1 /* 2 * Copyright (c) 1997, 2017, 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 enum { 449 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 450 }; 451 // Trace constants 452 enum { 453 trace_methods_offset = 0, 454 trace_bcis_offset = 1, 455 trace_mirrors_offset = 2, 456 trace_names_offset = 3, 457 trace_next_offset = 4, 458 trace_size = 5, 459 trace_chunk_size = 32 460 }; 461 462 static int backtrace_offset; 463 static int detailMessage_offset; 464 static int stackTrace_offset; 465 static int depth_offset; 466 static int static_unassigned_stacktrace_offset; 467 468 // StackTrace (programmatic access, new since 1.4) 469 static void clear_stacktrace(oop throwable); 470 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 471 static void set_stacktrace(oop throwable, oop st_element_array); 472 static oop unassigned_stacktrace(); 473 474 public: 475 // Backtrace 476 static oop backtrace(oop throwable); 477 static void set_backtrace(oop throwable, oop value); 478 static int depth(oop throwable); 479 static void set_depth(oop throwable, int value); 480 // Needed by JVMTI to filter out this internal field. 481 static int get_backtrace_offset() { return backtrace_offset;} 482 static int get_detailMessage_offset() { return detailMessage_offset;} 483 // Message 484 static oop message(oop throwable); 485 static void set_message(oop throwable, oop value); 486 static Symbol* detail_message(oop throwable); 487 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 488 static void print_stack_usage(Handle stream); 489 490 static void compute_offsets(); 491 492 // Allocate space for backtrace (created but stack trace not filled in) 493 static void allocate_backtrace(Handle throwable, TRAPS); 494 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 495 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 496 // Fill in current stack trace, can cause GC 497 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 498 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 499 // Programmatic access to stack trace 500 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 501 // Printing 502 static void print(oop throwable, outputStream* st); 503 static void print_stack_trace(Handle throwable, outputStream* st); 504 static void java_printStackTrace(Handle throwable, TRAPS); 505 // Debugging 506 friend class JavaClasses; 507 }; 508 509 510 // Interface to java.lang.reflect.AccessibleObject objects 511 512 class java_lang_reflect_AccessibleObject: AllStatic { 513 private: 514 // Note that to reduce dependencies on the JDK we compute these 515 // offsets at run-time. 516 static int override_offset; 517 518 static void compute_offsets(); 519 520 public: 521 // Accessors 522 static jboolean override(oop reflect); 523 static void set_override(oop reflect, jboolean value); 524 525 // Debugging 526 friend class JavaClasses; 527 }; 528 529 530 // Interface to java.lang.reflect.Method objects 531 532 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 533 private: 534 // Note that to reduce dependencies on the JDK we compute these 535 // offsets at run-time. 536 static int clazz_offset; 537 static int name_offset; 538 static int returnType_offset; 539 static int parameterTypes_offset; 540 static int exceptionTypes_offset; 541 static int slot_offset; 542 static int modifiers_offset; 543 static int signature_offset; 544 static int annotations_offset; 545 static int parameter_annotations_offset; 546 static int annotation_default_offset; 547 static int type_annotations_offset; 548 549 static void compute_offsets(); 550 551 public: 552 // Allocation 553 static Handle create(TRAPS); 554 555 // Accessors 556 static oop clazz(oop reflect); 557 static void set_clazz(oop reflect, oop value); 558 559 static oop name(oop method); 560 static void set_name(oop method, oop value); 561 562 static oop return_type(oop method); 563 static void set_return_type(oop method, oop value); 564 565 static oop parameter_types(oop method); 566 static void set_parameter_types(oop method, oop value); 567 568 static oop exception_types(oop method); 569 static void set_exception_types(oop method, oop value); 570 571 static int slot(oop reflect); 572 static void set_slot(oop reflect, int value); 573 574 static int modifiers(oop method); 575 static void set_modifiers(oop method, int value); 576 577 static bool has_signature_field(); 578 static oop signature(oop method); 579 static void set_signature(oop method, oop value); 580 581 static bool has_annotations_field(); 582 static oop annotations(oop method); 583 static void set_annotations(oop method, oop value); 584 585 static bool has_parameter_annotations_field(); 586 static oop parameter_annotations(oop method); 587 static void set_parameter_annotations(oop method, oop value); 588 589 static bool has_annotation_default_field(); 590 static oop annotation_default(oop method); 591 static void set_annotation_default(oop method, oop value); 592 593 static bool has_type_annotations_field(); 594 static oop type_annotations(oop method); 595 static void set_type_annotations(oop method, oop value); 596 597 // Debugging 598 friend class JavaClasses; 599 }; 600 601 602 // Interface to java.lang.reflect.Constructor objects 603 604 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 605 private: 606 // Note that to reduce dependencies on the JDK we compute these 607 // offsets at run-time. 608 static int clazz_offset; 609 static int parameterTypes_offset; 610 static int exceptionTypes_offset; 611 static int slot_offset; 612 static int modifiers_offset; 613 static int signature_offset; 614 static int annotations_offset; 615 static int parameter_annotations_offset; 616 static int type_annotations_offset; 617 618 static void compute_offsets(); 619 620 public: 621 // Allocation 622 static Handle create(TRAPS); 623 624 // Accessors 625 static oop clazz(oop reflect); 626 static void set_clazz(oop reflect, oop value); 627 628 static oop parameter_types(oop constructor); 629 static void set_parameter_types(oop constructor, oop value); 630 631 static oop exception_types(oop constructor); 632 static void set_exception_types(oop constructor, oop value); 633 634 static int slot(oop reflect); 635 static void set_slot(oop reflect, int value); 636 637 static int modifiers(oop constructor); 638 static void set_modifiers(oop constructor, int value); 639 640 static bool has_signature_field(); 641 static oop signature(oop constructor); 642 static void set_signature(oop constructor, oop value); 643 644 static bool has_annotations_field(); 645 static oop annotations(oop constructor); 646 static void set_annotations(oop constructor, oop value); 647 648 static bool has_parameter_annotations_field(); 649 static oop parameter_annotations(oop method); 650 static void set_parameter_annotations(oop method, oop value); 651 652 static bool has_type_annotations_field(); 653 static oop type_annotations(oop constructor); 654 static void set_type_annotations(oop constructor, oop value); 655 656 // Debugging 657 friend class JavaClasses; 658 }; 659 660 661 // Interface to java.lang.reflect.Field objects 662 663 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 664 private: 665 // Note that to reduce dependencies on the JDK we compute these 666 // offsets at run-time. 667 static int clazz_offset; 668 static int name_offset; 669 static int type_offset; 670 static int slot_offset; 671 static int modifiers_offset; 672 static int signature_offset; 673 static int annotations_offset; 674 static int type_annotations_offset; 675 676 static void compute_offsets(); 677 678 public: 679 // Allocation 680 static Handle create(TRAPS); 681 682 // Accessors 683 static oop clazz(oop reflect); 684 static void set_clazz(oop reflect, oop value); 685 686 static oop name(oop field); 687 static void set_name(oop field, oop value); 688 689 static oop type(oop field); 690 static void set_type(oop field, oop value); 691 692 static int slot(oop reflect); 693 static void set_slot(oop reflect, int value); 694 695 static int modifiers(oop field); 696 static void set_modifiers(oop field, int value); 697 698 static bool has_signature_field(); 699 static oop signature(oop constructor); 700 static void set_signature(oop constructor, oop value); 701 702 static bool has_annotations_field(); 703 static oop annotations(oop constructor); 704 static void set_annotations(oop constructor, oop value); 705 706 static bool has_parameter_annotations_field(); 707 static oop parameter_annotations(oop method); 708 static void set_parameter_annotations(oop method, oop value); 709 710 static bool has_annotation_default_field(); 711 static oop annotation_default(oop method); 712 static void set_annotation_default(oop method, oop value); 713 714 static bool has_type_annotations_field(); 715 static oop type_annotations(oop field); 716 static void set_type_annotations(oop field, oop value); 717 718 // Debugging 719 friend class JavaClasses; 720 }; 721 722 class java_lang_reflect_Parameter { 723 private: 724 // Note that to reduce dependencies on the JDK we compute these 725 // offsets at run-time. 726 static int name_offset; 727 static int modifiers_offset; 728 static int index_offset; 729 static int executable_offset; 730 731 static void compute_offsets(); 732 733 public: 734 // Allocation 735 static Handle create(TRAPS); 736 737 // Accessors 738 static oop name(oop field); 739 static void set_name(oop field, oop value); 740 741 static int index(oop reflect); 742 static void set_index(oop reflect, int value); 743 744 static int modifiers(oop reflect); 745 static void set_modifiers(oop reflect, int value); 746 747 static oop executable(oop constructor); 748 static void set_executable(oop constructor, oop value); 749 750 friend class JavaClasses; 751 }; 752 753 #define MODULE_INJECTED_FIELDS(macro) \ 754 macro(java_lang_Module, module_entry, intptr_signature, false) 755 756 class java_lang_Module { 757 private: 758 static int loader_offset; 759 static int name_offset; 760 static int _module_entry_offset; 761 static void compute_offsets(); 762 763 public: 764 // Allocation 765 static Handle create(Handle loader, Handle module_name, TRAPS); 766 767 // Testers 768 static bool is_instance(oop obj); 769 770 // Accessors 771 static oop loader(oop module); 772 static void set_loader(oop module, oop value); 773 774 static oop name(oop module); 775 static void set_name(oop module, oop value); 776 777 static ModuleEntry* module_entry(oop module, TRAPS); 778 static void set_module_entry(oop module, ModuleEntry* module_entry); 779 780 friend class JavaClasses; 781 }; 782 783 // Interface to jdk.internal.reflect.ConstantPool objects 784 class reflect_ConstantPool { 785 private: 786 // Note that to reduce dependencies on the JDK we compute these 787 // offsets at run-time. 788 static int _oop_offset; 789 790 static void compute_offsets(); 791 792 public: 793 // Allocation 794 static Handle create(TRAPS); 795 796 // Accessors 797 static void set_cp(oop reflect, ConstantPool* value); 798 static int oop_offset() { 799 return _oop_offset; 800 } 801 802 static ConstantPool* get_cp(oop reflect); 803 804 // Debugging 805 friend class JavaClasses; 806 }; 807 808 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 809 class reflect_UnsafeStaticFieldAccessorImpl { 810 private: 811 static int _base_offset; 812 static void compute_offsets(); 813 814 public: 815 static int base_offset() { 816 return _base_offset; 817 } 818 819 // Debugging 820 friend class JavaClasses; 821 }; 822 823 // Interface to java.lang primitive type boxing objects: 824 // - java.lang.Boolean 825 // - java.lang.Character 826 // - java.lang.Float 827 // - java.lang.Double 828 // - java.lang.Byte 829 // - java.lang.Short 830 // - java.lang.Integer 831 // - java.lang.Long 832 833 // This could be separated out into 8 individual classes. 834 835 class java_lang_boxing_object: AllStatic { 836 private: 837 enum { 838 hc_value_offset = 0 839 }; 840 static int value_offset; 841 static int long_value_offset; 842 843 static oop initialize_and_allocate(BasicType type, TRAPS); 844 public: 845 // Allocation. Returns a boxed value, or NULL for invalid type. 846 static oop create(BasicType type, jvalue* value, TRAPS); 847 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 848 static BasicType get_value(oop box, jvalue* value); 849 static BasicType set_value(oop box, jvalue* value); 850 static BasicType basic_type(oop box); 851 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 852 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 853 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 854 static void print(BasicType type, jvalue* value, outputStream* st); 855 856 static int value_offset_in_bytes(BasicType type) { 857 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 858 value_offset; 859 } 860 861 // Debugging 862 friend class JavaClasses; 863 }; 864 865 866 867 // Interface to java.lang.ref.Reference objects 868 869 class java_lang_ref_Reference: AllStatic { 870 public: 871 enum { 872 hc_referent_offset = 0, 873 hc_queue_offset = 1, 874 hc_next_offset = 2, 875 hc_discovered_offset = 3 // Is not last, see SoftRefs. 876 }; 877 878 static int referent_offset; 879 static int queue_offset; 880 static int next_offset; 881 static int discovered_offset; 882 static int number_of_fake_oop_fields; 883 884 // Accessors 885 static inline oop referent(oop ref); 886 static inline void set_referent(oop ref, oop value); 887 static inline void set_referent_raw(oop ref, oop value); 888 static inline HeapWord* referent_addr(oop ref); 889 static inline oop next(oop ref); 890 static inline void set_next(oop ref, oop value); 891 static inline void set_next_raw(oop ref, oop value); 892 static inline HeapWord* next_addr(oop ref); 893 static inline oop discovered(oop ref); 894 static inline void set_discovered(oop ref, oop value); 895 static inline void set_discovered_raw(oop ref, oop value); 896 static inline HeapWord* discovered_addr(oop ref); 897 static bool is_referent_field(oop obj, ptrdiff_t offset); 898 static inline bool is_phantom(oop ref); 899 }; 900 901 902 // Interface to java.lang.ref.SoftReference objects 903 904 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 905 public: 906 enum { 907 // The timestamp is a long field and may need to be adjusted for alignment. 908 hc_timestamp_offset = hc_discovered_offset + 1 909 }; 910 enum { 911 hc_static_clock_offset = 0 912 }; 913 914 static int timestamp_offset; 915 static int static_clock_offset; 916 917 // Accessors 918 static jlong timestamp(oop ref); 919 920 // Accessors for statics 921 static jlong clock(); 922 static void set_clock(jlong value); 923 }; 924 925 // Interface to java.lang.invoke.MethodHandle objects 926 927 class MethodHandleEntry; 928 929 class java_lang_invoke_MethodHandle: AllStatic { 930 friend class JavaClasses; 931 932 private: 933 static int _type_offset; // the MethodType of this MH 934 static int _form_offset; // the LambdaForm of this MH 935 936 static void compute_offsets(); 937 938 public: 939 // Accessors 940 static oop type(oop mh); 941 static void set_type(oop mh, oop mtype); 942 943 static oop form(oop mh); 944 static void set_form(oop mh, oop lform); 945 946 // Testers 947 static bool is_subclass(Klass* klass) { 948 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 949 } 950 static bool is_instance(oop obj); 951 952 // Accessors for code generation: 953 static int type_offset_in_bytes() { return _type_offset; } 954 static int form_offset_in_bytes() { return _form_offset; } 955 }; 956 957 // Interface to java.lang.invoke.DirectMethodHandle objects 958 959 class java_lang_invoke_DirectMethodHandle: AllStatic { 960 friend class JavaClasses; 961 962 private: 963 static int _member_offset; // the MemberName of this DMH 964 965 static void compute_offsets(); 966 967 public: 968 // Accessors 969 static oop member(oop mh); 970 971 // Testers 972 static bool is_subclass(Klass* klass) { 973 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 974 } 975 static bool is_instance(oop obj); 976 977 // Accessors for code generation: 978 static int member_offset_in_bytes() { return _member_offset; } 979 }; 980 981 // Interface to java.lang.invoke.LambdaForm objects 982 // (These are a private interface for managing adapter code generation.) 983 984 class java_lang_invoke_LambdaForm: AllStatic { 985 friend class JavaClasses; 986 987 private: 988 static int _vmentry_offset; // type is MemberName 989 990 static void compute_offsets(); 991 992 public: 993 // Accessors 994 static oop vmentry(oop lform); 995 static void set_vmentry(oop lform, oop invoker); 996 997 // Testers 998 static bool is_subclass(Klass* klass) { 999 return SystemDictionary::LambdaForm_klass() != NULL && 1000 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1001 } 1002 static bool is_instance(oop obj); 1003 1004 // Accessors for code generation: 1005 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1006 }; 1007 1008 1009 // Interface to java.lang.invoke.MemberName objects 1010 // (These are a private interface for Java code to query the class hierarchy.) 1011 1012 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1013 macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \ 1014 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false) 1015 1016 class java_lang_invoke_ResolvedMethodName : AllStatic { 1017 friend class JavaClasses; 1018 1019 static int _vmtarget_offset; 1020 static int _vmholder_offset; 1021 1022 static void compute_offsets(); 1023 public: 1024 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1025 1026 static Method* vmtarget(oop resolved_method); 1027 static void set_vmtarget(oop resolved_method, Method* method); 1028 1029 // find or create resolved member name 1030 static oop find_resolved_method(const methodHandle& m, TRAPS); 1031 1032 static bool is_instance(oop resolved_method); 1033 }; 1034 1035 1036 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1037 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) 1038 1039 1040 class java_lang_invoke_MemberName: AllStatic { 1041 friend class JavaClasses; 1042 1043 private: 1044 // From java.lang.invoke.MemberName: 1045 // private Class<?> clazz; // class in which the method is defined 1046 // private String name; // may be null if not yet materialized 1047 // private Object type; // may be null if not yet materialized 1048 // private int flags; // modifier bits; see reflect.Modifier 1049 // private ResolvedMethodName method; // holds VM-specific target value 1050 // private intptr_t vmindex; // member index within class or interface 1051 static int _clazz_offset; 1052 static int _name_offset; 1053 static int _type_offset; 1054 static int _flags_offset; 1055 static int _method_offset; 1056 static int _vmindex_offset; 1057 1058 static void compute_offsets(); 1059 1060 public: 1061 // Accessors 1062 static oop clazz(oop mname); 1063 static void set_clazz(oop mname, oop clazz); 1064 1065 static oop type(oop mname); 1066 static void set_type(oop mname, oop type); 1067 1068 static oop name(oop mname); 1069 static void set_name(oop mname, oop name); 1070 1071 static int flags(oop mname); 1072 static void set_flags(oop mname, int flags); 1073 1074 // Link through ResolvedMethodName field to get Method* 1075 static Method* vmtarget(oop mname); 1076 static void set_method(oop mname, oop method); 1077 1078 static intptr_t vmindex(oop mname); 1079 static void set_vmindex(oop mname, intptr_t index); 1080 1081 // Testers 1082 static bool is_subclass(Klass* klass) { 1083 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1084 } 1085 static bool is_instance(oop obj); 1086 1087 static bool is_method(oop obj); 1088 1089 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1090 enum { 1091 MN_IS_METHOD = 0x00010000, // method (not constructor) 1092 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1093 MN_IS_FIELD = 0x00040000, // field 1094 MN_IS_TYPE = 0x00080000, // nested type 1095 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1096 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1097 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1098 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1099 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1100 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1101 }; 1102 1103 // Accessors for code generation: 1104 static int clazz_offset_in_bytes() { return _clazz_offset; } 1105 static int type_offset_in_bytes() { return _type_offset; } 1106 static int name_offset_in_bytes() { return _name_offset; } 1107 static int flags_offset_in_bytes() { return _flags_offset; } 1108 static int method_offset_in_bytes() { return _method_offset; } 1109 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1110 }; 1111 1112 1113 // Interface to java.lang.invoke.MethodType objects 1114 1115 class java_lang_invoke_MethodType: AllStatic { 1116 friend class JavaClasses; 1117 1118 private: 1119 static int _rtype_offset; 1120 static int _ptypes_offset; 1121 1122 static void compute_offsets(); 1123 1124 public: 1125 // Accessors 1126 static oop rtype(oop mt); 1127 static objArrayOop ptypes(oop mt); 1128 1129 static oop ptype(oop mt, int index); 1130 static int ptype_count(oop mt); 1131 1132 static int ptype_slot_count(oop mt); // extra counts for long/double 1133 static int rtype_slot_count(oop mt); // extra counts for long/double 1134 1135 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1136 static void print_signature(oop mt, outputStream* st); 1137 1138 static bool is_instance(oop obj); 1139 1140 static bool equals(oop mt1, oop mt2); 1141 1142 // Accessors for code generation: 1143 static int rtype_offset_in_bytes() { return _rtype_offset; } 1144 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1145 }; 1146 1147 1148 // Interface to java.lang.invoke.CallSite objects 1149 1150 class java_lang_invoke_CallSite: AllStatic { 1151 friend class JavaClasses; 1152 1153 private: 1154 static int _target_offset; 1155 static int _context_offset; 1156 1157 static void compute_offsets(); 1158 1159 public: 1160 // Accessors 1161 static oop target( oop site); 1162 static void set_target( oop site, oop target); 1163 static void set_target_volatile( oop site, oop target); 1164 1165 static oop context(oop site); 1166 1167 // Testers 1168 static bool is_subclass(Klass* klass) { 1169 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1170 } 1171 static bool is_instance(oop obj); 1172 1173 // Accessors for code generation: 1174 static int target_offset_in_bytes() { return _target_offset; } 1175 }; 1176 1177 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1178 1179 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1180 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1181 1182 class DependencyContext; 1183 1184 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1185 friend class JavaClasses; 1186 1187 private: 1188 static int _vmdependencies_offset; 1189 1190 static void compute_offsets(); 1191 1192 public: 1193 // Accessors 1194 static DependencyContext vmdependencies(oop context); 1195 1196 // Testers 1197 static bool is_subclass(Klass* klass) { 1198 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1199 } 1200 static bool is_instance(oop obj); 1201 }; 1202 1203 // Interface to java.security.AccessControlContext objects 1204 1205 class java_security_AccessControlContext: AllStatic { 1206 private: 1207 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1208 // so we compute the offsets at startup rather than hard-wiring them. 1209 static int _context_offset; 1210 static int _privilegedContext_offset; 1211 static int _isPrivileged_offset; 1212 static int _isAuthorized_offset; 1213 1214 static void compute_offsets(); 1215 public: 1216 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1217 1218 static bool is_authorized(Handle context); 1219 1220 // Debugging/initialization 1221 friend class JavaClasses; 1222 }; 1223 1224 1225 // Interface to java.lang.ClassLoader objects 1226 1227 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1228 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1229 1230 class java_lang_ClassLoader : AllStatic { 1231 private: 1232 // The fake offsets are added by the class loader when java.lang.Class is loaded 1233 enum { 1234 hc_parent_offset = 0 1235 }; 1236 static int _loader_data_offset; 1237 static bool offsets_computed; 1238 static int parent_offset; 1239 static int parallelCapable_offset; 1240 static int name_offset; 1241 static int unnamedModule_offset; 1242 1243 public: 1244 static void compute_offsets(); 1245 1246 static ClassLoaderData** loader_data_addr(oop loader); 1247 static ClassLoaderData* loader_data(oop loader); 1248 1249 static oop parent(oop loader); 1250 static oop name(oop loader); 1251 static bool isAncestor(oop loader, oop cl); 1252 1253 // Support for parallelCapable field 1254 static bool parallelCapable(oop the_class_mirror); 1255 1256 static bool is_trusted_loader(oop loader); 1257 1258 // Return true if this is one of the class loaders associated with 1259 // the generated bytecodes for reflection. 1260 static bool is_reflection_class_loader(oop loader); 1261 1262 // Fix for 4474172 1263 static oop non_reflection_class_loader(oop loader); 1264 1265 // Testers 1266 static bool is_subclass(Klass* klass) { 1267 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1268 } 1269 static bool is_instance(oop obj); 1270 1271 static oop unnamedModule(oop loader); 1272 1273 // Debugging 1274 friend class JavaClasses; 1275 friend class ClassFileParser; // access to number_of_fake_fields 1276 }; 1277 1278 1279 // Interface to java.lang.System objects 1280 1281 class java_lang_System : AllStatic { 1282 private: 1283 enum { 1284 hc_static_in_offset = 0, 1285 hc_static_out_offset = 1, 1286 hc_static_err_offset = 2, 1287 hc_static_security_offset = 3 1288 }; 1289 1290 static int static_in_offset; 1291 static int static_out_offset; 1292 static int static_err_offset; 1293 static int static_security_offset; 1294 1295 public: 1296 static int in_offset_in_bytes(); 1297 static int out_offset_in_bytes(); 1298 static int err_offset_in_bytes(); 1299 1300 static bool has_security_manager(); 1301 1302 // Debugging 1303 friend class JavaClasses; 1304 }; 1305 1306 1307 // Interface to java.lang.StackTraceElement objects 1308 1309 class java_lang_StackTraceElement: AllStatic { 1310 private: 1311 enum { 1312 hc_declaringClassObject_offset = 0, 1313 hc_classLoaderName_offset = 1, 1314 hc_moduleName_offset = 2, 1315 hc_moduleVersion_offset = 3, 1316 hc_declaringClass_offset = 4, 1317 hc_methodName_offset = 5, 1318 hc_fileName_offset = 6, 1319 hc_lineNumber_offset = 7 1320 }; 1321 1322 static int declaringClassObject_offset; 1323 static int classLoaderName_offset; 1324 static int moduleName_offset; 1325 static int moduleVersion_offset; 1326 static int declaringClass_offset; 1327 static int methodName_offset; 1328 static int fileName_offset; 1329 static int lineNumber_offset; 1330 1331 // Setters 1332 static void set_classLoaderName(oop element, oop value); 1333 static void set_moduleName(oop element, oop value); 1334 static void set_moduleVersion(oop element, oop value); 1335 static void set_declaringClass(oop element, oop value); 1336 static void set_methodName(oop element, oop value); 1337 static void set_fileName(oop element, oop value); 1338 static void set_lineNumber(oop element, int value); 1339 static void set_declaringClassObject(oop element, oop value); 1340 1341 public: 1342 // Create an instance of StackTraceElement 1343 static oop create(const methodHandle& method, int bci, TRAPS); 1344 1345 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1346 int version, int bci, Symbol* name, TRAPS); 1347 1348 // Debugging 1349 friend class JavaClasses; 1350 }; 1351 1352 1353 class Backtrace: AllStatic { 1354 public: 1355 // Helper backtrace functions to store bci|version together. 1356 static int merge_bci_and_version(int bci, int version); 1357 static int merge_mid_and_cpref(int mid, int cpref); 1358 static int bci_at(unsigned int merged); 1359 static int version_at(unsigned int merged); 1360 static int mid_at(unsigned int merged); 1361 static int cpref_at(unsigned int merged); 1362 static int get_line_number(const methodHandle& method, int bci); 1363 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1364 1365 // Debugging 1366 friend class JavaClasses; 1367 }; 1368 1369 // Interface to java.lang.StackFrameInfo objects 1370 1371 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1372 macro(java_lang_StackFrameInfo, version, short_signature, false) 1373 1374 class java_lang_StackFrameInfo: AllStatic { 1375 private: 1376 static int _memberName_offset; 1377 static int _bci_offset; 1378 static int _version_offset; 1379 1380 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1381 1382 public: 1383 // Setters 1384 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS); 1385 static void set_bci(oop info, int value); 1386 1387 static void set_version(oop info, short value); 1388 1389 static void compute_offsets(); 1390 1391 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1392 1393 // Debugging 1394 friend class JavaClasses; 1395 }; 1396 1397 class java_lang_LiveStackFrameInfo: AllStatic { 1398 private: 1399 static int _monitors_offset; 1400 static int _locals_offset; 1401 static int _operands_offset; 1402 static int _mode_offset; 1403 1404 public: 1405 static void set_monitors(oop info, oop value); 1406 static void set_locals(oop info, oop value); 1407 static void set_operands(oop info, oop value); 1408 static void set_mode(oop info, int value); 1409 1410 static void compute_offsets(); 1411 1412 // Debugging 1413 friend class JavaClasses; 1414 }; 1415 1416 // Interface to java.lang.AssertionStatusDirectives objects 1417 1418 class java_lang_AssertionStatusDirectives: AllStatic { 1419 private: 1420 enum { 1421 hc_classes_offset, 1422 hc_classEnabled_offset, 1423 hc_packages_offset, 1424 hc_packageEnabled_offset, 1425 hc_deflt_offset 1426 }; 1427 1428 static int classes_offset; 1429 static int classEnabled_offset; 1430 static int packages_offset; 1431 static int packageEnabled_offset; 1432 static int deflt_offset; 1433 1434 public: 1435 // Setters 1436 static void set_classes(oop obj, oop val); 1437 static void set_classEnabled(oop obj, oop val); 1438 static void set_packages(oop obj, oop val); 1439 static void set_packageEnabled(oop obj, oop val); 1440 static void set_deflt(oop obj, bool val); 1441 // Debugging 1442 friend class JavaClasses; 1443 }; 1444 1445 1446 class java_nio_Buffer: AllStatic { 1447 private: 1448 static int _limit_offset; 1449 1450 public: 1451 static int limit_offset(); 1452 static void compute_offsets(); 1453 }; 1454 1455 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1456 private: 1457 static int _owner_offset; 1458 public: 1459 static void initialize(TRAPS); 1460 static oop get_owner_threadObj(oop obj); 1461 }; 1462 1463 // Use to declare fields that need to be injected into Java classes 1464 // for the JVM to use. The name_index and signature_index are 1465 // declared in vmSymbols. The may_be_java flag is used to declare 1466 // fields that might already exist in Java but should be injected if 1467 // they don't. Otherwise the field is unconditionally injected and 1468 // the JVM uses the injected one. This is to ensure that name 1469 // collisions don't occur. In general may_be_java should be false 1470 // unless there's a good reason. 1471 1472 class InjectedField { 1473 public: 1474 const SystemDictionary::WKID klass_id; 1475 const vmSymbols::SID name_index; 1476 const vmSymbols::SID signature_index; 1477 const bool may_be_java; 1478 1479 1480 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1481 Symbol* name() const { return lookup_symbol(name_index); } 1482 Symbol* signature() const { return lookup_symbol(signature_index); } 1483 1484 int compute_offset(); 1485 1486 // Find the Symbol for this index 1487 static Symbol* lookup_symbol(int symbol_index) { 1488 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1489 } 1490 }; 1491 1492 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1493 klass##_##name##_enum, 1494 1495 #define ALL_INJECTED_FIELDS(macro) \ 1496 CLASS_INJECTED_FIELDS(macro) \ 1497 CLASSLOADER_INJECTED_FIELDS(macro) \ 1498 RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1499 MEMBERNAME_INJECTED_FIELDS(macro) \ 1500 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1501 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1502 MODULE_INJECTED_FIELDS(macro) 1503 1504 // Interface to hard-coded offset checking 1505 1506 class JavaClasses : AllStatic { 1507 private: 1508 1509 static InjectedField _injected_fields[]; 1510 1511 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1512 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1513 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1514 1515 public: 1516 enum InjectedFieldID { 1517 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1518 MAX_enum 1519 }; 1520 1521 static int compute_injected_offset(InjectedFieldID id); 1522 1523 static void compute_hard_coded_offsets(); 1524 static void compute_offsets(); 1525 static void check_offsets() PRODUCT_RETURN; 1526 1527 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1528 }; 1529 1530 #undef DECLARE_INJECTED_FIELD_ENUM 1531 1532 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP