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 static unsigned int latin1_hash_code(typeArrayOop value, int len); 159 160 // This is the string hash code used by the StringTable, which may be 161 // the same as String.hashCode or an alternate hash code. 162 static unsigned int hash_string(oop java_string); 163 164 static bool equals(oop java_string, jchar* chars, int len); 165 static bool equals(oop str1, oop str2); 166 167 // Conversion between '.' and '/' formats 168 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 169 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 170 171 // Conversion 172 static Symbol* as_symbol(Handle java_string, TRAPS); 173 static Symbol* as_symbol_or_null(oop java_string); 174 175 // Testers 176 static bool is_instance(oop obj); 177 static inline bool is_instance_inlined(oop obj); 178 179 // Debugging 180 static void print(oop java_string, outputStream* st); 181 friend class JavaClasses; 182 friend class StringTable; 183 }; 184 185 186 // Interface to java.lang.Class objects 187 188 #define CLASS_INJECTED_FIELDS(macro) \ 189 macro(java_lang_Class, klass, intptr_signature, false) \ 190 macro(java_lang_Class, array_klass, intptr_signature, false) \ 191 macro(java_lang_Class, oop_size, int_signature, false) \ 192 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 193 macro(java_lang_Class, protection_domain, object_signature, false) \ 194 macro(java_lang_Class, signers, object_signature, false) 195 196 class java_lang_Class : AllStatic { 197 friend class VMStructs; 198 friend class JVMCIVMStructs; 199 200 private: 201 // The fake offsets are added by the class loader when java.lang.Class is loaded 202 203 static int _klass_offset; 204 static int _array_klass_offset; 205 206 static int _oop_size_offset; 207 static int _static_oop_field_count_offset; 208 209 static int _protection_domain_offset; 210 static int _init_lock_offset; 211 static int _signers_offset; 212 static int _class_loader_offset; 213 static int _component_mirror_offset; 214 215 static bool offsets_computed; 216 static int classRedefinedCount_offset; 217 218 static GrowableArray<Klass*>* _fixup_mirror_list; 219 220 static void set_init_lock(oop java_class, oop init_lock); 221 static void set_protection_domain(oop java_class, oop protection_domain); 222 static void set_class_loader(oop java_class, oop class_loader); 223 static void set_component_mirror(oop java_class, oop comp_mirror); 224 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS); 225 public: 226 static void compute_offsets(); 227 228 // Instance creation 229 static void create_mirror(KlassHandle k, Handle class_loader, 230 Handle protection_domain, TRAPS); 231 static void fixup_mirror(KlassHandle k, TRAPS); 232 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 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); 270 271 static int oop_size(oop java_class); 272 static void set_oop_size(oop java_class, int size); 273 static int static_oop_field_count(oop java_class); 274 static void set_static_oop_field_count(oop java_class, int size); 275 276 static GrowableArray<Klass*>* fixup_mirror_list() { 277 return _fixup_mirror_list; 278 } 279 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 280 _fixup_mirror_list = v; 281 } 282 // Debugging 283 friend class JavaClasses; 284 friend class InstanceKlass; // verification code accesses offsets 285 friend class ClassFileParser; // access to number_of_fake_fields 286 }; 287 288 // Interface to java.lang.Thread objects 289 290 class java_lang_Thread : AllStatic { 291 private: 292 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 293 // so we compute the offsets at startup rather than hard-wiring them. 294 static int _name_offset; 295 static int _group_offset; 296 static int _contextClassLoader_offset; 297 static int _inheritedAccessControlContext_offset; 298 static int _priority_offset; 299 static int _eetop_offset; 300 static int _daemon_offset; 301 static int _stillborn_offset; 302 static int _stackSize_offset; 303 static int _tid_offset; 304 static int _thread_status_offset; 305 static int _park_blocker_offset; 306 static int _park_event_offset ; 307 308 static void compute_offsets(); 309 310 public: 311 // Instance creation 312 static oop create(); 313 // Returns the JavaThread associated with the thread obj 314 static JavaThread* thread(oop java_thread); 315 // Set JavaThread for instance 316 static void set_thread(oop java_thread, JavaThread* thread); 317 // Name 318 static oop name(oop java_thread); 319 static void set_name(oop java_thread, oop name); 320 // Priority 321 static ThreadPriority priority(oop java_thread); 322 static void set_priority(oop java_thread, ThreadPriority priority); 323 // Thread group 324 static oop threadGroup(oop java_thread); 325 // Stillborn 326 static bool is_stillborn(oop java_thread); 327 static void set_stillborn(oop java_thread); 328 // Alive (NOTE: this is not really a field, but provides the correct 329 // definition without doing a Java call) 330 static bool is_alive(oop java_thread); 331 // Daemon 332 static bool is_daemon(oop java_thread); 333 static void set_daemon(oop java_thread); 334 // Context ClassLoader 335 static oop context_class_loader(oop java_thread); 336 // Control context 337 static oop inherited_access_control_context(oop java_thread); 338 // Stack size hint 339 static jlong stackSize(oop java_thread); 340 // Thread ID 341 static jlong thread_id(oop java_thread); 342 343 // Blocker object responsible for thread parking 344 static oop park_blocker(oop java_thread); 345 346 // Pointer to type-stable park handler, encoded as jlong. 347 // Should be set when apparently null 348 // For details, see unsafe.cpp Unsafe_Unpark 349 static jlong park_event(oop java_thread); 350 static bool set_park_event(oop java_thread, jlong ptr); 351 352 // Java Thread Status for JVMTI and M&M use. 353 // This thread status info is saved in threadStatus field of 354 // java.lang.Thread java class. 355 enum ThreadStatus { 356 NEW = 0, 357 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 358 JVMTI_THREAD_STATE_RUNNABLE, 359 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 360 JVMTI_THREAD_STATE_WAITING + 361 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 362 JVMTI_THREAD_STATE_SLEEPING, 363 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 364 JVMTI_THREAD_STATE_WAITING + 365 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 366 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 367 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 368 JVMTI_THREAD_STATE_WAITING + 369 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 370 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 371 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 372 JVMTI_THREAD_STATE_WAITING + 373 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 374 JVMTI_THREAD_STATE_PARKED, 375 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 376 JVMTI_THREAD_STATE_WAITING + 377 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 378 JVMTI_THREAD_STATE_PARKED, 379 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 380 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 381 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 382 }; 383 // Write thread status info to threadStatus field of java.lang.Thread. 384 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 385 // Read thread status info from threadStatus field of java.lang.Thread. 386 static ThreadStatus get_thread_status(oop java_thread_oop); 387 388 static const char* thread_status_name(oop java_thread_oop); 389 390 // Debugging 391 friend class JavaClasses; 392 }; 393 394 // Interface to java.lang.ThreadGroup objects 395 396 class java_lang_ThreadGroup : AllStatic { 397 private: 398 static int _parent_offset; 399 static int _name_offset; 400 static int _threads_offset; 401 static int _groups_offset; 402 static int _maxPriority_offset; 403 static int _destroyed_offset; 404 static int _daemon_offset; 405 static int _vmAllowSuspension_offset; 406 static int _nthreads_offset; 407 static int _ngroups_offset; 408 409 static void compute_offsets(); 410 411 public: 412 // parent ThreadGroup 413 static oop parent(oop java_thread_group); 414 // name 415 static const char* name(oop java_thread_group); 416 // ("name as oop" accessor is not necessary) 417 // Number of threads in group 418 static int nthreads(oop java_thread_group); 419 // threads 420 static objArrayOop threads(oop java_thread_group); 421 // Number of threads in group 422 static int ngroups(oop java_thread_group); 423 // groups 424 static objArrayOop groups(oop java_thread_group); 425 // maxPriority in group 426 static ThreadPriority maxPriority(oop java_thread_group); 427 // Destroyed 428 static bool is_destroyed(oop java_thread_group); 429 // Daemon 430 static bool is_daemon(oop java_thread_group); 431 // vmAllowSuspension 432 static bool is_vmAllowSuspension(oop java_thread_group); 433 // Debugging 434 friend class JavaClasses; 435 }; 436 437 438 439 // Interface to java.lang.Throwable objects 440 441 class java_lang_Throwable: AllStatic { 442 friend class BacktraceBuilder; 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_cprefs_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 cause_offset; 469 static int stackTrace_offset; 470 static int static_unassigned_stacktrace_offset; 471 472 // Printing 473 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref); 474 // StackTrace (programmatic access, new since 1.4) 475 static void clear_stacktrace(oop throwable); 476 // No stack trace available 477 static const char* no_stack_trace_message(); 478 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 479 static void set_stacktrace(oop throwable, oop st_element_array); 480 static oop unassigned_stacktrace(); 481 482 public: 483 // Backtrace 484 static oop backtrace(oop throwable); 485 static void set_backtrace(oop throwable, oop value); 486 // Needed by JVMTI to filter out this internal field. 487 static int get_backtrace_offset() { return backtrace_offset;} 488 static int get_detailMessage_offset() { return detailMessage_offset;} 489 // Message 490 static oop message(oop throwable); 491 static oop message(Handle throwable); 492 static void set_message(oop throwable, oop value); 493 static Symbol* detail_message(oop throwable); 494 static void print_stack_element(outputStream *st, Handle mirror, int method, 495 int version, int bci, int cpref); 496 static void print_stack_element(outputStream *st, const methodHandle& method, int bci); 497 static void print_stack_usage(Handle stream); 498 499 // Allocate space for backtrace (created but stack trace not filled in) 500 static void allocate_backtrace(Handle throwable, TRAPS); 501 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 502 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 503 // Fill in current stack trace, can cause GC 504 static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS); 505 static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle()); 506 // Programmatic access to stack trace 507 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 508 static int get_stack_trace_depth(oop throwable, TRAPS); 509 // Printing 510 static void print(Handle throwable, outputStream* st); 511 static void print_stack_trace(Handle throwable, outputStream* st); 512 static void java_printStackTrace(Handle throwable, TRAPS); 513 // Debugging 514 friend class JavaClasses; 515 }; 516 517 518 // Interface to java.lang.reflect.AccessibleObject objects 519 520 class java_lang_reflect_AccessibleObject: AllStatic { 521 private: 522 // Note that to reduce dependencies on the JDK we compute these 523 // offsets at run-time. 524 static int override_offset; 525 526 static void compute_offsets(); 527 528 public: 529 // Accessors 530 static jboolean override(oop reflect); 531 static void set_override(oop reflect, jboolean value); 532 533 // Debugging 534 friend class JavaClasses; 535 }; 536 537 538 // Interface to java.lang.reflect.Method objects 539 540 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 541 private: 542 // Note that to reduce dependencies on the JDK we compute these 543 // offsets at run-time. 544 static int clazz_offset; 545 static int name_offset; 546 static int returnType_offset; 547 static int parameterTypes_offset; 548 static int exceptionTypes_offset; 549 static int slot_offset; 550 static int modifiers_offset; 551 static int signature_offset; 552 static int annotations_offset; 553 static int parameter_annotations_offset; 554 static int annotation_default_offset; 555 static int type_annotations_offset; 556 557 static void compute_offsets(); 558 559 public: 560 // Allocation 561 static Handle create(TRAPS); 562 563 // Accessors 564 static oop clazz(oop reflect); 565 static void set_clazz(oop reflect, oop value); 566 567 static oop name(oop method); 568 static void set_name(oop method, oop value); 569 570 static oop return_type(oop method); 571 static void set_return_type(oop method, oop value); 572 573 static oop parameter_types(oop method); 574 static void set_parameter_types(oop method, oop value); 575 576 static oop exception_types(oop method); 577 static void set_exception_types(oop method, oop value); 578 579 static int slot(oop reflect); 580 static void set_slot(oop reflect, int value); 581 582 static int modifiers(oop method); 583 static void set_modifiers(oop method, int value); 584 585 static bool has_signature_field(); 586 static oop signature(oop method); 587 static void set_signature(oop method, oop value); 588 589 static bool has_annotations_field(); 590 static oop annotations(oop method); 591 static void set_annotations(oop method, oop value); 592 593 static bool has_parameter_annotations_field(); 594 static oop parameter_annotations(oop method); 595 static void set_parameter_annotations(oop method, oop value); 596 597 static bool has_annotation_default_field(); 598 static oop annotation_default(oop method); 599 static void set_annotation_default(oop method, oop value); 600 601 static bool has_type_annotations_field(); 602 static oop type_annotations(oop method); 603 static void set_type_annotations(oop method, oop value); 604 605 // Debugging 606 friend class JavaClasses; 607 }; 608 609 610 // Interface to java.lang.reflect.Constructor objects 611 612 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 613 private: 614 // Note that to reduce dependencies on the JDK we compute these 615 // offsets at run-time. 616 static int clazz_offset; 617 static int parameterTypes_offset; 618 static int exceptionTypes_offset; 619 static int slot_offset; 620 static int modifiers_offset; 621 static int signature_offset; 622 static int annotations_offset; 623 static int parameter_annotations_offset; 624 static int type_annotations_offset; 625 626 static void compute_offsets(); 627 628 public: 629 // Allocation 630 static Handle create(TRAPS); 631 632 // Accessors 633 static oop clazz(oop reflect); 634 static void set_clazz(oop reflect, oop value); 635 636 static oop parameter_types(oop constructor); 637 static void set_parameter_types(oop constructor, oop value); 638 639 static oop exception_types(oop constructor); 640 static void set_exception_types(oop constructor, oop value); 641 642 static int slot(oop reflect); 643 static void set_slot(oop reflect, int value); 644 645 static int modifiers(oop constructor); 646 static void set_modifiers(oop constructor, int value); 647 648 static bool has_signature_field(); 649 static oop signature(oop constructor); 650 static void set_signature(oop constructor, oop value); 651 652 static bool has_annotations_field(); 653 static oop annotations(oop constructor); 654 static void set_annotations(oop constructor, oop value); 655 656 static bool has_parameter_annotations_field(); 657 static oop parameter_annotations(oop method); 658 static void set_parameter_annotations(oop method, oop value); 659 660 static bool has_type_annotations_field(); 661 static oop type_annotations(oop constructor); 662 static void set_type_annotations(oop constructor, oop value); 663 664 // Debugging 665 friend class JavaClasses; 666 }; 667 668 669 // Interface to java.lang.reflect.Field objects 670 671 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 672 private: 673 // Note that to reduce dependencies on the JDK we compute these 674 // offsets at run-time. 675 static int clazz_offset; 676 static int name_offset; 677 static int type_offset; 678 static int slot_offset; 679 static int modifiers_offset; 680 static int signature_offset; 681 static int annotations_offset; 682 static int type_annotations_offset; 683 684 static void compute_offsets(); 685 686 public: 687 // Allocation 688 static Handle create(TRAPS); 689 690 // Accessors 691 static oop clazz(oop reflect); 692 static void set_clazz(oop reflect, oop value); 693 694 static oop name(oop field); 695 static void set_name(oop field, oop value); 696 697 static oop type(oop field); 698 static void set_type(oop field, oop value); 699 700 static int slot(oop reflect); 701 static void set_slot(oop reflect, int value); 702 703 static int modifiers(oop field); 704 static void set_modifiers(oop field, int value); 705 706 static bool has_signature_field(); 707 static oop signature(oop constructor); 708 static void set_signature(oop constructor, oop value); 709 710 static bool has_annotations_field(); 711 static oop annotations(oop constructor); 712 static void set_annotations(oop constructor, oop value); 713 714 static bool has_parameter_annotations_field(); 715 static oop parameter_annotations(oop method); 716 static void set_parameter_annotations(oop method, oop value); 717 718 static bool has_annotation_default_field(); 719 static oop annotation_default(oop method); 720 static void set_annotation_default(oop method, oop value); 721 722 static bool has_type_annotations_field(); 723 static oop type_annotations(oop field); 724 static void set_type_annotations(oop field, oop value); 725 726 // Debugging 727 friend class JavaClasses; 728 }; 729 730 class java_lang_reflect_Parameter { 731 private: 732 // Note that to reduce dependencies on the JDK we compute these 733 // offsets at run-time. 734 static int name_offset; 735 static int modifiers_offset; 736 static int index_offset; 737 static int executable_offset; 738 739 static void compute_offsets(); 740 741 public: 742 // Allocation 743 static Handle create(TRAPS); 744 745 // Accessors 746 static oop name(oop field); 747 static void set_name(oop field, oop value); 748 749 static int index(oop reflect); 750 static void set_index(oop reflect, int value); 751 752 static int modifiers(oop reflect); 753 static void set_modifiers(oop reflect, int value); 754 755 static oop executable(oop constructor); 756 static void set_executable(oop constructor, oop value); 757 758 friend class JavaClasses; 759 }; 760 761 // Interface to sun.reflect.ConstantPool objects 762 class sun_reflect_ConstantPool { 763 private: 764 // Note that to reduce dependencies on the JDK we compute these 765 // offsets at run-time. 766 static int _oop_offset; 767 768 static void compute_offsets(); 769 770 public: 771 // Allocation 772 static Handle create(TRAPS); 773 774 // Accessors 775 static void set_cp(oop reflect, ConstantPool* value); 776 static int oop_offset() { 777 return _oop_offset; 778 } 779 780 static ConstantPool* get_cp(oop reflect); 781 782 // Debugging 783 friend class JavaClasses; 784 }; 785 786 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 787 class sun_reflect_UnsafeStaticFieldAccessorImpl { 788 private: 789 static int _base_offset; 790 static void compute_offsets(); 791 792 public: 793 static int base_offset() { 794 return _base_offset; 795 } 796 797 // Debugging 798 friend class JavaClasses; 799 }; 800 801 // Interface to java.lang primitive type boxing objects: 802 // - java.lang.Boolean 803 // - java.lang.Character 804 // - java.lang.Float 805 // - java.lang.Double 806 // - java.lang.Byte 807 // - java.lang.Short 808 // - java.lang.Integer 809 // - java.lang.Long 810 811 // This could be separated out into 8 individual classes. 812 813 class java_lang_boxing_object: AllStatic { 814 private: 815 enum { 816 hc_value_offset = 0 817 }; 818 static int value_offset; 819 static int long_value_offset; 820 821 static oop initialize_and_allocate(BasicType type, TRAPS); 822 public: 823 // Allocation. Returns a boxed value, or NULL for invalid type. 824 static oop create(BasicType type, jvalue* value, TRAPS); 825 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 826 static BasicType get_value(oop box, jvalue* value); 827 static BasicType set_value(oop box, jvalue* value); 828 static BasicType basic_type(oop box); 829 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 830 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 831 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 832 static void print(BasicType type, jvalue* value, outputStream* st); 833 834 static int value_offset_in_bytes(BasicType type) { 835 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 836 value_offset; 837 } 838 839 // Debugging 840 friend class JavaClasses; 841 }; 842 843 844 845 // Interface to java.lang.ref.Reference objects 846 847 class java_lang_ref_Reference: AllStatic { 848 public: 849 enum { 850 hc_referent_offset = 0, 851 hc_queue_offset = 1, 852 hc_next_offset = 2, 853 hc_discovered_offset = 3 // Is not last, see SoftRefs. 854 }; 855 enum { 856 hc_static_lock_offset = 0, 857 hc_static_pending_offset = 1 858 }; 859 860 static int referent_offset; 861 static int queue_offset; 862 static int next_offset; 863 static int discovered_offset; 864 static int static_lock_offset; 865 static int static_pending_offset; 866 static int number_of_fake_oop_fields; 867 868 // Accessors 869 static inline oop referent(oop ref); 870 static inline void set_referent(oop ref, oop value); 871 static inline void set_referent_raw(oop ref, oop value); 872 static inline HeapWord* referent_addr(oop ref); 873 static inline oop next(oop ref); 874 static inline void set_next(oop ref, oop value); 875 static inline void set_next_raw(oop ref, oop value); 876 static inline HeapWord* next_addr(oop ref); 877 static inline oop discovered(oop ref); 878 static inline void set_discovered(oop ref, oop value); 879 static inline void set_discovered_raw(oop ref, oop value); 880 static inline HeapWord* discovered_addr(oop ref); 881 882 // Accessors for statics 883 static oop pending_list_lock(); 884 static oop pending_list(); 885 886 static HeapWord* pending_list_lock_addr(); 887 static HeapWord* pending_list_addr(); 888 }; 889 890 891 // Interface to java.lang.ref.SoftReference objects 892 893 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 894 public: 895 enum { 896 // The timestamp is a long field and may need to be adjusted for alignment. 897 hc_timestamp_offset = hc_discovered_offset + 1 898 }; 899 enum { 900 hc_static_clock_offset = 0 901 }; 902 903 static int timestamp_offset; 904 static int static_clock_offset; 905 906 // Accessors 907 static jlong timestamp(oop ref); 908 909 // Accessors for statics 910 static jlong clock(); 911 static void set_clock(jlong value); 912 }; 913 914 // Interface to java.lang.invoke.MethodHandle objects 915 916 class MethodHandleEntry; 917 918 class java_lang_invoke_MethodHandle: AllStatic { 919 friend class JavaClasses; 920 921 private: 922 static int _type_offset; // the MethodType of this MH 923 static int _form_offset; // the LambdaForm of this MH 924 925 static void compute_offsets(); 926 927 public: 928 // Accessors 929 static oop type(oop mh); 930 static void set_type(oop mh, oop mtype); 931 932 static oop form(oop mh); 933 static void set_form(oop mh, oop lform); 934 935 // Testers 936 static bool is_subclass(Klass* klass) { 937 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 938 } 939 static bool is_instance(oop obj); 940 941 // Accessors for code generation: 942 static int type_offset_in_bytes() { return _type_offset; } 943 static int form_offset_in_bytes() { return _form_offset; } 944 }; 945 946 // Interface to java.lang.invoke.DirectMethodHandle objects 947 948 class java_lang_invoke_DirectMethodHandle: AllStatic { 949 friend class JavaClasses; 950 951 private: 952 static int _member_offset; // the MemberName of this DMH 953 954 static void compute_offsets(); 955 956 public: 957 // Accessors 958 static oop member(oop mh); 959 960 // Testers 961 static bool is_subclass(Klass* klass) { 962 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 963 } 964 static bool is_instance(oop obj); 965 966 // Accessors for code generation: 967 static int member_offset_in_bytes() { return _member_offset; } 968 }; 969 970 // Interface to java.lang.invoke.LambdaForm objects 971 // (These are a private interface for managing adapter code generation.) 972 973 class java_lang_invoke_LambdaForm: AllStatic { 974 friend class JavaClasses; 975 976 private: 977 static int _vmentry_offset; // type is MemberName 978 979 static void compute_offsets(); 980 981 public: 982 // Accessors 983 static oop vmentry(oop lform); 984 static void set_vmentry(oop lform, oop invoker); 985 986 // Testers 987 static bool is_subclass(Klass* klass) { 988 return SystemDictionary::LambdaForm_klass() != NULL && 989 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 990 } 991 static bool is_instance(oop obj); 992 993 // Accessors for code generation: 994 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 995 }; 996 997 998 // Interface to java.lang.invoke.MemberName objects 999 // (These are a private interface for Java code to query the class hierarchy.) 1000 1001 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1002 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1003 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1004 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1005 1006 class java_lang_invoke_MemberName: AllStatic { 1007 friend class JavaClasses; 1008 1009 private: 1010 // From java.lang.invoke.MemberName: 1011 // private Class<?> clazz; // class in which the method is defined 1012 // private String name; // may be null if not yet materialized 1013 // private Object type; // may be null if not yet materialized 1014 // private int flags; // modifier bits; see reflect.Modifier 1015 // private intptr vmtarget; // VM-specific target value 1016 // private intptr_t vmindex; // member index within class or interface 1017 static int _clazz_offset; 1018 static int _name_offset; 1019 static int _type_offset; 1020 static int _flags_offset; 1021 static int _vmtarget_offset; 1022 static int _vmloader_offset; 1023 static int _vmindex_offset; 1024 1025 static void compute_offsets(); 1026 1027 public: 1028 // Accessors 1029 static oop clazz(oop mname); 1030 static void set_clazz(oop mname, oop clazz); 1031 1032 static oop type(oop mname); 1033 static void set_type(oop mname, oop type); 1034 1035 static oop name(oop mname); 1036 static void set_name(oop mname, oop name); 1037 1038 static int flags(oop mname); 1039 static void set_flags(oop mname, int flags); 1040 1041 static Metadata* vmtarget(oop mname); 1042 static void set_vmtarget(oop mname, Metadata* target); 1043 1044 static intptr_t vmindex(oop mname); 1045 static void set_vmindex(oop mname, intptr_t index); 1046 1047 // Testers 1048 static bool is_subclass(Klass* klass) { 1049 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1050 } 1051 static bool is_instance(oop obj); 1052 1053 static bool is_method(oop obj); 1054 1055 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1056 enum { 1057 MN_IS_METHOD = 0x00010000, // method (not constructor) 1058 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1059 MN_IS_FIELD = 0x00040000, // field 1060 MN_IS_TYPE = 0x00080000, // nested type 1061 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1062 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1063 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1064 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1065 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1066 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1067 }; 1068 1069 // Accessors for code generation: 1070 static int clazz_offset_in_bytes() { return _clazz_offset; } 1071 static int type_offset_in_bytes() { return _type_offset; } 1072 static int name_offset_in_bytes() { return _name_offset; } 1073 static int flags_offset_in_bytes() { return _flags_offset; } 1074 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1075 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1076 }; 1077 1078 1079 // Interface to java.lang.invoke.MethodType objects 1080 1081 class java_lang_invoke_MethodType: AllStatic { 1082 friend class JavaClasses; 1083 1084 private: 1085 static int _rtype_offset; 1086 static int _ptypes_offset; 1087 1088 static void compute_offsets(); 1089 1090 public: 1091 // Accessors 1092 static oop rtype(oop mt); 1093 static objArrayOop ptypes(oop mt); 1094 1095 static oop ptype(oop mt, int index); 1096 static int ptype_count(oop mt); 1097 1098 static int ptype_slot_count(oop mt); // extra counts for long/double 1099 static int rtype_slot_count(oop mt); // extra counts for long/double 1100 1101 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1102 static void print_signature(oop mt, outputStream* st); 1103 1104 static bool is_instance(oop obj); 1105 1106 static bool equals(oop mt1, oop mt2); 1107 1108 // Accessors for code generation: 1109 static int rtype_offset_in_bytes() { return _rtype_offset; } 1110 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1111 }; 1112 1113 1114 // Interface to java.lang.invoke.CallSite objects 1115 1116 class java_lang_invoke_CallSite: AllStatic { 1117 friend class JavaClasses; 1118 1119 private: 1120 static int _target_offset; 1121 static int _context_offset; 1122 1123 static void compute_offsets(); 1124 1125 public: 1126 // Accessors 1127 static oop target( oop site); 1128 static void set_target( oop site, oop target); 1129 static void set_target_volatile( oop site, oop target); 1130 1131 static oop context(oop site); 1132 1133 // Testers 1134 static bool is_subclass(Klass* klass) { 1135 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1136 } 1137 static bool is_instance(oop obj); 1138 1139 // Accessors for code generation: 1140 static int target_offset_in_bytes() { return _target_offset; } 1141 }; 1142 1143 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1144 1145 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1146 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1147 1148 class DependencyContext; 1149 1150 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1151 friend class JavaClasses; 1152 1153 private: 1154 static int _vmdependencies_offset; 1155 1156 static void compute_offsets(); 1157 1158 public: 1159 // Accessors 1160 static DependencyContext vmdependencies(oop context); 1161 1162 // Testers 1163 static bool is_subclass(Klass* klass) { 1164 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1165 } 1166 static bool is_instance(oop obj); 1167 }; 1168 1169 // Interface to java.security.AccessControlContext objects 1170 1171 class java_security_AccessControlContext: AllStatic { 1172 private: 1173 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1174 // so we compute the offsets at startup rather than hard-wiring them. 1175 static int _context_offset; 1176 static int _privilegedContext_offset; 1177 static int _isPrivileged_offset; 1178 static int _isAuthorized_offset; 1179 1180 static void compute_offsets(); 1181 public: 1182 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1183 1184 static bool is_authorized(Handle context); 1185 1186 // Debugging/initialization 1187 friend class JavaClasses; 1188 }; 1189 1190 1191 // Interface to java.lang.ClassLoader objects 1192 1193 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1194 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1195 1196 class java_lang_ClassLoader : AllStatic { 1197 private: 1198 // The fake offsets are added by the class loader when java.lang.Class is loaded 1199 enum { 1200 hc_parent_offset = 0 1201 }; 1202 static int _loader_data_offset; 1203 static bool offsets_computed; 1204 static int parent_offset; 1205 static int parallelCapable_offset; 1206 1207 public: 1208 static void compute_offsets(); 1209 1210 static ClassLoaderData** loader_data_addr(oop loader); 1211 static ClassLoaderData* loader_data(oop loader); 1212 1213 static oop parent(oop loader); 1214 static bool isAncestor(oop loader, oop cl); 1215 1216 // Support for parallelCapable field 1217 static bool parallelCapable(oop the_class_mirror); 1218 1219 static bool is_trusted_loader(oop loader); 1220 1221 // Fix for 4474172 1222 static oop non_reflection_class_loader(oop loader); 1223 1224 // Testers 1225 static bool is_subclass(Klass* klass) { 1226 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1227 } 1228 static bool is_instance(oop obj); 1229 1230 // Debugging 1231 friend class JavaClasses; 1232 friend class ClassFileParser; // access to number_of_fake_fields 1233 }; 1234 1235 1236 // Interface to java.lang.System objects 1237 1238 class java_lang_System : AllStatic { 1239 private: 1240 enum { 1241 hc_static_in_offset = 0, 1242 hc_static_out_offset = 1, 1243 hc_static_err_offset = 2, 1244 hc_static_security_offset = 3 1245 }; 1246 1247 static int static_in_offset; 1248 static int static_out_offset; 1249 static int static_err_offset; 1250 static int static_security_offset; 1251 1252 public: 1253 static int in_offset_in_bytes(); 1254 static int out_offset_in_bytes(); 1255 static int err_offset_in_bytes(); 1256 1257 static bool has_security_manager(); 1258 1259 // Debugging 1260 friend class JavaClasses; 1261 }; 1262 1263 1264 // Interface to java.lang.StackTraceElement objects 1265 1266 class java_lang_StackTraceElement: AllStatic { 1267 private: 1268 enum { 1269 hc_declaringClass_offset = 0, 1270 hc_methodName_offset = 1, 1271 hc_fileName_offset = 2, 1272 hc_lineNumber_offset = 3 1273 }; 1274 1275 static int declaringClass_offset; 1276 static int methodName_offset; 1277 static int fileName_offset; 1278 static int lineNumber_offset; 1279 1280 public: 1281 // Setters 1282 static void set_declaringClass(oop element, oop value); 1283 static void set_methodName(oop element, oop value); 1284 static void set_fileName(oop element, oop value); 1285 static void set_lineNumber(oop element, int value); 1286 1287 // Create an instance of StackTraceElement 1288 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS); 1289 static oop create(const methodHandle& method, int bci, TRAPS); 1290 1291 // Debugging 1292 friend class JavaClasses; 1293 }; 1294 1295 1296 class Backtrace: AllStatic { 1297 public: 1298 // Helper backtrace functions to store bci|version together. 1299 static int merge_bci_and_version(int bci, int version); 1300 static int merge_mid_and_cpref(int mid, int cpref); 1301 static int bci_at(unsigned int merged); 1302 static int version_at(unsigned int merged); 1303 static int mid_at(unsigned int merged); 1304 static int cpref_at(unsigned int merged); 1305 static int get_line_number(const methodHandle& method, int bci); 1306 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1307 1308 // Debugging 1309 friend class JavaClasses; 1310 }; 1311 1312 // Interface to java.lang.StackFrameInfo objects 1313 1314 #define STACKFRAMEINFO_INJECTED_FIELDS(macro) \ 1315 macro(java_lang_StackFrameInfo, mid, short_signature, false) \ 1316 macro(java_lang_StackFrameInfo, version, short_signature, false) \ 1317 macro(java_lang_StackFrameInfo, cpref, short_signature, false) 1318 1319 class java_lang_StackFrameInfo: AllStatic { 1320 private: 1321 static int _declaringClass_offset; 1322 static int _memberName_offset; 1323 static int _bci_offset; 1324 static int _methodName_offset; 1325 static int _fileName_offset; 1326 static int _lineNumber_offset; 1327 1328 static int _mid_offset; 1329 static int _version_offset; 1330 static int _cpref_offset; 1331 1332 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1333 static Symbol* get_file_name(Handle stackFrame, InstanceKlass* holder); 1334 1335 public: 1336 // Setters 1337 static void set_declaringClass(oop info, oop value); 1338 static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci); 1339 static void set_bci(oop info, int value); 1340 1341 // set method info in an instance of StackFrameInfo 1342 static void fill_methodInfo(Handle info, TRAPS); 1343 static void set_methodName(oop info, oop value); 1344 static void set_fileName(oop info, oop value); 1345 static void set_lineNumber(oop info, int value); 1346 1347 // these injected fields are only used if -XX:-MemberNameInStackFrame set 1348 static void set_mid(oop info, short value); 1349 static void set_version(oop info, short value); 1350 static void set_cpref(oop info, short value); 1351 1352 static void compute_offsets(); 1353 1354 // Debugging 1355 friend class JavaClasses; 1356 }; 1357 1358 class java_lang_LiveStackFrameInfo: AllStatic { 1359 private: 1360 static int _monitors_offset; 1361 static int _locals_offset; 1362 static int _operands_offset; 1363 1364 public: 1365 static void set_monitors(oop info, oop value); 1366 static void set_locals(oop info, oop value); 1367 static void set_operands(oop info, oop value); 1368 1369 static void compute_offsets(); 1370 1371 // Debugging 1372 friend class JavaClasses; 1373 }; 1374 1375 // Interface to java.lang.AssertionStatusDirectives objects 1376 1377 class java_lang_AssertionStatusDirectives: AllStatic { 1378 private: 1379 enum { 1380 hc_classes_offset, 1381 hc_classEnabled_offset, 1382 hc_packages_offset, 1383 hc_packageEnabled_offset, 1384 hc_deflt_offset 1385 }; 1386 1387 static int classes_offset; 1388 static int classEnabled_offset; 1389 static int packages_offset; 1390 static int packageEnabled_offset; 1391 static int deflt_offset; 1392 1393 public: 1394 // Setters 1395 static void set_classes(oop obj, oop val); 1396 static void set_classEnabled(oop obj, oop val); 1397 static void set_packages(oop obj, oop val); 1398 static void set_packageEnabled(oop obj, oop val); 1399 static void set_deflt(oop obj, bool val); 1400 // Debugging 1401 friend class JavaClasses; 1402 }; 1403 1404 1405 class java_nio_Buffer: AllStatic { 1406 private: 1407 static int _limit_offset; 1408 1409 public: 1410 static int limit_offset(); 1411 static void compute_offsets(); 1412 }; 1413 1414 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1415 private: 1416 static int _owner_offset; 1417 public: 1418 static void initialize(TRAPS); 1419 static oop get_owner_threadObj(oop obj); 1420 }; 1421 1422 // Use to declare fields that need to be injected into Java classes 1423 // for the JVM to use. The name_index and signature_index are 1424 // declared in vmSymbols. The may_be_java flag is used to declare 1425 // fields that might already exist in Java but should be injected if 1426 // they don't. Otherwise the field is unconditionally injected and 1427 // the JVM uses the injected one. This is to ensure that name 1428 // collisions don't occur. In general may_be_java should be false 1429 // unless there's a good reason. 1430 1431 class InjectedField { 1432 public: 1433 const SystemDictionary::WKID klass_id; 1434 const vmSymbols::SID name_index; 1435 const vmSymbols::SID signature_index; 1436 const bool may_be_java; 1437 1438 1439 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1440 Symbol* name() const { return lookup_symbol(name_index); } 1441 Symbol* signature() const { return lookup_symbol(signature_index); } 1442 1443 int compute_offset(); 1444 1445 // Find the Symbol for this index 1446 static Symbol* lookup_symbol(int symbol_index) { 1447 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1448 } 1449 }; 1450 1451 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1452 klass##_##name##_enum, 1453 1454 #define ALL_INJECTED_FIELDS(macro) \ 1455 CLASS_INJECTED_FIELDS(macro) \ 1456 CLASSLOADER_INJECTED_FIELDS(macro) \ 1457 MEMBERNAME_INJECTED_FIELDS(macro) \ 1458 CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1459 STACKFRAMEINFO_INJECTED_FIELDS(macro) 1460 1461 1462 // Interface to hard-coded offset checking 1463 1464 class JavaClasses : AllStatic { 1465 private: 1466 1467 static InjectedField _injected_fields[]; 1468 1469 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1470 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1471 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1472 1473 public: 1474 enum InjectedFieldID { 1475 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1476 MAX_enum 1477 }; 1478 1479 static int compute_injected_offset(InjectedFieldID id); 1480 1481 static void compute_hard_coded_offsets(); 1482 static void compute_offsets(); 1483 static void check_offsets() PRODUCT_RETURN; 1484 1485 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1486 }; 1487 1488 #undef DECLARE_INJECTED_FIELD_ENUM 1489 1490 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP --- EOF ---