1 /* 2 * Copyright (c) 1997, 2012, 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.toHash(). 170 template <typename T> static unsigned int to_hash(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 to_hash(oop java_string); 179 180 // This is the string hash code used by the StringTable, which may be 181 // the same as String.toHash 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, resolved_constructor, intptr_signature, false) \ 210 macro(java_lang_Class, array_klass, intptr_signature, false) \ 211 macro(java_lang_Class, oop_size, int_signature, false) \ 212 macro(java_lang_Class, static_oop_field_count, int_signature, false) 213 214 class java_lang_Class : AllStatic { 215 friend class VMStructs; 216 217 private: 218 // The fake offsets are added by the class loader when java.lang.Class is loaded 219 220 static int _klass_offset; 221 static int _resolved_constructor_offset; 222 static int _array_klass_offset; 223 224 static int _oop_size_offset; 225 static int _static_oop_field_count_offset; 226 227 static bool offsets_computed; 228 static int classRedefinedCount_offset; 229 static GrowableArray<Klass*>* _fixup_mirror_list; 230 231 public: 232 static void compute_offsets(); 233 234 // Instance creation 235 static oop create_mirror(KlassHandle k, TRAPS); 236 static void fixup_mirror(KlassHandle k, TRAPS); 237 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 238 // Conversion 239 static Klass* as_Klass(oop java_class); 240 static void set_klass(oop java_class, Klass* klass); 241 static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL); 242 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 243 Klass* refk_oop = NULL; 244 BasicType result = as_BasicType(java_class, &refk_oop); 245 (*reference_klass) = KlassHandle(refk_oop); 246 return result; 247 } 248 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 249 static void print_signature(oop java_class, outputStream *st); 250 // Testing 251 static bool is_instance(oop obj) { 252 return obj != NULL && obj->klass() == SystemDictionary::Class_klass(); 253 } 254 static bool is_primitive(oop java_class); 255 static BasicType primitive_type(oop java_class); 256 static oop primitive_mirror(BasicType t); 257 // JVM_NewInstance support 258 static Method* resolved_constructor(oop java_class); 259 static void set_resolved_constructor(oop java_class, Method* constructor); 260 // JVM_NewArray support 261 static Klass* array_klass(oop java_class); 262 static void set_array_klass(oop java_class, Klass* klass); 263 // compiler support for class operations 264 static int klass_offset_in_bytes() { return _klass_offset; } 265 static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; } 266 static int array_klass_offset_in_bytes() { return _array_klass_offset; } 267 // Support for classRedefinedCount field 268 static int classRedefinedCount(oop the_class_mirror); 269 static void set_classRedefinedCount(oop the_class_mirror, int value); 270 271 static int oop_size(oop java_class); 272 static void set_oop_size(oop java_class, int size); 273 static int static_oop_field_count(oop java_class); 274 static void set_static_oop_field_count(oop java_class, int size); 275 276 static GrowableArray<Klass*>* fixup_mirror_list() { 277 return _fixup_mirror_list; 278 } 279 static void set_fixup_mirror_list(GrowableArray<Klass*>* v) { 280 _fixup_mirror_list = v; 281 } 282 // Debugging 283 friend class JavaClasses; 284 friend class InstanceKlass; // verification code accesses offsets 285 friend class ClassFileParser; // access to number_of_fake_fields 286 }; 287 288 // Interface to java.lang.Thread objects 289 290 class java_lang_Thread : AllStatic { 291 private: 292 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 293 // so we compute the offsets at startup rather than hard-wiring them. 294 static int _name_offset; 295 static int _group_offset; 296 static int _contextClassLoader_offset; 297 static int _inheritedAccessControlContext_offset; 298 static int _priority_offset; 299 static int _eetop_offset; 300 static int _daemon_offset; 301 static int _stillborn_offset; 302 static int _stackSize_offset; 303 static int _tid_offset; 304 static int _thread_status_offset; 305 static int _park_blocker_offset; 306 static int _park_event_offset ; 307 308 static void compute_offsets(); 309 310 public: 311 // Instance creation 312 static oop create(); 313 // Returns the JavaThread associated with the thread obj 314 static JavaThread* thread(oop java_thread); 315 // Set JavaThread for instance 316 static void set_thread(oop java_thread, JavaThread* thread); 317 // Name 318 static typeArrayOop name(oop java_thread); 319 static void set_name(oop java_thread, typeArrayOop name); 320 // Priority 321 static ThreadPriority priority(oop java_thread); 322 static void set_priority(oop java_thread, ThreadPriority priority); 323 // Thread group 324 static oop threadGroup(oop java_thread); 325 // Stillborn 326 static bool is_stillborn(oop java_thread); 327 static void set_stillborn(oop java_thread); 328 // Alive (NOTE: this is not really a field, but provides the correct 329 // definition without doing a Java call) 330 static bool is_alive(oop java_thread); 331 // Daemon 332 static bool is_daemon(oop java_thread); 333 static void set_daemon(oop java_thread); 334 // Context ClassLoader 335 static oop context_class_loader(oop java_thread); 336 // Control context 337 static oop inherited_access_control_context(oop java_thread); 338 // Stack size hint 339 static jlong stackSize(oop java_thread); 340 // Thread ID 341 static jlong thread_id(oop java_thread); 342 343 // Blocker object responsible for thread parking 344 static oop park_blocker(oop java_thread); 345 346 // Pointer to type-stable park handler, encoded as jlong. 347 // Should be set when apparently null 348 // For details, see unsafe.cpp Unsafe_Unpark 349 static jlong park_event(oop java_thread); 350 static bool set_park_event(oop java_thread, jlong ptr); 351 352 // Java Thread Status for JVMTI and M&M use. 353 // This thread status info is saved in threadStatus field of 354 // java.lang.Thread java class. 355 enum ThreadStatus { 356 NEW = 0, 357 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 358 JVMTI_THREAD_STATE_RUNNABLE, 359 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 360 JVMTI_THREAD_STATE_WAITING + 361 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 362 JVMTI_THREAD_STATE_SLEEPING, 363 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 364 JVMTI_THREAD_STATE_WAITING + 365 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 366 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 367 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 368 JVMTI_THREAD_STATE_WAITING + 369 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 370 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 371 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 372 JVMTI_THREAD_STATE_WAITING + 373 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 374 JVMTI_THREAD_STATE_PARKED, 375 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 376 JVMTI_THREAD_STATE_WAITING + 377 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 378 JVMTI_THREAD_STATE_PARKED, 379 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 380 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 381 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 382 }; 383 // Write thread status info to threadStatus field of java.lang.Thread. 384 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 385 // Read thread status info from threadStatus field of java.lang.Thread. 386 static ThreadStatus get_thread_status(oop java_thread_oop); 387 388 static const char* thread_status_name(oop java_thread_oop); 389 390 // Debugging 391 friend class JavaClasses; 392 }; 393 394 // Interface to java.lang.ThreadGroup objects 395 396 class java_lang_ThreadGroup : AllStatic { 397 private: 398 static int _parent_offset; 399 static int _name_offset; 400 static int _threads_offset; 401 static int _groups_offset; 402 static int _maxPriority_offset; 403 static int _destroyed_offset; 404 static int _daemon_offset; 405 static int _vmAllowSuspension_offset; 406 static int _nthreads_offset; 407 static int _ngroups_offset; 408 409 static void compute_offsets(); 410 411 public: 412 // parent ThreadGroup 413 static oop parent(oop java_thread_group); 414 // name 415 static typeArrayOop name(oop java_thread_group); 416 // ("name as oop" accessor is not necessary) 417 // Number of threads in group 418 static int nthreads(oop java_thread_group); 419 // threads 420 static objArrayOop threads(oop java_thread_group); 421 // Number of threads in group 422 static int ngroups(oop java_thread_group); 423 // groups 424 static objArrayOop groups(oop java_thread_group); 425 // maxPriority in group 426 static ThreadPriority maxPriority(oop java_thread_group); 427 // Destroyed 428 static bool is_destroyed(oop java_thread_group); 429 // Daemon 430 static bool is_daemon(oop java_thread_group); 431 // vmAllowSuspension 432 static bool is_vmAllowSuspension(oop java_thread_group); 433 // Debugging 434 friend class JavaClasses; 435 }; 436 437 438 439 // Interface to java.lang.Throwable objects 440 441 class java_lang_Throwable: AllStatic { 442 friend class BacktraceBuilder; 443 444 private: 445 // Offsets 446 enum { 447 hc_backtrace_offset = 0, 448 hc_detailMessage_offset = 1, 449 hc_cause_offset = 2, // New since 1.4 450 hc_stackTrace_offset = 3 // New since 1.4 451 }; 452 enum { 453 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 454 }; 455 // Trace constants 456 enum { 457 trace_methods_offset = 0, 458 trace_bcis_offset = 1, 459 trace_mirrors_offset = 2, 460 trace_next_offset = 3, 461 trace_size = 4, 462 trace_chunk_size = 32 463 }; 464 465 static int backtrace_offset; 466 static int detailMessage_offset; 467 static int cause_offset; 468 static int stackTrace_offset; 469 static int static_unassigned_stacktrace_offset; 470 471 // Printing 472 static char* print_stack_element_to_buffer(Method* method, int bci); 473 static void print_to_stream(Handle stream, const char* str); 474 // StackTrace (programmatic access, new since 1.4) 475 static void clear_stacktrace(oop throwable); 476 // No stack trace available 477 static const char* no_stack_trace_message(); 478 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 479 static void set_stacktrace(oop throwable, oop st_element_array); 480 static oop unassigned_stacktrace(); 481 482 public: 483 // Backtrace 484 static oop backtrace(oop throwable); 485 static void set_backtrace(oop throwable, oop value); 486 // Needed by JVMTI to filter out this internal field. 487 static int get_backtrace_offset() { return backtrace_offset;} 488 static int get_detailMessage_offset() { return detailMessage_offset;} 489 // Message 490 static oop message(oop throwable); 491 static oop message(Handle throwable); 492 static void set_message(oop throwable, oop value); 493 // Print stack trace stored in exception by call-back to Java 494 // Note: this is no longer used in Merlin, but we still suppport 495 // it for compatibility. 496 static void print_stack_trace(oop throwable, oop print_stream); 497 static void print_stack_element(Handle stream, Method* method, int bci); 498 static void print_stack_element(outputStream *st, Method* method, int bci); 499 static void print_stack_usage(Handle stream); 500 501 // Allocate space for backtrace (created but stack trace not filled in) 502 static void allocate_backtrace(Handle throwable, TRAPS); 503 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 504 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 505 // Fill in current stack trace, can cause GC 506 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS); 507 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle()); 508 // Programmatic access to stack trace 509 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 510 static int get_stack_trace_depth(oop throwable, TRAPS); 511 // Printing 512 static void print(oop throwable, outputStream* st); 513 static void print(Handle throwable, outputStream* st); 514 static void print_stack_trace(oop throwable, outputStream* st); 515 // Debugging 516 friend class JavaClasses; 517 }; 518 519 520 // Interface to java.lang.reflect.AccessibleObject objects 521 522 class java_lang_reflect_AccessibleObject: AllStatic { 523 private: 524 // Note that to reduce dependencies on the JDK we compute these 525 // offsets at run-time. 526 static int override_offset; 527 528 static void compute_offsets(); 529 530 public: 531 // Accessors 532 static jboolean override(oop reflect); 533 static void set_override(oop reflect, jboolean value); 534 535 // Debugging 536 friend class JavaClasses; 537 }; 538 539 540 // Interface to java.lang.reflect.Method objects 541 542 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 543 private: 544 // Note that to reduce dependencies on the JDK we compute these 545 // offsets at run-time. 546 static int clazz_offset; 547 static int name_offset; 548 static int returnType_offset; 549 static int parameterTypes_offset; 550 static int exceptionTypes_offset; 551 static int slot_offset; 552 static int modifiers_offset; 553 static int signature_offset; 554 static int annotations_offset; 555 static int parameter_annotations_offset; 556 static int annotation_default_offset; 557 558 static void compute_offsets(); 559 560 public: 561 // Allocation 562 static Handle create(TRAPS); 563 564 // Accessors 565 static oop clazz(oop reflect); 566 static void set_clazz(oop reflect, oop value); 567 568 static oop name(oop method); 569 static void set_name(oop method, oop value); 570 571 static oop return_type(oop method); 572 static void set_return_type(oop method, oop value); 573 574 static oop parameter_types(oop method); 575 static void set_parameter_types(oop method, oop value); 576 577 static oop exception_types(oop method); 578 static void set_exception_types(oop method, oop value); 579 580 static int slot(oop reflect); 581 static void set_slot(oop reflect, int value); 582 583 static int modifiers(oop method); 584 static void set_modifiers(oop method, int value); 585 586 static bool has_signature_field(); 587 static oop signature(oop method); 588 static void set_signature(oop method, oop value); 589 590 static bool has_annotations_field(); 591 static oop annotations(oop method); 592 static void set_annotations(oop method, oop value); 593 594 static bool has_parameter_annotations_field(); 595 static oop parameter_annotations(oop method); 596 static void set_parameter_annotations(oop method, oop value); 597 598 static bool has_annotation_default_field(); 599 static oop annotation_default(oop method); 600 static void set_annotation_default(oop method, oop value); 601 602 // Debugging 603 friend class JavaClasses; 604 }; 605 606 607 // Interface to java.lang.reflect.Constructor objects 608 609 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 610 private: 611 // Note that to reduce dependencies on the JDK we compute these 612 // offsets at run-time. 613 static int clazz_offset; 614 static int parameterTypes_offset; 615 static int exceptionTypes_offset; 616 static int slot_offset; 617 static int modifiers_offset; 618 static int signature_offset; 619 static int annotations_offset; 620 static int parameter_annotations_offset; 621 622 static void compute_offsets(); 623 624 public: 625 // Allocation 626 static Handle create(TRAPS); 627 628 // Accessors 629 static oop clazz(oop reflect); 630 static void set_clazz(oop reflect, oop value); 631 632 static oop parameter_types(oop constructor); 633 static void set_parameter_types(oop constructor, oop value); 634 635 static oop exception_types(oop constructor); 636 static void set_exception_types(oop constructor, oop value); 637 638 static int slot(oop reflect); 639 static void set_slot(oop reflect, int value); 640 641 static int modifiers(oop constructor); 642 static void set_modifiers(oop constructor, int value); 643 644 static bool has_signature_field(); 645 static oop signature(oop constructor); 646 static void set_signature(oop constructor, oop value); 647 648 static bool has_annotations_field(); 649 static oop annotations(oop constructor); 650 static void set_annotations(oop constructor, oop value); 651 652 static bool has_parameter_annotations_field(); 653 static oop parameter_annotations(oop method); 654 static void set_parameter_annotations(oop method, 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; 674 675 static void compute_offsets(); 676 677 public: 678 // Allocation 679 static Handle create(TRAPS); 680 681 // Accessors 682 static oop clazz(oop reflect); 683 static void set_clazz(oop reflect, oop value); 684 685 static oop name(oop field); 686 static void set_name(oop field, oop value); 687 688 static oop type(oop field); 689 static void set_type(oop field, oop value); 690 691 static int slot(oop reflect); 692 static void set_slot(oop reflect, int value); 693 694 static int modifiers(oop field); 695 static void set_modifiers(oop field, int value); 696 697 static bool has_signature_field(); 698 static oop signature(oop constructor); 699 static void set_signature(oop constructor, oop value); 700 701 static bool has_annotations_field(); 702 static oop annotations(oop constructor); 703 static void set_annotations(oop constructor, oop value); 704 705 static bool has_parameter_annotations_field(); 706 static oop parameter_annotations(oop method); 707 static void set_parameter_annotations(oop method, oop value); 708 709 static bool has_annotation_default_field(); 710 static oop annotation_default(oop method); 711 static void set_annotation_default(oop method, oop value); 712 713 // Debugging 714 friend class JavaClasses; 715 }; 716 717 // Interface to sun.reflect.ConstantPool objects 718 class sun_reflect_ConstantPool { 719 private: 720 // Note that to reduce dependencies on the JDK we compute these 721 // offsets at run-time. 722 static int _oop_offset; 723 724 static void compute_offsets(); 725 726 public: 727 // Allocation 728 static Handle create(TRAPS); 729 730 // Accessors 731 static void set_cp(oop reflect, ConstantPool* value); 732 static int oop_offset() { 733 return _oop_offset; 734 } 735 736 static ConstantPool* get_cp(oop reflect); 737 738 // Debugging 739 friend class JavaClasses; 740 }; 741 742 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 743 class sun_reflect_UnsafeStaticFieldAccessorImpl { 744 private: 745 static int _base_offset; 746 static void compute_offsets(); 747 748 public: 749 static int base_offset() { 750 return _base_offset; 751 } 752 753 // Debugging 754 friend class JavaClasses; 755 }; 756 757 // Interface to java.lang primitive type boxing objects: 758 // - java.lang.Boolean 759 // - java.lang.Character 760 // - java.lang.Float 761 // - java.lang.Double 762 // - java.lang.Byte 763 // - java.lang.Short 764 // - java.lang.Integer 765 // - java.lang.Long 766 767 // This could be separated out into 8 individual classes. 768 769 class java_lang_boxing_object: AllStatic { 770 private: 771 enum { 772 hc_value_offset = 0 773 }; 774 static int value_offset; 775 static int long_value_offset; 776 777 static oop initialize_and_allocate(BasicType type, TRAPS); 778 public: 779 // Allocation. Returns a boxed value, or NULL for invalid type. 780 static oop create(BasicType type, jvalue* value, TRAPS); 781 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 782 static BasicType get_value(oop box, jvalue* value); 783 static BasicType set_value(oop box, jvalue* value); 784 static BasicType basic_type(oop box); 785 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 786 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 787 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 788 static void print(BasicType type, jvalue* value, outputStream* st); 789 790 static int value_offset_in_bytes(BasicType type) { 791 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 792 value_offset; 793 } 794 795 // Debugging 796 friend class JavaClasses; 797 }; 798 799 800 801 // Interface to java.lang.ref.Reference objects 802 803 class java_lang_ref_Reference: AllStatic { 804 public: 805 enum { 806 hc_referent_offset = 0, 807 hc_queue_offset = 1, 808 hc_next_offset = 2, 809 hc_discovered_offset = 3 // Is not last, see SoftRefs. 810 }; 811 enum { 812 hc_static_lock_offset = 0, 813 hc_static_pending_offset = 1 814 }; 815 816 static int referent_offset; 817 static int queue_offset; 818 static int next_offset; 819 static int discovered_offset; 820 static int static_lock_offset; 821 static int static_pending_offset; 822 static int number_of_fake_oop_fields; 823 824 // Accessors 825 static oop referent(oop ref) { 826 return ref->obj_field(referent_offset); 827 } 828 static void set_referent(oop ref, oop value) { 829 ref->obj_field_put(referent_offset, value); 830 } 831 static void set_referent_raw(oop ref, oop value) { 832 ref->obj_field_put_raw(referent_offset, value); 833 } 834 static HeapWord* referent_addr(oop ref) { 835 return ref->obj_field_addr<HeapWord>(referent_offset); 836 } 837 static oop next(oop ref) { 838 return ref->obj_field(next_offset); 839 } 840 static void set_next(oop ref, oop value) { 841 ref->obj_field_put(next_offset, value); 842 } 843 static void set_next_raw(oop ref, oop value) { 844 ref->obj_field_put_raw(next_offset, value); 845 } 846 static HeapWord* next_addr(oop ref) { 847 return ref->obj_field_addr<HeapWord>(next_offset); 848 } 849 static oop discovered(oop ref) { 850 return ref->obj_field(discovered_offset); 851 } 852 static void set_discovered(oop ref, oop value) { 853 ref->obj_field_put(discovered_offset, value); 854 } 855 static void set_discovered_raw(oop ref, oop value) { 856 ref->obj_field_put_raw(discovered_offset, value); 857 } 858 static HeapWord* discovered_addr(oop ref) { 859 return ref->obj_field_addr<HeapWord>(discovered_offset); 860 } 861 // Accessors for statics 862 static oop pending_list_lock(); 863 static oop pending_list(); 864 865 static HeapWord* pending_list_lock_addr(); 866 static HeapWord* pending_list_addr(); 867 }; 868 869 870 // Interface to java.lang.ref.SoftReference objects 871 872 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 873 public: 874 enum { 875 // The timestamp is a long field and may need to be adjusted for alignment. 876 hc_timestamp_offset = hc_discovered_offset + 1 877 }; 878 enum { 879 hc_static_clock_offset = 0 880 }; 881 882 static int timestamp_offset; 883 static int static_clock_offset; 884 885 // Accessors 886 static jlong timestamp(oop ref); 887 888 // Accessors for statics 889 static jlong clock(); 890 static void set_clock(jlong value); 891 }; 892 893 894 // Interface to java.lang.invoke.MethodHandle objects 895 896 class MethodHandleEntry; 897 898 class java_lang_invoke_MethodHandle: AllStatic { 899 friend class JavaClasses; 900 901 private: 902 static int _type_offset; // the MethodType of this MH 903 static int _form_offset; // the LambdaForm of this MH 904 905 static void compute_offsets(); 906 907 public: 908 // Accessors 909 static oop type(oop mh); 910 static void set_type(oop mh, oop mtype); 911 912 static oop form(oop mh); 913 static void set_form(oop mh, oop lform); 914 915 // Testers 916 static bool is_subclass(Klass* klass) { 917 return klass->is_subclass_of(SystemDictionary::MethodHandle_klass()); 918 } 919 static bool is_instance(oop obj) { 920 return obj != NULL && is_subclass(obj->klass()); 921 } 922 923 // Accessors for code generation: 924 static int type_offset_in_bytes() { return _type_offset; } 925 static int form_offset_in_bytes() { return _form_offset; } 926 }; 927 928 // Interface to java.lang.invoke.LambdaForm objects 929 // (These are a private interface for managing adapter code generation.) 930 931 class java_lang_invoke_LambdaForm: AllStatic { 932 friend class JavaClasses; 933 934 private: 935 static int _vmentry_offset; // type is MemberName 936 937 static void compute_offsets(); 938 939 public: 940 // Accessors 941 static oop vmentry(oop lform); 942 static void set_vmentry(oop lform, oop invoker); 943 944 // Testers 945 static bool is_subclass(Klass* klass) { 946 return SystemDictionary::LambdaForm_klass() != NULL && 947 klass->is_subclass_of(SystemDictionary::LambdaForm_klass()); 948 } 949 static bool is_instance(oop obj) { 950 return obj != NULL && is_subclass(obj->klass()); 951 } 952 953 // Accessors for code generation: 954 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 955 }; 956 957 958 // Interface to java.lang.invoke.MemberName objects 959 // (These are a private interface for Java code to query the class hierarchy.) 960 961 #define MEMBERNAME_INJECTED_FIELDS(macro) \ 962 macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \ 963 macro(java_lang_invoke_MemberName, vmindex, intptr_signature, false) \ 964 macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false) 965 966 class java_lang_invoke_MemberName: AllStatic { 967 friend class JavaClasses; 968 969 private: 970 // From java.lang.invoke.MemberName: 971 // private Class<?> clazz; // class in which the method is defined 972 // private String name; // may be null if not yet materialized 973 // private Object type; // may be null if not yet materialized 974 // private int flags; // modifier bits; see reflect.Modifier 975 // private intptr vmtarget; // VM-specific target value 976 // private intptr_t vmindex; // member index within class or interface 977 static int _clazz_offset; 978 static int _name_offset; 979 static int _type_offset; 980 static int _flags_offset; 981 static int _vmtarget_offset; 982 static int _vmloader_offset; 983 static int _vmindex_offset; 984 985 static void compute_offsets(); 986 987 public: 988 // Accessors 989 static oop clazz(oop mname); 990 static void set_clazz(oop mname, oop clazz); 991 992 static oop type(oop mname); 993 static void set_type(oop mname, oop type); 994 995 static oop name(oop mname); 996 static void set_name(oop mname, oop name); 997 998 static int flags(oop mname); 999 static void set_flags(oop mname, int flags); 1000 1001 static Metadata* vmtarget(oop mname); 1002 static void set_vmtarget(oop mname, Metadata* target); 1003 1004 static intptr_t vmindex(oop mname); 1005 static void set_vmindex(oop mname, intptr_t index); 1006 1007 // Testers 1008 static bool is_subclass(Klass* klass) { 1009 return klass->is_subclass_of(SystemDictionary::MemberName_klass()); 1010 } 1011 static bool is_instance(oop obj) { 1012 return obj != NULL && is_subclass(obj->klass()); 1013 } 1014 1015 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1016 enum { 1017 MN_IS_METHOD = 0x00010000, // method (not constructor) 1018 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1019 MN_IS_FIELD = 0x00040000, // field 1020 MN_IS_TYPE = 0x00080000, // nested type 1021 MN_REFERENCE_KIND_SHIFT = 24, // refKind 1022 MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, 1023 // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: 1024 MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes 1025 MN_SEARCH_INTERFACES = 0x00200000 // walk implemented interfaces 1026 }; 1027 1028 // Accessors for code generation: 1029 static int clazz_offset_in_bytes() { return _clazz_offset; } 1030 static int type_offset_in_bytes() { return _type_offset; } 1031 static int name_offset_in_bytes() { return _name_offset; } 1032 static int flags_offset_in_bytes() { return _flags_offset; } 1033 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1034 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1035 }; 1036 1037 1038 // Interface to java.lang.invoke.MethodType objects 1039 1040 class java_lang_invoke_MethodType: AllStatic { 1041 friend class JavaClasses; 1042 1043 private: 1044 static int _rtype_offset; 1045 static int _ptypes_offset; 1046 1047 static void compute_offsets(); 1048 1049 public: 1050 // Accessors 1051 static oop rtype(oop mt); 1052 static objArrayOop ptypes(oop mt); 1053 1054 static oop ptype(oop mt, int index); 1055 static int ptype_count(oop mt); 1056 1057 static int ptype_slot_count(oop mt); // extra counts for long/double 1058 static int rtype_slot_count(oop mt); // extra counts for long/double 1059 1060 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1061 static void print_signature(oop mt, outputStream* st); 1062 1063 static bool is_instance(oop obj) { 1064 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass(); 1065 } 1066 1067 static bool equals(oop mt1, oop mt2); 1068 1069 // Accessors for code generation: 1070 static int rtype_offset_in_bytes() { return _rtype_offset; } 1071 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1072 }; 1073 1074 1075 // Interface to java.lang.invoke.CallSite objects 1076 1077 class java_lang_invoke_CallSite: AllStatic { 1078 friend class JavaClasses; 1079 1080 private: 1081 static int _target_offset; 1082 1083 static void compute_offsets(); 1084 1085 public: 1086 // Accessors 1087 static oop target( oop site) { return site->obj_field( _target_offset); } 1088 static void set_target( oop site, oop target) { site->obj_field_put( _target_offset, target); } 1089 1090 static volatile oop target_volatile(oop site) { return site->obj_field_volatile( _target_offset); } 1091 static void set_target_volatile(oop site, oop target) { site->obj_field_put_volatile(_target_offset, target); } 1092 1093 // Testers 1094 static bool is_subclass(Klass* klass) { 1095 return klass->is_subclass_of(SystemDictionary::CallSite_klass()); 1096 } 1097 static bool is_instance(oop obj) { 1098 return obj != NULL && is_subclass(obj->klass()); 1099 } 1100 1101 // Accessors for code generation: 1102 static int target_offset_in_bytes() { return _target_offset; } 1103 }; 1104 1105 1106 // Interface to java.security.AccessControlContext objects 1107 1108 class java_security_AccessControlContext: AllStatic { 1109 private: 1110 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1111 // so we compute the offsets at startup rather than hard-wiring them. 1112 static int _context_offset; 1113 static int _privilegedContext_offset; 1114 static int _isPrivileged_offset; 1115 1116 static void compute_offsets(); 1117 public: 1118 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1119 1120 // Debugging/initialization 1121 friend class JavaClasses; 1122 }; 1123 1124 1125 // Interface to java.lang.ClassLoader objects 1126 1127 #define CLASSLOADER_INJECTED_FIELDS(macro) \ 1128 macro(java_lang_ClassLoader, loader_data, intptr_signature, false) 1129 1130 class java_lang_ClassLoader : AllStatic { 1131 private: 1132 // The fake offsets are added by the class loader when java.lang.Class is loaded 1133 enum { 1134 hc_parent_offset = 0 1135 }; 1136 static int _loader_data_offset; 1137 static bool offsets_computed; 1138 static int parent_offset; 1139 static int parallelCapable_offset; 1140 static int fullyConcurrent_offset; 1141 1142 public: 1143 static void compute_offsets(); 1144 1145 static ClassLoaderData** loader_data_addr(oop loader); 1146 static ClassLoaderData* loader_data(oop loader); 1147 1148 static oop parent(oop loader); 1149 static bool isAncestor(oop loader, oop cl); 1150 1151 // Support for parallelCapable field 1152 static bool parallelCapable(oop the_class_mirror); 1153 1154 // Support for fullyConcurrent field 1155 static bool fullyConcurrent(oop the_class_mirror); 1156 1157 static bool is_trusted_loader(oop loader); 1158 1159 // Fix for 4474172 1160 static oop non_reflection_class_loader(oop loader); 1161 1162 // Testers 1163 static bool is_subclass(Klass* klass) { 1164 return klass->is_subclass_of(SystemDictionary::ClassLoader_klass()); 1165 } 1166 static bool is_instance(oop obj) { 1167 return obj != NULL && is_subclass(obj->klass()); 1168 } 1169 1170 // Debugging 1171 friend class JavaClasses; 1172 friend class ClassFileParser; // access to number_of_fake_fields 1173 }; 1174 1175 1176 // Interface to java.lang.System objects 1177 1178 class java_lang_System : AllStatic { 1179 private: 1180 enum { 1181 hc_static_in_offset = 0, 1182 hc_static_out_offset = 1, 1183 hc_static_err_offset = 2 1184 }; 1185 1186 static int static_in_offset; 1187 static int static_out_offset; 1188 static int static_err_offset; 1189 1190 public: 1191 static int in_offset_in_bytes(); 1192 static int out_offset_in_bytes(); 1193 static int err_offset_in_bytes(); 1194 1195 // Debugging 1196 friend class JavaClasses; 1197 }; 1198 1199 1200 // Interface to java.lang.StackTraceElement objects 1201 1202 class java_lang_StackTraceElement: AllStatic { 1203 private: 1204 enum { 1205 hc_declaringClass_offset = 0, 1206 hc_methodName_offset = 1, 1207 hc_fileName_offset = 2, 1208 hc_lineNumber_offset = 3 1209 }; 1210 1211 static int declaringClass_offset; 1212 static int methodName_offset; 1213 static int fileName_offset; 1214 static int lineNumber_offset; 1215 1216 public: 1217 // Setters 1218 static void set_declaringClass(oop element, oop value); 1219 static void set_methodName(oop element, oop value); 1220 static void set_fileName(oop element, oop value); 1221 static void set_lineNumber(oop element, int value); 1222 1223 // Create an instance of StackTraceElement 1224 static oop create(methodHandle m, int bci, TRAPS); 1225 1226 // Debugging 1227 friend class JavaClasses; 1228 }; 1229 1230 1231 // Interface to java.lang.AssertionStatusDirectives objects 1232 1233 class java_lang_AssertionStatusDirectives: AllStatic { 1234 private: 1235 enum { 1236 hc_classes_offset, 1237 hc_classEnabled_offset, 1238 hc_packages_offset, 1239 hc_packageEnabled_offset, 1240 hc_deflt_offset 1241 }; 1242 1243 static int classes_offset; 1244 static int classEnabled_offset; 1245 static int packages_offset; 1246 static int packageEnabled_offset; 1247 static int deflt_offset; 1248 1249 public: 1250 // Setters 1251 static void set_classes(oop obj, oop val); 1252 static void set_classEnabled(oop obj, oop val); 1253 static void set_packages(oop obj, oop val); 1254 static void set_packageEnabled(oop obj, oop val); 1255 static void set_deflt(oop obj, bool val); 1256 // Debugging 1257 friend class JavaClasses; 1258 }; 1259 1260 1261 class java_nio_Buffer: AllStatic { 1262 private: 1263 static int _limit_offset; 1264 1265 public: 1266 static int limit_offset(); 1267 static void compute_offsets(); 1268 }; 1269 1270 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1271 private: 1272 static int _owner_offset; 1273 public: 1274 static void initialize(TRAPS); 1275 static oop get_owner_threadObj(oop obj); 1276 }; 1277 1278 // Use to declare fields that need to be injected into Java classes 1279 // for the JVM to use. The name_index and signature_index are 1280 // declared in vmSymbols. The may_be_java flag is used to declare 1281 // fields that might already exist in Java but should be injected if 1282 // they don't. Otherwise the field is unconditionally injected and 1283 // the JVM uses the injected one. This is to ensure that name 1284 // collisions don't occur. In general may_be_java should be false 1285 // unless there's a good reason. 1286 1287 class InjectedField { 1288 public: 1289 const SystemDictionary::WKID klass_id; 1290 const vmSymbols::SID name_index; 1291 const vmSymbols::SID signature_index; 1292 const bool may_be_java; 1293 1294 1295 Klass* klass() const { return SystemDictionary::well_known_klass(klass_id); } 1296 Symbol* name() const { return lookup_symbol(name_index); } 1297 Symbol* signature() const { return lookup_symbol(signature_index); } 1298 1299 int compute_offset(); 1300 1301 // Find the Symbol for this index 1302 static Symbol* lookup_symbol(int symbol_index) { 1303 return vmSymbols::symbol_at((vmSymbols::SID)symbol_index); 1304 } 1305 }; 1306 1307 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \ 1308 klass##_##name##_enum, 1309 1310 #define ALL_INJECTED_FIELDS(macro) \ 1311 CLASS_INJECTED_FIELDS(macro) \ 1312 CLASSLOADER_INJECTED_FIELDS(macro) \ 1313 MEMBERNAME_INJECTED_FIELDS(macro) 1314 1315 // Interface to hard-coded offset checking 1316 1317 class JavaClasses : AllStatic { 1318 private: 1319 1320 static InjectedField _injected_fields[]; 1321 1322 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1323 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1324 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1325 1326 public: 1327 enum InjectedFieldID { 1328 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM) 1329 MAX_enum 1330 }; 1331 1332 static int compute_injected_offset(InjectedFieldID id); 1333 1334 static void compute_hard_coded_offsets(); 1335 static void compute_offsets(); 1336 static void check_offsets() PRODUCT_RETURN; 1337 1338 static InjectedField* get_injected(Symbol* class_name, int* field_count); 1339 }; 1340 1341 #undef DECLARE_INJECTED_FIELD_ENUM 1342 1343 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP