1 /* 2 * Copyright (c) 1997, 2013, 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_value( oop string, typeArrayOop buffer) { 65 assert(initialized, "Must be initialized"); 66 string->obj_field_put(value_offset, (oop)buffer); 67 } 68 static void set_offset(oop string, int offset) { 69 assert(initialized, "Must be initialized"); 70 if (offset_offset > 0) { 71 string->int_field_put(offset_offset, offset); 72 } 73 } 74 static void set_count( oop string, int count) { 75 assert(initialized, "Must be initialized"); 76 if (count_offset > 0) { 77 string->int_field_put(count_offset, count); 78 } 79 } 80 81 public: 82 static void compute_offsets(); 83 84 // Instance creation 85 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 86 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 87 static Handle create_from_str(const char* utf8_str, TRAPS); 88 static oop create_oop_from_str(const char* utf8_str, TRAPS); 89 static Handle create_from_symbol(Symbol* symbol, TRAPS); 90 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 91 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 92 93 static bool has_offset_field() { 94 assert(initialized, "Must be initialized"); 95 return (offset_offset > 0); 96 } 97 98 static bool has_count_field() { 99 assert(initialized, "Must be initialized"); 100 return (count_offset > 0); 101 } 102 103 static bool has_hash_field() { 104 assert(initialized, "Must be initialized"); 105 return (hash_offset > 0); 106 } 107 108 static int value_offset_in_bytes() { 109 assert(initialized && (value_offset > 0), "Must be initialized"); 110 return value_offset; 111 } 112 static int count_offset_in_bytes() { 113 assert(initialized && (count_offset > 0), "Must be initialized"); 114 return count_offset; 115 } 116 static int offset_offset_in_bytes() { 117 assert(initialized && (offset_offset > 0), "Must be initialized"); 118 return offset_offset; 119 } 120 static int hash_offset_in_bytes() { 121 assert(initialized && (hash_offset > 0), "Must be initialized"); 122 return hash_offset; 123 } 124 125 // Accessors 126 static typeArrayOop value(oop java_string) { 127 assert(initialized && (value_offset > 0), "Must be initialized"); 128 assert(is_instance(java_string), "must be java_string"); 129 return (typeArrayOop) java_string->obj_field(value_offset); 130 } 131 static int offset(oop java_string) { 132 assert(initialized, "Must be initialized"); 133 assert(is_instance(java_string), "must be java_string"); 134 if (offset_offset > 0) { 135 return java_string->int_field(offset_offset); 136 } else { 137 return 0; 138 } 139 } 140 static int length(oop java_string) { 141 assert(initialized, "Must be initialized"); 142 assert(is_instance(java_string), "must be java_string"); 143 if (count_offset > 0) { 144 return java_string->int_field(count_offset); 145 } else { 146 return ((typeArrayOop)java_string->obj_field(value_offset))->length(); 147 } 148 } 149 static int utf8_length(oop java_string); 150 151 // String converters 152 static char* as_utf8_string(oop java_string); 153 static char* as_utf8_string(oop java_string, char* buf, int buflen); 154 static char* as_utf8_string(oop java_string, int start, int len); 155 static char* as_platform_dependent_str(Handle java_string, TRAPS); 156 static jchar* as_unicode_string(oop java_string, int& length); 157 // produce an ascii string with all other values quoted using \u#### 158 static char* as_quoted_ascii(oop java_string); 159 160 // Compute the hash value for a java.lang.String object which would 161 // contain the characters passed in. 162 // 163 // As the hash value used by the String object itself, in 164 // String.hashCode(). This value is normally calculated in Java code 165 // in the String.hashCode method(), but is precomputed for String 166 // objects in the shared archive file. 167 // hash P(31) from Kernighan & Ritchie 168 // 169 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 170 template <typename T> static unsigned int hash_code(T* s, int len) { 171 unsigned int h = 0; 172 while (len-- > 0) { 173 h = 31*h + (unsigned int) *s; 174 s++; 175 } 176 return h; 177 } 178 static unsigned int hash_code(oop java_string); 179 180 // This is the string hash code used by the StringTable, which may be 181 // the same as String.hashCode or an alternate hash code. 182 static unsigned int hash_string(oop java_string); 183 184 static bool equals(oop java_string, jchar* chars, int len); 185 186 // Conversion between '.' and '/' formats 187 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 188 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 189 190 // Conversion 191 static Symbol* as_symbol(Handle java_string, TRAPS); 192 static Symbol* as_symbol_or_null(oop java_string); 193 194 // Testers 195 static bool is_instance(oop obj) { 196 return obj != NULL && obj->klass() == SystemDictionary::String_klass(); 197 } 198 199 // Debugging 200 static void print(Handle java_string, outputStream* st); 201 friend class JavaClasses; 202 }; 203 204 205 // Interface to java.lang.Class objects 206 207 #define CLASS_INJECTED_FIELDS(macro) \ 208 macro(java_lang_Class, klass, intptr_signature, false) \ 209 macro(java_lang_Class, array_klass, intptr_signature, false) \ 210 macro(java_lang_Class, oop_size, int_signature, false) \ 211 macro(java_lang_Class, static_oop_field_count, int_signature, false) 212 213 class java_lang_Class : AllStatic { 214 friend class VMStructs; 215 216 private: 217 // The fake offsets are added by the class loader when java.lang.Class is loaded 218 219 static int _klass_offset; 220 static int _array_klass_offset; 221 222 static int _oop_size_offset; 223 static int _static_oop_field_count_offset; 224 225 static bool offsets_computed; 226 static int classRedefinedCount_offset; 227 static GrowableArray<Klass*>* _fixup_mirror_list; 228 229 public: 230 static void compute_offsets(); 231 232 // Instance creation 233 static oop create_mirror(KlassHandle k, TRAPS); 234 static void fixup_mirror(KlassHandle k, TRAPS); 235 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 236 // Conversion 237 static Klass* as_Klass(oop java_class); 238 static void set_klass(oop java_class, Klass* klass); 239 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 240 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 241 Klass* refk_oop = NULL; 242 BasicType result = as_BasicType(java_class, &refk_oop); 243 (*reference_klass) = KlassHandle(refk_oop); 244 return result; 245 } 246 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 247 static void print_signature(oop java_class, outputStream *st); 248 // Testing 249 static bool is_instance(oop obj) { 250 return obj != NULL && obj->klass() == SystemDictionary::Class_klass(); 251 } 252 static bool is_primitive(oop java_class); 253 static BasicType primitive_type(oop java_class); 254 static oop primitive_mirror(BasicType t); 255 // JVM_NewArray support 256 static Klass* array_klass(oop java_class); 257 static void set_array_klass(oop java_class, Klass* klass); 258 // compiler support for class operations 259 static int klass_offset_in_bytes() { return _klass_offset; } 260 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 261 // Support for classRedefinedCount field 262 static int classRedefinedCount(oop the_class_mirror); 263 static void set_classRedefinedCount(oop the_class_mirror, int value); 264 265 static int oop_size(oop java_class); 266 static void set_oop_size(oop java_class, int size); 267 static int static_oop_field_count(oop java_class); 268 static void set_static_oop_field_count(oop java_class, int size); 269 270 static GrowableArray<Klass*>* fixup_mirror_list() { 271 return _fixup_mirror_list; 272 } 273 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 274 _fixup_mirror_list = v; 275 } 276 // Debugging 277 friend class JavaClasses; 278 friend class InstanceKlass; // verification code accesses offsets 279 friend class ClassFileParser; // access to number_of_fake_fields 280 }; 281 282 // Interface to java.lang.Thread objects 283 284 class java_lang_Thread : AllStatic { 285 private: 286 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 287 // so we compute the offsets at startup rather than hard-wiring them. 288 static int _name_offset; 289 static int _group_offset; 290 static int _contextClassLoader_offset; 291 static int _inheritedAccessControlContext_offset; 292 static int _priority_offset; 293 static int _eetop_offset; 294 static int _daemon_offset; 295 static int _stillborn_offset; 296 static int _stackSize_offset; 297 static int _tid_offset; 298 static int _thread_status_offset; 299 static int _park_blocker_offset; 300 static int _park_event_offset ; 301 302 static void compute_offsets(); 303 304 public: 305 // Instance creation 306 static oop create(); 307 // Returns the JavaThread associated with the thread obj 308 static JavaThread* thread(oop java_thread); 309 // Set JavaThread for instance 310 static void set_thread(oop java_thread, JavaThread* thread); 311 // Name 312 static typeArrayOop name(oop java_thread); 313 static void set_name(oop java_thread, typeArrayOop name); 314 // Priority 315 static ThreadPriority priority(oop java_thread); 316 static void set_priority(oop java_thread, ThreadPriority priority); 317 // Thread group 318 static oop threadGroup(oop java_thread); 319 // Stillborn 320 static bool is_stillborn(oop java_thread); 321 static void set_stillborn(oop java_thread); 322 // Alive (NOTE: this is not really a field, but provides the correct 323 // definition without doing a Java call) 324 static bool is_alive(oop java_thread); 325 // Daemon 326 static bool is_daemon(oop java_thread); 327 static void set_daemon(oop java_thread); 328 // Context ClassLoader 329 static oop context_class_loader(oop java_thread); 330 // Control context 331 static oop inherited_access_control_context(oop java_thread); 332 // Stack size hint 333 static jlong stackSize(oop java_thread); 334 // Thread ID 335 static jlong thread_id(oop java_thread); 336 337 // Blocker object responsible for thread parking 338 static oop park_blocker(oop java_thread); 339 340 // Pointer to type-stable park handler, encoded as jlong. 341 // Should be set when apparently null 342 // For details, see unsafe.cpp Unsafe_Unpark 343 static jlong park_event(oop java_thread); 344 static bool set_park_event(oop java_thread, jlong ptr); 345 346 // Java Thread Status for JVMTI and M&M use. 347 // This thread status info is saved in threadStatus field of 348 // java.lang.Thread java class. 349 enum ThreadStatus { 350 NEW = 0, 351 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 352 JVMTI_THREAD_STATE_RUNNABLE, 353 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 354 JVMTI_THREAD_STATE_WAITING + 355 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 356 JVMTI_THREAD_STATE_SLEEPING, 357 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 358 JVMTI_THREAD_STATE_WAITING + 359 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 360 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 361 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 362 JVMTI_THREAD_STATE_WAITING + 363 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 364 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 365 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 366 JVMTI_THREAD_STATE_WAITING + 367 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 368 JVMTI_THREAD_STATE_PARKED, 369 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 370 JVMTI_THREAD_STATE_WAITING + 371 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 372 JVMTI_THREAD_STATE_PARKED, 373 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 374 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 375 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 376 }; 377 // Write thread status info to threadStatus field of java.lang.Thread. 378 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 379 // Read thread status info from threadStatus field of java.lang.Thread. 380 static ThreadStatus get_thread_status(oop java_thread_oop); 381 382 static const char* thread_status_name(oop java_thread_oop); 383 384 // Debugging 385 friend class JavaClasses; 386 }; 387 388 // Interface to java.lang.ThreadGroup objects 389 390 class java_lang_ThreadGroup : AllStatic { 391 private: 392 static int _parent_offset; 393 static int _name_offset; 394 static int _threads_offset; 395 static int _groups_offset; 396 static int _maxPriority_offset; 397 static int _destroyed_offset; 398 static int _daemon_offset; 399 static int _vmAllowSuspension_offset; 400 static int _nthreads_offset; 401 static int _ngroups_offset; 402 403 static void compute_offsets(); 404 405 public: 406 // parent ThreadGroup 407 static oop parent(oop java_thread_group); 408 // name 409 static typeArrayOop name(oop java_thread_group); 410 // ("name as oop" accessor is not necessary) 411 // Number of threads in group 412 static int nthreads(oop java_thread_group); 413 // threads 414 static objArrayOop threads(oop java_thread_group); 415 // Number of threads in group 416 static int ngroups(oop java_thread_group); 417 // groups 418 static objArrayOop groups(oop java_thread_group); 419 // maxPriority in group 420 static ThreadPriority maxPriority(oop java_thread_group); 421 // Destroyed 422 static bool is_destroyed(oop java_thread_group); 423 // Daemon 424 static bool is_daemon(oop java_thread_group); 425 // vmAllowSuspension 426 static bool is_vmAllowSuspension(oop java_thread_group); 427 // Debugging 428 friend class JavaClasses; 429 }; 430 431 432 433 // Interface to java.lang.Throwable objects 434 435 class java_lang_Throwable: AllStatic { 436 friend class BacktraceBuilder; 437 438 private: 439 // Offsets 440 enum { 441 hc_backtrace_offset = 0, 442 hc_detailMessage_offset = 1, 443 hc_cause_offset = 2, // New since 1.4 444 hc_stackTrace_offset = 3 // New since 1.4 445 }; 446 enum { 447 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 448 }; 449 // Trace constants 450 enum { 451 trace_methods_offset = 0, 452 trace_bcis_offset = 1, 453 trace_mirrors_offset = 2, 454 trace_next_offset = 3, 455 trace_size = 4, 456 trace_chunk_size = 32 457 }; 458 459 static int backtrace_offset; 460 static int detailMessage_offset; 461 static int cause_offset; 462 static int stackTrace_offset; 463 static int static_unassigned_stacktrace_offset; 464 465 // Printing 466 static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci); 467 // StackTrace (programmatic access, new since 1.4) 468 static void clear_stacktrace(oop throwable); 469 // No stack trace available 470 static const char* no_stack_trace_message(); 471 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 472 static void set_stacktrace(oop throwable, oop st_element_array); 473 static oop unassigned_stacktrace(); 474 475 public: 476 // Backtrace 477 static oop backtrace(oop throwable); 478 static void set_backtrace(oop throwable, oop value); 479 // Needed by JVMTI to filter out this internal field. 480 static int get_backtrace_offset() { return backtrace_offset;} 481 static int get_detailMessage_offset() { return detailMessage_offset;} 482 // Message 483 static oop message(oop throwable); 484 static oop message(Handle throwable); 485 static void set_message(oop throwable, oop value); 486 static void print_stack_element(outputStream *st, Handle mirror, int method, 487 int version, int bci); 488 static void print_stack_element(outputStream *st, methodHandle method, int bci); 489 static void print_stack_usage(Handle stream); 490 491 // Allocate space for backtrace (created but stack trace not filled in) 492 static void allocate_backtrace(Handle throwable, TRAPS); 493 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 494 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 495 // Fill in current stack trace, can cause GC 496 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS); 497 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle()); 498 // Programmatic access to stack trace 499 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 500 static int get_stack_trace_depth(oop throwable, TRAPS); 501 // Printing 502 static void print(oop throwable, outputStream* st); 503 static void print(Handle throwable, outputStream* st); 504 static void print_stack_trace(oop throwable, outputStream* st); 505 // Debugging 506 friend class JavaClasses; 507 }; 508 509 510 // Interface to java.lang.reflect.AccessibleObject objects 511 512 class java_lang_reflect_AccessibleObject: AllStatic { 513 private: 514 // Note that to reduce dependencies on the JDK we compute these 515 // offsets at run-time. 516 static int override_offset; 517 518 static void compute_offsets(); 519 520 public: 521 // Accessors 522 static jboolean override(oop reflect); 523 static void set_override(oop reflect, jboolean value); 524 525 // Debugging 526 friend class JavaClasses; 527 }; 528 529 530 // Interface to java.lang.reflect.Method objects 531 532 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 533 private: 534 // Note that to reduce dependencies on the JDK we compute these 535 // offsets at run-time. 536 static int clazz_offset; 537 static int name_offset; 538 static int returnType_offset; 539 static int parameterTypes_offset; 540 static int exceptionTypes_offset; 541 static int slot_offset; 542 static int modifiers_offset; 543 static int signature_offset; 544 static int annotations_offset; 545 static int parameter_annotations_offset; 546 static int annotation_default_offset; 547 static int type_annotations_offset; 548 549 static void compute_offsets(); 550 551 public: 552 // Allocation 553 static Handle create(TRAPS); 554 555 // Accessors 556 static oop clazz(oop reflect); 557 static void set_clazz(oop reflect, oop value); 558 559 static oop name(oop method); 560 static void set_name(oop method, oop value); 561 562 static oop return_type(oop method); 563 static void set_return_type(oop method, oop value); 564 565 static oop parameter_types(oop method); 566 static void set_parameter_types(oop method, oop value); 567 568 static oop exception_types(oop method); 569 static void set_exception_types(oop method, oop value); 570 571 static int slot(oop reflect); 572 static void set_slot(oop reflect, int value); 573 574 static int modifiers(oop method); 575 static void set_modifiers(oop method, int value); 576 577 static bool has_signature_field(); 578 static oop signature(oop method); 579 static void set_signature(oop method, oop value); 580 581 static bool has_annotations_field(); 582 static oop annotations(oop method); 583 static void set_annotations(oop method, oop value); 584 585 static bool has_parameter_annotations_field(); 586 static oop parameter_annotations(oop method); 587 static void set_parameter_annotations(oop method, oop value); 588 589 static bool has_annotation_default_field(); 590 static oop annotation_default(oop method); 591 static void set_annotation_default(oop method, oop value); 592 593 static bool has_type_annotations_field(); 594 static oop type_annotations(oop method); 595 static void set_type_annotations(oop method, oop value); 596 597 // Debugging 598 friend class JavaClasses; 599 }; 600 601 602 // Interface to java.lang.reflect.Constructor objects 603 604 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 605 private: 606 // Note that to reduce dependencies on the JDK we compute these 607 // offsets at run-time. 608 static int clazz_offset; 609 static int parameterTypes_offset; 610 static int exceptionTypes_offset; 611 static int slot_offset; 612 static int modifiers_offset; 613 static int signature_offset; 614 static int annotations_offset; 615 static int parameter_annotations_offset; 616 static int type_annotations_offset; 617 618 static void compute_offsets(); 619 620 public: 621 // Allocation 622 static Handle create(TRAPS); 623 624 // Accessors 625 static oop clazz(oop reflect); 626 static void set_clazz(oop reflect, oop value); 627 628 static oop parameter_types(oop constructor); 629 static void set_parameter_types(oop constructor, oop value); 630 631 static oop exception_types(oop constructor); 632 static void set_exception_types(oop constructor, oop value); 633 634 static int slot(oop reflect); 635 static void set_slot(oop reflect, int value); 636 637 static int modifiers(oop constructor); 638 static void set_modifiers(oop constructor, int value); 639 640 static bool has_signature_field(); 641 static oop signature(oop constructor); 642 static void set_signature(oop constructor, oop value); 643 644 static bool has_annotations_field(); 645 static oop annotations(oop constructor); 646 static void set_annotations(oop constructor, oop value); 647 648 static bool has_parameter_annotations_field(); 649 static oop parameter_annotations(oop method); 650 static void set_parameter_annotations(oop method, oop value); 651 652 static bool has_type_annotations_field(); 653 static oop type_annotations(oop constructor); 654 static void set_type_annotations(oop constructor, oop value); 655 656 // Debugging 657 friend class JavaClasses; 658 }; 659 660 661 // Interface to java.lang.reflect.Field objects 662 663 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 664 private: 665 // Note that to reduce dependencies on the JDK we compute these 666 // offsets at run-time. 667 static int clazz_offset; 668 static int name_offset; 669 static int type_offset; 670 static int slot_offset; 671 static int modifiers_offset; 672 static int signature_offset; 673 static int annotations_offset; 674 static int type_annotations_offset; 675 676 static void compute_offsets(); 677 678 public: 679 // Allocation 680 static Handle create(TRAPS); 681 682 // Accessors 683 static oop clazz(oop reflect); 684 static void set_clazz(oop reflect, oop value); 685 686 static oop name(oop field); 687 static void set_name(oop field, oop value); 688 689 static oop type(oop field); 690 static void set_type(oop field, oop value); 691 692 static int slot(oop reflect); 693 static void set_slot(oop reflect, int value); 694 695 static int modifiers(oop field); 696 static void set_modifiers(oop field, int value); 697 698 static bool has_signature_field(); 699 static oop signature(oop constructor); 700 static void set_signature(oop constructor, oop value); 701 702 static bool has_annotations_field(); 703 static oop annotations(oop constructor); 704 static void set_annotations(oop constructor, oop value); 705 706 static bool has_parameter_annotations_field(); 707 static oop parameter_annotations(oop method); 708 static void set_parameter_annotations(oop method, oop value); 709 710 static bool has_annotation_default_field(); 711 static oop annotation_default(oop method); 712 static void set_annotation_default(oop method, oop value); 713 714 static bool has_type_annotations_field(); 715 static oop type_annotations(oop field); 716 static void set_type_annotations(oop field, oop value); 717 718 // Debugging 719 friend class JavaClasses; 720 }; 721 722 class java_lang_reflect_Parameter { 723 private: 724 // Note that to reduce dependencies on the JDK we compute these 725 // offsets at run-time. 726 static int name_offset; 727 static int modifiers_offset; 728 static int index_offset; 729 static int executable_offset; 730 731 static void compute_offsets(); 732 733 public: 734 // Allocation 735 static Handle create(TRAPS); 736 737 // Accessors 738 static oop name(oop field); 739 static void set_name(oop field, oop value); 740 741 static int index(oop reflect); 742 static void set_index(oop reflect, int value); 743 744 static int modifiers(oop reflect); 745 static void set_modifiers(oop reflect, int value); 746 747 static oop executable(oop constructor); 748 static void set_executable(oop constructor, oop value); 749 750 friend class JavaClasses; 751 }; 752 753 // Interface to sun.reflect.ConstantPool objects 754 class sun_reflect_ConstantPool { 755 private: 756 // Note that to reduce dependencies on the JDK we compute these 757 // offsets at run-time. 758 static int _oop_offset; 759 760 static void compute_offsets(); 761 762 public: 763 // Allocation 764 static Handle create(TRAPS); 765 766 // Accessors 767 static void set_cp(oop reflect, ConstantPool* value); 768 static int oop_offset() { 769 return _oop_offset; 770 } 771 772 static ConstantPool* get_cp(oop reflect); 773 774 // Debugging 775 friend class JavaClasses; 776 }; 777 778 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 779 class sun_reflect_UnsafeStaticFieldAccessorImpl { 780 private: 781 static int _base_offset; 782 static void compute_offsets(); 783 784 public: 785 static int base_offset() { 786 return _base_offset; 787 } 788 789 // Debugging 790 friend class JavaClasses; 791 }; 792 793 // Interface to java.lang primitive type boxing objects: 794 // - java.lang.Boolean 795 // - java.lang.Character 796 // - java.lang.Float 797 // - java.lang.Double 798 // - java.lang.Byte 799 // - java.lang.Short 800 // - java.lang.Integer 801 // - java.lang.Long 802 803 // This could be separated out into 8 individual classes. 804 805 class java_lang_boxing_object: AllStatic { 806 private: 807 enum { 808 hc_value_offset = 0 809 }; 810 static int value_offset; 811 static int long_value_offset; 812 813 static oop initialize_and_allocate(BasicType type, TRAPS); 814 public: 815 // Allocation. Returns a boxed value, or NULL for invalid type. 816 static oop create(BasicType type, jvalue* value, TRAPS); 817 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 818 static BasicType get_value(oop box, jvalue* value); 819 static BasicType set_value(oop box, jvalue* value); 820 static BasicType basic_type(oop box); 821 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 822 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 823 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 824 static void print(BasicType type, jvalue* value, outputStream* st); 825 826 static int value_offset_in_bytes(BasicType type) { 827 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 828 value_offset; 829 } 830 831 // Debugging 832 friend class JavaClasses; 833 }; 834 835 836 837 // Interface to java.lang.ref.Reference objects 838 839 class java_lang_ref_Reference: AllStatic { 840 public: 841 enum { 842 hc_referent_offset = 0, 843 hc_queue_offset = 1, 844 hc_next_offset = 2, 845 hc_discovered_offset = 3 // Is not last, see SoftRefs. 846 }; 847 enum { 848 hc_static_lock_offset = 0, 849 hc_static_pending_offset = 1 850 }; 851 852 static int referent_offset; 853 static int queue_offset; 854 static int next_offset; 855 static int discovered_offset; 856 static int static_lock_offset; 857 static int static_pending_offset; 858 static int number_of_fake_oop_fields; 859 860 // Accessors 861 static oop referent(oop ref) { 862 return ref->obj_field(referent_offset); 863 } 864 static void set_referent(oop ref, oop value) { 865 ref->obj_field_put(referent_offset, value); 866 } 867 static void set_referent_raw(oop ref, oop value) { 868 ref->obj_field_put_raw(referent_offset, value); 869 } 870 static HeapWord* referent_addr(oop ref) { 871 return ref->obj_field_addr<HeapWord>(referent_offset); 872 } 873 static oop next(oop ref) { 874 return ref->obj_field(next_offset); 875 } 876 static void set_next(oop ref, oop value) { 877 ref->obj_field_put(next_offset, value); 878 } 879 static void set_next_raw(oop ref, oop value) { 880 ref->obj_field_put_raw(next_offset, value); 881 } 882 static HeapWord* next_addr(oop ref) { 883 return ref->obj_field_addr<HeapWord>(next_offset); 884 } 885 static oop discovered(oop ref) { 886 return ref->obj_field(discovered_offset); 887 } 888 static void set_discovered(oop ref, oop value) { 889 ref->obj_field_put(discovered_offset, value); 890 } 891 static void set_discovered_raw(oop ref, oop value) { 892 ref->obj_field_put_raw(discovered_offset, value); 893 } 894 static HeapWord* discovered_addr(oop ref) { 895 return ref->obj_field_addr<HeapWord>(discovered_offset); 896 } 897 // Accessors for statics 898 static oop pending_list_lock(); 899 static oop pending_list(); 900 901 static HeapWord* pending_list_lock_addr(); 902 static HeapWord* pending_list_addr(); 903 }; 904 905 906 // Interface to java.lang.ref.SoftReference objects 907 908 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 909 public: 910 enum { 911 // The timestamp is a long field and may need to be adjusted for alignment. 912 hc_timestamp_offset = hc_discovered_offset + 1 913 }; 914 enum { 915 hc_static_clock_offset = 0 916 }; 917 918 static int timestamp_offset; 919 static int static_clock_offset; 920 921 // Accessors 922 static jlong timestamp(oop ref); 923 924 // Accessors for statics 925 static jlong clock(); 926 static void set_clock(jlong value); 927 }; 928 929 930 // Interface to java.lang.invoke.MethodHandle objects 931 932 class MethodHandleEntry; 933 934 class java_lang_invoke_MethodHandle: AllStatic { 935 friend class JavaClasses; 936 937 private: 938 static int _type_offset; // the MethodType of this MH 939 static int _form_offset; // the LambdaForm of this MH 940 941 static void compute_offsets(); 942 943 public: 944 // Accessors 945 static oop type(oop mh); 946 static void set_type(oop mh, oop mtype); 947 948 static oop form(oop mh); 949 static void set_form(oop mh, oop lform); 950 951 // Testers 952 static bool is_subclass(Klass* klass) { 953 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 954 } 955 static bool is_instance(oop obj) { 956 return obj != NULL && is_subclass(obj->klass()); 957 } 958 959 // Accessors for code generation: 960 static int type_offset_in_bytes() { return _type_offset; } 961 static int form_offset_in_bytes() { return _form_offset; } 962 }; 963 964 // Interface to java.lang.invoke.LambdaForm objects 965 // (These are a private interface for managing adapter code generation.) 966 967 class java_lang_invoke_LambdaForm: AllStatic { 968 friend class JavaClasses; 969 970 private: 971 static int _vmentry_offset; // type is MemberName 972 973 static void compute_offsets(); 974 975 public: 976 // Accessors 977 static oop vmentry(oop lform); 978 static void set_vmentry(oop lform, oop invoker); 979 980 // Testers 981 static bool is_subclass(Klass* klass) { 982 return SystemDictionary::LambdaForm_klass() != NULL && 983 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 984 } 985 static bool is_instance(oop obj) { 986 return obj != NULL && is_subclass(obj->klass()); 987 } 988 989 // Accessors for code generation: 990 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 991 }; 992 993 994 // Interface to java.lang.invoke.MemberName objects 995 // (These are a private interface for Java code to query the class hierarchy.) 996 997 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 998 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 999 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 1000 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 1001 1002 class java_lang_invoke_MemberName: AllStatic { 1003 friend class JavaClasses; 1004 1005 private: 1006 // From java.lang.invoke.MemberName: 1007 // private Class<?> clazz; // class in which the method is defined 1008 // private String name; // may be null if not yet materialized 1009 // private Object type; // may be null if not yet materialized 1010 // private int flags; // modifier bits; see reflect.Modifier 1011 // private intptr vmtarget; // VM-specific target value 1012 // private intptr_t vmindex; // member index within class or interface 1013 static int _clazz_offset; 1014 static int _name_offset; 1015 static int _type_offset; 1016 static int _flags_offset; 1017 static int _vmtarget_offset; 1018 static int _vmloader_offset; 1019 static int _vmindex_offset; 1020 1021 static void compute_offsets(); 1022 1023 public: 1024 // Accessors 1025 static oop clazz(oop mname); 1026 static void set_clazz(oop mname, oop clazz); 1027 1028 static oop type(oop mname); 1029 static void set_type(oop mname, oop type); 1030 1031 static oop name(oop mname); 1032 static void set_name(oop mname, oop name); 1033 1034 static int flags(oop mname); 1035 static void set_flags(oop mname, int flags); 1036 1037 static Metadata* vmtarget(oop mname); 1038 static void set_vmtarget(oop mname, Metadata* target); 1039 1040 static intptr_t vmindex(oop mname); 1041 static void set_vmindex(oop mname, intptr_t index); 1042 1043 // Testers 1044 static bool is_subclass(Klass* klass) { 1045 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1046 } 1047 static bool is_instance(oop obj) { 1048 return obj != NULL && is_subclass(obj->klass()); 1049 } 1050 1051 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1052 enum { 1053 MN_IS_METHOD = 0x00010000, // method (not constructor) 1054 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1055 MN_IS_FIELD = 0x00040000, // field 1056 MN_IS_TYPE = 0x00080000, // nested type 1057 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1058 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1059 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1060 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1061 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1062 }; 1063 1064 // Accessors for code generation: 1065 static int clazz_offset_in_bytes() { return _clazz_offset; } 1066 static int type_offset_in_bytes() { return _type_offset; } 1067 static int name_offset_in_bytes() { return _name_offset; } 1068 static int flags_offset_in_bytes() { return _flags_offset; } 1069 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1070 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1071 }; 1072 1073 1074 // Interface to java.lang.invoke.MethodType objects 1075 1076 class java_lang_invoke_MethodType: AllStatic { 1077 friend class JavaClasses; 1078 1079 private: 1080 static int _rtype_offset; 1081 static int _ptypes_offset; 1082 1083 static void compute_offsets(); 1084 1085 public: 1086 // Accessors 1087 static oop rtype(oop mt); 1088 static objArrayOop ptypes(oop mt); 1089 1090 static oop ptype(oop mt, int index); 1091 static int ptype_count(oop mt); 1092 1093 static int ptype_slot_count(oop mt); // extra counts for long/double 1094 static int rtype_slot_count(oop mt); // extra counts for long/double 1095 1096 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1097 static void print_signature(oop mt, outputStream* st); 1098 1099 static bool is_instance(oop obj) { 1100 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass(); 1101 } 1102 1103 static bool equals(oop mt1, oop mt2); 1104 1105 // Accessors for code generation: 1106 static int rtype_offset_in_bytes() { return _rtype_offset; } 1107 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1108 }; 1109 1110 1111 // Interface to java.lang.invoke.CallSite objects 1112 1113 class java_lang_invoke_CallSite: AllStatic { 1114 friend class JavaClasses; 1115 1116 private: 1117 static int _target_offset; 1118 1119 static void compute_offsets(); 1120 1121 public: 1122 // Accessors 1123 static oop target( oop site) { return site->obj_field( _target_offset); } 1124 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); } 1125 1126 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); } 1127 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); } 1128 1129 // Testers 1130 static bool is_subclass(Klass* klass) { 1131 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1132 } 1133 static bool is_instance(oop obj) { 1134 return obj != NULL && is_subclass(obj->klass()); 1135 } 1136 1137 // Accessors for code generation: 1138 static int target_offset_in_bytes() { return _target_offset; } 1139 }; 1140 1141 1142 // Interface to java.security.AccessControlContext objects 1143 1144 class java_security_AccessControlContext: AllStatic { 1145 private: 1146 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1147 // so we compute the offsets at startup rather than hard-wiring them. 1148 static int _context_offset; 1149 static int _privilegedContext_offset; 1150 static int _isPrivileged_offset; 1151 1152 static void compute_offsets(); 1153 public: 1154 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1155 1156 // Debugging/initialization 1157 friend class JavaClasses; 1158 }; 1159 1160 1161 // Interface to java.lang.ClassLoader objects 1162 1163 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1164 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1165 1166 class java_lang_ClassLoader : AllStatic { 1167 private: 1168 // The fake offsets are added by the class loader when java.lang.Class is loaded 1169 enum { 1170 hc_parent_offset = 0 1171 }; 1172 static int _loader_data_offset; 1173 static bool offsets_computed; 1174 static int parent_offset; 1175 static int parallelCapable_offset; 1176 1177 public: 1178 static void compute_offsets(); 1179 1180 static ClassLoaderData** loader_data_addr(oop loader); 1181 static ClassLoaderData* loader_data(oop loader); 1182 1183 static oop parent(oop loader); 1184 static bool isAncestor(oop loader, oop cl); 1185 1186 // Support for parallelCapable field 1187 static bool parallelCapable(oop the_class_mirror); 1188 1189 static bool is_trusted_loader(oop loader); 1190 1191 // Fix for 4474172 1192 static oop non_reflection_class_loader(oop loader); 1193 1194 // Testers 1195 static bool is_subclass(Klass* klass) { 1196 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1197 } 1198 static bool is_instance(oop obj) { 1199 return obj != NULL && is_subclass(obj->klass()); 1200 } 1201 1202 // Debugging 1203 friend class JavaClasses; 1204 friend class ClassFileParser; // access to number_of_fake_fields 1205 }; 1206 1207 1208 // Interface to java.lang.System objects 1209 1210 class java_lang_System : AllStatic { 1211 private: 1212 enum { 1213 hc_static_in_offset = 0, 1214 hc_static_out_offset = 1, 1215 hc_static_err_offset = 2 1216 }; 1217 1218 static int static_in_offset; 1219 static int static_out_offset; 1220 static int static_err_offset; 1221 1222 public: 1223 static int in_offset_in_bytes(); 1224 static int out_offset_in_bytes(); 1225 static int err_offset_in_bytes(); 1226 1227 // Debugging 1228 friend class JavaClasses; 1229 }; 1230 1231 1232 // Interface to java.lang.StackTraceElement objects 1233 1234 class java_lang_StackTraceElement: AllStatic { 1235 private: 1236 enum { 1237 hc_declaringClass_offset = 0, 1238 hc_methodName_offset = 1, 1239 hc_fileName_offset = 2, 1240 hc_lineNumber_offset = 3 1241 }; 1242 1243 static int declaringClass_offset; 1244 static int methodName_offset; 1245 static int fileName_offset; 1246 static int lineNumber_offset; 1247 1248 public: 1249 // Setters 1250 static void set_declaringClass(oop element, oop value); 1251 static void set_methodName(oop element, oop value); 1252 static void set_fileName(oop element, oop value); 1253 static void set_lineNumber(oop element, int value); 1254 1255 // Create an instance of StackTraceElement 1256 static oop create(Handle mirror, int method, int version, int bci, TRAPS); 1257 static oop create(methodHandle method, int bci, TRAPS); 1258 1259 // Debugging 1260 friend class JavaClasses; 1261 }; 1262 1263 1264 // Interface to java.lang.AssertionStatusDirectives objects 1265 1266 class java_lang_AssertionStatusDirectives: AllStatic { 1267 private: 1268 enum { 1269 hc_classes_offset, 1270 hc_classEnabled_offset, 1271 hc_packages_offset, 1272 hc_packageEnabled_offset, 1273 hc_deflt_offset 1274 }; 1275 1276 static int classes_offset; 1277 static int classEnabled_offset; 1278 static int packages_offset; 1279 static int packageEnabled_offset; 1280 static int deflt_offset; 1281 1282 public: 1283 // Setters 1284 static void set_classes(oop obj, oop val); 1285 static void set_classEnabled(oop obj, oop val); 1286 static void set_packages(oop obj, oop val); 1287 static void set_packageEnabled(oop obj, oop val); 1288 static void set_deflt(oop obj, bool val); 1289 // Debugging 1290 friend class JavaClasses; 1291 }; 1292 1293 1294 class java_nio_Buffer: AllStatic { 1295 private: 1296 static int _limit_offset; 1297 1298 public: 1299 static int limit_offset(); 1300 static void compute_offsets(); 1301 }; 1302 1303 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1304 private: 1305 static int _owner_offset; 1306 public: 1307 static void initialize(TRAPS); 1308 static oop get_owner_threadObj(oop obj); 1309 }; 1310 1311 // Use to declare fields that need to be injected into Java classes 1312 // for the JVM to use. The name_index and signature_index are 1313 // declared in vmSymbols. The may_be_java flag is used to declare 1314 // fields that might already exist in Java but should be injected if 1315 // they don't. Otherwise the field is unconditionally injected and 1316 // the JVM uses the injected one. This is to ensure that name 1317 // collisions don't occur. In general may_be_java should be false 1318 // unless there's a good reason. 1319 1320 class InjectedField { 1321 public: 1322 const SystemDictionary::WKID klass_id; 1323 const vmSymbols::SID name_index; 1324 const vmSymbols::SID signature_index; 1325 const bool may_be_java; 1326 1327 1328 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1329 Symbol* name() const { return lookup_symbol(name_index); } 1330 Symbol* signature() const { return lookup_symbol(signature_index); } 1331 1332 int compute_offset(); 1333 1334 // Find the Symbol for this index 1335 static Symbol* lookup_symbol(int symbol_index) { 1336 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1337 } 1338 }; 1339 1340 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1341 klass##_##name##_enum, 1342 1343 #define ALL_INJECTED_FIELDS(macro) \ 1344 CLASS_INJECTED_FIELDS(macro) \ 1345 CLASSLOADER_INJECTED_FIELDS(macro) \ 1346 MEMBERNAME_INJECTED_FIELDS(macro) 1347 1348 // Interface to hard-coded offset checking 1349 1350 class JavaClasses : AllStatic { 1351 private: 1352 1353 static InjectedField _injected_fields[]; 1354 1355 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1356 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1357 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1358 1359 public: 1360 enum InjectedFieldID { 1361 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1362 MAX_enum 1363 }; 1364 1365 static int compute_injected_offset(InjectedFieldID id); 1366 1367 static void compute_hard_coded_offsets(); 1368 static void compute_offsets(); 1369 static void check_offsets() PRODUCT_RETURN; 1370 1371 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1372 }; 1373 1374 #undef DECLARE_INJECTED_FIELD_ENUM 1375 1376 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP