1 /*
   2  * Copyright (c) 1997, 2018, 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 hash_offset;
  57   static int coder_offset;
  58 
  59   static bool initialized;
  60 
  61   static Handle basic_create(int length, bool byte_arr, TRAPS);
  62 
  63   static inline void set_coder(oop string, jbyte coder);
  64 
  65  public:
  66 
  67   // Coders
  68   enum Coder {
  69     CODER_LATIN1 =  0,
  70     CODER_UTF16  =  1
  71   };
  72 
  73   static void compute_offsets();
  74   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
  75 
  76   // Instance creation
  77   static Handle create_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 void set_compact_strings(bool value);
  86 
  87   static int value_offset_in_bytes()  {
  88     assert(initialized && (value_offset > 0), "Must be initialized");
  89     return value_offset;
  90   }
  91   static int hash_offset_in_bytes()   {
  92     assert(initialized && (hash_offset > 0), "Must be initialized");
  93     return hash_offset;
  94   }
  95   static int coder_offset_in_bytes()   {
  96     assert(initialized && (coder_offset > 0), "Must be initialized");
  97     return coder_offset;
  98   }
  99 
 100   static inline void set_value_raw(oop string, typeArrayOop buffer);
 101   static inline void set_value(oop string, typeArrayOop buffer);
 102   static inline void set_hash(oop string, unsigned int hash);
 103 
 104   // Accessors
 105   static inline typeArrayOop value(oop java_string);
 106   static inline typeArrayOop value_no_keepalive(oop java_string);
 107   static inline unsigned int hash(oop java_string);
 108   static inline bool is_latin1(oop java_string);
 109   static inline int length(oop java_string);
 110   static int utf8_length(oop java_string);
 111 
 112   // String converters
 113   static char*  as_utf8_string(oop java_string);
 114   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 115   static char*  as_utf8_string(oop java_string, int start, int len);
 116   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 117   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 118   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 119   // produce an ascii string with all other values quoted using \u####
 120   static char*  as_quoted_ascii(oop java_string);
 121 
 122   // Compute the hash value for a java.lang.String object which would
 123   // contain the characters passed in.
 124   //
 125   // As the hash value used by the String object itself, in
 126   // String.hashCode().  This value is normally calculated in Java code
 127   // in the String.hashCode method(), but is precomputed for String
 128   // objects in the shared archive file.
 129   // hash P(31) from Kernighan & Ritchie
 130   //
 131   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 132   static unsigned int hash_code(const jchar* s, int len) {
 133     unsigned int h = 0;
 134     while (len-- > 0) {
 135       h = 31*h + (unsigned int) *s;
 136       s++;
 137     }
 138     return h;
 139   }
 140 
 141   static unsigned int hash_code(const jbyte* s, int len) {
 142     unsigned int h = 0;
 143     while (len-- > 0) {
 144       h = 31*h + (((unsigned int) *s) & 0xFF);
 145       s++;
 146     }
 147     return h;
 148   }
 149 
 150   static unsigned int hash_code(oop java_string);
 151 
 152   static bool equals(oop java_string, jchar* chars, int len);
 153   static bool equals(oop str1, oop str2);
 154 
 155   // Conversion between '.' and '/' formats
 156   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 157   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 158 
 159   // Conversion
 160   static Symbol* as_symbol(oop java_string, TRAPS);
 161   static Symbol* as_symbol_or_null(oop java_string);
 162 
 163   // Testers
 164   static bool is_instance(oop obj);
 165   static inline bool is_instance_inlined(oop obj);
 166 
 167   // Debugging
 168   static void print(oop java_string, outputStream* st);
 169   friend class JavaClasses;
 170   friend class StringTable;
 171 };
 172 
 173 
 174 // Interface to java.lang.Class objects
 175 
 176 #define CLASS_INJECTED_FIELDS(macro)                                       \
 177   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 178   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 179   macro(java_lang_Class, oop_size,               int_signature,     false) \
 180   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 181   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 182   macro(java_lang_Class, signers,                object_signature,  false)
 183 
 184 class java_lang_Class : AllStatic {
 185   friend class VMStructs;
 186   friend class JVMCIVMStructs;
 187 
 188  private:
 189   // The fake offsets are added by the class loader when java.lang.Class is loaded
 190 
 191   static int _klass_offset;
 192   static int _array_klass_offset;
 193 
 194   static int _oop_size_offset;
 195   static int _static_oop_field_count_offset;
 196 
 197   static int _protection_domain_offset;
 198   static int _init_lock_offset;
 199   static int _signers_offset;
 200   static int _class_loader_offset;
 201   static int _module_offset;
 202   static int _component_mirror_offset;
 203 
 204   static bool offsets_computed;
 205   static int classRedefinedCount_offset;
 206 
 207   static GrowableArray<Klass*>* _fixup_mirror_list;
 208   static GrowableArray<Klass*>* _fixup_module_field_list;
 209 
 210   static void set_init_lock(oop java_class, oop init_lock);
 211   static void set_protection_domain(oop java_class, oop protection_domain);
 212   static void set_class_loader(oop java_class, oop class_loader);
 213   static void set_component_mirror(oop java_class, oop comp_mirror);
 214   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
 215   static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);
 216  public:
 217   static void allocate_fixup_lists();
 218   static void compute_offsets();
 219 
 220   // Instance creation
 221   static void create_mirror(Klass* k, Handle class_loader, Handle module,
 222                             Handle protection_domain, TRAPS);
 223   static void fixup_mirror(Klass* k, TRAPS);
 224   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 225 
 226   // Archiving
 227   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 228   static void archive_basic_type_mirrors(TRAPS) NOT_CDS_JAVA_HEAP_RETURN;
 229   static oop  archive_mirror(Klass* k, TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(NULL);
 230   static oop  process_archived_mirror(Klass* k, oop mirror, oop archived_mirror, Thread *THREAD)
 231                                       NOT_CDS_JAVA_HEAP_RETURN_(NULL);
 232   static bool restore_archived_mirror(Klass *k, Handle class_loader, Handle module,
 233                                       Handle protection_domain,
 234                                       TRAPS) NOT_CDS_JAVA_HEAP_RETURN_(false);
 235 
 236   static void fixup_module_field(Klass* k, Handle module);
 237 
 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 Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 243   static void print_signature(oop java_class, outputStream *st);
 244   static const char* as_external_name(oop java_class);
 245   // Testing
 246   static bool is_instance(oop obj);
 247 
 248   static bool is_primitive(oop java_class);
 249   static BasicType primitive_type(oop java_class);
 250   static oop primitive_mirror(BasicType t);
 251   // JVM_NewArray support
 252   static Klass* array_klass_acquire(oop java_class);
 253   static void release_set_array_klass(oop java_class, Klass* klass);
 254   // compiler support for class operations
 255   static int klass_offset_in_bytes()                { return _klass_offset; }
 256   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 257   // Support for classRedefinedCount field
 258   static int classRedefinedCount(oop the_class_mirror);
 259   static void set_classRedefinedCount(oop the_class_mirror, int value);
 260 
 261   // Support for embedded per-class oops
 262   static oop  protection_domain(oop java_class);
 263   static oop  init_lock(oop java_class);
 264   static oop  component_mirror(oop java_class);
 265   static objArrayOop  signers(oop java_class);
 266   static void set_signers(oop java_class, objArrayOop signers);
 267 
 268   static oop class_loader(oop java_class);
 269   static void set_module(oop java_class, oop module);
 270   static oop module(oop java_class);
 271 
 272   static int oop_size(oop java_class);
 273   static void set_oop_size(HeapWord* java_class, int size);
 274   static int static_oop_field_count(oop java_class);
 275   static void set_static_oop_field_count(oop java_class, int size);
 276 
 277   static GrowableArray<Klass*>* fixup_mirror_list() {
 278     return _fixup_mirror_list;
 279   }
 280   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 281     _fixup_mirror_list = v;
 282   }
 283 
 284   static GrowableArray<Klass*>* fixup_module_field_list() {
 285     return _fixup_module_field_list;
 286   }
 287   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 288     _fixup_module_field_list = v;
 289   }
 290 
 291   // Debugging
 292   friend class JavaClasses;
 293   friend class InstanceKlass;   // verification code accesses offsets
 294   friend class ClassFileParser; // access to number_of_fake_fields
 295 };
 296 
 297 // Interface to java.lang.Thread objects
 298 
 299 class java_lang_Thread : AllStatic {
 300  private:
 301   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 302   // so we compute the offsets at startup rather than hard-wiring them.
 303   static int _name_offset;
 304   static int _group_offset;
 305   static int _contextClassLoader_offset;
 306   static int _inheritedAccessControlContext_offset;
 307   static int _priority_offset;
 308   static int _eetop_offset;
 309   static int _daemon_offset;
 310   static int _stillborn_offset;
 311   static int _stackSize_offset;
 312   static int _tid_offset;
 313   static int _thread_status_offset;
 314   static int _park_blocker_offset;
 315   static int _park_event_offset ;
 316 
 317   static void compute_offsets();
 318 
 319  public:
 320   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 321 
 322   // Instance creation
 323   static oop create();
 324   // Returns the JavaThread associated with the thread obj
 325   static JavaThread* thread(oop java_thread);
 326   // Set JavaThread for instance
 327   static void set_thread(oop java_thread, JavaThread* thread);
 328   // Name
 329   static oop name(oop java_thread);
 330   static void set_name(oop java_thread, oop name);
 331   // Priority
 332   static ThreadPriority priority(oop java_thread);
 333   static void set_priority(oop java_thread, ThreadPriority priority);
 334   // Thread group
 335   static oop  threadGroup(oop java_thread);
 336   // Stillborn
 337   static bool is_stillborn(oop java_thread);
 338   static void set_stillborn(oop java_thread);
 339   // Alive (NOTE: this is not really a field, but provides the correct
 340   // definition without doing a Java call)
 341   static bool is_alive(oop java_thread);
 342   // Daemon
 343   static bool is_daemon(oop java_thread);
 344   static void set_daemon(oop java_thread);
 345   // Context ClassLoader
 346   static oop context_class_loader(oop java_thread);
 347   // Control context
 348   static oop inherited_access_control_context(oop java_thread);
 349   // Stack size hint
 350   static jlong stackSize(oop java_thread);
 351   // Thread ID
 352   static jlong thread_id(oop java_thread);
 353 
 354   // Blocker object responsible for thread parking
 355   static oop park_blocker(oop java_thread);
 356 
 357   // Pointer to type-stable park handler, encoded as jlong.
 358   // Should be set when apparently null
 359   // For details, see unsafe.cpp Unsafe_Unpark
 360   static jlong park_event(oop java_thread);
 361   static bool set_park_event(oop java_thread, jlong ptr);
 362 
 363   // Java Thread Status for JVMTI and M&M use.
 364   // This thread status info is saved in threadStatus field of
 365   // java.lang.Thread java class.
 366   enum ThreadStatus {
 367     NEW                      = 0,
 368     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 369                                JVMTI_THREAD_STATE_RUNNABLE,
 370     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 371                                JVMTI_THREAD_STATE_WAITING +
 372                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 373                                JVMTI_THREAD_STATE_SLEEPING,
 374     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 375                                JVMTI_THREAD_STATE_WAITING +
 376                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 377                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 378     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 379                                JVMTI_THREAD_STATE_WAITING +
 380                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 381                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 382     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 383                                JVMTI_THREAD_STATE_WAITING +
 384                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 385                                JVMTI_THREAD_STATE_PARKED,
 386     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 387                                JVMTI_THREAD_STATE_WAITING +
 388                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 389                                JVMTI_THREAD_STATE_PARKED,
 390     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 391                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 392     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 393   };
 394   // Write thread status info to threadStatus field of java.lang.Thread.
 395   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 396   // Read thread status info from threadStatus field of java.lang.Thread.
 397   static ThreadStatus get_thread_status(oop java_thread_oop);
 398 
 399   static const char*  thread_status_name(oop java_thread_oop);
 400 
 401   // Debugging
 402   friend class JavaClasses;
 403 };
 404 
 405 // Interface to java.lang.ThreadGroup objects
 406 
 407 class java_lang_ThreadGroup : AllStatic {
 408  private:
 409   static int _parent_offset;
 410   static int _name_offset;
 411   static int _threads_offset;
 412   static int _groups_offset;
 413   static int _maxPriority_offset;
 414   static int _destroyed_offset;
 415   static int _daemon_offset;
 416   static int _nthreads_offset;
 417   static int _ngroups_offset;
 418 
 419   static void compute_offsets();
 420 
 421  public:
 422   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 423 
 424   // parent ThreadGroup
 425   static oop  parent(oop java_thread_group);
 426   // name
 427   static const char* name(oop java_thread_group);
 428   // ("name as oop" accessor is not necessary)
 429   // Number of threads in group
 430   static int nthreads(oop java_thread_group);
 431   // threads
 432   static objArrayOop threads(oop java_thread_group);
 433   // Number of threads in group
 434   static int ngroups(oop java_thread_group);
 435   // groups
 436   static objArrayOop groups(oop java_thread_group);
 437   // maxPriority in group
 438   static ThreadPriority maxPriority(oop java_thread_group);
 439   // Destroyed
 440   static bool is_destroyed(oop java_thread_group);
 441   // Daemon
 442   static bool is_daemon(oop java_thread_group);
 443   // Debugging
 444   friend class JavaClasses;
 445 };
 446 
 447 
 448 
 449 // Interface to java.lang.Throwable objects
 450 
 451 class java_lang_Throwable: AllStatic {
 452   friend class BacktraceBuilder;
 453   friend class BacktraceIterator;
 454 
 455  private:
 456   // Offsets
 457   enum {
 458     hc_backtrace_offset     =  0,
 459     hc_detailMessage_offset =  1,
 460     hc_cause_offset         =  2,  // New since 1.4
 461     hc_stackTrace_offset    =  3   // New since 1.4
 462   };
 463   // Trace constants
 464   enum {
 465     trace_methods_offset = 0,
 466     trace_bcis_offset    = 1,
 467     trace_mirrors_offset = 2,
 468     trace_names_offset   = 3,
 469     trace_next_offset    = 4,
 470     trace_size           = 5,
 471     trace_chunk_size     = 32
 472   };
 473 
 474   static int backtrace_offset;
 475   static int detailMessage_offset;
 476   static int stackTrace_offset;
 477   static int depth_offset;
 478   static int static_unassigned_stacktrace_offset;
 479 
 480   // StackTrace (programmatic access, new since 1.4)
 481   static void clear_stacktrace(oop throwable);
 482   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 483   static void set_stacktrace(oop throwable, oop st_element_array);
 484   static oop unassigned_stacktrace();
 485 
 486  public:
 487   // Backtrace
 488   static oop backtrace(oop throwable);
 489   static void set_backtrace(oop throwable, oop value);
 490   static int depth(oop throwable);
 491   static void set_depth(oop throwable, int value);
 492   // Needed by JVMTI to filter out this internal field.
 493   static int get_backtrace_offset() { return backtrace_offset;}
 494   static int get_detailMessage_offset() { return detailMessage_offset;}
 495   // Message
 496   static oop message(oop throwable);
 497   static void set_message(oop throwable, oop value);
 498   static Symbol* detail_message(oop throwable);
 499   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
 500   static void print_stack_usage(Handle stream);
 501 
 502   static void compute_offsets();
 503   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 504 
 505   // Allocate space for backtrace (created but stack trace not filled in)
 506   static void allocate_backtrace(Handle throwable, TRAPS);
 507   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 508   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 509   // Fill in current stack trace, can cause GC
 510   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 511   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 512   // Programmatic access to stack trace
 513   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
 514   // Printing
 515   static void print(oop throwable, outputStream* st);
 516   static void print_stack_trace(Handle throwable, outputStream* st);
 517   static void java_printStackTrace(Handle throwable, TRAPS);
 518   // Debugging
 519   friend class JavaClasses;
 520 };
 521 
 522 
 523 // Interface to java.lang.reflect.AccessibleObject objects
 524 
 525 class java_lang_reflect_AccessibleObject: AllStatic {
 526  private:
 527   // Note that to reduce dependencies on the JDK we compute these
 528   // offsets at run-time.
 529   static int override_offset;
 530 
 531   static void compute_offsets();
 532 
 533  public:
 534   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 535 
 536   // Accessors
 537   static jboolean override(oop reflect);
 538   static void set_override(oop reflect, jboolean value);
 539 
 540   // Debugging
 541   friend class JavaClasses;
 542 };
 543 
 544 
 545 // Interface to java.lang.reflect.Method objects
 546 
 547 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 548  private:
 549   // Note that to reduce dependencies on the JDK we compute these
 550   // offsets at run-time.
 551   static int clazz_offset;
 552   static int name_offset;
 553   static int returnType_offset;
 554   static int parameterTypes_offset;
 555   static int exceptionTypes_offset;
 556   static int slot_offset;
 557   static int modifiers_offset;
 558   static int signature_offset;
 559   static int annotations_offset;
 560   static int parameter_annotations_offset;
 561   static int annotation_default_offset;
 562   static int type_annotations_offset;
 563 
 564   static void compute_offsets();
 565 
 566  public:
 567   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 568 
 569   // Allocation
 570   static Handle create(TRAPS);
 571 
 572   // Accessors
 573   static oop clazz(oop reflect);
 574   static void set_clazz(oop reflect, oop value);
 575 
 576   static oop name(oop method);
 577   static void set_name(oop method, oop value);
 578 
 579   static oop return_type(oop method);
 580   static void set_return_type(oop method, oop value);
 581 
 582   static oop parameter_types(oop method);
 583   static void set_parameter_types(oop method, oop value);
 584 
 585   static oop exception_types(oop method);
 586   static void set_exception_types(oop method, oop value);
 587 
 588   static int slot(oop reflect);
 589   static void set_slot(oop reflect, int value);
 590 
 591   static int modifiers(oop method);
 592   static void set_modifiers(oop method, int value);
 593 
 594   static bool has_signature_field();
 595   static oop signature(oop method);
 596   static void set_signature(oop method, oop value);
 597 
 598   static bool has_annotations_field();
 599   static oop annotations(oop method);
 600   static void set_annotations(oop method, oop value);
 601 
 602   static bool has_parameter_annotations_field();
 603   static oop parameter_annotations(oop method);
 604   static void set_parameter_annotations(oop method, oop value);
 605 
 606   static bool has_annotation_default_field();
 607   static oop annotation_default(oop method);
 608   static void set_annotation_default(oop method, oop value);
 609 
 610   static bool has_type_annotations_field();
 611   static oop type_annotations(oop method);
 612   static void set_type_annotations(oop method, oop value);
 613 
 614   // Debugging
 615   friend class JavaClasses;
 616 };
 617 
 618 
 619 // Interface to java.lang.reflect.Constructor objects
 620 
 621 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 622  private:
 623   // Note that to reduce dependencies on the JDK we compute these
 624   // offsets at run-time.
 625   static int clazz_offset;
 626   static int parameterTypes_offset;
 627   static int exceptionTypes_offset;
 628   static int slot_offset;
 629   static int modifiers_offset;
 630   static int signature_offset;
 631   static int annotations_offset;
 632   static int parameter_annotations_offset;
 633   static int type_annotations_offset;
 634 
 635   static void compute_offsets();
 636 
 637  public:
 638   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 639 
 640   // Allocation
 641   static Handle create(TRAPS);
 642 
 643   // Accessors
 644   static oop clazz(oop reflect);
 645   static void set_clazz(oop reflect, oop value);
 646 
 647   static oop parameter_types(oop constructor);
 648   static void set_parameter_types(oop constructor, oop value);
 649 
 650   static oop exception_types(oop constructor);
 651   static void set_exception_types(oop constructor, oop value);
 652 
 653   static int slot(oop reflect);
 654   static void set_slot(oop reflect, int value);
 655 
 656   static int modifiers(oop constructor);
 657   static void set_modifiers(oop constructor, int value);
 658 
 659   static bool has_signature_field();
 660   static oop signature(oop constructor);
 661   static void set_signature(oop constructor, oop value);
 662 
 663   static bool has_annotations_field();
 664   static oop annotations(oop constructor);
 665   static void set_annotations(oop constructor, oop value);
 666 
 667   static bool has_parameter_annotations_field();
 668   static oop parameter_annotations(oop method);
 669   static void set_parameter_annotations(oop method, oop value);
 670 
 671   static bool has_type_annotations_field();
 672   static oop type_annotations(oop constructor);
 673   static void set_type_annotations(oop constructor, oop value);
 674 
 675   // Debugging
 676   friend class JavaClasses;
 677 };
 678 
 679 
 680 // Interface to java.lang.reflect.Field objects
 681 
 682 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 683  private:
 684   // Note that to reduce dependencies on the JDK we compute these
 685   // offsets at run-time.
 686   static int clazz_offset;
 687   static int name_offset;
 688   static int type_offset;
 689   static int slot_offset;
 690   static int modifiers_offset;
 691   static int signature_offset;
 692   static int annotations_offset;
 693   static int type_annotations_offset;
 694 
 695   static void compute_offsets();
 696 
 697  public:
 698   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 699 
 700   // Allocation
 701   static Handle create(TRAPS);
 702 
 703   // Accessors
 704   static oop clazz(oop reflect);
 705   static void set_clazz(oop reflect, oop value);
 706 
 707   static oop name(oop field);
 708   static void set_name(oop field, oop value);
 709 
 710   static oop type(oop field);
 711   static void set_type(oop field, oop value);
 712 
 713   static int slot(oop reflect);
 714   static void set_slot(oop reflect, int value);
 715 
 716   static int modifiers(oop field);
 717   static void set_modifiers(oop field, int value);
 718 
 719   static bool has_signature_field();
 720   static oop signature(oop constructor);
 721   static void set_signature(oop constructor, oop value);
 722 
 723   static bool has_annotations_field();
 724   static oop annotations(oop constructor);
 725   static void set_annotations(oop constructor, oop value);
 726 
 727   static bool has_parameter_annotations_field();
 728   static oop parameter_annotations(oop method);
 729   static void set_parameter_annotations(oop method, oop value);
 730 
 731   static bool has_annotation_default_field();
 732   static oop annotation_default(oop method);
 733   static void set_annotation_default(oop method, oop value);
 734 
 735   static bool has_type_annotations_field();
 736   static oop type_annotations(oop field);
 737   static void set_type_annotations(oop field, oop value);
 738 
 739   // Debugging
 740   friend class JavaClasses;
 741 };
 742 
 743 class java_lang_reflect_Parameter {
 744  private:
 745   // Note that to reduce dependencies on the JDK we compute these
 746   // offsets at run-time.
 747   static int name_offset;
 748   static int modifiers_offset;
 749   static int index_offset;
 750   static int executable_offset;
 751 
 752   static void compute_offsets();
 753 
 754  public:
 755   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 756 
 757   // Allocation
 758   static Handle create(TRAPS);
 759 
 760   // Accessors
 761   static oop name(oop field);
 762   static void set_name(oop field, oop value);
 763 
 764   static int index(oop reflect);
 765   static void set_index(oop reflect, int value);
 766 
 767   static int modifiers(oop reflect);
 768   static void set_modifiers(oop reflect, int value);
 769 
 770   static oop executable(oop constructor);
 771   static void set_executable(oop constructor, oop value);
 772 
 773   friend class JavaClasses;
 774 };
 775 
 776 #define MODULE_INJECTED_FIELDS(macro)                            \
 777   macro(java_lang_Module, module_entry, intptr_signature, false)
 778 
 779 class java_lang_Module {
 780   private:
 781     static int loader_offset;
 782     static int name_offset;
 783     static int _module_entry_offset;
 784     static void compute_offsets();
 785 
 786   public:
 787     static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 788 
 789     // Allocation
 790     static Handle create(Handle loader, Handle module_name, TRAPS);
 791 
 792     // Testers
 793     static bool is_instance(oop obj);
 794 
 795     // Accessors
 796     static oop loader(oop module);
 797     static void set_loader(oop module, oop value);
 798 
 799     static oop name(oop module);
 800     static void set_name(oop module, oop value);
 801 
 802     static ModuleEntry* module_entry(oop module);
 803     static void set_module_entry(oop module, ModuleEntry* module_entry);
 804 
 805   friend class JavaClasses;
 806 };
 807 
 808 // Interface to jdk.internal.reflect.ConstantPool objects
 809 class reflect_ConstantPool {
 810  private:
 811   // Note that to reduce dependencies on the JDK we compute these
 812   // offsets at run-time.
 813   static int _oop_offset;
 814 
 815   static void compute_offsets();
 816 
 817  public:
 818   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 819 
 820   // Allocation
 821   static Handle create(TRAPS);
 822 
 823   // Accessors
 824   static void set_cp(oop reflect, ConstantPool* value);
 825   static int oop_offset() {
 826     return _oop_offset;
 827   }
 828 
 829   static ConstantPool* get_cp(oop reflect);
 830 
 831   // Debugging
 832   friend class JavaClasses;
 833 };
 834 
 835 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
 836 class reflect_UnsafeStaticFieldAccessorImpl {
 837  private:
 838   static int _base_offset;
 839   static void compute_offsets();
 840 
 841  public:
 842   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 843 
 844   static int base_offset() {
 845     return _base_offset;
 846   }
 847 
 848   // Debugging
 849   friend class JavaClasses;
 850 };
 851 
 852 // Interface to java.lang primitive type boxing objects:
 853 //  - java.lang.Boolean
 854 //  - java.lang.Character
 855 //  - java.lang.Float
 856 //  - java.lang.Double
 857 //  - java.lang.Byte
 858 //  - java.lang.Short
 859 //  - java.lang.Integer
 860 //  - java.lang.Long
 861 
 862 // This could be separated out into 8 individual classes.
 863 
 864 class java_lang_boxing_object: AllStatic {
 865  private:
 866   enum {
 867    hc_value_offset = 0
 868   };
 869   static int value_offset;
 870   static int long_value_offset;
 871 
 872   static oop initialize_and_allocate(BasicType type, TRAPS);
 873  public:
 874   // Allocation. Returns a boxed value, or NULL for invalid type.
 875   static oop create(BasicType type, jvalue* value, TRAPS);
 876   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 877   static BasicType get_value(oop box, jvalue* value);
 878   static BasicType set_value(oop box, jvalue* value);
 879   static BasicType basic_type(oop box);
 880   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 881   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 882   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 883   static void print(BasicType type, jvalue* value, outputStream* st);
 884 
 885   static int value_offset_in_bytes(BasicType type) {
 886     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 887                                                     value_offset;
 888   }
 889 
 890   // Debugging
 891   friend class JavaClasses;
 892 };
 893 
 894 
 895 
 896 // Interface to java.lang.ref.Reference objects
 897 
 898 class java_lang_ref_Reference: AllStatic {
 899  public:
 900   enum {
 901    hc_referent_offset   = 0,
 902    hc_queue_offset      = 1,
 903    hc_next_offset       = 2,
 904    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 905   };
 906 
 907   static int referent_offset;
 908   static int queue_offset;
 909   static int next_offset;
 910   static int discovered_offset;
 911 
 912   // Accessors
 913   static inline oop referent(oop ref);
 914   static inline void set_referent(oop ref, oop value);
 915   static inline void set_referent_raw(oop ref, oop value);
 916   static inline HeapWord* referent_addr_raw(oop ref);
 917   static inline oop next(oop ref);
 918   static inline void set_next(oop ref, oop value);
 919   static inline void set_next_raw(oop ref, oop value);
 920   static inline HeapWord* next_addr_raw(oop ref);
 921   static inline oop discovered(oop ref);
 922   static inline void set_discovered(oop ref, oop value);
 923   static inline void set_discovered_raw(oop ref, oop value);
 924   static inline HeapWord* discovered_addr_raw(oop ref);
 925   static inline oop queue(oop ref);
 926   static inline void set_queue(oop ref, oop value);
 927   static bool is_referent_field(oop obj, ptrdiff_t offset);
 928   static inline bool is_phantom(oop ref);
 929 };
 930 
 931 
 932 // Interface to java.lang.ref.SoftReference objects
 933 
 934 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 935  public:
 936   static int timestamp_offset;
 937   static int static_clock_offset;
 938 
 939   // Accessors
 940   static jlong timestamp(oop ref);
 941 
 942   // Accessors for statics
 943   static jlong clock();
 944   static void set_clock(jlong value);
 945 
 946   static void compute_offsets();
 947   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 948 };
 949 
 950 // Interface to java.lang.invoke.MethodHandle objects
 951 
 952 class MethodHandleEntry;
 953 
 954 class java_lang_invoke_MethodHandle: AllStatic {
 955   friend class JavaClasses;
 956 
 957  private:
 958   static int _type_offset;               // the MethodType of this MH
 959   static int _form_offset;               // the LambdaForm of this MH
 960 
 961   static void compute_offsets();
 962 
 963  public:
 964   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 965 
 966   // Accessors
 967   static oop            type(oop mh);
 968   static void       set_type(oop mh, oop mtype);
 969 
 970   static oop            form(oop mh);
 971   static void       set_form(oop mh, oop lform);
 972 
 973   // Testers
 974   static bool is_subclass(Klass* klass) {
 975     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 976   }
 977   static bool is_instance(oop obj);
 978 
 979   // Accessors for code generation:
 980   static int type_offset_in_bytes()             { return _type_offset; }
 981   static int form_offset_in_bytes()             { return _form_offset; }
 982 };
 983 
 984 // Interface to java.lang.invoke.DirectMethodHandle objects
 985 
 986 class java_lang_invoke_DirectMethodHandle: AllStatic {
 987   friend class JavaClasses;
 988 
 989  private:
 990   static int _member_offset;               // the MemberName of this DMH
 991 
 992   static void compute_offsets();
 993 
 994  public:
 995   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
 996 
 997   // Accessors
 998   static oop  member(oop mh);
 999 
1000   // Testers
1001   static bool is_subclass(Klass* klass) {
1002     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1003   }
1004   static bool is_instance(oop obj);
1005 
1006   // Accessors for code generation:
1007   static int member_offset_in_bytes()           { return _member_offset; }
1008 };
1009 
1010 // Interface to java.lang.invoke.LambdaForm objects
1011 // (These are a private interface for managing adapter code generation.)
1012 
1013 class java_lang_invoke_LambdaForm: AllStatic {
1014   friend class JavaClasses;
1015 
1016  private:
1017   static int _vmentry_offset;  // type is MemberName
1018 
1019   static void compute_offsets();
1020 
1021  public:
1022   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1023 
1024   // Accessors
1025   static oop            vmentry(oop lform);
1026   static void       set_vmentry(oop lform, oop invoker);
1027 
1028   // Testers
1029   static bool is_subclass(Klass* klass) {
1030     return SystemDictionary::LambdaForm_klass() != NULL &&
1031       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1032   }
1033   static bool is_instance(oop obj);
1034 
1035   // Accessors for code generation:
1036   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1037 };
1038 
1039 
1040 // Interface to java.lang.invoke.MemberName objects
1041 // (These are a private interface for Java code to query the class hierarchy.)
1042 
1043 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \
1044   macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \
1045   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)
1046 
1047 class java_lang_invoke_ResolvedMethodName : AllStatic {
1048   friend class JavaClasses;
1049 
1050   static int _vmtarget_offset;
1051   static int _vmholder_offset;
1052 
1053   static void compute_offsets();
1054  public:
1055   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1056 
1057   static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }
1058 
1059   static Method* vmtarget(oop resolved_method);
1060   static void set_vmtarget(oop resolved_method, Method* method);
1061 
1062   // find or create resolved member name
1063   static oop find_resolved_method(const methodHandle& m, TRAPS);
1064 
1065   static bool is_instance(oop resolved_method);
1066 };
1067 
1068 
1069 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1070   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)
1071 
1072 
1073 class java_lang_invoke_MemberName: AllStatic {
1074   friend class JavaClasses;
1075 
1076  private:
1077   // From java.lang.invoke.MemberName:
1078   //    private Class<?>   clazz;       // class in which the method is defined
1079   //    private String     name;        // may be null if not yet materialized
1080   //    private Object     type;        // may be null if not yet materialized
1081   //    private int        flags;       // modifier bits; see reflect.Modifier
1082   //    private ResolvedMethodName method;    // holds VM-specific target value
1083   //    private intptr_t   vmindex;     // member index within class or interface
1084   static int _clazz_offset;
1085   static int _name_offset;
1086   static int _type_offset;
1087   static int _flags_offset;
1088   static int _method_offset;
1089   static int _vmindex_offset;
1090 
1091   static void compute_offsets();
1092 
1093  public:
1094   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1095   // Accessors
1096   static oop            clazz(oop mname);
1097   static void       set_clazz(oop mname, oop clazz);
1098 
1099   static oop            type(oop mname);
1100   static void       set_type(oop mname, oop type);
1101 
1102   static oop            name(oop mname);
1103   static void       set_name(oop mname, oop name);
1104 
1105   static int            flags(oop mname);
1106   static void       set_flags(oop mname, int flags);
1107 
1108   // Link through ResolvedMethodName field to get Method*
1109   static Method*        vmtarget(oop mname);
1110   static void       set_method(oop mname, oop method);
1111 
1112   static intptr_t       vmindex(oop mname);
1113   static void       set_vmindex(oop mname, intptr_t index);
1114 
1115   // Testers
1116   static bool is_subclass(Klass* klass) {
1117     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1118   }
1119   static bool is_instance(oop obj);
1120 
1121   static bool is_method(oop obj);
1122 
1123   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1124   enum {
1125     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1126     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1127     MN_IS_FIELD             = 0x00040000, // field
1128     MN_IS_TYPE              = 0x00080000, // nested type
1129     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1130     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1131     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1132     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1133     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1134     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1135   };
1136 
1137   // Accessors for code generation:
1138   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1139   static int type_offset_in_bytes()             { return _type_offset; }
1140   static int name_offset_in_bytes()             { return _name_offset; }
1141   static int flags_offset_in_bytes()            { return _flags_offset; }
1142   static int method_offset_in_bytes()           { return _method_offset; }
1143   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1144 };
1145 
1146 
1147 // Interface to java.lang.invoke.MethodType objects
1148 
1149 class java_lang_invoke_MethodType: AllStatic {
1150   friend class JavaClasses;
1151 
1152  private:
1153   static int _rtype_offset;
1154   static int _ptypes_offset;
1155 
1156   static void compute_offsets();
1157 
1158  public:
1159   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1160   // Accessors
1161   static oop            rtype(oop mt);
1162   static objArrayOop    ptypes(oop mt);
1163 
1164   static oop            ptype(oop mt, int index);
1165   static int            ptype_count(oop mt);
1166 
1167   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1168   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1169 
1170   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1171   static void           print_signature(oop mt, outputStream* st);
1172 
1173   static bool is_instance(oop obj);
1174 
1175   static bool equals(oop mt1, oop mt2);
1176 
1177   // Accessors for code generation:
1178   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1179   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1180 };
1181 
1182 
1183 // Interface to java.lang.invoke.CallSite objects
1184 
1185 class java_lang_invoke_CallSite: AllStatic {
1186   friend class JavaClasses;
1187 
1188 private:
1189   static int _target_offset;
1190   static int _context_offset;
1191 
1192   static void compute_offsets();
1193 
1194 public:
1195   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1196   // Accessors
1197   static oop              target(          oop site);
1198   static void         set_target(          oop site, oop target);
1199   static void         set_target_volatile( oop site, oop target);
1200 
1201   static oop              context(oop site);
1202 
1203   // Testers
1204   static bool is_subclass(Klass* klass) {
1205     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1206   }
1207   static bool is_instance(oop obj);
1208 
1209   // Accessors for code generation:
1210   static int target_offset_in_bytes()           { return _target_offset; }
1211 };
1212 
1213 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1214 
1215 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1216   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1217 
1218 class DependencyContext;
1219 
1220 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1221   friend class JavaClasses;
1222 
1223 private:
1224   static int _vmdependencies_offset;
1225 
1226   static void compute_offsets();
1227 
1228 public:
1229   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1230   // Accessors
1231   static DependencyContext vmdependencies(oop context);
1232 
1233   // Testers
1234   static bool is_subclass(Klass* klass) {
1235     return klass->is_subclass_of(SystemDictionary::Context_klass());
1236   }
1237   static bool is_instance(oop obj);
1238 };
1239 
1240 // Interface to java.security.AccessControlContext objects
1241 
1242 class java_security_AccessControlContext: AllStatic {
1243  private:
1244   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1245   // so we compute the offsets at startup rather than hard-wiring them.
1246   static int _context_offset;
1247   static int _privilegedContext_offset;
1248   static int _isPrivileged_offset;
1249   static int _isAuthorized_offset;
1250 
1251   static void compute_offsets();
1252  public:
1253   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1254   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1255 
1256   static bool is_authorized(Handle context);
1257 
1258   // Debugging/initialization
1259   friend class JavaClasses;
1260 };
1261 
1262 
1263 // Interface to java.lang.ClassLoader objects
1264 
1265 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1266   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1267 
1268 class java_lang_ClassLoader : AllStatic {
1269  private:
1270   static int _loader_data_offset;
1271   static bool offsets_computed;
1272   static int parent_offset;
1273   static int parallelCapable_offset;
1274   static int name_offset;
1275   static int nameAndId_offset;
1276   static int unnamedModule_offset;
1277 
1278  public:
1279   static void compute_offsets();
1280   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1281 
1282   static ClassLoaderData* loader_data(oop loader);
1283   static ClassLoaderData* cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data);
1284 
1285   static oop parent(oop loader);
1286   static oop name(oop loader);
1287   static oop nameAndId(oop loader);
1288   static bool isAncestor(oop loader, oop cl);
1289 
1290   // Support for parallelCapable field
1291   static bool parallelCapable(oop the_class_mirror);
1292 
1293   static bool is_trusted_loader(oop loader);
1294 
1295   // Return true if this is one of the class loaders associated with
1296   // the generated bytecodes for reflection.
1297   static bool is_reflection_class_loader(oop loader);
1298 
1299   // Fix for 4474172
1300   static oop  non_reflection_class_loader(oop loader);
1301 
1302   // Testers
1303   static bool is_subclass(Klass* klass) {
1304     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1305   }
1306   static bool is_instance(oop obj);
1307 
1308   static oop unnamedModule(oop loader);
1309 
1310   // Debugging
1311   friend class JavaClasses;
1312   friend class ClassFileParser; // access to number_of_fake_fields
1313 
1314   // Describe ClassLoader for exceptions, tracing ...
1315   // Prints "<name>" (instance of <classname>, child of "<name>" <classname>).
1316   // If a classloader has no name, it prints <unnamed> instead. The output
1317   // for well known loaders (system/platform) is abbreviated.
1318   static const char* describe_external(const oop loader);
1319 };
1320 
1321 
1322 // Interface to java.lang.System objects
1323 
1324 class java_lang_System : AllStatic {
1325  private:
1326   static int  static_in_offset;
1327   static int static_out_offset;
1328   static int static_err_offset;
1329   static int static_security_offset;
1330 
1331  public:
1332   static int  in_offset_in_bytes();
1333   static int out_offset_in_bytes();
1334   static int err_offset_in_bytes();
1335 
1336   static bool has_security_manager();
1337 
1338   static void compute_offsets();
1339   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1340 
1341   // Debugging
1342   friend class JavaClasses;
1343 };
1344 
1345 
1346 // Interface to java.lang.StackTraceElement objects
1347 
1348 class java_lang_StackTraceElement: AllStatic {
1349  private:
1350   static int declaringClassObject_offset;
1351   static int classLoaderName_offset;
1352   static int moduleName_offset;
1353   static int moduleVersion_offset;
1354   static int declaringClass_offset;
1355   static int methodName_offset;
1356   static int fileName_offset;
1357   static int lineNumber_offset;
1358 
1359   // Setters
1360   static void set_classLoaderName(oop element, oop value);
1361   static void set_moduleName(oop element, oop value);
1362   static void set_moduleVersion(oop element, oop value);
1363   static void set_declaringClass(oop element, oop value);
1364   static void set_methodName(oop element, oop value);
1365   static void set_fileName(oop element, oop value);
1366   static void set_lineNumber(oop element, int value);
1367   static void set_declaringClassObject(oop element, oop value);
1368 
1369  public:
1370   // Create an instance of StackTraceElement
1371   static oop create(const methodHandle& method, int bci, TRAPS);
1372 
1373   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1374                       int version, int bci, Symbol* name, TRAPS);
1375 
1376   static void compute_offsets();
1377   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1378 
1379   // Debugging
1380   friend class JavaClasses;
1381 };
1382 
1383 
1384 class Backtrace: AllStatic {
1385  public:
1386   // Helper backtrace functions to store bci|version together.
1387   static int merge_bci_and_version(int bci, int version);
1388   static int merge_mid_and_cpref(int mid, int cpref);
1389   static int bci_at(unsigned int merged);
1390   static int version_at(unsigned int merged);
1391   static int mid_at(unsigned int merged);
1392   static int cpref_at(unsigned int merged);
1393   static int get_line_number(const methodHandle& method, int bci);
1394   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1395 
1396   // Debugging
1397   friend class JavaClasses;
1398 };
1399 
1400 // Interface to java.lang.StackFrameInfo objects
1401 
1402 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1403   macro(java_lang_StackFrameInfo, version, short_signature, false)
1404 
1405 class java_lang_StackFrameInfo: AllStatic {
1406 private:
1407   static int _memberName_offset;
1408   static int _bci_offset;
1409   static int _version_offset;
1410 
1411   static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1412 
1413 public:
1414   // Setters
1415   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS);
1416   static void set_bci(oop info, int value);
1417 
1418   static void set_version(oop info, short value);
1419 
1420   static void compute_offsets();
1421   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1422 
1423   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1424 
1425   // Debugging
1426   friend class JavaClasses;
1427 };
1428 
1429 class java_lang_LiveStackFrameInfo: AllStatic {
1430  private:
1431   static int _monitors_offset;
1432   static int _locals_offset;
1433   static int _operands_offset;
1434   static int _mode_offset;
1435 
1436  public:
1437   static void set_monitors(oop info, oop value);
1438   static void set_locals(oop info, oop value);
1439   static void set_operands(oop info, oop value);
1440   static void set_mode(oop info, int value);
1441 
1442   static void compute_offsets();
1443   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1444 
1445   // Debugging
1446   friend class JavaClasses;
1447 };
1448 
1449 // Interface to java.lang.AssertionStatusDirectives objects
1450 
1451 class java_lang_AssertionStatusDirectives: AllStatic {
1452  private:
1453   static int classes_offset;
1454   static int classEnabled_offset;
1455   static int packages_offset;
1456   static int packageEnabled_offset;
1457   static int deflt_offset;
1458 
1459  public:
1460   // Setters
1461   static void set_classes(oop obj, oop val);
1462   static void set_classEnabled(oop obj, oop val);
1463   static void set_packages(oop obj, oop val);
1464   static void set_packageEnabled(oop obj, oop val);
1465   static void set_deflt(oop obj, bool val);
1466 
1467   static void compute_offsets();
1468   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1469 
1470   // Debugging
1471   friend class JavaClasses;
1472 };
1473 
1474 
1475 class java_nio_Buffer: AllStatic {
1476  private:
1477   static int _limit_offset;
1478 
1479  public:
1480   static int  limit_offset();
1481   static void compute_offsets();
1482   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1483 };
1484 
1485 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1486  private:
1487   static int  _owner_offset;
1488  public:
1489   static void compute_offsets();
1490   static oop  get_owner_threadObj(oop obj);
1491   static void serialize(SerializeClosure* f) NOT_CDS_RETURN;
1492 };
1493 
1494 // Use to declare fields that need to be injected into Java classes
1495 // for the JVM to use.  The name_index and signature_index are
1496 // declared in vmSymbols.  The may_be_java flag is used to declare
1497 // fields that might already exist in Java but should be injected if
1498 // they don't.  Otherwise the field is unconditionally injected and
1499 // the JVM uses the injected one.  This is to ensure that name
1500 // collisions don't occur.  In general may_be_java should be false
1501 // unless there's a good reason.
1502 
1503 class InjectedField {
1504  public:
1505   const SystemDictionary::WKID klass_id;
1506   const vmSymbols::SID name_index;
1507   const vmSymbols::SID signature_index;
1508   const bool           may_be_java;
1509 
1510 
1511   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1512   Symbol* name() const      { return lookup_symbol(name_index); }
1513   Symbol* signature() const { return lookup_symbol(signature_index); }
1514 
1515   int compute_offset();
1516 
1517   // Find the Symbol for this index
1518   static Symbol* lookup_symbol(int symbol_index) {
1519     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1520   }
1521 };
1522 
1523 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1524   klass##_##name##_enum,
1525 
1526 #define ALL_INJECTED_FIELDS(macro)          \
1527   CLASS_INJECTED_FIELDS(macro)              \
1528   CLASSLOADER_INJECTED_FIELDS(macro)        \
1529   RESOLVEDMETHOD_INJECTED_FIELDS(macro)     \
1530   MEMBERNAME_INJECTED_FIELDS(macro)         \
1531   CALLSITECONTEXT_INJECTED_FIELDS(macro)    \
1532   STACKFRAMEINFO_INJECTED_FIELDS(macro)     \
1533   MODULE_INJECTED_FIELDS(macro)
1534 
1535 // Interface to hard-coded offset checking
1536 
1537 class JavaClasses : AllStatic {
1538  private:
1539 
1540   static InjectedField _injected_fields[];
1541 
1542   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1543  public:
1544   enum InjectedFieldID {
1545     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1546     MAX_enum
1547   };
1548 
1549   static int compute_injected_offset(InjectedFieldID id);
1550 
1551   static void compute_hard_coded_offsets();
1552   static void compute_offsets();
1553   static void check_offsets() PRODUCT_RETURN;
1554 
1555   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1556 };
1557 
1558 #undef DECLARE_INJECTED_FIELD_ENUM
1559 
1560 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP