1 /* 2 * Copyright (c) 1997, 2018, 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 void set_compact_strings(bool value); 85 86 static int value_offset_in_bytes() { 87 assert(initialized && (value_offset > 0), "Must be initialized"); 88 return value_offset; 89 } 90 static int hash_offset_in_bytes() { 91 assert(initialized && (hash_offset > 0), "Must be initialized"); 92 return hash_offset; 93 } 94 static int coder_offset_in_bytes() { 95 assert(initialized && (coder_offset > 0), "Must be initialized"); 96 return coder_offset; 97 } 98 99 static inline void set_value_raw(oop string, typeArrayOop buffer); 100 static inline void set_value(oop string, typeArrayOop buffer); 101 static inline void set_hash(oop string, unsigned int hash); 102 103 // Accessors 104 static inline typeArrayOop value(oop java_string); 105 static inline typeArrayOop value_no_keepalive(oop java_string); 106 static inline unsigned int hash(oop java_string); 107 static inline bool is_latin1(oop java_string); 108 static inline int length(oop java_string); 109 static int utf8_length(oop java_string); 110 111 // String converters 112 static char* as_utf8_string(oop java_string); 113 static char* as_utf8_string(oop java_string, char* buf, int buflen); 114 static char* as_utf8_string(oop java_string, int start, int len); 115 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 116 static char* as_platform_dependent_str(Handle java_string, TRAPS); 117 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 118 // produce an ascii string with all other values quoted using \u#### 119 static char* as_quoted_ascii(oop java_string); 120 121 // Compute the hash value for a java.lang.String object which would 122 // contain the characters passed in. 123 // 124 // As the hash value used by the String object itself, in 125 // String.hashCode(). This value is normally calculated in Java code 126 // in the String.hashCode method(), but is precomputed for String 127 // objects in the shared archive file. 128 // hash P(31) from Kernighan & Ritchie 129 // 130 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 131 static unsigned int hash_code(const jchar* s, int len) { 132 unsigned int h = 0; 133 while (len-- > 0) { 134 h = 31*h + (unsigned int) *s; 135 s++; 136 } 137 return h; 138 } 139 140 static unsigned int hash_code(const jbyte* s, int len) { 141 unsigned int h = 0; 142 while (len-- > 0) { 143 h = 31*h + (((unsigned int) *s) & 0xFF); 144 s++; 145 } 146 return h; 147 } 148 149 static unsigned int hash_code(oop java_string); 150 151 static bool equals(oop java_string, jchar* chars, int len); 152 static bool equals(oop str1, oop str2); 153 154 // Conversion between '.' and '/' formats 155 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 156 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 157 158 // Conversion 159 static Symbol* as_symbol(oop java_string, TRAPS); 160 static Symbol* as_symbol_or_null(oop java_string); 161 162 // Testers 163 static bool is_instance(oop obj); 164 static inline bool is_instance_inlined(oop obj); 165 166 // Debugging 167 static void print(oop java_string, outputStream* st); 168 friend class JavaClasses; 169 friend class StringTable; 170 }; 171 172 173 // Interface to java.lang.Class objects 174 175 #define CLASS_INJECTED_FIELDS(macro) \ 176 macro(java_lang_Class, klass, intptr_signature, false) \ 177 macro(java_lang_Class, array_klass, intptr_signature, false) \ 178 macro(java_lang_Class, oop_size, int_signature, false) \ 179 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 180 macro(java_lang_Class, protection_domain, object_signature, false) \ 181 macro(java_lang_Class, signers, object_signature, false) 182 183 class java_lang_Class : AllStatic { 184 friend class VMStructs; 185 friend class JVMCIVMStructs; 186 187 private: 188 // The fake offsets are added by the class loader when java.lang.Class is loaded 189 190 static int _klass_offset; 191 static int _array_klass_offset; 192 193 static int _oop_size_offset; 194 static int _static_oop_field_count_offset; 195 196 static int _protection_domain_offset; 197 static int _init_lock_offset; 198 static int _signers_offset; 199 static int _class_loader_offset; 200 static int _module_offset; 201 static int _component_mirror_offset; 202 203 static bool offsets_computed; 204 static int classRedefinedCount_offset; 205 206 static GrowableArray<Klass*>* _fixup_mirror_list; 207 static GrowableArray<Klass*>* _fixup_module_field_list; 208 209 static void set_init_lock(oop java_class, oop init_lock); 210 static void set_protection_domain(oop java_class, oop protection_domain); 211 static void set_class_loader(oop java_class, oop class_loader); 212 static void set_component_mirror(oop java_class, oop comp_mirror); 213 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS); 214 static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS); 215 public: 216 static void allocate_fixup_lists(); 217 static void compute_offsets(); 218 219 // Instance creation 220 static void create_mirror(Klass* k, Handle class_loader, Handle module, 221 Handle protection_domain, TRAPS); 222 static void fixup_mirror(Klass* k, TRAPS); 223 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 224 225 static void fixup_module_field(Klass* k, Handle module); 226 227 // Conversion 228 static Klass* as_Klass(oop java_class); 229 static void set_klass(oop java_class, Klass* klass); 230 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 231 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 232 static void print_signature(oop java_class, outputStream *st); 233 static const char* as_external_name(oop java_class); 234 // Testing 235 static bool is_instance(oop obj); 236 237 static bool is_primitive(oop java_class); 238 static BasicType primitive_type(oop java_class); 239 static oop primitive_mirror(BasicType t); 240 // JVM_NewArray support 241 static Klass* array_klass_acquire(oop java_class); 242 static void release_set_array_klass(oop java_class, Klass* klass); 243 // compiler support for class operations 244 static int klass_offset_in_bytes() { return _klass_offset; } 245 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 246 // Support for classRedefinedCount field 247 static int classRedefinedCount(oop the_class_mirror); 248 static void set_classRedefinedCount(oop the_class_mirror, int value); 249 250 // Support for embedded per-class oops 251 static oop protection_domain(oop java_class); 252 static oop init_lock(oop java_class); 253 static oop component_mirror(oop java_class); 254 static objArrayOop signers(oop java_class); 255 static void set_signers(oop java_class, objArrayOop signers); 256 257 static oop class_loader(oop java_class); 258 static void set_module(oop java_class, oop module); 259 static oop module(oop java_class); 260 261 static int oop_size(oop java_class); 262 static void set_oop_size(oop java_class, int size); 263 static int static_oop_field_count(oop java_class); 264 static void set_static_oop_field_count(oop java_class, int size); 265 266 static GrowableArray<Klass*>* fixup_mirror_list() { 267 return _fixup_mirror_list; 268 } 269 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 270 _fixup_mirror_list = v; 271 } 272 273 static GrowableArray<Klass*>* fixup_module_field_list() { 274 return _fixup_module_field_list; 275 } 276 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) { 277 _fixup_module_field_list = v; 278 } 279 280 // Debugging 281 friend class JavaClasses; 282 friend class InstanceKlass; // verification code accesses offsets 283 friend class ClassFileParser; // access to number_of_fake_fields 284 }; 285 286 // Interface to java.lang.Thread objects 287 288 class java_lang_Thread : AllStatic { 289 private: 290 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 291 // so we compute the offsets at startup rather than hard-wiring them. 292 static int _name_offset; 293 static int _group_offset; 294 static int _contextClassLoader_offset; 295 static int _inheritedAccessControlContext_offset; 296 static int _priority_offset; 297 static int _eetop_offset; 298 static int _daemon_offset; 299 static int _stillborn_offset; 300 static int _stackSize_offset; 301 static int _tid_offset; 302 static int _thread_status_offset; 303 static int _park_blocker_offset; 304 static int _park_event_offset ; 305 306 static void compute_offsets(); 307 308 public: 309 // Instance creation 310 static oop create(); 311 // Returns the JavaThread associated with the thread obj 312 static JavaThread* thread(oop java_thread); 313 // Set JavaThread for instance 314 static void set_thread(oop java_thread, JavaThread* thread); 315 // Name 316 static oop name(oop java_thread); 317 static void set_name(oop java_thread, oop name); 318 // Priority 319 static ThreadPriority priority(oop java_thread); 320 static void set_priority(oop java_thread, ThreadPriority priority); 321 // Thread group 322 static oop threadGroup(oop java_thread); 323 // Stillborn 324 static bool is_stillborn(oop java_thread); 325 static void set_stillborn(oop java_thread); 326 // Alive (NOTE: this is not really a field, but provides the correct 327 // definition without doing a Java call) 328 static bool is_alive(oop java_thread); 329 // Daemon 330 static bool is_daemon(oop java_thread); 331 static void set_daemon(oop java_thread); 332 // Context ClassLoader 333 static oop context_class_loader(oop java_thread); 334 // Control context 335 static oop inherited_access_control_context(oop java_thread); 336 // Stack size hint 337 static jlong stackSize(oop java_thread); 338 // Thread ID 339 static jlong thread_id(oop java_thread); 340 341 // Blocker object responsible for thread parking 342 static oop park_blocker(oop java_thread); 343 344 // Pointer to type-stable park handler, encoded as jlong. 345 // Should be set when apparently null 346 // For details, see unsafe.cpp Unsafe_Unpark 347 static jlong park_event(oop java_thread); 348 static bool set_park_event(oop java_thread, jlong ptr); 349 350 // Java Thread Status for JVMTI and M&M use. 351 // This thread status info is saved in threadStatus field of 352 // java.lang.Thread java class. 353 enum ThreadStatus { 354 NEW = 0, 355 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 356 JVMTI_THREAD_STATE_RUNNABLE, 357 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 358 JVMTI_THREAD_STATE_WAITING + 359 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 360 JVMTI_THREAD_STATE_SLEEPING, 361 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 362 JVMTI_THREAD_STATE_WAITING + 363 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 364 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 365 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 366 JVMTI_THREAD_STATE_WAITING + 367 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 368 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 369 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 370 JVMTI_THREAD_STATE_WAITING + 371 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 372 JVMTI_THREAD_STATE_PARKED, 373 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 374 JVMTI_THREAD_STATE_WAITING + 375 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 376 JVMTI_THREAD_STATE_PARKED, 377 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 378 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 379 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 380 }; 381 // Write thread status info to threadStatus field of java.lang.Thread. 382 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 383 // Read thread status info from threadStatus field of java.lang.Thread. 384 static ThreadStatus get_thread_status(oop java_thread_oop); 385 386 static const char* thread_status_name(oop java_thread_oop); 387 388 // Debugging 389 friend class JavaClasses; 390 }; 391 392 // Interface to java.lang.ThreadGroup objects 393 394 class java_lang_ThreadGroup : AllStatic { 395 private: 396 static int _parent_offset; 397 static int _name_offset; 398 static int _threads_offset; 399 static int _groups_offset; 400 static int _maxPriority_offset; 401 static int _destroyed_offset; 402 static int _daemon_offset; 403 static int _nthreads_offset; 404 static int _ngroups_offset; 405 406 static void compute_offsets(); 407 408 public: 409 // parent ThreadGroup 410 static oop parent(oop java_thread_group); 411 // name 412 static const char* name(oop java_thread_group); 413 // ("name as oop" accessor is not necessary) 414 // Number of threads in group 415 static int nthreads(oop java_thread_group); 416 // threads 417 static objArrayOop threads(oop java_thread_group); 418 // Number of threads in group 419 static int ngroups(oop java_thread_group); 420 // groups 421 static objArrayOop groups(oop java_thread_group); 422 // maxPriority in group 423 static ThreadPriority maxPriority(oop java_thread_group); 424 // Destroyed 425 static bool is_destroyed(oop java_thread_group); 426 // Daemon 427 static bool is_daemon(oop java_thread_group); 428 // Debugging 429 friend class JavaClasses; 430 }; 431 432 433 434 // Interface to java.lang.Throwable objects 435 436 class java_lang_Throwable: AllStatic { 437 friend class BacktraceBuilder; 438 friend class BacktraceIterator; 439 440 private: 441 // Offsets 442 enum { 443 hc_backtrace_offset = 0, 444 hc_detailMessage_offset = 1, 445 hc_cause_offset = 2, // New since 1.4 446 hc_stackTrace_offset = 3 // New since 1.4 447 }; 448 // Trace constants 449 enum { 450 trace_methods_offset = 0, 451 trace_bcis_offset = 1, 452 trace_mirrors_offset = 2, 453 trace_names_offset = 3, 454 trace_next_offset = 4, 455 trace_size = 5, 456 trace_chunk_size = 32 457 }; 458 459 static int backtrace_offset; 460 static int detailMessage_offset; 461 static int stackTrace_offset; 462 static int depth_offset; 463 static int static_unassigned_stacktrace_offset; 464 465 // StackTrace (programmatic access, new since 1.4) 466 static void clear_stacktrace(oop throwable); 467 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 468 static void set_stacktrace(oop throwable, oop st_element_array); 469 static oop unassigned_stacktrace(); 470 471 public: 472 // Backtrace 473 static oop backtrace(oop throwable); 474 static void set_backtrace(oop throwable, oop value); 475 static int depth(oop throwable); 476 static void set_depth(oop throwable, int value); 477 // Needed by JVMTI to filter out this internal field. 478 static int get_backtrace_offset() { return backtrace_offset;} 479 static int get_detailMessage_offset() { return detailMessage_offset;} 480 // Message 481 static oop message(oop throwable); 482 static void set_message(oop throwable, oop value); 483 static Symbol* detail_message(oop throwable); 484 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 485 static void print_stack_usage(Handle stream); 486 487 static void compute_offsets(); 488 489 // Allocate space for backtrace (created but stack trace not filled in) 490 static void allocate_backtrace(Handle throwable, TRAPS); 491 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 492 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 493 // Fill in current stack trace, can cause GC 494 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 495 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 496 // Programmatic access to stack trace 497 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 498 // Printing 499 static void print(oop throwable, outputStream* st); 500 static void print_stack_trace(Handle throwable, outputStream* st); 501 static void java_printStackTrace(Handle throwable, TRAPS); 502 // Debugging 503 friend class JavaClasses; 504 }; 505 506 507 // Interface to java.lang.reflect.AccessibleObject objects 508 509 class java_lang_reflect_AccessibleObject: AllStatic { 510 private: 511 // Note that to reduce dependencies on the JDK we compute these 512 // offsets at run-time. 513 static int override_offset; 514 515 static void compute_offsets(); 516 517 public: 518 // Accessors 519 static jboolean override(oop reflect); 520 static void set_override(oop reflect, jboolean value); 521 522 // Debugging 523 friend class JavaClasses; 524 }; 525 526 527 // Interface to java.lang.reflect.Method objects 528 529 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 530 private: 531 // Note that to reduce dependencies on the JDK we compute these 532 // offsets at run-time. 533 static int clazz_offset; 534 static int name_offset; 535 static int returnType_offset; 536 static int parameterTypes_offset; 537 static int exceptionTypes_offset; 538 static int slot_offset; 539 static int modifiers_offset; 540 static int signature_offset; 541 static int annotations_offset; 542 static int parameter_annotations_offset; 543 static int annotation_default_offset; 544 static int type_annotations_offset; 545 546 static void compute_offsets(); 547 548 public: 549 // Allocation 550 static Handle create(TRAPS); 551 552 // Accessors 553 static oop clazz(oop reflect); 554 static void set_clazz(oop reflect, oop value); 555 556 static oop name(oop method); 557 static void set_name(oop method, oop value); 558 559 static oop return_type(oop method); 560 static void set_return_type(oop method, oop value); 561 562 static oop parameter_types(oop method); 563 static void set_parameter_types(oop method, oop value); 564 565 static oop exception_types(oop method); 566 static void set_exception_types(oop method, oop value); 567 568 static int slot(oop reflect); 569 static void set_slot(oop reflect, int value); 570 571 static int modifiers(oop method); 572 static void set_modifiers(oop method, int value); 573 574 static bool has_signature_field(); 575 static oop signature(oop method); 576 static void set_signature(oop method, oop value); 577 578 static bool has_annotations_field(); 579 static oop annotations(oop method); 580 static void set_annotations(oop method, oop value); 581 582 static bool has_parameter_annotations_field(); 583 static oop parameter_annotations(oop method); 584 static void set_parameter_annotations(oop method, oop value); 585 586 static bool has_annotation_default_field(); 587 static oop annotation_default(oop method); 588 static void set_annotation_default(oop method, oop value); 589 590 static bool has_type_annotations_field(); 591 static oop type_annotations(oop method); 592 static void set_type_annotations(oop method, oop value); 593 594 // Debugging 595 friend class JavaClasses; 596 }; 597 598 599 // Interface to java.lang.reflect.Constructor objects 600 601 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 602 private: 603 // Note that to reduce dependencies on the JDK we compute these 604 // offsets at run-time. 605 static int clazz_offset; 606 static int parameterTypes_offset; 607 static int exceptionTypes_offset; 608 static int slot_offset; 609 static int modifiers_offset; 610 static int signature_offset; 611 static int annotations_offset; 612 static int parameter_annotations_offset; 613 static int type_annotations_offset; 614 615 static void compute_offsets(); 616 617 public: 618 // Allocation 619 static Handle create(TRAPS); 620 621 // Accessors 622 static oop clazz(oop reflect); 623 static void set_clazz(oop reflect, oop value); 624 625 static oop parameter_types(oop constructor); 626 static void set_parameter_types(oop constructor, oop value); 627 628 static oop exception_types(oop constructor); 629 static void set_exception_types(oop constructor, oop value); 630 631 static int slot(oop reflect); 632 static void set_slot(oop reflect, int value); 633 634 static int modifiers(oop constructor); 635 static void set_modifiers(oop constructor, int value); 636 637 static bool has_signature_field(); 638 static oop signature(oop constructor); 639 static void set_signature(oop constructor, oop value); 640 641 static bool has_annotations_field(); 642 static oop annotations(oop constructor); 643 static void set_annotations(oop constructor, oop value); 644 645 static bool has_parameter_annotations_field(); 646 static oop parameter_annotations(oop method); 647 static void set_parameter_annotations(oop method, oop value); 648 649 static bool has_type_annotations_field(); 650 static oop type_annotations(oop constructor); 651 static void set_type_annotations(oop constructor, oop value); 652 653 // Debugging 654 friend class JavaClasses; 655 }; 656 657 658 // Interface to java.lang.reflect.Field objects 659 660 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 661 private: 662 // Note that to reduce dependencies on the JDK we compute these 663 // offsets at run-time. 664 static int clazz_offset; 665 static int name_offset; 666 static int type_offset; 667 static int slot_offset; 668 static int modifiers_offset; 669 static int signature_offset; 670 static int annotations_offset; 671 static int type_annotations_offset; 672 673 static void compute_offsets(); 674 675 public: 676 // Allocation 677 static Handle create(TRAPS); 678 679 // Accessors 680 static oop clazz(oop reflect); 681 static void set_clazz(oop reflect, oop value); 682 683 static oop name(oop field); 684 static void set_name(oop field, oop value); 685 686 static oop type(oop field); 687 static void set_type(oop field, oop value); 688 689 static int slot(oop reflect); 690 static void set_slot(oop reflect, int value); 691 692 static int modifiers(oop field); 693 static void set_modifiers(oop field, int value); 694 695 static bool has_signature_field(); 696 static oop signature(oop constructor); 697 static void set_signature(oop constructor, oop value); 698 699 static bool has_annotations_field(); 700 static oop annotations(oop constructor); 701 static void set_annotations(oop constructor, oop value); 702 703 static bool has_parameter_annotations_field(); 704 static oop parameter_annotations(oop method); 705 static void set_parameter_annotations(oop method, oop value); 706 707 static bool has_annotation_default_field(); 708 static oop annotation_default(oop method); 709 static void set_annotation_default(oop method, oop value); 710 711 static bool has_type_annotations_field(); 712 static oop type_annotations(oop field); 713 static void set_type_annotations(oop field, oop value); 714 715 // Debugging 716 friend class JavaClasses; 717 }; 718 719 class java_lang_reflect_Parameter { 720 private: 721 // Note that to reduce dependencies on the JDK we compute these 722 // offsets at run-time. 723 static int name_offset; 724 static int modifiers_offset; 725 static int index_offset; 726 static int executable_offset; 727 728 static void compute_offsets(); 729 730 public: 731 // Allocation 732 static Handle create(TRAPS); 733 734 // Accessors 735 static oop name(oop field); 736 static void set_name(oop field, oop value); 737 738 static int index(oop reflect); 739 static void set_index(oop reflect, int value); 740 741 static int modifiers(oop reflect); 742 static void set_modifiers(oop reflect, int value); 743 744 static oop executable(oop constructor); 745 static void set_executable(oop constructor, oop value); 746 747 friend class JavaClasses; 748 }; 749 750 #define MODULE_INJECTED_FIELDS(macro) \ 751 macro(java_lang_Module, module_entry, intptr_signature, false) 752 753 class java_lang_Module { 754 private: 755 static int loader_offset; 756 static int name_offset; 757 static int _module_entry_offset; 758 static void compute_offsets(); 759 760 public: 761 // Allocation 762 static Handle create(Handle loader, Handle module_name, TRAPS); 763 764 // Testers 765 static bool is_instance(oop obj); 766 767 // Accessors 768 static oop loader(oop module); 769 static void set_loader(oop module, oop value); 770 771 static oop name(oop module); 772 static void set_name(oop module, oop value); 773 774 static ModuleEntry* module_entry(oop module, TRAPS); 775 static void set_module_entry(oop module, ModuleEntry* module_entry); 776 777 friend class JavaClasses; 778 }; 779 780 // Interface to jdk.internal.reflect.ConstantPool objects 781 class reflect_ConstantPool { 782 private: 783 // Note that to reduce dependencies on the JDK we compute these 784 // offsets at run-time. 785 static int _oop_offset; 786 787 static void compute_offsets(); 788 789 public: 790 // Allocation 791 static Handle create(TRAPS); 792 793 // Accessors 794 static void set_cp(oop reflect, ConstantPool* value); 795 static int oop_offset() { 796 return _oop_offset; 797 } 798 799 static ConstantPool* get_cp(oop reflect); 800 801 // Debugging 802 friend class JavaClasses; 803 }; 804 805 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 806 class reflect_UnsafeStaticFieldAccessorImpl { 807 private: 808 static int _base_offset; 809 static void compute_offsets(); 810 811 public: 812 static int base_offset() { 813 return _base_offset; 814 } 815 816 // Debugging 817 friend class JavaClasses; 818 }; 819 820 // Interface to java.lang primitive type boxing objects: 821 // - java.lang.Boolean 822 // - java.lang.Character 823 // - java.lang.Float 824 // - java.lang.Double 825 // - java.lang.Byte 826 // - java.lang.Short 827 // - java.lang.Integer 828 // - java.lang.Long 829 830 // This could be separated out into 8 individual classes. 831 832 class java_lang_boxing_object: AllStatic { 833 private: 834 enum { 835 hc_value_offset = 0 836 }; 837 static int value_offset; 838 static int long_value_offset; 839 840 static oop initialize_and_allocate(BasicType type, TRAPS); 841 public: 842 // Allocation. Returns a boxed value, or NULL for invalid type. 843 static oop create(BasicType type, jvalue* value, TRAPS); 844 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 845 static BasicType get_value(oop box, jvalue* value); 846 static BasicType set_value(oop box, jvalue* value); 847 static BasicType basic_type(oop box); 848 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 849 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 850 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 851 static void print(BasicType type, jvalue* value, outputStream* st); 852 853 static int value_offset_in_bytes(BasicType type) { 854 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 855 value_offset; 856 } 857 858 // Debugging 859 friend class JavaClasses; 860 }; 861 862 863 864 // Interface to java.lang.ref.Reference objects 865 866 class java_lang_ref_Reference: AllStatic { 867 public: 868 enum { 869 hc_referent_offset = 0, 870 hc_queue_offset = 1, 871 hc_next_offset = 2, 872 hc_discovered_offset = 3 // Is not last, see SoftRefs. 873 }; 874 875 static int referent_offset; 876 static int queue_offset; 877 static int next_offset; 878 static int discovered_offset; 879 880 // Accessors 881 static inline oop referent(oop ref); 882 static inline void set_referent(oop ref, oop value); 883 static inline void set_referent_raw(oop ref, oop value); 884 static inline HeapWord* referent_addr_raw(oop ref); 885 static inline oop next(oop ref); 886 static inline void set_next(oop ref, oop value); 887 static inline void set_next_raw(oop ref, oop value); 888 static inline HeapWord* next_addr_raw(oop ref); 889 static inline oop discovered(oop ref); 890 static inline void set_discovered(oop ref, oop value); 891 static inline void set_discovered_raw(oop ref, oop value); 892 static inline HeapWord* discovered_addr_raw(oop ref); 893 static bool is_referent_field(oop obj, ptrdiff_t offset); 894 static inline bool is_phantom(oop ref); 895 }; 896 897 898 // Interface to java.lang.ref.SoftReference objects 899 900 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 901 public: 902 static int timestamp_offset; 903 static int static_clock_offset; 904 905 // Accessors 906 static jlong timestamp(oop ref); 907 908 // Accessors for statics 909 static jlong clock(); 910 static void set_clock(jlong value); 911 912 static void compute_offsets(); 913 }; 914 915 // Interface to java.lang.invoke.MethodHandle objects 916 917 class MethodHandleEntry; 918 919 class java_lang_invoke_MethodHandle: AllStatic { 920 friend class JavaClasses; 921 922 private: 923 static int _type_offset; // the MethodType of this MH 924 static int _form_offset; // the LambdaForm of this MH 925 926 static void compute_offsets(); 927 928 public: 929 // Accessors 930 static oop type(oop mh); 931 static void set_type(oop mh, oop mtype); 932 933 static oop form(oop mh); 934 static void set_form(oop mh, oop lform); 935 936 // Testers 937 static bool is_subclass(Klass* klass) { 938 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 939 } 940 static bool is_instance(oop obj); 941 942 // Accessors for code generation: 943 static int type_offset_in_bytes() { return _type_offset; } 944 static int form_offset_in_bytes() { return _form_offset; } 945 }; 946 947 // Interface to java.lang.invoke.DirectMethodHandle objects 948 949 class java_lang_invoke_DirectMethodHandle: AllStatic { 950 friend class JavaClasses; 951 952 private: 953 static int _member_offset; // the MemberName of this DMH 954 955 static void compute_offsets(); 956 957 public: 958 // Accessors 959 static oop member(oop mh); 960 961 // Testers 962 static bool is_subclass(Klass* klass) { 963 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 964 } 965 static bool is_instance(oop obj); 966 967 // Accessors for code generation: 968 static int member_offset_in_bytes() { return _member_offset; } 969 }; 970 971 // Interface to java.lang.invoke.LambdaForm objects 972 // (These are a private interface for managing adapter code generation.) 973 974 class java_lang_invoke_LambdaForm: AllStatic { 975 friend class JavaClasses; 976 977 private: 978 static int _vmentry_offset; // type is MemberName 979 980 static void compute_offsets(); 981 982 public: 983 // Accessors 984 static oop vmentry(oop lform); 985 static void set_vmentry(oop lform, oop invoker); 986 987 // Testers 988 static bool is_subclass(Klass* klass) { 989 return SystemDictionary::LambdaForm_klass() != NULL && 990 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 991 } 992 static bool is_instance(oop obj); 993 994 // Accessors for code generation: 995 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 996 }; 997 998 999 // Interface to java.lang.invoke.MemberName objects 1000 // (These are a private interface for Java code to query the class hierarchy.) 1001 1002 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1003 macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \ 1004 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false) 1005 1006 class java_lang_invoke_ResolvedMethodName : AllStatic { 1007 friend class JavaClasses; 1008 1009 static int _vmtarget_offset; 1010 static int _vmholder_offset; 1011 1012 static void compute_offsets(); 1013 public: 1014 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1015 1016 static Method* vmtarget(oop resolved_method); 1017 static void set_vmtarget(oop resolved_method, Method* method); 1018 1019 // find or create resolved member name 1020 static oop find_resolved_method(const methodHandle& m, TRAPS); 1021 1022 static bool is_instance(oop resolved_method); 1023 }; 1024 1025 1026 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1027 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) 1028 1029 1030 class java_lang_invoke_MemberName: AllStatic { 1031 friend class JavaClasses; 1032 1033 private: 1034 // From java.lang.invoke.MemberName: 1035 // private Class<?> clazz; // class in which the method is defined 1036 // private String name; // may be null if not yet materialized 1037 // private Object type; // may be null if not yet materialized 1038 // private int flags; // modifier bits; see reflect.Modifier 1039 // private ResolvedMethodName method; // holds VM-specific target value 1040 // private intptr_t vmindex; // member index within class or interface 1041 static int _clazz_offset; 1042 static int _name_offset; 1043 static int _type_offset; 1044 static int _flags_offset; 1045 static int _method_offset; 1046 static int _vmindex_offset; 1047 1048 static void compute_offsets(); 1049 1050 public: 1051 // Accessors 1052 static oop clazz(oop mname); 1053 static void set_clazz(oop mname, oop clazz); 1054 1055 static oop type(oop mname); 1056 static void set_type(oop mname, oop type); 1057 1058 static oop name(oop mname); 1059 static void set_name(oop mname, oop name); 1060 1061 static int flags(oop mname); 1062 static void set_flags(oop mname, int flags); 1063 1064 // Link through ResolvedMethodName field to get Method* 1065 static Method* vmtarget(oop mname); 1066 static void set_method(oop mname, oop method); 1067 1068 static intptr_t vmindex(oop mname); 1069 static void set_vmindex(oop mname, intptr_t index); 1070 1071 // Testers 1072 static bool is_subclass(Klass* klass) { 1073 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1074 } 1075 static bool is_instance(oop obj); 1076 1077 static bool is_method(oop obj); 1078 1079 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1080 enum { 1081 MN_IS_METHOD = 0x00010000, // method (not constructor) 1082 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1083 MN_IS_FIELD = 0x00040000, // field 1084 MN_IS_TYPE = 0x00080000, // nested type 1085 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1086 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1087 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1088 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1089 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1090 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1091 }; 1092 1093 // Accessors for code generation: 1094 static int clazz_offset_in_bytes() { return _clazz_offset; } 1095 static int type_offset_in_bytes() { return _type_offset; } 1096 static int name_offset_in_bytes() { return _name_offset; } 1097 static int flags_offset_in_bytes() { return _flags_offset; } 1098 static int method_offset_in_bytes() { return _method_offset; } 1099 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1100 }; 1101 1102 1103 // Interface to java.lang.invoke.MethodType objects 1104 1105 class java_lang_invoke_MethodType: AllStatic { 1106 friend class JavaClasses; 1107 1108 private: 1109 static int _rtype_offset; 1110 static int _ptypes_offset; 1111 1112 static void compute_offsets(); 1113 1114 public: 1115 // Accessors 1116 static oop rtype(oop mt); 1117 static objArrayOop ptypes(oop mt); 1118 1119 static oop ptype(oop mt, int index); 1120 static int ptype_count(oop mt); 1121 1122 static int ptype_slot_count(oop mt); // extra counts for long/double 1123 static int rtype_slot_count(oop mt); // extra counts for long/double 1124 1125 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1126 static void print_signature(oop mt, outputStream* st); 1127 1128 static bool is_instance(oop obj); 1129 1130 static bool equals(oop mt1, oop mt2); 1131 1132 // Accessors for code generation: 1133 static int rtype_offset_in_bytes() { return _rtype_offset; } 1134 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1135 }; 1136 1137 1138 // Interface to java.lang.invoke.CallSite objects 1139 1140 class java_lang_invoke_CallSite: AllStatic { 1141 friend class JavaClasses; 1142 1143 private: 1144 static int _target_offset; 1145 static int _context_offset; 1146 1147 static void compute_offsets(); 1148 1149 public: 1150 // Accessors 1151 static oop target( oop site); 1152 static void set_target( oop site, oop target); 1153 static void set_target_volatile( oop site, oop target); 1154 1155 static oop context(oop site); 1156 1157 // Testers 1158 static bool is_subclass(Klass* klass) { 1159 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1160 } 1161 static bool is_instance(oop obj); 1162 1163 // Accessors for code generation: 1164 static int target_offset_in_bytes() { return _target_offset; } 1165 }; 1166 1167 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1168 1169 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1170 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1171 1172 class DependencyContext; 1173 1174 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1175 friend class JavaClasses; 1176 1177 private: 1178 static int _vmdependencies_offset; 1179 1180 static void compute_offsets(); 1181 1182 public: 1183 // Accessors 1184 static DependencyContext vmdependencies(oop context); 1185 1186 // Testers 1187 static bool is_subclass(Klass* klass) { 1188 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1189 } 1190 static bool is_instance(oop obj); 1191 }; 1192 1193 // Interface to java.security.AccessControlContext objects 1194 1195 class java_security_AccessControlContext: AllStatic { 1196 private: 1197 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1198 // so we compute the offsets at startup rather than hard-wiring them. 1199 static int _context_offset; 1200 static int _privilegedContext_offset; 1201 static int _isPrivileged_offset; 1202 static int _isAuthorized_offset; 1203 1204 static void compute_offsets(); 1205 public: 1206 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1207 1208 static bool is_authorized(Handle context); 1209 1210 // Debugging/initialization 1211 friend class JavaClasses; 1212 }; 1213 1214 1215 // Interface to java.lang.ClassLoader objects 1216 1217 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1218 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1219 1220 class java_lang_ClassLoader : AllStatic { 1221 private: 1222 static int _loader_data_offset; 1223 static bool offsets_computed; 1224 static int parent_offset; 1225 static int parallelCapable_offset; 1226 static int name_offset; 1227 static int unnamedModule_offset; 1228 1229 public: 1230 static void compute_offsets(); 1231 1232 static ClassLoaderData* loader_data(oop loader); 1233 static ClassLoaderData* cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data); 1234 1235 static oop parent(oop loader); 1236 static oop name(oop loader); 1237 static bool isAncestor(oop loader, oop cl); 1238 1239 // Support for parallelCapable field 1240 static bool parallelCapable(oop the_class_mirror); 1241 1242 static bool is_trusted_loader(oop loader); 1243 1244 // Return true if this is one of the class loaders associated with 1245 // the generated bytecodes for reflection. 1246 static bool is_reflection_class_loader(oop loader); 1247 1248 // Fix for 4474172 1249 static oop non_reflection_class_loader(oop loader); 1250 1251 // Testers 1252 static bool is_subclass(Klass* klass) { 1253 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1254 } 1255 static bool is_instance(oop obj); 1256 1257 static oop unnamedModule(oop loader); 1258 1259 // Debugging 1260 friend class JavaClasses; 1261 friend class ClassFileParser; // access to number_of_fake_fields 1262 }; 1263 1264 1265 // Interface to java.lang.System objects 1266 1267 class java_lang_System : AllStatic { 1268 private: 1269 static int static_in_offset; 1270 static int static_out_offset; 1271 static int static_err_offset; 1272 static int static_security_offset; 1273 1274 public: 1275 static int in_offset_in_bytes(); 1276 static int out_offset_in_bytes(); 1277 static int err_offset_in_bytes(); 1278 1279 static bool has_security_manager(); 1280 1281 static void compute_offsets(); 1282 1283 // Debugging 1284 friend class JavaClasses; 1285 }; 1286 1287 1288 // Interface to java.lang.StackTraceElement objects 1289 1290 class java_lang_StackTraceElement: AllStatic { 1291 private: 1292 static int declaringClassObject_offset; 1293 static int classLoaderName_offset; 1294 static int moduleName_offset; 1295 static int moduleVersion_offset; 1296 static int declaringClass_offset; 1297 static int methodName_offset; 1298 static int fileName_offset; 1299 static int lineNumber_offset; 1300 1301 // Setters 1302 static void set_classLoaderName(oop element, oop value); 1303 static void set_moduleName(oop element, oop value); 1304 static void set_moduleVersion(oop element, oop value); 1305 static void set_declaringClass(oop element, oop value); 1306 static void set_methodName(oop element, oop value); 1307 static void set_fileName(oop element, oop value); 1308 static void set_lineNumber(oop element, int value); 1309 static void set_declaringClassObject(oop element, oop value); 1310 1311 public: 1312 // Create an instance of StackTraceElement 1313 static oop create(const methodHandle& method, int bci, TRAPS); 1314 1315 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1316 int version, int bci, Symbol* name, TRAPS); 1317 1318 static void compute_offsets(); 1319 1320 // Debugging 1321 friend class JavaClasses; 1322 }; 1323 1324 1325 class Backtrace: AllStatic { 1326 public: 1327 // Helper backtrace functions to store bci|version together. 1328 static int merge_bci_and_version(int bci, int version); 1329 static int merge_mid_and_cpref(int mid, int cpref); 1330 static int bci_at(unsigned int merged); 1331 static int version_at(unsigned int merged); 1332 static int mid_at(unsigned int merged); 1333 static int cpref_at(unsigned int merged); 1334 static int get_line_number(const methodHandle& method, int bci); 1335 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1336 1337 // Debugging 1338 friend class JavaClasses; 1339 }; 1340 1341 // Interface to java.lang.StackFrameInfo objects 1342 1343 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1344 macro(java_lang_StackFrameInfo, version, short_signature, false) 1345 1346 class java_lang_StackFrameInfo: AllStatic { 1347 private: 1348 static int _memberName_offset; 1349 static int _bci_offset; 1350 static int _version_offset; 1351 1352 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1353 1354 public: 1355 // Setters 1356 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS); 1357 static void set_bci(oop info, int value); 1358 1359 static void set_version(oop info, short value); 1360 1361 static void compute_offsets(); 1362 1363 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1364 1365 // Debugging 1366 friend class JavaClasses; 1367 }; 1368 1369 class java_lang_LiveStackFrameInfo: AllStatic { 1370 private: 1371 static int _monitors_offset; 1372 static int _locals_offset; 1373 static int _operands_offset; 1374 static int _mode_offset; 1375 1376 public: 1377 static void set_monitors(oop info, oop value); 1378 static void set_locals(oop info, oop value); 1379 static void set_operands(oop info, oop value); 1380 static void set_mode(oop info, int value); 1381 1382 static void compute_offsets(); 1383 1384 // Debugging 1385 friend class JavaClasses; 1386 }; 1387 1388 // Interface to java.lang.AssertionStatusDirectives objects 1389 1390 class java_lang_AssertionStatusDirectives: AllStatic { 1391 private: 1392 static int classes_offset; 1393 static int classEnabled_offset; 1394 static int packages_offset; 1395 static int packageEnabled_offset; 1396 static int deflt_offset; 1397 1398 public: 1399 // Setters 1400 static void set_classes(oop obj, oop val); 1401 static void set_classEnabled(oop obj, oop val); 1402 static void set_packages(oop obj, oop val); 1403 static void set_packageEnabled(oop obj, oop val); 1404 static void set_deflt(oop obj, bool val); 1405 1406 static void compute_offsets(); 1407 1408 // Debugging 1409 friend class JavaClasses; 1410 }; 1411 1412 1413 class java_nio_Buffer: AllStatic { 1414 private: 1415 static int _limit_offset; 1416 1417 public: 1418 static int limit_offset(); 1419 static void compute_offsets(); 1420 }; 1421 1422 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1423 private: 1424 static int _owner_offset; 1425 public: 1426 static void initialize(TRAPS); 1427 static oop get_owner_threadObj(oop obj); 1428 }; 1429 1430 // Use to declare fields that need to be injected into Java classes 1431 // for the JVM to use. The name_index and signature_index are 1432 // declared in vmSymbols. The may_be_java flag is used to declare 1433 // fields that might already exist in Java but should be injected if 1434 // they don't. Otherwise the field is unconditionally injected and 1435 // the JVM uses the injected one. This is to ensure that name 1436 // collisions don't occur. In general may_be_java should be false 1437 // unless there's a good reason. 1438 1439 class InjectedField { 1440 public: 1441 const SystemDictionary::WKID klass_id; 1442 const vmSymbols::SID name_index; 1443 const vmSymbols::SID signature_index; 1444 const bool may_be_java; 1445 1446 1447 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1448 Symbol* name() const { return lookup_symbol(name_index); } 1449 Symbol* signature() const { return lookup_symbol(signature_index); } 1450 1451 int compute_offset(); 1452 1453 // Find the Symbol for this index 1454 static Symbol* lookup_symbol(int symbol_index) { 1455 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1456 } 1457 }; 1458 1459 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1460 klass##_##name##_enum, 1461 1462 #define ALL_INJECTED_FIELDS(macro) \ 1463 CLASS_INJECTED_FIELDS(macro) \ 1464 CLASSLOADER_INJECTED_FIELDS(macro) \ 1465 RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1466 MEMBERNAME_INJECTED_FIELDS(macro) \ 1467 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1468 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1469 MODULE_INJECTED_FIELDS(macro) 1470 1471 // Interface to hard-coded offset checking 1472 1473 class JavaClasses : AllStatic { 1474 private: 1475 1476 static InjectedField _injected_fields[]; 1477 1478 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1479 public: 1480 enum InjectedFieldID { 1481 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1482 MAX_enum 1483 }; 1484 1485 static int compute_injected_offset(InjectedFieldID id); 1486 1487 static void compute_hard_coded_offsets(); 1488 static void compute_offsets(); 1489 static void check_offsets() PRODUCT_RETURN; 1490 1491 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1492 }; 1493 1494 #undef DECLARE_INJECTED_FIELD_ENUM 1495 1496 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP