1 /* 2 * Copyright (c) 1997, 2015, 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 offset_offset; 57 static int count_offset; 58 static int hash_offset; 59 60 static bool initialized; 61 62 static Handle basic_create(int length, TRAPS); 63 64 static void set_offset(oop string, int offset) { 65 assert(initialized, "Must be initialized"); 66 if (offset_offset > 0) { 67 string->int_field_put(offset_offset, offset); 68 } 69 } 70 static void set_count( oop string, int count) { 71 assert(initialized, "Must be initialized"); 72 if (count_offset > 0) { 73 string->int_field_put(count_offset, count); 74 } 75 } 76 77 public: 78 static void compute_offsets(); 79 80 // Instance creation 81 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 82 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 83 static Handle create_from_str(const char* utf8_str, TRAPS); 84 static oop create_oop_from_str(const char* utf8_str, TRAPS); 85 static Handle create_from_symbol(Symbol* symbol, TRAPS); 86 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 87 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 88 89 static bool has_offset_field() { 90 assert(initialized, "Must be initialized"); 91 return (offset_offset > 0); 92 } 93 94 static bool has_count_field() { 95 assert(initialized, "Must be initialized"); 96 return (count_offset > 0); 97 } 98 99 static bool has_hash_field() { 100 assert(initialized, "Must be initialized"); 101 return (hash_offset > 0); 102 } 103 104 static int value_offset_in_bytes() { 105 assert(initialized && (value_offset > 0), "Must be initialized"); 106 return value_offset; 107 } 108 static int count_offset_in_bytes() { 109 assert(initialized && (count_offset > 0), "Must be initialized"); 110 return count_offset; 111 } 112 static int offset_offset_in_bytes() { 113 assert(initialized && (offset_offset > 0), "Must be initialized"); 114 return offset_offset; 115 } 116 static int hash_offset_in_bytes() { 117 assert(initialized && (hash_offset > 0), "Must be initialized"); 118 return hash_offset; 119 } 120 121 static void set_value_raw(oop string, typeArrayOop buffer) { 122 assert(initialized, "Must be initialized"); 123 string->obj_field_put_raw(value_offset, buffer); 124 } 125 static void set_value(oop string, typeArrayOop buffer) { 126 assert(initialized && (value_offset > 0), "Must be initialized"); 127 string->obj_field_put(value_offset, (oop)buffer); 128 } 129 static void set_hash(oop string, unsigned int hash) { 130 assert(initialized && (hash_offset > 0), "Must be initialized"); 131 string->int_field_put(hash_offset, hash); 132 } 133 134 // Accessors 135 static typeArrayOop value(oop java_string) { 136 assert(initialized && (value_offset > 0), "Must be initialized"); 137 assert(is_instance(java_string), "must be java_string"); 138 return (typeArrayOop) java_string->obj_field(value_offset); 139 } 140 static unsigned int hash(oop java_string) { 141 assert(initialized && (hash_offset > 0), "Must be initialized"); 142 assert(is_instance(java_string), "must be java_string"); 143 return java_string->int_field(hash_offset); 144 } 145 static int offset(oop java_string) { 146 assert(initialized, "Must be initialized"); 147 assert(is_instance(java_string), "must be java_string"); 148 if (offset_offset > 0) { 149 return java_string->int_field(offset_offset); 150 } else { 151 return 0; 152 } 153 } 154 static int length(oop java_string) { 155 assert(initialized, "Must be initialized"); 156 assert(is_instance(java_string), "must be java_string"); 157 if (count_offset > 0) { 158 return java_string->int_field(count_offset); 159 } else { 160 return ((typeArrayOop)java_string->obj_field(value_offset))->length(); 161 } 162 } 163 static int utf8_length(oop java_string); 164 165 // String converters 166 static char* as_utf8_string(oop java_string); 167 static char* as_utf8_string(oop java_string, char* buf, int buflen); 168 static char* as_utf8_string(oop java_string, int start, int len); 169 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 170 static char* as_platform_dependent_str(Handle java_string, TRAPS); 171 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 172 // produce an ascii string with all other values quoted using \u#### 173 static char* as_quoted_ascii(oop java_string); 174 175 // Compute the hash value for a java.lang.String object which would 176 // contain the characters passed in. 177 // 178 // As the hash value used by the String object itself, in 179 // String.hashCode(). This value is normally calculated in Java code 180 // in the String.hashCode method(), but is precomputed for String 181 // objects in the shared archive file. 182 // hash P(31) from Kernighan & Ritchie 183 // 184 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 185 template <typename T> static unsigned int hash_code(T* s, int len) { 186 unsigned int h = 0; 187 while (len-- > 0) { 188 h = 31*h + (unsigned int) *s; 189 s++; 190 } 191 return h; 192 } 193 static unsigned int hash_code(oop java_string); 194 195 // This is the string hash code used by the StringTable, which may be 196 // the same as String.hashCode or an alternate hash code. 197 static unsigned int hash_string(oop java_string); 198 199 static bool equals(oop java_string, jchar* chars, int len); 200 static bool equals(oop str1, oop str2); 201 202 // Conversion between '.' and '/' formats 203 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 204 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 205 206 // Conversion 207 static Symbol* as_symbol(Handle java_string, TRAPS); 208 static Symbol* as_symbol_or_null(oop java_string); 209 210 // Testers 211 static bool is_instance(oop obj); 212 static bool is_instance_inlined(oop obj); 213 214 // Debugging 215 static void print(oop java_string, outputStream* st); 216 friend class JavaClasses; 217 friend class StringTable; 218 }; 219 220 221 // Interface to java.lang.Class objects 222 223 #define CLASS_INJECTED_FIELDS(macro) \ 224 macro(java_lang_Class, klass, intptr_signature, false) \ 225 macro(java_lang_Class, array_klass, intptr_signature, false) \ 226 macro(java_lang_Class, oop_size, int_signature, false) \ 227 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 228 macro(java_lang_Class, protection_domain, object_signature, false) \ 229 macro(java_lang_Class, signers, object_signature, false) 230 231 class java_lang_Class : AllStatic { 232 friend class VMStructs; 233 234 private: 235 // The fake offsets are added by the class loader when java.lang.Class is loaded 236 237 static int _klass_offset; 238 static int _array_klass_offset; 239 240 static int _oop_size_offset; 241 static int _static_oop_field_count_offset; 242 243 static int _protection_domain_offset; 244 static int _init_lock_offset; 245 static int _signers_offset; 246 static int _class_loader_offset; 247 static int _component_mirror_offset; 248 249 static bool offsets_computed; 250 static int classRedefinedCount_offset; 251 252 static GrowableArray<Klass*>* _fixup_mirror_list; 253 254 static void set_init_lock(oop java_class, oop init_lock); 255 static void set_protection_domain(oop java_class, oop protection_domain); 256 static void set_class_loader(oop java_class, oop class_loader); 257 static void set_component_mirror(oop java_class, oop comp_mirror); 258 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS); 259 public: 260 static void compute_offsets(); 261 262 // Instance creation 263 static void create_mirror(KlassHandle k, Handle class_loader, 264 Handle protection_domain, TRAPS); 265 static void fixup_mirror(KlassHandle k, TRAPS); 266 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 267 // Conversion 268 static Klass* as_Klass(oop java_class); 269 static void set_klass(oop java_class, Klass* klass); 270 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 271 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 272 Klass* refk_oop = NULL; 273 BasicType result = as_BasicType(java_class, &refk_oop); 274 (*reference_klass) = KlassHandle(refk_oop); 275 return result; 276 } 277 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 278 static void print_signature(oop java_class, outputStream *st); 279 // Testing 280 static bool is_instance(oop obj); 281 282 static bool is_primitive(oop java_class); 283 static BasicType primitive_type(oop java_class); 284 static oop primitive_mirror(BasicType t); 285 // JVM_NewArray support 286 static Klass* array_klass(oop java_class); 287 static void set_array_klass(oop java_class, Klass* klass); 288 // compiler support for class operations 289 static int klass_offset_in_bytes() { return _klass_offset; } 290 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 291 // Support for classRedefinedCount field 292 static int classRedefinedCount(oop the_class_mirror); 293 static void set_classRedefinedCount(oop the_class_mirror, int value); 294 295 // Support for embedded per-class oops 296 static oop protection_domain(oop java_class); 297 static oop init_lock(oop java_class); 298 static oop component_mirror(oop java_class); 299 static objArrayOop signers(oop java_class); 300 static void set_signers(oop java_class, objArrayOop signers); 301 302 static oop class_loader(oop java_class); 303 304 static int oop_size(oop java_class); 305 static void set_oop_size(oop java_class, int size); 306 static int static_oop_field_count(oop java_class); 307 static void set_static_oop_field_count(oop java_class, int size); 308 309 static GrowableArray<Klass*>* fixup_mirror_list() { 310 return _fixup_mirror_list; 311 } 312 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 313 _fixup_mirror_list = v; 314 } 315 // Debugging 316 friend class JavaClasses; 317 friend class InstanceKlass; // verification code accesses offsets 318 friend class ClassFileParser; // access to number_of_fake_fields 319 }; 320 321 // Interface to java.lang.Thread objects 322 323 class java_lang_Thread : AllStatic { 324 private: 325 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 326 // so we compute the offsets at startup rather than hard-wiring them. 327 static int _name_offset; 328 static int _group_offset; 329 static int _contextClassLoader_offset; 330 static int _inheritedAccessControlContext_offset; 331 static int _priority_offset; 332 static int _eetop_offset; 333 static int _daemon_offset; 334 static int _stillborn_offset; 335 static int _stackSize_offset; 336 static int _tid_offset; 337 static int _thread_status_offset; 338 static int _park_blocker_offset; 339 static int _park_event_offset ; 340 341 static void compute_offsets(); 342 343 public: 344 // Instance creation 345 static oop create(); 346 // Returns the JavaThread associated with the thread obj 347 static JavaThread* thread(oop java_thread); 348 // Set JavaThread for instance 349 static void set_thread(oop java_thread, JavaThread* thread); 350 // Name 351 static oop name(oop java_thread); 352 static void set_name(oop java_thread, oop name); 353 // Priority 354 static ThreadPriority priority(oop java_thread); 355 static void set_priority(oop java_thread, ThreadPriority priority); 356 // Thread group 357 static oop threadGroup(oop java_thread); 358 // Stillborn 359 static bool is_stillborn(oop java_thread); 360 static void set_stillborn(oop java_thread); 361 // Alive (NOTE: this is not really a field, but provides the correct 362 // definition without doing a Java call) 363 static bool is_alive(oop java_thread); 364 // Daemon 365 static bool is_daemon(oop java_thread); 366 static void set_daemon(oop java_thread); 367 // Context ClassLoader 368 static oop context_class_loader(oop java_thread); 369 // Control context 370 static oop inherited_access_control_context(oop java_thread); 371 // Stack size hint 372 static jlong stackSize(oop java_thread); 373 // Thread ID 374 static jlong thread_id(oop java_thread); 375 376 // Blocker object responsible for thread parking 377 static oop park_blocker(oop java_thread); 378 379 // Pointer to type-stable park handler, encoded as jlong. 380 // Should be set when apparently null 381 // For details, see unsafe.cpp Unsafe_Unpark 382 static jlong park_event(oop java_thread); 383 static bool set_park_event(oop java_thread, jlong ptr); 384 385 // Java Thread Status for JVMTI and M&M use. 386 // This thread status info is saved in threadStatus field of 387 // java.lang.Thread java class. 388 enum ThreadStatus { 389 NEW = 0, 390 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 391 JVMTI_THREAD_STATE_RUNNABLE, 392 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 393 JVMTI_THREAD_STATE_WAITING + 394 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 395 JVMTI_THREAD_STATE_SLEEPING, 396 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 397 JVMTI_THREAD_STATE_WAITING + 398 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 399 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 400 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 401 JVMTI_THREAD_STATE_WAITING + 402 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 403 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 404 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 405 JVMTI_THREAD_STATE_WAITING + 406 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 407 JVMTI_THREAD_STATE_PARKED, 408 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 409 JVMTI_THREAD_STATE_WAITING + 410 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 411 JVMTI_THREAD_STATE_PARKED, 412 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 413 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 414 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 415 }; 416 // Write thread status info to threadStatus field of java.lang.Thread. 417 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 418 // Read thread status info from threadStatus field of java.lang.Thread. 419 static ThreadStatus get_thread_status(oop java_thread_oop); 420 421 static const char* thread_status_name(oop java_thread_oop); 422 423 // Debugging 424 friend class JavaClasses; 425 }; 426 427 // Interface to java.lang.ThreadGroup objects 428 429 class java_lang_ThreadGroup : AllStatic { 430 private: 431 static int _parent_offset; 432 static int _name_offset; 433 static int _threads_offset; 434 static int _groups_offset; 435 static int _maxPriority_offset; 436 static int _destroyed_offset; 437 static int _daemon_offset; 438 static int _vmAllowSuspension_offset; 439 static int _nthreads_offset; 440 static int _ngroups_offset; 441 442 static void compute_offsets(); 443 444 public: 445 // parent ThreadGroup 446 static oop parent(oop java_thread_group); 447 // name 448 static typeArrayOop name(oop java_thread_group); 449 // ("name as oop" accessor is not necessary) 450 // Number of threads in group 451 static int nthreads(oop java_thread_group); 452 // threads 453 static objArrayOop threads(oop java_thread_group); 454 // Number of threads in group 455 static int ngroups(oop java_thread_group); 456 // groups 457 static objArrayOop groups(oop java_thread_group); 458 // maxPriority in group 459 static ThreadPriority maxPriority(oop java_thread_group); 460 // Destroyed 461 static bool is_destroyed(oop java_thread_group); 462 // Daemon 463 static bool is_daemon(oop java_thread_group); 464 // vmAllowSuspension 465 static bool is_vmAllowSuspension(oop java_thread_group); 466 // Debugging 467 friend class JavaClasses; 468 }; 469 470 471 472 // Interface to java.lang.Throwable objects 473 474 class java_lang_Throwable: AllStatic { 475 friend class BacktraceBuilder; 476 477 private: 478 // Offsets 479 enum { 480 hc_backtrace_offset = 0, 481 hc_detailMessage_offset = 1, 482 hc_cause_offset = 2, // New since 1.4 483 hc_stackTrace_offset = 3 // New since 1.4 484 }; 485 enum { 486 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 487 }; 488 // Trace constants 489 enum { 490 trace_methods_offset = 0, 491 trace_bcis_offset = 1, 492 trace_mirrors_offset = 2, 493 trace_cprefs_offset = 3, 494 trace_next_offset = 4, 495 trace_size = 5, 496 trace_chunk_size = 32 497 }; 498 499 static int backtrace_offset; 500 static int detailMessage_offset; 501 static int cause_offset; 502 static int stackTrace_offset; 503 static int static_unassigned_stacktrace_offset; 504 505 // Printing 506 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref); 507 // StackTrace (programmatic access, new since 1.4) 508 static void clear_stacktrace(oop throwable); 509 // No stack trace available 510 static const char* no_stack_trace_message(); 511 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 512 static void set_stacktrace(oop throwable, oop st_element_array); 513 static oop unassigned_stacktrace(); 514 515 public: 516 // Backtrace 517 static oop backtrace(oop throwable); 518 static void set_backtrace(oop throwable, oop value); 519 // Needed by JVMTI to filter out this internal field. 520 static int get_backtrace_offset() { return backtrace_offset;} 521 static int get_detailMessage_offset() { return detailMessage_offset;} 522 // Message 523 static oop message(oop throwable); 524 static oop message(Handle throwable); 525 static void set_message(oop throwable, oop value); 526 static Symbol* detail_message(oop throwable); 527 static void print_stack_element(outputStream *st, Handle mirror, int method, 528 int version, int bci, int cpref); 529 static void print_stack_element(outputStream *st, methodHandle method, int bci); 530 static void print_stack_usage(Handle stream); 531 532 // Allocate space for backtrace (created but stack trace not filled in) 533 static void allocate_backtrace(Handle throwable, TRAPS); 534 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 535 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 536 // Fill in current stack trace, can cause GC 537 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS); 538 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle()); 539 // Programmatic access to stack trace 540 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 541 static int get_stack_trace_depth(oop throwable, TRAPS); 542 // Printing 543 static void print(oop throwable, outputStream* st); 544 static void print(Handle throwable, outputStream* st); 545 static void print_stack_trace(oop throwable, outputStream* st); 546 // Debugging 547 friend class JavaClasses; 548 }; 549 550 551 // Interface to java.lang.reflect.AccessibleObject objects 552 553 class java_lang_reflect_AccessibleObject: AllStatic { 554 private: 555 // Note that to reduce dependencies on the JDK we compute these 556 // offsets at run-time. 557 static int override_offset; 558 559 static void compute_offsets(); 560 561 public: 562 // Accessors 563 static jboolean override(oop reflect); 564 static void set_override(oop reflect, jboolean value); 565 566 // Debugging 567 friend class JavaClasses; 568 }; 569 570 571 // Interface to java.lang.reflect.Method objects 572 573 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 574 private: 575 // Note that to reduce dependencies on the JDK we compute these 576 // offsets at run-time. 577 static int clazz_offset; 578 static int name_offset; 579 static int returnType_offset; 580 static int parameterTypes_offset; 581 static int exceptionTypes_offset; 582 static int slot_offset; 583 static int modifiers_offset; 584 static int signature_offset; 585 static int annotations_offset; 586 static int parameter_annotations_offset; 587 static int annotation_default_offset; 588 static int type_annotations_offset; 589 590 static void compute_offsets(); 591 592 public: 593 // Allocation 594 static Handle create(TRAPS); 595 596 // Accessors 597 static oop clazz(oop reflect); 598 static void set_clazz(oop reflect, oop value); 599 600 static oop name(oop method); 601 static void set_name(oop method, oop value); 602 603 static oop return_type(oop method); 604 static void set_return_type(oop method, oop value); 605 606 static oop parameter_types(oop method); 607 static void set_parameter_types(oop method, oop value); 608 609 static oop exception_types(oop method); 610 static void set_exception_types(oop method, oop value); 611 612 static int slot(oop reflect); 613 static void set_slot(oop reflect, int value); 614 615 static int modifiers(oop method); 616 static void set_modifiers(oop method, int value); 617 618 static bool has_signature_field(); 619 static oop signature(oop method); 620 static void set_signature(oop method, oop value); 621 622 static bool has_annotations_field(); 623 static oop annotations(oop method); 624 static void set_annotations(oop method, oop value); 625 626 static bool has_parameter_annotations_field(); 627 static oop parameter_annotations(oop method); 628 static void set_parameter_annotations(oop method, oop value); 629 630 static bool has_annotation_default_field(); 631 static oop annotation_default(oop method); 632 static void set_annotation_default(oop method, oop value); 633 634 static bool has_type_annotations_field(); 635 static oop type_annotations(oop method); 636 static void set_type_annotations(oop method, oop value); 637 638 // Debugging 639 friend class JavaClasses; 640 }; 641 642 643 // Interface to java.lang.reflect.Constructor objects 644 645 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 646 private: 647 // Note that to reduce dependencies on the JDK we compute these 648 // offsets at run-time. 649 static int clazz_offset; 650 static int parameterTypes_offset; 651 static int exceptionTypes_offset; 652 static int slot_offset; 653 static int modifiers_offset; 654 static int signature_offset; 655 static int annotations_offset; 656 static int parameter_annotations_offset; 657 static int type_annotations_offset; 658 659 static void compute_offsets(); 660 661 public: 662 // Allocation 663 static Handle create(TRAPS); 664 665 // Accessors 666 static oop clazz(oop reflect); 667 static void set_clazz(oop reflect, oop value); 668 669 static oop parameter_types(oop constructor); 670 static void set_parameter_types(oop constructor, oop value); 671 672 static oop exception_types(oop constructor); 673 static void set_exception_types(oop constructor, oop value); 674 675 static int slot(oop reflect); 676 static void set_slot(oop reflect, int value); 677 678 static int modifiers(oop constructor); 679 static void set_modifiers(oop constructor, int value); 680 681 static bool has_signature_field(); 682 static oop signature(oop constructor); 683 static void set_signature(oop constructor, oop value); 684 685 static bool has_annotations_field(); 686 static oop annotations(oop constructor); 687 static void set_annotations(oop constructor, oop value); 688 689 static bool has_parameter_annotations_field(); 690 static oop parameter_annotations(oop method); 691 static void set_parameter_annotations(oop method, oop value); 692 693 static bool has_type_annotations_field(); 694 static oop type_annotations(oop constructor); 695 static void set_type_annotations(oop constructor, oop value); 696 697 // Debugging 698 friend class JavaClasses; 699 }; 700 701 702 // Interface to java.lang.reflect.Field objects 703 704 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 705 private: 706 // Note that to reduce dependencies on the JDK we compute these 707 // offsets at run-time. 708 static int clazz_offset; 709 static int name_offset; 710 static int type_offset; 711 static int slot_offset; 712 static int modifiers_offset; 713 static int signature_offset; 714 static int annotations_offset; 715 static int type_annotations_offset; 716 717 static void compute_offsets(); 718 719 public: 720 // Allocation 721 static Handle create(TRAPS); 722 723 // Accessors 724 static oop clazz(oop reflect); 725 static void set_clazz(oop reflect, oop value); 726 727 static oop name(oop field); 728 static void set_name(oop field, oop value); 729 730 static oop type(oop field); 731 static void set_type(oop field, oop value); 732 733 static int slot(oop reflect); 734 static void set_slot(oop reflect, int value); 735 736 static int modifiers(oop field); 737 static void set_modifiers(oop field, int value); 738 739 static bool has_signature_field(); 740 static oop signature(oop constructor); 741 static void set_signature(oop constructor, oop value); 742 743 static bool has_annotations_field(); 744 static oop annotations(oop constructor); 745 static void set_annotations(oop constructor, oop value); 746 747 static bool has_parameter_annotations_field(); 748 static oop parameter_annotations(oop method); 749 static void set_parameter_annotations(oop method, oop value); 750 751 static bool has_annotation_default_field(); 752 static oop annotation_default(oop method); 753 static void set_annotation_default(oop method, oop value); 754 755 static bool has_type_annotations_field(); 756 static oop type_annotations(oop field); 757 static void set_type_annotations(oop field, oop value); 758 759 // Debugging 760 friend class JavaClasses; 761 }; 762 763 class java_lang_reflect_Parameter { 764 private: 765 // Note that to reduce dependencies on the JDK we compute these 766 // offsets at run-time. 767 static int name_offset; 768 static int modifiers_offset; 769 static int index_offset; 770 static int executable_offset; 771 772 static void compute_offsets(); 773 774 public: 775 // Allocation 776 static Handle create(TRAPS); 777 778 // Accessors 779 static oop name(oop field); 780 static void set_name(oop field, oop value); 781 782 static int index(oop reflect); 783 static void set_index(oop reflect, int value); 784 785 static int modifiers(oop reflect); 786 static void set_modifiers(oop reflect, int value); 787 788 static oop executable(oop constructor); 789 static void set_executable(oop constructor, oop value); 790 791 friend class JavaClasses; 792 }; 793 794 // Interface to sun.reflect.ConstantPool objects 795 class sun_reflect_ConstantPool { 796 private: 797 // Note that to reduce dependencies on the JDK we compute these 798 // offsets at run-time. 799 static int _oop_offset; 800 801 static void compute_offsets(); 802 803 public: 804 // Allocation 805 static Handle create(TRAPS); 806 807 // Accessors 808 static void set_cp(oop reflect, ConstantPool* value); 809 static int oop_offset() { 810 return _oop_offset; 811 } 812 813 static ConstantPool* get_cp(oop reflect); 814 815 // Debugging 816 friend class JavaClasses; 817 }; 818 819 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 820 class sun_reflect_UnsafeStaticFieldAccessorImpl { 821 private: 822 static int _base_offset; 823 static void compute_offsets(); 824 825 public: 826 static int base_offset() { 827 return _base_offset; 828 } 829 830 // Debugging 831 friend class JavaClasses; 832 }; 833 834 // Interface to java.lang primitive type boxing objects: 835 // - java.lang.Boolean 836 // - java.lang.Character 837 // - java.lang.Float 838 // - java.lang.Double 839 // - java.lang.Byte 840 // - java.lang.Short 841 // - java.lang.Integer 842 // - java.lang.Long 843 844 // This could be separated out into 8 individual classes. 845 846 class java_lang_boxing_object: AllStatic { 847 private: 848 enum { 849 hc_value_offset = 0 850 }; 851 static int value_offset; 852 static int long_value_offset; 853 854 static oop initialize_and_allocate(BasicType type, TRAPS); 855 public: 856 // Allocation. Returns a boxed value, or NULL for invalid type. 857 static oop create(BasicType type, jvalue* value, TRAPS); 858 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 859 static BasicType get_value(oop box, jvalue* value); 860 static BasicType set_value(oop box, jvalue* value); 861 static BasicType basic_type(oop box); 862 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 863 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 864 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 865 static void print(BasicType type, jvalue* value, outputStream* st); 866 867 static int value_offset_in_bytes(BasicType type) { 868 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 869 value_offset; 870 } 871 872 // Debugging 873 friend class JavaClasses; 874 }; 875 876 877 878 // Interface to java.lang.ref.Reference objects 879 880 class java_lang_ref_Reference: AllStatic { 881 public: 882 enum { 883 hc_referent_offset = 0, 884 hc_queue_offset = 1, 885 hc_next_offset = 2, 886 hc_discovered_offset = 3 // Is not last, see SoftRefs. 887 }; 888 enum { 889 hc_static_lock_offset = 0, 890 hc_static_pending_offset = 1 891 }; 892 893 static int referent_offset; 894 static int queue_offset; 895 static int next_offset; 896 static int discovered_offset; 897 static int static_lock_offset; 898 static int static_pending_offset; 899 static int number_of_fake_oop_fields; 900 901 // Accessors 902 static oop referent(oop ref) { 903 return ref->obj_field(referent_offset); 904 } 905 static void set_referent(oop ref, oop value) { 906 ref->obj_field_put(referent_offset, value); 907 } 908 static void set_referent_raw(oop ref, oop value) { 909 ref->obj_field_put_raw(referent_offset, value); 910 } 911 static HeapWord* referent_addr(oop ref) { 912 return ref->obj_field_addr<HeapWord>(referent_offset); 913 } 914 static oop next(oop ref) { 915 return ref->obj_field(next_offset); 916 } 917 static void set_next(oop ref, oop value) { 918 ref->obj_field_put(next_offset, value); 919 } 920 static void set_next_raw(oop ref, oop value) { 921 ref->obj_field_put_raw(next_offset, value); 922 } 923 static HeapWord* next_addr(oop ref) { 924 return ref->obj_field_addr<HeapWord>(next_offset); 925 } 926 static oop discovered(oop ref) { 927 return ref->obj_field(discovered_offset); 928 } 929 static void set_discovered(oop ref, oop value) { 930 ref->obj_field_put(discovered_offset, value); 931 } 932 static void set_discovered_raw(oop ref, oop value) { 933 ref->obj_field_put_raw(discovered_offset, value); 934 } 935 static HeapWord* discovered_addr(oop ref) { 936 return ref->obj_field_addr<HeapWord>(discovered_offset); 937 } 938 // Accessors for statics 939 static oop pending_list_lock(); 940 static oop pending_list(); 941 942 static HeapWord* pending_list_lock_addr(); 943 static HeapWord* pending_list_addr(); 944 }; 945 946 947 // Interface to java.lang.ref.SoftReference objects 948 949 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 950 public: 951 enum { 952 // The timestamp is a long field and may need to be adjusted for alignment. 953 hc_timestamp_offset = hc_discovered_offset + 1 954 }; 955 enum { 956 hc_static_clock_offset = 0 957 }; 958 959 static int timestamp_offset; 960 static int static_clock_offset; 961 962 // Accessors 963 static jlong timestamp(oop ref); 964 965 // Accessors for statics 966 static jlong clock(); 967 static void set_clock(jlong value); 968 }; 969 970 // Interface to java.lang.invoke.MethodHandle objects 971 972 class MethodHandleEntry; 973 974 class java_lang_invoke_MethodHandle: AllStatic { 975 friend class JavaClasses; 976 977 private: 978 static int _type_offset; // the MethodType of this MH 979 static int _form_offset; // the LambdaForm of this MH 980 981 static void compute_offsets(); 982 983 public: 984 // Accessors 985 static oop type(oop mh); 986 static void set_type(oop mh, oop mtype); 987 988 static oop form(oop mh); 989 static void set_form(oop mh, oop lform); 990 991 // Testers 992 static bool is_subclass(Klass* klass) { 993 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 994 } 995 static bool is_instance(oop obj); 996 997 // Accessors for code generation: 998 static int type_offset_in_bytes() { return _type_offset; } 999 static int form_offset_in_bytes() { return _form_offset; } 1000 }; 1001 1002 // Interface to java.lang.invoke.DirectMethodHandle objects 1003 1004 class java_lang_invoke_DirectMethodHandle: AllStatic { 1005 friend class JavaClasses; 1006 1007 private: 1008 static int _member_offset; // the MemberName of this DMH 1009 1010 static void compute_offsets(); 1011 1012 public: 1013 // Accessors 1014 static oop member(oop mh); 1015 1016 // Testers 1017 static bool is_subclass(Klass* klass) { 1018 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 1019 } 1020 static bool is_instance(oop obj); 1021 1022 // Accessors for code generation: 1023 static int member_offset_in_bytes() { return _member_offset; } 1024 }; 1025 1026 // Interface to java.lang.invoke.LambdaForm objects 1027 // (These are a private interface for managing adapter code generation.) 1028 1029 class java_lang_invoke_LambdaForm: AllStatic { 1030 friend class JavaClasses; 1031 1032 private: 1033 static int _vmentry_offset; // type is MemberName 1034 1035 static void compute_offsets(); 1036 1037 public: 1038 // Accessors 1039 static oop vmentry(oop lform); 1040 static void set_vmentry(oop lform, oop invoker); 1041 1042 // Testers 1043 static bool is_subclass(Klass* klass) { 1044 return SystemDictionary::LambdaForm_klass() != NULL && 1045 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1046 } 1047 static bool is_instance(oop obj); 1048 1049 // Accessors for code generation: 1050 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1051 }; 1052 1053 1054 // Interface to java.lang.invoke.MemberName objects 1055 // (These are a private interface for Java code to query the class hierarchy.) 1056 1057 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1058 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1059 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1060 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1061 1062 class java_lang_invoke_MemberName: AllStatic { 1063 friend class JavaClasses; 1064 1065 private: 1066 // From java.lang.invoke.MemberName: 1067 // private Class<?> clazz; // class in which the method is defined 1068 // private String name; // may be null if not yet materialized 1069 // private Object type; // may be null if not yet materialized 1070 // private int flags; // modifier bits; see reflect.Modifier 1071 // private intptr vmtarget; // VM-specific target value 1072 // private intptr_t vmindex; // member index within class or interface 1073 static int _clazz_offset; 1074 static int _name_offset; 1075 static int _type_offset; 1076 static int _flags_offset; 1077 static int _vmtarget_offset; 1078 static int _vmloader_offset; 1079 static int _vmindex_offset; 1080 1081 static void compute_offsets(); 1082 1083 public: 1084 // Accessors 1085 static oop clazz(oop mname); 1086 static void set_clazz(oop mname, oop clazz); 1087 1088 static oop type(oop mname); 1089 static void set_type(oop mname, oop type); 1090 1091 static oop name(oop mname); 1092 static void set_name(oop mname, oop name); 1093 1094 static int flags(oop mname); 1095 static void set_flags(oop mname, int flags); 1096 1097 static Metadata* vmtarget(oop mname); 1098 static void set_vmtarget(oop mname, Metadata* target); 1099 1100 static intptr_t vmindex(oop mname); 1101 static void set_vmindex(oop mname, intptr_t index); 1102 1103 // Testers 1104 static bool is_subclass(Klass* klass) { 1105 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1106 } 1107 static bool is_instance(oop obj); 1108 1109 static bool is_method(oop obj); 1110 1111 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1112 enum { 1113 MN_IS_METHOD = 0x00010000, // method (not constructor) 1114 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1115 MN_IS_FIELD = 0x00040000, // field 1116 MN_IS_TYPE = 0x00080000, // nested type 1117 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1118 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1119 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1120 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1121 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1122 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1123 }; 1124 1125 // Accessors for code generation: 1126 static int clazz_offset_in_bytes() { return _clazz_offset; } 1127 static int type_offset_in_bytes() { return _type_offset; } 1128 static int name_offset_in_bytes() { return _name_offset; } 1129 static int flags_offset_in_bytes() { return _flags_offset; } 1130 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1131 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1132 }; 1133 1134 1135 // Interface to java.lang.invoke.MethodType objects 1136 1137 class java_lang_invoke_MethodType: AllStatic { 1138 friend class JavaClasses; 1139 1140 private: 1141 static int _rtype_offset; 1142 static int _ptypes_offset; 1143 1144 static void compute_offsets(); 1145 1146 public: 1147 // Accessors 1148 static oop rtype(oop mt); 1149 static objArrayOop ptypes(oop mt); 1150 1151 static oop ptype(oop mt, int index); 1152 static int ptype_count(oop mt); 1153 1154 static int ptype_slot_count(oop mt); // extra counts for long/double 1155 static int rtype_slot_count(oop mt); // extra counts for long/double 1156 1157 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1158 static void print_signature(oop mt, outputStream* st); 1159 1160 static bool is_instance(oop obj); 1161 1162 static bool equals(oop mt1, oop mt2); 1163 1164 // Accessors for code generation: 1165 static int rtype_offset_in_bytes() { return _rtype_offset; } 1166 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1167 }; 1168 1169 1170 // Interface to java.lang.invoke.CallSite objects 1171 1172 class java_lang_invoke_CallSite: AllStatic { 1173 friend class JavaClasses; 1174 1175 private: 1176 static int _target_offset; 1177 static int _context_offset; 1178 1179 static void compute_offsets(); 1180 1181 public: 1182 // Accessors 1183 static oop target( oop site); 1184 static void set_target( oop site, oop target); 1185 static void set_target_volatile( oop site, oop target); 1186 1187 static oop context(oop site); 1188 1189 // Testers 1190 static bool is_subclass(Klass* klass) { 1191 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1192 } 1193 static bool is_instance(oop obj); 1194 1195 // Accessors for code generation: 1196 static int target_offset_in_bytes() { return _target_offset; } 1197 }; 1198 1199 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1200 1201 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1202 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1203 1204 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1205 friend class JavaClasses; 1206 1207 private: 1208 static int _vmdependencies_offset; 1209 1210 static void compute_offsets(); 1211 1212 public: 1213 // Accessors 1214 static nmethodBucket* vmdependencies(oop context); 1215 static void set_vmdependencies(oop context, nmethodBucket* bucket); 1216 1217 // Testers 1218 static bool is_subclass(Klass* klass) { 1219 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1220 } 1221 static bool is_instance(oop obj); 1222 }; 1223 1224 // Interface to java.security.AccessControlContext objects 1225 1226 class java_security_AccessControlContext: AllStatic { 1227 private: 1228 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1229 // so we compute the offsets at startup rather than hard-wiring them. 1230 static int _context_offset; 1231 static int _privilegedContext_offset; 1232 static int _isPrivileged_offset; 1233 static int _isAuthorized_offset; 1234 1235 static void compute_offsets(); 1236 public: 1237 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1238 1239 static bool is_authorized(Handle context); 1240 1241 // Debugging/initialization 1242 friend class JavaClasses; 1243 }; 1244 1245 1246 // Interface to java.lang.ClassLoader objects 1247 1248 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1249 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1250 1251 class java_lang_ClassLoader : AllStatic { 1252 private: 1253 // The fake offsets are added by the class loader when java.lang.Class is loaded 1254 enum { 1255 hc_parent_offset = 0 1256 }; 1257 static int _loader_data_offset; 1258 static bool offsets_computed; 1259 static int parent_offset; 1260 static int parallelCapable_offset; 1261 1262 public: 1263 static void compute_offsets(); 1264 1265 static ClassLoaderData** loader_data_addr(oop loader); 1266 static ClassLoaderData* loader_data(oop loader); 1267 1268 static oop parent(oop loader); 1269 static bool isAncestor(oop loader, oop cl); 1270 1271 // Support for parallelCapable field 1272 static bool parallelCapable(oop the_class_mirror); 1273 1274 static bool is_trusted_loader(oop loader); 1275 1276 // Fix for 4474172 1277 static oop non_reflection_class_loader(oop loader); 1278 1279 // Testers 1280 static bool is_subclass(Klass* klass) { 1281 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1282 } 1283 static bool is_instance(oop obj); 1284 1285 // Debugging 1286 friend class JavaClasses; 1287 friend class ClassFileParser; // access to number_of_fake_fields 1288 }; 1289 1290 1291 // Interface to java.lang.System objects 1292 1293 class java_lang_System : AllStatic { 1294 private: 1295 enum { 1296 hc_static_in_offset = 0, 1297 hc_static_out_offset = 1, 1298 hc_static_err_offset = 2, 1299 hc_static_security_offset = 3 1300 }; 1301 1302 static int static_in_offset; 1303 static int static_out_offset; 1304 static int static_err_offset; 1305 static int static_security_offset; 1306 1307 public: 1308 static int in_offset_in_bytes(); 1309 static int out_offset_in_bytes(); 1310 static int err_offset_in_bytes(); 1311 1312 static bool has_security_manager(); 1313 1314 // Debugging 1315 friend class JavaClasses; 1316 }; 1317 1318 1319 // Interface to java.lang.StackTraceElement objects 1320 1321 class java_lang_StackTraceElement: AllStatic { 1322 private: 1323 enum { 1324 hc_declaringClass_offset = 0, 1325 hc_methodName_offset = 1, 1326 hc_fileName_offset = 2, 1327 hc_lineNumber_offset = 3 1328 }; 1329 1330 static int declaringClass_offset; 1331 static int methodName_offset; 1332 static int fileName_offset; 1333 static int lineNumber_offset; 1334 1335 public: 1336 // Setters 1337 static void set_declaringClass(oop element, oop value); 1338 static void set_methodName(oop element, oop value); 1339 static void set_fileName(oop element, oop value); 1340 static void set_lineNumber(oop element, int value); 1341 1342 // Create an instance of StackTraceElement 1343 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS); 1344 static oop create(methodHandle method, int bci, TRAPS); 1345 1346 // Debugging 1347 friend class JavaClasses; 1348 }; 1349 1350 1351 // Interface to java.lang.AssertionStatusDirectives objects 1352 1353 class java_lang_AssertionStatusDirectives: AllStatic { 1354 private: 1355 enum { 1356 hc_classes_offset, 1357 hc_classEnabled_offset, 1358 hc_packages_offset, 1359 hc_packageEnabled_offset, 1360 hc_deflt_offset 1361 }; 1362 1363 static int classes_offset; 1364 static int classEnabled_offset; 1365 static int packages_offset; 1366 static int packageEnabled_offset; 1367 static int deflt_offset; 1368 1369 public: 1370 // Setters 1371 static void set_classes(oop obj, oop val); 1372 static void set_classEnabled(oop obj, oop val); 1373 static void set_packages(oop obj, oop val); 1374 static void set_packageEnabled(oop obj, oop val); 1375 static void set_deflt(oop obj, bool val); 1376 // Debugging 1377 friend class JavaClasses; 1378 }; 1379 1380 1381 class java_nio_Buffer: AllStatic { 1382 private: 1383 static int _limit_offset; 1384 1385 public: 1386 static int limit_offset(); 1387 static void compute_offsets(); 1388 }; 1389 1390 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1391 private: 1392 static int _owner_offset; 1393 public: 1394 static void initialize(TRAPS); 1395 static oop get_owner_threadObj(oop obj); 1396 }; 1397 1398 // Use to declare fields that need to be injected into Java classes 1399 // for the JVM to use. The name_index and signature_index are 1400 // declared in vmSymbols. The may_be_java flag is used to declare 1401 // fields that might already exist in Java but should be injected if 1402 // they don't. Otherwise the field is unconditionally injected and 1403 // the JVM uses the injected one. This is to ensure that name 1404 // collisions don't occur. In general may_be_java should be false 1405 // unless there's a good reason. 1406 1407 class InjectedField { 1408 public: 1409 const SystemDictionary::WKID klass_id; 1410 const vmSymbols::SID name_index; 1411 const vmSymbols::SID signature_index; 1412 const bool may_be_java; 1413 1414 1415 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1416 Symbol* name() const { return lookup_symbol(name_index); } 1417 Symbol* signature() const { return lookup_symbol(signature_index); } 1418 1419 int compute_offset(); 1420 1421 // Find the Symbol for this index 1422 static Symbol* lookup_symbol(int symbol_index) { 1423 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1424 } 1425 }; 1426 1427 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1428 klass##_##name##_enum, 1429 1430 #define ALL_INJECTED_FIELDS(macro) \ 1431 CLASS_INJECTED_FIELDS(macro) \ 1432 CLASSLOADER_INJECTED_FIELDS(macro) \ 1433 MEMBERNAME_INJECTED_FIELDS(macro) \ 1434 CALLSITECONTEXT_INJECTED_FIELDS(macro) 1435 1436 // Interface to hard-coded offset checking 1437 1438 class JavaClasses : AllStatic { 1439 private: 1440 1441 static InjectedField _injected_fields[]; 1442 1443 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1444 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1445 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1446 1447 public: 1448 enum InjectedFieldID { 1449 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1450 MAX_enum 1451 }; 1452 1453 static int compute_injected_offset(InjectedFieldID id); 1454 1455 static void compute_hard_coded_offsets(); 1456 static void compute_offsets(); 1457 static void check_offsets() PRODUCT_RETURN; 1458 1459 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1460 }; 1461 1462 #undef DECLARE_INJECTED_FIELD_ENUM 1463 1464 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP