1 /* 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 // Interface for manipulating the basic Java classes. 26 // 27 // All dependencies on layout of actual Java classes should be kept here. 28 // If the layout of any of the classes above changes the offsets must be adjusted. 29 // 30 // For most classes we hardwire the offsets for performance reasons. In certain 31 // cases (e.g. java.security.AccessControlContext) we compute the offsets at 32 // startup since the layout here differs between JDK1.2 and JDK1.3. 33 // 34 // Note that fields (static and non-static) are arranged with oops before non-oops 35 // on a per class basis. The offsets below have to reflect this ordering. 36 // 37 // When editing the layouts please update the check_offset verification code 38 // correspondingly. The names in the enums must be identical to the actual field 39 // names in order for the verification code to work. 40 41 42 // Interface to java.lang.String objects 43 44 class java_lang_String : AllStatic { 45 private: 46 enum { 47 hc_value_offset = 0, 48 hc_offset_offset = 1 49 //hc_count_offset = 2 -- not a word-scaled offset 50 //hc_hash_offset = 3 -- not a word-scaled offset 51 }; 52 53 static int value_offset; 54 static int offset_offset; 55 static int count_offset; 56 static int hash_offset; 57 58 static Handle basic_create(int length, bool tenured, TRAPS); 59 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS); 60 61 static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); } 62 static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); } 63 static void set_count( oop string, int count) { string->int_field_put(count_offset, count); } 64 65 public: 66 // Instance creation 67 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 68 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS); 69 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 70 static Handle create_from_str(const char* utf8_str, TRAPS); 71 static oop create_oop_from_str(const char* utf8_str, TRAPS); 72 static Handle create_from_symbol(symbolHandle symbol, TRAPS); 73 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 74 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 75 76 static int value_offset_in_bytes() { return value_offset; } 77 static int count_offset_in_bytes() { return count_offset; } 78 static int offset_offset_in_bytes() { return offset_offset; } 79 static int hash_offset_in_bytes() { return hash_offset; } 80 81 // Accessors 82 static typeArrayOop value(oop java_string) { 83 assert(is_instance(java_string), "must be java_string"); 84 return (typeArrayOop) java_string->obj_field(value_offset); 85 } 86 static int offset(oop java_string) { 87 assert(is_instance(java_string), "must be java_string"); 88 return java_string->int_field(offset_offset); 89 } 90 static int length(oop java_string) { 91 assert(is_instance(java_string), "must be java_string"); 92 return java_string->int_field(count_offset); 93 } 94 static int utf8_length(oop java_string); 95 96 // String converters 97 static char* as_utf8_string(oop java_string); 98 static char* as_utf8_string(oop java_string, int start, int len); 99 static char* as_platform_dependent_str(Handle java_string, TRAPS); 100 static jchar* as_unicode_string(oop java_string, int& length); 101 102 static bool equals(oop java_string, jchar* chars, int len); 103 104 // Conversion between '.' and '/' formats 105 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 106 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 107 108 // Conversion 109 static symbolHandle as_symbol(Handle java_string, TRAPS); 110 static symbolOop as_symbol_or_null(oop java_string); 111 112 // Testers 113 static bool is_instance(oop obj) { 114 return obj != NULL && obj->klass() == SystemDictionary::string_klass(); 115 } 116 117 // Debugging 118 static void print(Handle java_string, outputStream* st); 119 friend class JavaClasses; 120 }; 121 122 123 // Interface to java.lang.Class objects 124 125 class java_lang_Class : AllStatic { 126 friend class VMStructs; 127 private: 128 // The fake offsets are added by the class loader when java.lang.Class is loaded 129 130 enum { 131 hc_klass_offset = 0, 132 hc_array_klass_offset = 1, 133 hc_resolved_constructor_offset = 2, 134 hc_number_of_fake_oop_fields = 3 135 }; 136 137 static int klass_offset; 138 static int resolved_constructor_offset; 139 static int array_klass_offset; 140 static int number_of_fake_oop_fields; 141 142 static void compute_offsets(); 143 static bool offsets_computed; 144 static int classRedefinedCount_offset; 145 static int parallelCapable_offset; 146 147 public: 148 // Instance creation 149 static oop create_mirror(KlassHandle k, TRAPS); 150 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 151 // Conversion 152 static klassOop as_klassOop(oop java_class); 153 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL); 154 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 155 klassOop refk_oop = NULL; 156 BasicType result = as_BasicType(java_class, &refk_oop); 157 (*reference_klass) = KlassHandle(refk_oop); 158 return result; 159 } 160 static symbolOop as_signature(oop java_class, bool intern_if_not_found, TRAPS); 161 static void print_signature(oop java_class, outputStream *st); 162 // Testing 163 static bool is_instance(oop obj) { 164 return obj != NULL && obj->klass() == SystemDictionary::class_klass(); 165 } 166 static bool is_primitive(oop java_class); 167 static BasicType primitive_type(oop java_class); 168 static oop primitive_mirror(BasicType t); 169 // JVM_NewInstance support 170 static methodOop resolved_constructor(oop java_class); 171 static void set_resolved_constructor(oop java_class, methodOop constructor); 172 // JVM_NewArray support 173 static klassOop array_klass(oop java_class); 174 static void set_array_klass(oop java_class, klassOop klass); 175 // compiler support for class operations 176 static int klass_offset_in_bytes() { return klass_offset; } 177 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; } 178 static int array_klass_offset_in_bytes() { return array_klass_offset; } 179 // Support for classRedefinedCount field 180 static int classRedefinedCount(oop the_class_mirror); 181 static void set_classRedefinedCount(oop the_class_mirror, int value); 182 // Support for parallelCapable field 183 static bool parallelCapable(oop the_class_mirror); 184 // Debugging 185 friend class JavaClasses; 186 friend class instanceKlass; // verification code accesses offsets 187 friend class ClassFileParser; // access to number_of_fake_fields 188 }; 189 190 // Interface to java.lang.Thread objects 191 192 class java_lang_Thread : AllStatic { 193 private: 194 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 195 // so we compute the offsets at startup rather than hard-wiring them. 196 static int _name_offset; 197 static int _group_offset; 198 static int _contextClassLoader_offset; 199 static int _inheritedAccessControlContext_offset; 200 static int _priority_offset; 201 static int _eetop_offset; 202 static int _daemon_offset; 203 static int _stillborn_offset; 204 static int _stackSize_offset; 205 static int _tid_offset; 206 static int _thread_status_offset; 207 static int _park_blocker_offset; 208 static int _park_event_offset ; 209 210 static void compute_offsets(); 211 212 public: 213 // Instance creation 214 static oop create(); 215 // Returns the JavaThread associated with the thread obj 216 static JavaThread* thread(oop java_thread); 217 // Set JavaThread for instance 218 static void set_thread(oop java_thread, JavaThread* thread); 219 // Name 220 static typeArrayOop name(oop java_thread); 221 static void set_name(oop java_thread, typeArrayOop name); 222 // Priority 223 static ThreadPriority priority(oop java_thread); 224 static void set_priority(oop java_thread, ThreadPriority priority); 225 // Thread group 226 static oop threadGroup(oop java_thread); 227 // Stillborn 228 static bool is_stillborn(oop java_thread); 229 static void set_stillborn(oop java_thread); 230 // Alive (NOTE: this is not really a field, but provides the correct 231 // definition without doing a Java call) 232 static bool is_alive(oop java_thread); 233 // Daemon 234 static bool is_daemon(oop java_thread); 235 static void set_daemon(oop java_thread); 236 // Context ClassLoader 237 static oop context_class_loader(oop java_thread); 238 // Control context 239 static oop inherited_access_control_context(oop java_thread); 240 // Stack size hint 241 static jlong stackSize(oop java_thread); 242 // Thread ID 243 static jlong thread_id(oop java_thread); 244 245 // Blocker object responsible for thread parking 246 static oop park_blocker(oop java_thread); 247 248 // Pointer to type-stable park handler, encoded as jlong. 249 // Should be set when apparently null 250 // For details, see unsafe.cpp Unsafe_Unpark 251 static jlong park_event(oop java_thread); 252 static bool set_park_event(oop java_thread, jlong ptr); 253 254 // Java Thread Status for JVMTI and M&M use. 255 // This thread status info is saved in threadStatus field of 256 // java.lang.Thread java class. 257 enum ThreadStatus { 258 NEW = 0, 259 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 260 JVMTI_THREAD_STATE_RUNNABLE, 261 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 262 JVMTI_THREAD_STATE_WAITING + 263 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 264 JVMTI_THREAD_STATE_SLEEPING, 265 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 266 JVMTI_THREAD_STATE_WAITING + 267 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 268 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 269 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 270 JVMTI_THREAD_STATE_WAITING + 271 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 272 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 273 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 274 JVMTI_THREAD_STATE_WAITING + 275 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 276 JVMTI_THREAD_STATE_PARKED, 277 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 278 JVMTI_THREAD_STATE_WAITING + 279 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 280 JVMTI_THREAD_STATE_PARKED, 281 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 282 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 283 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 284 }; 285 // Write thread status info to threadStatus field of java.lang.Thread. 286 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 287 // Read thread status info from threadStatus field of java.lang.Thread. 288 static ThreadStatus get_thread_status(oop java_thread_oop); 289 290 static const char* thread_status_name(oop java_thread_oop); 291 292 // Debugging 293 friend class JavaClasses; 294 }; 295 296 // Interface to java.lang.ThreadGroup objects 297 298 class java_lang_ThreadGroup : AllStatic { 299 private: 300 static int _parent_offset; 301 static int _name_offset; 302 static int _threads_offset; 303 static int _groups_offset; 304 static int _maxPriority_offset; 305 static int _destroyed_offset; 306 static int _daemon_offset; 307 static int _vmAllowSuspension_offset; 308 static int _nthreads_offset; 309 static int _ngroups_offset; 310 311 static void compute_offsets(); 312 313 public: 314 // parent ThreadGroup 315 static oop parent(oop java_thread_group); 316 // name 317 static typeArrayOop name(oop java_thread_group); 318 // ("name as oop" accessor is not necessary) 319 // Number of threads in group 320 static int nthreads(oop java_thread_group); 321 // threads 322 static objArrayOop threads(oop java_thread_group); 323 // Number of threads in group 324 static int ngroups(oop java_thread_group); 325 // groups 326 static objArrayOop groups(oop java_thread_group); 327 // maxPriority in group 328 static ThreadPriority maxPriority(oop java_thread_group); 329 // Destroyed 330 static bool is_destroyed(oop java_thread_group); 331 // Daemon 332 static bool is_daemon(oop java_thread_group); 333 // vmAllowSuspension 334 static bool is_vmAllowSuspension(oop java_thread_group); 335 // Debugging 336 friend class JavaClasses; 337 }; 338 339 340 341 // Interface to java.lang.Throwable objects 342 343 class java_lang_Throwable: AllStatic { 344 friend class BacktraceBuilder; 345 346 private: 347 // Offsets 348 enum { 349 hc_backtrace_offset = 0, 350 hc_detailMessage_offset = 1, 351 hc_cause_offset = 2, // New since 1.4 352 hc_stackTrace_offset = 3 // New since 1.4 353 }; 354 // Trace constants 355 enum { 356 trace_methods_offset = 0, 357 trace_bcis_offset = 1, 358 trace_next_offset = 2, 359 trace_size = 3, 360 trace_chunk_size = 32 361 }; 362 363 static int backtrace_offset; 364 static int detailMessage_offset; 365 static int cause_offset; 366 static int stackTrace_offset; 367 368 // Printing 369 static char* print_stack_element_to_buffer(methodOop method, int bci); 370 static void print_to_stream(Handle stream, const char* str); 371 // StackTrace (programmatic access, new since 1.4) 372 static void clear_stacktrace(oop throwable); 373 // No stack trace available 374 static const char* no_stack_trace_message(); 375 376 public: 377 // Backtrace 378 static oop backtrace(oop throwable); 379 static void set_backtrace(oop throwable, oop value); 380 // Needed by JVMTI to filter out this internal field. 381 static int get_backtrace_offset() { return backtrace_offset;} 382 static int get_detailMessage_offset() { return detailMessage_offset;} 383 // Message 384 static oop message(oop throwable); 385 static oop message(Handle throwable); 386 static void set_message(oop throwable, oop value); 387 // Print stack trace stored in exception by call-back to Java 388 // Note: this is no longer used in Merlin, but we still suppport 389 // it for compatibility. 390 static void print_stack_trace(oop throwable, oop print_stream); 391 static void print_stack_element(Handle stream, methodOop method, int bci); 392 static void print_stack_element(outputStream *st, methodOop method, int bci); 393 static void print_stack_usage(Handle stream); 394 395 // Allocate space for backtrace (created but stack trace not filled in) 396 static void allocate_backtrace(Handle throwable, TRAPS); 397 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 398 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 399 400 // Fill in current stack trace, can cause GC 401 static void fill_in_stack_trace(Handle throwable, TRAPS); 402 static void fill_in_stack_trace(Handle throwable); 403 // Programmatic access to stack trace 404 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 405 static int get_stack_trace_depth(oop throwable, TRAPS); 406 // Printing 407 static void print(oop throwable, outputStream* st); 408 static void print(Handle throwable, outputStream* st); 409 static void print_stack_trace(oop throwable, outputStream* st); 410 // Debugging 411 friend class JavaClasses; 412 }; 413 414 415 // Interface to java.lang.reflect.AccessibleObject objects 416 417 class java_lang_reflect_AccessibleObject: AllStatic { 418 private: 419 // Note that to reduce dependencies on the JDK we compute these 420 // offsets at run-time. 421 static int override_offset; 422 423 static void compute_offsets(); 424 425 public: 426 // Accessors 427 static jboolean override(oop reflect); 428 static void set_override(oop reflect, jboolean value); 429 430 // Debugging 431 friend class JavaClasses; 432 }; 433 434 435 // Interface to java.lang.reflect.Method objects 436 437 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 438 private: 439 // Note that to reduce dependencies on the JDK we compute these 440 // offsets at run-time. 441 static int clazz_offset; 442 static int name_offset; 443 static int returnType_offset; 444 static int parameterTypes_offset; 445 static int exceptionTypes_offset; 446 static int slot_offset; 447 static int modifiers_offset; 448 static int signature_offset; 449 static int annotations_offset; 450 static int parameter_annotations_offset; 451 static int annotation_default_offset; 452 453 static void compute_offsets(); 454 455 public: 456 // Allocation 457 static Handle create(TRAPS); 458 459 // Accessors 460 static oop clazz(oop reflect); 461 static void set_clazz(oop reflect, oop value); 462 463 static oop name(oop method); 464 static void set_name(oop method, oop value); 465 466 static oop return_type(oop method); 467 static void set_return_type(oop method, oop value); 468 469 static oop parameter_types(oop method); 470 static void set_parameter_types(oop method, oop value); 471 472 static oop exception_types(oop method); 473 static void set_exception_types(oop method, oop value); 474 475 static int slot(oop reflect); 476 static void set_slot(oop reflect, int value); 477 478 static int modifiers(oop method); 479 static void set_modifiers(oop method, int value); 480 481 static bool has_signature_field(); 482 static oop signature(oop method); 483 static void set_signature(oop method, oop value); 484 485 static bool has_annotations_field(); 486 static oop annotations(oop method); 487 static void set_annotations(oop method, oop value); 488 489 static bool has_parameter_annotations_field(); 490 static oop parameter_annotations(oop method); 491 static void set_parameter_annotations(oop method, oop value); 492 493 static bool has_annotation_default_field(); 494 static oop annotation_default(oop method); 495 static void set_annotation_default(oop method, oop value); 496 497 // Debugging 498 friend class JavaClasses; 499 }; 500 501 502 // Interface to java.lang.reflect.Constructor objects 503 504 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 505 private: 506 // Note that to reduce dependencies on the JDK we compute these 507 // offsets at run-time. 508 static int clazz_offset; 509 static int parameterTypes_offset; 510 static int exceptionTypes_offset; 511 static int slot_offset; 512 static int modifiers_offset; 513 static int signature_offset; 514 static int annotations_offset; 515 static int parameter_annotations_offset; 516 517 static void compute_offsets(); 518 519 public: 520 // Allocation 521 static Handle create(TRAPS); 522 523 // Accessors 524 static oop clazz(oop reflect); 525 static void set_clazz(oop reflect, oop value); 526 527 static oop parameter_types(oop constructor); 528 static void set_parameter_types(oop constructor, oop value); 529 530 static oop exception_types(oop constructor); 531 static void set_exception_types(oop constructor, oop value); 532 533 static int slot(oop reflect); 534 static void set_slot(oop reflect, int value); 535 536 static int modifiers(oop constructor); 537 static void set_modifiers(oop constructor, int value); 538 539 static bool has_signature_field(); 540 static oop signature(oop constructor); 541 static void set_signature(oop constructor, oop value); 542 543 static bool has_annotations_field(); 544 static oop annotations(oop constructor); 545 static void set_annotations(oop constructor, oop value); 546 547 static bool has_parameter_annotations_field(); 548 static oop parameter_annotations(oop method); 549 static void set_parameter_annotations(oop method, oop value); 550 551 // Debugging 552 friend class JavaClasses; 553 }; 554 555 556 // Interface to java.lang.reflect.Field objects 557 558 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 559 private: 560 // Note that to reduce dependencies on the JDK we compute these 561 // offsets at run-time. 562 static int clazz_offset; 563 static int name_offset; 564 static int type_offset; 565 static int slot_offset; 566 static int modifiers_offset; 567 static int signature_offset; 568 static int annotations_offset; 569 570 static void compute_offsets(); 571 572 public: 573 // Allocation 574 static Handle create(TRAPS); 575 576 // Accessors 577 static oop clazz(oop reflect); 578 static void set_clazz(oop reflect, oop value); 579 580 static oop name(oop field); 581 static void set_name(oop field, oop value); 582 583 static oop type(oop field); 584 static void set_type(oop field, oop value); 585 586 static int slot(oop reflect); 587 static void set_slot(oop reflect, int value); 588 589 static int modifiers(oop field); 590 static void set_modifiers(oop field, int value); 591 592 static bool has_signature_field(); 593 static oop signature(oop constructor); 594 static void set_signature(oop constructor, oop value); 595 596 static bool has_annotations_field(); 597 static oop annotations(oop constructor); 598 static void set_annotations(oop constructor, oop value); 599 600 static bool has_parameter_annotations_field(); 601 static oop parameter_annotations(oop method); 602 static void set_parameter_annotations(oop method, oop value); 603 604 static bool has_annotation_default_field(); 605 static oop annotation_default(oop method); 606 static void set_annotation_default(oop method, oop value); 607 608 // Debugging 609 friend class JavaClasses; 610 }; 611 612 // Interface to sun.reflect.ConstantPool objects 613 class sun_reflect_ConstantPool { 614 private: 615 // Note that to reduce dependencies on the JDK we compute these 616 // offsets at run-time. 617 static int _cp_oop_offset; 618 619 static void compute_offsets(); 620 621 public: 622 // Allocation 623 static Handle create(TRAPS); 624 625 // Accessors 626 static oop cp_oop(oop reflect); 627 static void set_cp_oop(oop reflect, oop value); 628 static int cp_oop_offset() { 629 return _cp_oop_offset; 630 } 631 632 // Debugging 633 friend class JavaClasses; 634 }; 635 636 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 637 class sun_reflect_UnsafeStaticFieldAccessorImpl { 638 private: 639 static int _base_offset; 640 static void compute_offsets(); 641 642 public: 643 static int base_offset() { 644 return _base_offset; 645 } 646 647 // Debugging 648 friend class JavaClasses; 649 }; 650 651 // Interface to java.lang primitive type boxing objects: 652 // - java.lang.Boolean 653 // - java.lang.Character 654 // - java.lang.Float 655 // - java.lang.Double 656 // - java.lang.Byte 657 // - java.lang.Short 658 // - java.lang.Integer 659 // - java.lang.Long 660 661 // This could be separated out into 8 individual classes. 662 663 class java_lang_boxing_object: AllStatic { 664 private: 665 enum { 666 hc_value_offset = 0 667 }; 668 static int value_offset; 669 static int long_value_offset; 670 671 static oop initialize_and_allocate(BasicType type, TRAPS); 672 public: 673 // Allocation. Returns a boxed value, or NULL for invalid type. 674 static oop create(BasicType type, jvalue* value, TRAPS); 675 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 676 static BasicType get_value(oop box, jvalue* value); 677 static BasicType set_value(oop box, jvalue* value); 678 static BasicType basic_type(oop box); 679 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 680 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 681 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 682 static void print(BasicType type, jvalue* value, outputStream* st); 683 684 static int value_offset_in_bytes(BasicType type) { 685 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 686 value_offset; 687 } 688 689 // Debugging 690 friend class JavaClasses; 691 }; 692 693 694 695 // Interface to java.lang.ref.Reference objects 696 697 class java_lang_ref_Reference: AllStatic { 698 public: 699 enum { 700 hc_referent_offset = 0, 701 hc_queue_offset = 1, 702 hc_next_offset = 2, 703 hc_discovered_offset = 3 // Is not last, see SoftRefs. 704 }; 705 enum { 706 hc_static_lock_offset = 0, 707 hc_static_pending_offset = 1 708 }; 709 710 static int referent_offset; 711 static int queue_offset; 712 static int next_offset; 713 static int discovered_offset; 714 static int static_lock_offset; 715 static int static_pending_offset; 716 static int number_of_fake_oop_fields; 717 718 // Accessors 719 static oop referent(oop ref) { 720 return ref->obj_field(referent_offset); 721 } 722 static void set_referent(oop ref, oop value) { 723 ref->obj_field_put(referent_offset, value); 724 } 725 static void set_referent_raw(oop ref, oop value) { 726 ref->obj_field_raw_put(referent_offset, value); 727 } 728 static HeapWord* referent_addr(oop ref) { 729 return ref->obj_field_addr<HeapWord>(referent_offset); 730 } 731 static oop next(oop ref) { 732 return ref->obj_field(next_offset); 733 } 734 static void set_next(oop ref, oop value) { 735 ref->obj_field_put(next_offset, value); 736 } 737 static void set_next_raw(oop ref, oop value) { 738 ref->obj_field_raw_put(next_offset, value); 739 } 740 static HeapWord* next_addr(oop ref) { 741 return ref->obj_field_addr<HeapWord>(next_offset); 742 } 743 static oop discovered(oop ref) { 744 return ref->obj_field(discovered_offset); 745 } 746 static void set_discovered(oop ref, oop value) { 747 ref->obj_field_put(discovered_offset, value); 748 } 749 static void set_discovered_raw(oop ref, oop value) { 750 ref->obj_field_raw_put(discovered_offset, value); 751 } 752 static HeapWord* discovered_addr(oop ref) { 753 return ref->obj_field_addr<HeapWord>(discovered_offset); 754 } 755 // Accessors for statics 756 static oop pending_list_lock(); 757 static oop pending_list(); 758 759 static HeapWord* pending_list_addr(); 760 }; 761 762 763 // Interface to java.lang.ref.SoftReference objects 764 765 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 766 public: 767 enum { 768 // The timestamp is a long field and may need to be adjusted for alignment. 769 hc_timestamp_offset = hc_discovered_offset + 1 770 }; 771 enum { 772 hc_static_clock_offset = 0 773 }; 774 775 static int timestamp_offset; 776 static int static_clock_offset; 777 778 // Accessors 779 static jlong timestamp(oop ref); 780 781 // Accessors for statics 782 static jlong clock(); 783 static void set_clock(jlong value); 784 }; 785 786 787 // Interface to java.dyn.MethodHandle objects 788 789 class MethodHandleEntry; 790 791 class java_dyn_MethodHandle: AllStatic { 792 friend class JavaClasses; 793 794 private: 795 static int _vmentry_offset; // assembly code trampoline for MH 796 static int _vmtarget_offset; // class-specific target reference 797 static int _type_offset; // the MethodType of this MH 798 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots 799 800 static void compute_offsets(); 801 802 public: 803 // Accessors 804 static oop type(oop mh); 805 static void set_type(oop mh, oop mtype); 806 807 static oop vmtarget(oop mh); 808 static void set_vmtarget(oop mh, oop target); 809 810 static MethodHandleEntry* vmentry(oop mh); 811 static void set_vmentry(oop mh, MethodHandleEntry* data); 812 813 static int vmslots(oop mh); 814 static void init_vmslots(oop mh); 815 static int compute_vmslots(oop mh); 816 817 // Testers 818 static bool is_subclass(klassOop klass) { 819 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass()); 820 } 821 static bool is_instance(oop obj) { 822 return obj != NULL && is_subclass(obj->klass()); 823 } 824 825 // Accessors for code generation: 826 static int type_offset_in_bytes() { return _type_offset; } 827 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 828 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 829 static int vmslots_offset_in_bytes() { return _vmslots_offset; } 830 }; 831 832 class sun_dyn_DirectMethodHandle: public java_dyn_MethodHandle { 833 friend class JavaClasses; 834 835 private: 836 // _vmtarget_offset; // method or class or interface 837 static int _vmindex_offset; // negative or vtable idx or itable idx 838 static void compute_offsets(); 839 840 public: 841 // Accessors 842 static int vmindex(oop mh); 843 static void set_vmindex(oop mh, int index); 844 845 // Testers 846 static bool is_subclass(klassOop klass) { 847 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 848 } 849 static bool is_instance(oop obj) { 850 return obj != NULL && is_subclass(obj->klass()); 851 } 852 853 // Accessors for code generation: 854 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 855 }; 856 857 class sun_dyn_BoundMethodHandle: public java_dyn_MethodHandle { 858 friend class JavaClasses; 859 860 private: 861 static int _argument_offset; // argument value bound into this MH 862 static int _vmargslot_offset; // relevant argument slot (<= vmslots) 863 static void compute_offsets(); 864 865 public: 866 static oop argument(oop mh); 867 static void set_argument(oop mh, oop ref); 868 869 static jint vmargslot(oop mh); 870 static void set_vmargslot(oop mh, jint slot); 871 872 // Testers 873 static bool is_subclass(klassOop klass) { 874 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass()); 875 } 876 static bool is_instance(oop obj) { 877 return obj != NULL && is_subclass(obj->klass()); 878 } 879 880 static int argument_offset_in_bytes() { return _argument_offset; } 881 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; } 882 }; 883 884 class sun_dyn_AdapterMethodHandle: public sun_dyn_BoundMethodHandle { 885 friend class JavaClasses; 886 887 private: 888 static int _conversion_offset; // type of conversion to apply 889 static void compute_offsets(); 890 891 public: 892 static int conversion(oop mh); 893 static void set_conversion(oop mh, int conv); 894 895 // Testers 896 static bool is_subclass(klassOop klass) { 897 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass()); 898 } 899 static bool is_instance(oop obj) { 900 return obj != NULL && is_subclass(obj->klass()); 901 } 902 903 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 904 enum { 905 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype 906 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T) 907 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument 908 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another 909 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive 910 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper (NYI) 911 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg) 912 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg) 913 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS) 914 OP_DROP_ARGS = 0x9, // remove one or more argument slots 915 OP_COLLECT_ARGS = 0xA, // combine one or more arguments into a varargs (NYI) 916 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size) 917 OP_FLYBY = 0xC, // operate first on reified argument list (NYI) 918 OP_RICOCHET = 0xD, // run an adapter chain on the return value (NYI) 919 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration 920 921 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field 922 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use 923 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK 924 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK 925 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed) 926 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed) 927 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change 928 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1 929 }; 930 931 static int conversion_offset_in_bytes() { return _conversion_offset; } 932 }; 933 934 935 // Interface to sun.dyn.MemberName objects 936 // (These are a private interface for Java code to query the class hierarchy.) 937 938 class sun_dyn_MemberName: AllStatic { 939 friend class JavaClasses; 940 941 private: 942 // From java.dyn.MemberName: 943 // private Class<?> clazz; // class in which the method is defined 944 // private String name; // may be null if not yet materialized 945 // private Object type; // may be null if not yet materialized 946 // private int flags; // modifier bits; see reflect.Modifier 947 // private Object vmtarget; // VM-specific target value 948 // private int vmindex; // method index within class or interface 949 static int _clazz_offset; 950 static int _name_offset; 951 static int _type_offset; 952 static int _flags_offset; 953 static int _vmtarget_offset; 954 static int _vmindex_offset; 955 956 static void compute_offsets(); 957 958 public: 959 // Accessors 960 static oop clazz(oop mname); 961 static void set_clazz(oop mname, oop clazz); 962 963 static oop type(oop mname); 964 static void set_type(oop mname, oop type); 965 966 static oop name(oop mname); 967 static void set_name(oop mname, oop name); 968 969 static int flags(oop mname); 970 static void set_flags(oop mname, int flags); 971 972 static int modifiers(oop mname) { return (u2) flags(mname); } 973 static void set_modifiers(oop mname, int mods) 974 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); } 975 976 static oop vmtarget(oop mname); 977 static void set_vmtarget(oop mname, oop target); 978 979 static int vmindex(oop mname); 980 static void set_vmindex(oop mname, int index); 981 982 // Testers 983 static bool is_subclass(klassOop klass) { 984 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass()); 985 } 986 static bool is_instance(oop obj) { 987 return obj != NULL && is_subclass(obj->klass()); 988 } 989 990 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 991 enum { 992 MN_IS_METHOD = 0x00010000, // method (not constructor) 993 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 994 MN_IS_FIELD = 0x00040000, // field 995 MN_IS_TYPE = 0x00080000, // nested type 996 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers 997 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers 998 VM_INDEX_UNINITIALIZED = -99 999 }; 1000 1001 // Accessors for code generation: 1002 static int clazz_offset_in_bytes() { return _clazz_offset; } 1003 static int type_offset_in_bytes() { return _type_offset; } 1004 static int name_offset_in_bytes() { return _name_offset; } 1005 static int flags_offset_in_bytes() { return _flags_offset; } 1006 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1007 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1008 }; 1009 1010 1011 // Interface to java.dyn.MethodType objects 1012 1013 class java_dyn_MethodType: AllStatic { 1014 friend class JavaClasses; 1015 1016 private: 1017 static int _rtype_offset; 1018 static int _ptypes_offset; 1019 static int _form_offset; 1020 1021 static void compute_offsets(); 1022 1023 public: 1024 // Accessors 1025 static oop rtype(oop mt); 1026 static objArrayOop ptypes(oop mt); 1027 static oop form(oop mt); 1028 1029 static oop ptype(oop mt, int index); 1030 static int ptype_count(oop mt); 1031 1032 static symbolOop as_signature(oop mt, bool intern_if_not_found, TRAPS); 1033 static void print_signature(oop mt, outputStream* st); 1034 1035 static bool is_instance(oop obj) { 1036 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass(); 1037 } 1038 1039 // Accessors for code generation: 1040 static int rtype_offset_in_bytes() { return _rtype_offset; } 1041 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1042 static int form_offset_in_bytes() { return _form_offset; } 1043 }; 1044 1045 class java_dyn_MethodTypeForm: AllStatic { 1046 friend class JavaClasses; 1047 1048 private: 1049 static int _vmslots_offset; // number of argument slots needed 1050 static int _erasedType_offset; // erasedType = canonical MethodType 1051 1052 static void compute_offsets(); 1053 1054 public: 1055 // Accessors 1056 static int vmslots(oop mtform); 1057 static oop erasedType(oop mtform); 1058 1059 // Accessors for code generation: 1060 static int vmslots_offset_in_bytes() { return _vmslots_offset; } 1061 static int erasedType_offset_in_bytes() { return _erasedType_offset; } 1062 }; 1063 1064 1065 // Interface to java.dyn.CallSite objects 1066 1067 class java_dyn_CallSite: AllStatic { 1068 friend class JavaClasses; 1069 1070 private: 1071 static int _type_offset; 1072 static int _target_offset; 1073 static int _vmmethod_offset; 1074 1075 static void compute_offsets(); 1076 1077 public: 1078 // Accessors 1079 static oop type(oop site); 1080 1081 static oop target(oop site); 1082 static void set_target(oop site, oop target); 1083 1084 static oop vmmethod(oop site); 1085 static void set_vmmethod(oop site, oop ref); 1086 1087 // Testers 1088 static bool is_subclass(klassOop klass) { 1089 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass()); 1090 } 1091 static bool is_instance(oop obj) { 1092 return obj != NULL && is_subclass(obj->klass()); 1093 } 1094 1095 // Accessors for code generation: 1096 static int target_offset_in_bytes() { return _target_offset; } 1097 static int type_offset_in_bytes() { return _type_offset; } 1098 static int vmmethod_offset_in_bytes() { return _vmmethod_offset; } 1099 }; 1100 1101 1102 // Interface to java.security.AccessControlContext objects 1103 1104 class java_security_AccessControlContext: AllStatic { 1105 private: 1106 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1107 // so we compute the offsets at startup rather than hard-wiring them. 1108 static int _context_offset; 1109 static int _privilegedContext_offset; 1110 static int _isPrivileged_offset; 1111 1112 static void compute_offsets(); 1113 public: 1114 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1115 1116 // Debugging/initialization 1117 friend class JavaClasses; 1118 }; 1119 1120 1121 // Interface to java.lang.ClassLoader objects 1122 1123 class java_lang_ClassLoader : AllStatic { 1124 private: 1125 enum { 1126 hc_parent_offset = 0 1127 }; 1128 1129 static int parent_offset; 1130 1131 public: 1132 static oop parent(oop loader); 1133 1134 static bool is_trusted_loader(oop loader); 1135 1136 // Fix for 4474172 1137 static oop non_reflection_class_loader(oop loader); 1138 1139 // Debugging 1140 friend class JavaClasses; 1141 }; 1142 1143 1144 // Interface to java.lang.System objects 1145 1146 class java_lang_System : AllStatic { 1147 private: 1148 enum { 1149 hc_static_in_offset = 0, 1150 hc_static_out_offset = 1, 1151 hc_static_err_offset = 2 1152 }; 1153 1154 static int offset_of_static_fields; 1155 static int static_in_offset; 1156 static int static_out_offset; 1157 static int static_err_offset; 1158 1159 static void compute_offsets(); 1160 1161 public: 1162 static int in_offset_in_bytes(); 1163 static int out_offset_in_bytes(); 1164 static int err_offset_in_bytes(); 1165 1166 // Debugging 1167 friend class JavaClasses; 1168 }; 1169 1170 1171 // Interface to java.lang.StackTraceElement objects 1172 1173 class java_lang_StackTraceElement: AllStatic { 1174 private: 1175 enum { 1176 hc_declaringClass_offset = 0, 1177 hc_methodName_offset = 1, 1178 hc_fileName_offset = 2, 1179 hc_lineNumber_offset = 3 1180 }; 1181 1182 static int declaringClass_offset; 1183 static int methodName_offset; 1184 static int fileName_offset; 1185 static int lineNumber_offset; 1186 1187 public: 1188 // Setters 1189 static void set_declaringClass(oop element, oop value); 1190 static void set_methodName(oop element, oop value); 1191 static void set_fileName(oop element, oop value); 1192 static void set_lineNumber(oop element, int value); 1193 1194 // Create an instance of StackTraceElement 1195 static oop create(methodHandle m, int bci, TRAPS); 1196 1197 // Debugging 1198 friend class JavaClasses; 1199 }; 1200 1201 1202 // Interface to java.lang.AssertionStatusDirectives objects 1203 1204 class java_lang_AssertionStatusDirectives: AllStatic { 1205 private: 1206 enum { 1207 hc_classes_offset, 1208 hc_classEnabled_offset, 1209 hc_packages_offset, 1210 hc_packageEnabled_offset, 1211 hc_deflt_offset 1212 }; 1213 1214 static int classes_offset; 1215 static int classEnabled_offset; 1216 static int packages_offset; 1217 static int packageEnabled_offset; 1218 static int deflt_offset; 1219 1220 public: 1221 // Setters 1222 static void set_classes(oop obj, oop val); 1223 static void set_classEnabled(oop obj, oop val); 1224 static void set_packages(oop obj, oop val); 1225 static void set_packageEnabled(oop obj, oop val); 1226 static void set_deflt(oop obj, bool val); 1227 // Debugging 1228 friend class JavaClasses; 1229 }; 1230 1231 1232 class java_nio_Buffer: AllStatic { 1233 private: 1234 static int _limit_offset; 1235 1236 public: 1237 static int limit_offset(); 1238 static void compute_offsets(); 1239 }; 1240 1241 class sun_misc_AtomicLongCSImpl: AllStatic { 1242 private: 1243 static int _value_offset; 1244 1245 public: 1246 static int value_offset(); 1247 static void compute_offsets(); 1248 }; 1249 1250 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1251 private: 1252 static int _owner_offset; 1253 public: 1254 static void initialize(TRAPS); 1255 static oop get_owner_threadObj(oop obj); 1256 }; 1257 1258 // Interface to hard-coded offset checking 1259 1260 class JavaClasses : AllStatic { 1261 private: 1262 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1263 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1264 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1265 public: 1266 static void compute_hard_coded_offsets(); 1267 static void compute_offsets(); 1268 static void check_offsets() PRODUCT_RETURN; 1269 };