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