1 /* 2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP 26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP 27 28 #include "classfile/systemDictionary.hpp" 29 #include "jvmtifiles/jvmti.h" 30 #include "oops/oop.hpp" 31 #include "runtime/os.hpp" 32 #include "utilities/utf8.hpp" 33 34 // Interface for manipulating the basic Java classes. 35 // 36 // All dependencies on layout of actual Java classes should be kept here. 37 // If the layout of any of the classes above changes the offsets must be adjusted. 38 // 39 // For most classes we hardwire the offsets for performance reasons. In certain 40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at 41 // startup since the layout here differs between JDK1.2 and JDK1.3. 42 // 43 // Note that fields (static and non-static) are arranged with oops before non-oops 44 // on a per class basis. The offsets below have to reflect this ordering. 45 // 46 // When editing the layouts please update the check_offset verification code 47 // correspondingly. The names in the enums must be identical to the actual field 48 // names in order for the verification code to work. 49 50 51 // Interface to java.lang.String objects 52 53 class java_lang_String : AllStatic { 54 private: 55 static int value_offset; 56 static int hash_offset; 57 static int coder_offset; 58 59 static bool initialized; 60 61 static Handle basic_create(int length, bool byte_arr, TRAPS); 62 63 static inline void set_coder(oop string, jbyte coder); 64 65 public: 66 67 // Coders 68 enum Coder { 69 CODER_LATIN1 = 0, 70 CODER_UTF16 = 1 71 }; 72 73 static void compute_offsets(); 74 75 // Instance creation 76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 77 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 78 static Handle create_from_str(const char* utf8_str, TRAPS); 79 static oop create_oop_from_str(const char* utf8_str, TRAPS); 80 static Handle create_from_symbol(Symbol* symbol, TRAPS); 81 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 82 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 83 84 static bool has_hash_field() { 85 assert(initialized, "Must be initialized"); 86 return (hash_offset > 0); 87 } 88 static bool has_coder_field() { 89 assert(initialized, "Must be initialized"); 90 return (coder_offset > 0); 91 } 92 93 static void set_compact_strings(bool value); 94 95 static int value_offset_in_bytes() { 96 assert(initialized && (value_offset > 0), "Must be initialized"); 97 return value_offset; 98 } 99 static int hash_offset_in_bytes() { 100 assert(initialized && (hash_offset > 0), "Must be initialized"); 101 return hash_offset; 102 } 103 static int coder_offset_in_bytes() { 104 assert(initialized && (coder_offset > 0), "Must be initialized"); 105 return coder_offset; 106 } 107 108 static inline void set_value_raw(oop string, typeArrayOop buffer); 109 static inline void set_value(oop string, typeArrayOop buffer); 110 static inline void set_hash(oop string, unsigned int hash); 111 112 // Accessors 113 static inline typeArrayOop value(oop java_string); 114 static inline unsigned int hash(oop java_string); 115 static inline bool is_latin1(oop java_string); 116 static inline int length(oop java_string); 117 static int utf8_length(oop java_string); 118 119 // String converters 120 static char* as_utf8_string(oop java_string); 121 static char* as_utf8_string(oop java_string, char* buf, int buflen); 122 static char* as_utf8_string(oop java_string, int start, int len); 123 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 124 static char* as_platform_dependent_str(Handle java_string, TRAPS); 125 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 126 // produce an ascii string with all other values quoted using \u#### 127 static char* as_quoted_ascii(oop java_string); 128 129 // Compute the hash value for a java.lang.String object which would 130 // contain the characters passed in. 131 // 132 // As the hash value used by the String object itself, in 133 // String.hashCode(). This value is normally calculated in Java code 134 // in the String.hashCode method(), but is precomputed for String 135 // objects in the shared archive file. 136 // hash P(31) from Kernighan & Ritchie 137 // 138 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 139 static unsigned int hash_code(const jchar* s, int len) { 140 unsigned int h = 0; 141 while (len-- > 0) { 142 h = 31*h + (unsigned int) *s; 143 s++; 144 } 145 return h; 146 } 147 148 static unsigned int hash_code(const jbyte* s, int len) { 149 unsigned int h = 0; 150 while (len-- > 0) { 151 h = 31*h + (((unsigned int) *s) & 0xFF); 152 s++; 153 } 154 return h; 155 } 156 157 static unsigned int hash_code(oop java_string); 158 159 static bool equals(oop java_string, jchar* chars, int len); 160 static bool equals(oop str1, oop str2); 161 162 // Conversion between '.' and '/' formats 163 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 164 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 165 166 // Conversion 167 static Symbol* as_symbol(Handle java_string, TRAPS); 168 static Symbol* as_symbol_or_null(oop java_string); 169 170 // Testers 171 static bool is_instance(oop obj); 172 static inline bool is_instance_inlined(oop obj); 173 174 // Debugging 175 static void print(oop java_string, outputStream* st); 176 friend class JavaClasses; 177 friend class StringTable; 178 }; 179 180 181 // Interface to java.lang.Class objects 182 183 #define CLASS_INJECTED_FIELDS(macro) \ 184 macro(java_lang_Class, klass, intptr_signature, false) \ 185 macro(java_lang_Class, array_klass, intptr_signature, false) \ 186 macro(java_lang_Class, oop_size, int_signature, false) \ 187 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 188 macro(java_lang_Class, protection_domain, object_signature, false) \ 189 macro(java_lang_Class, signers, object_signature, false) 190 191 class java_lang_Class : AllStatic { 192 friend class VMStructs; 193 friend class JVMCIVMStructs; 194 195 private: 196 // The fake offsets are added by the class loader when java.lang.Class is loaded 197 198 static int _klass_offset; 199 static int _array_klass_offset; 200 201 static int _oop_size_offset; 202 static int _static_oop_field_count_offset; 203 204 static int _protection_domain_offset; 205 static int _init_lock_offset; 206 static int _signers_offset; 207 static int _class_loader_offset; 208 static int _module_offset; 209 static int _component_mirror_offset; 210 211 static bool offsets_computed; 212 static int classRedefinedCount_offset; 213 214 static GrowableArray<Klass*>* _fixup_mirror_list; 215 static GrowableArray<Klass*>* _fixup_module_field_list; 216 217 static void set_init_lock(oop java_class, oop init_lock); 218 static void set_protection_domain(oop java_class, oop protection_domain); 219 static void set_class_loader(oop java_class, oop class_loader); 220 static void set_component_mirror(oop java_class, oop comp_mirror); 221 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS); 222 public: 223 static void compute_offsets(); 224 225 // Instance creation 226 static void create_mirror(KlassHandle k, Handle class_loader, Handle module, 227 Handle protection_domain, TRAPS); 228 static void fixup_mirror(KlassHandle k, TRAPS); 229 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 230 231 static void fixup_module_field(KlassHandle k, Handle module); 232 233 // Conversion 234 static Klass* as_Klass(oop java_class); 235 static void set_klass(oop java_class, Klass* klass); 236 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 237 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 238 Klass* refk_oop = NULL; 239 BasicType result = as_BasicType(java_class, &refk_oop); 240 (*reference_klass) = KlassHandle(refk_oop); 241 return result; 242 } 243 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 244 static void print_signature(oop java_class, outputStream *st); 245 static const char* as_external_name(oop java_class); 246 // Testing 247 static bool is_instance(oop obj); 248 249 static bool is_primitive(oop java_class); 250 static BasicType primitive_type(oop java_class); 251 static oop primitive_mirror(BasicType t); 252 // JVM_NewArray support 253 static Klass* array_klass(oop java_class); 254 static void set_array_klass(oop java_class, Klass* klass); 255 // compiler support for class operations 256 static int klass_offset_in_bytes() { return _klass_offset; } 257 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 258 // Support for classRedefinedCount field 259 static int classRedefinedCount(oop the_class_mirror); 260 static void set_classRedefinedCount(oop the_class_mirror, int value); 261 262 // Support for embedded per-class oops 263 static oop protection_domain(oop java_class); 264 static oop init_lock(oop java_class); 265 static oop component_mirror(oop java_class); 266 static objArrayOop signers(oop java_class); 267 static void set_signers(oop java_class, objArrayOop signers); 268 269 static oop class_loader(oop java_class); 270 static void set_module(oop java_class, oop module); 271 static oop module(oop java_class); 272 273 static int oop_size(oop java_class); 274 static void set_oop_size(oop java_class, int size); 275 static int static_oop_field_count(oop java_class); 276 static void set_static_oop_field_count(oop java_class, int size); 277 278 static GrowableArray<Klass*>* fixup_mirror_list() { 279 return _fixup_mirror_list; 280 } 281 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 282 _fixup_mirror_list = v; 283 } 284 285 static GrowableArray<Klass*>* fixup_module_field_list() { 286 return _fixup_module_field_list; 287 } 288 static void set_fixup_module_field_list(GrowableArray<Klass*>* v) { 289 _fixup_module_field_list = v; 290 } 291 292 // Debugging 293 friend class JavaClasses; 294 friend class InstanceKlass; // verification code accesses offsets 295 friend class ClassFileParser; // access to number_of_fake_fields 296 }; 297 298 // Interface to java.lang.Thread objects 299 300 class java_lang_Thread : AllStatic { 301 private: 302 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 303 // so we compute the offsets at startup rather than hard-wiring them. 304 static int _name_offset; 305 static int _group_offset; 306 static int _contextClassLoader_offset; 307 static int _inheritedAccessControlContext_offset; 308 static int _priority_offset; 309 static int _eetop_offset; 310 static int _daemon_offset; 311 static int _stillborn_offset; 312 static int _stackSize_offset; 313 static int _tid_offset; 314 static int _thread_status_offset; 315 static int _park_blocker_offset; 316 static int _park_event_offset ; 317 318 static void compute_offsets(); 319 320 public: 321 // Instance creation 322 static oop create(); 323 // Returns the JavaThread associated with the thread obj 324 static JavaThread* thread(oop java_thread); 325 // Set JavaThread for instance 326 static void set_thread(oop java_thread, JavaThread* thread); 327 // Name 328 static oop name(oop java_thread); 329 static void set_name(oop java_thread, oop name); 330 // Priority 331 static ThreadPriority priority(oop java_thread); 332 static void set_priority(oop java_thread, ThreadPriority priority); 333 // Thread group 334 static oop threadGroup(oop java_thread); 335 // Stillborn 336 static bool is_stillborn(oop java_thread); 337 static void set_stillborn(oop java_thread); 338 // Alive (NOTE: this is not really a field, but provides the correct 339 // definition without doing a Java call) 340 static bool is_alive(oop java_thread); 341 // Daemon 342 static bool is_daemon(oop java_thread); 343 static void set_daemon(oop java_thread); 344 // Context ClassLoader 345 static oop context_class_loader(oop java_thread); 346 // Control context 347 static oop inherited_access_control_context(oop java_thread); 348 // Stack size hint 349 static jlong stackSize(oop java_thread); 350 // Thread ID 351 static jlong thread_id(oop java_thread); 352 353 // Blocker object responsible for thread parking 354 static oop park_blocker(oop java_thread); 355 356 // Pointer to type-stable park handler, encoded as jlong. 357 // Should be set when apparently null 358 // For details, see unsafe.cpp Unsafe_Unpark 359 static jlong park_event(oop java_thread); 360 static bool set_park_event(oop java_thread, jlong ptr); 361 362 // Java Thread Status for JVMTI and M&M use. 363 // This thread status info is saved in threadStatus field of 364 // java.lang.Thread java class. 365 enum ThreadStatus { 366 NEW = 0, 367 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 368 JVMTI_THREAD_STATE_RUNNABLE, 369 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 370 JVMTI_THREAD_STATE_WAITING + 371 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 372 JVMTI_THREAD_STATE_SLEEPING, 373 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 374 JVMTI_THREAD_STATE_WAITING + 375 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 376 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 377 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 378 JVMTI_THREAD_STATE_WAITING + 379 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 380 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 381 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 382 JVMTI_THREAD_STATE_WAITING + 383 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 384 JVMTI_THREAD_STATE_PARKED, 385 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 386 JVMTI_THREAD_STATE_WAITING + 387 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 388 JVMTI_THREAD_STATE_PARKED, 389 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 390 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 391 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 392 }; 393 // Write thread status info to threadStatus field of java.lang.Thread. 394 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 395 // Read thread status info from threadStatus field of java.lang.Thread. 396 static ThreadStatus get_thread_status(oop java_thread_oop); 397 398 static const char* thread_status_name(oop java_thread_oop); 399 400 // Debugging 401 friend class JavaClasses; 402 }; 403 404 // Interface to java.lang.ThreadGroup objects 405 406 class java_lang_ThreadGroup : AllStatic { 407 private: 408 static int _parent_offset; 409 static int _name_offset; 410 static int _threads_offset; 411 static int _groups_offset; 412 static int _maxPriority_offset; 413 static int _destroyed_offset; 414 static int _daemon_offset; 415 static int _nthreads_offset; 416 static int _ngroups_offset; 417 418 static void compute_offsets(); 419 420 public: 421 // parent ThreadGroup 422 static oop parent(oop java_thread_group); 423 // name 424 static const char* name(oop java_thread_group); 425 // ("name as oop" accessor is not necessary) 426 // Number of threads in group 427 static int nthreads(oop java_thread_group); 428 // threads 429 static objArrayOop threads(oop java_thread_group); 430 // Number of threads in group 431 static int ngroups(oop java_thread_group); 432 // groups 433 static objArrayOop groups(oop java_thread_group); 434 // maxPriority in group 435 static ThreadPriority maxPriority(oop java_thread_group); 436 // Destroyed 437 static bool is_destroyed(oop java_thread_group); 438 // Daemon 439 static bool is_daemon(oop java_thread_group); 440 // Debugging 441 friend class JavaClasses; 442 }; 443 444 445 446 // Interface to java.lang.Throwable objects 447 448 class java_lang_Throwable: AllStatic { 449 friend class BacktraceBuilder; 450 friend class BacktraceIterator; 451 452 private: 453 // Offsets 454 enum { 455 hc_backtrace_offset = 0, 456 hc_detailMessage_offset = 1, 457 hc_cause_offset = 2, // New since 1.4 458 hc_stackTrace_offset = 3 // New since 1.4 459 }; 460 enum { 461 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 462 }; 463 // Trace constants 464 enum { 465 trace_methods_offset = 0, 466 trace_bcis_offset = 1, 467 trace_mirrors_offset = 2, 468 trace_cprefs_offset = 3, 469 trace_next_offset = 4, 470 trace_size = 5, 471 trace_chunk_size = 32 472 }; 473 474 static int backtrace_offset; 475 static int detailMessage_offset; 476 static int stackTrace_offset; 477 static int depth_offset; 478 static int static_unassigned_stacktrace_offset; 479 480 // StackTrace (programmatic access, new since 1.4) 481 static void clear_stacktrace(oop throwable); 482 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 483 static void set_stacktrace(oop throwable, oop st_element_array); 484 static oop unassigned_stacktrace(); 485 486 public: 487 // Backtrace 488 static oop backtrace(oop throwable); 489 static void set_backtrace(oop throwable, oop value); 490 static int depth(oop throwable); 491 static void set_depth(oop throwable, int value); 492 // Needed by JVMTI to filter out this internal field. 493 static int get_backtrace_offset() { return backtrace_offset;} 494 static int get_detailMessage_offset() { return detailMessage_offset;} 495 // Message 496 static oop message(Handle throwable); 497 static void set_message(oop throwable, oop value); 498 static Symbol* detail_message(oop throwable); 499 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 500 static void print_stack_usage(Handle stream); 501 502 static void compute_offsets(); 503 504 // Allocate space for backtrace (created but stack trace not filled in) 505 static void allocate_backtrace(Handle throwable, TRAPS); 506 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 507 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 508 // Fill in current stack trace, can cause GC 509 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 510 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 511 // Programmatic access to stack trace 512 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 513 // Printing 514 static void print(Handle throwable, outputStream* st); 515 static void print_stack_trace(Handle throwable, outputStream* st); 516 static void java_printStackTrace(Handle throwable, TRAPS); 517 // Debugging 518 friend class JavaClasses; 519 }; 520 521 522 // Interface to java.lang.reflect.AccessibleObject objects 523 524 class java_lang_reflect_AccessibleObject: AllStatic { 525 private: 526 // Note that to reduce dependencies on the JDK we compute these 527 // offsets at run-time. 528 static int override_offset; 529 530 static void compute_offsets(); 531 532 public: 533 // Accessors 534 static jboolean override(oop reflect); 535 static void set_override(oop reflect, jboolean value); 536 537 // Debugging 538 friend class JavaClasses; 539 }; 540 541 542 // Interface to java.lang.reflect.Method objects 543 544 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 545 private: 546 // Note that to reduce dependencies on the JDK we compute these 547 // offsets at run-time. 548 static int clazz_offset; 549 static int name_offset; 550 static int returnType_offset; 551 static int parameterTypes_offset; 552 static int exceptionTypes_offset; 553 static int slot_offset; 554 static int modifiers_offset; 555 static int signature_offset; 556 static int annotations_offset; 557 static int parameter_annotations_offset; 558 static int annotation_default_offset; 559 static int type_annotations_offset; 560 561 static void compute_offsets(); 562 563 public: 564 // Allocation 565 static Handle create(TRAPS); 566 567 // Accessors 568 static oop clazz(oop reflect); 569 static void set_clazz(oop reflect, oop value); 570 571 static oop name(oop method); 572 static void set_name(oop method, oop value); 573 574 static oop return_type(oop method); 575 static void set_return_type(oop method, oop value); 576 577 static oop parameter_types(oop method); 578 static void set_parameter_types(oop method, oop value); 579 580 static oop exception_types(oop method); 581 static void set_exception_types(oop method, oop value); 582 583 static int slot(oop reflect); 584 static void set_slot(oop reflect, int value); 585 586 static int modifiers(oop method); 587 static void set_modifiers(oop method, int value); 588 589 static bool has_signature_field(); 590 static oop signature(oop method); 591 static void set_signature(oop method, oop value); 592 593 static bool has_annotations_field(); 594 static oop annotations(oop method); 595 static void set_annotations(oop method, oop value); 596 597 static bool has_parameter_annotations_field(); 598 static oop parameter_annotations(oop method); 599 static void set_parameter_annotations(oop method, oop value); 600 601 static bool has_annotation_default_field(); 602 static oop annotation_default(oop method); 603 static void set_annotation_default(oop method, oop value); 604 605 static bool has_type_annotations_field(); 606 static oop type_annotations(oop method); 607 static void set_type_annotations(oop method, oop value); 608 609 // Debugging 610 friend class JavaClasses; 611 }; 612 613 614 // Interface to java.lang.reflect.Constructor objects 615 616 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 617 private: 618 // Note that to reduce dependencies on the JDK we compute these 619 // offsets at run-time. 620 static int clazz_offset; 621 static int parameterTypes_offset; 622 static int exceptionTypes_offset; 623 static int slot_offset; 624 static int modifiers_offset; 625 static int signature_offset; 626 static int annotations_offset; 627 static int parameter_annotations_offset; 628 static int type_annotations_offset; 629 630 static void compute_offsets(); 631 632 public: 633 // Allocation 634 static Handle create(TRAPS); 635 636 // Accessors 637 static oop clazz(oop reflect); 638 static void set_clazz(oop reflect, oop value); 639 640 static oop parameter_types(oop constructor); 641 static void set_parameter_types(oop constructor, oop value); 642 643 static oop exception_types(oop constructor); 644 static void set_exception_types(oop constructor, oop value); 645 646 static int slot(oop reflect); 647 static void set_slot(oop reflect, int value); 648 649 static int modifiers(oop constructor); 650 static void set_modifiers(oop constructor, int value); 651 652 static bool has_signature_field(); 653 static oop signature(oop constructor); 654 static void set_signature(oop constructor, oop value); 655 656 static bool has_annotations_field(); 657 static oop annotations(oop constructor); 658 static void set_annotations(oop constructor, oop value); 659 660 static bool has_parameter_annotations_field(); 661 static oop parameter_annotations(oop method); 662 static void set_parameter_annotations(oop method, oop value); 663 664 static bool has_type_annotations_field(); 665 static oop type_annotations(oop constructor); 666 static void set_type_annotations(oop constructor, oop value); 667 668 // Debugging 669 friend class JavaClasses; 670 }; 671 672 673 // Interface to java.lang.reflect.Field objects 674 675 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 676 private: 677 // Note that to reduce dependencies on the JDK we compute these 678 // offsets at run-time. 679 static int clazz_offset; 680 static int name_offset; 681 static int type_offset; 682 static int slot_offset; 683 static int modifiers_offset; 684 static int signature_offset; 685 static int annotations_offset; 686 static int type_annotations_offset; 687 688 static void compute_offsets(); 689 690 public: 691 // Allocation 692 static Handle create(TRAPS); 693 694 // Accessors 695 static oop clazz(oop reflect); 696 static void set_clazz(oop reflect, oop value); 697 698 static oop name(oop field); 699 static void set_name(oop field, oop value); 700 701 static oop type(oop field); 702 static void set_type(oop field, oop value); 703 704 static int slot(oop reflect); 705 static void set_slot(oop reflect, int value); 706 707 static int modifiers(oop field); 708 static void set_modifiers(oop field, int value); 709 710 static bool has_signature_field(); 711 static oop signature(oop constructor); 712 static void set_signature(oop constructor, oop value); 713 714 static bool has_annotations_field(); 715 static oop annotations(oop constructor); 716 static void set_annotations(oop constructor, oop value); 717 718 static bool has_parameter_annotations_field(); 719 static oop parameter_annotations(oop method); 720 static void set_parameter_annotations(oop method, oop value); 721 722 static bool has_annotation_default_field(); 723 static oop annotation_default(oop method); 724 static void set_annotation_default(oop method, oop value); 725 726 static bool has_type_annotations_field(); 727 static oop type_annotations(oop field); 728 static void set_type_annotations(oop field, oop value); 729 730 // Debugging 731 friend class JavaClasses; 732 }; 733 734 class java_lang_reflect_Parameter { 735 private: 736 // Note that to reduce dependencies on the JDK we compute these 737 // offsets at run-time. 738 static int name_offset; 739 static int modifiers_offset; 740 static int index_offset; 741 static int executable_offset; 742 743 static void compute_offsets(); 744 745 public: 746 // Allocation 747 static Handle create(TRAPS); 748 749 // Accessors 750 static oop name(oop field); 751 static void set_name(oop field, oop value); 752 753 static int index(oop reflect); 754 static void set_index(oop reflect, int value); 755 756 static int modifiers(oop reflect); 757 static void set_modifiers(oop reflect, int value); 758 759 static oop executable(oop constructor); 760 static void set_executable(oop constructor, oop value); 761 762 friend class JavaClasses; 763 }; 764 765 #define MODULE_INJECTED_FIELDS(macro) \ 766 macro(java_lang_reflect_Module, module_entry, intptr_signature, false) 767 768 class java_lang_reflect_Module { 769 private: 770 static int loader_offset; 771 static int name_offset; 772 static int _module_entry_offset; 773 static void compute_offsets(); 774 775 public: 776 // Allocation 777 static Handle create(Handle loader, Handle module_name, TRAPS); 778 779 // Testers 780 static bool is_instance(oop obj); 781 782 // Accessors 783 static oop loader(oop module); 784 static void set_loader(oop module, oop value); 785 786 static oop name(oop module); 787 static void set_name(oop module, oop value); 788 789 static ModuleEntry* module_entry(oop module, TRAPS); 790 static void set_module_entry(oop module, ModuleEntry* module_entry); 791 792 friend class JavaClasses; 793 }; 794 795 // Interface to jdk.internal.reflect.ConstantPool objects 796 class reflect_ConstantPool { 797 private: 798 // Note that to reduce dependencies on the JDK we compute these 799 // offsets at run-time. 800 static int _oop_offset; 801 802 static void compute_offsets(); 803 804 public: 805 // Allocation 806 static Handle create(TRAPS); 807 808 // Accessors 809 static void set_cp(oop reflect, ConstantPool* value); 810 static int oop_offset() { 811 return _oop_offset; 812 } 813 814 static ConstantPool* get_cp(oop reflect); 815 816 // Debugging 817 friend class JavaClasses; 818 }; 819 820 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 821 class reflect_UnsafeStaticFieldAccessorImpl { 822 private: 823 static int _base_offset; 824 static void compute_offsets(); 825 826 public: 827 static int base_offset() { 828 return _base_offset; 829 } 830 831 // Debugging 832 friend class JavaClasses; 833 }; 834 835 // Interface to java.lang primitive type boxing objects: 836 // - java.lang.Boolean 837 // - java.lang.Character 838 // - java.lang.Float 839 // - java.lang.Double 840 // - java.lang.Byte 841 // - java.lang.Short 842 // - java.lang.Integer 843 // - java.lang.Long 844 845 // This could be separated out into 8 individual classes. 846 847 class java_lang_boxing_object: AllStatic { 848 private: 849 enum { 850 hc_value_offset = 0 851 }; 852 static int value_offset; 853 static int long_value_offset; 854 855 static oop initialize_and_allocate(BasicType type, TRAPS); 856 public: 857 // Allocation. Returns a boxed value, or NULL for invalid type. 858 static oop create(BasicType type, jvalue* value, TRAPS); 859 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 860 static BasicType get_value(oop box, jvalue* value); 861 static BasicType set_value(oop box, jvalue* value); 862 static BasicType basic_type(oop box); 863 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 864 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 865 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 866 static void print(BasicType type, jvalue* value, outputStream* st); 867 868 static int value_offset_in_bytes(BasicType type) { 869 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 870 value_offset; 871 } 872 873 // Debugging 874 friend class JavaClasses; 875 }; 876 877 878 879 // Interface to java.lang.ref.Reference objects 880 881 class java_lang_ref_Reference: AllStatic { 882 public: 883 enum { 884 hc_referent_offset = 0, 885 hc_queue_offset = 1, 886 hc_next_offset = 2, 887 hc_discovered_offset = 3 // Is not last, see SoftRefs. 888 }; 889 enum { 890 hc_static_lock_offset = 0, 891 hc_static_pending_offset = 1 892 }; 893 894 static int referent_offset; 895 static int queue_offset; 896 static int next_offset; 897 static int discovered_offset; 898 static int static_lock_offset; 899 static int static_pending_offset; 900 static int number_of_fake_oop_fields; 901 902 // Accessors 903 static inline oop referent(oop ref); 904 static inline void set_referent(oop ref, oop value); 905 static inline void set_referent_raw(oop ref, oop value); 906 static inline HeapWord* referent_addr(oop ref); 907 static inline oop next(oop ref); 908 static inline void set_next(oop ref, oop value); 909 static inline void set_next_raw(oop ref, oop value); 910 static inline HeapWord* next_addr(oop ref); 911 static inline oop discovered(oop ref); 912 static inline void set_discovered(oop ref, oop value); 913 static inline void set_discovered_raw(oop ref, oop value); 914 static inline HeapWord* discovered_addr(oop ref); 915 916 // Accessors for statics 917 static oop pending_list_lock(); 918 static oop pending_list(); 919 920 static HeapWord* pending_list_lock_addr(); 921 static HeapWord* pending_list_addr(); 922 }; 923 924 925 // Interface to java.lang.ref.SoftReference objects 926 927 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 928 public: 929 enum { 930 // The timestamp is a long field and may need to be adjusted for alignment. 931 hc_timestamp_offset = hc_discovered_offset + 1 932 }; 933 enum { 934 hc_static_clock_offset = 0 935 }; 936 937 static int timestamp_offset; 938 static int static_clock_offset; 939 940 // Accessors 941 static jlong timestamp(oop ref); 942 943 // Accessors for statics 944 static jlong clock(); 945 static void set_clock(jlong value); 946 }; 947 948 // Interface to java.lang.invoke.MethodHandle objects 949 950 class MethodHandleEntry; 951 952 class java_lang_invoke_MethodHandle: AllStatic { 953 friend class JavaClasses; 954 955 private: 956 static int _type_offset; // the MethodType of this MH 957 static int _form_offset; // the LambdaForm of this MH 958 959 static void compute_offsets(); 960 961 public: 962 // Accessors 963 static oop type(oop mh); 964 static void set_type(oop mh, oop mtype); 965 966 static oop form(oop mh); 967 static void set_form(oop mh, oop lform); 968 969 // Testers 970 static bool is_subclass(Klass* klass) { 971 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 972 } 973 static bool is_instance(oop obj); 974 975 // Accessors for code generation: 976 static int type_offset_in_bytes() { return _type_offset; } 977 static int form_offset_in_bytes() { return _form_offset; } 978 }; 979 980 // Interface to java.lang.invoke.DirectMethodHandle objects 981 982 class java_lang_invoke_DirectMethodHandle: AllStatic { 983 friend class JavaClasses; 984 985 private: 986 static int _member_offset; // the MemberName of this DMH 987 988 static void compute_offsets(); 989 990 public: 991 // Accessors 992 static oop member(oop mh); 993 994 // Testers 995 static bool is_subclass(Klass* klass) { 996 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 997 } 998 static bool is_instance(oop obj); 999 1000 // Accessors for code generation: 1001 static int member_offset_in_bytes() { return _member_offset; } 1002 }; 1003 1004 // Interface to java.lang.invoke.LambdaForm objects 1005 // (These are a private interface for managing adapter code generation.) 1006 1007 class java_lang_invoke_LambdaForm: AllStatic { 1008 friend class JavaClasses; 1009 1010 private: 1011 static int _vmentry_offset; // type is MemberName 1012 1013 static void compute_offsets(); 1014 1015 public: 1016 // Accessors 1017 static oop vmentry(oop lform); 1018 static void set_vmentry(oop lform, oop invoker); 1019 1020 // Testers 1021 static bool is_subclass(Klass* klass) { 1022 return SystemDictionary::LambdaForm_klass() != NULL && 1023 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1024 } 1025 static bool is_instance(oop obj); 1026 1027 // Accessors for code generation: 1028 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1029 }; 1030 1031 1032 // Interface to java.lang.invoke.MemberName objects 1033 // (These are a private interface for Java code to query the class hierarchy.) 1034 1035 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1036 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1037 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1038 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 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 intptr vmtarget; // 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 _vmtarget_offset; 1056 static int _vmloader_offset; 1057 static int _vmindex_offset; 1058 1059 static void compute_offsets(); 1060 1061 public: 1062 // Accessors 1063 static oop clazz(oop mname); 1064 static void set_clazz(oop mname, oop clazz); 1065 1066 static oop type(oop mname); 1067 static void set_type(oop mname, oop type); 1068 1069 static oop name(oop mname); 1070 static void set_name(oop mname, oop name); 1071 1072 static int flags(oop mname); 1073 static void set_flags(oop mname, int flags); 1074 1075 static Metadata* vmtarget(oop mname); 1076 static void set_vmtarget(oop mname, Metadata* target); 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 vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1109 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1110 1111 static bool equals(oop mt1, oop mt2); 1112 }; 1113 1114 1115 // Interface to java.lang.invoke.MethodType objects 1116 1117 class java_lang_invoke_MethodType: AllStatic { 1118 friend class JavaClasses; 1119 1120 private: 1121 static int _rtype_offset; 1122 static int _ptypes_offset; 1123 1124 static void compute_offsets(); 1125 1126 public: 1127 // Accessors 1128 static oop rtype(oop mt); 1129 static objArrayOop ptypes(oop mt); 1130 1131 static oop ptype(oop mt, int index); 1132 static int ptype_count(oop mt); 1133 1134 static int ptype_slot_count(oop mt); // extra counts for long/double 1135 static int rtype_slot_count(oop mt); // extra counts for long/double 1136 1137 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1138 static void print_signature(oop mt, outputStream* st); 1139 1140 static bool is_instance(oop obj); 1141 1142 static bool equals(oop mt1, oop mt2); 1143 1144 // Accessors for code generation: 1145 static int rtype_offset_in_bytes() { return _rtype_offset; } 1146 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1147 }; 1148 1149 1150 // Interface to java.lang.invoke.CallSite objects 1151 1152 class java_lang_invoke_CallSite: AllStatic { 1153 friend class JavaClasses; 1154 1155 private: 1156 static int _target_offset; 1157 static int _context_offset; 1158 1159 static void compute_offsets(); 1160 1161 public: 1162 // Accessors 1163 static oop target( oop site); 1164 static void set_target( oop site, oop target); 1165 static void set_target_volatile( oop site, oop target); 1166 1167 static oop context(oop site); 1168 1169 // Testers 1170 static bool is_subclass(Klass* klass) { 1171 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1172 } 1173 static bool is_instance(oop obj); 1174 1175 // Accessors for code generation: 1176 static int target_offset_in_bytes() { return _target_offset; } 1177 }; 1178 1179 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1180 1181 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1182 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1183 1184 class DependencyContext; 1185 1186 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1187 friend class JavaClasses; 1188 1189 private: 1190 static int _vmdependencies_offset; 1191 1192 static void compute_offsets(); 1193 1194 public: 1195 // Accessors 1196 static DependencyContext vmdependencies(oop context); 1197 1198 // Testers 1199 static bool is_subclass(Klass* klass) { 1200 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1201 } 1202 static bool is_instance(oop obj); 1203 }; 1204 1205 // Interface to java.security.AccessControlContext objects 1206 1207 class java_security_AccessControlContext: AllStatic { 1208 private: 1209 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1210 // so we compute the offsets at startup rather than hard-wiring them. 1211 static int _context_offset; 1212 static int _privilegedContext_offset; 1213 static int _isPrivileged_offset; 1214 static int _isAuthorized_offset; 1215 1216 static void compute_offsets(); 1217 public: 1218 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1219 1220 static bool is_authorized(Handle context); 1221 1222 // Debugging/initialization 1223 friend class JavaClasses; 1224 }; 1225 1226 1227 // Interface to java.lang.ClassLoader objects 1228 1229 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1230 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1231 1232 class java_lang_ClassLoader : AllStatic { 1233 private: 1234 // The fake offsets are added by the class loader when java.lang.Class is loaded 1235 enum { 1236 hc_parent_offset = 0 1237 }; 1238 static int _loader_data_offset; 1239 static bool offsets_computed; 1240 static int parent_offset; 1241 static int parallelCapable_offset; 1242 static int unnamedModule_offset; 1243 1244 public: 1245 static void compute_offsets(); 1246 1247 static ClassLoaderData** loader_data_addr(oop loader); 1248 static ClassLoaderData* loader_data(oop loader); 1249 1250 static oop parent(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 // Fix for 4474172 1259 static oop non_reflection_class_loader(oop loader); 1260 1261 // Testers 1262 static bool is_subclass(Klass* klass) { 1263 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1264 } 1265 static bool is_instance(oop obj); 1266 1267 static oop unnamedModule(oop loader); 1268 1269 // Debugging 1270 friend class JavaClasses; 1271 friend class ClassFileParser; // access to number_of_fake_fields 1272 }; 1273 1274 1275 // Interface to java.lang.System objects 1276 1277 class java_lang_System : AllStatic { 1278 private: 1279 enum { 1280 hc_static_in_offset = 0, 1281 hc_static_out_offset = 1, 1282 hc_static_err_offset = 2, 1283 hc_static_security_offset = 3 1284 }; 1285 1286 static int static_in_offset; 1287 static int static_out_offset; 1288 static int static_err_offset; 1289 static int static_security_offset; 1290 1291 public: 1292 static int in_offset_in_bytes(); 1293 static int out_offset_in_bytes(); 1294 static int err_offset_in_bytes(); 1295 1296 static bool has_security_manager(); 1297 1298 // Debugging 1299 friend class JavaClasses; 1300 }; 1301 1302 1303 // Interface to java.lang.StackTraceElement objects 1304 1305 class java_lang_StackTraceElement: AllStatic { 1306 private: 1307 enum { 1308 hc_moduleName_offset = 0, 1309 hc_moduleVersion_offset = 1, 1310 hc_declaringClass_offset = 2, 1311 hc_methodName_offset = 3, 1312 hc_fileName_offset = 4, 1313 hc_lineNumber_offset = 5 1314 }; 1315 1316 static int moduleName_offset; 1317 static int moduleVersion_offset; 1318 static int declaringClass_offset; 1319 static int methodName_offset; 1320 static int fileName_offset; 1321 static int lineNumber_offset; 1322 1323 // Setters 1324 static void set_moduleName(oop element, oop value); 1325 static void set_moduleVersion(oop element, oop value); 1326 static void set_declaringClass(oop element, oop value); 1327 static void set_methodName(oop element, oop value); 1328 static void set_fileName(oop element, oop value); 1329 static void set_lineNumber(oop element, int value); 1330 1331 public: 1332 // Create an instance of StackTraceElement 1333 static oop create(const methodHandle& method, int bci, TRAPS); 1334 1335 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1336 int version, int bci, int cpref, TRAPS); 1337 1338 // Debugging 1339 friend class JavaClasses; 1340 }; 1341 1342 1343 class Backtrace: AllStatic { 1344 public: 1345 // Helper backtrace functions to store bci|version together. 1346 static int merge_bci_and_version(int bci, int version); 1347 static int merge_mid_and_cpref(int mid, int cpref); 1348 static int bci_at(unsigned int merged); 1349 static int version_at(unsigned int merged); 1350 static int mid_at(unsigned int merged); 1351 static int cpref_at(unsigned int merged); 1352 static int get_line_number(const methodHandle& method, int bci); 1353 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1354 1355 // Debugging 1356 friend class JavaClasses; 1357 }; 1358 1359 // Interface to java.lang.StackFrameInfo objects 1360 1361 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1362 macro(java_lang_StackFrameInfo, version, short_signature, false) 1363 1364 class java_lang_StackFrameInfo: AllStatic { 1365 private: 1366 static int _declaringClass_offset; 1367 static int _memberName_offset; 1368 static int _bci_offset; 1369 static int _version_offset; 1370 1371 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1372 1373 public: 1374 // Setters 1375 static void set_declaringClass(oop info, oop value); 1376 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci); 1377 static void set_bci(oop info, int value); 1378 1379 static void set_version(oop info, short value); 1380 1381 static void compute_offsets(); 1382 1383 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1384 1385 // Debugging 1386 friend class JavaClasses; 1387 }; 1388 1389 class java_lang_LiveStackFrameInfo: AllStatic { 1390 private: 1391 static int _monitors_offset; 1392 static int _locals_offset; 1393 static int _operands_offset; 1394 1395 public: 1396 static void set_monitors(oop info, oop value); 1397 static void set_locals(oop info, oop value); 1398 static void set_operands(oop info, oop value); 1399 1400 static void compute_offsets(); 1401 1402 // Debugging 1403 friend class JavaClasses; 1404 }; 1405 1406 // Interface to java.lang.AssertionStatusDirectives objects 1407 1408 class java_lang_AssertionStatusDirectives: AllStatic { 1409 private: 1410 enum { 1411 hc_classes_offset, 1412 hc_classEnabled_offset, 1413 hc_packages_offset, 1414 hc_packageEnabled_offset, 1415 hc_deflt_offset 1416 }; 1417 1418 static int classes_offset; 1419 static int classEnabled_offset; 1420 static int packages_offset; 1421 static int packageEnabled_offset; 1422 static int deflt_offset; 1423 1424 public: 1425 // Setters 1426 static void set_classes(oop obj, oop val); 1427 static void set_classEnabled(oop obj, oop val); 1428 static void set_packages(oop obj, oop val); 1429 static void set_packageEnabled(oop obj, oop val); 1430 static void set_deflt(oop obj, bool val); 1431 // Debugging 1432 friend class JavaClasses; 1433 }; 1434 1435 1436 class java_nio_Buffer: AllStatic { 1437 private: 1438 static int _limit_offset; 1439 1440 public: 1441 static int limit_offset(); 1442 static void compute_offsets(); 1443 }; 1444 1445 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1446 private: 1447 static int _owner_offset; 1448 public: 1449 static void initialize(TRAPS); 1450 static oop get_owner_threadObj(oop obj); 1451 }; 1452 1453 // Use to declare fields that need to be injected into Java classes 1454 // for the JVM to use. The name_index and signature_index are 1455 // declared in vmSymbols. The may_be_java flag is used to declare 1456 // fields that might already exist in Java but should be injected if 1457 // they don't. Otherwise the field is unconditionally injected and 1458 // the JVM uses the injected one. This is to ensure that name 1459 // collisions don't occur. In general may_be_java should be false 1460 // unless there's a good reason. 1461 1462 class InjectedField { 1463 public: 1464 const SystemDictionary::WKID klass_id; 1465 const vmSymbols::SID name_index; 1466 const vmSymbols::SID signature_index; 1467 const bool may_be_java; 1468 1469 1470 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1471 Symbol* name() const { return lookup_symbol(name_index); } 1472 Symbol* signature() const { return lookup_symbol(signature_index); } 1473 1474 int compute_offset(); 1475 1476 // Find the Symbol for this index 1477 static Symbol* lookup_symbol(int symbol_index) { 1478 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1479 } 1480 }; 1481 1482 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1483 klass##_##name##_enum, 1484 1485 #define ALL_INJECTED_FIELDS(macro) \ 1486 CLASS_INJECTED_FIELDS(macro) \ 1487 CLASSLOADER_INJECTED_FIELDS(macro) \ 1488 MEMBERNAME_INJECTED_FIELDS(macro) \ 1489 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1490 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1491 MODULE_INJECTED_FIELDS(macro) 1492 1493 // Interface to hard-coded offset checking 1494 1495 class JavaClasses : AllStatic { 1496 private: 1497 1498 static InjectedField _injected_fields[]; 1499 1500 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1501 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1502 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1503 1504 public: 1505 enum InjectedFieldID { 1506 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1507 MAX_enum 1508 }; 1509 1510 static int compute_injected_offset(InjectedFieldID id); 1511 1512 static void compute_hard_coded_offsets(); 1513 static void compute_offsets(); 1514 static void check_offsets() PRODUCT_RETURN; 1515 1516 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1517 }; 1518 1519 #undef DECLARE_INJECTED_FIELD_ENUM 1520 1521 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP