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 int oop_size_offset() { return _oop_size_offset; } 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 _vmAllowSuspension_offset; 416 static int _nthreads_offset; 417 static int _ngroups_offset; 418 419 static void compute_offsets(); 420 421 public: 422 // parent ThreadGroup 423 static oop parent(oop java_thread_group); 424 // name 425 static const char* name(oop java_thread_group); 426 // ("name as oop" accessor is not necessary) 427 // Number of threads in group 428 static int nthreads(oop java_thread_group); 429 // threads 430 static objArrayOop threads(oop java_thread_group); 431 // Number of threads in group 432 static int ngroups(oop java_thread_group); 433 // groups 434 static objArrayOop groups(oop java_thread_group); 435 // maxPriority in group 436 static ThreadPriority maxPriority(oop java_thread_group); 437 // Destroyed 438 static bool is_destroyed(oop java_thread_group); 439 // Daemon 440 static bool is_daemon(oop java_thread_group); 441 // vmAllowSuspension 442 static bool is_vmAllowSuspension(oop java_thread_group); 443 // Debugging 444 friend class JavaClasses; 445 }; 446 447 448 449 // Interface to java.lang.Throwable objects 450 451 class java_lang_Throwable: AllStatic { 452 friend class BacktraceBuilder; 453 friend class BacktraceIterator; 454 455 private: 456 // Offsets 457 enum { 458 hc_backtrace_offset = 0, 459 hc_detailMessage_offset = 1, 460 hc_cause_offset = 2, // New since 1.4 461 hc_stackTrace_offset = 3 // New since 1.4 462 }; 463 enum { 464 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 465 }; 466 // Trace constants 467 enum { 468 trace_methods_offset = 0, 469 trace_bcis_offset = 1, 470 trace_mirrors_offset = 2, 471 trace_cprefs_offset = 3, 472 trace_next_offset = 4, 473 trace_size = 5, 474 trace_chunk_size = 32 475 }; 476 477 static int backtrace_offset; 478 static int detailMessage_offset; 479 static int stackTrace_offset; 480 static int depth_offset; 481 static int static_unassigned_stacktrace_offset; 482 483 // StackTrace (programmatic access, new since 1.4) 484 static void clear_stacktrace(oop throwable); 485 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 486 static void set_stacktrace(oop throwable, oop st_element_array); 487 static oop unassigned_stacktrace(); 488 489 public: 490 // Backtrace 491 static oop backtrace(oop throwable); 492 static void set_backtrace(oop throwable, oop value); 493 static int depth(oop throwable); 494 static void set_depth(oop throwable, int value); 495 // Needed by JVMTI to filter out this internal field. 496 static int get_backtrace_offset() { return backtrace_offset;} 497 static int get_detailMessage_offset() { return detailMessage_offset;} 498 // Message 499 static oop message(Handle throwable); 500 static void set_message(oop throwable, oop value); 501 static Symbol* detail_message(oop throwable); 502 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 503 static void print_stack_usage(Handle stream); 504 505 static void compute_offsets(); 506 507 // Allocate space for backtrace (created but stack trace not filled in) 508 static void allocate_backtrace(Handle throwable, TRAPS); 509 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 510 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 511 // Fill in current stack trace, can cause GC 512 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 513 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 514 // Programmatic access to stack trace 515 static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS); 516 // Printing 517 static void print(Handle throwable, outputStream* st); 518 static void print_stack_trace(Handle throwable, outputStream* st); 519 static void java_printStackTrace(Handle throwable, TRAPS); 520 // Debugging 521 friend class JavaClasses; 522 }; 523 524 525 // Interface to java.lang.reflect.AccessibleObject objects 526 527 class java_lang_reflect_AccessibleObject: AllStatic { 528 private: 529 // Note that to reduce dependencies on the JDK we compute these 530 // offsets at run-time. 531 static int override_offset; 532 533 static void compute_offsets(); 534 535 public: 536 // Accessors 537 static jboolean override(oop reflect); 538 static void set_override(oop reflect, jboolean value); 539 540 // Debugging 541 friend class JavaClasses; 542 }; 543 544 545 // Interface to java.lang.reflect.Method objects 546 547 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 548 private: 549 // Note that to reduce dependencies on the JDK we compute these 550 // offsets at run-time. 551 static int clazz_offset; 552 static int name_offset; 553 static int returnType_offset; 554 static int parameterTypes_offset; 555 static int exceptionTypes_offset; 556 static int slot_offset; 557 static int modifiers_offset; 558 static int signature_offset; 559 static int annotations_offset; 560 static int parameter_annotations_offset; 561 static int annotation_default_offset; 562 static int type_annotations_offset; 563 564 static void compute_offsets(); 565 566 public: 567 // Allocation 568 static Handle create(TRAPS); 569 570 // Accessors 571 static oop clazz(oop reflect); 572 static void set_clazz(oop reflect, oop value); 573 574 static oop name(oop method); 575 static void set_name(oop method, oop value); 576 577 static oop return_type(oop method); 578 static void set_return_type(oop method, oop value); 579 580 static oop parameter_types(oop method); 581 static void set_parameter_types(oop method, oop value); 582 583 static oop exception_types(oop method); 584 static void set_exception_types(oop method, oop value); 585 586 static int slot(oop reflect); 587 static void set_slot(oop reflect, int value); 588 589 static int modifiers(oop method); 590 static void set_modifiers(oop method, int value); 591 592 static bool has_signature_field(); 593 static oop signature(oop method); 594 static void set_signature(oop method, oop value); 595 596 static bool has_annotations_field(); 597 static oop annotations(oop method); 598 static void set_annotations(oop method, oop value); 599 600 static bool has_parameter_annotations_field(); 601 static oop parameter_annotations(oop method); 602 static void set_parameter_annotations(oop method, oop value); 603 604 static bool has_annotation_default_field(); 605 static oop annotation_default(oop method); 606 static void set_annotation_default(oop method, oop value); 607 608 static bool has_type_annotations_field(); 609 static oop type_annotations(oop method); 610 static void set_type_annotations(oop method, oop value); 611 612 // Debugging 613 friend class JavaClasses; 614 }; 615 616 617 // Interface to java.lang.reflect.Constructor objects 618 619 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 620 private: 621 // Note that to reduce dependencies on the JDK we compute these 622 // offsets at run-time. 623 static int clazz_offset; 624 static int parameterTypes_offset; 625 static int exceptionTypes_offset; 626 static int slot_offset; 627 static int modifiers_offset; 628 static int signature_offset; 629 static int annotations_offset; 630 static int parameter_annotations_offset; 631 static int type_annotations_offset; 632 633 static void compute_offsets(); 634 635 public: 636 // Allocation 637 static Handle create(TRAPS); 638 639 // Accessors 640 static oop clazz(oop reflect); 641 static void set_clazz(oop reflect, oop value); 642 643 static oop parameter_types(oop constructor); 644 static void set_parameter_types(oop constructor, oop value); 645 646 static oop exception_types(oop constructor); 647 static void set_exception_types(oop constructor, oop value); 648 649 static int slot(oop reflect); 650 static void set_slot(oop reflect, int value); 651 652 static int modifiers(oop constructor); 653 static void set_modifiers(oop constructor, int value); 654 655 static bool has_signature_field(); 656 static oop signature(oop constructor); 657 static void set_signature(oop constructor, oop value); 658 659 static bool has_annotations_field(); 660 static oop annotations(oop constructor); 661 static void set_annotations(oop constructor, oop value); 662 663 static bool has_parameter_annotations_field(); 664 static oop parameter_annotations(oop method); 665 static void set_parameter_annotations(oop method, oop value); 666 667 static bool has_type_annotations_field(); 668 static oop type_annotations(oop constructor); 669 static void set_type_annotations(oop constructor, oop value); 670 671 // Debugging 672 friend class JavaClasses; 673 }; 674 675 676 // Interface to java.lang.reflect.Field objects 677 678 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 679 private: 680 // Note that to reduce dependencies on the JDK we compute these 681 // offsets at run-time. 682 static int clazz_offset; 683 static int name_offset; 684 static int type_offset; 685 static int slot_offset; 686 static int modifiers_offset; 687 static int signature_offset; 688 static int annotations_offset; 689 static int type_annotations_offset; 690 691 static void compute_offsets(); 692 693 public: 694 // Allocation 695 static Handle create(TRAPS); 696 697 // Accessors 698 static oop clazz(oop reflect); 699 static void set_clazz(oop reflect, oop value); 700 701 static oop name(oop field); 702 static void set_name(oop field, oop value); 703 704 static oop type(oop field); 705 static void set_type(oop field, oop value); 706 707 static int slot(oop reflect); 708 static void set_slot(oop reflect, int value); 709 710 static int modifiers(oop field); 711 static void set_modifiers(oop field, int value); 712 713 static bool has_signature_field(); 714 static oop signature(oop constructor); 715 static void set_signature(oop constructor, oop value); 716 717 static bool has_annotations_field(); 718 static oop annotations(oop constructor); 719 static void set_annotations(oop constructor, oop value); 720 721 static bool has_parameter_annotations_field(); 722 static oop parameter_annotations(oop method); 723 static void set_parameter_annotations(oop method, oop value); 724 725 static bool has_annotation_default_field(); 726 static oop annotation_default(oop method); 727 static void set_annotation_default(oop method, oop value); 728 729 static bool has_type_annotations_field(); 730 static oop type_annotations(oop field); 731 static void set_type_annotations(oop field, oop value); 732 733 // Debugging 734 friend class JavaClasses; 735 }; 736 737 class java_lang_reflect_Parameter { 738 private: 739 // Note that to reduce dependencies on the JDK we compute these 740 // offsets at run-time. 741 static int name_offset; 742 static int modifiers_offset; 743 static int index_offset; 744 static int executable_offset; 745 746 static void compute_offsets(); 747 748 public: 749 // Allocation 750 static Handle create(TRAPS); 751 752 // Accessors 753 static oop name(oop field); 754 static void set_name(oop field, oop value); 755 756 static int index(oop reflect); 757 static void set_index(oop reflect, int value); 758 759 static int modifiers(oop reflect); 760 static void set_modifiers(oop reflect, int value); 761 762 static oop executable(oop constructor); 763 static void set_executable(oop constructor, oop value); 764 765 friend class JavaClasses; 766 }; 767 768 #define MODULE_INJECTED_FIELDS(macro) \ 769 macro(java_lang_reflect_Module, module_entry, intptr_signature, false) 770 771 class java_lang_reflect_Module { 772 private: 773 static int loader_offset; 774 static int name_offset; 775 static int _module_entry_offset; 776 static void compute_offsets(); 777 778 public: 779 // Allocation 780 static Handle create(Handle loader, Handle module_name, TRAPS); 781 782 // Testers 783 static bool is_subclass(Klass* klass) { 784 return klass->is_subclass_of(SystemDictionary::reflect_Module_klass()); 785 } 786 static bool is_instance(oop obj); 787 788 // Accessors 789 static oop loader(oop module); 790 static void set_loader(oop module, oop value); 791 792 static oop name(oop module); 793 static void set_name(oop module, oop value); 794 795 static ModuleEntry* module_entry(oop module, TRAPS); 796 static void set_module_entry(oop module, ModuleEntry* module_entry); 797 798 friend class JavaClasses; 799 }; 800 801 // Interface to jdk.internal.reflect.ConstantPool objects 802 class reflect_ConstantPool { 803 private: 804 // Note that to reduce dependencies on the JDK we compute these 805 // offsets at run-time. 806 static int _oop_offset; 807 808 static void compute_offsets(); 809 810 public: 811 // Allocation 812 static Handle create(TRAPS); 813 814 // Accessors 815 static void set_cp(oop reflect, ConstantPool* value); 816 static int oop_offset() { 817 return _oop_offset; 818 } 819 820 static ConstantPool* get_cp(oop reflect); 821 822 // Debugging 823 friend class JavaClasses; 824 }; 825 826 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects 827 class reflect_UnsafeStaticFieldAccessorImpl { 828 private: 829 static int _base_offset; 830 static void compute_offsets(); 831 832 public: 833 static int base_offset() { 834 return _base_offset; 835 } 836 837 // Debugging 838 friend class JavaClasses; 839 }; 840 841 // Interface to java.lang primitive type boxing objects: 842 // - java.lang.Boolean 843 // - java.lang.Character 844 // - java.lang.Float 845 // - java.lang.Double 846 // - java.lang.Byte 847 // - java.lang.Short 848 // - java.lang.Integer 849 // - java.lang.Long 850 851 // This could be separated out into 8 individual classes. 852 853 class java_lang_boxing_object: AllStatic { 854 private: 855 enum { 856 hc_value_offset = 0 857 }; 858 static int value_offset; 859 static int long_value_offset; 860 861 static oop initialize_and_allocate(BasicType type, TRAPS); 862 public: 863 // Allocation. Returns a boxed value, or NULL for invalid type. 864 static oop create(BasicType type, jvalue* value, TRAPS); 865 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 866 static BasicType get_value(oop box, jvalue* value); 867 static BasicType set_value(oop box, jvalue* value); 868 static BasicType basic_type(oop box); 869 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 870 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 871 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 872 static void print(BasicType type, jvalue* value, outputStream* st); 873 874 static int value_offset_in_bytes(BasicType type) { 875 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 876 value_offset; 877 } 878 879 // Debugging 880 friend class JavaClasses; 881 }; 882 883 884 885 // Interface to java.lang.ref.Reference objects 886 887 class java_lang_ref_Reference: AllStatic { 888 public: 889 enum { 890 hc_referent_offset = 0, 891 hc_queue_offset = 1, 892 hc_next_offset = 2, 893 hc_discovered_offset = 3 // Is not last, see SoftRefs. 894 }; 895 enum { 896 hc_static_lock_offset = 0, 897 hc_static_pending_offset = 1 898 }; 899 900 static int referent_offset; 901 static int queue_offset; 902 static int next_offset; 903 static int discovered_offset; 904 static int static_lock_offset; 905 static int static_pending_offset; 906 static int number_of_fake_oop_fields; 907 908 // Accessors 909 static inline oop referent(oop ref); 910 static inline void set_referent(oop ref, oop value); 911 static inline void set_referent_raw(oop ref, oop value); 912 static inline HeapWord* referent_addr(oop ref); 913 static inline oop next(oop ref); 914 static inline void set_next(oop ref, oop value); 915 static inline void set_next_raw(oop ref, oop value); 916 static inline HeapWord* next_addr(oop ref); 917 static inline oop discovered(oop ref); 918 static inline void set_discovered(oop ref, oop value); 919 static inline void set_discovered_raw(oop ref, oop value); 920 static inline HeapWord* discovered_addr(oop ref); 921 922 // Accessors for statics 923 static oop pending_list_lock(); 924 static oop pending_list(); 925 926 static HeapWord* pending_list_lock_addr(); 927 static HeapWord* pending_list_addr(); 928 }; 929 930 931 // Interface to java.lang.ref.SoftReference objects 932 933 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 934 public: 935 enum { 936 // The timestamp is a long field and may need to be adjusted for alignment. 937 hc_timestamp_offset = hc_discovered_offset + 1 938 }; 939 enum { 940 hc_static_clock_offset = 0 941 }; 942 943 static int timestamp_offset; 944 static int static_clock_offset; 945 946 // Accessors 947 static jlong timestamp(oop ref); 948 949 // Accessors for statics 950 static jlong clock(); 951 static void set_clock(jlong value); 952 }; 953 954 // Interface to java.lang.invoke.MethodHandle objects 955 956 class MethodHandleEntry; 957 958 class java_lang_invoke_MethodHandle: AllStatic { 959 friend class JavaClasses; 960 961 private: 962 static int _type_offset; // the MethodType of this MH 963 static int _form_offset; // the LambdaForm of this MH 964 965 static void compute_offsets(); 966 967 public: 968 // Accessors 969 static oop type(oop mh); 970 static void set_type(oop mh, oop mtype); 971 972 static oop form(oop mh); 973 static void set_form(oop mh, oop lform); 974 975 // Testers 976 static bool is_subclass(Klass* klass) { 977 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 978 } 979 static bool is_instance(oop obj); 980 981 // Accessors for code generation: 982 static int type_offset_in_bytes() { return _type_offset; } 983 static int form_offset_in_bytes() { return _form_offset; } 984 }; 985 986 // Interface to java.lang.invoke.DirectMethodHandle objects 987 988 class java_lang_invoke_DirectMethodHandle: AllStatic { 989 friend class JavaClasses; 990 991 private: 992 static int _member_offset; // the MemberName of this DMH 993 994 static void compute_offsets(); 995 996 public: 997 // Accessors 998 static oop member(oop mh); 999 1000 // Testers 1001 static bool is_subclass(Klass* klass) { 1002 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 1003 } 1004 static bool is_instance(oop obj); 1005 1006 // Accessors for code generation: 1007 static int member_offset_in_bytes() { return _member_offset; } 1008 }; 1009 1010 // Interface to java.lang.invoke.LambdaForm objects 1011 // (These are a private interface for managing adapter code generation.) 1012 1013 class java_lang_invoke_LambdaForm: AllStatic { 1014 friend class JavaClasses; 1015 1016 private: 1017 static int _vmentry_offset; // type is MemberName 1018 1019 static void compute_offsets(); 1020 1021 public: 1022 // Accessors 1023 static oop vmentry(oop lform); 1024 static void set_vmentry(oop lform, oop invoker); 1025 1026 // Testers 1027 static bool is_subclass(Klass* klass) { 1028 return SystemDictionary::LambdaForm_klass() != NULL && 1029 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1030 } 1031 static bool is_instance(oop obj); 1032 1033 // Accessors for code generation: 1034 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1035 }; 1036 1037 1038 // Interface to java.lang.invoke.MemberName objects 1039 // (These are a private interface for Java code to query the class hierarchy.) 1040 1041 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1042 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1043 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1044 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1045 1046 class java_lang_invoke_MemberName: AllStatic { 1047 friend class JavaClasses; 1048 1049 private: 1050 // From java.lang.invoke.MemberName: 1051 // private Class<?> clazz; // class in which the method is defined 1052 // private String name; // may be null if not yet materialized 1053 // private Object type; // may be null if not yet materialized 1054 // private int flags; // modifier bits; see reflect.Modifier 1055 // private intptr vmtarget; // VM-specific target value 1056 // private intptr_t vmindex; // member index within class or interface 1057 static int _clazz_offset; 1058 static int _name_offset; 1059 static int _type_offset; 1060 static int _flags_offset; 1061 static int _vmtarget_offset; 1062 static int _vmloader_offset; 1063 static int _vmindex_offset; 1064 1065 static void compute_offsets(); 1066 1067 public: 1068 // Accessors 1069 static oop clazz(oop mname); 1070 static void set_clazz(oop mname, oop clazz); 1071 1072 static oop type(oop mname); 1073 static void set_type(oop mname, oop type); 1074 1075 static oop name(oop mname); 1076 static void set_name(oop mname, oop name); 1077 1078 static int flags(oop mname); 1079 static void set_flags(oop mname, int flags); 1080 1081 static Metadata* vmtarget(oop mname); 1082 static void set_vmtarget(oop mname, Metadata* target); 1083 1084 static intptr_t vmindex(oop mname); 1085 static void set_vmindex(oop mname, intptr_t index); 1086 1087 // Testers 1088 static bool is_subclass(Klass* klass) { 1089 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1090 } 1091 static bool is_instance(oop obj); 1092 1093 static bool is_method(oop obj); 1094 1095 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1096 enum { 1097 MN_IS_METHOD = 0x00010000, // method (not constructor) 1098 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1099 MN_IS_FIELD = 0x00040000, // field 1100 MN_IS_TYPE = 0x00080000, // nested type 1101 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1102 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1103 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1104 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1105 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1106 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1107 }; 1108 1109 // Accessors for code generation: 1110 static int clazz_offset_in_bytes() { return _clazz_offset; } 1111 static int type_offset_in_bytes() { return _type_offset; } 1112 static int name_offset_in_bytes() { return _name_offset; } 1113 static int flags_offset_in_bytes() { return _flags_offset; } 1114 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1115 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1116 1117 static bool equals(oop mt1, oop mt2); 1118 }; 1119 1120 1121 // Interface to java.lang.invoke.MethodType objects 1122 1123 class java_lang_invoke_MethodType: AllStatic { 1124 friend class JavaClasses; 1125 1126 private: 1127 static int _rtype_offset; 1128 static int _ptypes_offset; 1129 1130 static void compute_offsets(); 1131 1132 public: 1133 // Accessors 1134 static oop rtype(oop mt); 1135 static objArrayOop ptypes(oop mt); 1136 1137 static oop ptype(oop mt, int index); 1138 static int ptype_count(oop mt); 1139 1140 static int ptype_slot_count(oop mt); // extra counts for long/double 1141 static int rtype_slot_count(oop mt); // extra counts for long/double 1142 1143 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1144 static void print_signature(oop mt, outputStream* st); 1145 1146 static bool is_instance(oop obj); 1147 1148 static bool equals(oop mt1, oop mt2); 1149 1150 // Accessors for code generation: 1151 static int rtype_offset_in_bytes() { return _rtype_offset; } 1152 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1153 }; 1154 1155 1156 // Interface to java.lang.invoke.CallSite objects 1157 1158 class java_lang_invoke_CallSite: AllStatic { 1159 friend class JavaClasses; 1160 1161 private: 1162 static int _target_offset; 1163 static int _context_offset; 1164 1165 static void compute_offsets(); 1166 1167 public: 1168 // Accessors 1169 static oop target( oop site); 1170 static void set_target( oop site, oop target); 1171 static void set_target_volatile( oop site, oop target); 1172 1173 static oop context(oop site); 1174 1175 // Testers 1176 static bool is_subclass(Klass* klass) { 1177 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1178 } 1179 static bool is_instance(oop obj); 1180 1181 // Accessors for code generation: 1182 static int target_offset_in_bytes() { return _target_offset; } 1183 }; 1184 1185 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1186 1187 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1188 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1189 1190 class DependencyContext; 1191 1192 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1193 friend class JavaClasses; 1194 1195 private: 1196 static int _vmdependencies_offset; 1197 1198 static void compute_offsets(); 1199 1200 public: 1201 // Accessors 1202 static DependencyContext vmdependencies(oop context); 1203 1204 // Testers 1205 static bool is_subclass(Klass* klass) { 1206 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1207 } 1208 static bool is_instance(oop obj); 1209 }; 1210 1211 // Interface to java.security.AccessControlContext objects 1212 1213 class java_security_AccessControlContext: AllStatic { 1214 private: 1215 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1216 // so we compute the offsets at startup rather than hard-wiring them. 1217 static int _context_offset; 1218 static int _privilegedContext_offset; 1219 static int _isPrivileged_offset; 1220 static int _isAuthorized_offset; 1221 1222 static void compute_offsets(); 1223 public: 1224 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1225 1226 static bool is_authorized(Handle context); 1227 1228 // Debugging/initialization 1229 friend class JavaClasses; 1230 }; 1231 1232 1233 // Interface to java.lang.ClassLoader objects 1234 1235 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1236 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1237 1238 class java_lang_ClassLoader : AllStatic { 1239 private: 1240 // The fake offsets are added by the class loader when java.lang.Class is loaded 1241 enum { 1242 hc_parent_offset = 0 1243 }; 1244 static int _loader_data_offset; 1245 static bool offsets_computed; 1246 static int parent_offset; 1247 static int parallelCapable_offset; 1248 static int unnamedModule_offset; 1249 1250 public: 1251 static void compute_offsets(); 1252 1253 static ClassLoaderData** loader_data_addr(oop loader); 1254 static ClassLoaderData* loader_data(oop loader); 1255 1256 static oop parent(oop loader); 1257 static bool isAncestor(oop loader, oop cl); 1258 1259 // Support for parallelCapable field 1260 static bool parallelCapable(oop the_class_mirror); 1261 1262 static bool is_trusted_loader(oop loader); 1263 1264 // Fix for 4474172 1265 static oop non_reflection_class_loader(oop loader); 1266 1267 // Testers 1268 static bool is_subclass(Klass* klass) { 1269 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1270 } 1271 static bool is_instance(oop obj); 1272 1273 static oop unnamedModule(oop loader); 1274 1275 // Debugging 1276 friend class JavaClasses; 1277 friend class ClassFileParser; // access to number_of_fake_fields 1278 }; 1279 1280 1281 // Interface to java.lang.System objects 1282 1283 class java_lang_System : AllStatic { 1284 private: 1285 enum { 1286 hc_static_in_offset = 0, 1287 hc_static_out_offset = 1, 1288 hc_static_err_offset = 2, 1289 hc_static_security_offset = 3 1290 }; 1291 1292 static int static_in_offset; 1293 static int static_out_offset; 1294 static int static_err_offset; 1295 static int static_security_offset; 1296 1297 public: 1298 static int in_offset_in_bytes(); 1299 static int out_offset_in_bytes(); 1300 static int err_offset_in_bytes(); 1301 1302 static bool has_security_manager(); 1303 1304 // Debugging 1305 friend class JavaClasses; 1306 }; 1307 1308 1309 // Interface to java.lang.StackTraceElement objects 1310 1311 class java_lang_StackTraceElement: AllStatic { 1312 private: 1313 enum { 1314 hc_moduleName_offset = 0, 1315 hc_moduleVersion_offset = 1, 1316 hc_declaringClass_offset = 2, 1317 hc_methodName_offset = 3, 1318 hc_fileName_offset = 4, 1319 hc_lineNumber_offset = 5 1320 }; 1321 1322 static int moduleName_offset; 1323 static int moduleVersion_offset; 1324 static int declaringClass_offset; 1325 static int methodName_offset; 1326 static int fileName_offset; 1327 static int lineNumber_offset; 1328 1329 // Setters 1330 static void set_moduleName(oop element, oop value); 1331 static void set_moduleVersion(oop element, oop value); 1332 static void set_declaringClass(oop element, oop value); 1333 static void set_methodName(oop element, oop value); 1334 static void set_fileName(oop element, oop value); 1335 static void set_lineNumber(oop element, int value); 1336 1337 public: 1338 // Create an instance of StackTraceElement 1339 static oop create(const methodHandle& method, int bci, TRAPS); 1340 1341 static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method, 1342 int version, int bci, int cpref, TRAPS); 1343 1344 // Debugging 1345 friend class JavaClasses; 1346 }; 1347 1348 1349 class Backtrace: AllStatic { 1350 public: 1351 // Helper backtrace functions to store bci|version together. 1352 static int merge_bci_and_version(int bci, int version); 1353 static int merge_mid_and_cpref(int mid, int cpref); 1354 static int bci_at(unsigned int merged); 1355 static int version_at(unsigned int merged); 1356 static int mid_at(unsigned int merged); 1357 static int cpref_at(unsigned int merged); 1358 static int get_line_number(const methodHandle& method, int bci); 1359 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1360 1361 // Debugging 1362 friend class JavaClasses; 1363 }; 1364 1365 // Interface to java.lang.StackFrameInfo objects 1366 1367 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1368 macro(java_lang_StackFrameInfo, version, short_signature, false) 1369 1370 class java_lang_StackFrameInfo: AllStatic { 1371 private: 1372 static int _declaringClass_offset; 1373 static int _memberName_offset; 1374 static int _bci_offset; 1375 static int _version_offset; 1376 1377 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1378 1379 public: 1380 // Setters 1381 static void set_declaringClass(oop info, oop value); 1382 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci); 1383 static void set_bci(oop info, int value); 1384 1385 static void set_version(oop info, short value); 1386 1387 static void compute_offsets(); 1388 1389 static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS); 1390 1391 // Debugging 1392 friend class JavaClasses; 1393 }; 1394 1395 class java_lang_LiveStackFrameInfo: AllStatic { 1396 private: 1397 static int _monitors_offset; 1398 static int _locals_offset; 1399 static int _operands_offset; 1400 1401 public: 1402 static void set_monitors(oop info, oop value); 1403 static void set_locals(oop info, oop value); 1404 static void set_operands(oop info, oop value); 1405 1406 static void compute_offsets(); 1407 1408 // Debugging 1409 friend class JavaClasses; 1410 }; 1411 1412 // Interface to java.lang.AssertionStatusDirectives objects 1413 1414 class java_lang_AssertionStatusDirectives: AllStatic { 1415 private: 1416 enum { 1417 hc_classes_offset, 1418 hc_classEnabled_offset, 1419 hc_packages_offset, 1420 hc_packageEnabled_offset, 1421 hc_deflt_offset 1422 }; 1423 1424 static int classes_offset; 1425 static int classEnabled_offset; 1426 static int packages_offset; 1427 static int packageEnabled_offset; 1428 static int deflt_offset; 1429 1430 public: 1431 // Setters 1432 static void set_classes(oop obj, oop val); 1433 static void set_classEnabled(oop obj, oop val); 1434 static void set_packages(oop obj, oop val); 1435 static void set_packageEnabled(oop obj, oop val); 1436 static void set_deflt(oop obj, bool val); 1437 // Debugging 1438 friend class JavaClasses; 1439 }; 1440 1441 1442 class java_nio_Buffer: AllStatic { 1443 private: 1444 static int _limit_offset; 1445 1446 public: 1447 static int limit_offset(); 1448 static void compute_offsets(); 1449 }; 1450 1451 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1452 private: 1453 static int _owner_offset; 1454 public: 1455 static void initialize(TRAPS); 1456 static oop get_owner_threadObj(oop obj); 1457 }; 1458 1459 // Use to declare fields that need to be injected into Java classes 1460 // for the JVM to use. The name_index and signature_index are 1461 // declared in vmSymbols. The may_be_java flag is used to declare 1462 // fields that might already exist in Java but should be injected if 1463 // they don't. Otherwise the field is unconditionally injected and 1464 // the JVM uses the injected one. This is to ensure that name 1465 // collisions don't occur. In general may_be_java should be false 1466 // unless there's a good reason. 1467 1468 class InjectedField { 1469 public: 1470 const SystemDictionary::WKID klass_id; 1471 const vmSymbols::SID name_index; 1472 const vmSymbols::SID signature_index; 1473 const bool may_be_java; 1474 1475 1476 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1477 Symbol* name() const { return lookup_symbol(name_index); } 1478 Symbol* signature() const { return lookup_symbol(signature_index); } 1479 1480 int compute_offset(); 1481 1482 // Find the Symbol for this index 1483 static Symbol* lookup_symbol(int symbol_index) { 1484 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1485 } 1486 }; 1487 1488 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1489 klass##_##name##_enum, 1490 1491 #define ALL_INJECTED_FIELDS(macro) \ 1492 CLASS_INJECTED_FIELDS(macro) \ 1493 CLASSLOADER_INJECTED_FIELDS(macro) \ 1494 MEMBERNAME_INJECTED_FIELDS(macro) \ 1495 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1496 STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1497 MODULE_INJECTED_FIELDS(macro) 1498 1499 // Interface to hard-coded offset checking 1500 1501 class JavaClasses : AllStatic { 1502 private: 1503 1504 static InjectedField _injected_fields[]; 1505 1506 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1507 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1508 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1509 1510 public: 1511 enum InjectedFieldID { 1512 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1513 MAX_enum 1514 }; 1515 1516 static int compute_injected_offset(InjectedFieldID id); 1517 1518 static void compute_hard_coded_offsets(); 1519 static void compute_offsets(); 1520 static void check_offsets() PRODUCT_RETURN; 1521 1522 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1523 }; 1524 1525 #undef DECLARE_INJECTED_FIELD_ENUM 1526 1527 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP