1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int offset_offset;
  57   static int count_offset;
  58   static int hash_offset;
  59 
  60   static bool initialized;
  61 
  62   static Handle basic_create(int length, TRAPS);
  63 
  64   static void set_offset(oop string, int offset) {
  65     assert(initialized, "Must be initialized");
  66     if (offset_offset > 0) {
  67       string->int_field_put(offset_offset, offset);
  68     }
  69   }
  70   static void set_count( oop string, int count) {
  71     assert(initialized, "Must be initialized");
  72     if (count_offset > 0) {
  73       string->int_field_put(count_offset,  count);
  74     }
  75   }
  76 
  77  public:
  78   static void compute_offsets();
  79 
  80   // Instance creation
  81   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  82   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  83   static Handle create_from_str(const char* utf8_str, TRAPS);
  84   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  85   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  86   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  87   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  88 
  89   static bool has_offset_field()  {
  90     assert(initialized, "Must be initialized");
  91     return (offset_offset > 0);
  92   }
  93 
  94   static bool has_count_field()  {
  95     assert(initialized, "Must be initialized");
  96     return (count_offset > 0);
  97   }
  98 
  99   static bool has_hash_field()  {
 100     assert(initialized, "Must be initialized");
 101     return (hash_offset > 0);
 102   }
 103 
 104   static int value_offset_in_bytes()  {
 105     assert(initialized && (value_offset > 0), "Must be initialized");
 106     return value_offset;
 107   }
 108   static int count_offset_in_bytes()  {
 109     assert(initialized && (count_offset > 0), "Must be initialized");
 110     return count_offset;
 111   }
 112   static int offset_offset_in_bytes() {
 113     assert(initialized && (offset_offset > 0), "Must be initialized");
 114     return offset_offset;
 115   }
 116   static int hash_offset_in_bytes()   {
 117     assert(initialized && (hash_offset > 0), "Must be initialized");
 118     return hash_offset;
 119   }
 120 
 121   static void set_value(oop string, typeArrayOop buffer) {
 122     assert(initialized && (value_offset > 0), "Must be initialized");
 123     string->obj_field_put(value_offset, (oop)buffer);
 124   }
 125   static void set_hash(oop string, unsigned int hash) {
 126     assert(initialized && (hash_offset > 0), "Must be initialized");
 127     string->int_field_put(hash_offset, hash);
 128   }
 129 
 130   // Accessors
 131   static typeArrayOop value(oop java_string) {
 132     assert(initialized && (value_offset > 0), "Must be initialized");
 133     assert(is_instance(java_string), "must be java_string");
 134     return (typeArrayOop) java_string->obj_field(value_offset);
 135   }
 136   static unsigned int hash(oop java_string) {
 137     assert(initialized && (hash_offset > 0), "Must be initialized");
 138     assert(is_instance(java_string), "must be java_string");
 139     return java_string->int_field(hash_offset);
 140   }
 141   static int offset(oop java_string) {
 142     assert(initialized, "Must be initialized");
 143     assert(is_instance(java_string), "must be java_string");
 144     if (offset_offset > 0) {
 145       return java_string->int_field(offset_offset);
 146     } else {
 147       return 0;
 148     }
 149   }
 150   static int length(oop java_string) {
 151     assert(initialized, "Must be initialized");
 152     assert(is_instance(java_string), "must be java_string");
 153     if (count_offset > 0) {
 154       return java_string->int_field(count_offset);
 155     } else {
 156       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
 157     }
 158   }
 159   static int utf8_length(oop java_string);
 160 
 161   // String converters
 162   static char*  as_utf8_string(oop java_string);
 163   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 164   static char*  as_utf8_string(oop java_string, int start, int len);
 165   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 166   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 167   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 168   // produce an ascii string with all other values quoted using \u####
 169   static char*  as_quoted_ascii(oop java_string);
 170 
 171   // Compute the hash value for a java.lang.String object which would
 172   // contain the characters passed in.
 173   //
 174   // As the hash value used by the String object itself, in
 175   // String.hashCode().  This value is normally calculated in Java code
 176   // in the String.hashCode method(), but is precomputed for String
 177   // objects in the shared archive file.
 178   // hash P(31) from Kernighan & Ritchie
 179   //
 180   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 181   template <typename T> static unsigned int hash_code(T* s, int len) {
 182     unsigned int h = 0;
 183     while (len-- > 0) {
 184       h = 31*h + (unsigned int) *s;
 185       s++;
 186     }
 187     return h;
 188   }
 189   static unsigned int hash_code(oop java_string);
 190 
 191   // This is the string hash code used by the StringTable, which may be
 192   // the same as String.hashCode or an alternate hash code.
 193   static unsigned int hash_string(oop java_string);
 194 
 195   static bool equals(oop java_string, jchar* chars, int len);
 196   static bool equals(oop str1, oop str2);
 197 
 198   // Conversion between '.' and '/' formats
 199   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 200   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 201 
 202   // Conversion
 203   static Symbol* as_symbol(Handle java_string, TRAPS);
 204   static Symbol* as_symbol_or_null(oop java_string);
 205 
 206   // Testers
 207   static bool is_instance(oop obj);
 208   static bool is_instance_inlined(oop obj);
 209 
 210   // Debugging
 211   static void print(oop java_string, outputStream* st);
 212   friend class JavaClasses;
 213 };
 214 
 215 
 216 // Interface to java.lang.Class objects
 217 
 218 #define CLASS_INJECTED_FIELDS(macro)                                       \
 219   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 220   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 221   macro(java_lang_Class, oop_size,               int_signature,     false) \
 222   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 223   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 224   macro(java_lang_Class, signers,                object_signature,  false)
 225 
 226 class java_lang_Class : AllStatic {
 227   friend class VMStructs;
 228 
 229  private:
 230   // The fake offsets are added by the class loader when java.lang.Class is loaded
 231 
 232   static int _klass_offset;
 233   static int _array_klass_offset;
 234 
 235   static int _oop_size_offset;
 236   static int _static_oop_field_count_offset;
 237 
 238   static int _protection_domain_offset;
 239   static int _init_lock_offset;
 240   static int _signers_offset;
 241   static int _class_loader_offset;
 242   static int _component_mirror_offset;
 243 
 244   static bool offsets_computed;
 245   static int classRedefinedCount_offset;
 246 
 247   static GrowableArray<Klass*>* _fixup_mirror_list;
 248 
 249   static void set_init_lock(oop java_class, oop init_lock);
 250   static void set_protection_domain(oop java_class, oop protection_domain);
 251   static void set_class_loader(oop java_class, oop class_loader);
 252   static void set_component_mirror(oop java_class, oop comp_mirror);
 253   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 254  public:
 255   static void compute_offsets();
 256 
 257   // Instance creation
 258   static void create_mirror(KlassHandle k, Handle class_loader,
 259                             Handle protection_domain, TRAPS);
 260   static void fixup_mirror(KlassHandle k, TRAPS);
 261   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 262   // Conversion
 263   static Klass* as_Klass(oop java_class);
 264   static void set_klass(oop java_class, Klass* klass);
 265   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 266   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 267     Klass* refk_oop = NULL;
 268     BasicType result = as_BasicType(java_class, &refk_oop);
 269     (*reference_klass) = KlassHandle(refk_oop);
 270     return result;
 271   }
 272   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 273   static void print_signature(oop java_class, outputStream *st);
 274   // Testing
 275   static bool is_instance(oop obj);
 276 
 277   static bool is_primitive(oop java_class);
 278   static BasicType primitive_type(oop java_class);
 279   static oop primitive_mirror(BasicType t);
 280   // JVM_NewArray support
 281   static Klass* array_klass(oop java_class);
 282   static void set_array_klass(oop java_class, Klass* klass);
 283   // compiler support for class operations
 284   static int klass_offset_in_bytes()                { return _klass_offset; }
 285   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 286   // Support for classRedefinedCount field
 287   static int classRedefinedCount(oop the_class_mirror);
 288   static void set_classRedefinedCount(oop the_class_mirror, int value);
 289 
 290   // Support for embedded per-class oops
 291   static oop  protection_domain(oop java_class);
 292   static oop  init_lock(oop java_class);
 293   static oop  component_mirror(oop java_class);
 294   static objArrayOop  signers(oop java_class);
 295   static void set_signers(oop java_class, objArrayOop signers);
 296 
 297   static oop class_loader(oop java_class);
 298 
 299   static int oop_size(oop java_class);
 300   static void set_oop_size(oop java_class, int size);
 301   static int static_oop_field_count(oop java_class);
 302   static void set_static_oop_field_count(oop java_class, int size);
 303 
 304   static GrowableArray<Klass*>* fixup_mirror_list() {
 305     return _fixup_mirror_list;
 306   }
 307   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 308     _fixup_mirror_list = v;
 309   }
 310   // Debugging
 311   friend class JavaClasses;
 312   friend class InstanceKlass;   // verification code accesses offsets
 313   friend class ClassFileParser; // access to number_of_fake_fields
 314 };
 315 
 316 // Interface to java.lang.Thread objects
 317 
 318 class java_lang_Thread : AllStatic {
 319  private:
 320   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 321   // so we compute the offsets at startup rather than hard-wiring them.
 322   static int _name_offset;
 323   static int _group_offset;
 324   static int _contextClassLoader_offset;
 325   static int _inheritedAccessControlContext_offset;
 326   static int _priority_offset;
 327   static int _eetop_offset;
 328   static int _daemon_offset;
 329   static int _stillborn_offset;
 330   static int _stackSize_offset;
 331   static int _tid_offset;
 332   static int _thread_status_offset;
 333   static int _park_blocker_offset;
 334   static int _park_event_offset ;
 335 
 336   static void compute_offsets();
 337 
 338  public:
 339   // Instance creation
 340   static oop create();
 341   // Returns the JavaThread associated with the thread obj
 342   static JavaThread* thread(oop java_thread);
 343   // Set JavaThread for instance
 344   static void set_thread(oop java_thread, JavaThread* thread);
 345   // Name
 346   static oop name(oop java_thread);
 347   static void set_name(oop java_thread, oop name);
 348   // Priority
 349   static ThreadPriority priority(oop java_thread);
 350   static void set_priority(oop java_thread, ThreadPriority priority);
 351   // Thread group
 352   static oop  threadGroup(oop java_thread);
 353   // Stillborn
 354   static bool is_stillborn(oop java_thread);
 355   static void set_stillborn(oop java_thread);
 356   // Alive (NOTE: this is not really a field, but provides the correct
 357   // definition without doing a Java call)
 358   static bool is_alive(oop java_thread);
 359   // Daemon
 360   static bool is_daemon(oop java_thread);
 361   static void set_daemon(oop java_thread);
 362   // Context ClassLoader
 363   static oop context_class_loader(oop java_thread);
 364   // Control context
 365   static oop inherited_access_control_context(oop java_thread);
 366   // Stack size hint
 367   static jlong stackSize(oop java_thread);
 368   // Thread ID
 369   static jlong thread_id(oop java_thread);
 370 
 371   // Blocker object responsible for thread parking
 372   static oop park_blocker(oop java_thread);
 373 
 374   // Pointer to type-stable park handler, encoded as jlong.
 375   // Should be set when apparently null
 376   // For details, see unsafe.cpp Unsafe_Unpark
 377   static jlong park_event(oop java_thread);
 378   static bool set_park_event(oop java_thread, jlong ptr);
 379 
 380   // Java Thread Status for JVMTI and M&M use.
 381   // This thread status info is saved in threadStatus field of
 382   // java.lang.Thread java class.
 383   enum ThreadStatus {
 384     NEW                      = 0,
 385     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 386                                JVMTI_THREAD_STATE_RUNNABLE,
 387     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 388                                JVMTI_THREAD_STATE_WAITING +
 389                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 390                                JVMTI_THREAD_STATE_SLEEPING,
 391     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 392                                JVMTI_THREAD_STATE_WAITING +
 393                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 394                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 395     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 396                                JVMTI_THREAD_STATE_WAITING +
 397                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 398                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 399     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 400                                JVMTI_THREAD_STATE_WAITING +
 401                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 402                                JVMTI_THREAD_STATE_PARKED,
 403     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 404                                JVMTI_THREAD_STATE_WAITING +
 405                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 406                                JVMTI_THREAD_STATE_PARKED,
 407     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 408                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 409     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 410   };
 411   // Write thread status info to threadStatus field of java.lang.Thread.
 412   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 413   // Read thread status info from threadStatus field of java.lang.Thread.
 414   static ThreadStatus get_thread_status(oop java_thread_oop);
 415 
 416   static const char*  thread_status_name(oop java_thread_oop);
 417 
 418   // Debugging
 419   friend class JavaClasses;
 420 };
 421 
 422 // Interface to java.lang.ThreadGroup objects
 423 
 424 class java_lang_ThreadGroup : AllStatic {
 425  private:
 426   static int _parent_offset;
 427   static int _name_offset;
 428   static int _threads_offset;
 429   static int _groups_offset;
 430   static int _maxPriority_offset;
 431   static int _destroyed_offset;
 432   static int _daemon_offset;
 433   static int _vmAllowSuspension_offset;
 434   static int _nthreads_offset;
 435   static int _ngroups_offset;
 436 
 437   static void compute_offsets();
 438 
 439  public:
 440   // parent ThreadGroup
 441   static oop  parent(oop java_thread_group);
 442   // name
 443   static typeArrayOop name(oop java_thread_group);
 444   // ("name as oop" accessor is not necessary)
 445   // Number of threads in group
 446   static int nthreads(oop java_thread_group);
 447   // threads
 448   static objArrayOop threads(oop java_thread_group);
 449   // Number of threads in group
 450   static int ngroups(oop java_thread_group);
 451   // groups
 452   static objArrayOop groups(oop java_thread_group);
 453   // maxPriority in group
 454   static ThreadPriority maxPriority(oop java_thread_group);
 455   // Destroyed
 456   static bool is_destroyed(oop java_thread_group);
 457   // Daemon
 458   static bool is_daemon(oop java_thread_group);
 459   // vmAllowSuspension
 460   static bool is_vmAllowSuspension(oop java_thread_group);
 461   // Debugging
 462   friend class JavaClasses;
 463 };
 464 
 465 
 466 
 467 // Interface to java.lang.Throwable objects
 468 
 469 class java_lang_Throwable: AllStatic {
 470   friend class BacktraceBuilder;
 471 
 472  private:
 473   // Offsets
 474   enum {
 475     hc_backtrace_offset     =  0,
 476     hc_detailMessage_offset =  1,
 477     hc_cause_offset         =  2,  // New since 1.4
 478     hc_stackTrace_offset    =  3   // New since 1.4
 479   };
 480   enum {
 481       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 482   };
 483   // Trace constants
 484   enum {
 485     trace_methods_offset = 0,
 486     trace_bcis_offset    = 1,
 487     trace_mirrors_offset = 2,
 488     trace_cprefs_offset  = 3,
 489     trace_next_offset    = 4,
 490     trace_size           = 5,
 491     trace_chunk_size     = 32
 492   };
 493 
 494   static int backtrace_offset;
 495   static int detailMessage_offset;
 496   static int cause_offset;
 497   static int stackTrace_offset;
 498   static int static_unassigned_stacktrace_offset;
 499 
 500   // Printing
 501   static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
 502   // StackTrace (programmatic access, new since 1.4)
 503   static void clear_stacktrace(oop throwable);
 504   // No stack trace available
 505   static const char* no_stack_trace_message();
 506   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 507   static void set_stacktrace(oop throwable, oop st_element_array);
 508   static oop unassigned_stacktrace();
 509 
 510  public:
 511   // Backtrace
 512   static oop backtrace(oop throwable);
 513   static void set_backtrace(oop throwable, oop value);
 514   // Needed by JVMTI to filter out this internal field.
 515   static int get_backtrace_offset() { return backtrace_offset;}
 516   static int get_detailMessage_offset() { return detailMessage_offset;}
 517   // Message
 518   static oop message(oop throwable);
 519   static oop message(Handle throwable);
 520   static void set_message(oop throwable, oop value);
 521   static Symbol* detail_message(oop throwable);
 522   static void print_stack_element(outputStream *st, Handle mirror, int method,
 523                                   int version, int bci, int cpref);
 524   static void print_stack_element(outputStream *st, methodHandle method, int bci);
 525   static void print_stack_usage(Handle stream);
 526 
 527   // Allocate space for backtrace (created but stack trace not filled in)
 528   static void allocate_backtrace(Handle throwable, TRAPS);
 529   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 530   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 531   // Fill in current stack trace, can cause GC
 532   static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
 533   static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
 534   // Programmatic access to stack trace
 535   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);
 536   static int  get_stack_trace_depth(oop throwable, TRAPS);
 537   // Printing
 538   static void print(oop throwable, outputStream* st);
 539   static void print(Handle throwable, outputStream* st);
 540   static void print_stack_trace(oop throwable, outputStream* st);
 541   // Debugging
 542   friend class JavaClasses;
 543 };
 544 
 545 
 546 // Interface to java.lang.reflect.AccessibleObject objects
 547 
 548 class java_lang_reflect_AccessibleObject: AllStatic {
 549  private:
 550   // Note that to reduce dependencies on the JDK we compute these
 551   // offsets at run-time.
 552   static int override_offset;
 553 
 554   static void compute_offsets();
 555 
 556  public:
 557   // Accessors
 558   static jboolean override(oop reflect);
 559   static void set_override(oop reflect, jboolean value);
 560 
 561   // Debugging
 562   friend class JavaClasses;
 563 };
 564 
 565 
 566 // Interface to java.lang.reflect.Method objects
 567 
 568 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 569  private:
 570   // Note that to reduce dependencies on the JDK we compute these
 571   // offsets at run-time.
 572   static int clazz_offset;
 573   static int name_offset;
 574   static int returnType_offset;
 575   static int parameterTypes_offset;
 576   static int exceptionTypes_offset;
 577   static int slot_offset;
 578   static int modifiers_offset;
 579   static int signature_offset;
 580   static int annotations_offset;
 581   static int parameter_annotations_offset;
 582   static int annotation_default_offset;
 583   static int type_annotations_offset;
 584 
 585   static void compute_offsets();
 586 
 587  public:
 588   // Allocation
 589   static Handle create(TRAPS);
 590 
 591   // Accessors
 592   static oop clazz(oop reflect);
 593   static void set_clazz(oop reflect, oop value);
 594 
 595   static oop name(oop method);
 596   static void set_name(oop method, oop value);
 597 
 598   static oop return_type(oop method);
 599   static void set_return_type(oop method, oop value);
 600 
 601   static oop parameter_types(oop method);
 602   static void set_parameter_types(oop method, oop value);
 603 
 604   static oop exception_types(oop method);
 605   static void set_exception_types(oop method, oop value);
 606 
 607   static int slot(oop reflect);
 608   static void set_slot(oop reflect, int value);
 609 
 610   static int modifiers(oop method);
 611   static void set_modifiers(oop method, int value);
 612 
 613   static bool has_signature_field();
 614   static oop signature(oop method);
 615   static void set_signature(oop method, oop value);
 616 
 617   static bool has_annotations_field();
 618   static oop annotations(oop method);
 619   static void set_annotations(oop method, oop value);
 620 
 621   static bool has_parameter_annotations_field();
 622   static oop parameter_annotations(oop method);
 623   static void set_parameter_annotations(oop method, oop value);
 624 
 625   static bool has_annotation_default_field();
 626   static oop annotation_default(oop method);
 627   static void set_annotation_default(oop method, oop value);
 628 
 629   static bool has_type_annotations_field();
 630   static oop type_annotations(oop method);
 631   static void set_type_annotations(oop method, oop value);
 632 
 633   // Debugging
 634   friend class JavaClasses;
 635 };
 636 
 637 
 638 // Interface to java.lang.reflect.Constructor objects
 639 
 640 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 641  private:
 642   // Note that to reduce dependencies on the JDK we compute these
 643   // offsets at run-time.
 644   static int clazz_offset;
 645   static int parameterTypes_offset;
 646   static int exceptionTypes_offset;
 647   static int slot_offset;
 648   static int modifiers_offset;
 649   static int signature_offset;
 650   static int annotations_offset;
 651   static int parameter_annotations_offset;
 652   static int type_annotations_offset;
 653 
 654   static void compute_offsets();
 655 
 656  public:
 657   // Allocation
 658   static Handle create(TRAPS);
 659 
 660   // Accessors
 661   static oop clazz(oop reflect);
 662   static void set_clazz(oop reflect, oop value);
 663 
 664   static oop parameter_types(oop constructor);
 665   static void set_parameter_types(oop constructor, oop value);
 666 
 667   static oop exception_types(oop constructor);
 668   static void set_exception_types(oop constructor, oop value);
 669 
 670   static int slot(oop reflect);
 671   static void set_slot(oop reflect, int value);
 672 
 673   static int modifiers(oop constructor);
 674   static void set_modifiers(oop constructor, int value);
 675 
 676   static bool has_signature_field();
 677   static oop signature(oop constructor);
 678   static void set_signature(oop constructor, oop value);
 679 
 680   static bool has_annotations_field();
 681   static oop annotations(oop constructor);
 682   static void set_annotations(oop constructor, oop value);
 683 
 684   static bool has_parameter_annotations_field();
 685   static oop parameter_annotations(oop method);
 686   static void set_parameter_annotations(oop method, oop value);
 687 
 688   static bool has_type_annotations_field();
 689   static oop type_annotations(oop constructor);
 690   static void set_type_annotations(oop constructor, oop value);
 691 
 692   // Debugging
 693   friend class JavaClasses;
 694 };
 695 
 696 
 697 // Interface to java.lang.reflect.Field objects
 698 
 699 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 700  private:
 701   // Note that to reduce dependencies on the JDK we compute these
 702   // offsets at run-time.
 703   static int clazz_offset;
 704   static int name_offset;
 705   static int type_offset;
 706   static int slot_offset;
 707   static int modifiers_offset;
 708   static int signature_offset;
 709   static int annotations_offset;
 710   static int type_annotations_offset;
 711 
 712   static void compute_offsets();
 713 
 714  public:
 715   // Allocation
 716   static Handle create(TRAPS);
 717 
 718   // Accessors
 719   static oop clazz(oop reflect);
 720   static void set_clazz(oop reflect, oop value);
 721 
 722   static oop name(oop field);
 723   static void set_name(oop field, oop value);
 724 
 725   static oop type(oop field);
 726   static void set_type(oop field, oop value);
 727 
 728   static int slot(oop reflect);
 729   static void set_slot(oop reflect, int value);
 730 
 731   static int modifiers(oop field);
 732   static void set_modifiers(oop field, int value);
 733 
 734   static bool has_signature_field();
 735   static oop signature(oop constructor);
 736   static void set_signature(oop constructor, oop value);
 737 
 738   static bool has_annotations_field();
 739   static oop annotations(oop constructor);
 740   static void set_annotations(oop constructor, oop value);
 741 
 742   static bool has_parameter_annotations_field();
 743   static oop parameter_annotations(oop method);
 744   static void set_parameter_annotations(oop method, oop value);
 745 
 746   static bool has_annotation_default_field();
 747   static oop annotation_default(oop method);
 748   static void set_annotation_default(oop method, oop value);
 749 
 750   static bool has_type_annotations_field();
 751   static oop type_annotations(oop field);
 752   static void set_type_annotations(oop field, oop value);
 753 
 754   // Debugging
 755   friend class JavaClasses;
 756 };
 757 
 758 class java_lang_reflect_Parameter {
 759  private:
 760   // Note that to reduce dependencies on the JDK we compute these
 761   // offsets at run-time.
 762   static int name_offset;
 763   static int modifiers_offset;
 764   static int index_offset;
 765   static int executable_offset;
 766 
 767   static void compute_offsets();
 768 
 769  public:
 770   // Allocation
 771   static Handle create(TRAPS);
 772 
 773   // Accessors
 774   static oop name(oop field);
 775   static void set_name(oop field, oop value);
 776 
 777   static int index(oop reflect);
 778   static void set_index(oop reflect, int value);
 779 
 780   static int modifiers(oop reflect);
 781   static void set_modifiers(oop reflect, int value);
 782 
 783   static oop executable(oop constructor);
 784   static void set_executable(oop constructor, oop value);
 785 
 786   friend class JavaClasses;
 787 };
 788 
 789 // Interface to sun.reflect.ConstantPool objects
 790 class sun_reflect_ConstantPool {
 791  private:
 792   // Note that to reduce dependencies on the JDK we compute these
 793   // offsets at run-time.
 794   static int _oop_offset;
 795 
 796   static void compute_offsets();
 797 
 798  public:
 799   // Allocation
 800   static Handle create(TRAPS);
 801 
 802   // Accessors
 803   static void set_cp(oop reflect, ConstantPool* value);
 804   static int oop_offset() {
 805     return _oop_offset;
 806   }
 807 
 808   static ConstantPool* get_cp(oop reflect);
 809 
 810   // Debugging
 811   friend class JavaClasses;
 812 };
 813 
 814 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
 815 class sun_reflect_UnsafeStaticFieldAccessorImpl {
 816  private:
 817   static int _base_offset;
 818   static void compute_offsets();
 819 
 820  public:
 821   static int base_offset() {
 822     return _base_offset;
 823   }
 824 
 825   // Debugging
 826   friend class JavaClasses;
 827 };
 828 
 829 // Interface to java.lang primitive type boxing objects:
 830 //  - java.lang.Boolean
 831 //  - java.lang.Character
 832 //  - java.lang.Float
 833 //  - java.lang.Double
 834 //  - java.lang.Byte
 835 //  - java.lang.Short
 836 //  - java.lang.Integer
 837 //  - java.lang.Long
 838 
 839 // This could be separated out into 8 individual classes.
 840 
 841 class java_lang_boxing_object: AllStatic {
 842  private:
 843   enum {
 844    hc_value_offset = 0
 845   };
 846   static int value_offset;
 847   static int long_value_offset;
 848 
 849   static oop initialize_and_allocate(BasicType type, TRAPS);
 850  public:
 851   // Allocation. Returns a boxed value, or NULL for invalid type.
 852   static oop create(BasicType type, jvalue* value, TRAPS);
 853   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 854   static BasicType get_value(oop box, jvalue* value);
 855   static BasicType set_value(oop box, jvalue* value);
 856   static BasicType basic_type(oop box);
 857   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 858   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 859   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 860   static void print(BasicType type, jvalue* value, outputStream* st);
 861 
 862   static int value_offset_in_bytes(BasicType type) {
 863     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 864                                                     value_offset;
 865   }
 866 
 867   // Debugging
 868   friend class JavaClasses;
 869 };
 870 
 871 
 872 
 873 // Interface to java.lang.ref.Reference objects
 874 
 875 class java_lang_ref_Reference: AllStatic {
 876  public:
 877   enum {
 878    hc_referent_offset   = 0,
 879    hc_queue_offset      = 1,
 880    hc_next_offset       = 2,
 881    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 882   };
 883   enum {
 884    hc_static_lock_offset    = 0,
 885    hc_static_pending_offset = 1
 886   };
 887 
 888   static int referent_offset;
 889   static int queue_offset;
 890   static int next_offset;
 891   static int discovered_offset;
 892   static int static_lock_offset;
 893   static int static_pending_offset;
 894   static int number_of_fake_oop_fields;
 895 
 896   // Accessors
 897   static oop referent(oop ref) {
 898     return ref->obj_field(referent_offset);
 899   }
 900   static void set_referent(oop ref, oop value) {
 901     ref->obj_field_put(referent_offset, value);
 902   }
 903   static void set_referent_raw(oop ref, oop value) {
 904     ref->obj_field_put_raw(referent_offset, value);
 905   }
 906   static HeapWord* referent_addr(oop ref) {
 907     return ref->obj_field_addr<HeapWord>(referent_offset);
 908   }
 909   static oop next(oop ref) {
 910     return ref->obj_field(next_offset);
 911   }
 912   static void set_next(oop ref, oop value) {
 913     ref->obj_field_put(next_offset, value);
 914   }
 915   static void set_next_raw(oop ref, oop value) {
 916     ref->obj_field_put_raw(next_offset, value);
 917   }
 918   static HeapWord* next_addr(oop ref) {
 919     return ref->obj_field_addr<HeapWord>(next_offset);
 920   }
 921   static oop discovered(oop ref) {
 922     return ref->obj_field(discovered_offset);
 923   }
 924   static void set_discovered(oop ref, oop value) {
 925     ref->obj_field_put(discovered_offset, value);
 926   }
 927   static void set_discovered_raw(oop ref, oop value) {
 928     ref->obj_field_put_raw(discovered_offset, value);
 929   }
 930   static HeapWord* discovered_addr(oop ref) {
 931     return ref->obj_field_addr<HeapWord>(discovered_offset);
 932   }
 933   // Accessors for statics
 934   static oop  pending_list_lock();
 935   static oop  pending_list();
 936 
 937   static HeapWord*  pending_list_lock_addr();
 938   static HeapWord*  pending_list_addr();
 939 };
 940 
 941 
 942 // Interface to java.lang.ref.SoftReference objects
 943 
 944 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 945  public:
 946   enum {
 947    // The timestamp is a long field and may need to be adjusted for alignment.
 948    hc_timestamp_offset  = hc_discovered_offset + 1
 949   };
 950   enum {
 951    hc_static_clock_offset = 0
 952   };
 953 
 954   static int timestamp_offset;
 955   static int static_clock_offset;
 956 
 957   // Accessors
 958   static jlong timestamp(oop ref);
 959 
 960   // Accessors for statics
 961   static jlong clock();
 962   static void set_clock(jlong value);
 963 };
 964 
 965 
 966 // Interface to java.lang.invoke.MethodHandle objects
 967 
 968 class MethodHandleEntry;
 969 
 970 class java_lang_invoke_MethodHandle: AllStatic {
 971   friend class JavaClasses;
 972 
 973  private:
 974   static int _type_offset;               // the MethodType of this MH
 975   static int _form_offset;               // the LambdaForm of this MH
 976 
 977   static void compute_offsets();
 978 
 979  public:
 980   // Accessors
 981   static oop            type(oop mh);
 982   static void       set_type(oop mh, oop mtype);
 983 
 984   static oop            form(oop mh);
 985   static void       set_form(oop mh, oop lform);
 986 
 987   // Testers
 988   static bool is_subclass(Klass* klass) {
 989     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 990   }
 991   static bool is_instance(oop obj);
 992 
 993   // Accessors for code generation:
 994   static int type_offset_in_bytes()             { return _type_offset; }
 995   static int form_offset_in_bytes()             { return _form_offset; }
 996 };
 997 
 998 // Interface to java.lang.invoke.DirectMethodHandle objects
 999 
1000 class java_lang_invoke_DirectMethodHandle: AllStatic {
1001   friend class JavaClasses;
1002 
1003  private:
1004   static int _member_offset;               // the MemberName of this DMH
1005 
1006   static void compute_offsets();
1007 
1008  public:
1009   // Accessors
1010   static oop  member(oop mh);
1011 
1012   // Testers
1013   static bool is_subclass(Klass* klass) {
1014     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1015   }
1016   static bool is_instance(oop obj);
1017 
1018   // Accessors for code generation:
1019   static int member_offset_in_bytes()           { return _member_offset; }
1020 };
1021 
1022 // Interface to java.lang.invoke.LambdaForm objects
1023 // (These are a private interface for managing adapter code generation.)
1024 
1025 class java_lang_invoke_LambdaForm: AllStatic {
1026   friend class JavaClasses;
1027 
1028  private:
1029   static int _vmentry_offset;  // type is MemberName
1030 
1031   static void compute_offsets();
1032 
1033  public:
1034   // Accessors
1035   static oop            vmentry(oop lform);
1036   static void       set_vmentry(oop lform, oop invoker);
1037 
1038   // Testers
1039   static bool is_subclass(Klass* klass) {
1040     return SystemDictionary::LambdaForm_klass() != NULL &&
1041       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1042   }
1043   static bool is_instance(oop obj);
1044 
1045   // Accessors for code generation:
1046   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1047 };
1048 
1049 
1050 // Interface to java.lang.invoke.MemberName objects
1051 // (These are a private interface for Java code to query the class hierarchy.)
1052 
1053 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1054   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1055   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1056   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1057 
1058 class java_lang_invoke_MemberName: AllStatic {
1059   friend class JavaClasses;
1060 
1061  private:
1062   // From java.lang.invoke.MemberName:
1063   //    private Class<?>   clazz;       // class in which the method is defined
1064   //    private String     name;        // may be null if not yet materialized
1065   //    private Object     type;        // may be null if not yet materialized
1066   //    private int        flags;       // modifier bits; see reflect.Modifier
1067   //    private intptr     vmtarget;    // VM-specific target value
1068   //    private intptr_t   vmindex;     // member index within class or interface
1069   static int _clazz_offset;
1070   static int _name_offset;
1071   static int _type_offset;
1072   static int _flags_offset;
1073   static int _vmtarget_offset;
1074   static int _vmloader_offset;
1075   static int _vmindex_offset;
1076 
1077   static void compute_offsets();
1078 
1079  public:
1080   // Accessors
1081   static oop            clazz(oop mname);
1082   static void       set_clazz(oop mname, oop clazz);
1083 
1084   static oop            type(oop mname);
1085   static void       set_type(oop mname, oop type);
1086 
1087   static oop            name(oop mname);
1088   static void       set_name(oop mname, oop name);
1089 
1090   static int            flags(oop mname);
1091   static void       set_flags(oop mname, int flags);
1092 
1093   static Metadata*      vmtarget(oop mname);
1094   static void       set_vmtarget(oop mname, Metadata* target);
1095 #if INCLUDE_JVMTI
1096   static void       adjust_vmtarget(oop mname, Method* old_method, Method* new_method,
1097                                     bool* trace_name_printed);
1098 #endif // INCLUDE_JVMTI
1099 
1100   static intptr_t       vmindex(oop mname);
1101   static void       set_vmindex(oop mname, intptr_t index);
1102 
1103   // Testers
1104   static bool is_subclass(Klass* klass) {
1105     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1106   }
1107   static bool is_instance(oop obj);
1108 
1109   static bool is_method(oop obj);
1110 
1111   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1112   enum {
1113     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1114     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1115     MN_IS_FIELD             = 0x00040000, // field
1116     MN_IS_TYPE              = 0x00080000, // nested type
1117     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1118     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1119     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1120     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1121     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1122     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1123   };
1124 
1125   // Accessors for code generation:
1126   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1127   static int type_offset_in_bytes()             { return _type_offset; }
1128   static int name_offset_in_bytes()             { return _name_offset; }
1129   static int flags_offset_in_bytes()            { return _flags_offset; }
1130   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1131   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1132 };
1133 
1134 
1135 // Interface to java.lang.invoke.MethodType objects
1136 
1137 class java_lang_invoke_MethodType: AllStatic {
1138   friend class JavaClasses;
1139 
1140  private:
1141   static int _rtype_offset;
1142   static int _ptypes_offset;
1143 
1144   static void compute_offsets();
1145 
1146  public:
1147   // Accessors
1148   static oop            rtype(oop mt);
1149   static objArrayOop    ptypes(oop mt);
1150 
1151   static oop            ptype(oop mt, int index);
1152   static int            ptype_count(oop mt);
1153 
1154   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1155   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1156 
1157   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1158   static void           print_signature(oop mt, outputStream* st);
1159 
1160   static bool is_instance(oop obj);
1161 
1162   static bool equals(oop mt1, oop mt2);
1163 
1164   // Accessors for code generation:
1165   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1166   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1167 };
1168 
1169 
1170 // Interface to java.lang.invoke.CallSite objects
1171 
1172 class java_lang_invoke_CallSite: AllStatic {
1173   friend class JavaClasses;
1174 
1175 private:
1176   static int _target_offset;
1177 
1178   static void compute_offsets();
1179 
1180 public:
1181   // Accessors
1182   static oop              target(         oop site);
1183   static void         set_target(         oop site, oop target);
1184   static void         set_target_volatile(oop site, oop target);
1185 
1186   // Testers
1187   static bool is_subclass(Klass* klass) {
1188     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1189   }
1190   static bool is_instance(oop obj);
1191 
1192   // Accessors for code generation:
1193   static int target_offset_in_bytes()           { return _target_offset; }
1194 };
1195 
1196 
1197 // Interface to java.security.AccessControlContext objects
1198 
1199 class java_security_AccessControlContext: AllStatic {
1200  private:
1201   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1202   // so we compute the offsets at startup rather than hard-wiring them.
1203   static int _context_offset;
1204   static int _privilegedContext_offset;
1205   static int _isPrivileged_offset;
1206   static int _isAuthorized_offset;
1207 
1208   static void compute_offsets();
1209  public:
1210   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1211 
1212   static bool is_authorized(Handle context);
1213 
1214   // Debugging/initialization
1215   friend class JavaClasses;
1216 };
1217 
1218 
1219 // Interface to java.lang.ClassLoader objects
1220 
1221 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1222   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1223 
1224 class java_lang_ClassLoader : AllStatic {
1225  private:
1226   // The fake offsets are added by the class loader when java.lang.Class is loaded
1227   enum {
1228    hc_parent_offset = 0
1229   };
1230   static int _loader_data_offset;
1231   static bool offsets_computed;
1232   static int parent_offset;
1233   static int parallelCapable_offset;
1234 
1235  public:
1236   static void compute_offsets();
1237 
1238   static ClassLoaderData** loader_data_addr(oop loader);
1239   static ClassLoaderData* loader_data(oop loader);
1240 
1241   static oop parent(oop loader);
1242   static bool isAncestor(oop loader, oop cl);
1243 
1244   // Support for parallelCapable field
1245   static bool parallelCapable(oop the_class_mirror);
1246 
1247   static bool is_trusted_loader(oop loader);
1248 
1249   // Fix for 4474172
1250   static oop  non_reflection_class_loader(oop loader);
1251 
1252   // Testers
1253   static bool is_subclass(Klass* klass) {
1254     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1255   }
1256   static bool is_instance(oop obj);
1257 
1258   // Debugging
1259   friend class JavaClasses;
1260   friend class ClassFileParser; // access to number_of_fake_fields
1261 };
1262 
1263 
1264 // Interface to java.lang.System objects
1265 
1266 class java_lang_System : AllStatic {
1267  private:
1268   enum {
1269    hc_static_in_offset  = 0,
1270    hc_static_out_offset = 1,
1271    hc_static_err_offset = 2,
1272    hc_static_security_offset = 3
1273   };
1274 
1275   static int  static_in_offset;
1276   static int static_out_offset;
1277   static int static_err_offset;
1278   static int static_security_offset;
1279 
1280  public:
1281   static int  in_offset_in_bytes();
1282   static int out_offset_in_bytes();
1283   static int err_offset_in_bytes();
1284 
1285   static bool has_security_manager();
1286 
1287   // Debugging
1288   friend class JavaClasses;
1289 };
1290 
1291 
1292 // Interface to java.lang.StackTraceElement objects
1293 
1294 class java_lang_StackTraceElement: AllStatic {
1295  private:
1296   enum {
1297     hc_declaringClass_offset  = 0,
1298     hc_methodName_offset = 1,
1299     hc_fileName_offset   = 2,
1300     hc_lineNumber_offset = 3
1301   };
1302 
1303   static int declaringClass_offset;
1304   static int methodName_offset;
1305   static int fileName_offset;
1306   static int lineNumber_offset;
1307 
1308  public:
1309   // Setters
1310   static void set_declaringClass(oop element, oop value);
1311   static void set_methodName(oop element, oop value);
1312   static void set_fileName(oop element, oop value);
1313   static void set_lineNumber(oop element, int value);
1314 
1315   // Create an instance of StackTraceElement
1316   static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1317   static oop create(methodHandle method, int bci, TRAPS);
1318 
1319   // Debugging
1320   friend class JavaClasses;
1321 };
1322 
1323 
1324 // Interface to java.lang.AssertionStatusDirectives objects
1325 
1326 class java_lang_AssertionStatusDirectives: AllStatic {
1327  private:
1328   enum {
1329     hc_classes_offset,
1330     hc_classEnabled_offset,
1331     hc_packages_offset,
1332     hc_packageEnabled_offset,
1333     hc_deflt_offset
1334   };
1335 
1336   static int classes_offset;
1337   static int classEnabled_offset;
1338   static int packages_offset;
1339   static int packageEnabled_offset;
1340   static int deflt_offset;
1341 
1342  public:
1343   // Setters
1344   static void set_classes(oop obj, oop val);
1345   static void set_classEnabled(oop obj, oop val);
1346   static void set_packages(oop obj, oop val);
1347   static void set_packageEnabled(oop obj, oop val);
1348   static void set_deflt(oop obj, bool val);
1349   // Debugging
1350   friend class JavaClasses;
1351 };
1352 
1353 
1354 class java_nio_Buffer: AllStatic {
1355  private:
1356   static int _limit_offset;
1357 
1358  public:
1359   static int  limit_offset();
1360   static void compute_offsets();
1361 };
1362 
1363 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1364  private:
1365   static int  _owner_offset;
1366  public:
1367   static void initialize(TRAPS);
1368   static oop  get_owner_threadObj(oop obj);
1369 };
1370 
1371 // Use to declare fields that need to be injected into Java classes
1372 // for the JVM to use.  The name_index and signature_index are
1373 // declared in vmSymbols.  The may_be_java flag is used to declare
1374 // fields that might already exist in Java but should be injected if
1375 // they don't.  Otherwise the field is unconditionally injected and
1376 // the JVM uses the injected one.  This is to ensure that name
1377 // collisions don't occur.  In general may_be_java should be false
1378 // unless there's a good reason.
1379 
1380 class InjectedField {
1381  public:
1382   const SystemDictionary::WKID klass_id;
1383   const vmSymbols::SID name_index;
1384   const vmSymbols::SID signature_index;
1385   const bool           may_be_java;
1386 
1387 
1388   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1389   Symbol* name() const      { return lookup_symbol(name_index); }
1390   Symbol* signature() const { return lookup_symbol(signature_index); }
1391 
1392   int compute_offset();
1393 
1394   // Find the Symbol for this index
1395   static Symbol* lookup_symbol(int symbol_index) {
1396     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1397   }
1398 };
1399 
1400 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1401   klass##_##name##_enum,
1402 
1403 #define ALL_INJECTED_FIELDS(macro)          \
1404   CLASS_INJECTED_FIELDS(macro)              \
1405   CLASSLOADER_INJECTED_FIELDS(macro)        \
1406   MEMBERNAME_INJECTED_FIELDS(macro)
1407 
1408 // Interface to hard-coded offset checking
1409 
1410 class JavaClasses : AllStatic {
1411  private:
1412 
1413   static InjectedField _injected_fields[];
1414 
1415   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1416   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1417   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1418 
1419  public:
1420   enum InjectedFieldID {
1421     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1422     MAX_enum
1423   };
1424 
1425   static int compute_injected_offset(InjectedFieldID id);
1426 
1427   static void compute_hard_coded_offsets();
1428   static void compute_offsets();
1429   static void check_offsets() PRODUCT_RETURN;
1430 
1431   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1432 };
1433 
1434 #undef DECLARE_INJECTED_FIELD_ENUM
1435 
1436 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP