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 unsigned int hash(oop java_string); 106 static inline bool is_latin1(oop java_string); 107 static inline int length(oop java_string); 108 static int utf8_length(oop java_string); 109 110 // String converters 111 static char* as_utf8_string(oop java_string); 112 static char* as_utf8_string(oop java_string, char* buf, int buflen); 113 static char* as_utf8_string(oop java_string, int start, int len); 114 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 115 static char* as_platform_dependent_str(Handle java_string, TRAPS); 116 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 117 // produce an ascii string with all other values quoted using \u#### 118 static char* as_quoted_ascii(oop java_string); 119 120 // Compute the hash value for a java.lang.String object which would 121 // contain the characters passed in. 122 // 123 // As the hash value used by the String object itself, in 124 // String.hashCode(). This value is normally calculated in Java code 125 // in the String.hashCode method(), but is precomputed for String 126 // objects in the shared archive file. 127 // hash P(31) from Kernighan & Ritchie 128 // 129 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 130 static unsigned int hash_code(const jchar* s, int len) { 131 unsigned int h = 0; 132 while (len-- > 0) { 133 h = 31*h + (unsigned int) *s; 134 s++; 135 } 136 return h; 137 } 138 139 static unsigned int hash_code(const jbyte* s, int len) { 140 unsigned int h = 0; 141 while (len-- > 0) { 142 h = 31*h + (((unsigned int) *s) & 0xFF); 143 s++; 144 } 145 return h; 146 } 147 148 static unsigned int hash_code(oop java_string); 149 150 static bool equals(oop java_string, jchar* chars, int len); 151 static bool equals(oop str1, oop str2); 152 153 // Conversion between '.' and '/' formats 154 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 155 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 156 157 // Conversion 158 static Symbol* as_symbol(oop java_string, TRAPS); 159 static Symbol* as_symbol_or_null(oop java_string); 160 161 // Testers 162 static bool is_instance(oop obj); 163 static inline bool is_instance_inlined(oop obj); 164 165 // Debugging 166 static void print(oop java_string, outputStream* st); 167 friend class JavaClasses; 168 friend class StringTable; 169 }; 170 171 172 // Interface to java.lang.Class objects 173 174 #define CLASS_INJECTED_FIELDS(macro) \ 175 macro(java_lang_Class, klass, intptr_signature, false) \ 176 macro(java_lang_Class, array_klass, intptr_signature, false) \ 177 macro(java_lang_Class, oop_size, int_signature, false) \ 178 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 179 macro(java_lang_Class, protection_domain, object_signature, false) \ 180 macro(java_lang_Class, signers, object_signature, false) 181 182 class java_lang_Class : AllStatic { 183 friend class VMStructs; 184 friend class JVMCIVMStructs; 185 186 private: 187 // The fake offsets are added by the class loader when java.lang.Class is loaded 188 189 static int _klass_offset; 190 static int _array_klass_offset; 191 192 static int _oop_size_offset; 193 static int _static_oop_field_count_offset; 194 195 static int _protection_domain_offset; 196 static int _init_lock_offset; 197 static int _signers_offset; 198 static int _class_loader_offset; 199 static int _module_offset; 200 static int _component_mirror_offset; 201 202 static bool offsets_computed; 203 static int classRedefinedCount_offset; 204 205 static GrowableArray<Klass*>* _fixup_mirror_list; 206 static GrowableArray<Klass*>* _fixup_module_field_list; 207 208 static void set_init_lock(oop java_class, oop init_lock); 209 static void set_protection_domain(oop java_class, oop protection_domain); 210 static void set_class_loader(oop java_class, oop class_loader); 211 static void set_component_mirror(oop java_class, oop comp_mirror); 212 static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS); 213 static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS); 214 public: 215 static void allocate_fixup_lists(); 216 static void compute_offsets(); 217 218 // Instance creation 219 static void create_mirror(Klass* k, Handle class_loader, Handle module, 220 Handle protection_domain, TRAPS); 221 static void fixup_mirror(Klass* k, TRAPS); 222 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 223 224 static void fixup_module_field(Klass* k, Handle module); 225 226 // Conversion 227 static Klass* as_Klass(oop java_class); 228 static void set_klass(oop java_class, Klass* klass); 229 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 230 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 231 static void print_signature(oop java_class, outputStream *st); 232 static const char* as_external_name(oop java_class); 233 // Testing 234 static bool is_instance(oop obj); 235 236 static bool is_primitive(oop java_class); 237 static BasicType primitive_type(oop java_class); 238 static oop primitive_mirror(BasicType t); 239 // JVM_NewArray support 240 static Klass* array_klass_acquire(oop java_class); 241 static void release_set_array_klass(oop java_class, Klass* klass); 242 // compiler support for class operations 243 static int klass_offset_in_bytes() { return _klass_offset; } 244 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 245 // Support for classRedefinedCount field 246 static int classRedefinedCount(oop the_class_mirror); 247 static void set_classRedefinedCount(oop the_class_mirror, int value); 248 249 // Support for embedded per-class oops 250 static oop protection_domain(oop java_class); 251 static oop init_lock(oop java_class); 252 static oop component_mirror(oop java_class); 253 static objArrayOop signers(oop java_class); 254 static void set_signers(oop java_class, objArrayOop signers); 255 256 static oop class_loader(oop java_class); 257 static void set_module(oop java_class, oop module); 258 static oop module(oop java_class); 259 260 static int oop_size(oop java_class); 261 static void set_oop_size(oop java_class, int size); 262 static int static_oop_field_count(oop java_class); 263 static void set_static_oop_field_count(oop java_class, int size); 264 265 static GrowableArray<Klass*>* fixup_mirror_list() { 266 return _fixup_mirror_list; 267 } 268 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 269 _fixup_mirror_list = v; 270 } 271 272 static GrowableArray<Klass*>* fixup_module_field_list() { 273 return _fixup_module_field_list; 274 } 275 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) { 276 _fixup_module_field_list = v; 277 } 278 279 // Debugging 280 friend class JavaClasses; 281 friend class InstanceKlass; // verification code accesses offsets 282 friend class ClassFileParser; // access to number_of_fake_fields 283 }; 284 285 // Interface to java.lang.Thread objects 286 287 class java_lang_Thread : AllStatic { 288 private: 289 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 290 // so we compute the offsets at startup rather than hard-wiring them. 291 static int _name_offset; 292 static int _group_offset; 293 static int _contextClassLoader_offset; 294 static int _inheritedAccessControlContext_offset; 295 static int _priority_offset; 296 static int _eetop_offset; 297 static int _daemon_offset; 298 static int _stillborn_offset; 299 static int _stackSize_offset; 300 static int _tid_offset; 301 static int _thread_status_offset; 302 static int _park_blocker_offset; 303 static int _park_event_offset ; 304 305 static void compute_offsets(); 306 307 public: 308 // Instance creation 309 static oop create(); 310 // Returns the JavaThread associated with the thread obj 311 static JavaThread* thread(oop java_thread); 312 // Set JavaThread for instance 313 static void set_thread(oop java_thread, JavaThread* thread); 314 // Name 315 static oop name(oop java_thread); 316 static void set_name(oop java_thread, oop name); 317 // Priority 318 static ThreadPriority priority(oop java_thread); 319 static void set_priority(oop java_thread, ThreadPriority priority); 320 // Thread group 321 static oop threadGroup(oop java_thread); 322 // Stillborn 323 static bool is_stillborn(oop java_thread); 324 static void set_stillborn(oop java_thread); 325 // Alive (NOTE: this is not really a field, but provides the correct 326 // definition without doing a Java call) 327 static bool is_alive(oop java_thread); 328 // Daemon 329 static bool is_daemon(oop java_thread); 330 static void set_daemon(oop java_thread); 331 // Context ClassLoader 332 static oop context_class_loader(oop java_thread); 333 // Control context 334 static oop inherited_access_control_context(oop java_thread); 335 // Stack size hint 336 static jlong stackSize(oop java_thread); 337 // Thread ID 338 static jlong thread_id(oop java_thread); 339 340 // Blocker object responsible for thread parking 341 static oop park_blocker(oop java_thread); 342 343 // Pointer to type-stable park handler, encoded as jlong. 344 // Should be set when apparently null 345 // For details, see unsafe.cpp Unsafe_Unpark 346 static jlong park_event(oop java_thread); 347 static bool set_park_event(oop java_thread, jlong ptr); 348 349 // Java Thread Status for JVMTI and M&M use. 350 // This thread status info is saved in threadStatus field of 351 // java.lang.Thread java class. 352 enum ThreadStatus { 353 NEW = 0, 354 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 355 JVMTI_THREAD_STATE_RUNNABLE, 356 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 357 JVMTI_THREAD_STATE_WAITING + 358 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 359 JVMTI_THREAD_STATE_SLEEPING, 360 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 361 JVMTI_THREAD_STATE_WAITING + 362 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 363 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 364 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 365 JVMTI_THREAD_STATE_WAITING + 366 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 367 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 368 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 369 JVMTI_THREAD_STATE_WAITING + 370 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 371 JVMTI_THREAD_STATE_PARKED, 372 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 373 JVMTI_THREAD_STATE_WAITING + 374 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 375 JVMTI_THREAD_STATE_PARKED, 376 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 377 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 378 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 379 }; 380 // Write thread status info to threadStatus field of java.lang.Thread. 381 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 382 // Read thread status info from threadStatus field of java.lang.Thread. 383 static ThreadStatus get_thread_status(oop java_thread_oop); 384 385 static const char* thread_status_name(oop java_thread_oop); 386 387 // Debugging 388 friend class JavaClasses; 389 }; 390 391 // Interface to java.lang.ThreadGroup objects 392 393 class java_lang_ThreadGroup : AllStatic { 394 private: 395 static int _parent_offset; 396 static int _name_offset; 397 static int _threads_offset; 398 static int _groups_offset; 399 static int _maxPriority_offset; 400 static int _destroyed_offset; 401 static int _daemon_offset; 402 static int _nthreads_offset; 403 static int _ngroups_offset; 404 405 static void compute_offsets(); 406 407 public: 408 // parent ThreadGroup 409 static oop parent(oop java_thread_group); 410 // name 411 static const char* name(oop java_thread_group); 412 // ("name as oop" accessor is not necessary) 413 // Number of threads in group 414 static int nthreads(oop java_thread_group); 415 // threads 416 static objArrayOop threads(oop java_thread_group); 417 // Number of threads in group 418 static int ngroups(oop java_thread_group); 419 // groups 420 static objArrayOop groups(oop java_thread_group); 421 // maxPriority in group 422 static ThreadPriority maxPriority(oop java_thread_group); 423 // Destroyed 424 static bool is_destroyed(oop java_thread_group); 425 // Daemon 426 static bool is_daemon(oop java_thread_group); 427 // Debugging 428 friend class JavaClasses; 429 }; 430 431 432 433 // Interface to java.lang.Throwable objects 434 435 class java_lang_Throwable: AllStatic { 436 friend class BacktraceBuilder; 437 friend class BacktraceIterator; 438 439 private: 440 // Offsets 441 enum { 442 hc_backtrace_offset = 0, 443 hc_detailMessage_offset = 1, 444 hc_cause_offset = 2, // New since 1.4 445 hc_stackTrace_offset = 3 // New since 1.4 446 }; 447 enum { 448 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 449 }; 450 // Trace constants 451 enum { 452 trace_methods_offset = 0, 453 trace_bcis_offset = 1, 454 trace_mirrors_offset = 2, 455 trace_names_offset = 3, 456 trace_next_offset = 4, 457 trace_size = 5, 458 trace_chunk_size = 32 459 }; 460 461 static int backtrace_offset; 462 static int detailMessage_offset; 463 static int stackTrace_offset; 464 static int depth_offset; 465 static int static_unassigned_stacktrace_offset; 466 467 // StackTrace (programmatic access, new since 1.4) 468 static void clear_stacktrace(oop throwable); 469 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 470 static void set_stacktrace(oop throwable, oop st_element_array); 471 static oop unassigned_stacktrace(); 472 473 public: 474 // Backtrace 475 static oop backtrace(oop throwable); 476 static void set_backtrace(oop throwable, oop value); 477 static int depth(oop throwable); 478 static void set_depth(oop throwable, int value); 479 // Needed by JVMTI to filter out this internal field. 480 static int get_backtrace_offset() { return backtrace_offset;} 481 static int get_detailMessage_offset() { return detailMessage_offset;} 482 // Message 483 static oop message(oop throwable); 484 static void set_message(oop throwable, oop value); 485 static Symbol* detail_message(oop throwable); 486 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 487 static void print_stack_usage(Handle stream); 488 489 static void compute_offsets(); 490 491 // Allocate space for backtrace (created but stack trace not filled in) 492 static void allocate_backtrace(Handle throwable, TRAPS); 493 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 494 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 495 // Fill in current stack trace, can cause GC 496 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 497 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 498 // Programmatic access to stack trace 499 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 500 // Printing 501 static void print(oop throwable, outputStream* st); 502 static void print_stack_trace(Handle throwable, outputStream* st); 503 static void java_printStackTrace(Handle throwable, TRAPS); 504 // Debugging 505 friend class JavaClasses; 506 }; 507 508 509 // Interface to java.lang.reflect.AccessibleObject objects 510 511 class java_lang_reflect_AccessibleObject: AllStatic { 512 private: 513 // Note that to reduce dependencies on the JDK we compute these 514 // offsets at run-time. 515 static int override_offset; 516 517 static void compute_offsets(); 518 519 public: 520 // Accessors 521 static jboolean override(oop reflect); 522 static void set_override(oop reflect, jboolean value); 523 524 // Debugging 525 friend class JavaClasses; 526 }; 527 528 529 // Interface to java.lang.reflect.Method objects 530 531 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 532 private: 533 // Note that to reduce dependencies on the JDK we compute these 534 // offsets at run-time. 535 static int clazz_offset; 536 static int name_offset; 537 static int returnType_offset; 538 static int parameterTypes_offset; 539 static int exceptionTypes_offset; 540 static int slot_offset; 541 static int modifiers_offset; 542 static int signature_offset; 543 static int annotations_offset; 544 static int parameter_annotations_offset; 545 static int annotation_default_offset; 546 static int type_annotations_offset; 547 548 static void compute_offsets(); 549 550 public: 551 // Allocation 552 static Handle create(TRAPS); 553 554 // Accessors 555 static oop clazz(oop reflect); 556 static void set_clazz(oop reflect, oop value); 557 558 static oop name(oop method); 559 static void set_name(oop method, oop value); 560 561 static oop return_type(oop method); 562 static void set_return_type(oop method, oop value); 563 564 static oop parameter_types(oop method); 565 static void set_parameter_types(oop method, oop value); 566 567 static oop exception_types(oop method); 568 static void set_exception_types(oop method, oop value); 569 570 static int slot(oop reflect); 571 static void set_slot(oop reflect, int value); 572 573 static int modifiers(oop method); 574 static void set_modifiers(oop method, int value); 575 576 static bool has_signature_field(); 577 static oop signature(oop method); 578 static void set_signature(oop method, oop value); 579 580 static bool has_annotations_field(); 581 static oop annotations(oop method); 582 static void set_annotations(oop method, oop value); 583 584 static bool has_parameter_annotations_field(); 585 static oop parameter_annotations(oop method); 586 static void set_parameter_annotations(oop method, oop value); 587 588 static bool has_annotation_default_field(); 589 static oop annotation_default(oop method); 590 static void set_annotation_default(oop method, oop value); 591 592 static bool has_type_annotations_field(); 593 static oop type_annotations(oop method); 594 static void set_type_annotations(oop method, oop value); 595 596 // Debugging 597 friend class JavaClasses; 598 }; 599 600 601 // Interface to java.lang.reflect.Constructor objects 602 603 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 604 private: 605 // Note that to reduce dependencies on the JDK we compute these 606 // offsets at run-time. 607 static int clazz_offset; 608 static int parameterTypes_offset; 609 static int exceptionTypes_offset; 610 static int slot_offset; 611 static int modifiers_offset; 612 static int signature_offset; 613 static int annotations_offset; 614 static int parameter_annotations_offset; 615 static int type_annotations_offset; 616 617 static void compute_offsets(); 618 619 public: 620 // Allocation 621 static Handle create(TRAPS); 622 623 // Accessors 624 static oop clazz(oop reflect); 625 static void set_clazz(oop reflect, oop value); 626 627 static oop parameter_types(oop constructor); 628 static void set_parameter_types(oop constructor, oop value); 629 630 static oop exception_types(oop constructor); 631 static void set_exception_types(oop constructor, oop value); 632 633 static int slot(oop reflect); 634 static void set_slot(oop reflect, int value); 635 636 static int modifiers(oop constructor); 637 static void set_modifiers(oop constructor, int value); 638 639 static bool has_signature_field(); 640 static oop signature(oop constructor); 641 static void set_signature(oop constructor, oop value); 642 643 static bool has_annotations_field(); 644 static oop annotations(oop constructor); 645 static void set_annotations(oop constructor, oop value); 646 647 static bool has_parameter_annotations_field(); 648 static oop parameter_annotations(oop method); 649 static void set_parameter_annotations(oop method, oop value); 650 651 static bool has_type_annotations_field(); 652 static oop type_annotations(oop constructor); 653 static void set_type_annotations(oop constructor, oop value); 654 655 // Debugging 656 friend class JavaClasses; 657 }; 658 659 660 // Interface to java.lang.reflect.Field objects 661 662 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 663 private: 664 // Note that to reduce dependencies on the JDK we compute these 665 // offsets at run-time. 666 static int clazz_offset; 667 static int name_offset; 668 static int type_offset; 669 static int slot_offset; 670 static int modifiers_offset; 671 static int signature_offset; 672 static int annotations_offset; 673 static int type_annotations_offset; 674 675 static void compute_offsets(); 676 677 public: 678 // Allocation 679 static Handle create(TRAPS); 680 681 // Accessors 682 static oop clazz(oop reflect); 683 static void set_clazz(oop reflect, oop value); 684 685 static oop name(oop field); 686 static void set_name(oop field, oop value); 687 688 static oop type(oop field); 689 static void set_type(oop field, oop value); 690 691 static int slot(oop reflect); 692 static void set_slot(oop reflect, int value); 693 694 static int modifiers(oop field); 695 static void set_modifiers(oop field, int value); 696 697 static bool has_signature_field(); 698 static oop signature(oop constructor); 699 static void set_signature(oop constructor, oop value); 700 701 static bool has_annotations_field(); 702 static oop annotations(oop constructor); 703 static void set_annotations(oop constructor, oop value); 704 705 static bool has_parameter_annotations_field(); 706 static oop parameter_annotations(oop method); 707 static void set_parameter_annotations(oop method, oop value); 708 709 static bool has_annotation_default_field(); 710 static oop annotation_default(oop method); 711 static void set_annotation_default(oop method, oop value); 712 713 static bool has_type_annotations_field(); 714 static oop type_annotations(oop field); 715 static void set_type_annotations(oop field, oop value); 716 717 // Debugging 718 friend class JavaClasses; 719 }; 720 721 class java_lang_reflect_Parameter { 722 private: 723 // Note that to reduce dependencies on the JDK we compute these 724 // offsets at run-time. 725 static int name_offset; 726 static int modifiers_offset; 727 static int index_offset; 728 static int executable_offset; 729 730 static void compute_offsets(); 731 732 public: 733 // Allocation 734 static Handle create(TRAPS); 735 736 // Accessors 737 static oop name(oop field); 738 static void set_name(oop field, oop value); 739 740 static int index(oop reflect); 741 static void set_index(oop reflect, int value); 742 743 static int modifiers(oop reflect); 744 static void set_modifiers(oop reflect, int value); 745 746 static oop executable(oop constructor); 747 static void set_executable(oop constructor, oop value); 748 749 friend class JavaClasses; 750 }; 751 752 #define MODULE_INJECTED_FIELDS(macro) \ 753 macro(java_lang_Module, module_entry, intptr_signature, false) 754 755 class java_lang_Module { 756 private: 757 static int loader_offset; 758 static int name_offset; 759 static int _module_entry_offset; 760 static void compute_offsets(); 761 762 public: 763 // Allocation 764 static Handle create(Handle loader, Handle module_name, TRAPS); 765 766 // Testers 767 static bool is_instance(oop obj); 768 769 // Accessors 770 static oop loader(oop module); 771 static void set_loader(oop module, oop value); 772 773 static oop name(oop module); 774 static void set_name(oop module, oop value); 775 776 static ModuleEntry* module_entry(oop module, TRAPS); 777 static void set_module_entry(oop module, ModuleEntry* module_entry); 778 779 friend class JavaClasses; 780 }; 781 782 // Interface to jdk.internal.reflect.ConstantPool objects 783 class reflect_ConstantPool { 784 private: 785 // Note that to reduce dependencies on the JDK we compute these 786 // offsets at run-time. 787 static int _oop_offset; 788 789 static void compute_offsets(); 790 791 public: 792 // Allocation 793 static Handle create(TRAPS); 794 795 // Accessors 796 static void set_cp(oop reflect, ConstantPool* value); 797 static int oop_offset() { 798 return _oop_offset; 799 } 800 801 static ConstantPool* get_cp(oop reflect); 802 803 // Debugging 804 friend class JavaClasses; 805 }; 806 807 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 808 class reflect_UnsafeStaticFieldAccessorImpl { 809 private: 810 static int _base_offset; 811 static void compute_offsets(); 812 813 public: 814 static int base_offset() { 815 return _base_offset; 816 } 817 818 // Debugging 819 friend class JavaClasses; 820 }; 821 822 // Interface to java.lang primitive type boxing objects: 823 // - java.lang.Boolean 824 // - java.lang.Character 825 // - java.lang.Float 826 // - java.lang.Double 827 // - java.lang.Byte 828 // - java.lang.Short 829 // - java.lang.Integer 830 // - java.lang.Long 831 832 // This could be separated out into 8 individual classes. 833 834 class java_lang_boxing_object: AllStatic { 835 private: 836 enum { 837 hc_value_offset = 0 838 }; 839 static int value_offset; 840 static int long_value_offset; 841 842 static oop initialize_and_allocate(BasicType type, TRAPS); 843 public: 844 // Allocation. Returns a boxed value, or NULL for invalid type. 845 static oop create(BasicType type, jvalue* value, TRAPS); 846 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 847 static BasicType get_value(oop box, jvalue* value); 848 static BasicType set_value(oop box, jvalue* value); 849 static BasicType basic_type(oop box); 850 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 851 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 852 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 853 static void print(BasicType type, jvalue* value, outputStream* st); 854 855 static int value_offset_in_bytes(BasicType type) { 856 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 857 value_offset; 858 } 859 860 // Debugging 861 friend class JavaClasses; 862 }; 863 864 865 866 // Interface to java.lang.ref.Reference objects 867 868 class java_lang_ref_Reference: AllStatic { 869 public: 870 enum { 871 hc_referent_offset = 0, 872 hc_queue_offset = 1, 873 hc_next_offset = 2, 874 hc_discovered_offset = 3 // Is not last, see SoftRefs. 875 }; 876 877 static int referent_offset; 878 static int queue_offset; 879 static int next_offset; 880 static int discovered_offset; 881 static int number_of_fake_oop_fields; 882 883 // Accessors 884 static inline oop referent(oop ref); 885 static inline void set_referent(oop ref, oop value); 886 static inline void set_referent_raw(oop ref, oop value); 887 static inline HeapWord* referent_addr(oop ref); 888 static inline oop next(oop ref); 889 static inline void set_next(oop ref, oop value); 890 static inline void set_next_raw(oop ref, oop value); 891 static inline HeapWord* next_addr(oop ref); 892 static inline oop discovered(oop ref); 893 static inline void set_discovered(oop ref, oop value); 894 static inline void set_discovered_raw(oop ref, oop value); 895 static inline HeapWord* discovered_addr(oop ref); 896 }; 897 898 899 // Interface to java.lang.ref.SoftReference objects 900 901 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 902 public: 903 enum { 904 // The timestamp is a long field and may need to be adjusted for alignment. 905 hc_timestamp_offset = hc_discovered_offset + 1 906 }; 907 enum { 908 hc_static_clock_offset = 0 909 }; 910 911 static int timestamp_offset; 912 static int static_clock_offset; 913 914 // Accessors 915 static jlong timestamp(oop ref); 916 917 // Accessors for statics 918 static jlong clock(); 919 static void set_clock(jlong value); 920 }; 921 922 // Interface to java.lang.invoke.MethodHandle objects 923 924 class MethodHandleEntry; 925 926 class java_lang_invoke_MethodHandle: AllStatic { 927 friend class JavaClasses; 928 929 private: 930 static int _type_offset; // the MethodType of this MH 931 static int _form_offset; // the LambdaForm of this MH 932 933 static void compute_offsets(); 934 935 public: 936 // Accessors 937 static oop type(oop mh); 938 static void set_type(oop mh, oop mtype); 939 940 static oop form(oop mh); 941 static void set_form(oop mh, oop lform); 942 943 // Testers 944 static bool is_subclass(Klass* klass) { 945 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 946 } 947 static bool is_instance(oop obj); 948 949 // Accessors for code generation: 950 static int type_offset_in_bytes() { return _type_offset; } 951 static int form_offset_in_bytes() { return _form_offset; } 952 }; 953 954 // Interface to java.lang.invoke.DirectMethodHandle objects 955 956 class java_lang_invoke_DirectMethodHandle: AllStatic { 957 friend class JavaClasses; 958 959 private: 960 static int _member_offset; // the MemberName of this DMH 961 962 static void compute_offsets(); 963 964 public: 965 // Accessors 966 static oop member(oop mh); 967 968 // Testers 969 static bool is_subclass(Klass* klass) { 970 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 971 } 972 static bool is_instance(oop obj); 973 974 // Accessors for code generation: 975 static int member_offset_in_bytes() { return _member_offset; } 976 }; 977 978 // Interface to java.lang.invoke.LambdaForm objects 979 // (These are a private interface for managing adapter code generation.) 980 981 class java_lang_invoke_LambdaForm: AllStatic { 982 friend class JavaClasses; 983 984 private: 985 static int _vmentry_offset; // type is MemberName 986 987 static void compute_offsets(); 988 989 public: 990 // Accessors 991 static oop vmentry(oop lform); 992 static void set_vmentry(oop lform, oop invoker); 993 994 // Testers 995 static bool is_subclass(Klass* klass) { 996 return SystemDictionary::LambdaForm_klass() != NULL && 997 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 998 } 999 static bool is_instance(oop obj); 1000 1001 // Accessors for code generation: 1002 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1003 }; 1004 1005 1006 // Interface to java.lang.invoke.MemberName objects 1007 // (These are a private interface for Java code to query the class hierarchy.) 1008 1009 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1010 macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \ 1011 macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false) 1012 1013 class java_lang_invoke_ResolvedMethodName : AllStatic { 1014 friend class JavaClasses; 1015 1016 static int _vmtarget_offset; 1017 static int _vmholder_offset; 1018 1019 static void compute_offsets(); 1020 public: 1021 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1022 1023 static Method* vmtarget(oop resolved_method); 1024 static void set_vmtarget(oop resolved_method, Method* method); 1025 1026 // find or create resolved member name 1027 static oop find_resolved_method(const methodHandle& m, TRAPS); 1028 1029 static bool is_instance(oop resolved_method); 1030 }; 1031 1032 1033 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1034 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) 1035 1036 1037 class java_lang_invoke_MemberName: AllStatic { 1038 friend class JavaClasses; 1039 1040 private: 1041 // From java.lang.invoke.MemberName: 1042 // private Class<?> clazz; // class in which the method is defined 1043 // private String name; // may be null if not yet materialized 1044 // private Object type; // may be null if not yet materialized 1045 // private int flags; // modifier bits; see reflect.Modifier 1046 // private ResolvedMethodName method; // holds VM-specific target value 1047 // private intptr_t vmindex; // member index within class or interface 1048 static int _clazz_offset; 1049 static int _name_offset; 1050 static int _type_offset; 1051 static int _flags_offset; 1052 static int _method_offset; 1053 static int _vmindex_offset; 1054 1055 static void compute_offsets(); 1056 1057 public: 1058 // Accessors 1059 static oop clazz(oop mname); 1060 static void set_clazz(oop mname, oop clazz); 1061 1062 static oop type(oop mname); 1063 static void set_type(oop mname, oop type); 1064 1065 static oop name(oop mname); 1066 static void set_name(oop mname, oop name); 1067 1068 static int flags(oop mname); 1069 static void set_flags(oop mname, int flags); 1070 1071 // Link through ResolvedMethodName field to get Method* 1072 static Method* vmtarget(oop mname); 1073 static void set_method(oop mname, oop method); 1074 1075 static intptr_t vmindex(oop mname); 1076 static void set_vmindex(oop mname, intptr_t index); 1077 1078 // Testers 1079 static bool is_subclass(Klass* klass) { 1080 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1081 } 1082 static bool is_instance(oop obj); 1083 1084 static bool is_method(oop obj); 1085 1086 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1087 enum { 1088 MN_IS_METHOD = 0x00010000, // method (not constructor) 1089 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1090 MN_IS_FIELD = 0x00040000, // field 1091 MN_IS_TYPE = 0x00080000, // nested type 1092 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1093 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1094 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1095 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1096 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1097 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1098 }; 1099 1100 // Accessors for code generation: 1101 static int clazz_offset_in_bytes() { return _clazz_offset; } 1102 static int type_offset_in_bytes() { return _type_offset; } 1103 static int name_offset_in_bytes() { return _name_offset; } 1104 static int flags_offset_in_bytes() { return _flags_offset; } 1105 static int method_offset_in_bytes() { return _method_offset; } 1106 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1107 }; 1108 1109 1110 // Interface to java.lang.invoke.MethodType objects 1111 1112 class java_lang_invoke_MethodType: AllStatic { 1113 friend class JavaClasses; 1114 1115 private: 1116 static int _rtype_offset; 1117 static int _ptypes_offset; 1118 1119 static void compute_offsets(); 1120 1121 public: 1122 // Accessors 1123 static oop rtype(oop mt); 1124 static objArrayOop ptypes(oop mt); 1125 1126 static oop ptype(oop mt, int index); 1127 static int ptype_count(oop mt); 1128 1129 static int ptype_slot_count(oop mt); // extra counts for long/double 1130 static int rtype_slot_count(oop mt); // extra counts for long/double 1131 1132 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1133 static void print_signature(oop mt, outputStream* st); 1134 1135 static bool is_instance(oop obj); 1136 1137 static bool equals(oop mt1, oop mt2); 1138 1139 // Accessors for code generation: 1140 static int rtype_offset_in_bytes() { return _rtype_offset; } 1141 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1142 }; 1143 1144 1145 // Interface to java.lang.invoke.CallSite objects 1146 1147 class java_lang_invoke_CallSite: AllStatic { 1148 friend class JavaClasses; 1149 1150 private: 1151 static int _target_offset; 1152 static int _context_offset; 1153 1154 static void compute_offsets(); 1155 1156 public: 1157 // Accessors 1158 static oop target( oop site); 1159 static void set_target( oop site, oop target); 1160 static void set_target_volatile( oop site, oop target); 1161 1162 static oop context(oop site); 1163 1164 // Testers 1165 static bool is_subclass(Klass* klass) { 1166 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1167 } 1168 static bool is_instance(oop obj); 1169 1170 // Accessors for code generation: 1171 static int target_offset_in_bytes() { return _target_offset; } 1172 }; 1173 1174 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1175 1176 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1177 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1178 1179 class DependencyContext; 1180 1181 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1182 friend class JavaClasses; 1183 1184 private: 1185 static int _vmdependencies_offset; 1186 1187 static void compute_offsets(); 1188 1189 public: 1190 // Accessors 1191 static DependencyContext vmdependencies(oop context); 1192 1193 // Testers 1194 static bool is_subclass(Klass* klass) { 1195 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1196 } 1197 static bool is_instance(oop obj); 1198 }; 1199 1200 // Interface to java.security.AccessControlContext objects 1201 1202 class java_security_AccessControlContext: AllStatic { 1203 private: 1204 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1205 // so we compute the offsets at startup rather than hard-wiring them. 1206 static int _context_offset; 1207 static int _privilegedContext_offset; 1208 static int _isPrivileged_offset; 1209 static int _isAuthorized_offset; 1210 1211 static void compute_offsets(); 1212 public: 1213 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1214 1215 static bool is_authorized(Handle context); 1216 1217 // Debugging/initialization 1218 friend class JavaClasses; 1219 }; 1220 1221 1222 // Interface to java.lang.ClassLoader objects 1223 1224 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1225 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1226 1227 class java_lang_ClassLoader : AllStatic { 1228 private: 1229 // The fake offsets are added by the class loader when java.lang.Class is loaded 1230 enum { 1231 hc_parent_offset = 0 1232 }; 1233 static int _loader_data_offset; 1234 static bool offsets_computed; 1235 static int parent_offset; 1236 static int parallelCapable_offset; 1237 static int name_offset; 1238 static int unnamedModule_offset; 1239 1240 public: 1241 static void compute_offsets(); 1242 1243 static ClassLoaderData** loader_data_addr(oop loader); 1244 static ClassLoaderData* loader_data(oop loader); 1245 1246 static oop parent(oop loader); 1247 static oop name(oop loader); 1248 static bool isAncestor(oop loader, oop cl); 1249 1250 // Support for parallelCapable field 1251 static bool parallelCapable(oop the_class_mirror); 1252 1253 static bool is_trusted_loader(oop loader); 1254 1255 // Return true if this is one of the class loaders associated with 1256 // the generated bytecodes for reflection. 1257 static bool is_reflection_class_loader(oop loader); 1258 1259 // Fix for 4474172 1260 static oop non_reflection_class_loader(oop loader); 1261 1262 // Testers 1263 static bool is_subclass(Klass* klass) { 1264 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1265 } 1266 static bool is_instance(oop obj); 1267 1268 static oop unnamedModule(oop loader); 1269 1270 // Debugging 1271 friend class JavaClasses; 1272 friend class ClassFileParser; // access to number_of_fake_fields 1273 }; 1274 1275 1276 // Interface to java.lang.System objects 1277 1278 class java_lang_System : AllStatic { 1279 private: 1280 enum { 1281 hc_static_in_offset = 0, 1282 hc_static_out_offset = 1, 1283 hc_static_err_offset = 2, 1284 hc_static_security_offset = 3 1285 }; 1286 1287 static int static_in_offset; 1288 static int static_out_offset; 1289 static int static_err_offset; 1290 static int static_security_offset; 1291 1292 public: 1293 static int in_offset_in_bytes(); 1294 static int out_offset_in_bytes(); 1295 static int err_offset_in_bytes(); 1296 1297 static bool has_security_manager(); 1298 1299 // Debugging 1300 friend class JavaClasses; 1301 }; 1302 1303 1304 // Interface to java.lang.StackTraceElement objects 1305 1306 class java_lang_StackTraceElement: AllStatic { 1307 private: 1308 enum { 1309 hc_declaringClassObject_offset = 0, 1310 hc_classLoaderName_offset = 1, 1311 hc_moduleName_offset = 2, 1312 hc_moduleVersion_offset = 3, 1313 hc_declaringClass_offset = 4, 1314 hc_methodName_offset = 5, 1315 hc_fileName_offset = 6, 1316 hc_lineNumber_offset = 7 1317 }; 1318 1319 static int declaringClassObject_offset; 1320 static int classLoaderName_offset; 1321 static int moduleName_offset; 1322 static int moduleVersion_offset; 1323 static int declaringClass_offset; 1324 static int methodName_offset; 1325 static int fileName_offset; 1326 static int lineNumber_offset; 1327 1328 // Setters 1329 static void set_classLoaderName(oop element, oop value); 1330 static void set_moduleName(oop element, oop value); 1331 static void set_moduleVersion(oop element, oop value); 1332 static void set_declaringClass(oop element, oop value); 1333 static void set_methodName(oop element, oop value); 1334 static void set_fileName(oop element, oop value); 1335 static void set_lineNumber(oop element, int value); 1336 static void set_declaringClassObject(oop element, oop value); 1337 1338 public: 1339 // Create an instance of StackTraceElement 1340 static oop create(const methodHandle& method, int bci, TRAPS); 1341 1342 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1343 int version, int bci, Symbol* name, TRAPS); 1344 1345 // Debugging 1346 friend class JavaClasses; 1347 }; 1348 1349 1350 class Backtrace: AllStatic { 1351 public: 1352 // Helper backtrace functions to store bci|version together. 1353 static int merge_bci_and_version(int bci, int version); 1354 static int merge_mid_and_cpref(int mid, int cpref); 1355 static int bci_at(unsigned int merged); 1356 static int version_at(unsigned int merged); 1357 static int mid_at(unsigned int merged); 1358 static int cpref_at(unsigned int merged); 1359 static int get_line_number(const methodHandle& method, int bci); 1360 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1361 1362 // Debugging 1363 friend class JavaClasses; 1364 }; 1365 1366 // Interface to java.lang.StackFrameInfo objects 1367 1368 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1369 macro(java_lang_StackFrameInfo, version, short_signature, false) 1370 1371 class java_lang_StackFrameInfo: AllStatic { 1372 private: 1373 static int _memberName_offset; 1374 static int _bci_offset; 1375 static int _version_offset; 1376 1377 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1378 1379 public: 1380 // Setters 1381 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS); 1382 static void set_bci(oop info, int value); 1383 1384 static void set_version(oop info, short value); 1385 1386 static void compute_offsets(); 1387 1388 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1389 1390 // Debugging 1391 friend class JavaClasses; 1392 }; 1393 1394 class java_lang_LiveStackFrameInfo: AllStatic { 1395 private: 1396 static int _monitors_offset; 1397 static int _locals_offset; 1398 static int _operands_offset; 1399 static int _mode_offset; 1400 1401 public: 1402 static void set_monitors(oop info, oop value); 1403 static void set_locals(oop info, oop value); 1404 static void set_operands(oop info, oop value); 1405 static void set_mode(oop info, int value); 1406 1407 static void compute_offsets(); 1408 1409 // Debugging 1410 friend class JavaClasses; 1411 }; 1412 1413 // Interface to java.lang.AssertionStatusDirectives objects 1414 1415 class java_lang_AssertionStatusDirectives: AllStatic { 1416 private: 1417 enum { 1418 hc_classes_offset, 1419 hc_classEnabled_offset, 1420 hc_packages_offset, 1421 hc_packageEnabled_offset, 1422 hc_deflt_offset 1423 }; 1424 1425 static int classes_offset; 1426 static int classEnabled_offset; 1427 static int packages_offset; 1428 static int packageEnabled_offset; 1429 static int deflt_offset; 1430 1431 public: 1432 // Setters 1433 static void set_classes(oop obj, oop val); 1434 static void set_classEnabled(oop obj, oop val); 1435 static void set_packages(oop obj, oop val); 1436 static void set_packageEnabled(oop obj, oop val); 1437 static void set_deflt(oop obj, bool val); 1438 // Debugging 1439 friend class JavaClasses; 1440 }; 1441 1442 1443 class java_nio_Buffer: AllStatic { 1444 private: 1445 static int _limit_offset; 1446 1447 public: 1448 static int limit_offset(); 1449 static void compute_offsets(); 1450 }; 1451 1452 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1453 private: 1454 static int _owner_offset; 1455 public: 1456 static void initialize(TRAPS); 1457 static oop get_owner_threadObj(oop obj); 1458 }; 1459 1460 // Use to declare fields that need to be injected into Java classes 1461 // for the JVM to use. The name_index and signature_index are 1462 // declared in vmSymbols. The may_be_java flag is used to declare 1463 // fields that might already exist in Java but should be injected if 1464 // they don't. Otherwise the field is unconditionally injected and 1465 // the JVM uses the injected one. This is to ensure that name 1466 // collisions don't occur. In general may_be_java should be false 1467 // unless there's a good reason. 1468 1469 class InjectedField { 1470 public: 1471 const SystemDictionary::WKID klass_id; 1472 const vmSymbols::SID name_index; 1473 const vmSymbols::SID signature_index; 1474 const bool may_be_java; 1475 1476 1477 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1478 Symbol* name() const { return lookup_symbol(name_index); } 1479 Symbol* signature() const { return lookup_symbol(signature_index); } 1480 1481 int compute_offset(); 1482 1483 // Find the Symbol for this index 1484 static Symbol* lookup_symbol(int symbol_index) { 1485 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1486 } 1487 }; 1488 1489 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1490 klass##_##name##_enum, 1491 1492 #define ALL_INJECTED_FIELDS(macro) \ 1493 CLASS_INJECTED_FIELDS(macro) \ 1494 CLASSLOADER_INJECTED_FIELDS(macro) \ 1495 RESOLVEDMETHOD_INJECTED_FIELDS(macro) \ 1496 MEMBERNAME_INJECTED_FIELDS(macro) \ 1497 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1498 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1499 MODULE_INJECTED_FIELDS(macro) 1500 1501 // Interface to hard-coded offset checking 1502 1503 class JavaClasses : AllStatic { 1504 private: 1505 1506 static InjectedField _injected_fields[]; 1507 1508 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1509 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1510 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1511 1512 public: 1513 enum InjectedFieldID { 1514 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1515 MAX_enum 1516 }; 1517 1518 static int compute_injected_offset(InjectedFieldID id); 1519 1520 static void compute_hard_coded_offsets(); 1521 static void compute_offsets(); 1522 static void check_offsets() PRODUCT_RETURN; 1523 1524 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1525 }; 1526 1527 #undef DECLARE_INJECTED_FIELD_ENUM 1528 1529 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP