes in system dictionary are inefficiently processed Summary: combine many scalar variables into a single enum-indexed array in SystemDictionary. Reviewed-by: kvn
author jrose
date Tue, 29 Apr 2008 19:45:22 -0700
parents a61af66fc99e
children 83c868b757c0
comparison
equal deleted inserted replaced
131:6e825ad773c6 132:60b728ec77c1
62 class PlaceholderTable; 62 class PlaceholderTable;
63 class LoaderConstraintTable; 63 class LoaderConstraintTable;
64 class HashtableBucket; 64 class HashtableBucket;
65 class ResolutionErrorTable; 65 class ResolutionErrorTable;
66 66
67 // Certain classes are preloaded, such as java.lang.Object and java.lang.String.
68 // They are all "well-known", in the sense that no class loader is allowed
69 // to provide a different definition.
70 //
71 // These klasses must all have names defined in vmSymbols.
72
73 #define WK_KLASS_ENUM_NAME(kname) kname##_knum
74
75 // Each well-known class has a short klass name (like object_klass),
76 // a vmSymbol name (like java_lang_Object), and a flag word
77 // that makes some minor distinctions, like whether the klass
78 // is preloaded, optional, release-specific, etc.
79 // The order of these definitions is significant; it is the order in which
80 // preloading is actually performed by initialize_preloaded_classes.
81
82 #define WK_KLASSES_DO(template) \
83 /* well-known classes */ \
84 template(object_klass, java_lang_Object, Pre) \
85 template(string_klass, java_lang_String, Pre) \
86 template(class_klass, java_lang_Class, Pre) \
87 template(cloneable_klass, java_lang_Cloneable, Pre) \
88 template(classloader_klass, java_lang_ClassLoader, Pre) \
89 template(serializable_klass, java_io_Serializable, Pre) \
90 template(system_klass, java_lang_System, Pre) \
91 template(throwable_klass, java_lang_Throwable, Pre) \
92 template(error_klass, java_lang_Error, Pre) \
93 template(threaddeath_klass, java_lang_ThreadDeath, Pre) \
94 template(exception_klass, java_lang_Exception, Pre) \
95 template(runtime_exception_klass, java_lang_RuntimeException, Pre) \
96 template(protectionDomain_klass, java_security_ProtectionDomain, Pre) \
97 template(AccessControlContext_klass, java_security_AccessControlContext, Pre) \
98 template(classNotFoundException_klass, java_lang_ClassNotFoundException, Pre) \
99 template(noClassDefFoundError_klass, java_lang_NoClassDefFoundError, Pre) \
100 template(linkageError_klass, java_lang_LinkageError, Pre) \
101 template(ClassCastException_klass, java_lang_ClassCastException, Pre) \
102 template(ArrayStoreException_klass, java_lang_ArrayStoreException, Pre) \
103 template(virtualMachineError_klass, java_lang_VirtualMachineError, Pre) \
104 template(OutOfMemoryError_klass, java_lang_OutOfMemoryError, Pre) \
105 template(StackOverflowError_klass, java_lang_StackOverflowError, Pre) \
106 template(IllegalMonitorStateException_klass, java_lang_IllegalMonitorStateException, Pre) \
107 template(reference_klass, java_lang_ref_Reference, Pre) \
108 \
109 /* Preload ref klasses and set reference types */ \
110 template(soft_reference_klass, java_lang_ref_SoftReference, Pre) \
111 template(weak_reference_klass, java_lang_ref_WeakReference, Pre) \
112 template(final_reference_klass, java_lang_ref_FinalReference, Pre) \
113 template(phantom_reference_klass, java_lang_ref_PhantomReference, Pre) \
114 template(finalizer_klass, java_lang_ref_Finalizer, Pre) \
115 \
116 template(thread_klass, java_lang_Thread, Pre) \
117 template(threadGroup_klass, java_lang_ThreadGroup, Pre) \
118 template(properties_klass, java_util_Properties, Pre) \
119 template(reflect_accessible_object_klass, java_lang_reflect_AccessibleObject, Pre) \
120 template(reflect_field_klass, java_lang_reflect_Field, Pre) \
121 template(reflect_method_klass, java_lang_reflect_Method, Pre) \
122 template(reflect_constructor_klass, java_lang_reflect_Constructor, Pre) \
123 \
124 /* NOTE: needed too early in bootstrapping process to have checks based on JDK version */ \
125 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \
126 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \
127 template(reflect_magic_klass, sun_reflect_MagicAccessorImpl, Opt) \
128 template(reflect_method_accessor_klass, sun_reflect_MethodAccessorImpl, Opt_Only_JDK14NewRef) \
129 template(reflect_constructor_accessor_klass, sun_reflect_ConstructorAccessorImpl, Opt_Only_JDK14NewRef) \
130 template(reflect_delegating_classloader_klass, sun_reflect_DelegatingClassLoader, Opt) \
131 template(reflect_constant_pool_klass, sun_reflect_ConstantPool, Opt_Only_JDK15) \
132 template(reflect_unsafe_static_field_accessor_impl_klass, sun_reflect_UnsafeStaticFieldAccessorImpl, Opt_Only_JDK15) \
133 \
134 template(vector_klass, java_util_Vector, Pre) \
135 template(hashtable_klass, java_util_Hashtable, Pre) \
136 template(stringBuffer_klass, java_lang_StringBuffer, Pre) \
137 \
138 /* It's NULL in non-1.4 JDKs. */ \
139 template(stackTraceElement_klass, java_lang_StackTraceElement, Opt) \
140 /* Universe::is_gte_jdk14x_version() is not set up by this point. */ \
141 /* It's okay if this turns out to be NULL in non-1.4 JDKs. */ \
142 template(java_nio_Buffer_klass, java_nio_Buffer, Opt) \
143 \
144 /* If this class isn't present, it won't be referenced. */ \
145 template(sun_misc_AtomicLongCSImpl_klass, sun_misc_AtomicLongCSImpl, Opt) \
146 \
147 template(sun_jkernel_DownloadManager_klass, sun_jkernel_DownloadManager, Opt_Kernel) \
148 \
149 /* Preload boxing klasses */ \
150 template(boolean_klass, java_lang_Boolean, Pre) \
151 template(char_klass, java_lang_Character, Pre) \
152 template(float_klass, java_lang_Float, Pre) \
153 template(double_klass, java_lang_Double, Pre) \
154 template(byte_klass, java_lang_Byte, Pre) \
155 template(short_klass, java_lang_Short, Pre) \
156 template(int_klass, java_lang_Integer, Pre) \
157 template(long_klass, java_lang_Long, Pre) \
158 /*end*/
159
160
67 class SystemDictionary : AllStatic { 161 class SystemDictionary : AllStatic {
68 friend class VMStructs; 162 friend class VMStructs;
69 friend class CompactingPermGenGen; 163 friend class CompactingPermGenGen;
70 NOT_PRODUCT(friend class instanceKlassKlass;) 164 NOT_PRODUCT(friend class instanceKlassKlass;)
71 165
72 public: 166 public:
167 enum WKID {
168 NO_WKID = 0,
169
170 #define WK_KLASS_ENUM(name, ignore_s, ignore_o) WK_KLASS_ENUM_NAME(name),
171 WK_KLASSES_DO(WK_KLASS_ENUM)
172 #undef WK_KLASS_ENUM
173
174 WKID_LIMIT,
175
176 FIRST_WKID = NO_WKID + 1
177 };
178
179 enum InitOption {
180 Pre, // preloaded; error if not present
181
182 // Order is significant. Options before this point require resolve_or_fail.
183 // Options after this point will use resolve_or_null instead.
184
185 Opt, // preload tried; NULL if not present
186 Opt_Only_JDK14NewRef, // preload tried; use only with NewReflection
187 Opt_Only_JDK15, // preload tried; use only with JDK1.5+
188 Opt_Kernel, // preload tried only #ifdef KERNEL
189 OPTION_LIMIT,
190 CEIL_LG_OPTION_LIMIT = 4 // OPTION_LIMIT <= (1<<CEIL_LG_OPTION_LIMIT)
191 };
192
193
73 // Returns a class with a given class name and class loader. Loads the 194 // Returns a class with a given class name and class loader. Loads the
74 // class if needed. If not found a NoClassDefFoundError or a 195 // class if needed. If not found a NoClassDefFoundError or a
75 // ClassNotFoundException is thrown, depending on the value on the 196 // ClassNotFoundException is thrown, depending on the value on the
76 // throw_error flag. For most uses the throw_error argument should be set 197 // throw_error flag. For most uses the throw_error argument should be set
77 // to true. 198 // to true.
120 // If not found NULL is returned. 241 // If not found NULL is returned.
121 static klassOop find_instance_or_array_klass(symbolHandle class_name, 242 static klassOop find_instance_or_array_klass(symbolHandle class_name,
122 Handle class_loader, 243 Handle class_loader,
123 Handle protection_domain, 244 Handle protection_domain,
124 TRAPS); 245 TRAPS);
246
247 // If the given name is known to vmSymbols, return the well-know klass:
248 static klassOop find_well_known_klass(symbolOop class_name);
125 249
126 // Lookup an instance or array class that has already been loaded 250 // Lookup an instance or array class that has already been loaded
127 // either into the given class loader, or else into another class 251 // either into the given class loader, or else into another class
128 // loader that is constrained (via loader constraints) to produce 252 // loader that is constrained (via loader constraints) to produce
129 // a consistent class. Do not take protection domains into account. 253 // a consistent class. Do not take protection domains into account.
233 static klassOop check_klass(klassOop k) { 357 static klassOop check_klass(klassOop k) {
234 assert(k != NULL, "preloaded klass not initialized"); 358 assert(k != NULL, "preloaded klass not initialized");
235 return k; 359 return k;
236 } 360 }
237 361
362 static klassOop check_klass_Pre(klassOop k) { return check_klass(k); }
363 static klassOop check_klass_Opt(klassOop k) { return k; }
364 static klassOop check_klass_Opt_Kernel(klassOop k) { return k; } //== Opt
365 static klassOop check_klass_Opt_Only_JDK15(klassOop k) {
366 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
367 return k;
368 }
369 static klassOop check_klass_Opt_Only_JDK14NewRef(klassOop k) {
370 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
371 // despite the optional loading, if you use this it must be present:
372 return check_klass(k);
373 }
374
375 static bool initialize_wk_klass(WKID id, int init_opt, TRAPS);
376 static void initialize_wk_klasses_until(WKID limit_id, WKID &start_id, TRAPS);
377 static void initialize_wk_klasses_through(WKID end_id, WKID &start_id, TRAPS) {
378 int limit = (int)end_id + 1;
379 initialize_wk_klasses_until((WKID) limit, start_id, THREAD);
380 }
381
238 public: 382 public:
239 static klassOop object_klass() { return check_klass(_object_klass); } 383 #define WK_KLASS_DECLARE(name, ignore_symbol, option) \
240 static klassOop string_klass() { return check_klass(_string_klass); } 384 static klassOop name() { return check_klass_##option(_well_known_klasses[WK_KLASS_ENUM_NAME(name)]); }
241 static klassOop class_klass() { return check_klass(_class_klass); } 385 WK_KLASSES_DO(WK_KLASS_DECLARE);
242 static klassOop cloneable_klass() { return check_klass(_cloneable_klass); } 386 #undef WK_KLASS_DECLARE
243 static klassOop classloader_klass() { return check_klass(_classloader_klass); } 387
244 static klassOop serializable_klass() { return check_klass(_serializable_klass); } 388 // Local definition for direct access to the private array:
245 static klassOop system_klass() { return check_klass(_system_klass); } 389 #define WK_KLASS(name) _well_known_klasses[WK_KLASS_ENUM_NAME(name)]
246
247 static klassOop throwable_klass() { return check_klass(_throwable_klass); }
248 static klassOop error_klass() { return check_klass(_error_klass); }
249 static klassOop threaddeath_klass() { return check_klass(_threaddeath_klass); }
250 static klassOop exception_klass() { return check_klass(_exception_klass); }
251 static klassOop runtime_exception_klass() { return check_klass(_runtime_exception_klass); }
252 static klassOop classNotFoundException_klass() { return check_klass(_classNotFoundException_klass); }
253 static klassOop noClassDefFoundError_klass() { return check_klass(_noClassDefFoundError_klass); }
254 static klassOop linkageError_klass() { return check_klass(_linkageError_klass); }
255 static klassOop ClassCastException_klass() { return check_klass(_classCastException_klass); }
256 static klassOop ArrayStoreException_klass() { return check_klass(_arrayStoreException_klass); }
257 static klassOop virtualMachineError_klass() { return check_klass(_virtualMachineError_klass); }
258 static klassOop OutOfMemoryError_klass() { return check_klass(_outOfMemoryError_klass); }
259 static klassOop StackOverflowError_klass() { return check_klass(_StackOverflowError_klass); }
260 static klassOop IllegalMonitorStateException_klass() { return check_klass(_illegalMonitorStateException_klass); }
261 static klassOop protectionDomain_klass() { return check_klass(_protectionDomain_klass); }
262 static klassOop AccessControlContext_klass() { return check_klass(_AccessControlContext_klass); }
263 static klassOop reference_klass() { return check_klass(_reference_klass); }
264 static klassOop soft_reference_klass() { return check_klass(_soft_reference_klass); }
265 static klassOop weak_reference_klass() { return check_klass(_weak_reference_klass); }
266 static klassOop final_reference_klass() { return check_klass(_final_reference_klass); }
267 static klassOop phantom_reference_klass() { return check_klass(_phantom_reference_klass); }
268 static klassOop finalizer_klass() { return check_klass(_finalizer_klass); }
269
270 static klassOop thread_klass() { return check_klass(_thread_klass); }
271 static klassOop threadGroup_klass() { return check_klass(_threadGroup_klass); }
272 static klassOop properties_klass() { return check_klass(_properties_klass); }
273 static klassOop reflect_accessible_object_klass() { return check_klass(_reflect_accessible_object_klass); }
274 static klassOop reflect_field_klass() { return check_klass(_reflect_field_klass); }
275 static klassOop reflect_method_klass() { return check_klass(_reflect_method_klass); }
276 static klassOop reflect_constructor_klass() { return check_klass(_reflect_constructor_klass); }
277 static klassOop reflect_method_accessor_klass() {
278 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
279 return check_klass(_reflect_method_accessor_klass);
280 }
281 static klassOop reflect_constructor_accessor_klass() {
282 assert(JDK_Version::is_gte_jdk14x_version() && UseNewReflection, "JDK 1.4 only");
283 return check_klass(_reflect_constructor_accessor_klass);
284 }
285 // NOTE: needed too early in bootstrapping process to have checks based on JDK version
286 static klassOop reflect_magic_klass() { return _reflect_magic_klass; }
287 static klassOop reflect_delegating_classloader_klass() { return _reflect_delegating_classloader_klass; }
288 static klassOop reflect_constant_pool_klass() {
289 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
290 return _reflect_constant_pool_klass;
291 }
292 static klassOop reflect_unsafe_static_field_accessor_impl_klass() {
293 assert(JDK_Version::is_gte_jdk15x_version(), "JDK 1.5 only");
294 return _reflect_unsafe_static_field_accessor_impl_klass;
295 }
296
297 static klassOop vector_klass() { return check_klass(_vector_klass); }
298 static klassOop hashtable_klass() { return check_klass(_hashtable_klass); }
299 static klassOop stringBuffer_klass() { return check_klass(_stringBuffer_klass); }
300 static klassOop stackTraceElement_klass() { return check_klass(_stackTraceElement_klass); }
301
302 static klassOop java_nio_Buffer_klass() { return check_klass(_java_nio_Buffer_klass); }
303
304 static klassOop sun_misc_AtomicLongCSImpl_klass() { return _sun_misc_AtomicLongCSImpl_klass; }
305
306 // To support incremental JRE downloads (KERNEL JRE). Null if not present.
307 static klassOop sun_jkernel_DownloadManager_klass() { return _sun_jkernel_DownloadManager_klass; }
308
309 static klassOop boolean_klass() { return check_klass(_boolean_klass); }
310 static klassOop char_klass() { return check_klass(_char_klass); }
311 static klassOop float_klass() { return check_klass(_float_klass); }
312 static klassOop double_klass() { return check_klass(_double_klass); }
313 static klassOop byte_klass() { return check_klass(_byte_klass); }
314 static klassOop short_klass() { return check_klass(_short_klass); }
315 static klassOop int_klass() { return check_klass(_int_klass); }
316 static klassOop long_klass() { return check_klass(_long_klass); }
317 390
318 static klassOop box_klass(BasicType t) { 391 static klassOop box_klass(BasicType t) {
319 assert((uint)t < T_VOID+1, "range check"); 392 assert((uint)t < T_VOID+1, "range check");
320 return check_klass(_box_klasses[t]); 393 return check_klass(_box_klasses[t]);
321 } 394 }
333 406
334 public: 407 public:
335 // Tells whether ClassLoader.checkPackageAccess is present 408 // Tells whether ClassLoader.checkPackageAccess is present
336 static bool has_checkPackageAccess() { return _has_checkPackageAccess; } 409 static bool has_checkPackageAccess() { return _has_checkPackageAccess; }
337 410
338 static bool class_klass_loaded() { return _class_klass != NULL; } 411 static bool class_klass_loaded() { return WK_KLASS(class_klass) != NULL; }
339 static bool cloneable_klass_loaded() { return _cloneable_klass != NULL; } 412 static bool cloneable_klass_loaded() { return WK_KLASS(cloneable_klass) != NULL; }
340 413
341 // Returns default system loader 414 // Returns default system loader
342 static oop java_system_loader(); 415 static oop java_system_loader();
343 416
344 // Compute the default system loader 417 // Compute the default system loader
496 static void update_dictionary(int d_index, unsigned int d_hash, 569 static void update_dictionary(int d_index, unsigned int d_hash,
497 int p_index, unsigned int p_hash, 570 int p_index, unsigned int p_hash,
498 instanceKlassHandle k, Handle loader, TRAPS); 571 instanceKlassHandle k, Handle loader, TRAPS);
499 572
500 // Variables holding commonly used klasses (preloaded) 573 // Variables holding commonly used klasses (preloaded)
501 static klassOop _object_klass; 574 static klassOop _well_known_klasses[];
502 static klassOop _string_klass;
503 static klassOop _class_klass;
504 static klassOop _cloneable_klass;
505 static klassOop _classloader_klass;
506 static klassOop _serializable_klass;
507 static klassOop _system_klass;
508
509 static klassOop _throwable_klass;
510 static klassOop _error_klass;
511 static klassOop _threaddeath_klass;
512 static klassOop _exception_klass;
513 static klassOop _runtime_exception_klass;
514 static klassOop _classNotFoundException_klass;
515 static klassOop _noClassDefFoundError_klass;
516 static klassOop _linkageError_klass;
517 static klassOop _classCastException_klass;
518 static klassOop _arrayStoreException_klass;
519 static klassOop _virtualMachineError_klass;
520 static klassOop _outOfMemoryError_klass;
521 static klassOop _StackOverflowError_klass;
522 static klassOop _illegalMonitorStateException_klass;
523 static klassOop _protectionDomain_klass;
524 static klassOop _AccessControlContext_klass;
525 static klassOop _reference_klass;
526 static klassOop _soft_reference_klass;
527 static klassOop _weak_reference_klass;
528 static klassOop _final_reference_klass;
529 static klassOop _phantom_reference_klass;
530 static klassOop _finalizer_klass;
531
532 static klassOop _thread_klass;
533 static klassOop _threadGroup_klass;
534 static klassOop _properties_klass;
535 static klassOop _reflect_accessible_object_klass;
536 static klassOop _reflect_field_klass;
537 static klassOop _reflect_method_klass;
538 static klassOop _reflect_constructor_klass;
539 // 1.4 reflection implementation
540 static klassOop _reflect_magic_klass;
541 static klassOop _reflect_method_accessor_klass;
542 static klassOop _reflect_constructor_accessor_klass;
543 static klassOop _reflect_delegating_classloader_klass;
544 // 1.5 annotations implementation
545 static klassOop _reflect_constant_pool_klass;
546 static klassOop _reflect_unsafe_static_field_accessor_impl_klass;
547
548 static klassOop _stringBuffer_klass;
549 static klassOop _vector_klass;
550 static klassOop _hashtable_klass;
551
552 static klassOop _stackTraceElement_klass;
553
554 static klassOop _java_nio_Buffer_klass;
555
556 static klassOop _sun_misc_AtomicLongCSImpl_klass;
557
558 // KERNEL JRE support.
559 static klassOop _sun_jkernel_DownloadManager_klass;
560 575
561 // Lazily loaded klasses 576 // Lazily loaded klasses
562 static volatile klassOop _abstract_ownable_synchronizer_klass; 577 static volatile klassOop _abstract_ownable_synchronizer_klass;
563 578
564 // Box klasses 579 // table of box klasses (int_klass, etc.)
565 static klassOop _boolean_klass;
566 static klassOop _char_klass;
567 static klassOop _float_klass;
568 static klassOop _double_klass;
569 static klassOop _byte_klass;
570 static klassOop _short_klass;
571 static klassOop _int_klass;
572 static klassOop _long_klass;
573
574 // table of same
575 static klassOop _box_klasses[T_VOID+1]; 580 static klassOop _box_klasses[T_VOID+1];
576 581
577 static oop _java_system_loader; 582 static oop _java_system_loader;
578 583
579 static bool _has_loadClassInternal; 584 static bool _has_loadClassInternal;