1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP 26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP 27 28 #include "classfile/systemDictionary.hpp" 29 #include "jvmtifiles/jvmti.h" 30 #include "oops/oop.hpp" 31 #include "runtime/os.hpp" 32 #include "utilities/utf8.hpp" 33 34 // Interface for manipulating the basic Java classes. 35 // 36 // All dependencies on layout of actual Java classes should be kept here. 37 // If the layout of any of the classes above changes the offsets must be adjusted. 38 // 39 // For most classes we hardwire the offsets for performance reasons. In certain 40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at 41 // startup since the layout here differs between JDK1.2 and JDK1.3. 42 // 43 // Note that fields (static and non-static) are arranged with oops before non-oops 44 // on a per class basis. The offsets below have to reflect this ordering. 45 // 46 // When editing the layouts please update the check_offset verification code 47 // correspondingly. The names in the enums must be identical to the actual field 48 // names in order for the verification code to work. 49 50 51 // Interface to java.lang.String objects 52 53 class java_lang_String : AllStatic { 54 private: 55 static int value_offset; 56 static int hash_offset; 57 static int coder_offset; 58 59 static bool initialized; 60 61 static Handle basic_create(int length, bool byte_arr, TRAPS); 62 63 static inline void set_coder(oop string, jbyte coder); 64 65 public: 66 67 // Coders 68 enum Coder { 69 CODER_LATIN1 = 0, 70 CODER_UTF16 = 1 71 }; 72 73 static void compute_offsets(); 74 75 // Instance creation 76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 78 static Handle create_from_str(const char* utf8_str, TRAPS); 79 static oop create_oop_from_str(const char* utf8_str, TRAPS); 80 static Handle create_from_symbol(Symbol* symbol, TRAPS); 81 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 83 84 static bool has_hash_field() { 85 assert(initialized, "Must be initialized"); 86 return (hash_offset > 0); 87 } 88 static bool has_coder_field() { 89 assert(initialized, "Must be initialized"); 90 return (coder_offset > 0); 91 } 92 93 static void set_compact_strings(bool value); 94 95 static int value_offset_in_bytes() { 96 assert(initialized && (value_offset > 0), "Must be initialized"); 97 return value_offset; 98 } 99 static int hash_offset_in_bytes() { 100 assert(initialized && (hash_offset > 0), "Must be initialized"); 101 return hash_offset; 102 } 103 static int coder_offset_in_bytes() { 104 assert(initialized && (coder_offset > 0), "Must be initialized"); 105 return coder_offset; 106 } 107 108 static inline void set_value_raw(oop string, typeArrayOop buffer); 109 static inline void set_value(oop string, typeArrayOop buffer); 110 static inline void set_hash(oop string, unsigned int hash); 111 112 // Accessors 113 static inline typeArrayOop value(oop java_string); 114 static inline unsigned int hash(oop java_string); 115 static inline bool is_latin1(oop java_string); 116 static inline int length(oop java_string); 117 static int utf8_length(oop java_string); 118 119 // String converters 120 static char* as_utf8_string(oop java_string); 121 static char* as_utf8_string(oop java_string, char* buf, int buflen); 122 static char* as_utf8_string(oop java_string, int start, int len); 123 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 124 static char* as_platform_dependent_str(Handle java_string, TRAPS); 125 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 126 // produce an ascii string with all other values quoted using \u#### 127 static char* as_quoted_ascii(oop java_string); 128 129 // Compute the hash value for a java.lang.String object which would 130 // contain the characters passed in. 131 // 132 // As the hash value used by the String object itself, in 133 // String.hashCode(). This value is normally calculated in Java code 134 // in the String.hashCode method(), but is precomputed for String 135 // objects in the shared archive file. 136 // hash P(31) from Kernighan & Ritchie 137 // 138 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 139 static unsigned int hash_code(const jchar* s, int len) { 140 unsigned int h = 0; 141 while (len-- > 0) { 142 h = 31*h + (unsigned int) *s; 143 s++; 144 } 145 return h; 146 } 147 148 static unsigned int hash_code(const jbyte* s, int len) { 149 unsigned int h = 0; 150 while (len-- > 0) { 151 h = 31*h + (((unsigned int) *s) & 0xFF); 152 s++; 153 } 154 return h; 155 } 156 157 static unsigned int hash_code(oop java_string); 158 159 static bool equals(oop java_string, jchar* chars, int len); 160 static bool equals(oop str1, oop str2); 161 162 // Conversion between '.' and '/' formats 163 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 164 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 165 166 // Conversion 167 static Symbol* as_symbol(Handle java_string, TRAPS); 168 static Symbol* as_symbol_or_null(oop java_string); 169 170 // Testers 171 static bool is_instance(oop obj); 172 static inline bool is_instance_inlined(oop obj); 173 174 // Debugging 175 static void print(oop java_string, outputStream* st); 176 friend class JavaClasses; 177 friend class StringTable; 178 }; 179 180 181 // Interface to java.lang.Class objects 182 183 #define CLASS_INJECTED_FIELDS(macro) \ 184 macro(java_lang_Class, klass, intptr_signature, false) \ 185 macro(java_lang_Class, array_klass, intptr_signature, false) \ 186 macro(java_lang_Class, oop_size, int_signature, false) \ 187 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 188 macro(java_lang_Class, protection_domain, object_signature, false) \ 189 macro(java_lang_Class, signers, object_signature, false) 190 191 class java_lang_Class : AllStatic { 192 friend class VMStructs; 193 friend class JVMCIVMStructs; 194 195 private: 196 // The fake offsets are added by the class loader when java.lang.Class is loaded 197 198 static int _klass_offset; 199 static int _array_klass_offset; 200 201 static int _oop_size_offset; 202 static int _static_oop_field_count_offset; 203 204 static int _protection_domain_offset; 205 static int _init_lock_offset; 206 static int _signers_offset; 207 static int _class_loader_offset; 208 static int _module_offset; 209 static int _component_mirror_offset; 210 211 static bool offsets_computed; 212 static int classRedefinedCount_offset; 213 214 static GrowableArray<Klass*>* _fixup_mirror_list; 215 static GrowableArray<Klass*>* _fixup_module_field_list; 216 217 static void set_init_lock(oop java_class, oop init_lock); 218 static void set_protection_domain(oop java_class, oop protection_domain); 219 static void set_class_loader(oop java_class, oop class_loader); 220 static void set_component_mirror(oop java_class, oop comp_mirror); 221 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS); 222 static void set_mirror_module_field(KlassHandle K, Handle mirror, Handle module, TRAPS); 223 public: 224 static void compute_offsets(); 225 226 // Instance creation 227 static void create_mirror(KlassHandle k, Handle class_loader, Handle module, 228 Handle protection_domain, TRAPS); 229 static void fixup_mirror(KlassHandle k, TRAPS); 230 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 231 232 static void fixup_module_field(KlassHandle k, Handle module); 233 234 // Conversion 235 static Klass* as_Klass(oop java_class); 236 static void set_klass(oop java_class, Klass* klass); 237 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 238 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 239 Klass* refk_oop = NULL; 240 BasicType result = as_BasicType(java_class, &refk_oop); 241 (*reference_klass) = KlassHandle(refk_oop); 242 return result; 243 } 244 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 245 static void print_signature(oop java_class, outputStream *st); 246 static const char* as_external_name(oop java_class); 247 // Testing 248 static bool is_instance(oop obj); 249 250 static bool is_primitive(oop java_class); 251 static BasicType primitive_type(oop java_class); 252 static oop primitive_mirror(BasicType t); 253 // JVM_NewArray support 254 static Klass* array_klass(oop java_class); 255 static void set_array_klass(oop java_class, Klass* klass); 256 // compiler support for class operations 257 static int klass_offset_in_bytes() { return _klass_offset; } 258 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 259 // Support for classRedefinedCount field 260 static int classRedefinedCount(oop the_class_mirror); 261 static void set_classRedefinedCount(oop the_class_mirror, int value); 262 263 // Support for embedded per-class oops 264 static oop protection_domain(oop java_class); 265 static oop init_lock(oop java_class); 266 static oop component_mirror(oop java_class); 267 static objArrayOop signers(oop java_class); 268 static void set_signers(oop java_class, objArrayOop signers); 269 270 static oop class_loader(oop java_class); 271 static void set_module(oop java_class, oop module); 272 static oop module(oop java_class); 273 274 static int oop_size(oop java_class); 275 static void set_oop_size(oop java_class, int size); 276 static int static_oop_field_count(oop java_class); 277 static void set_static_oop_field_count(oop java_class, int size); 278 279 static GrowableArray<Klass*>* fixup_mirror_list() { 280 return _fixup_mirror_list; 281 } 282 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 283 _fixup_mirror_list = v; 284 } 285 286 static GrowableArray<Klass*>* fixup_module_field_list() { 287 return _fixup_module_field_list; 288 } 289 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) { 290 _fixup_module_field_list = v; 291 } 292 293 // Debugging 294 friend class JavaClasses; 295 friend class InstanceKlass; // verification code accesses offsets 296 friend class ClassFileParser; // access to number_of_fake_fields 297 }; 298 299 // Interface to java.lang.Thread objects 300 301 class java_lang_Thread : AllStatic { 302 private: 303 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 304 // so we compute the offsets at startup rather than hard-wiring them. 305 static int _name_offset; 306 static int _group_offset; 307 static int _contextClassLoader_offset; 308 static int _inheritedAccessControlContext_offset; 309 static int _priority_offset; 310 static int _eetop_offset; 311 static int _daemon_offset; 312 static int _stillborn_offset; 313 static int _stackSize_offset; 314 static int _tid_offset; 315 static int _thread_status_offset; 316 static int _park_blocker_offset; 317 static int _park_event_offset ; 318 319 static void compute_offsets(); 320 321 public: 322 // Instance creation 323 static oop create(); 324 // Returns the JavaThread associated with the thread obj 325 static JavaThread* thread(oop java_thread); 326 // Set JavaThread for instance 327 static void set_thread(oop java_thread, JavaThread* thread); 328 // Name 329 static oop name(oop java_thread); 330 static void set_name(oop java_thread, oop name); 331 // Priority 332 static ThreadPriority priority(oop java_thread); 333 static void set_priority(oop java_thread, ThreadPriority priority); 334 // Thread group 335 static oop threadGroup(oop java_thread); 336 // Stillborn 337 static bool is_stillborn(oop java_thread); 338 static void set_stillborn(oop java_thread); 339 // Alive (NOTE: this is not really a field, but provides the correct 340 // definition without doing a Java call) 341 static bool is_alive(oop java_thread); 342 // Daemon 343 static bool is_daemon(oop java_thread); 344 static void set_daemon(oop java_thread); 345 // Context ClassLoader 346 static oop context_class_loader(oop java_thread); 347 // Control context 348 static oop inherited_access_control_context(oop java_thread); 349 // Stack size hint 350 static jlong stackSize(oop java_thread); 351 // Thread ID 352 static jlong thread_id(oop java_thread); 353 354 // Blocker object responsible for thread parking 355 static oop park_blocker(oop java_thread); 356 357 // Pointer to type-stable park handler, encoded as jlong. 358 // Should be set when apparently null 359 // For details, see unsafe.cpp Unsafe_Unpark 360 static jlong park_event(oop java_thread); 361 static bool set_park_event(oop java_thread, jlong ptr); 362 363 // Java Thread Status for JVMTI and M&M use. 364 // This thread status info is saved in threadStatus field of 365 // java.lang.Thread java class. 366 enum ThreadStatus { 367 NEW = 0, 368 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 369 JVMTI_THREAD_STATE_RUNNABLE, 370 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 371 JVMTI_THREAD_STATE_WAITING + 372 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 373 JVMTI_THREAD_STATE_SLEEPING, 374 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 375 JVMTI_THREAD_STATE_WAITING + 376 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 377 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 378 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 379 JVMTI_THREAD_STATE_WAITING + 380 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 381 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 382 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 383 JVMTI_THREAD_STATE_WAITING + 384 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 385 JVMTI_THREAD_STATE_PARKED, 386 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 387 JVMTI_THREAD_STATE_WAITING + 388 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 389 JVMTI_THREAD_STATE_PARKED, 390 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 391 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 392 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 393 }; 394 // Write thread status info to threadStatus field of java.lang.Thread. 395 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 396 // Read thread status info from threadStatus field of java.lang.Thread. 397 static ThreadStatus get_thread_status(oop java_thread_oop); 398 399 static const char* thread_status_name(oop java_thread_oop); 400 401 // Debugging 402 friend class JavaClasses; 403 }; 404 405 // Interface to java.lang.ThreadGroup objects 406 407 class java_lang_ThreadGroup : AllStatic { 408 private: 409 static int _parent_offset; 410 static int _name_offset; 411 static int _threads_offset; 412 static int _groups_offset; 413 static int _maxPriority_offset; 414 static int _destroyed_offset; 415 static int _daemon_offset; 416 static int _nthreads_offset; 417 static int _ngroups_offset; 418 419 static void compute_offsets(); 420 421 public: 422 // parent ThreadGroup 423 static oop parent(oop java_thread_group); 424 // name 425 static const char* name(oop java_thread_group); 426 // ("name as oop" accessor is not necessary) 427 // Number of threads in group 428 static int nthreads(oop java_thread_group); 429 // threads 430 static objArrayOop threads(oop java_thread_group); 431 // Number of threads in group 432 static int ngroups(oop java_thread_group); 433 // groups 434 static objArrayOop groups(oop java_thread_group); 435 // maxPriority in group 436 static ThreadPriority maxPriority(oop java_thread_group); 437 // Destroyed 438 static bool is_destroyed(oop java_thread_group); 439 // Daemon 440 static bool is_daemon(oop java_thread_group); 441 // Debugging 442 friend class JavaClasses; 443 }; 444 445 446 447 // Interface to java.lang.Throwable objects 448 449 class java_lang_Throwable: AllStatic { 450 friend class BacktraceBuilder; 451 friend class BacktraceIterator; 452 453 private: 454 // Offsets 455 enum { 456 hc_backtrace_offset = 0, 457 hc_detailMessage_offset = 1, 458 hc_cause_offset = 2, // New since 1.4 459 hc_stackTrace_offset = 3 // New since 1.4 460 }; 461 enum { 462 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 463 }; 464 // Trace constants 465 enum { 466 trace_methods_offset = 0, 467 trace_bcis_offset = 1, 468 trace_mirrors_offset = 2, 469 trace_cprefs_offset = 3, 470 trace_next_offset = 4, 471 trace_size = 5, 472 trace_chunk_size = 32 473 }; 474 475 static int backtrace_offset; 476 static int detailMessage_offset; 477 static int stackTrace_offset; 478 static int depth_offset; 479 static int static_unassigned_stacktrace_offset; 480 481 // StackTrace (programmatic access, new since 1.4) 482 static void clear_stacktrace(oop throwable); 483 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 484 static void set_stacktrace(oop throwable, oop st_element_array); 485 static oop unassigned_stacktrace(); 486 487 public: 488 // Backtrace 489 static oop backtrace(oop throwable); 490 static void set_backtrace(oop throwable, oop value); 491 static int depth(oop throwable); 492 static void set_depth(oop throwable, int value); 493 // Needed by JVMTI to filter out this internal field. 494 static int get_backtrace_offset() { return backtrace_offset;} 495 static int get_detailMessage_offset() { return detailMessage_offset;} 496 // Message 497 static oop message(Handle throwable); 498 static void set_message(oop throwable, oop value); 499 static Symbol* detail_message(oop throwable); 500 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 501 static void print_stack_usage(Handle stream); 502 503 static void compute_offsets(); 504 505 // Allocate space for backtrace (created but stack trace not filled in) 506 static void allocate_backtrace(Handle throwable, TRAPS); 507 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 508 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 509 // Fill in current stack trace, can cause GC 510 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 511 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 512 // Programmatic access to stack trace 513 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 514 // Printing 515 static void print(Handle throwable, outputStream* st); 516 static void print_stack_trace(Handle throwable, outputStream* st); 517 static void java_printStackTrace(Handle throwable, TRAPS); 518 // Debugging 519 friend class JavaClasses; 520 }; 521 522 523 // Interface to java.lang.reflect.AccessibleObject objects 524 525 class java_lang_reflect_AccessibleObject: AllStatic { 526 private: 527 // Note that to reduce dependencies on the JDK we compute these 528 // offsets at run-time. 529 static int override_offset; 530 531 static void compute_offsets(); 532 533 public: 534 // Accessors 535 static jboolean override(oop reflect); 536 static void set_override(oop reflect, jboolean value); 537 538 // Debugging 539 friend class JavaClasses; 540 }; 541 542 543 // Interface to java.lang.reflect.Method objects 544 545 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 546 private: 547 // Note that to reduce dependencies on the JDK we compute these 548 // offsets at run-time. 549 static int clazz_offset; 550 static int name_offset; 551 static int returnType_offset; 552 static int parameterTypes_offset; 553 static int exceptionTypes_offset; 554 static int slot_offset; 555 static int modifiers_offset; 556 static int signature_offset; 557 static int annotations_offset; 558 static int parameter_annotations_offset; 559 static int annotation_default_offset; 560 static int type_annotations_offset; 561 562 static void compute_offsets(); 563 564 public: 565 // Allocation 566 static Handle create(TRAPS); 567 568 // Accessors 569 static oop clazz(oop reflect); 570 static void set_clazz(oop reflect, oop value); 571 572 static oop name(oop method); 573 static void set_name(oop method, oop value); 574 575 static oop return_type(oop method); 576 static void set_return_type(oop method, oop value); 577 578 static oop parameter_types(oop method); 579 static void set_parameter_types(oop method, oop value); 580 581 static oop exception_types(oop method); 582 static void set_exception_types(oop method, oop value); 583 584 static int slot(oop reflect); 585 static void set_slot(oop reflect, int value); 586 587 static int modifiers(oop method); 588 static void set_modifiers(oop method, int value); 589 590 static bool has_signature_field(); 591 static oop signature(oop method); 592 static void set_signature(oop method, oop value); 593 594 static bool has_annotations_field(); 595 static oop annotations(oop method); 596 static void set_annotations(oop method, oop value); 597 598 static bool has_parameter_annotations_field(); 599 static oop parameter_annotations(oop method); 600 static void set_parameter_annotations(oop method, oop value); 601 602 static bool has_annotation_default_field(); 603 static oop annotation_default(oop method); 604 static void set_annotation_default(oop method, oop value); 605 606 static bool has_type_annotations_field(); 607 static oop type_annotations(oop method); 608 static void set_type_annotations(oop method, oop value); 609 610 // Debugging 611 friend class JavaClasses; 612 }; 613 614 615 // Interface to java.lang.reflect.Constructor objects 616 617 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 618 private: 619 // Note that to reduce dependencies on the JDK we compute these 620 // offsets at run-time. 621 static int clazz_offset; 622 static int parameterTypes_offset; 623 static int exceptionTypes_offset; 624 static int slot_offset; 625 static int modifiers_offset; 626 static int signature_offset; 627 static int annotations_offset; 628 static int parameter_annotations_offset; 629 static int type_annotations_offset; 630 631 static void compute_offsets(); 632 633 public: 634 // Allocation 635 static Handle create(TRAPS); 636 637 // Accessors 638 static oop clazz(oop reflect); 639 static void set_clazz(oop reflect, oop value); 640 641 static oop parameter_types(oop constructor); 642 static void set_parameter_types(oop constructor, oop value); 643 644 static oop exception_types(oop constructor); 645 static void set_exception_types(oop constructor, oop value); 646 647 static int slot(oop reflect); 648 static void set_slot(oop reflect, int value); 649 650 static int modifiers(oop constructor); 651 static void set_modifiers(oop constructor, int value); 652 653 static bool has_signature_field(); 654 static oop signature(oop constructor); 655 static void set_signature(oop constructor, oop value); 656 657 static bool has_annotations_field(); 658 static oop annotations(oop constructor); 659 static void set_annotations(oop constructor, oop value); 660 661 static bool has_parameter_annotations_field(); 662 static oop parameter_annotations(oop method); 663 static void set_parameter_annotations(oop method, oop value); 664 665 static bool has_type_annotations_field(); 666 static oop type_annotations(oop constructor); 667 static void set_type_annotations(oop constructor, oop value); 668 669 // Debugging 670 friend class JavaClasses; 671 }; 672 673 674 // Interface to java.lang.reflect.Field objects 675 676 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 677 private: 678 // Note that to reduce dependencies on the JDK we compute these 679 // offsets at run-time. 680 static int clazz_offset; 681 static int name_offset; 682 static int type_offset; 683 static int slot_offset; 684 static int modifiers_offset; 685 static int signature_offset; 686 static int annotations_offset; 687 static int type_annotations_offset; 688 689 static void compute_offsets(); 690 691 public: 692 // Allocation 693 static Handle create(TRAPS); 694 695 // Accessors 696 static oop clazz(oop reflect); 697 static void set_clazz(oop reflect, oop value); 698 699 static oop name(oop field); 700 static void set_name(oop field, oop value); 701 702 static oop type(oop field); 703 static void set_type(oop field, oop value); 704 705 static int slot(oop reflect); 706 static void set_slot(oop reflect, int value); 707 708 static int modifiers(oop field); 709 static void set_modifiers(oop field, int value); 710 711 static bool has_signature_field(); 712 static oop signature(oop constructor); 713 static void set_signature(oop constructor, oop value); 714 715 static bool has_annotations_field(); 716 static oop annotations(oop constructor); 717 static void set_annotations(oop constructor, oop value); 718 719 static bool has_parameter_annotations_field(); 720 static oop parameter_annotations(oop method); 721 static void set_parameter_annotations(oop method, oop value); 722 723 static bool has_annotation_default_field(); 724 static oop annotation_default(oop method); 725 static void set_annotation_default(oop method, oop value); 726 727 static bool has_type_annotations_field(); 728 static oop type_annotations(oop field); 729 static void set_type_annotations(oop field, oop value); 730 731 // Debugging 732 friend class JavaClasses; 733 }; 734 735 class java_lang_reflect_Parameter { 736 private: 737 // Note that to reduce dependencies on the JDK we compute these 738 // offsets at run-time. 739 static int name_offset; 740 static int modifiers_offset; 741 static int index_offset; 742 static int executable_offset; 743 744 static void compute_offsets(); 745 746 public: 747 // Allocation 748 static Handle create(TRAPS); 749 750 // Accessors 751 static oop name(oop field); 752 static void set_name(oop field, oop value); 753 754 static int index(oop reflect); 755 static void set_index(oop reflect, int value); 756 757 static int modifiers(oop reflect); 758 static void set_modifiers(oop reflect, int value); 759 760 static oop executable(oop constructor); 761 static void set_executable(oop constructor, oop value); 762 763 friend class JavaClasses; 764 }; 765 766 #define MODULE_INJECTED_FIELDS(macro) \ 767 macro(java_lang_reflect_Module, module_entry, intptr_signature, false) 768 769 class java_lang_reflect_Module { 770 private: 771 static int loader_offset; 772 static int name_offset; 773 static int _module_entry_offset; 774 static void compute_offsets(); 775 776 public: 777 // Allocation 778 static Handle create(Handle loader, Handle module_name, TRAPS); 779 780 // Testers 781 static bool is_instance(oop obj); 782 783 // Accessors 784 static oop loader(oop module); 785 static void set_loader(oop module, oop value); 786 787 static oop name(oop module); 788 static void set_name(oop module, oop value); 789 790 static ModuleEntry* module_entry(oop module, TRAPS); 791 static void set_module_entry(oop module, ModuleEntry* module_entry); 792 793 friend class JavaClasses; 794 }; 795 796 // Interface to jdk.internal.reflect.ConstantPool objects 797 class reflect_ConstantPool { 798 private: 799 // Note that to reduce dependencies on the JDK we compute these 800 // offsets at run-time. 801 static int _oop_offset; 802 803 static void compute_offsets(); 804 805 public: 806 // Allocation 807 static Handle create(TRAPS); 808 809 // Accessors 810 static void set_cp(oop reflect, ConstantPool* value); 811 static int oop_offset() { 812 return _oop_offset; 813 } 814 815 static ConstantPool* get_cp(oop reflect); 816 817 // Debugging 818 friend class JavaClasses; 819 }; 820 821 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 822 class reflect_UnsafeStaticFieldAccessorImpl { 823 private: 824 static int _base_offset; 825 static void compute_offsets(); 826 827 public: 828 static int base_offset() { 829 return _base_offset; 830 } 831 832 // Debugging 833 friend class JavaClasses; 834 }; 835 836 // Interface to java.lang primitive type boxing objects: 837 // - java.lang.Boolean 838 // - java.lang.Character 839 // - java.lang.Float 840 // - java.lang.Double 841 // - java.lang.Byte 842 // - java.lang.Short 843 // - java.lang.Integer 844 // - java.lang.Long 845 846 // This could be separated out into 8 individual classes. 847 848 class java_lang_boxing_object: AllStatic { 849 private: 850 enum { 851 hc_value_offset = 0 852 }; 853 static int value_offset; 854 static int long_value_offset; 855 856 static oop initialize_and_allocate(BasicType type, TRAPS); 857 public: 858 // Allocation. Returns a boxed value, or NULL for invalid type. 859 static oop create(BasicType type, jvalue* value, TRAPS); 860 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 861 static BasicType get_value(oop box, jvalue* value); 862 static BasicType set_value(oop box, jvalue* value); 863 static BasicType basic_type(oop box); 864 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 865 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 866 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 867 static void print(BasicType type, jvalue* value, outputStream* st); 868 869 static int value_offset_in_bytes(BasicType type) { 870 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 871 value_offset; 872 } 873 874 // Debugging 875 friend class JavaClasses; 876 }; 877 878 879 880 // Interface to java.lang.ref.Reference objects 881 882 class java_lang_ref_Reference: AllStatic { 883 public: 884 enum { 885 hc_referent_offset = 0, 886 hc_queue_offset = 1, 887 hc_next_offset = 2, 888 hc_discovered_offset = 3 // Is not last, see SoftRefs. 889 }; 890 891 static int referent_offset; 892 static int queue_offset; 893 static int next_offset; 894 static int discovered_offset; 895 static int number_of_fake_oop_fields; 896 897 // Accessors 898 static inline oop referent(oop ref); 899 static inline void set_referent(oop ref, oop value); 900 static inline void set_referent_raw(oop ref, oop value); 901 static inline HeapWord* referent_addr(oop ref); 902 static inline oop next(oop ref); 903 static inline void set_next(oop ref, oop value); 904 static inline void set_next_raw(oop ref, oop value); 905 static inline HeapWord* next_addr(oop ref); 906 static inline oop discovered(oop ref); 907 static inline void set_discovered(oop ref, oop value); 908 static inline void set_discovered_raw(oop ref, oop value); 909 static inline HeapWord* discovered_addr(oop ref); 910 }; 911 912 913 // Interface to java.lang.ref.SoftReference objects 914 915 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 916 public: 917 enum { 918 // The timestamp is a long field and may need to be adjusted for alignment. 919 hc_timestamp_offset = hc_discovered_offset + 1 920 }; 921 enum { 922 hc_static_clock_offset = 0 923 }; 924 925 static int timestamp_offset; 926 static int static_clock_offset; 927 928 // Accessors 929 static jlong timestamp(oop ref); 930 931 // Accessors for statics 932 static jlong clock(); 933 static void set_clock(jlong value); 934 }; 935 936 // Interface to java.lang.invoke.MethodHandle objects 937 938 class MethodHandleEntry; 939 940 class java_lang_invoke_MethodHandle: AllStatic { 941 friend class JavaClasses; 942 943 private: 944 static int _type_offset; // the MethodType of this MH 945 static int _form_offset; // the LambdaForm of this MH 946 947 static void compute_offsets(); 948 949 public: 950 // Accessors 951 static oop type(oop mh); 952 static void set_type(oop mh, oop mtype); 953 954 static oop form(oop mh); 955 static void set_form(oop mh, oop lform); 956 957 // Testers 958 static bool is_subclass(Klass* klass) { 959 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 960 } 961 static bool is_instance(oop obj); 962 963 // Accessors for code generation: 964 static int type_offset_in_bytes() { return _type_offset; } 965 static int form_offset_in_bytes() { return _form_offset; } 966 }; 967 968 // Interface to java.lang.invoke.DirectMethodHandle objects 969 970 class java_lang_invoke_DirectMethodHandle: AllStatic { 971 friend class JavaClasses; 972 973 private: 974 static int _member_offset; // the MemberName of this DMH 975 976 static void compute_offsets(); 977 978 public: 979 // Accessors 980 static oop member(oop mh); 981 982 // Testers 983 static bool is_subclass(Klass* klass) { 984 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 985 } 986 static bool is_instance(oop obj); 987 988 // Accessors for code generation: 989 static int member_offset_in_bytes() { return _member_offset; } 990 }; 991 992 // Interface to java.lang.invoke.LambdaForm objects 993 // (These are a private interface for managing adapter code generation.) 994 995 class java_lang_invoke_LambdaForm: AllStatic { 996 friend class JavaClasses; 997 998 private: 999 static int _vmentry_offset; // type is MemberName 1000 1001 static void compute_offsets(); 1002 1003 public: 1004 // Accessors 1005 static oop vmentry(oop lform); 1006 static void set_vmentry(oop lform, oop invoker); 1007 1008 // Testers 1009 static bool is_subclass(Klass* klass) { 1010 return SystemDictionary::LambdaForm_klass() != NULL && 1011 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1012 } 1013 static bool is_instance(oop obj); 1014 1015 // Accessors for code generation: 1016 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1017 }; 1018 1019 1020 // Interface to java.lang.invoke.MemberName objects 1021 // (These are a private interface for Java code to query the class hierarchy.) 1022 1023 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1024 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1025 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1026 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1027 1028 class java_lang_invoke_MemberName: AllStatic { 1029 friend class JavaClasses; 1030 1031 private: 1032 // From java.lang.invoke.MemberName: 1033 // private Class<?> clazz; // class in which the method is defined 1034 // private String name; // may be null if not yet materialized 1035 // private Object type; // may be null if not yet materialized 1036 // private int flags; // modifier bits; see reflect.Modifier 1037 // private intptr vmtarget; // VM-specific target value 1038 // private intptr_t vmindex; // member index within class or interface 1039 static int _clazz_offset; 1040 static int _name_offset; 1041 static int _type_offset; 1042 static int _flags_offset; 1043 static int _vmtarget_offset; 1044 static int _vmloader_offset; 1045 static int _vmindex_offset; 1046 1047 static void compute_offsets(); 1048 1049 public: 1050 // Accessors 1051 static oop clazz(oop mname); 1052 static void set_clazz(oop mname, oop clazz); 1053 1054 static oop type(oop mname); 1055 static void set_type(oop mname, oop type); 1056 1057 static oop name(oop mname); 1058 static void set_name(oop mname, oop name); 1059 1060 static int flags(oop mname); 1061 static void set_flags(oop mname, int flags); 1062 1063 static Metadata* vmtarget(oop mname); 1064 static void set_vmtarget(oop mname, Metadata* target); 1065 1066 static intptr_t vmindex(oop mname); 1067 static void set_vmindex(oop mname, intptr_t index); 1068 1069 // Testers 1070 static bool is_subclass(Klass* klass) { 1071 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1072 } 1073 static bool is_instance(oop obj); 1074 1075 static bool is_method(oop obj); 1076 1077 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1078 enum { 1079 MN_IS_METHOD = 0x00010000, // method (not constructor) 1080 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1081 MN_IS_FIELD = 0x00040000, // field 1082 MN_IS_TYPE = 0x00080000, // nested type 1083 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1084 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1085 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1086 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1087 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1088 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1089 }; 1090 1091 // Accessors for code generation: 1092 static int clazz_offset_in_bytes() { return _clazz_offset; } 1093 static int type_offset_in_bytes() { return _type_offset; } 1094 static int name_offset_in_bytes() { return _name_offset; } 1095 static int flags_offset_in_bytes() { return _flags_offset; } 1096 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1097 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1098 }; 1099 1100 1101 // Interface to java.lang.invoke.MethodType objects 1102 1103 class java_lang_invoke_MethodType: AllStatic { 1104 friend class JavaClasses; 1105 1106 private: 1107 static int _rtype_offset; 1108 static int _ptypes_offset; 1109 1110 static void compute_offsets(); 1111 1112 public: 1113 // Accessors 1114 static oop rtype(oop mt); 1115 static objArrayOop ptypes(oop mt); 1116 1117 static oop ptype(oop mt, int index); 1118 static int ptype_count(oop mt); 1119 1120 static int ptype_slot_count(oop mt); // extra counts for long/double 1121 static int rtype_slot_count(oop mt); // extra counts for long/double 1122 1123 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1124 static void print_signature(oop mt, outputStream* st); 1125 1126 static bool is_instance(oop obj); 1127 1128 static bool equals(oop mt1, oop mt2); 1129 1130 // Accessors for code generation: 1131 static int rtype_offset_in_bytes() { return _rtype_offset; } 1132 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1133 }; 1134 1135 1136 // Interface to java.lang.invoke.CallSite objects 1137 1138 class java_lang_invoke_CallSite: AllStatic { 1139 friend class JavaClasses; 1140 1141 private: 1142 static int _target_offset; 1143 static int _context_offset; 1144 1145 static void compute_offsets(); 1146 1147 public: 1148 // Accessors 1149 static oop target( oop site); 1150 static void set_target( oop site, oop target); 1151 static void set_target_volatile( oop site, oop target); 1152 1153 static oop context(oop site); 1154 1155 // Testers 1156 static bool is_subclass(Klass* klass) { 1157 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1158 } 1159 static bool is_instance(oop obj); 1160 1161 // Accessors for code generation: 1162 static int target_offset_in_bytes() { return _target_offset; } 1163 }; 1164 1165 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1166 1167 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1168 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1169 1170 class DependencyContext; 1171 1172 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1173 friend class JavaClasses; 1174 1175 private: 1176 static int _vmdependencies_offset; 1177 1178 static void compute_offsets(); 1179 1180 public: 1181 // Accessors 1182 static DependencyContext vmdependencies(oop context); 1183 1184 // Testers 1185 static bool is_subclass(Klass* klass) { 1186 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1187 } 1188 static bool is_instance(oop obj); 1189 }; 1190 1191 // Interface to java.security.AccessControlContext objects 1192 1193 class java_security_AccessControlContext: AllStatic { 1194 private: 1195 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1196 // so we compute the offsets at startup rather than hard-wiring them. 1197 static int _context_offset; 1198 static int _privilegedContext_offset; 1199 static int _isPrivileged_offset; 1200 static int _isAuthorized_offset; 1201 1202 static void compute_offsets(); 1203 public: 1204 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1205 1206 static bool is_authorized(Handle context); 1207 1208 // Debugging/initialization 1209 friend class JavaClasses; 1210 }; 1211 1212 1213 // Interface to java.lang.ClassLoader objects 1214 1215 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1216 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1217 1218 class java_lang_ClassLoader : AllStatic { 1219 private: 1220 // The fake offsets are added by the class loader when java.lang.Class is loaded 1221 enum { 1222 hc_parent_offset = 0 1223 }; 1224 static int _loader_data_offset; 1225 static bool offsets_computed; 1226 static int parent_offset; 1227 static int parallelCapable_offset; 1228 static int name_offset; 1229 static int unnamedModule_offset; 1230 1231 public: 1232 static void compute_offsets(); 1233 1234 static ClassLoaderData** loader_data_addr(oop loader); 1235 static ClassLoaderData* loader_data(oop loader); 1236 1237 static oop parent(oop loader); 1238 static oop name(oop loader); 1239 static bool isAncestor(oop loader, oop cl); 1240 1241 // Support for parallelCapable field 1242 static bool parallelCapable(oop the_class_mirror); 1243 1244 static bool is_trusted_loader(oop loader); 1245 1246 // Fix for 4474172 1247 static oop non_reflection_class_loader(oop loader); 1248 1249 // Testers 1250 static bool is_subclass(Klass* klass) { 1251 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1252 } 1253 static bool is_instance(oop obj); 1254 1255 static oop unnamedModule(oop loader); 1256 1257 // Debugging 1258 friend class JavaClasses; 1259 friend class ClassFileParser; // access to number_of_fake_fields 1260 }; 1261 1262 1263 // Interface to java.lang.System objects 1264 1265 class java_lang_System : AllStatic { 1266 private: 1267 enum { 1268 hc_static_in_offset = 0, 1269 hc_static_out_offset = 1, 1270 hc_static_err_offset = 2, 1271 hc_static_security_offset = 3 1272 }; 1273 1274 static int static_in_offset; 1275 static int static_out_offset; 1276 static int static_err_offset; 1277 static int static_security_offset; 1278 1279 public: 1280 static int in_offset_in_bytes(); 1281 static int out_offset_in_bytes(); 1282 static int err_offset_in_bytes(); 1283 1284 static bool has_security_manager(); 1285 1286 // Debugging 1287 friend class JavaClasses; 1288 }; 1289 1290 1291 // Interface to java.lang.StackTraceElement objects 1292 1293 class java_lang_StackTraceElement: AllStatic { 1294 private: 1295 enum { 1296 hc_classOrLoaderModuleClassName_offset = 0, 1297 hc_classLoaderName_offset = 1, 1298 hc_moduleName_offset = 2, 1299 hc_moduleVersion_offset = 3, 1300 hc_declaringClass_offset = 4, 1301 hc_methodName_offset = 5, 1302 hc_fileName_offset = 6, 1303 hc_lineNumber_offset = 7 1304 }; 1305 1306 static int classOrLoaderModuleClassName_offset; 1307 static int classLoaderName_offset; 1308 static int moduleName_offset; 1309 static int moduleVersion_offset; 1310 static int declaringClass_offset; 1311 static int methodName_offset; 1312 static int fileName_offset; 1313 static int lineNumber_offset; 1314 1315 // Setters 1316 static void set_classLoaderName(oop element, oop value); 1317 static void set_moduleName(oop element, oop value); 1318 static void set_moduleVersion(oop element, oop value); 1319 static void set_declaringClass(oop element, oop value); 1320 static void set_methodName(oop element, oop value); 1321 static void set_fileName(oop element, oop value); 1322 static void set_lineNumber(oop element, int value); 1323 static void set_declaringClassObject(oop element, oop value); 1324 1325 public: 1326 // Create an instance of StackTraceElement 1327 static oop create(const methodHandle& method, int bci, TRAPS); 1328 1329 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1330 int version, int bci, int cpref, TRAPS); 1331 1332 // Debugging 1333 friend class JavaClasses; 1334 }; 1335 1336 1337 class Backtrace: AllStatic { 1338 public: 1339 // Helper backtrace functions to store bci|version together. 1340 static int merge_bci_and_version(int bci, int version); 1341 static int merge_mid_and_cpref(int mid, int cpref); 1342 static int bci_at(unsigned int merged); 1343 static int version_at(unsigned int merged); 1344 static int mid_at(unsigned int merged); 1345 static int cpref_at(unsigned int merged); 1346 static int get_line_number(const methodHandle& method, int bci); 1347 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1348 1349 // Debugging 1350 friend class JavaClasses; 1351 }; 1352 1353 // Interface to java.lang.StackFrameInfo objects 1354 1355 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1356 macro(java_lang_StackFrameInfo, version, short_signature, false) 1357 1358 class java_lang_StackFrameInfo: AllStatic { 1359 private: 1360 static int _declaringClass_offset; 1361 static int _memberName_offset; 1362 static int _bci_offset; 1363 static int _version_offset; 1364 1365 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1366 1367 public: 1368 // Setters 1369 static void set_declaringClass(oop info, oop value); 1370 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci); 1371 static void set_bci(oop info, int value); 1372 1373 static void set_version(oop info, short value); 1374 1375 static void compute_offsets(); 1376 1377 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1378 1379 // Debugging 1380 friend class JavaClasses; 1381 }; 1382 1383 class java_lang_LiveStackFrameInfo: AllStatic { 1384 private: 1385 static int _monitors_offset; 1386 static int _locals_offset; 1387 static int _operands_offset; 1388 1389 public: 1390 static void set_monitors(oop info, oop value); 1391 static void set_locals(oop info, oop value); 1392 static void set_operands(oop info, oop value); 1393 1394 static void compute_offsets(); 1395 1396 // Debugging 1397 friend class JavaClasses; 1398 }; 1399 1400 // Interface to java.lang.AssertionStatusDirectives objects 1401 1402 class java_lang_AssertionStatusDirectives: AllStatic { 1403 private: 1404 enum { 1405 hc_classes_offset, 1406 hc_classEnabled_offset, 1407 hc_packages_offset, 1408 hc_packageEnabled_offset, 1409 hc_deflt_offset 1410 }; 1411 1412 static int classes_offset; 1413 static int classEnabled_offset; 1414 static int packages_offset; 1415 static int packageEnabled_offset; 1416 static int deflt_offset; 1417 1418 public: 1419 // Setters 1420 static void set_classes(oop obj, oop val); 1421 static void set_classEnabled(oop obj, oop val); 1422 static void set_packages(oop obj, oop val); 1423 static void set_packageEnabled(oop obj, oop val); 1424 static void set_deflt(oop obj, bool val); 1425 // Debugging 1426 friend class JavaClasses; 1427 }; 1428 1429 1430 class java_nio_Buffer: AllStatic { 1431 private: 1432 static int _limit_offset; 1433 1434 public: 1435 static int limit_offset(); 1436 static void compute_offsets(); 1437 }; 1438 1439 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1440 private: 1441 static int _owner_offset; 1442 public: 1443 static void initialize(TRAPS); 1444 static oop get_owner_threadObj(oop obj); 1445 }; 1446 1447 // Use to declare fields that need to be injected into Java classes 1448 // for the JVM to use. The name_index and signature_index are 1449 // declared in vmSymbols. The may_be_java flag is used to declare 1450 // fields that might already exist in Java but should be injected if 1451 // they don't. Otherwise the field is unconditionally injected and 1452 // the JVM uses the injected one. This is to ensure that name 1453 // collisions don't occur. In general may_be_java should be false 1454 // unless there's a good reason. 1455 1456 class InjectedField { 1457 public: 1458 const SystemDictionary::WKID klass_id; 1459 const vmSymbols::SID name_index; 1460 const vmSymbols::SID signature_index; 1461 const bool may_be_java; 1462 1463 1464 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1465 Symbol* name() const { return lookup_symbol(name_index); } 1466 Symbol* signature() const { return lookup_symbol(signature_index); } 1467 1468 int compute_offset(); 1469 1470 // Find the Symbol for this index 1471 static Symbol* lookup_symbol(int symbol_index) { 1472 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1473 } 1474 }; 1475 1476 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1477 klass##_##name##_enum, 1478 1479 #define ALL_INJECTED_FIELDS(macro) \ 1480 CLASS_INJECTED_FIELDS(macro) \ 1481 CLASSLOADER_INJECTED_FIELDS(macro) \ 1482 MEMBERNAME_INJECTED_FIELDS(macro) \ 1483 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1484 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1485 MODULE_INJECTED_FIELDS(macro) 1486 1487 // Interface to hard-coded offset checking 1488 1489 class JavaClasses : AllStatic { 1490 private: 1491 1492 static InjectedField _injected_fields[]; 1493 1494 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1495 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1496 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1497 1498 public: 1499 enum InjectedFieldID { 1500 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1501 MAX_enum 1502 }; 1503 1504 static int compute_injected_offset(InjectedFieldID id); 1505 1506 static void compute_hard_coded_offsets(); 1507 static void compute_offsets(); 1508 static void check_offsets() PRODUCT_RETURN; 1509 1510 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1511 }; 1512 1513 #undef DECLARE_INJECTED_FIELD_ENUM 1514 1515 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP