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 typeArrayOop value_array = ((typeArrayOop)java_string->obj_field(value_offset)); 161 if (value_array == NULL) { 162 return 0; 163 } else { 164 return value_array->length(); 165 } 166 } 167 } 168 static int utf8_length(oop java_string); 169 170 // String converters 171 static char* as_utf8_string(oop java_string); 172 static char* as_utf8_string(oop java_string, char* buf, int buflen); 173 static char* as_utf8_string(oop java_string, int start, int len); 174 static char* as_utf8_string(oop java_string, int start, int len, char* buf, int buflen); 175 static char* as_platform_dependent_str(Handle java_string, TRAPS); 176 static jchar* as_unicode_string(oop java_string, int& length, TRAPS); 177 // produce an ascii string with all other values quoted using \u#### 178 static char* as_quoted_ascii(oop java_string); 179 180 // Compute the hash value for a java.lang.String object which would 181 // contain the characters passed in. 182 // 183 // As the hash value used by the String object itself, in 184 // String.hashCode(). This value is normally calculated in Java code 185 // in the String.hashCode method(), but is precomputed for String 186 // objects in the shared archive file. 187 // hash P(31) from Kernighan & Ritchie 188 // 189 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 190 template <typename T> static unsigned int hash_code(T* s, int len) { 191 unsigned int h = 0; 192 while (len-- > 0) { 193 h = 31*h + (unsigned int) *s; 194 s++; 195 } 196 return h; 197 } 198 static unsigned int hash_code(oop java_string); 199 200 // This is the string hash code used by the StringTable, which may be 201 // the same as String.hashCode or an alternate hash code. 202 static unsigned int hash_string(oop java_string); 203 204 static bool equals(oop java_string, jchar* chars, int len); 205 static bool equals(oop str1, oop str2); 206 207 // Conversion between '.' and '/' formats 208 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 209 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 210 211 // Conversion 212 static Symbol* as_symbol(Handle java_string, TRAPS); 213 static Symbol* as_symbol_or_null(oop java_string); 214 215 // Testers 216 static bool is_instance(oop obj); 217 static bool is_instance_inlined(oop obj); 218 219 // Debugging 220 static void print(oop java_string, outputStream* st); 221 friend class JavaClasses; 222 friend class StringTable; 223 }; 224 225 226 // Interface to java.lang.Class objects 227 228 #define CLASS_INJECTED_FIELDS(macro) \ 229 macro(java_lang_Class, klass, intptr_signature, false) \ 230 macro(java_lang_Class, array_klass, intptr_signature, false) \ 231 macro(java_lang_Class, oop_size, int_signature, false) \ 232 macro(java_lang_Class, static_oop_field_count, int_signature, false) \ 233 macro(java_lang_Class, protection_domain, object_signature, false) \ 234 macro(java_lang_Class, signers, object_signature, false) 235 236 class java_lang_Class : AllStatic { 237 friend class VMStructs; 238 239 private: 240 // The fake offsets are added by the class loader when java.lang.Class is loaded 241 242 static int _klass_offset; 243 static int _array_klass_offset; 244 245 static int _oop_size_offset; 246 static int _static_oop_field_count_offset; 247 248 static int _protection_domain_offset; 249 static int _init_lock_offset; 250 static int _signers_offset; 251 static int _class_loader_offset; 252 static int _component_mirror_offset; 253 254 static bool offsets_computed; 255 static int classRedefinedCount_offset; 256 257 static GrowableArray<Klass*>* _fixup_mirror_list; 258 259 static void set_init_lock(oop java_class, oop init_lock); 260 static void set_protection_domain(oop java_class, oop protection_domain); 261 static void set_class_loader(oop java_class, oop class_loader); 262 static void set_component_mirror(oop java_class, oop comp_mirror); 263 static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS); 264 public: 265 static void compute_offsets(); 266 267 // Instance creation 268 static void create_mirror(KlassHandle k, Handle class_loader, 269 Handle protection_domain, TRAPS); 270 static void fixup_mirror(KlassHandle k, TRAPS); 271 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 272 // Conversion 273 static Klass* as_Klass(oop java_class); 274 static void set_klass(oop java_class, Klass* klass); 275 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 276 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 277 Klass* refk_oop = NULL; 278 BasicType result = as_BasicType(java_class, &refk_oop); 279 (*reference_klass) = KlassHandle(refk_oop); 280 return result; 281 } 282 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 283 static void print_signature(oop java_class, outputStream *st); 284 static const char* as_external_name(oop java_class); 285 // Testing 286 static bool is_instance(oop obj); 287 288 static bool is_primitive(oop java_class); 289 static BasicType primitive_type(oop java_class); 290 static oop primitive_mirror(BasicType t); 291 // JVM_NewArray support 292 static Klass* array_klass(oop java_class); 293 static void set_array_klass(oop java_class, Klass* klass); 294 // compiler support for class operations 295 static int klass_offset_in_bytes() { return _klass_offset; } 296 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 297 // Support for classRedefinedCount field 298 static int classRedefinedCount(oop the_class_mirror); 299 static void set_classRedefinedCount(oop the_class_mirror, int value); 300 301 // Support for embedded per-class oops 302 static oop protection_domain(oop java_class); 303 static oop init_lock(oop java_class); 304 static oop component_mirror(oop java_class); 305 static objArrayOop signers(oop java_class); 306 static void set_signers(oop java_class, objArrayOop signers); 307 308 static oop class_loader(oop java_class); 309 310 static int oop_size(oop java_class); 311 static void set_oop_size(oop java_class, int size); 312 static int static_oop_field_count(oop java_class); 313 static void set_static_oop_field_count(oop java_class, int size); 314 315 static GrowableArray<Klass*>* fixup_mirror_list() { 316 return _fixup_mirror_list; 317 } 318 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 319 _fixup_mirror_list = v; 320 } 321 // Debugging 322 friend class JavaClasses; 323 friend class InstanceKlass; // verification code accesses offsets 324 friend class ClassFileParser; // access to number_of_fake_fields 325 }; 326 327 // Interface to java.lang.Thread objects 328 329 class java_lang_Thread : AllStatic { 330 private: 331 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 332 // so we compute the offsets at startup rather than hard-wiring them. 333 static int _name_offset; 334 static int _group_offset; 335 static int _contextClassLoader_offset; 336 static int _inheritedAccessControlContext_offset; 337 static int _priority_offset; 338 static int _eetop_offset; 339 static int _daemon_offset; 340 static int _stillborn_offset; 341 static int _stackSize_offset; 342 static int _tid_offset; 343 static int _thread_status_offset; 344 static int _park_blocker_offset; 345 static int _park_event_offset ; 346 347 static void compute_offsets(); 348 349 public: 350 // Instance creation 351 static oop create(); 352 // Returns the JavaThread associated with the thread obj 353 static JavaThread* thread(oop java_thread); 354 // Set JavaThread for instance 355 static void set_thread(oop java_thread, JavaThread* thread); 356 // Name 357 static oop name(oop java_thread); 358 static void set_name(oop java_thread, oop name); 359 // Priority 360 static ThreadPriority priority(oop java_thread); 361 static void set_priority(oop java_thread, ThreadPriority priority); 362 // Thread group 363 static oop threadGroup(oop java_thread); 364 // Stillborn 365 static bool is_stillborn(oop java_thread); 366 static void set_stillborn(oop java_thread); 367 // Alive (NOTE: this is not really a field, but provides the correct 368 // definition without doing a Java call) 369 static bool is_alive(oop java_thread); 370 // Daemon 371 static bool is_daemon(oop java_thread); 372 static void set_daemon(oop java_thread); 373 // Context ClassLoader 374 static oop context_class_loader(oop java_thread); 375 // Control context 376 static oop inherited_access_control_context(oop java_thread); 377 // Stack size hint 378 static jlong stackSize(oop java_thread); 379 // Thread ID 380 static jlong thread_id(oop java_thread); 381 382 // Blocker object responsible for thread parking 383 static oop park_blocker(oop java_thread); 384 385 // Pointer to type-stable park handler, encoded as jlong. 386 // Should be set when apparently null 387 // For details, see unsafe.cpp Unsafe_Unpark 388 static jlong park_event(oop java_thread); 389 static bool set_park_event(oop java_thread, jlong ptr); 390 391 // Java Thread Status for JVMTI and M&M use. 392 // This thread status info is saved in threadStatus field of 393 // java.lang.Thread java class. 394 enum ThreadStatus { 395 NEW = 0, 396 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 397 JVMTI_THREAD_STATE_RUNNABLE, 398 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 399 JVMTI_THREAD_STATE_WAITING + 400 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 401 JVMTI_THREAD_STATE_SLEEPING, 402 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 403 JVMTI_THREAD_STATE_WAITING + 404 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 405 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 406 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 407 JVMTI_THREAD_STATE_WAITING + 408 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 409 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 410 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 411 JVMTI_THREAD_STATE_WAITING + 412 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 413 JVMTI_THREAD_STATE_PARKED, 414 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 415 JVMTI_THREAD_STATE_WAITING + 416 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 417 JVMTI_THREAD_STATE_PARKED, 418 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 419 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 420 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 421 }; 422 // Write thread status info to threadStatus field of java.lang.Thread. 423 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 424 // Read thread status info from threadStatus field of java.lang.Thread. 425 static ThreadStatus get_thread_status(oop java_thread_oop); 426 427 static const char* thread_status_name(oop java_thread_oop); 428 429 // Debugging 430 friend class JavaClasses; 431 }; 432 433 // Interface to java.lang.ThreadGroup objects 434 435 class java_lang_ThreadGroup : AllStatic { 436 private: 437 static int _parent_offset; 438 static int _name_offset; 439 static int _threads_offset; 440 static int _groups_offset; 441 static int _maxPriority_offset; 442 static int _destroyed_offset; 443 static int _daemon_offset; 444 static int _vmAllowSuspension_offset; 445 static int _nthreads_offset; 446 static int _ngroups_offset; 447 448 static void compute_offsets(); 449 450 public: 451 // parent ThreadGroup 452 static oop parent(oop java_thread_group); 453 // name 454 static typeArrayOop name(oop java_thread_group); 455 // ("name as oop" accessor is not necessary) 456 // Number of threads in group 457 static int nthreads(oop java_thread_group); 458 // threads 459 static objArrayOop threads(oop java_thread_group); 460 // Number of threads in group 461 static int ngroups(oop java_thread_group); 462 // groups 463 static objArrayOop groups(oop java_thread_group); 464 // maxPriority in group 465 static ThreadPriority maxPriority(oop java_thread_group); 466 // Destroyed 467 static bool is_destroyed(oop java_thread_group); 468 // Daemon 469 static bool is_daemon(oop java_thread_group); 470 // vmAllowSuspension 471 static bool is_vmAllowSuspension(oop java_thread_group); 472 // Debugging 473 friend class JavaClasses; 474 }; 475 476 477 478 // Interface to java.lang.Throwable objects 479 480 class java_lang_Throwable: AllStatic { 481 friend class BacktraceBuilder; 482 483 private: 484 // Offsets 485 enum { 486 hc_backtrace_offset = 0, 487 hc_detailMessage_offset = 1, 488 hc_cause_offset = 2, // New since 1.4 489 hc_stackTrace_offset = 3 // New since 1.4 490 }; 491 enum { 492 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 493 }; 494 // Trace constants 495 enum { 496 trace_methods_offset = 0, 497 trace_bcis_offset = 1, 498 trace_mirrors_offset = 2, 499 trace_cprefs_offset = 3, 500 trace_next_offset = 4, 501 trace_size = 5, 502 trace_chunk_size = 32 503 }; 504 505 static int backtrace_offset; 506 static int detailMessage_offset; 507 static int cause_offset; 508 static int stackTrace_offset; 509 static int static_unassigned_stacktrace_offset; 510 511 // Printing 512 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref); 513 // StackTrace (programmatic access, new since 1.4) 514 static void clear_stacktrace(oop throwable); 515 // No stack trace available 516 static const char* no_stack_trace_message(); 517 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 518 static void set_stacktrace(oop throwable, oop st_element_array); 519 static oop unassigned_stacktrace(); 520 521 public: 522 // Backtrace 523 static oop backtrace(oop throwable); 524 static void set_backtrace(oop throwable, oop value); 525 // Needed by JVMTI to filter out this internal field. 526 static int get_backtrace_offset() { return backtrace_offset;} 527 static int get_detailMessage_offset() { return detailMessage_offset;} 528 // Message 529 static oop message(oop throwable); 530 static oop message(Handle throwable); 531 static void set_message(oop throwable, oop value); 532 static Symbol* detail_message(oop throwable); 533 static void print_stack_element(outputStream *st, Handle mirror, int method, 534 int version, int bci, int cpref); 535 static void print_stack_element(outputStream *st, methodHandle method, int bci); 536 static void print_stack_usage(Handle stream); 537 538 // Allocate space for backtrace (created but stack trace not filled in) 539 static void allocate_backtrace(Handle throwable, TRAPS); 540 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 541 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 542 // Fill in current stack trace, can cause GC 543 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS); 544 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle()); 545 // Programmatic access to stack trace 546 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 547 static int get_stack_trace_depth(oop throwable, TRAPS); 548 // Printing 549 static void print(oop throwable, outputStream* st); 550 static void print(Handle throwable, outputStream* st); 551 static void print_stack_trace(oop throwable, outputStream* st); 552 // Debugging 553 friend class JavaClasses; 554 }; 555 556 557 // Interface to java.lang.reflect.AccessibleObject objects 558 559 class java_lang_reflect_AccessibleObject: AllStatic { 560 private: 561 // Note that to reduce dependencies on the JDK we compute these 562 // offsets at run-time. 563 static int override_offset; 564 565 static void compute_offsets(); 566 567 public: 568 // Accessors 569 static jboolean override(oop reflect); 570 static void set_override(oop reflect, jboolean value); 571 572 // Debugging 573 friend class JavaClasses; 574 }; 575 576 577 // Interface to java.lang.reflect.Method objects 578 579 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 580 private: 581 // Note that to reduce dependencies on the JDK we compute these 582 // offsets at run-time. 583 static int clazz_offset; 584 static int name_offset; 585 static int returnType_offset; 586 static int parameterTypes_offset; 587 static int exceptionTypes_offset; 588 static int slot_offset; 589 static int modifiers_offset; 590 static int signature_offset; 591 static int annotations_offset; 592 static int parameter_annotations_offset; 593 static int annotation_default_offset; 594 static int type_annotations_offset; 595 596 static void compute_offsets(); 597 598 public: 599 // Allocation 600 static Handle create(TRAPS); 601 602 // Accessors 603 static oop clazz(oop reflect); 604 static void set_clazz(oop reflect, oop value); 605 606 static oop name(oop method); 607 static void set_name(oop method, oop value); 608 609 static oop return_type(oop method); 610 static void set_return_type(oop method, oop value); 611 612 static oop parameter_types(oop method); 613 static void set_parameter_types(oop method, oop value); 614 615 static oop exception_types(oop method); 616 static void set_exception_types(oop method, oop value); 617 618 static int slot(oop reflect); 619 static void set_slot(oop reflect, int value); 620 621 static int modifiers(oop method); 622 static void set_modifiers(oop method, int value); 623 624 static bool has_signature_field(); 625 static oop signature(oop method); 626 static void set_signature(oop method, oop value); 627 628 static bool has_annotations_field(); 629 static oop annotations(oop method); 630 static void set_annotations(oop method, oop value); 631 632 static bool has_parameter_annotations_field(); 633 static oop parameter_annotations(oop method); 634 static void set_parameter_annotations(oop method, oop value); 635 636 static bool has_annotation_default_field(); 637 static oop annotation_default(oop method); 638 static void set_annotation_default(oop method, oop value); 639 640 static bool has_type_annotations_field(); 641 static oop type_annotations(oop method); 642 static void set_type_annotations(oop method, oop value); 643 644 // Debugging 645 friend class JavaClasses; 646 }; 647 648 649 // Interface to java.lang.reflect.Constructor objects 650 651 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 652 private: 653 // Note that to reduce dependencies on the JDK we compute these 654 // offsets at run-time. 655 static int clazz_offset; 656 static int parameterTypes_offset; 657 static int exceptionTypes_offset; 658 static int slot_offset; 659 static int modifiers_offset; 660 static int signature_offset; 661 static int annotations_offset; 662 static int parameter_annotations_offset; 663 static int type_annotations_offset; 664 665 static void compute_offsets(); 666 667 public: 668 // Allocation 669 static Handle create(TRAPS); 670 671 // Accessors 672 static oop clazz(oop reflect); 673 static void set_clazz(oop reflect, oop value); 674 675 static oop parameter_types(oop constructor); 676 static void set_parameter_types(oop constructor, oop value); 677 678 static oop exception_types(oop constructor); 679 static void set_exception_types(oop constructor, oop value); 680 681 static int slot(oop reflect); 682 static void set_slot(oop reflect, int value); 683 684 static int modifiers(oop constructor); 685 static void set_modifiers(oop constructor, int value); 686 687 static bool has_signature_field(); 688 static oop signature(oop constructor); 689 static void set_signature(oop constructor, oop value); 690 691 static bool has_annotations_field(); 692 static oop annotations(oop constructor); 693 static void set_annotations(oop constructor, oop value); 694 695 static bool has_parameter_annotations_field(); 696 static oop parameter_annotations(oop method); 697 static void set_parameter_annotations(oop method, oop value); 698 699 static bool has_type_annotations_field(); 700 static oop type_annotations(oop constructor); 701 static void set_type_annotations(oop constructor, oop value); 702 703 // Debugging 704 friend class JavaClasses; 705 }; 706 707 708 // Interface to java.lang.reflect.Field objects 709 710 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 711 private: 712 // Note that to reduce dependencies on the JDK we compute these 713 // offsets at run-time. 714 static int clazz_offset; 715 static int name_offset; 716 static int type_offset; 717 static int slot_offset; 718 static int modifiers_offset; 719 static int signature_offset; 720 static int annotations_offset; 721 static int type_annotations_offset; 722 723 static void compute_offsets(); 724 725 public: 726 // Allocation 727 static Handle create(TRAPS); 728 729 // Accessors 730 static oop clazz(oop reflect); 731 static void set_clazz(oop reflect, oop value); 732 733 static oop name(oop field); 734 static void set_name(oop field, oop value); 735 736 static oop type(oop field); 737 static void set_type(oop field, oop value); 738 739 static int slot(oop reflect); 740 static void set_slot(oop reflect, int value); 741 742 static int modifiers(oop field); 743 static void set_modifiers(oop field, int value); 744 745 static bool has_signature_field(); 746 static oop signature(oop constructor); 747 static void set_signature(oop constructor, oop value); 748 749 static bool has_annotations_field(); 750 static oop annotations(oop constructor); 751 static void set_annotations(oop constructor, oop value); 752 753 static bool has_parameter_annotations_field(); 754 static oop parameter_annotations(oop method); 755 static void set_parameter_annotations(oop method, oop value); 756 757 static bool has_annotation_default_field(); 758 static oop annotation_default(oop method); 759 static void set_annotation_default(oop method, oop value); 760 761 static bool has_type_annotations_field(); 762 static oop type_annotations(oop field); 763 static void set_type_annotations(oop field, oop value); 764 765 // Debugging 766 friend class JavaClasses; 767 }; 768 769 class java_lang_reflect_Parameter { 770 private: 771 // Note that to reduce dependencies on the JDK we compute these 772 // offsets at run-time. 773 static int name_offset; 774 static int modifiers_offset; 775 static int index_offset; 776 static int executable_offset; 777 778 static void compute_offsets(); 779 780 public: 781 // Allocation 782 static Handle create(TRAPS); 783 784 // Accessors 785 static oop name(oop field); 786 static void set_name(oop field, oop value); 787 788 static int index(oop reflect); 789 static void set_index(oop reflect, int value); 790 791 static int modifiers(oop reflect); 792 static void set_modifiers(oop reflect, int value); 793 794 static oop executable(oop constructor); 795 static void set_executable(oop constructor, oop value); 796 797 friend class JavaClasses; 798 }; 799 800 // Interface to sun.reflect.ConstantPool objects 801 class sun_reflect_ConstantPool { 802 private: 803 // Note that to reduce dependencies on the JDK we compute these 804 // offsets at run-time. 805 static int _oop_offset; 806 807 static void compute_offsets(); 808 809 public: 810 // Allocation 811 static Handle create(TRAPS); 812 813 // Accessors 814 static void set_cp(oop reflect, ConstantPool* value); 815 static int oop_offset() { 816 return _oop_offset; 817 } 818 819 static ConstantPool* get_cp(oop reflect); 820 821 // Debugging 822 friend class JavaClasses; 823 }; 824 825 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 826 class sun_reflect_UnsafeStaticFieldAccessorImpl { 827 private: 828 static int _base_offset; 829 static void compute_offsets(); 830 831 public: 832 static int base_offset() { 833 return _base_offset; 834 } 835 836 // Debugging 837 friend class JavaClasses; 838 }; 839 840 // Interface to java.lang primitive type boxing objects: 841 // - java.lang.Boolean 842 // - java.lang.Character 843 // - java.lang.Float 844 // - java.lang.Double 845 // - java.lang.Byte 846 // - java.lang.Short 847 // - java.lang.Integer 848 // - java.lang.Long 849 850 // This could be separated out into 8 individual classes. 851 852 class java_lang_boxing_object: AllStatic { 853 private: 854 enum { 855 hc_value_offset = 0 856 }; 857 static int value_offset; 858 static int long_value_offset; 859 860 static oop initialize_and_allocate(BasicType type, TRAPS); 861 public: 862 // Allocation. Returns a boxed value, or NULL for invalid type. 863 static oop create(BasicType type, jvalue* value, TRAPS); 864 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 865 static BasicType get_value(oop box, jvalue* value); 866 static BasicType set_value(oop box, jvalue* value); 867 static BasicType basic_type(oop box); 868 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 869 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 870 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 871 static void print(BasicType type, jvalue* value, outputStream* st); 872 873 static int value_offset_in_bytes(BasicType type) { 874 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 875 value_offset; 876 } 877 878 // Debugging 879 friend class JavaClasses; 880 }; 881 882 883 884 // Interface to java.lang.ref.Reference objects 885 886 class java_lang_ref_Reference: AllStatic { 887 public: 888 enum { 889 hc_referent_offset = 0, 890 hc_queue_offset = 1, 891 hc_next_offset = 2, 892 hc_discovered_offset = 3 // Is not last, see SoftRefs. 893 }; 894 enum { 895 hc_static_lock_offset = 0, 896 hc_static_pending_offset = 1 897 }; 898 899 static int referent_offset; 900 static int queue_offset; 901 static int next_offset; 902 static int discovered_offset; 903 static int static_lock_offset; 904 static int static_pending_offset; 905 static int number_of_fake_oop_fields; 906 907 // Accessors 908 static oop referent(oop ref) { 909 return ref->obj_field(referent_offset); 910 } 911 static void set_referent(oop ref, oop value) { 912 ref->obj_field_put(referent_offset, value); 913 } 914 static void set_referent_raw(oop ref, oop value) { 915 ref->obj_field_put_raw(referent_offset, value); 916 } 917 static HeapWord* referent_addr(oop ref) { 918 return ref->obj_field_addr<HeapWord>(referent_offset); 919 } 920 static oop next(oop ref) { 921 return ref->obj_field(next_offset); 922 } 923 static void set_next(oop ref, oop value) { 924 ref->obj_field_put(next_offset, value); 925 } 926 static void set_next_raw(oop ref, oop value) { 927 ref->obj_field_put_raw(next_offset, value); 928 } 929 static HeapWord* next_addr(oop ref) { 930 return ref->obj_field_addr<HeapWord>(next_offset); 931 } 932 static oop discovered(oop ref) { 933 return ref->obj_field(discovered_offset); 934 } 935 static void set_discovered(oop ref, oop value) { 936 ref->obj_field_put(discovered_offset, value); 937 } 938 static void set_discovered_raw(oop ref, oop value) { 939 ref->obj_field_put_raw(discovered_offset, value); 940 } 941 static HeapWord* discovered_addr(oop ref) { 942 return ref->obj_field_addr<HeapWord>(discovered_offset); 943 } 944 // Accessors for statics 945 static oop pending_list_lock(); 946 static oop pending_list(); 947 948 static HeapWord* pending_list_lock_addr(); 949 static HeapWord* pending_list_addr(); 950 }; 951 952 953 // Interface to java.lang.ref.SoftReference objects 954 955 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 956 public: 957 enum { 958 // The timestamp is a long field and may need to be adjusted for alignment. 959 hc_timestamp_offset = hc_discovered_offset + 1 960 }; 961 enum { 962 hc_static_clock_offset = 0 963 }; 964 965 static int timestamp_offset; 966 static int static_clock_offset; 967 968 // Accessors 969 static jlong timestamp(oop ref); 970 971 // Accessors for statics 972 static jlong clock(); 973 static void set_clock(jlong value); 974 }; 975 976 // Interface to java.lang.invoke.MethodHandle objects 977 978 class MethodHandleEntry; 979 980 class java_lang_invoke_MethodHandle: AllStatic { 981 friend class JavaClasses; 982 983 private: 984 static int _type_offset; // the MethodType of this MH 985 static int _form_offset; // the LambdaForm of this MH 986 987 static void compute_offsets(); 988 989 public: 990 // Accessors 991 static oop type(oop mh); 992 static void set_type(oop mh, oop mtype); 993 994 static oop form(oop mh); 995 static void set_form(oop mh, oop lform); 996 997 // Testers 998 static bool is_subclass(Klass* klass) { 999 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 1000 } 1001 static bool is_instance(oop obj); 1002 1003 // Accessors for code generation: 1004 static int type_offset_in_bytes() { return _type_offset; } 1005 static int form_offset_in_bytes() { return _form_offset; } 1006 }; 1007 1008 // Interface to java.lang.invoke.DirectMethodHandle objects 1009 1010 class java_lang_invoke_DirectMethodHandle: AllStatic { 1011 friend class JavaClasses; 1012 1013 private: 1014 static int _member_offset; // the MemberName of this DMH 1015 1016 static void compute_offsets(); 1017 1018 public: 1019 // Accessors 1020 static oop member(oop mh); 1021 1022 // Testers 1023 static bool is_subclass(Klass* klass) { 1024 return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 1025 } 1026 static bool is_instance(oop obj); 1027 1028 // Accessors for code generation: 1029 static int member_offset_in_bytes() { return _member_offset; } 1030 }; 1031 1032 // Interface to java.lang.invoke.LambdaForm objects 1033 // (These are a private interface for managing adapter code generation.) 1034 1035 class java_lang_invoke_LambdaForm: AllStatic { 1036 friend class JavaClasses; 1037 1038 private: 1039 static int _vmentry_offset; // type is MemberName 1040 1041 static void compute_offsets(); 1042 1043 public: 1044 // Accessors 1045 static oop vmentry(oop lform); 1046 static void set_vmentry(oop lform, oop invoker); 1047 1048 // Testers 1049 static bool is_subclass(Klass* klass) { 1050 return SystemDictionary::LambdaForm_klass() != NULL && 1051 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 1052 } 1053 static bool is_instance(oop obj); 1054 1055 // Accessors for code generation: 1056 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 1057 }; 1058 1059 1060 // Interface to java.lang.invoke.MemberName objects 1061 // (These are a private interface for Java code to query the class hierarchy.) 1062 1063 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 1064 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 1065 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1066 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1067 1068 class java_lang_invoke_MemberName: AllStatic { 1069 friend class JavaClasses; 1070 1071 private: 1072 // From java.lang.invoke.MemberName: 1073 // private Class<?> clazz; // class in which the method is defined 1074 // private String name; // may be null if not yet materialized 1075 // private Object type; // may be null if not yet materialized 1076 // private int flags; // modifier bits; see reflect.Modifier 1077 // private intptr vmtarget; // VM-specific target value 1078 // private intptr_t vmindex; // member index within class or interface 1079 static int _clazz_offset; 1080 static int _name_offset; 1081 static int _type_offset; 1082 static int _flags_offset; 1083 static int _vmtarget_offset; 1084 static int _vmloader_offset; 1085 static int _vmindex_offset; 1086 1087 static void compute_offsets(); 1088 1089 public: 1090 // Accessors 1091 static oop clazz(oop mname); 1092 static void set_clazz(oop mname, oop clazz); 1093 1094 static oop type(oop mname); 1095 static void set_type(oop mname, oop type); 1096 1097 static oop name(oop mname); 1098 static void set_name(oop mname, oop name); 1099 1100 static int flags(oop mname); 1101 static void set_flags(oop mname, int flags); 1102 1103 static Metadata* vmtarget(oop mname); 1104 static void set_vmtarget(oop mname, Metadata* target); 1105 1106 static intptr_t vmindex(oop mname); 1107 static void set_vmindex(oop mname, intptr_t index); 1108 1109 // Testers 1110 static bool is_subclass(Klass* klass) { 1111 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1112 } 1113 static bool is_instance(oop obj); 1114 1115 static bool is_method(oop obj); 1116 1117 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1118 enum { 1119 MN_IS_METHOD = 0x00010000, // method (not constructor) 1120 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1121 MN_IS_FIELD = 0x00040000, // field 1122 MN_IS_TYPE = 0x00080000, // nested type 1123 MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected 1124 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1125 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1126 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1127 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1128 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1129 }; 1130 1131 // Accessors for code generation: 1132 static int clazz_offset_in_bytes() { return _clazz_offset; } 1133 static int type_offset_in_bytes() { return _type_offset; } 1134 static int name_offset_in_bytes() { return _name_offset; } 1135 static int flags_offset_in_bytes() { return _flags_offset; } 1136 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1137 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1138 }; 1139 1140 1141 // Interface to java.lang.invoke.MethodType objects 1142 1143 class java_lang_invoke_MethodType: AllStatic { 1144 friend class JavaClasses; 1145 1146 private: 1147 static int _rtype_offset; 1148 static int _ptypes_offset; 1149 1150 static void compute_offsets(); 1151 1152 public: 1153 // Accessors 1154 static oop rtype(oop mt); 1155 static objArrayOop ptypes(oop mt); 1156 1157 static oop ptype(oop mt, int index); 1158 static int ptype_count(oop mt); 1159 1160 static int ptype_slot_count(oop mt); // extra counts for long/double 1161 static int rtype_slot_count(oop mt); // extra counts for long/double 1162 1163 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1164 static void print_signature(oop mt, outputStream* st); 1165 1166 static bool is_instance(oop obj); 1167 1168 static bool equals(oop mt1, oop mt2); 1169 1170 // Accessors for code generation: 1171 static int rtype_offset_in_bytes() { return _rtype_offset; } 1172 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1173 }; 1174 1175 1176 // Interface to java.lang.invoke.CallSite objects 1177 1178 class java_lang_invoke_CallSite: AllStatic { 1179 friend class JavaClasses; 1180 1181 private: 1182 static int _target_offset; 1183 static int _context_offset; 1184 1185 static void compute_offsets(); 1186 1187 public: 1188 // Accessors 1189 static oop target( oop site); 1190 static void set_target( oop site, oop target); 1191 static void set_target_volatile( oop site, oop target); 1192 1193 static oop context(oop site); 1194 1195 // Testers 1196 static bool is_subclass(Klass* klass) { 1197 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1198 } 1199 static bool is_instance(oop obj); 1200 1201 // Accessors for code generation: 1202 static int target_offset_in_bytes() { return _target_offset; } 1203 }; 1204 1205 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects 1206 1207 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \ 1208 macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false) 1209 1210 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic { 1211 friend class JavaClasses; 1212 1213 private: 1214 static int _vmdependencies_offset; 1215 1216 static void compute_offsets(); 1217 1218 public: 1219 // Accessors 1220 static nmethodBucket* vmdependencies(oop context); 1221 static void set_vmdependencies(oop context, nmethodBucket* bucket); 1222 1223 // Testers 1224 static bool is_subclass(Klass* klass) { 1225 return klass->is_subclass_of(SystemDictionary::Context_klass()); 1226 } 1227 static bool is_instance(oop obj); 1228 }; 1229 1230 // Interface to java.security.AccessControlContext objects 1231 1232 class java_security_AccessControlContext: AllStatic { 1233 private: 1234 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1235 // so we compute the offsets at startup rather than hard-wiring them. 1236 static int _context_offset; 1237 static int _privilegedContext_offset; 1238 static int _isPrivileged_offset; 1239 static int _isAuthorized_offset; 1240 1241 static void compute_offsets(); 1242 public: 1243 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1244 1245 static bool is_authorized(Handle context); 1246 1247 // Debugging/initialization 1248 friend class JavaClasses; 1249 }; 1250 1251 1252 // Interface to java.lang.ClassLoader objects 1253 1254 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1255 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1256 1257 class java_lang_ClassLoader : AllStatic { 1258 private: 1259 // The fake offsets are added by the class loader when java.lang.Class is loaded 1260 enum { 1261 hc_parent_offset = 0 1262 }; 1263 static int _loader_data_offset; 1264 static bool offsets_computed; 1265 static int parent_offset; 1266 static int parallelCapable_offset; 1267 1268 public: 1269 static void compute_offsets(); 1270 1271 static ClassLoaderData** loader_data_addr(oop loader); 1272 static ClassLoaderData* loader_data(oop loader); 1273 1274 static oop parent(oop loader); 1275 static bool isAncestor(oop loader, oop cl); 1276 1277 // Support for parallelCapable field 1278 static bool parallelCapable(oop the_class_mirror); 1279 1280 static bool is_trusted_loader(oop loader); 1281 1282 // Fix for 4474172 1283 static oop non_reflection_class_loader(oop loader); 1284 1285 // Testers 1286 static bool is_subclass(Klass* klass) { 1287 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1288 } 1289 static bool is_instance(oop obj); 1290 1291 // Debugging 1292 friend class JavaClasses; 1293 friend class ClassFileParser; // access to number_of_fake_fields 1294 }; 1295 1296 1297 // Interface to java.lang.System objects 1298 1299 class java_lang_System : AllStatic { 1300 private: 1301 enum { 1302 hc_static_in_offset = 0, 1303 hc_static_out_offset = 1, 1304 hc_static_err_offset = 2, 1305 hc_static_security_offset = 3 1306 }; 1307 1308 static int static_in_offset; 1309 static int static_out_offset; 1310 static int static_err_offset; 1311 static int static_security_offset; 1312 1313 public: 1314 static int in_offset_in_bytes(); 1315 static int out_offset_in_bytes(); 1316 static int err_offset_in_bytes(); 1317 1318 static bool has_security_manager(); 1319 1320 // Debugging 1321 friend class JavaClasses; 1322 }; 1323 1324 1325 // Interface to java.lang.StackTraceElement objects 1326 1327 class java_lang_StackTraceElement: AllStatic { 1328 private: 1329 enum { 1330 hc_declaringClass_offset = 0, 1331 hc_methodName_offset = 1, 1332 hc_fileName_offset = 2, 1333 hc_lineNumber_offset = 3 1334 }; 1335 1336 static int declaringClass_offset; 1337 static int methodName_offset; 1338 static int fileName_offset; 1339 static int lineNumber_offset; 1340 1341 public: 1342 // Setters 1343 static void set_declaringClass(oop element, oop value); 1344 static void set_methodName(oop element, oop value); 1345 static void set_fileName(oop element, oop value); 1346 static void set_lineNumber(oop element, int value); 1347 1348 // Create an instance of StackTraceElement 1349 static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS); 1350 static oop create(methodHandle method, int bci, TRAPS); 1351 static void init(Handle element, Handle mirror, int method, int version, int bci, int cpref, TRAPS); 1352 1353 1354 // Debugging 1355 friend class JavaClasses; 1356 }; 1357 1358 1359 class BackTrace: AllStatic { 1360 public: 1361 // Helper backtrace functions to store bci|version together. 1362 static int merge_bci_and_version(int bci, int version); 1363 1364 static int merge_mid_and_cpref(int mid, int cpref); 1365 1366 static int bci_at(unsigned int merged); 1367 1368 static int version_at(unsigned int merged); 1369 1370 static int mid_at(unsigned int merged); 1371 1372 static int cpref_at(unsigned int merged); 1373 1374 static int get_line_number(methodHandle method, int bci); 1375 1376 static Symbol* get_source_file_name(InstanceKlass* holder, int version); 1377 1378 // Debugging 1379 friend class JavaClasses; 1380 }; 1381 1382 // Interface to java.lang.StackFrameInfo objects 1383 1384 class java_lang_StackFrameInfo: AllStatic { 1385 private: 1386 static int declaringClass_offset; 1387 static int memberName_offset; 1388 static int mid_offset; 1389 static int bci_offset; 1390 1391 static int methodName_offset; 1392 static int fileName_offset; 1393 static int lineNumber_offset; 1394 1395 static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS); 1396 static Symbol* get_file_name(Handle stackFrame, InstanceKlass* holder); 1397 1398 public: 1399 // Setters 1400 static void set_declaringClass(oop info, oop value); 1401 static void set_methodName(oop info, oop value); 1402 static void set_fileName(oop info, oop value); 1403 static void set_lineNumber(oop info, int value); 1404 1405 static void set_mid(oop info, int value); 1406 static void set_bci(oop info, int value); 1407 1408 static void compute_offsets(); 1409 1410 static int bci(oop info); 1411 static oop member_name(oop info); 1412 1413 // set method info in an instance of StackFrameInfo 1414 static void fill_methodInfo(Handle info, TRAPS); 1415 1416 // Debugging 1417 friend class JavaClasses; 1418 }; 1419 1420 class java_lang_LiveStackFrameInfo: AllStatic { 1421 private: 1422 1423 static int monitors_offset; 1424 static int locals_offset; 1425 static int operands_offset; 1426 1427 public: 1428 1429 static void set_monitors(oop info, oop value); 1430 static void set_locals(oop info, oop value); 1431 static void set_operands(oop info, oop value); 1432 1433 static void compute_offsets(); 1434 1435 // Debugging 1436 friend class JavaClasses; 1437 }; 1438 1439 // Interface to java.lang.AssertionStatusDirectives objects 1440 1441 class java_lang_AssertionStatusDirectives: AllStatic { 1442 private: 1443 enum { 1444 hc_classes_offset, 1445 hc_classEnabled_offset, 1446 hc_packages_offset, 1447 hc_packageEnabled_offset, 1448 hc_deflt_offset 1449 }; 1450 1451 static int classes_offset; 1452 static int classEnabled_offset; 1453 static int packages_offset; 1454 static int packageEnabled_offset; 1455 static int deflt_offset; 1456 1457 public: 1458 // Setters 1459 static void set_classes(oop obj, oop val); 1460 static void set_classEnabled(oop obj, oop val); 1461 static void set_packages(oop obj, oop val); 1462 static void set_packageEnabled(oop obj, oop val); 1463 static void set_deflt(oop obj, bool val); 1464 // Debugging 1465 friend class JavaClasses; 1466 }; 1467 1468 1469 class java_nio_Buffer: AllStatic { 1470 private: 1471 static int _limit_offset; 1472 1473 public: 1474 static int limit_offset(); 1475 static void compute_offsets(); 1476 }; 1477 1478 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1479 private: 1480 static int _owner_offset; 1481 public: 1482 static void initialize(TRAPS); 1483 static oop get_owner_threadObj(oop obj); 1484 }; 1485 1486 // Use to declare fields that need to be injected into Java classes 1487 // for the JVM to use. The name_index and signature_index are 1488 // declared in vmSymbols. The may_be_java flag is used to declare 1489 // fields that might already exist in Java but should be injected if 1490 // they don't. Otherwise the field is unconditionally injected and 1491 // the JVM uses the injected one. This is to ensure that name 1492 // collisions don't occur. In general may_be_java should be false 1493 // unless there's a good reason. 1494 1495 class InjectedField { 1496 public: 1497 const SystemDictionary::WKID klass_id; 1498 const vmSymbols::SID name_index; 1499 const vmSymbols::SID signature_index; 1500 const bool may_be_java; 1501 1502 1503 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1504 Symbol* name() const { return lookup_symbol(name_index); } 1505 Symbol* signature() const { return lookup_symbol(signature_index); } 1506 1507 int compute_offset(); 1508 1509 // Find the Symbol for this index 1510 static Symbol* lookup_symbol(int symbol_index) { 1511 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1512 } 1513 }; 1514 1515 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1516 klass##_##name##_enum, 1517 1518 #define ALL_INJECTED_FIELDS(macro) \ 1519 CLASS_INJECTED_FIELDS(macro) \ 1520 CLASSLOADER_INJECTED_FIELDS(macro) \ 1521 MEMBERNAME_INJECTED_FIELDS(macro) \ 1522 CALLSITECONTEXT_INJECTED_FIELDS(macro) 1523 1524 // Interface to hard-coded offset checking 1525 1526 class JavaClasses : AllStatic { 1527 private: 1528 1529 static InjectedField _injected_fields[]; 1530 1531 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1532 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1533 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1534 1535 public: 1536 enum InjectedFieldID { 1537 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1538 MAX_enum 1539 }; 1540 1541 static int compute_injected_offset(InjectedFieldID id); 1542 1543 static void compute_hard_coded_offsets(); 1544 static void compute_offsets(); 1545 static void check_offsets() PRODUCT_RETURN; 1546 1547 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1548 }; 1549 1550 #undef DECLARE_INJECTED_FIELD_ENUM 1551 1552 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP