1 /* 2 * Copyright (c) 1997, 2025, 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_CLASSFILE_JAVACLASSES_HPP 26 #define SHARE_CLASSFILE_JAVACLASSES_HPP 27 28 #include "classfile/vmClasses.hpp" 29 #include "oops/instanceKlass.hpp" 30 #include "oops/oopsHierarchy.hpp" 31 #include "oops/symbol.hpp" 32 #include "runtime/handles.hpp" 33 #include "runtime/os.hpp" 34 #include "utilities/macros.hpp" 35 #include "utilities/utf8.hpp" 36 #include "utilities/vmEnums.hpp" 37 38 class JvmtiThreadState; 39 class RecordComponent; 40 class SerializeClosure; 41 class ObjectWaiter; 42 class ObjectMonitor; 43 44 #define CHECK_INIT(offset) assert(offset != 0, "should be initialized"); return offset; 45 46 // Interface to java.lang.Object objects 47 48 class java_lang_Object : AllStatic { 49 public: 50 static void register_natives(TRAPS); 51 }; 52 53 // Interface to java.lang.String objects 54 55 // The flags field is a collection of bits representing boolean values used 56 // internally by the VM. 57 #define STRING_INJECTED_FIELDS(macro) \ 58 macro(java_lang_String, flags, byte_signature, false) 59 60 class java_lang_String : AllStatic { 61 private: 62 static int _value_offset; 63 static int _hash_offset; 64 static int _hashIsZero_offset; 65 static int _coder_offset; 66 static int _flags_offset; 67 68 static bool _initialized; 69 70 static Handle basic_create(int length, bool byte_arr, TRAPS); 71 72 static inline void set_coder(oop string, jbyte coder); 73 74 // Bitmasks for values in the injected flags field. 75 static const uint8_t _deduplication_forbidden_mask = 1 << 0; 76 static const uint8_t _deduplication_requested_mask = 1 << 1; 77 78 static int flags_offset() { CHECK_INIT(_flags_offset); } 79 // Return the address of the injected flags field. 80 static inline uint8_t* flags_addr(oop java_string); 81 // Test whether the designated bit of the injected flags field is set. 82 static inline bool is_flag_set(oop java_string, uint8_t flag_mask); 83 // Atomically test and set the designated bit of the injected flags field, 84 // returning true if the bit was already set. 85 static bool test_and_set_flag(oop java_string, uint8_t flag_mask); 86 87 static inline unsigned int hash_code_impl(oop java_string, bool update); 88 89 public: 90 91 // Coders 92 enum Coder { 93 CODER_LATIN1 = 0, 94 CODER_UTF16 = 1 95 }; 96 97 static void compute_offsets(); 98 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 99 100 // Instance creation 101 static Handle create_from_unicode(const jchar* unicode, int len, TRAPS); 102 static oop create_oop_from_unicode(const jchar* unicode, int len, TRAPS); 103 static Handle create_from_str(const char* utf8_str, TRAPS); 104 static oop create_oop_from_str(const char* utf8_str, TRAPS); 105 static Handle create_from_symbol(const Symbol* symbol, TRAPS); 106 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 107 108 static void set_compact_strings(bool value); 109 110 static int value_offset() { CHECK_INIT(_value_offset); } 111 static int coder_offset() { CHECK_INIT(_coder_offset); } 112 113 static inline void set_value(oop string, typeArrayOop buffer); 114 115 // Set the deduplication_forbidden flag true. This flag is sticky; once 116 // set it never gets cleared. This is set when a String is interned in 117 // the StringTable, to prevent string deduplication from changing the 118 // String's value array. 119 static inline void set_deduplication_forbidden(oop java_string); 120 121 // Test and set the deduplication_requested flag. Returns the old value 122 // of the flag. This flag is sticky; once set it never gets cleared. 123 // Some GCs may use this flag when deciding whether to request 124 // deduplication of a String, to avoid multiple requests for the same 125 // object. 126 static inline bool test_and_set_deduplication_requested(oop java_string); 127 128 // Accessors 129 static inline typeArrayOop value(oop java_string); 130 static inline typeArrayOop value_no_keepalive(oop java_string); 131 static inline bool hash_is_set(oop string); 132 static inline bool is_latin1(oop java_string); 133 static inline bool deduplication_forbidden(oop java_string); 134 static inline bool deduplication_requested(oop java_string); 135 static inline int length(oop java_string); 136 static inline int length(oop java_string, typeArrayOop string_value); 137 static size_t utf8_length(oop java_string); 138 static size_t utf8_length(oop java_string, typeArrayOop string_value); 139 // Legacy variants that truncate the length if needed 140 static int utf8_length_as_int(oop java_string); 141 static int utf8_length_as_int(oop java_string, typeArrayOop string_value); 142 143 // String converters 144 static char* as_utf8_string(oop java_string); 145 // `length` is set to the length of the utf8 sequence. 146 static char* as_utf8_string(oop java_string, size_t& length); 147 static char* as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& length); 148 static char* as_utf8_string(oop java_string, char* buf, size_t buflen); 149 static char* as_utf8_string(oop java_string, int start, int len); 150 static char* as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen); 151 static char* as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen); 152 static char* as_platform_dependent_str(Handle java_string, TRAPS); 153 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 154 static jchar* as_unicode_string_or_null(oop java_string, int& length); 155 // produce an ascii string with all other values quoted using \u#### 156 static char* as_quoted_ascii(oop java_string); 157 158 // Compute the hash value for a java.lang.String object which would 159 // contain the characters passed in. 160 // 161 // As the hash value used by the String object itself, in 162 // String.hashCode(). This value is normally calculated in Java code 163 // in the String.hashCode method(), but is precomputed for String 164 // objects in the shared archive file. 165 // hash P(31) from Kernighan & Ritchie 166 // 167 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 168 static unsigned int hash_code(const jchar* s, int len) { 169 unsigned int h = 0; 170 while (len-- > 0) { 171 h = 31*h + (unsigned int) *s; 172 s++; 173 } 174 return h; 175 } 176 177 static unsigned int hash_code(const jbyte* s, int len) { 178 unsigned int h = 0; 179 while (len-- > 0) { 180 h = 31*h + (((unsigned int) *s) & 0xFF); 181 s++; 182 } 183 return h; 184 } 185 186 static unsigned int hash_code(const char* utf8_str, size_t utf8_len) { 187 unsigned int h = 0; 188 int unicode_length = UTF8::unicode_length(utf8_str, utf8_len); 189 190 jchar c; 191 while (unicode_length-- > 0) { 192 utf8_str = UTF8::next(utf8_str, &c); 193 h = 31 * h + ((unsigned int)c); 194 } 195 return h; 196 } 197 198 static unsigned int hash_code(oop java_string); 199 static unsigned int hash_code_noupdate(oop java_string); 200 201 // Compare strings (of different types/encodings), length is the string (array) length 202 static bool equals(oop java_string, const jchar* chars, int len); 203 static bool equals(oop java_string, const char* utf8_str, size_t utf8_len); 204 static bool equals(oop str1, oop str2); 205 static inline bool value_equals(typeArrayOop str_value1, typeArrayOop str_value2); 206 207 // Conversion between '.' and '/' formats, and allocate a String from the result. 208 static Handle externalize_classname(Symbol* java_name, TRAPS); 209 210 // Conversion 211 static Symbol* as_symbol(oop java_string); 212 static Symbol* as_symbol_or_null(oop java_string); 213 214 // Tester 215 static inline bool is_instance(oop obj); 216 217 // Debugging 218 static void print(oop java_string, outputStream* st, int max_length = MaxStringPrintSize); 219 friend class JavaClasses; 220 friend class StringTable; 221 }; 222 223 224 // Interface to java.lang.Class objects 225 226 #define CLASS_INJECTED_FIELDS(macro) \ 227 macro(java_lang_Class, klass, intptr_signature, false) \ 228 macro(java_lang_Class, array_klass, intptr_signature, false) \ 229 macro(java_lang_Class, oop_size, int_signature, false) \ 230 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 231 macro(java_lang_Class, source_file, object_signature, false) \ 232 macro(java_lang_Class, init_lock, object_signature, false) 233 234 class java_lang_Class : AllStatic { 235 friend class VMStructs; 236 friend class JVMCIVMStructs; 237 friend class HeapShared; 238 239 private: 240 241 // The fake offsets are added by the class loader when java.lang.Class is loaded 242 243 static int _klass_offset; 244 static int _array_klass_offset; 245 246 static int _oop_size_offset; 247 static int _static_oop_field_count_offset; 248 249 static int _protection_domain_offset; 250 static int _init_lock_offset; 251 static int _signers_offset; 252 static int _class_loader_offset; 253 static int _module_offset; 254 static int _component_mirror_offset; 255 static int _name_offset; 256 static int _source_file_offset; 257 static int _classData_offset; 258 static int _classRedefinedCount_offset; 259 static int _reflectionData_offset; 260 static int _modifiers_offset; 261 static int _is_primitive_offset; 262 static int _raw_access_flags_offset; 263 264 static bool _offsets_computed; 265 266 static GrowableArray<Klass*>* _fixup_mirror_list; 267 static GrowableArray<Klass*>* _fixup_module_field_list; 268 269 static void set_init_lock(oop java_class, oop init_lock); 270 static void set_protection_domain(oop java_class, oop protection_domain); 271 static void set_class_loader(oop java_class, oop class_loader); 272 static void set_component_mirror(oop java_class, oop comp_mirror); 273 static void initialize_mirror_fields(InstanceKlass* ik, Handle mirror, Handle protection_domain, 274 Handle classData, TRAPS); 275 static void set_mirror_module_field(JavaThread* current, Klass* K, Handle mirror, Handle module); 276 public: 277 static void allocate_fixup_lists(); 278 static void compute_offsets(); 279 280 // Instance creation 281 static void allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 282 Handle& mirror, Handle& comp_mirror, TRAPS); // returns mirror and comp_mirror 283 static void create_mirror(Klass* k, Handle class_loader, Handle module, 284 Handle protection_domain, Handle classData, TRAPS); 285 static void fixup_mirror(Klass* k, TRAPS); 286 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 287 288 // Archiving 289 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 290 static void create_scratch_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN; 291 static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module, 292 Handle protection_domain, 293 TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false); 294 295 static void fixup_module_field(Klass* k, Handle module); 296 297 // Conversion -- java_class must not be null. The return value is null only if java_class is a primitive type. 298 static Klass* as_Klass(oop java_class); 299 static InstanceKlass* as_InstanceKlass(oop java_class); 300 301 static void set_klass(oop java_class, Klass* klass); 302 static BasicType as_BasicType(oop java_class, Klass** reference_klass = nullptr); 303 static Symbol* as_signature(oop java_class, bool intern_if_not_found); 304 static void print_signature(oop java_class, outputStream *st); 305 static const char* as_external_name(oop java_class); 306 // Testing 307 static bool is_instance(oop obj); 308 309 static bool is_primitive(oop java_class); 310 static void set_is_primitive(oop java_class); 311 static BasicType primitive_type(oop java_class); 312 static oop primitive_mirror(BasicType t); 313 // JVM_NewArray support 314 static Klass* array_klass_acquire(oop java_class); 315 static void release_set_array_klass(oop java_class, Klass* klass); 316 // compiler support for class operations 317 static int klass_offset() { CHECK_INIT(_klass_offset); } 318 static int array_klass_offset() { CHECK_INIT(_array_klass_offset); } 319 // Support for classRedefinedCount field 320 static int classRedefinedCount(oop the_class_mirror); 321 static void set_classRedefinedCount(oop the_class_mirror, int value); 322 323 // Support for embedded per-class oops 324 static oop protection_domain(oop java_class); 325 static oop init_lock(oop java_class); 326 static void clear_init_lock(oop java_class) { 327 set_init_lock(java_class, nullptr); 328 } 329 static oop component_mirror(oop java_class); 330 static int component_mirror_offset() { return _component_mirror_offset; } 331 static objArrayOop signers(oop java_class); 332 static oop class_data(oop java_class); 333 static void set_class_data(oop java_class, oop classData); 334 335 static oop reflection_data(oop java_class); 336 static void set_reflection_data(oop java_class, oop reflection_data); 337 static bool has_reflection_data(oop java_class); 338 static int reflection_data_offset() { return _reflectionData_offset; } 339 340 static oop class_loader(oop java_class); 341 static void set_module(oop java_class, oop module); 342 static oop module(oop java_class); 343 344 static oop name(Handle java_class, TRAPS); 345 346 static oop source_file(oop java_class); 347 static void set_source_file(oop java_class, oop source_file); 348 349 static int modifiers(oop java_class); 350 static void set_modifiers(oop java_class, u2 value); 351 352 static int raw_access_flags(oop java_class); 353 static void set_raw_access_flags(oop java_class, u2 value); 354 355 static size_t oop_size(oop java_class); 356 static void set_oop_size(HeapWord* java_class, size_t size); 357 static int static_oop_field_count(oop java_class); 358 static void set_static_oop_field_count(oop java_class, int size); 359 360 static GrowableArray<Klass*>* fixup_mirror_list() { 361 return _fixup_mirror_list; 362 } 363 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 364 _fixup_mirror_list = v; 365 } 366 367 static GrowableArray<Klass*>* fixup_module_field_list() { 368 return _fixup_module_field_list; 369 } 370 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) { 371 _fixup_module_field_list = v; 372 } 373 374 // Debugging 375 friend class JavaClasses; 376 }; 377 378 // Interface to java.lang.Thread objects 379 380 #define THREAD_INJECTED_FIELDS(macro) \ 381 macro(java_lang_Thread, jvmti_thread_state, intptr_signature, false) \ 382 macro(java_lang_Thread, jvmti_VTMS_transition_disable_count, int_signature, false) \ 383 macro(java_lang_Thread, jvmti_is_in_VTMS_transition, bool_signature, false) \ 384 JFR_ONLY(macro(java_lang_Thread, jfr_epoch, short_signature, false)) 385 386 class java_lang_Thread : AllStatic { 387 friend class java_lang_VirtualThread; 388 friend class JVMCIVMStructs; 389 private: 390 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 391 // so we compute the offsets at startup rather than hard-wiring them. 392 static int _holder_offset; 393 static int _name_offset; 394 static int _contextClassLoader_offset; 395 static int _eetop_offset; 396 static int _jvmti_thread_state_offset; 397 static int _jvmti_VTMS_transition_disable_count_offset; 398 static int _jvmti_is_in_VTMS_transition_offset; 399 static int _interrupted_offset; 400 static int _interruptLock_offset; 401 static int _tid_offset; 402 static int _continuation_offset; 403 static int _park_blocker_offset; 404 static int _scopedValueBindings_offset; 405 JFR_ONLY(static int _jfr_epoch_offset;) 406 407 static void compute_offsets(); 408 409 public: 410 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 411 412 // Returns the JavaThread associated with the thread obj 413 static JavaThread* thread(oop java_thread); 414 static JavaThread* thread_acquire(oop java_thread); 415 // Set JavaThread for instance 416 static void set_thread(oop java_thread, JavaThread* thread); 417 static void release_set_thread(oop java_thread, JavaThread* thread); 418 // FieldHolder 419 static oop holder(oop java_thread); 420 // interruptLock 421 static oop interrupt_lock(oop java_thread); 422 // Interrupted status 423 static bool interrupted(oop java_thread); 424 static void set_interrupted(oop java_thread, bool val); 425 // Name 426 static oop name(oop java_thread); 427 static void set_name(oop java_thread, oop name); 428 // Priority 429 static ThreadPriority priority(oop java_thread); 430 static void set_priority(oop java_thread, ThreadPriority priority); 431 // Thread group 432 static oop threadGroup(oop java_thread); 433 // Alive (NOTE: this is not really a field, but provides the correct 434 // definition without doing a Java call) 435 static bool is_alive(oop java_thread); 436 // Daemon 437 static bool is_daemon(oop java_thread); 438 static void set_daemon(oop java_thread); 439 // Context ClassLoader 440 static oop context_class_loader(oop java_thread); 441 // Stack size hint 442 static jlong stackSize(oop java_thread); 443 // Thread ID 444 static int64_t thread_id(oop java_thread); 445 static ByteSize thread_id_offset(); 446 // Continuation 447 static inline oop continuation(oop java_thread); 448 449 static JvmtiThreadState* jvmti_thread_state(oop java_thread); 450 static void set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state); 451 static int VTMS_transition_disable_count(oop java_thread); 452 static void inc_VTMS_transition_disable_count(oop java_thread); 453 static void dec_VTMS_transition_disable_count(oop java_thread); 454 static bool is_in_VTMS_transition(oop java_thread); 455 static void set_is_in_VTMS_transition(oop java_thread, bool val); 456 static int is_in_VTMS_transition_offset(); 457 458 // Clear all scoped value bindings on error 459 static void clear_scopedValueBindings(oop java_thread); 460 461 // Blocker object responsible for thread parking 462 static oop park_blocker(oop java_thread); 463 464 // Write thread status info to threadStatus field of java.lang.Thread. 465 static void set_thread_status(oop java_thread_oop, JavaThreadStatus status); 466 // Read thread status info from threadStatus field of java.lang.Thread. 467 static JavaThreadStatus get_thread_status(oop java_thread_oop); 468 469 static const char* thread_status_name(oop java_thread_oop); 470 471 // Fill in current stack trace, can cause GC 472 static oop async_get_stack_trace(jobject jthread, TRAPS); 473 474 JFR_ONLY(static u2 jfr_epoch(oop java_thread);) 475 JFR_ONLY(static void set_jfr_epoch(oop java_thread, u2 epoch);) 476 JFR_ONLY(static int jfr_epoch_offset() { CHECK_INIT(_jfr_epoch_offset); }) 477 478 // Debugging 479 friend class JavaClasses; 480 }; 481 482 // Interface to java.lang.Thread$FieldHolder objects 483 484 class java_lang_Thread_FieldHolder : AllStatic { 485 private: 486 static int _group_offset; 487 static int _priority_offset; 488 static int _stackSize_offset; 489 static int _daemon_offset; 490 static int _thread_status_offset; 491 492 static void compute_offsets(); 493 494 public: 495 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 496 497 static oop threadGroup(oop holder); 498 499 static ThreadPriority priority(oop holder); 500 static void set_priority(oop holder, ThreadPriority priority); 501 502 static jlong stackSize(oop holder); 503 504 static bool is_daemon(oop holder); 505 static void set_daemon(oop holder, bool val); 506 507 static void set_thread_status(oop holder, JavaThreadStatus status); 508 static JavaThreadStatus get_thread_status(oop holder); 509 510 friend class JavaClasses; 511 }; 512 513 // Interface to java.lang.Thread$Constants objects 514 515 class java_lang_Thread_Constants : AllStatic { 516 private: 517 static int _static_VTHREAD_GROUP_offset; 518 static int _static_NOT_SUPPORTED_CLASSLOADER_offset; 519 520 static void compute_offsets(); 521 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 522 523 public: 524 static oop get_VTHREAD_GROUP(); 525 526 friend class JavaClasses; 527 }; 528 529 // Interface to java.lang.ThreadGroup objects 530 531 class java_lang_ThreadGroup : AllStatic { 532 private: 533 static int _parent_offset; 534 static int _name_offset; 535 static int _maxPriority_offset; 536 static int _daemon_offset; 537 538 static void compute_offsets(); 539 public: 540 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 541 542 // parent ThreadGroup 543 static oop parent(oop java_thread_group); 544 // name 545 static const char* name(oop java_thread_group); 546 // maxPriority in group 547 static ThreadPriority maxPriority(oop java_thread_group); 548 // Daemon 549 static bool is_daemon(oop java_thread_group); 550 551 // Debugging 552 friend class JavaClasses; 553 }; 554 555 556 // Interface to java.lang.VirtualThread objects 557 #define VTHREAD_INJECTED_FIELDS(macro) \ 558 macro(java_lang_VirtualThread, objectWaiter, intptr_signature, false) 559 560 class java_lang_VirtualThread : AllStatic { 561 private: 562 static int static_vthread_scope_offset; 563 static int _carrierThread_offset; 564 static int _continuation_offset; 565 static int _state_offset; 566 static int _next_offset; 567 static int _onWaitingList_offset; 568 static int _notified_offset; 569 static int _recheckInterval_offset; 570 static int _timeout_offset; 571 static int _objectWaiter_offset; 572 JFR_ONLY(static int _jfr_epoch_offset;) 573 public: 574 enum { 575 NEW = 0, 576 STARTED = 1, 577 RUNNING = 2, 578 PARKING = 3, 579 PARKED = 4, 580 PINNED = 5, 581 TIMED_PARKING = 6, 582 TIMED_PARKED = 7, 583 TIMED_PINNED = 8, 584 UNPARKED = 9, 585 YIELDING = 10, 586 YIELDED = 11, 587 BLOCKING = 12, 588 BLOCKED = 13, 589 UNBLOCKED = 14, 590 WAITING = 15, 591 WAIT = 16, // waiting in Object.wait 592 TIMED_WAITING = 17, 593 TIMED_WAIT = 18, // waiting in timed-Object.wait 594 TERMINATED = 99, 595 596 // additional state bits 597 SUSPENDED = 1 << 8, // suspended when unmounted 598 }; 599 600 static void compute_offsets(); 601 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 602 603 // Testers 604 static bool is_subclass(Klass* klass) { 605 return klass->is_subclass_of(vmClasses::VirtualThread_klass()); 606 } 607 static bool is_instance(oop obj); 608 609 static oop vthread_scope(); 610 static oop carrier_thread(oop vthread); 611 static oop continuation(oop vthread); 612 static int state(oop vthread); 613 static void set_state(oop vthread, int state); 614 static int cmpxchg_state(oop vthread, int old_state, int new_state); 615 static oop next(oop vthread); 616 static void set_next(oop vthread, oop next_vthread); 617 static bool set_onWaitingList(oop vthread, OopHandle& list_head); 618 static jlong timeout(oop vthread); 619 static void set_timeout(oop vthread, jlong value); 620 static void set_notified(oop vthread, jboolean value); 621 static bool is_preempted(oop vthread); 622 static JavaThreadStatus map_state_to_thread_status(int state); 623 624 static inline ObjectWaiter* objectWaiter(oop vthread); 625 static inline void set_objectWaiter(oop vthread, ObjectWaiter* waiter); 626 static ObjectMonitor* current_pending_monitor(oop vthread); 627 static ObjectMonitor* current_waiting_monitor(oop vthread); 628 }; 629 630 631 // Interface to java.lang.Throwable objects 632 633 class java_lang_Throwable: AllStatic { 634 friend class BacktraceBuilder; 635 friend class BacktraceIterator; 636 637 private: 638 // Trace constants 639 enum { 640 trace_methods_offset = 0, 641 trace_bcis_offset = 1, 642 trace_mirrors_offset = 2, 643 trace_names_offset = 3, 644 trace_conts_offset = 4, 645 trace_next_offset = 5, 646 trace_hidden_offset = 6, 647 trace_size = 7, 648 trace_chunk_size = 32 649 }; 650 651 static int _backtrace_offset; 652 static int _detailMessage_offset; 653 static int _stackTrace_offset; 654 static int _depth_offset; 655 static int _cause_offset; 656 static int _static_unassigned_stacktrace_offset; 657 658 // StackTrace (programmatic access, new since 1.4) 659 static void clear_stacktrace(oop throwable); 660 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 661 static void set_stacktrace(oop throwable, oop st_element_array); 662 static oop unassigned_stacktrace(); 663 664 public: 665 // Backtrace 666 static oop backtrace(oop throwable); 667 static void set_backtrace(oop throwable, oop value); 668 static int depth(oop throwable); 669 static void set_depth(oop throwable, int value); 670 // Message 671 static int get_detailMessage_offset() { CHECK_INIT(_detailMessage_offset); } 672 static oop message(oop throwable); 673 static const char* message_as_utf8(oop throwable); 674 static void set_message(oop throwable, oop value); 675 676 static oop cause(oop throwable); 677 678 static void print_stack_element(outputStream *st, Method* method, int bci); 679 680 static void compute_offsets(); 681 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 682 683 // Allocate space for backtrace (created but stack trace not filled in) 684 static void allocate_backtrace(Handle throwable, TRAPS); 685 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 686 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 687 // Fill in current stack trace, can cause GC 688 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 689 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 690 691 // Programmatic access to stack trace 692 static void get_stack_trace_elements(int depth, Handle backtrace, objArrayHandle stack_trace, TRAPS); 693 694 // For recreating class initialization error exceptions. 695 static Handle create_initialization_error(JavaThread* current, Handle throwable); 696 697 static oop create_exception_instance(Symbol* class_name, TRAPS); 698 699 // Printing 700 static void print(oop throwable, outputStream* st); 701 static void print_stack_trace(Handle throwable, outputStream* st); 702 static void java_printStackTrace(Handle throwable, TRAPS); 703 // Debugging 704 friend class JavaClasses; 705 // Gets the method and bci of the top frame (TOS). Returns false if this failed. 706 static bool get_top_method_and_bci(oop throwable, Method** method, int* bci); 707 }; 708 709 710 // Interface to java.lang.reflect.AccessibleObject objects 711 712 class java_lang_reflect_AccessibleObject: AllStatic { 713 private: 714 // Note that to reduce dependencies on the JDK we compute these 715 // offsets at run-time. 716 static int _override_offset; 717 718 static void compute_offsets(); 719 720 public: 721 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 722 723 // Accessors 724 static jboolean override(oop reflect); 725 static void set_override(oop reflect, jboolean value); 726 727 // Debugging 728 friend class JavaClasses; 729 }; 730 731 732 // Interface to java.lang.reflect.Method objects 733 734 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 735 private: 736 // Note that to reduce dependencies on the JDK we compute these 737 // offsets at run-time. 738 static int _clazz_offset; 739 static int _name_offset; 740 static int _returnType_offset; 741 static int _parameterTypes_offset; 742 static int _exceptionTypes_offset; 743 static int _slot_offset; 744 static int _modifiers_offset; 745 static int _signature_offset; 746 static int _annotations_offset; 747 static int _parameter_annotations_offset; 748 static int _annotation_default_offset; 749 750 static void compute_offsets(); 751 public: 752 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 753 754 // Allocation 755 static Handle create(TRAPS); 756 757 // Accessors 758 static oop clazz(oop reflect); 759 static void set_clazz(oop reflect, oop value); 760 761 static void set_name(oop method, oop value); 762 763 static oop return_type(oop method); 764 static void set_return_type(oop method, oop value); 765 766 static oop parameter_types(oop method); 767 static void set_parameter_types(oop method, oop value); 768 769 static int slot(oop reflect); 770 static void set_slot(oop reflect, int value); 771 772 static void set_exception_types(oop method, oop value); 773 static void set_modifiers(oop method, int value); 774 static void set_signature(oop method, oop value); 775 static void set_annotations(oop method, oop value); 776 static void set_parameter_annotations(oop method, oop value); 777 static void set_annotation_default(oop method, oop value); 778 779 // Debugging 780 friend class JavaClasses; 781 }; 782 783 784 // Interface to java.lang.reflect.Constructor objects 785 786 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 787 private: 788 // Note that to reduce dependencies on the JDK we compute these 789 // offsets at run-time. 790 static int _clazz_offset; 791 static int _parameterTypes_offset; 792 static int _exceptionTypes_offset; 793 static int _slot_offset; 794 static int _modifiers_offset; 795 static int _signature_offset; 796 static int _annotations_offset; 797 static int _parameter_annotations_offset; 798 799 static void compute_offsets(); 800 public: 801 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 802 803 // Allocation 804 static Handle create(TRAPS); 805 806 // Accessors 807 static oop clazz(oop reflect); 808 static void set_clazz(oop reflect, oop value); 809 810 static oop parameter_types(oop constructor); 811 static void set_parameter_types(oop constructor, oop value); 812 813 static int slot(oop reflect); 814 static void set_slot(oop reflect, int value); 815 816 static void set_exception_types(oop constructor, oop value); 817 static void set_modifiers(oop constructor, int value); 818 static void set_signature(oop constructor, oop value); 819 static void set_annotations(oop constructor, oop value); 820 static void set_parameter_annotations(oop method, oop value); 821 822 // Debugging 823 friend class JavaClasses; 824 }; 825 826 827 // Interface to java.lang.reflect.Field objects 828 829 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 830 private: 831 // Note that to reduce dependencies on the JDK we compute these 832 // offsets at run-time. 833 static int _clazz_offset; 834 static int _name_offset; 835 static int _type_offset; 836 static int _slot_offset; 837 static int _modifiers_offset; 838 static int _trusted_final_offset; 839 static int _signature_offset; 840 static int _annotations_offset; 841 842 static void compute_offsets(); 843 844 public: 845 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 846 847 // Allocation 848 static Handle create(TRAPS); 849 850 // Accessors 851 static oop clazz(oop reflect); 852 static void set_clazz(oop reflect, oop value); 853 854 static oop name(oop field); 855 static void set_name(oop field, oop value); 856 857 static oop type(oop field); 858 static void set_type(oop field, oop value); 859 860 static int slot(oop reflect); 861 static void set_slot(oop reflect, int value); 862 863 static int modifiers(oop field); 864 static void set_modifiers(oop field, int value); 865 866 static void set_trusted_final(oop field); 867 868 static void set_signature(oop constructor, oop value); 869 static void set_annotations(oop constructor, oop value); 870 871 // Debugging 872 friend class JavaClasses; 873 }; 874 875 class java_lang_reflect_Parameter { 876 private: 877 // Note that to reduce dependencies on the JDK we compute these 878 // offsets at run-time. 879 static int _name_offset; 880 static int _modifiers_offset; 881 static int _index_offset; 882 static int _executable_offset; 883 884 static void compute_offsets(); 885 886 public: 887 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 888 889 // Allocation 890 static Handle create(TRAPS); 891 892 // Accessors 893 static oop name(oop field); 894 static void set_name(oop field, oop value); 895 896 static int index(oop reflect); 897 static void set_index(oop reflect, int value); 898 899 static int modifiers(oop reflect); 900 static void set_modifiers(oop reflect, int value); 901 902 static oop executable(oop constructor); 903 static void set_executable(oop constructor, oop value); 904 905 friend class JavaClasses; 906 }; 907 908 #define MODULE_INJECTED_FIELDS(macro) \ 909 macro(java_lang_Module, module_entry, intptr_signature, false) 910 911 class java_lang_Module { 912 private: 913 static int _loader_offset; 914 static int _name_offset; 915 static int _module_entry_offset; 916 917 static void compute_offsets(); 918 919 public: 920 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 921 922 // Allocation 923 static Handle create(Handle loader, Handle module_name, TRAPS); 924 925 // Testers 926 static bool is_instance(oop obj); 927 928 // Accessors 929 static oop loader(oop module); 930 static void set_loader(oop module, oop value); 931 932 // CDS 933 static int module_entry_offset() { return _module_entry_offset; } 934 935 static oop name(oop module); 936 static void set_name(oop module, oop value); 937 938 static ModuleEntry* module_entry(oop module); 939 static ModuleEntry* module_entry_raw(oop module); 940 static void set_module_entry(oop module, ModuleEntry* module_entry); 941 942 friend class JavaClasses; 943 }; 944 945 #define CONSTANTPOOL_INJECTED_FIELDS(macro) \ 946 macro(reflect_ConstantPool, vmholder, object_signature, false) 947 948 // Interface to jdk.internal.reflect.ConstantPool objects 949 class reflect_ConstantPool { 950 private: 951 // Note that to reduce dependencies on the JDK we compute these 952 // offsets at run-time. This field is the oop offset for the 953 // actual constant pool, previously called constantPoolOop. 954 static int _vmholder_offset; 955 956 static void compute_offsets(); 957 958 public: 959 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 960 961 // Allocation 962 static Handle create(TRAPS); 963 964 // Accessors 965 static void set_cp(oop reflect, ConstantPool* value); 966 967 static ConstantPool* get_cp(oop reflect); 968 969 // Debugging 970 friend class JavaClasses; 971 }; 972 973 974 // Interface to java.lang primitive type boxing objects: 975 // - java.lang.Boolean 976 // - java.lang.Character 977 // - java.lang.Float 978 // - java.lang.Double 979 // - java.lang.Byte 980 // - java.lang.Short 981 // - java.lang.Integer 982 // - java.lang.Long 983 984 // This could be separated out into 8 individual classes. 985 986 class java_lang_boxing_object: AllStatic { 987 private: 988 static int _value_offset; 989 static int _long_value_offset; 990 991 static void compute_offsets(); 992 static oop initialize_and_allocate(BasicType type, TRAPS); 993 public: 994 // Allocation. Returns a boxed value, or null for invalid type. 995 static oop create(BasicType type, jvalue* value, TRAPS); 996 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 997 static BasicType get_value(oop box, jvalue* value); 998 static BasicType set_value(oop box, jvalue* value); 999 static BasicType basic_type(oop box); 1000 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 1001 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 1002 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 1003 static void print(BasicType type, jvalue* value, outputStream* st); 1004 1005 static int value_offset(BasicType type) { 1006 return is_double_word_type(type) ? _long_value_offset : _value_offset; 1007 } 1008 1009 static void serialize_offsets(SerializeClosure* f); 1010 1011 // Debugging 1012 friend class JavaClasses; 1013 }; 1014 1015 1016 1017 // Interface to java.lang.ref.Reference objects 1018 1019 class java_lang_ref_Reference: AllStatic { 1020 static int _referent_offset; 1021 static int _queue_offset; 1022 static int _next_offset; 1023 static int _discovered_offset; 1024 1025 static bool _offsets_initialized; 1026 1027 public: 1028 // Accessors 1029 static inline oop weak_referent_no_keepalive(oop ref); 1030 static inline oop weak_referent(oop ref); 1031 static inline oop phantom_referent_no_keepalive(oop ref); 1032 static inline oop unknown_referent_no_keepalive(oop ref); 1033 static inline void clear_referent(oop ref); 1034 static inline void clear_referent_raw(oop ref); 1035 static inline HeapWord* referent_addr_raw(oop ref); 1036 static inline oop next(oop ref); 1037 static inline void set_next(oop ref, oop value); 1038 static inline void set_next_raw(oop ref, oop value); 1039 static inline HeapWord* next_addr_raw(oop ref); 1040 static inline oop discovered(oop ref); 1041 static inline void set_discovered(oop ref, oop value); 1042 static inline void set_discovered_raw(oop ref, oop value); 1043 static inline HeapWord* discovered_addr_raw(oop ref); 1044 static bool is_referent_field(oop obj, ptrdiff_t offset); 1045 static inline bool is_final(oop ref); 1046 static inline bool is_phantom(oop ref); 1047 static inline bool is_weak(oop ref); 1048 static inline bool is_soft(oop ref); 1049 1050 static int referent_offset() { CHECK_INIT(_referent_offset); } 1051 static int queue_offset() { CHECK_INIT(_queue_offset); } 1052 static int next_offset() { CHECK_INIT(_next_offset); } 1053 static int discovered_offset() { CHECK_INIT(_discovered_offset); } 1054 1055 static void compute_offsets(); 1056 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1057 }; 1058 1059 1060 // Interface to java.lang.ref.SoftReference objects 1061 1062 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 1063 static int _timestamp_offset; 1064 static int _static_clock_offset; 1065 1066 public: 1067 // Accessors 1068 static jlong timestamp(oop ref); 1069 1070 // Accessors for statics 1071 static jlong clock(); 1072 static void set_clock(jlong value); 1073 1074 static void compute_offsets(); 1075 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1076 }; 1077 1078 // Interface to java.lang.invoke.MethodHandle objects 1079 1080 class java_lang_invoke_MethodHandle: AllStatic { 1081 friend class JavaClasses; 1082 1083 private: 1084 static int _type_offset; // the MethodType of this MH 1085 static int _form_offset; // the LambdaForm of this MH 1086 1087 static void compute_offsets(); 1088 1089 public: 1090 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1091 1092 // Accessors 1093 static oop type(oop mh); 1094 static void set_type(oop mh, oop mtype); 1095 1096 static oop form(oop mh); 1097 static void set_form(oop mh, oop lform); 1098 1099 // Testers 1100 static bool is_subclass(Klass* klass) { 1101 return klass->is_subclass_of(vmClasses::MethodHandle_klass()); 1102 } 1103 static bool is_instance(oop obj); 1104 1105 // Accessors for code generation: 1106 static int type_offset() { CHECK_INIT(_type_offset); } 1107 static int form_offset() { CHECK_INIT(_form_offset); } 1108 }; 1109 1110 // Interface to java.lang.invoke.DirectMethodHandle objects 1111 1112 class java_lang_invoke_DirectMethodHandle: AllStatic { 1113 friend class JavaClasses; 1114 1115 private: 1116 static int _member_offset; // the MemberName of this DMH 1117 1118 static void compute_offsets(); 1119 1120 public: 1121 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1122 1123 // Accessors 1124 static oop member(oop mh); 1125 1126 // Testers 1127 static bool is_subclass(Klass* klass) { 1128 return klass->is_subclass_of(vmClasses::DirectMethodHandle_klass()); 1129 } 1130 static bool is_instance(oop obj); 1131 1132 // Accessors for code generation: 1133 static int member_offset() { CHECK_INIT(_member_offset); } 1134 }; 1135 1136 // Interface to java.lang.invoke.LambdaForm objects 1137 // (These are a private interface for managing adapter code generation.) 1138 1139 class java_lang_invoke_LambdaForm: AllStatic { 1140 friend class JavaClasses; 1141 1142 private: 1143 static int _vmentry_offset; // type is MemberName 1144 1145 static void compute_offsets(); 1146 1147 public: 1148 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1149 1150 // Accessors 1151 static oop vmentry(oop lform); 1152 1153 // Testers 1154 static bool is_subclass(Klass* klass) { 1155 return vmClasses::LambdaForm_klass() != nullptr && 1156 klass->is_subclass_of(vmClasses::LambdaForm_klass()); 1157 } 1158 static bool is_instance(oop obj); 1159 1160 // Accessors for code generation: 1161 static int vmentry_offset() { CHECK_INIT(_vmentry_offset); } 1162 }; 1163 1164 // Interface to java.lang.invoke.NativeEntryPoint objects 1165 // (These are a private interface for managing adapter code generation.) 1166 1167 class jdk_internal_foreign_abi_NativeEntryPoint: AllStatic { 1168 friend class JavaClasses; 1169 1170 private: 1171 static int _method_type_offset; 1172 static int _downcall_stub_address_offset; 1173 1174 static void compute_offsets(); 1175 1176 public: 1177 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1178 1179 // Accessors 1180 static oop method_type(oop entry); 1181 static jlong downcall_stub_address(oop entry); 1182 1183 // Testers 1184 static bool is_subclass(Klass* klass) { 1185 return vmClasses::NativeEntryPoint_klass() != nullptr && 1186 klass->is_subclass_of(vmClasses::NativeEntryPoint_klass()); 1187 } 1188 static bool is_instance(oop obj); 1189 1190 // Accessors for code generation: 1191 static int method_type_offset_in_bytes() { return _method_type_offset; } 1192 static int downcall_stub_address_offset_in_bytes() { return _downcall_stub_address_offset; } 1193 }; 1194 1195 class jdk_internal_foreign_abi_ABIDescriptor: AllStatic { 1196 friend class JavaClasses; 1197 1198 private: 1199 static int _inputStorage_offset; 1200 static int _outputStorage_offset; 1201 static int _volatileStorage_offset; 1202 static int _stackAlignment_offset; 1203 static int _shadowSpace_offset; 1204 static int _scratch1_offset; 1205 static int _scratch2_offset; 1206 1207 static void compute_offsets(); 1208 1209 public: 1210 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1211 1212 // Accessors 1213 static objArrayOop inputStorage(oop entry); 1214 static objArrayOop outputStorage(oop entry); 1215 static objArrayOop volatileStorage(oop entry); 1216 static jint stackAlignment(oop entry); 1217 static jint shadowSpace(oop entry); 1218 static oop scratch1(oop entry); 1219 static oop scratch2(oop entry); 1220 1221 // Testers 1222 static bool is_subclass(Klass* klass) { 1223 return vmClasses::ABIDescriptor_klass() != nullptr && 1224 klass->is_subclass_of(vmClasses::ABIDescriptor_klass()); 1225 } 1226 static bool is_instance(oop obj); 1227 }; 1228 1229 class jdk_internal_foreign_abi_VMStorage: AllStatic { 1230 friend class JavaClasses; 1231 1232 private: 1233 static int _type_offset; 1234 static int _indexOrOffset_offset; 1235 static int _segmentMaskOrSize_offset; 1236 static int _debugName_offset; 1237 1238 static void compute_offsets(); 1239 1240 public: 1241 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1242 1243 // Accessors 1244 static jbyte type(oop entry); 1245 static jint index_or_offset(oop entry); 1246 static jshort segment_mask_or_size(oop entry); 1247 static oop debugName(oop entry); 1248 1249 // Testers 1250 static bool is_subclass(Klass* klass) { 1251 return vmClasses::VMStorage_klass() != nullptr && 1252 klass->is_subclass_of(vmClasses::VMStorage_klass()); 1253 } 1254 static bool is_instance(oop obj); 1255 }; 1256 1257 class jdk_internal_foreign_abi_CallConv: AllStatic { 1258 friend class JavaClasses; 1259 1260 private: 1261 static int _argRegs_offset; 1262 static int _retRegs_offset; 1263 1264 static void compute_offsets(); 1265 1266 public: 1267 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1268 1269 // Accessors 1270 static objArrayOop argRegs(oop entry); 1271 static objArrayOop retRegs(oop entry); 1272 1273 // Testers 1274 static bool is_subclass(Klass* klass) { 1275 return vmClasses::CallConv_klass() != nullptr && 1276 klass->is_subclass_of(vmClasses::CallConv_klass()); 1277 } 1278 static bool is_instance(oop obj); 1279 }; 1280 1281 // Interface to java.lang.invoke.MemberName objects 1282 // (These are a private interface for Java code to query the class hierarchy.) 1283 1284 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1285 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false) 1286 1287 class java_lang_invoke_ResolvedMethodName : AllStatic { 1288 friend class JavaClasses; 1289 1290 static int _vmtarget_offset; 1291 static int _vmholder_offset; 1292 1293 static void compute_offsets(); 1294 public: 1295 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1296 1297 static int vmtarget_offset() { CHECK_INIT(_vmtarget_offset); } 1298 1299 static Method* vmtarget(oop resolved_method); 1300 static void set_vmtarget(oop resolved_method, Method* method); 1301 1302 static void set_vmholder(oop resolved_method, oop holder); 1303 1304 // find or create resolved member name 1305 static oop find_resolved_method(const methodHandle& m, TRAPS); 1306 1307 static bool is_instance(oop resolved_method); 1308 }; 1309 1310 1311 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1312 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) 1313 1314 1315 class java_lang_invoke_MemberName: AllStatic { 1316 friend class JavaClasses; 1317 1318 private: 1319 // From java.lang.invoke.MemberName: 1320 // private Class<?> clazz; // class in which the method is defined 1321 // private String name; // may be null if not yet materialized 1322 // private Object type; // may be null if not yet materialized 1323 // private int flags; // modifier bits; see reflect.Modifier 1324 // private ResolvedMethodName method; // holds VM-specific target value 1325 // private intptr_t vmindex; // member index within class or interface 1326 static int _clazz_offset; 1327 static int _name_offset; 1328 static int _type_offset; 1329 static int _flags_offset; 1330 static int _method_offset; 1331 static int _vmindex_offset; 1332 1333 static void compute_offsets(); 1334 1335 public: 1336 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1337 // Accessors 1338 static oop clazz(oop mname); 1339 static void set_clazz(oop mname, oop clazz); 1340 1341 static oop type(oop mname); 1342 static void set_type(oop mname, oop type); 1343 1344 static oop name(oop mname); 1345 static void set_name(oop mname, oop name); 1346 1347 static int flags(oop mname); 1348 static void set_flags(oop mname, int flags); 1349 1350 // Link through ResolvedMethodName field to get Method* 1351 static Method* vmtarget(oop mname); 1352 static void set_method(oop mname, oop method); 1353 1354 static intptr_t vmindex(oop mname); 1355 static void set_vmindex(oop mname, intptr_t index); 1356 1357 // Testers 1358 static bool is_subclass(Klass* klass) { 1359 return klass->is_subclass_of(vmClasses::MemberName_klass()); 1360 } 1361 static bool is_instance(oop obj); 1362 1363 static bool is_method(oop obj); 1364 1365 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1366 enum { 1367 MN_IS_METHOD = 0x00010000, // method (not constructor) 1368 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1369 MN_IS_FIELD = 0x00040000, // field 1370 MN_IS_TYPE = 0x00080000, // nested type 1371 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1372 MN_TRUSTED_FINAL = 0x00200000, // trusted final field 1373 MN_HIDDEN_MEMBER = 0x00400000, // @Hidden annotation detected 1374 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1375 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1376 MN_NESTMATE_CLASS = 0x00000001, 1377 MN_HIDDEN_CLASS = 0x00000002, 1378 MN_STRONG_LOADER_LINK = 0x00000004, 1379 MN_ACCESS_VM_ANNOTATIONS = 0x00000008, 1380 // Lookup modes 1381 MN_MODULE_MODE = 0x00000010, 1382 MN_UNCONDITIONAL_MODE = 0x00000020, 1383 MN_TRUSTED_MODE = -1 1384 }; 1385 1386 // Accessors for code generation: 1387 static int clazz_offset() { CHECK_INIT(_clazz_offset); } 1388 static int type_offset() { CHECK_INIT(_type_offset); } 1389 static int flags_offset() { CHECK_INIT(_flags_offset); } 1390 static int method_offset() { CHECK_INIT(_method_offset); } 1391 static int vmindex_offset() { CHECK_INIT(_vmindex_offset); } 1392 }; 1393 1394 1395 // Interface to java.lang.invoke.MethodType objects 1396 1397 class java_lang_invoke_MethodType: AllStatic { 1398 friend class JavaClasses; 1399 1400 private: 1401 static int _rtype_offset; 1402 static int _ptypes_offset; 1403 1404 static void compute_offsets(); 1405 1406 public: 1407 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1408 // Accessors 1409 static oop rtype(oop mt); 1410 static objArrayOop ptypes(oop mt); 1411 1412 static oop ptype(oop mt, int index); 1413 static int ptype_count(oop mt); 1414 1415 static int ptype_slot_count(oop mt); // extra counts for long/double 1416 static int rtype_slot_count(oop mt); // extra counts for long/double 1417 1418 static Symbol* as_signature(oop mt, bool intern_if_not_found); 1419 static void print_signature(oop mt, outputStream* st); 1420 1421 static bool is_instance(oop obj); 1422 1423 static bool equals(oop mt1, oop mt2); 1424 1425 // Accessors for code generation: 1426 static int rtype_offset() { CHECK_INIT(_rtype_offset); } 1427 static int ptypes_offset() { CHECK_INIT(_ptypes_offset); } 1428 }; 1429 1430 1431 // Interface to java.lang.invoke.CallSite objects 1432 #define CALLSITE_INJECTED_FIELDS(macro) \ 1433 macro(java_lang_invoke_CallSite, vmdependencies, intptr_signature, false) \ 1434 macro(java_lang_invoke_CallSite, last_cleanup, long_signature, false) 1435 1436 class java_lang_invoke_CallSite: AllStatic { 1437 friend class JavaClasses; 1438 1439 private: 1440 static int _target_offset; 1441 static int _vmdependencies_offset; 1442 static int _last_cleanup_offset; 1443 1444 static void compute_offsets(); 1445 1446 public: 1447 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1448 // Accessors 1449 static oop target( oop site); 1450 static void set_target( oop site, oop target); 1451 static void set_target_volatile( oop site, oop target); 1452 1453 static DependencyContext vmdependencies(oop call_site); 1454 1455 // Testers 1456 static bool is_subclass(Klass* klass) { 1457 return klass->is_subclass_of(vmClasses::CallSite_klass()); 1458 } 1459 static bool is_instance(oop obj); 1460 1461 // Accessors for code generation: 1462 static int target_offset() { CHECK_INIT(_target_offset); } 1463 }; 1464 1465 // Interface to java.lang.invoke.ConstantCallSite objects 1466 1467 class java_lang_invoke_ConstantCallSite: AllStatic { 1468 friend class JavaClasses; 1469 1470 private: 1471 static int _is_frozen_offset; 1472 1473 static void compute_offsets(); 1474 1475 public: 1476 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1477 // Accessors 1478 static jboolean is_frozen(oop site); 1479 1480 // Testers 1481 static bool is_subclass(Klass* klass) { 1482 return klass->is_subclass_of(vmClasses::ConstantCallSite_klass()); 1483 } 1484 static bool is_instance(oop obj); 1485 }; 1486 1487 // Interface to java.lang.ClassLoader objects 1488 1489 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1490 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1491 1492 class java_lang_ClassLoader : AllStatic { 1493 private: 1494 static int _loader_data_offset; 1495 static int _parent_offset; 1496 static int _parallelCapable_offset; 1497 static int _name_offset; 1498 static int _nameAndId_offset; 1499 static int _unnamedModule_offset; 1500 1501 static void compute_offsets(); 1502 1503 public: 1504 // Support for CDS 1505 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1506 static int loader_data_offset() { return _loader_data_offset; } 1507 1508 static ClassLoaderData* loader_data_acquire(oop loader); 1509 static ClassLoaderData* loader_data(oop loader); 1510 static void release_set_loader_data(oop loader, ClassLoaderData* new_data); 1511 1512 static oop parent(oop loader); 1513 static oop parent_no_keepalive(oop loader); 1514 static oop name(oop loader); 1515 static oop nameAndId(oop loader); 1516 static bool isAncestor(oop loader, oop cl); 1517 1518 // Support for parallelCapable field 1519 static bool parallelCapable(oop the_class_mirror); 1520 1521 static bool is_trusted_loader(oop loader); 1522 1523 // Testers 1524 static bool is_subclass(Klass* klass) { 1525 return klass->is_subclass_of(vmClasses::ClassLoader_klass()); 1526 } 1527 static bool is_instance(oop obj); 1528 1529 static oop unnamedModule(oop loader); 1530 1531 // Debugging 1532 friend class JavaClasses; 1533 }; 1534 1535 1536 // Interface to java.lang.System objects 1537 1538 class java_lang_System : AllStatic { 1539 private: 1540 static int _static_in_offset; 1541 static int _static_out_offset; 1542 static int _static_err_offset; 1543 1544 public: 1545 static int in_offset() { CHECK_INIT(_static_in_offset); } 1546 static int out_offset() { CHECK_INIT(_static_out_offset); } 1547 static int err_offset() { CHECK_INIT(_static_err_offset); } 1548 1549 static void compute_offsets(); 1550 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1551 1552 // Debugging 1553 friend class JavaClasses; 1554 }; 1555 1556 1557 // Interface to java.lang.StackTraceElement objects 1558 1559 class java_lang_StackTraceElement: AllStatic { 1560 private: 1561 static int _declaringClassObject_offset; 1562 static int _classLoaderName_offset; 1563 static int _moduleName_offset; 1564 static int _moduleVersion_offset; 1565 static int _declaringClass_offset; 1566 static int _methodName_offset; 1567 static int _fileName_offset; 1568 static int _lineNumber_offset; 1569 1570 // Setters 1571 static void set_classLoaderName(oop element, oop value); 1572 static void set_moduleName(oop element, oop value); 1573 static void set_moduleVersion(oop element, oop value); 1574 static void set_declaringClass(oop element, oop value); 1575 static void set_methodName(oop element, oop value); 1576 static void set_fileName(oop element, oop value); 1577 static void set_lineNumber(oop element, int value); 1578 static void set_declaringClassObject(oop element, oop value); 1579 1580 static void decode_file_and_line(Handle java_mirror, InstanceKlass* holder, int version, 1581 const methodHandle& method, int bci, 1582 Symbol*& source, oop& source_file, int& line_number, TRAPS); 1583 1584 public: 1585 // Create an instance of StackTraceElement 1586 static oop create(const methodHandle& method, int bci, TRAPS); 1587 1588 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1589 int version, int bci, Symbol* name, TRAPS); 1590 1591 static void compute_offsets(); 1592 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1593 1594 #if INCLUDE_JVMCI 1595 static void decode(const methodHandle& method, int bci, Symbol*& fileName, int& lineNumber, TRAPS); 1596 #endif 1597 1598 // Debugging 1599 friend class JavaClasses; 1600 }; 1601 1602 1603 class Backtrace: AllStatic { 1604 public: 1605 // Helper backtrace functions to store bci|version together. 1606 static int merge_bci_and_version(int bci, int version); 1607 static int merge_mid_and_cpref(int mid, int cpref); 1608 static int bci_at(unsigned int merged); 1609 static int version_at(unsigned int merged); 1610 static int mid_at(unsigned int merged); 1611 static int cpref_at(unsigned int merged); 1612 static int get_line_number(Method* method, int bci); 1613 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1614 1615 // Debugging 1616 friend class JavaClasses; 1617 }; 1618 1619 class java_lang_ClassFrameInfo: AllStatic { 1620 private: 1621 static int _classOrMemberName_offset; 1622 static int _flags_offset; 1623 1624 public: 1625 static oop classOrMemberName(oop info); 1626 static int flags(oop info); 1627 1628 // Setters 1629 static void init_class(Handle stackFrame, const methodHandle& m); 1630 static void init_method(Handle stackFrame, const methodHandle& m, TRAPS); 1631 1632 static void compute_offsets(); 1633 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1634 1635 // Debugging 1636 friend class JavaClasses; 1637 }; 1638 1639 // Interface to java.lang.StackFrameInfo objects 1640 1641 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1642 macro(java_lang_StackFrameInfo, version, short_signature, false) 1643 1644 class java_lang_StackFrameInfo: AllStatic { 1645 private: 1646 static int _type_offset; 1647 static int _name_offset; 1648 static int _bci_offset; 1649 static int _version_offset; 1650 static int _contScope_offset; 1651 1652 public: 1653 // Getters 1654 static oop name(oop info); 1655 static oop type(oop info); 1656 static Method* get_method(oop info); 1657 1658 // Setters 1659 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS); 1660 static void set_name(oop info, oop value); 1661 static void set_type(oop info, oop value); 1662 static void set_bci(oop info, int value); 1663 1664 static void set_version(oop info, short value); 1665 static void set_contScope(oop info, oop value); 1666 1667 static void compute_offsets(); 1668 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1669 1670 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1671 1672 // Debugging 1673 friend class JavaClasses; 1674 }; 1675 1676 class java_lang_LiveStackFrameInfo: AllStatic { 1677 private: 1678 static int _monitors_offset; 1679 static int _locals_offset; 1680 static int _operands_offset; 1681 static int _mode_offset; 1682 1683 public: 1684 static void set_monitors(oop info, oop value); 1685 static void set_locals(oop info, oop value); 1686 static void set_operands(oop info, oop value); 1687 static void set_mode(oop info, int value); 1688 1689 static void compute_offsets(); 1690 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1691 1692 // Debugging 1693 friend class JavaClasses; 1694 }; 1695 1696 // Interface to java.lang.reflect.RecordComponent objects 1697 1698 class java_lang_reflect_RecordComponent: AllStatic { 1699 private: 1700 static int _clazz_offset; 1701 static int _name_offset; 1702 static int _type_offset; 1703 static int _accessor_offset; 1704 static int _signature_offset; 1705 static int _annotations_offset; 1706 static int _typeAnnotations_offset; 1707 1708 // Setters 1709 static void set_clazz(oop element, oop value); 1710 static void set_name(oop element, oop value); 1711 static void set_type(oop element, oop value); 1712 static void set_accessor(oop element, oop value); 1713 static void set_signature(oop element, oop value); 1714 static void set_annotations(oop element, oop value); 1715 static void set_typeAnnotations(oop element, oop value); 1716 1717 public: 1718 // Create an instance of RecordComponent 1719 static oop create(InstanceKlass* holder, RecordComponent* component, TRAPS); 1720 1721 static void compute_offsets(); 1722 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1723 1724 // Debugging 1725 friend class JavaClasses; 1726 }; 1727 1728 1729 // Interface to java.lang.AssertionStatusDirectives objects 1730 1731 class java_lang_AssertionStatusDirectives: AllStatic { 1732 private: 1733 static int _classes_offset; 1734 static int _classEnabled_offset; 1735 static int _packages_offset; 1736 static int _packageEnabled_offset; 1737 static int _deflt_offset; 1738 1739 public: 1740 // Setters 1741 static void set_classes(oop obj, oop val); 1742 static void set_classEnabled(oop obj, oop val); 1743 static void set_packages(oop obj, oop val); 1744 static void set_packageEnabled(oop obj, oop val); 1745 static void set_deflt(oop obj, bool val); 1746 1747 static void compute_offsets(); 1748 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1749 1750 // Debugging 1751 friend class JavaClasses; 1752 }; 1753 1754 1755 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1756 private: 1757 static int _owner_offset; 1758 public: 1759 static void compute_offsets(); 1760 static oop get_owner_threadObj(oop obj); 1761 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1762 }; 1763 1764 // Interface to jdk.internal.misc.UnsafeConsants 1765 1766 class jdk_internal_misc_UnsafeConstants : AllStatic { 1767 public: 1768 static void set_unsafe_constants(); 1769 static void compute_offsets() { } 1770 static void serialize_offsets(SerializeClosure* f) { } 1771 }; 1772 1773 // Interface to jdk.internal.vm.vector.VectorSupport.VectorPayload objects 1774 1775 class vector_VectorPayload : AllStatic { 1776 private: 1777 static int _payload_offset; 1778 public: 1779 static void set_payload(oop o, oop val); 1780 1781 static void compute_offsets(); 1782 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1783 1784 // Testers 1785 static bool is_subclass(Klass* klass) { 1786 return klass->is_subclass_of(vmClasses::vector_VectorPayload_klass()); 1787 } 1788 static bool is_instance(oop obj); 1789 }; 1790 1791 class java_lang_Integer : AllStatic { 1792 public: 1793 static jint value(oop obj); 1794 }; 1795 1796 class java_lang_Long : AllStatic { 1797 public: 1798 static jlong value(oop obj); 1799 }; 1800 1801 class java_lang_Character : AllStatic { 1802 public: 1803 static jchar value(oop obj); 1804 }; 1805 1806 class java_lang_Short : AllStatic { 1807 public: 1808 static jshort value(oop obj); 1809 }; 1810 1811 class java_lang_Byte : AllStatic { 1812 public: 1813 static jbyte value(oop obj); 1814 }; 1815 1816 class java_lang_Boolean : AllStatic { 1817 private: 1818 static int _static_TRUE_offset; 1819 static int _static_FALSE_offset; 1820 public: 1821 static Symbol* symbol(); 1822 static void compute_offsets(InstanceKlass* k); 1823 static oop get_TRUE(InstanceKlass *k); 1824 static oop get_FALSE(InstanceKlass *k); 1825 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1826 static jboolean value(oop obj); 1827 }; 1828 1829 class java_lang_Integer_IntegerCache : AllStatic { 1830 private: 1831 static int _static_cache_offset; 1832 public: 1833 static Symbol* symbol(); 1834 static void compute_offsets(InstanceKlass* k); 1835 static objArrayOop cache(InstanceKlass *k); 1836 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1837 }; 1838 1839 class java_lang_Long_LongCache : AllStatic { 1840 private: 1841 static int _static_cache_offset; 1842 public: 1843 static Symbol* symbol(); 1844 static void compute_offsets(InstanceKlass* k); 1845 static objArrayOop cache(InstanceKlass *k); 1846 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1847 }; 1848 1849 class java_lang_Character_CharacterCache : AllStatic { 1850 private: 1851 static int _static_cache_offset; 1852 public: 1853 static Symbol* symbol(); 1854 static void compute_offsets(InstanceKlass* k); 1855 static objArrayOop cache(InstanceKlass *k); 1856 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1857 }; 1858 1859 class java_lang_Short_ShortCache : AllStatic { 1860 private: 1861 static int _static_cache_offset; 1862 public: 1863 static Symbol* symbol(); 1864 static void compute_offsets(InstanceKlass* k); 1865 static objArrayOop cache(InstanceKlass *k); 1866 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1867 }; 1868 1869 class java_lang_Byte_ByteCache : AllStatic { 1870 private: 1871 static int _static_cache_offset; 1872 public: 1873 static Symbol* symbol(); 1874 static void compute_offsets(InstanceKlass* k); 1875 static objArrayOop cache(InstanceKlass *k); 1876 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1877 }; 1878 1879 1880 // Interface to java.lang.InternalError objects 1881 1882 #define INTERNALERROR_INJECTED_FIELDS(macro) \ 1883 macro(java_lang_InternalError, during_unsafe_access, bool_signature, false) 1884 1885 class java_lang_InternalError : AllStatic { 1886 private: 1887 static int _during_unsafe_access_offset; 1888 public: 1889 static jboolean during_unsafe_access(oop internal_error); 1890 static void set_during_unsafe_access(oop internal_error); 1891 static void compute_offsets(); 1892 static void serialize_offsets(SerializeClosure* f) NOT_CDS_RETURN; 1893 }; 1894 1895 // Use to declare fields that need to be injected into Java classes 1896 // for the JVM to use. The name_index and signature_index are 1897 // declared in vmSymbols. The may_be_java flag is used to declare 1898 // fields that might already exist in Java but should be injected if 1899 // they don't. Otherwise the field is unconditionally injected and 1900 // the JVM uses the injected one. This is to ensure that name 1901 // collisions don't occur. In general may_be_java should be false 1902 // unless there's a good reason. 1903 1904 class InjectedField { 1905 public: 1906 const vmClassID klass_id; 1907 const vmSymbolID name_index; 1908 const vmSymbolID signature_index; 1909 const bool may_be_java; 1910 1911 1912 InstanceKlass* klass() const { return vmClasses::klass_at(klass_id); } 1913 Symbol* name() const { return lookup_symbol(name_index); } 1914 Symbol* signature() const { return lookup_symbol(signature_index); } 1915 1916 int compute_offset(); 1917 1918 // Find the Symbol for this index 1919 static Symbol* lookup_symbol(vmSymbolID symbol_index) { 1920 return Symbol::vm_symbol_at(symbol_index); 1921 } 1922 }; 1923 1924 1925 // Interface to hard-coded offset checking 1926 1927 enum class InjectedFieldID : int; 1928 1929 class JavaClasses : AllStatic { 1930 private: 1931 1932 static InjectedField _injected_fields[]; 1933 1934 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1935 public: 1936 1937 static int compute_injected_offset(InjectedFieldID id); 1938 1939 static void compute_offsets(); 1940 static void check_offsets() PRODUCT_RETURN; 1941 static void serialize_offsets(SerializeClosure* soc) NOT_CDS_RETURN; 1942 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1943 static bool is_supported_for_archiving(oop obj) NOT_CDS_JAVA_HEAP_RETURN_(false); 1944 1945 static void compute_offset(int &dest_offset, 1946 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 1947 bool is_static = false); 1948 static void compute_offset(int& dest_offset, InstanceKlass* ik, 1949 const char* name_string, Symbol* signature_symbol, 1950 bool is_static = false); 1951 }; 1952 1953 #undef CHECK_INIT 1954 1955 #endif // SHARE_CLASSFILE_JAVACLASSES_HPP