1 /* 2 * Copyright (c) 1997, 2011, 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 enum { 56 hc_value_offset = 0, 57 hc_offset_offset = 1 58 //hc_count_offset = 2 -- not a word-scaled offset 59 //hc_hash_offset = 3 -- not a word-scaled offset 60 }; 61 62 static int value_offset; 63 static int offset_offset; 64 static int count_offset; 65 static int hash_offset; 66 67 static Handle basic_create(int length, bool tenured, TRAPS); 68 static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS); 69 70 static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset, (oop)buffer); } 71 static void set_offset(oop string, int offset) { string->int_field_put(offset_offset, offset); } 72 static void set_count( oop string, int count) { string->int_field_put(count_offset, count); } 73 74 public: 75 // Instance creation 76 static Handle create_from_unicode(jchar* unicode, int len, TRAPS); 77 static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS); 78 static oop create_oop_from_unicode(jchar* unicode, int len, TRAPS); 79 static Handle create_from_str(const char* utf8_str, TRAPS); 80 static oop create_oop_from_str(const char* utf8_str, TRAPS); 81 static Handle create_from_symbol(Symbol* symbol, TRAPS); 82 static Handle create_from_platform_dependent_str(const char* str, TRAPS); 83 static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS); 84 85 static int value_offset_in_bytes() { return value_offset; } 86 static int count_offset_in_bytes() { return count_offset; } 87 static int offset_offset_in_bytes() { return offset_offset; } 88 static int hash_offset_in_bytes() { return hash_offset; } 89 90 // Accessors 91 static typeArrayOop value(oop java_string) { 92 assert(is_instance(java_string), "must be java_string"); 93 return (typeArrayOop) java_string->obj_field(value_offset); 94 } 95 static int offset(oop java_string) { 96 assert(is_instance(java_string), "must be java_string"); 97 return java_string->int_field(offset_offset); 98 } 99 static int length(oop java_string) { 100 assert(is_instance(java_string), "must be java_string"); 101 return java_string->int_field(count_offset); 102 } 103 static int utf8_length(oop java_string); 104 105 // String converters 106 static char* as_utf8_string(oop java_string); 107 static char* as_utf8_string(oop java_string, char* buf, int buflen); 108 static char* as_utf8_string(oop java_string, int start, int len); 109 static char* as_platform_dependent_str(Handle java_string, TRAPS); 110 static jchar* as_unicode_string(oop java_string, int& length); 111 112 // Compute the hash value for a java.lang.String object which would 113 // contain the characters passed in. This hash value is used for at 114 // least two purposes. 115 // 116 // (a) As the hash value used by the StringTable for bucket selection 117 // and comparison (stored in the HashtableEntry structures). This 118 // is used in the String.intern() method. 119 // 120 // (b) As the hash value used by the String object itself, in 121 // String.hashCode(). This value is normally calculate in Java code 122 // in the String.hashCode method(), but is precomputed for String 123 // objects in the shared archive file. 124 // 125 // For this reason, THIS ALGORITHM MUST MATCH String.hashCode(). 126 static unsigned int hash_string(jchar* s, int len) { 127 unsigned int h = 0; 128 while (len-- > 0) { 129 h = 31*h + (unsigned int) *s; 130 s++; 131 } 132 return h; 133 } 134 static unsigned int hash_string(oop java_string); 135 136 static bool equals(oop java_string, jchar* chars, int len); 137 138 // Conversion between '.' and '/' formats 139 static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); } 140 static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); } 141 142 // Conversion 143 static Symbol* as_symbol(Handle java_string, TRAPS); 144 static Symbol* as_symbol_or_null(oop java_string); 145 146 // Testers 147 static bool is_instance(oop obj) { 148 return obj != NULL && obj->klass() == SystemDictionary::String_klass(); 149 } 150 151 // Debugging 152 static void print(Handle java_string, outputStream* st); 153 friend class JavaClasses; 154 }; 155 156 157 // Interface to java.lang.Class objects 158 159 class java_lang_Class : AllStatic { 160 friend class VMStructs; 161 private: 162 // The fake offsets are added by the class loader when java.lang.Class is loaded 163 164 enum { 165 hc_number_of_fake_oop_fields = 3, 166 hc_number_of_fake_int_fields = 2 167 }; 168 169 static int klass_offset; 170 static int resolved_constructor_offset; 171 static int array_klass_offset; 172 static int number_of_fake_oop_fields; 173 174 static int oop_size_offset; 175 static int static_oop_field_count_offset; 176 177 static void compute_offsets(); 178 static bool offsets_computed; 179 static int classRedefinedCount_offset; 180 static int parallelCapable_offset; 181 182 public: 183 // Instance creation 184 static oop create_mirror(KlassHandle k, TRAPS); 185 static void fixup_mirror(KlassHandle k, TRAPS); 186 static oop create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS); 187 // Conversion 188 static klassOop as_klassOop(oop java_class); 189 static BasicType as_BasicType(oop java_class, klassOop* reference_klass = NULL); 190 static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) { 191 klassOop refk_oop = NULL; 192 BasicType result = as_BasicType(java_class, &refk_oop); 193 (*reference_klass) = KlassHandle(refk_oop); 194 return result; 195 } 196 static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS); 197 static void print_signature(oop java_class, outputStream *st); 198 // Testing 199 static bool is_instance(oop obj) { 200 return obj != NULL && obj->klass() == SystemDictionary::Class_klass(); 201 } 202 static bool is_primitive(oop java_class); 203 static BasicType primitive_type(oop java_class); 204 static oop primitive_mirror(BasicType t); 205 // JVM_NewInstance support 206 static methodOop resolved_constructor(oop java_class); 207 static void set_resolved_constructor(oop java_class, methodOop constructor); 208 // JVM_NewArray support 209 static klassOop array_klass(oop java_class); 210 static void set_array_klass(oop java_class, klassOop klass); 211 // compiler support for class operations 212 static int klass_offset_in_bytes() { return klass_offset; } 213 static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; } 214 static int array_klass_offset_in_bytes() { return array_klass_offset; } 215 // Support for classRedefinedCount field 216 static int classRedefinedCount(oop the_class_mirror); 217 static void set_classRedefinedCount(oop the_class_mirror, int value); 218 // Support for parallelCapable field 219 static bool parallelCapable(oop the_class_mirror); 220 221 static int oop_size(oop java_class); 222 static void set_oop_size(oop java_class, int size); 223 static int static_oop_field_count(oop java_class); 224 static void set_static_oop_field_count(oop java_class, int size); 225 226 // Debugging 227 friend class JavaClasses; 228 friend class instanceKlass; // verification code accesses offsets 229 friend class ClassFileParser; // access to number_of_fake_fields 230 }; 231 232 // Interface to java.lang.Thread objects 233 234 class java_lang_Thread : AllStatic { 235 private: 236 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 237 // so we compute the offsets at startup rather than hard-wiring them. 238 static int _name_offset; 239 static int _group_offset; 240 static int _contextClassLoader_offset; 241 static int _inheritedAccessControlContext_offset; 242 static int _priority_offset; 243 static int _eetop_offset; 244 static int _daemon_offset; 245 static int _stillborn_offset; 246 static int _stackSize_offset; 247 static int _tid_offset; 248 static int _thread_status_offset; 249 static int _park_blocker_offset; 250 static int _park_event_offset ; 251 252 static void compute_offsets(); 253 254 public: 255 // Instance creation 256 static oop create(); 257 // Returns the JavaThread associated with the thread obj 258 static JavaThread* thread(oop java_thread); 259 // Set JavaThread for instance 260 static void set_thread(oop java_thread, JavaThread* thread); 261 // Name 262 static typeArrayOop name(oop java_thread); 263 static void set_name(oop java_thread, typeArrayOop name); 264 // Priority 265 static ThreadPriority priority(oop java_thread); 266 static void set_priority(oop java_thread, ThreadPriority priority); 267 // Thread group 268 static oop threadGroup(oop java_thread); 269 // Stillborn 270 static bool is_stillborn(oop java_thread); 271 static void set_stillborn(oop java_thread); 272 // Alive (NOTE: this is not really a field, but provides the correct 273 // definition without doing a Java call) 274 static bool is_alive(oop java_thread); 275 // Daemon 276 static bool is_daemon(oop java_thread); 277 static void set_daemon(oop java_thread); 278 // Context ClassLoader 279 static oop context_class_loader(oop java_thread); 280 // Control context 281 static oop inherited_access_control_context(oop java_thread); 282 // Stack size hint 283 static jlong stackSize(oop java_thread); 284 // Thread ID 285 static jlong thread_id(oop java_thread); 286 287 // Blocker object responsible for thread parking 288 static oop park_blocker(oop java_thread); 289 290 // Pointer to type-stable park handler, encoded as jlong. 291 // Should be set when apparently null 292 // For details, see unsafe.cpp Unsafe_Unpark 293 static jlong park_event(oop java_thread); 294 static bool set_park_event(oop java_thread, jlong ptr); 295 296 // Java Thread Status for JVMTI and M&M use. 297 // This thread status info is saved in threadStatus field of 298 // java.lang.Thread java class. 299 enum ThreadStatus { 300 NEW = 0, 301 RUNNABLE = JVMTI_THREAD_STATE_ALIVE + // runnable / running 302 JVMTI_THREAD_STATE_RUNNABLE, 303 SLEEPING = JVMTI_THREAD_STATE_ALIVE + // Thread.sleep() 304 JVMTI_THREAD_STATE_WAITING + 305 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 306 JVMTI_THREAD_STATE_SLEEPING, 307 IN_OBJECT_WAIT = JVMTI_THREAD_STATE_ALIVE + // Object.wait() 308 JVMTI_THREAD_STATE_WAITING + 309 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 310 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 311 IN_OBJECT_WAIT_TIMED = JVMTI_THREAD_STATE_ALIVE + // Object.wait(long) 312 JVMTI_THREAD_STATE_WAITING + 313 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 314 JVMTI_THREAD_STATE_IN_OBJECT_WAIT, 315 PARKED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park() 316 JVMTI_THREAD_STATE_WAITING + 317 JVMTI_THREAD_STATE_WAITING_INDEFINITELY + 318 JVMTI_THREAD_STATE_PARKED, 319 PARKED_TIMED = JVMTI_THREAD_STATE_ALIVE + // LockSupport.park(long) 320 JVMTI_THREAD_STATE_WAITING + 321 JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT + 322 JVMTI_THREAD_STATE_PARKED, 323 BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE + // (re-)entering a synchronization block 324 JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER, 325 TERMINATED = JVMTI_THREAD_STATE_TERMINATED 326 }; 327 // Write thread status info to threadStatus field of java.lang.Thread. 328 static void set_thread_status(oop java_thread_oop, ThreadStatus status); 329 // Read thread status info from threadStatus field of java.lang.Thread. 330 static ThreadStatus get_thread_status(oop java_thread_oop); 331 332 static const char* thread_status_name(oop java_thread_oop); 333 334 // Debugging 335 friend class JavaClasses; 336 }; 337 338 // Interface to java.lang.ThreadGroup objects 339 340 class java_lang_ThreadGroup : AllStatic { 341 private: 342 static int _parent_offset; 343 static int _name_offset; 344 static int _threads_offset; 345 static int _groups_offset; 346 static int _maxPriority_offset; 347 static int _destroyed_offset; 348 static int _daemon_offset; 349 static int _vmAllowSuspension_offset; 350 static int _nthreads_offset; 351 static int _ngroups_offset; 352 353 static void compute_offsets(); 354 355 public: 356 // parent ThreadGroup 357 static oop parent(oop java_thread_group); 358 // name 359 static typeArrayOop name(oop java_thread_group); 360 // ("name as oop" accessor is not necessary) 361 // Number of threads in group 362 static int nthreads(oop java_thread_group); 363 // threads 364 static objArrayOop threads(oop java_thread_group); 365 // Number of threads in group 366 static int ngroups(oop java_thread_group); 367 // groups 368 static objArrayOop groups(oop java_thread_group); 369 // maxPriority in group 370 static ThreadPriority maxPriority(oop java_thread_group); 371 // Destroyed 372 static bool is_destroyed(oop java_thread_group); 373 // Daemon 374 static bool is_daemon(oop java_thread_group); 375 // vmAllowSuspension 376 static bool is_vmAllowSuspension(oop java_thread_group); 377 // Debugging 378 friend class JavaClasses; 379 }; 380 381 382 383 // Interface to java.lang.Throwable objects 384 385 class java_lang_Throwable: AllStatic { 386 friend class BacktraceBuilder; 387 388 private: 389 // Offsets 390 enum { 391 hc_backtrace_offset = 0, 392 hc_detailMessage_offset = 1, 393 hc_cause_offset = 2, // New since 1.4 394 hc_stackTrace_offset = 3 // New since 1.4 395 }; 396 enum { 397 hc_static_unassigned_stacktrace_offset = 0 // New since 1.7 398 }; 399 // Trace constants 400 enum { 401 trace_methods_offset = 0, 402 trace_bcis_offset = 1, 403 trace_next_offset = 2, 404 trace_size = 3, 405 trace_chunk_size = 32 406 }; 407 408 static int backtrace_offset; 409 static int detailMessage_offset; 410 static int cause_offset; 411 static int stackTrace_offset; 412 static int static_unassigned_stacktrace_offset; 413 414 // Printing 415 static char* print_stack_element_to_buffer(methodOop method, int bci); 416 static void print_to_stream(Handle stream, const char* str); 417 // StackTrace (programmatic access, new since 1.4) 418 static void clear_stacktrace(oop throwable); 419 // No stack trace available 420 static const char* no_stack_trace_message(); 421 // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed) 422 static void set_stacktrace(oop throwable, oop st_element_array); 423 static oop unassigned_stacktrace(); 424 425 public: 426 // Backtrace 427 static oop backtrace(oop throwable); 428 static void set_backtrace(oop throwable, oop value); 429 // Needed by JVMTI to filter out this internal field. 430 static int get_backtrace_offset() { return backtrace_offset;} 431 static int get_detailMessage_offset() { return detailMessage_offset;} 432 // Message 433 static oop message(oop throwable); 434 static oop message(Handle throwable); 435 static void set_message(oop throwable, oop value); 436 // Print stack trace stored in exception by call-back to Java 437 // Note: this is no longer used in Merlin, but we still suppport 438 // it for compatibility. 439 static void print_stack_trace(oop throwable, oop print_stream); 440 static void print_stack_element(Handle stream, methodOop method, int bci); 441 static void print_stack_element(outputStream *st, methodOop method, int bci); 442 static void print_stack_usage(Handle stream); 443 444 // Allocate space for backtrace (created but stack trace not filled in) 445 static void allocate_backtrace(Handle throwable, TRAPS); 446 // Fill in current stack trace for throwable with preallocated backtrace (no GC) 447 static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable); 448 // Fill in current stack trace, can cause GC 449 static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS); 450 static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle()); 451 // Programmatic access to stack trace 452 static oop get_stack_trace_element(oop throwable, int index, TRAPS); 453 static int get_stack_trace_depth(oop throwable, TRAPS); 454 // Printing 455 static void print(oop throwable, outputStream* st); 456 static void print(Handle throwable, outputStream* st); 457 static void print_stack_trace(oop throwable, outputStream* st); 458 // Debugging 459 friend class JavaClasses; 460 }; 461 462 463 // Interface to java.lang.reflect.AccessibleObject objects 464 465 class java_lang_reflect_AccessibleObject: AllStatic { 466 private: 467 // Note that to reduce dependencies on the JDK we compute these 468 // offsets at run-time. 469 static int override_offset; 470 471 static void compute_offsets(); 472 473 public: 474 // Accessors 475 static jboolean override(oop reflect); 476 static void set_override(oop reflect, jboolean value); 477 478 // Debugging 479 friend class JavaClasses; 480 }; 481 482 483 // Interface to java.lang.reflect.Method objects 484 485 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject { 486 private: 487 // Note that to reduce dependencies on the JDK we compute these 488 // offsets at run-time. 489 static int clazz_offset; 490 static int name_offset; 491 static int returnType_offset; 492 static int parameterTypes_offset; 493 static int exceptionTypes_offset; 494 static int slot_offset; 495 static int modifiers_offset; 496 static int signature_offset; 497 static int annotations_offset; 498 static int parameter_annotations_offset; 499 static int annotation_default_offset; 500 501 static void compute_offsets(); 502 503 public: 504 // Allocation 505 static Handle create(TRAPS); 506 507 // Accessors 508 static oop clazz(oop reflect); 509 static void set_clazz(oop reflect, oop value); 510 511 static oop name(oop method); 512 static void set_name(oop method, oop value); 513 514 static oop return_type(oop method); 515 static void set_return_type(oop method, oop value); 516 517 static oop parameter_types(oop method); 518 static void set_parameter_types(oop method, oop value); 519 520 static oop exception_types(oop method); 521 static void set_exception_types(oop method, oop value); 522 523 static int slot(oop reflect); 524 static void set_slot(oop reflect, int value); 525 526 static int modifiers(oop method); 527 static void set_modifiers(oop method, int value); 528 529 static bool has_signature_field(); 530 static oop signature(oop method); 531 static void set_signature(oop method, oop value); 532 533 static bool has_annotations_field(); 534 static oop annotations(oop method); 535 static void set_annotations(oop method, oop value); 536 537 static bool has_parameter_annotations_field(); 538 static oop parameter_annotations(oop method); 539 static void set_parameter_annotations(oop method, oop value); 540 541 static bool has_annotation_default_field(); 542 static oop annotation_default(oop method); 543 static void set_annotation_default(oop method, oop value); 544 545 // Debugging 546 friend class JavaClasses; 547 }; 548 549 550 // Interface to java.lang.reflect.Constructor objects 551 552 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject { 553 private: 554 // Note that to reduce dependencies on the JDK we compute these 555 // offsets at run-time. 556 static int clazz_offset; 557 static int parameterTypes_offset; 558 static int exceptionTypes_offset; 559 static int slot_offset; 560 static int modifiers_offset; 561 static int signature_offset; 562 static int annotations_offset; 563 static int parameter_annotations_offset; 564 565 static void compute_offsets(); 566 567 public: 568 // Allocation 569 static Handle create(TRAPS); 570 571 // Accessors 572 static oop clazz(oop reflect); 573 static void set_clazz(oop reflect, oop value); 574 575 static oop parameter_types(oop constructor); 576 static void set_parameter_types(oop constructor, oop value); 577 578 static oop exception_types(oop constructor); 579 static void set_exception_types(oop constructor, oop value); 580 581 static int slot(oop reflect); 582 static void set_slot(oop reflect, int value); 583 584 static int modifiers(oop constructor); 585 static void set_modifiers(oop constructor, int value); 586 587 static bool has_signature_field(); 588 static oop signature(oop constructor); 589 static void set_signature(oop constructor, oop value); 590 591 static bool has_annotations_field(); 592 static oop annotations(oop constructor); 593 static void set_annotations(oop constructor, oop value); 594 595 static bool has_parameter_annotations_field(); 596 static oop parameter_annotations(oop method); 597 static void set_parameter_annotations(oop method, oop value); 598 599 // Debugging 600 friend class JavaClasses; 601 }; 602 603 604 // Interface to java.lang.reflect.Field objects 605 606 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject { 607 private: 608 // Note that to reduce dependencies on the JDK we compute these 609 // offsets at run-time. 610 static int clazz_offset; 611 static int name_offset; 612 static int type_offset; 613 static int slot_offset; 614 static int modifiers_offset; 615 static int signature_offset; 616 static int 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 name(oop field); 629 static void set_name(oop field, oop value); 630 631 static oop type(oop field); 632 static void set_type(oop field, oop value); 633 634 static int slot(oop reflect); 635 static void set_slot(oop reflect, int value); 636 637 static int modifiers(oop field); 638 static void set_modifiers(oop field, 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_annotation_default_field(); 653 static oop annotation_default(oop method); 654 static void set_annotation_default(oop method, oop value); 655 656 // Debugging 657 friend class JavaClasses; 658 }; 659 660 // Interface to sun.reflect.ConstantPool objects 661 class sun_reflect_ConstantPool { 662 private: 663 // Note that to reduce dependencies on the JDK we compute these 664 // offsets at run-time. 665 static int _cp_oop_offset; 666 667 static void compute_offsets(); 668 669 public: 670 // Allocation 671 static Handle create(TRAPS); 672 673 // Accessors 674 static oop cp_oop(oop reflect); 675 static void set_cp_oop(oop reflect, oop value); 676 static int cp_oop_offset() { 677 return _cp_oop_offset; 678 } 679 680 // Debugging 681 friend class JavaClasses; 682 }; 683 684 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects 685 class sun_reflect_UnsafeStaticFieldAccessorImpl { 686 private: 687 static int _base_offset; 688 static void compute_offsets(); 689 690 public: 691 static int base_offset() { 692 return _base_offset; 693 } 694 695 // Debugging 696 friend class JavaClasses; 697 }; 698 699 // Interface to java.lang primitive type boxing objects: 700 // - java.lang.Boolean 701 // - java.lang.Character 702 // - java.lang.Float 703 // - java.lang.Double 704 // - java.lang.Byte 705 // - java.lang.Short 706 // - java.lang.Integer 707 // - java.lang.Long 708 709 // This could be separated out into 8 individual classes. 710 711 class java_lang_boxing_object: AllStatic { 712 private: 713 enum { 714 hc_value_offset = 0 715 }; 716 static int value_offset; 717 static int long_value_offset; 718 719 static oop initialize_and_allocate(BasicType type, TRAPS); 720 public: 721 // Allocation. Returns a boxed value, or NULL for invalid type. 722 static oop create(BasicType type, jvalue* value, TRAPS); 723 // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop. 724 static BasicType get_value(oop box, jvalue* value); 725 static BasicType set_value(oop box, jvalue* value); 726 static BasicType basic_type(oop box); 727 static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; } 728 static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; } 729 static void print(oop box, outputStream* st) { jvalue value; print(get_value(box, &value), &value, st); } 730 static void print(BasicType type, jvalue* value, outputStream* st); 731 732 static int value_offset_in_bytes(BasicType type) { 733 return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset : 734 value_offset; 735 } 736 737 // Debugging 738 friend class JavaClasses; 739 }; 740 741 742 743 // Interface to java.lang.ref.Reference objects 744 745 class java_lang_ref_Reference: AllStatic { 746 public: 747 enum { 748 hc_referent_offset = 0, 749 hc_queue_offset = 1, 750 hc_next_offset = 2, 751 hc_discovered_offset = 3 // Is not last, see SoftRefs. 752 }; 753 enum { 754 hc_static_lock_offset = 0, 755 hc_static_pending_offset = 1 756 }; 757 758 static int referent_offset; 759 static int queue_offset; 760 static int next_offset; 761 static int discovered_offset; 762 static int static_lock_offset; 763 static int static_pending_offset; 764 static int number_of_fake_oop_fields; 765 766 // Accessors 767 static oop referent(oop ref) { 768 return ref->obj_field(referent_offset); 769 } 770 static void set_referent(oop ref, oop value) { 771 ref->obj_field_put(referent_offset, value); 772 } 773 static void set_referent_raw(oop ref, oop value) { 774 ref->obj_field_raw_put(referent_offset, value); 775 } 776 static HeapWord* referent_addr(oop ref) { 777 return ref->obj_field_addr<HeapWord>(referent_offset); 778 } 779 static oop next(oop ref) { 780 return ref->obj_field(next_offset); 781 } 782 static void set_next(oop ref, oop value) { 783 ref->obj_field_put(next_offset, value); 784 } 785 static void set_next_raw(oop ref, oop value) { 786 ref->obj_field_raw_put(next_offset, value); 787 } 788 static HeapWord* next_addr(oop ref) { 789 return ref->obj_field_addr<HeapWord>(next_offset); 790 } 791 static oop discovered(oop ref) { 792 return ref->obj_field(discovered_offset); 793 } 794 static void set_discovered(oop ref, oop value) { 795 ref->obj_field_put(discovered_offset, value); 796 } 797 static void set_discovered_raw(oop ref, oop value) { 798 ref->obj_field_raw_put(discovered_offset, value); 799 } 800 static HeapWord* discovered_addr(oop ref) { 801 return ref->obj_field_addr<HeapWord>(discovered_offset); 802 } 803 // Accessors for statics 804 static oop pending_list_lock(); 805 static oop pending_list(); 806 807 static HeapWord* pending_list_addr(); 808 }; 809 810 811 // Interface to java.lang.ref.SoftReference objects 812 813 class java_lang_ref_SoftReference: public java_lang_ref_Reference { 814 public: 815 enum { 816 // The timestamp is a long field and may need to be adjusted for alignment. 817 hc_timestamp_offset = hc_discovered_offset + 1 818 }; 819 enum { 820 hc_static_clock_offset = 0 821 }; 822 823 static int timestamp_offset; 824 static int static_clock_offset; 825 826 // Accessors 827 static jlong timestamp(oop ref); 828 829 // Accessors for statics 830 static jlong clock(); 831 static void set_clock(jlong value); 832 }; 833 834 835 // Interface to java.lang.invoke.MethodHandle objects 836 837 class MethodHandleEntry; 838 839 class java_lang_invoke_MethodHandle: AllStatic { 840 friend class JavaClasses; 841 842 private: 843 static int _vmentry_offset; // assembly code trampoline for MH 844 static int _vmtarget_offset; // class-specific target reference 845 static int _type_offset; // the MethodType of this MH 846 static int _vmslots_offset; // OPTIONAL hoisted type.form.vmslots 847 848 static void compute_offsets(); 849 850 public: 851 // Accessors 852 static oop type(oop mh); 853 static void set_type(oop mh, oop mtype); 854 855 static oop vmtarget(oop mh); 856 static void set_vmtarget(oop mh, oop target); 857 858 static MethodHandleEntry* vmentry(oop mh); 859 static void set_vmentry(oop mh, MethodHandleEntry* data); 860 861 static int vmslots(oop mh); 862 static void init_vmslots(oop mh); 863 static int compute_vmslots(oop mh); 864 865 // Testers 866 static bool is_subclass(klassOop klass) { 867 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MethodHandle_klass()); 868 } 869 static bool is_instance(oop obj) { 870 return obj != NULL && is_subclass(obj->klass()); 871 } 872 873 // Accessors for code generation: 874 static int type_offset_in_bytes() { return _type_offset; } 875 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 876 static int vmentry_offset_in_bytes() { return _vmentry_offset; } 877 static int vmslots_offset_in_bytes() { return _vmslots_offset; } 878 }; 879 880 class java_lang_invoke_DirectMethodHandle: public java_lang_invoke_MethodHandle { 881 friend class JavaClasses; 882 883 private: 884 // _vmtarget_offset; // method or class or interface 885 static int _vmindex_offset; // negative or vtable idx or itable idx 886 static void compute_offsets(); 887 888 public: 889 // Accessors 890 static int vmindex(oop mh); 891 static void set_vmindex(oop mh, int index); 892 893 // Testers 894 static bool is_subclass(klassOop klass) { 895 return Klass::cast(klass)->is_subclass_of(SystemDictionary::DirectMethodHandle_klass()); 896 } 897 static bool is_instance(oop obj) { 898 return obj != NULL && is_subclass(obj->klass()); 899 } 900 901 // Accessors for code generation: 902 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 903 }; 904 905 class java_lang_invoke_BoundMethodHandle: public java_lang_invoke_MethodHandle { 906 friend class JavaClasses; 907 908 private: 909 static int _argument_offset; // argument value bound into this MH 910 static int _vmargslot_offset; // relevant argument slot (<= vmslots) 911 static void compute_offsets(); 912 913 public: 914 static oop argument(oop mh); 915 static void set_argument(oop mh, oop ref); 916 917 static jint vmargslot(oop mh); 918 static void set_vmargslot(oop mh, jint slot); 919 920 // Testers 921 static bool is_subclass(klassOop klass) { 922 return Klass::cast(klass)->is_subclass_of(SystemDictionary::BoundMethodHandle_klass()); 923 } 924 static bool is_instance(oop obj) { 925 return obj != NULL && is_subclass(obj->klass()); 926 } 927 928 static int argument_offset_in_bytes() { return _argument_offset; } 929 static int vmargslot_offset_in_bytes() { return _vmargslot_offset; } 930 }; 931 932 class java_lang_invoke_AdapterMethodHandle: public java_lang_invoke_BoundMethodHandle { 933 friend class JavaClasses; 934 935 private: 936 static int _conversion_offset; // type of conversion to apply 937 static void compute_offsets(); 938 939 public: 940 static int conversion(oop mh); 941 static void set_conversion(oop mh, int conv); 942 943 // Testers 944 static bool is_subclass(klassOop klass) { 945 return Klass::cast(klass)->is_subclass_of(SystemDictionary::AdapterMethodHandle_klass()); 946 } 947 static bool is_instance(oop obj) { 948 return obj != NULL && is_subclass(obj->klass()); 949 } 950 951 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 952 enum { 953 OP_RETYPE_ONLY = 0x0, // no argument changes; straight retype 954 OP_RETYPE_RAW = 0x1, // straight retype, trusted (void->int, Object->T) 955 OP_CHECK_CAST = 0x2, // ref-to-ref conversion; requires a Class argument 956 OP_PRIM_TO_PRIM = 0x3, // converts from one primitive to another 957 OP_REF_TO_PRIM = 0x4, // unboxes a wrapper to produce a primitive 958 OP_PRIM_TO_REF = 0x5, // boxes a primitive into a wrapper 959 OP_SWAP_ARGS = 0x6, // swap arguments (vminfo is 2nd arg) 960 OP_ROT_ARGS = 0x7, // rotate arguments (vminfo is displaced arg) 961 OP_DUP_ARGS = 0x8, // duplicates one or more arguments (at TOS) 962 OP_DROP_ARGS = 0x9, // remove one or more argument slots 963 OP_COLLECT_ARGS = 0xA, // combine arguments using an auxiliary function 964 OP_SPREAD_ARGS = 0xB, // expand in place a varargs array (of known size) 965 OP_FOLD_ARGS = 0xC, // combine but do not remove arguments; prepend result 966 //OP_UNUSED_13 = 0xD, // unused code, perhaps for reified argument lists 967 CONV_OP_LIMIT = 0xE, // limit of CONV_OP enumeration 968 969 CONV_OP_MASK = 0xF00, // this nybble contains the conversion op field 970 CONV_TYPE_MASK = 0x0F, // fits T_ADDRESS and below 971 CONV_VMINFO_MASK = 0x0FF, // LSB is reserved for JVM use 972 CONV_VMINFO_SHIFT = 0, // position of bits in CONV_VMINFO_MASK 973 CONV_OP_SHIFT = 8, // position of bits in CONV_OP_MASK 974 CONV_DEST_TYPE_SHIFT = 12, // byte 2 has the adapter BasicType (if needed) 975 CONV_SRC_TYPE_SHIFT = 16, // byte 2 has the source BasicType (if needed) 976 CONV_STACK_MOVE_SHIFT = 20, // high 12 bits give signed SP change 977 CONV_STACK_MOVE_MASK = (1 << (32 - CONV_STACK_MOVE_SHIFT)) - 1 978 }; 979 980 static int conversion_offset_in_bytes() { return _conversion_offset; } 981 }; 982 983 984 // A simple class that maintains an invocation count 985 class java_lang_invoke_CountingMethodHandle: public java_lang_invoke_MethodHandle { 986 friend class JavaClasses; 987 988 private: 989 static int _vmcount_offset; 990 static void compute_offsets(); 991 992 public: 993 // Accessors 994 static int vmcount(oop mh); 995 static void set_vmcount(oop mh, int count); 996 997 // Testers 998 static bool is_subclass(klassOop klass) { 999 return SystemDictionary::CountingMethodHandle_klass() != NULL && 1000 Klass::cast(klass)->is_subclass_of(SystemDictionary::CountingMethodHandle_klass()); 1001 } 1002 static bool is_instance(oop obj) { 1003 return obj != NULL && is_subclass(obj->klass()); 1004 } 1005 1006 // Accessors for code generation: 1007 static int vmcount_offset_in_bytes() { return _vmcount_offset; } 1008 }; 1009 1010 1011 1012 // Interface to java.lang.invoke.MemberName objects 1013 // (These are a private interface for Java code to query the class hierarchy.) 1014 1015 class java_lang_invoke_MemberName: AllStatic { 1016 friend class JavaClasses; 1017 1018 private: 1019 // From java.lang.invoke.MemberName: 1020 // private Class<?> clazz; // class in which the method is defined 1021 // private String name; // may be null if not yet materialized 1022 // private Object type; // may be null if not yet materialized 1023 // private int flags; // modifier bits; see reflect.Modifier 1024 // private Object vmtarget; // VM-specific target value 1025 // private int vmindex; // method index within class or interface 1026 static int _clazz_offset; 1027 static int _name_offset; 1028 static int _type_offset; 1029 static int _flags_offset; 1030 static int _vmtarget_offset; 1031 static int _vmindex_offset; 1032 1033 static void compute_offsets(); 1034 1035 public: 1036 // Accessors 1037 static oop clazz(oop mname); 1038 static void set_clazz(oop mname, oop clazz); 1039 1040 static oop type(oop mname); 1041 static void set_type(oop mname, oop type); 1042 1043 static oop name(oop mname); 1044 static void set_name(oop mname, oop name); 1045 1046 static int flags(oop mname); 1047 static void set_flags(oop mname, int flags); 1048 1049 static int modifiers(oop mname) { return (u2) flags(mname); } 1050 static void set_modifiers(oop mname, int mods) 1051 { set_flags(mname, (flags(mname) &~ (u2)-1) | (u2)mods); } 1052 1053 static oop vmtarget(oop mname); 1054 static void set_vmtarget(oop mname, oop target); 1055 1056 static int vmindex(oop mname); 1057 static void set_vmindex(oop mname, int index); 1058 1059 // Testers 1060 static bool is_subclass(klassOop klass) { 1061 return Klass::cast(klass)->is_subclass_of(SystemDictionary::MemberName_klass()); 1062 } 1063 static bool is_instance(oop obj) { 1064 return obj != NULL && is_subclass(obj->klass()); 1065 } 1066 1067 // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants): 1068 enum { 1069 MN_IS_METHOD = 0x00010000, // method (not constructor) 1070 MN_IS_CONSTRUCTOR = 0x00020000, // constructor 1071 MN_IS_FIELD = 0x00040000, // field 1072 MN_IS_TYPE = 0x00080000, // nested type 1073 MN_SEARCH_SUPERCLASSES = 0x00100000, // for MHN.getMembers 1074 MN_SEARCH_INTERFACES = 0x00200000, // for MHN.getMembers 1075 VM_INDEX_UNINITIALIZED = -99 1076 }; 1077 1078 // Accessors for code generation: 1079 static int clazz_offset_in_bytes() { return _clazz_offset; } 1080 static int type_offset_in_bytes() { return _type_offset; } 1081 static int name_offset_in_bytes() { return _name_offset; } 1082 static int flags_offset_in_bytes() { return _flags_offset; } 1083 static int vmtarget_offset_in_bytes() { return _vmtarget_offset; } 1084 static int vmindex_offset_in_bytes() { return _vmindex_offset; } 1085 }; 1086 1087 1088 // Interface to java.lang.invoke.MethodType objects 1089 1090 class java_lang_invoke_MethodType: AllStatic { 1091 friend class JavaClasses; 1092 1093 private: 1094 static int _rtype_offset; 1095 static int _ptypes_offset; 1096 static int _form_offset; 1097 1098 static void compute_offsets(); 1099 1100 public: 1101 // Accessors 1102 static oop rtype(oop mt); 1103 static objArrayOop ptypes(oop mt); 1104 static oop form(oop mt); 1105 1106 static oop ptype(oop mt, int index); 1107 static int ptype_count(oop mt); 1108 1109 static Symbol* as_signature(oop mt, bool intern_if_not_found, TRAPS); 1110 static void print_signature(oop mt, outputStream* st); 1111 1112 static bool is_instance(oop obj) { 1113 return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass(); 1114 } 1115 1116 static bool equals(oop mt1, oop mt2); 1117 1118 // Accessors for code generation: 1119 static int rtype_offset_in_bytes() { return _rtype_offset; } 1120 static int ptypes_offset_in_bytes() { return _ptypes_offset; } 1121 static int form_offset_in_bytes() { return _form_offset; } 1122 }; 1123 1124 class java_lang_invoke_MethodTypeForm: AllStatic { 1125 friend class JavaClasses; 1126 1127 private: 1128 static int _vmslots_offset; // number of argument slots needed 1129 static int _vmlayout_offset; // object describing internal calling sequence 1130 static int _erasedType_offset; // erasedType = canonical MethodType 1131 static int _genericInvoker_offset; // genericInvoker = adapter for invokeGeneric 1132 1133 static void compute_offsets(); 1134 1135 public: 1136 // Accessors 1137 static int vmslots(oop mtform); 1138 static oop erasedType(oop mtform); 1139 static oop genericInvoker(oop mtform); 1140 1141 static oop vmlayout(oop mtform); 1142 static oop init_vmlayout(oop mtform, oop cookie); 1143 1144 // Accessors for code generation: 1145 static int vmslots_offset_in_bytes() { return _vmslots_offset; } 1146 static int vmlayout_offset_in_bytes() { return _vmlayout_offset; } 1147 static int erasedType_offset_in_bytes() { return _erasedType_offset; } 1148 static int genericInvoker_offset_in_bytes() { return _genericInvoker_offset; } 1149 }; 1150 1151 1152 // Interface to java.lang.invoke.CallSite objects 1153 1154 class java_lang_invoke_CallSite: AllStatic { 1155 friend class JavaClasses; 1156 1157 private: 1158 static int _target_offset; 1159 static int _caller_method_offset; 1160 static int _caller_bci_offset; 1161 1162 static void compute_offsets(); 1163 1164 public: 1165 // Accessors 1166 static oop target(oop site); 1167 static void set_target(oop site, oop target); 1168 1169 static oop caller_method(oop site); 1170 static void set_caller_method(oop site, oop ref); 1171 1172 static jint caller_bci(oop site); 1173 static void set_caller_bci(oop site, jint bci); 1174 1175 // Testers 1176 static bool is_subclass(klassOop klass) { 1177 return Klass::cast(klass)->is_subclass_of(SystemDictionary::CallSite_klass()); 1178 } 1179 static bool is_instance(oop obj) { 1180 return obj != NULL && is_subclass(obj->klass()); 1181 } 1182 1183 // Accessors for code generation: 1184 static int target_offset_in_bytes() { return _target_offset; } 1185 static int caller_method_offset_in_bytes() { return _caller_method_offset; } 1186 static int caller_bci_offset_in_bytes() { return _caller_bci_offset; } 1187 }; 1188 1189 1190 // Interface to java.security.AccessControlContext objects 1191 1192 class java_security_AccessControlContext: AllStatic { 1193 private: 1194 // Note that for this class the layout changed between JDK1.2 and JDK1.3, 1195 // so we compute the offsets at startup rather than hard-wiring them. 1196 static int _context_offset; 1197 static int _privilegedContext_offset; 1198 static int _isPrivileged_offset; 1199 1200 static void compute_offsets(); 1201 public: 1202 static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS); 1203 1204 // Debugging/initialization 1205 friend class JavaClasses; 1206 }; 1207 1208 1209 // Interface to java.lang.ClassLoader objects 1210 1211 class java_lang_ClassLoader : AllStatic { 1212 private: 1213 enum { 1214 hc_parent_offset = 0 1215 }; 1216 1217 static int parent_offset; 1218 1219 public: 1220 static oop parent(oop loader); 1221 1222 static bool is_trusted_loader(oop loader); 1223 1224 // Fix for 4474172 1225 static oop non_reflection_class_loader(oop loader); 1226 1227 // Debugging 1228 friend class JavaClasses; 1229 }; 1230 1231 1232 // Interface to java.lang.System objects 1233 1234 class java_lang_System : AllStatic { 1235 private: 1236 enum { 1237 hc_static_in_offset = 0, 1238 hc_static_out_offset = 1, 1239 hc_static_err_offset = 2 1240 }; 1241 1242 static int static_in_offset; 1243 static int static_out_offset; 1244 static int static_err_offset; 1245 1246 public: 1247 static int in_offset_in_bytes(); 1248 static int out_offset_in_bytes(); 1249 static int err_offset_in_bytes(); 1250 1251 // Debugging 1252 friend class JavaClasses; 1253 }; 1254 1255 1256 // Interface to java.lang.StackTraceElement objects 1257 1258 class java_lang_StackTraceElement: AllStatic { 1259 private: 1260 enum { 1261 hc_declaringClass_offset = 0, 1262 hc_methodName_offset = 1, 1263 hc_fileName_offset = 2, 1264 hc_lineNumber_offset = 3 1265 }; 1266 1267 static int declaringClass_offset; 1268 static int methodName_offset; 1269 static int fileName_offset; 1270 static int lineNumber_offset; 1271 1272 public: 1273 // Setters 1274 static void set_declaringClass(oop element, oop value); 1275 static void set_methodName(oop element, oop value); 1276 static void set_fileName(oop element, oop value); 1277 static void set_lineNumber(oop element, int value); 1278 1279 // Create an instance of StackTraceElement 1280 static oop create(methodHandle m, int bci, TRAPS); 1281 1282 // Debugging 1283 friend class JavaClasses; 1284 }; 1285 1286 1287 // Interface to java.lang.AssertionStatusDirectives objects 1288 1289 class java_lang_AssertionStatusDirectives: AllStatic { 1290 private: 1291 enum { 1292 hc_classes_offset, 1293 hc_classEnabled_offset, 1294 hc_packages_offset, 1295 hc_packageEnabled_offset, 1296 hc_deflt_offset 1297 }; 1298 1299 static int classes_offset; 1300 static int classEnabled_offset; 1301 static int packages_offset; 1302 static int packageEnabled_offset; 1303 static int deflt_offset; 1304 1305 public: 1306 // Setters 1307 static void set_classes(oop obj, oop val); 1308 static void set_classEnabled(oop obj, oop val); 1309 static void set_packages(oop obj, oop val); 1310 static void set_packageEnabled(oop obj, oop val); 1311 static void set_deflt(oop obj, bool val); 1312 // Debugging 1313 friend class JavaClasses; 1314 }; 1315 1316 1317 class java_nio_Buffer: AllStatic { 1318 private: 1319 static int _limit_offset; 1320 1321 public: 1322 static int limit_offset(); 1323 static void compute_offsets(); 1324 }; 1325 1326 class sun_misc_AtomicLongCSImpl: AllStatic { 1327 private: 1328 static int _value_offset; 1329 1330 public: 1331 static int value_offset(); 1332 static void compute_offsets(); 1333 }; 1334 1335 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic { 1336 private: 1337 static int _owner_offset; 1338 public: 1339 static void initialize(TRAPS); 1340 static oop get_owner_threadObj(oop obj); 1341 }; 1342 1343 // Interface to hard-coded offset checking 1344 1345 class JavaClasses : AllStatic { 1346 private: 1347 static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1348 static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1349 static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0; 1350 public: 1351 static void compute_hard_coded_offsets(); 1352 static void compute_offsets(); 1353 static void check_offsets() PRODUCT_RETURN; 1354 }; 1355 1356 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP