1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int offset_offset;
  57   static int count_offset;
  58   static int hash_offset;
  59 
  60   static bool initialized;
  61 
  62   static Handle basic_create(int length, TRAPS);
  63 
  64   static void set_value( oop string, typeArrayOop buffer) {
  65     assert(initialized, "Must be initialized");
  66     string->obj_field_put(value_offset,  (oop)buffer);
  67   }
  68   static void set_offset(oop string, int offset) {
  69     assert(initialized, "Must be initialized");
  70     if (offset_offset > 0) {
  71       string->int_field_put(offset_offset, offset);
  72     }
  73   }
  74   static void set_count( oop string, int count) {
  75     assert(initialized, "Must be initialized");
  76     if (count_offset > 0) {
  77       string->int_field_put(count_offset,  count);
  78     }
  79   }
  80 
  81  public:
  82   static void compute_offsets();
  83 
  84   // Instance creation
  85   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  86   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  87   static Handle create_from_str(const char* utf8_str, TRAPS);
  88   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  89   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  90   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  91   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  92 
  93   static bool has_offset_field()  {
  94     assert(initialized, "Must be initialized");
  95     return (offset_offset > 0);
  96   }
  97 
  98   static bool has_count_field()  {
  99     assert(initialized, "Must be initialized");
 100     return (count_offset > 0);
 101   }
 102 
 103   static bool has_hash_field()  {
 104     assert(initialized, "Must be initialized");
 105     return (hash_offset > 0);
 106   }
 107 
 108   static int value_offset_in_bytes()  {
 109     assert(initialized && (value_offset > 0), "Must be initialized");
 110     return value_offset;
 111   }
 112   static int count_offset_in_bytes()  {
 113     assert(initialized && (count_offset > 0), "Must be initialized");
 114     return count_offset;
 115   }
 116   static int offset_offset_in_bytes() {
 117     assert(initialized && (offset_offset > 0), "Must be initialized");
 118     return offset_offset;
 119   }
 120   static int hash_offset_in_bytes()   {
 121     assert(initialized && (hash_offset > 0), "Must be initialized");
 122     return hash_offset;
 123   }
 124 
 125   // Accessors
 126   static typeArrayOop value(oop java_string) {
 127     assert(initialized && (value_offset > 0), "Must be initialized");
 128     assert(is_instance(java_string), "must be java_string");
 129     return (typeArrayOop) java_string->obj_field(value_offset);
 130   }
 131   static int offset(oop java_string) {
 132     assert(initialized, "Must be initialized");
 133     assert(is_instance(java_string), "must be java_string");
 134     if (offset_offset > 0) {
 135       return java_string->int_field(offset_offset);
 136     } else {
 137       return 0;
 138     }
 139   }
 140   static int length(oop java_string) {
 141     assert(initialized, "Must be initialized");
 142     assert(is_instance(java_string), "must be java_string");
 143     if (count_offset > 0) {
 144       return java_string->int_field(count_offset);
 145     } else {
 146       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
 147     }
 148   }
 149   static int utf8_length(oop java_string);
 150 
 151   // String converters
 152   static char*  as_utf8_string(oop java_string);
 153   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 154   static char*  as_utf8_string(oop java_string, int start, int len);
 155   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 156   static jchar* as_unicode_string(oop java_string, int& length);
 157   // produce an ascii string with all other values quoted using \u####
 158   static char*  as_quoted_ascii(oop java_string);
 159 
 160   // Compute the hash value for a java.lang.String object which would
 161   // contain the characters passed in.
 162   //
 163   // As the hash value used by the String object itself, in
 164   // String.hashCode().  This value is normally calculated in Java code
 165   // in the String.hashCode method(), but is precomputed for String
 166   // objects in the shared archive file.
 167   // hash P(31) from Kernighan & Ritchie
 168   //
 169   // For this reason, THIS ALGORITHM MUST MATCH String.toHash().
 170   template <typename T> static unsigned int to_hash(T* s, int len) {
 171     unsigned int h = 0;
 172     while (len-- > 0) {
 173       h = 31*h + (unsigned int) *s;
 174       s++;
 175     }
 176     return h;
 177   }
 178   static unsigned int to_hash(oop java_string);
 179 
 180   // This is the string hash code used by the StringTable, which may be
 181   // the same as String.toHash or an alternate hash code.
 182   static unsigned int hash_string(oop java_string);
 183 
 184   static bool equals(oop java_string, jchar* chars, int len);
 185 
 186   // Conversion between '.' and '/' formats
 187   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 188   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 189 
 190   // Conversion
 191   static Symbol* as_symbol(Handle java_string, TRAPS);
 192   static Symbol* as_symbol_or_null(oop java_string);
 193 
 194   // Testers
 195   static bool is_instance(oop obj) {
 196     return obj != NULL && obj->klass() == SystemDictionary::String_klass();
 197   }
 198 
 199   // Debugging
 200   static void print(Handle java_string, outputStream* st);
 201   friend class JavaClasses;
 202 };
 203 
 204 
 205 // Interface to java.lang.Class objects
 206 
 207 #define CLASS_INJECTED_FIELDS(macro)                                       \
 208   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 209   macro(java_lang_Class, resolved_constructor,   intptr_signature,  false) \
 210   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 211   macro(java_lang_Class, oop_size,               int_signature,     false) \
 212   macro(java_lang_Class, static_oop_field_count, int_signature,     false)
 213 
 214 class java_lang_Class : AllStatic {
 215   friend class VMStructs;
 216 
 217  private:
 218   // The fake offsets are added by the class loader when java.lang.Class is loaded
 219 
 220   static int _klass_offset;
 221   static int _resolved_constructor_offset;
 222   static int _array_klass_offset;
 223 
 224   static int _oop_size_offset;
 225   static int _static_oop_field_count_offset;
 226 
 227   static bool offsets_computed;
 228   static int classRedefinedCount_offset;
 229   static GrowableArray<Klass*>* _fixup_mirror_list;
 230 
 231  public:
 232   static void compute_offsets();
 233 
 234   // Instance creation
 235   static oop  create_mirror(KlassHandle k, TRAPS);
 236   static void fixup_mirror(KlassHandle k, TRAPS);
 237   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 238   // Conversion
 239   static Klass* as_Klass(oop java_class);
 240   static void set_klass(oop java_class, Klass* klass);
 241   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 242   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 243     Klass* refk_oop = NULL;
 244     BasicType result = as_BasicType(java_class, &refk_oop);
 245     (*reference_klass) = KlassHandle(refk_oop);
 246     return result;
 247   }
 248   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 249   static void print_signature(oop java_class, outputStream *st);
 250   // Testing
 251   static bool is_instance(oop obj) {
 252     return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
 253   }
 254   static bool is_primitive(oop java_class);
 255   static BasicType primitive_type(oop java_class);
 256   static oop primitive_mirror(BasicType t);
 257   // JVM_NewInstance support
 258   static Method* resolved_constructor(oop java_class);
 259   static void set_resolved_constructor(oop java_class, Method* constructor);
 260   // JVM_NewArray support
 261   static Klass* array_klass(oop java_class);
 262   static void set_array_klass(oop java_class, Klass* klass);
 263   // compiler support for class operations
 264   static int klass_offset_in_bytes()                { return _klass_offset; }
 265   static int resolved_constructor_offset_in_bytes() { return _resolved_constructor_offset; }
 266   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 267   // Support for classRedefinedCount field
 268   static int classRedefinedCount(oop the_class_mirror);
 269   static void set_classRedefinedCount(oop the_class_mirror, int value);
 270 
 271   static int oop_size(oop java_class);
 272   static void set_oop_size(oop java_class, int size);
 273   static int static_oop_field_count(oop java_class);
 274   static void set_static_oop_field_count(oop java_class, int size);
 275 
 276   static GrowableArray<Klass*>* fixup_mirror_list() {
 277     return _fixup_mirror_list;
 278   }
 279   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 280     _fixup_mirror_list = v;
 281   }
 282   // Debugging
 283   friend class JavaClasses;
 284   friend class InstanceKlass;   // verification code accesses offsets
 285   friend class ClassFileParser; // access to number_of_fake_fields
 286 };
 287 
 288 // Interface to java.lang.Thread objects
 289 
 290 class java_lang_Thread : AllStatic {
 291  private:
 292   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 293   // so we compute the offsets at startup rather than hard-wiring them.
 294   static int _name_offset;
 295   static int _group_offset;
 296   static int _contextClassLoader_offset;
 297   static int _inheritedAccessControlContext_offset;
 298   static int _priority_offset;
 299   static int _eetop_offset;
 300   static int _daemon_offset;
 301   static int _stillborn_offset;
 302   static int _stackSize_offset;
 303   static int _tid_offset;
 304   static int _thread_status_offset;
 305   static int _park_blocker_offset;
 306   static int _park_event_offset ;
 307 
 308   static void compute_offsets();
 309 
 310  public:
 311   // Instance creation
 312   static oop create();
 313   // Returns the JavaThread associated with the thread obj
 314   static JavaThread* thread(oop java_thread);
 315   // Set JavaThread for instance
 316   static void set_thread(oop java_thread, JavaThread* thread);
 317   // Name
 318   static typeArrayOop name(oop java_thread);
 319   static void set_name(oop java_thread, typeArrayOop name);
 320   // Priority
 321   static ThreadPriority priority(oop java_thread);
 322   static void set_priority(oop java_thread, ThreadPriority priority);
 323   // Thread group
 324   static oop  threadGroup(oop java_thread);
 325   // Stillborn
 326   static bool is_stillborn(oop java_thread);
 327   static void set_stillborn(oop java_thread);
 328   // Alive (NOTE: this is not really a field, but provides the correct
 329   // definition without doing a Java call)
 330   static bool is_alive(oop java_thread);
 331   // Daemon
 332   static bool is_daemon(oop java_thread);
 333   static void set_daemon(oop java_thread);
 334   // Context ClassLoader
 335   static oop context_class_loader(oop java_thread);
 336   // Control context
 337   static oop inherited_access_control_context(oop java_thread);
 338   // Stack size hint
 339   static jlong stackSize(oop java_thread);
 340   // Thread ID
 341   static jlong thread_id(oop java_thread);
 342 
 343   // Blocker object responsible for thread parking
 344   static oop park_blocker(oop java_thread);
 345 
 346   // Pointer to type-stable park handler, encoded as jlong.
 347   // Should be set when apparently null
 348   // For details, see unsafe.cpp Unsafe_Unpark
 349   static jlong park_event(oop java_thread);
 350   static bool set_park_event(oop java_thread, jlong ptr);
 351 
 352   // Java Thread Status for JVMTI and M&M use.
 353   // This thread status info is saved in threadStatus field of
 354   // java.lang.Thread java class.
 355   enum ThreadStatus {
 356     NEW                      = 0,
 357     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 358                                JVMTI_THREAD_STATE_RUNNABLE,
 359     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 360                                JVMTI_THREAD_STATE_WAITING +
 361                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 362                                JVMTI_THREAD_STATE_SLEEPING,
 363     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 364                                JVMTI_THREAD_STATE_WAITING +
 365                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 366                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 367     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 368                                JVMTI_THREAD_STATE_WAITING +
 369                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 370                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 371     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 372                                JVMTI_THREAD_STATE_WAITING +
 373                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 374                                JVMTI_THREAD_STATE_PARKED,
 375     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 376                                JVMTI_THREAD_STATE_WAITING +
 377                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 378                                JVMTI_THREAD_STATE_PARKED,
 379     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 380                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 381     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 382   };
 383   // Write thread status info to threadStatus field of java.lang.Thread.
 384   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 385   // Read thread status info from threadStatus field of java.lang.Thread.
 386   static ThreadStatus get_thread_status(oop java_thread_oop);
 387 
 388   static const char*  thread_status_name(oop java_thread_oop);
 389 
 390   // Debugging
 391   friend class JavaClasses;
 392 };
 393 
 394 // Interface to java.lang.ThreadGroup objects
 395 
 396 class java_lang_ThreadGroup : AllStatic {
 397  private:
 398   static int _parent_offset;
 399   static int _name_offset;
 400   static int _threads_offset;
 401   static int _groups_offset;
 402   static int _maxPriority_offset;
 403   static int _destroyed_offset;
 404   static int _daemon_offset;
 405   static int _vmAllowSuspension_offset;
 406   static int _nthreads_offset;
 407   static int _ngroups_offset;
 408 
 409   static void compute_offsets();
 410 
 411  public:
 412   // parent ThreadGroup
 413   static oop  parent(oop java_thread_group);
 414   // name
 415   static typeArrayOop name(oop java_thread_group);
 416   // ("name as oop" accessor is not necessary)
 417   // Number of threads in group
 418   static int nthreads(oop java_thread_group);
 419   // threads
 420   static objArrayOop threads(oop java_thread_group);
 421   // Number of threads in group
 422   static int ngroups(oop java_thread_group);
 423   // groups
 424   static objArrayOop groups(oop java_thread_group);
 425   // maxPriority in group
 426   static ThreadPriority maxPriority(oop java_thread_group);
 427   // Destroyed
 428   static bool is_destroyed(oop java_thread_group);
 429   // Daemon
 430   static bool is_daemon(oop java_thread_group);
 431   // vmAllowSuspension
 432   static bool is_vmAllowSuspension(oop java_thread_group);
 433   // Debugging
 434   friend class JavaClasses;
 435 };
 436 
 437 
 438 
 439 // Interface to java.lang.Throwable objects
 440 
 441 class java_lang_Throwable: AllStatic {
 442   friend class BacktraceBuilder;
 443 
 444  private:
 445   // Offsets
 446   enum {
 447     hc_backtrace_offset     =  0,
 448     hc_detailMessage_offset =  1,
 449     hc_cause_offset         =  2,  // New since 1.4
 450     hc_stackTrace_offset    =  3   // New since 1.4
 451   };
 452   enum {
 453       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 454   };
 455   // Trace constants
 456   enum {
 457     trace_methods_offset = 0,
 458     trace_bcis_offset    = 1,
 459     trace_mirrors_offset = 2,
 460     trace_next_offset    = 3,
 461     trace_size           = 4,
 462     trace_chunk_size     = 32
 463   };
 464 
 465   static int backtrace_offset;
 466   static int detailMessage_offset;
 467   static int cause_offset;
 468   static int stackTrace_offset;
 469   static int static_unassigned_stacktrace_offset;
 470 
 471   // Printing
 472   static char* print_stack_element_to_buffer(Method* method, int bci);
 473   static void print_to_stream(Handle stream, const char* str);
 474   // StackTrace (programmatic access, new since 1.4)
 475   static void clear_stacktrace(oop throwable);
 476   // No stack trace available
 477   static const char* no_stack_trace_message();
 478   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 479   static void set_stacktrace(oop throwable, oop st_element_array);
 480   static oop unassigned_stacktrace();
 481 
 482  public:
 483   // Backtrace
 484   static oop backtrace(oop throwable);
 485   static void set_backtrace(oop throwable, oop value);
 486   // Needed by JVMTI to filter out this internal field.
 487   static int get_backtrace_offset() { return backtrace_offset;}
 488   static int get_detailMessage_offset() { return detailMessage_offset;}
 489   // Message
 490   static oop message(oop throwable);
 491   static oop message(Handle throwable);
 492   static void set_message(oop throwable, oop value);
 493   // Print stack trace stored in exception by call-back to Java
 494   // Note: this is no longer used in Merlin, but we still suppport
 495   // it for compatibility.
 496   static void print_stack_trace(oop throwable, oop print_stream);
 497   static void print_stack_element(Handle stream, Method* method, int bci);
 498   static void print_stack_element(outputStream *st, Method* method, int bci);
 499   static void print_stack_usage(Handle stream);
 500 
 501   // Allocate space for backtrace (created but stack trace not filled in)
 502   static void allocate_backtrace(Handle throwable, TRAPS);
 503   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 504   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 505   // Fill in current stack trace, can cause GC
 506   static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
 507   static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
 508   // Programmatic access to stack trace
 509   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);
 510   static int  get_stack_trace_depth(oop throwable, TRAPS);
 511   // Printing
 512   static void print(oop throwable, outputStream* st);
 513   static void print(Handle throwable, outputStream* st);
 514   static void print_stack_trace(oop throwable, outputStream* st);
 515   // Debugging
 516   friend class JavaClasses;
 517 };
 518 
 519 
 520 // Interface to java.lang.reflect.AccessibleObject objects
 521 
 522 class java_lang_reflect_AccessibleObject: AllStatic {
 523  private:
 524   // Note that to reduce dependencies on the JDK we compute these
 525   // offsets at run-time.
 526   static int override_offset;
 527 
 528   static void compute_offsets();
 529 
 530  public:
 531   // Accessors
 532   static jboolean override(oop reflect);
 533   static void set_override(oop reflect, jboolean value);
 534 
 535   // Debugging
 536   friend class JavaClasses;
 537 };
 538 
 539 
 540 // Interface to java.lang.reflect.Method objects
 541 
 542 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 543  private:
 544   // Note that to reduce dependencies on the JDK we compute these
 545   // offsets at run-time.
 546   static int clazz_offset;
 547   static int name_offset;
 548   static int returnType_offset;
 549   static int parameterTypes_offset;
 550   static int exceptionTypes_offset;
 551   static int slot_offset;
 552   static int modifiers_offset;
 553   static int signature_offset;
 554   static int annotations_offset;
 555   static int parameter_annotations_offset;
 556   static int annotation_default_offset;
 557 
 558   static void compute_offsets();
 559 
 560  public:
 561   // Allocation
 562   static Handle create(TRAPS);
 563 
 564   // Accessors
 565   static oop clazz(oop reflect);
 566   static void set_clazz(oop reflect, oop value);
 567 
 568   static oop name(oop method);
 569   static void set_name(oop method, oop value);
 570 
 571   static oop return_type(oop method);
 572   static void set_return_type(oop method, oop value);
 573 
 574   static oop parameter_types(oop method);
 575   static void set_parameter_types(oop method, oop value);
 576 
 577   static oop exception_types(oop method);
 578   static void set_exception_types(oop method, oop value);
 579 
 580   static int slot(oop reflect);
 581   static void set_slot(oop reflect, int value);
 582 
 583   static int modifiers(oop method);
 584   static void set_modifiers(oop method, int value);
 585 
 586   static bool has_signature_field();
 587   static oop signature(oop method);
 588   static void set_signature(oop method, oop value);
 589 
 590   static bool has_annotations_field();
 591   static oop annotations(oop method);
 592   static void set_annotations(oop method, oop value);
 593 
 594   static bool has_parameter_annotations_field();
 595   static oop parameter_annotations(oop method);
 596   static void set_parameter_annotations(oop method, oop value);
 597 
 598   static bool has_annotation_default_field();
 599   static oop annotation_default(oop method);
 600   static void set_annotation_default(oop method, oop value);
 601 
 602   // Debugging
 603   friend class JavaClasses;
 604 };
 605 
 606 
 607 // Interface to java.lang.reflect.Constructor objects
 608 
 609 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 610  private:
 611   // Note that to reduce dependencies on the JDK we compute these
 612   // offsets at run-time.
 613   static int clazz_offset;
 614   static int parameterTypes_offset;
 615   static int exceptionTypes_offset;
 616   static int slot_offset;
 617   static int modifiers_offset;
 618   static int signature_offset;
 619   static int annotations_offset;
 620   static int parameter_annotations_offset;
 621 
 622   static void compute_offsets();
 623 
 624  public:
 625   // Allocation
 626   static Handle create(TRAPS);
 627 
 628   // Accessors
 629   static oop clazz(oop reflect);
 630   static void set_clazz(oop reflect, oop value);
 631 
 632   static oop parameter_types(oop constructor);
 633   static void set_parameter_types(oop constructor, oop value);
 634 
 635   static oop exception_types(oop constructor);
 636   static void set_exception_types(oop constructor, oop value);
 637 
 638   static int slot(oop reflect);
 639   static void set_slot(oop reflect, int value);
 640 
 641   static int modifiers(oop constructor);
 642   static void set_modifiers(oop constructor, int value);
 643 
 644   static bool has_signature_field();
 645   static oop signature(oop constructor);
 646   static void set_signature(oop constructor, oop value);
 647 
 648   static bool has_annotations_field();
 649   static oop annotations(oop constructor);
 650   static void set_annotations(oop constructor, oop value);
 651 
 652   static bool has_parameter_annotations_field();
 653   static oop parameter_annotations(oop method);
 654   static void set_parameter_annotations(oop method, oop value);
 655 
 656   // Debugging
 657   friend class JavaClasses;
 658 };
 659 
 660 
 661 // Interface to java.lang.reflect.Field objects
 662 
 663 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 664  private:
 665   // Note that to reduce dependencies on the JDK we compute these
 666   // offsets at run-time.
 667   static int clazz_offset;
 668   static int name_offset;
 669   static int type_offset;
 670   static int slot_offset;
 671   static int modifiers_offset;
 672   static int signature_offset;
 673   static int annotations_offset;
 674 
 675   static void compute_offsets();
 676 
 677  public:
 678   // Allocation
 679   static Handle create(TRAPS);
 680 
 681   // Accessors
 682   static oop clazz(oop reflect);
 683   static void set_clazz(oop reflect, oop value);
 684 
 685   static oop name(oop field);
 686   static void set_name(oop field, oop value);
 687 
 688   static oop type(oop field);
 689   static void set_type(oop field, oop value);
 690 
 691   static int slot(oop reflect);
 692   static void set_slot(oop reflect, int value);
 693 
 694   static int modifiers(oop field);
 695   static void set_modifiers(oop field, int value);
 696 
 697   static bool has_signature_field();
 698   static oop signature(oop constructor);
 699   static void set_signature(oop constructor, oop value);
 700 
 701   static bool has_annotations_field();
 702   static oop annotations(oop constructor);
 703   static void set_annotations(oop constructor, oop value);
 704 
 705   static bool has_parameter_annotations_field();
 706   static oop parameter_annotations(oop method);
 707   static void set_parameter_annotations(oop method, oop value);
 708 
 709   static bool has_annotation_default_field();
 710   static oop annotation_default(oop method);
 711   static void set_annotation_default(oop method, oop value);
 712 
 713   // Debugging
 714   friend class JavaClasses;
 715 };
 716 
 717 // Interface to sun.reflect.ConstantPool objects
 718 class sun_reflect_ConstantPool {
 719  private:
 720   // Note that to reduce dependencies on the JDK we compute these
 721   // offsets at run-time.
 722   static int _oop_offset;
 723 
 724   static void compute_offsets();
 725 
 726  public:
 727   // Allocation
 728   static Handle create(TRAPS);
 729 
 730   // Accessors
 731   static void set_cp(oop reflect, ConstantPool* value);
 732   static int oop_offset() {
 733     return _oop_offset;
 734   }
 735 
 736   static ConstantPool* get_cp(oop reflect);
 737 
 738   // Debugging
 739   friend class JavaClasses;
 740 };
 741 
 742 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
 743 class sun_reflect_UnsafeStaticFieldAccessorImpl {
 744  private:
 745   static int _base_offset;
 746   static void compute_offsets();
 747 
 748  public:
 749   static int base_offset() {
 750     return _base_offset;
 751   }
 752 
 753   // Debugging
 754   friend class JavaClasses;
 755 };
 756 
 757 // Interface to java.lang primitive type boxing objects:
 758 //  - java.lang.Boolean
 759 //  - java.lang.Character
 760 //  - java.lang.Float
 761 //  - java.lang.Double
 762 //  - java.lang.Byte
 763 //  - java.lang.Short
 764 //  - java.lang.Integer
 765 //  - java.lang.Long
 766 
 767 // This could be separated out into 8 individual classes.
 768 
 769 class java_lang_boxing_object: AllStatic {
 770  private:
 771   enum {
 772    hc_value_offset = 0
 773   };
 774   static int value_offset;
 775   static int long_value_offset;
 776 
 777   static oop initialize_and_allocate(BasicType type, TRAPS);
 778  public:
 779   // Allocation. Returns a boxed value, or NULL for invalid type.
 780   static oop create(BasicType type, jvalue* value, TRAPS);
 781   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 782   static BasicType get_value(oop box, jvalue* value);
 783   static BasicType set_value(oop box, jvalue* value);
 784   static BasicType basic_type(oop box);
 785   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 786   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 787   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 788   static void print(BasicType type, jvalue* value, outputStream* st);
 789 
 790   static int value_offset_in_bytes(BasicType type) {
 791     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 792                                                     value_offset;
 793   }
 794 
 795   // Debugging
 796   friend class JavaClasses;
 797 };
 798 
 799 
 800 
 801 // Interface to java.lang.ref.Reference objects
 802 
 803 class java_lang_ref_Reference: AllStatic {
 804  public:
 805   enum {
 806    hc_referent_offset   = 0,
 807    hc_queue_offset      = 1,
 808    hc_next_offset       = 2,
 809    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 810   };
 811   enum {
 812    hc_static_lock_offset    = 0,
 813    hc_static_pending_offset = 1
 814   };
 815 
 816   static int referent_offset;
 817   static int queue_offset;
 818   static int next_offset;
 819   static int discovered_offset;
 820   static int static_lock_offset;
 821   static int static_pending_offset;
 822   static int number_of_fake_oop_fields;
 823 
 824   // Accessors
 825   static oop referent(oop ref) {
 826     return ref->obj_field(referent_offset);
 827   }
 828   static void set_referent(oop ref, oop value) {
 829     ref->obj_field_put(referent_offset, value);
 830   }
 831   static void set_referent_raw(oop ref, oop value) {
 832     ref->obj_field_put_raw(referent_offset, value);
 833   }
 834   static HeapWord* referent_addr(oop ref) {
 835     return ref->obj_field_addr<HeapWord>(referent_offset);
 836   }
 837   static oop next(oop ref) {
 838     return ref->obj_field(next_offset);
 839   }
 840   static void set_next(oop ref, oop value) {
 841     ref->obj_field_put(next_offset, value);
 842   }
 843   static void set_next_raw(oop ref, oop value) {
 844     ref->obj_field_put_raw(next_offset, value);
 845   }
 846   static HeapWord* next_addr(oop ref) {
 847     return ref->obj_field_addr<HeapWord>(next_offset);
 848   }
 849   static oop discovered(oop ref) {
 850     return ref->obj_field(discovered_offset);
 851   }
 852   static void set_discovered(oop ref, oop value) {
 853     ref->obj_field_put(discovered_offset, value);
 854   }
 855   static void set_discovered_raw(oop ref, oop value) {
 856     ref->obj_field_put_raw(discovered_offset, value);
 857   }
 858   static HeapWord* discovered_addr(oop ref) {
 859     return ref->obj_field_addr<HeapWord>(discovered_offset);
 860   }
 861   // Accessors for statics
 862   static oop  pending_list_lock();
 863   static oop  pending_list();
 864 
 865   static HeapWord*  pending_list_lock_addr();
 866   static HeapWord*  pending_list_addr();
 867 };
 868 
 869 
 870 // Interface to java.lang.ref.SoftReference objects
 871 
 872 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 873  public:
 874   enum {
 875    // The timestamp is a long field and may need to be adjusted for alignment.
 876    hc_timestamp_offset  = hc_discovered_offset + 1
 877   };
 878   enum {
 879    hc_static_clock_offset = 0
 880   };
 881 
 882   static int timestamp_offset;
 883   static int static_clock_offset;
 884 
 885   // Accessors
 886   static jlong timestamp(oop ref);
 887 
 888   // Accessors for statics
 889   static jlong clock();
 890   static void set_clock(jlong value);
 891 };
 892 
 893 
 894 // Interface to java.lang.invoke.MethodHandle objects
 895 
 896 class MethodHandleEntry;
 897 
 898 class java_lang_invoke_MethodHandle: AllStatic {
 899   friend class JavaClasses;
 900 
 901  private:
 902   static int _type_offset;               // the MethodType of this MH
 903   static int _form_offset;               // the LambdaForm of this MH
 904 
 905   static void compute_offsets();
 906 
 907  public:
 908   // Accessors
 909   static oop            type(oop mh);
 910   static void       set_type(oop mh, oop mtype);
 911 
 912   static oop            form(oop mh);
 913   static void       set_form(oop mh, oop lform);
 914 
 915   // Testers
 916   static bool is_subclass(Klass* klass) {
 917     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 918   }
 919   static bool is_instance(oop obj) {
 920     return obj != NULL && is_subclass(obj->klass());
 921   }
 922 
 923   // Accessors for code generation:
 924   static int type_offset_in_bytes()             { return _type_offset; }
 925   static int form_offset_in_bytes()             { return _form_offset; }
 926 };
 927 
 928 // Interface to java.lang.invoke.LambdaForm objects
 929 // (These are a private interface for managing adapter code generation.)
 930 
 931 class java_lang_invoke_LambdaForm: AllStatic {
 932   friend class JavaClasses;
 933 
 934  private:
 935   static int _vmentry_offset;  // type is MemberName
 936 
 937   static void compute_offsets();
 938 
 939  public:
 940   // Accessors
 941   static oop            vmentry(oop lform);
 942   static void       set_vmentry(oop lform, oop invoker);
 943 
 944   // Testers
 945   static bool is_subclass(Klass* klass) {
 946     return SystemDictionary::LambdaForm_klass() != NULL &&
 947       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
 948   }
 949   static bool is_instance(oop obj) {
 950     return obj != NULL && is_subclass(obj->klass());
 951   }
 952 
 953   // Accessors for code generation:
 954   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
 955 };
 956 
 957 
 958 // Interface to java.lang.invoke.MemberName objects
 959 // (These are a private interface for Java code to query the class hierarchy.)
 960 
 961 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
 962   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
 963   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
 964   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
 965 
 966 class java_lang_invoke_MemberName: AllStatic {
 967   friend class JavaClasses;
 968 
 969  private:
 970   // From java.lang.invoke.MemberName:
 971   //    private Class<?>   clazz;       // class in which the method is defined
 972   //    private String     name;        // may be null if not yet materialized
 973   //    private Object     type;        // may be null if not yet materialized
 974   //    private int        flags;       // modifier bits; see reflect.Modifier
 975   //    private intptr     vmtarget;    // VM-specific target value
 976   //    private intptr_t   vmindex;     // member index within class or interface
 977   static int _clazz_offset;
 978   static int _name_offset;
 979   static int _type_offset;
 980   static int _flags_offset;
 981   static int _vmtarget_offset;
 982   static int _vmloader_offset;
 983   static int _vmindex_offset;
 984 
 985   static void compute_offsets();
 986 
 987  public:
 988   // Accessors
 989   static oop            clazz(oop mname);
 990   static void       set_clazz(oop mname, oop clazz);
 991 
 992   static oop            type(oop mname);
 993   static void       set_type(oop mname, oop type);
 994 
 995   static oop            name(oop mname);
 996   static void       set_name(oop mname, oop name);
 997 
 998   static int            flags(oop mname);
 999   static void       set_flags(oop mname, int flags);
1000 
1001   static Metadata*      vmtarget(oop mname);
1002   static void       set_vmtarget(oop mname, Metadata* target);
1003 
1004   static intptr_t       vmindex(oop mname);
1005   static void       set_vmindex(oop mname, intptr_t index);
1006 
1007   // Testers
1008   static bool is_subclass(Klass* klass) {
1009     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1010   }
1011   static bool is_instance(oop obj) {
1012     return obj != NULL && is_subclass(obj->klass());
1013   }
1014 
1015   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1016   enum {
1017     MN_IS_METHOD           = 0x00010000, // method (not constructor)
1018     MN_IS_CONSTRUCTOR      = 0x00020000, // constructor
1019     MN_IS_FIELD            = 0x00040000, // field
1020     MN_IS_TYPE             = 0x00080000, // nested type
1021     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1022     MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1023     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1024     MN_SEARCH_SUPERCLASSES = 0x00100000, // walk super classes
1025     MN_SEARCH_INTERFACES   = 0x00200000  // walk implemented interfaces
1026   };
1027 
1028   // Accessors for code generation:
1029   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1030   static int type_offset_in_bytes()             { return _type_offset; }
1031   static int name_offset_in_bytes()             { return _name_offset; }
1032   static int flags_offset_in_bytes()            { return _flags_offset; }
1033   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1034   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1035 };
1036 
1037 
1038 // Interface to java.lang.invoke.MethodType objects
1039 
1040 class java_lang_invoke_MethodType: AllStatic {
1041   friend class JavaClasses;
1042 
1043  private:
1044   static int _rtype_offset;
1045   static int _ptypes_offset;
1046 
1047   static void compute_offsets();
1048 
1049  public:
1050   // Accessors
1051   static oop            rtype(oop mt);
1052   static objArrayOop    ptypes(oop mt);
1053 
1054   static oop            ptype(oop mt, int index);
1055   static int            ptype_count(oop mt);
1056 
1057   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1058   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1059 
1060   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1061   static void           print_signature(oop mt, outputStream* st);
1062 
1063   static bool is_instance(oop obj) {
1064     return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1065   }
1066 
1067   static bool equals(oop mt1, oop mt2);
1068 
1069   // Accessors for code generation:
1070   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1071   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1072 };
1073 
1074 
1075 // Interface to java.lang.invoke.CallSite objects
1076 
1077 class java_lang_invoke_CallSite: AllStatic {
1078   friend class JavaClasses;
1079 
1080 private:
1081   static int _target_offset;
1082 
1083   static void compute_offsets();
1084 
1085 public:
1086   // Accessors
1087   static oop              target(         oop site)             { return site->obj_field(             _target_offset);         }
1088   static void         set_target(         oop site, oop target) {        site->obj_field_put(         _target_offset, target); }
1089 
1090   static volatile oop     target_volatile(oop site)             { return site->obj_field_volatile(    _target_offset);         }
1091   static void         set_target_volatile(oop site, oop target) {        site->obj_field_put_volatile(_target_offset, target); }
1092 
1093   // Testers
1094   static bool is_subclass(Klass* klass) {
1095     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1096   }
1097   static bool is_instance(oop obj) {
1098     return obj != NULL && is_subclass(obj->klass());
1099   }
1100 
1101   // Accessors for code generation:
1102   static int target_offset_in_bytes()           { return _target_offset; }
1103 };
1104 
1105 
1106 // Interface to java.security.AccessControlContext objects
1107 
1108 class java_security_AccessControlContext: AllStatic {
1109  private:
1110   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1111   // so we compute the offsets at startup rather than hard-wiring them.
1112   static int _context_offset;
1113   static int _privilegedContext_offset;
1114   static int _isPrivileged_offset;
1115 
1116   static void compute_offsets();
1117  public:
1118   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1119 
1120   // Debugging/initialization
1121   friend class JavaClasses;
1122 };
1123 
1124 
1125 // Interface to java.lang.ClassLoader objects
1126 
1127 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1128   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1129 
1130 class java_lang_ClassLoader : AllStatic {
1131  private:
1132   // The fake offsets are added by the class loader when java.lang.Class is loaded
1133   enum {
1134    hc_parent_offset = 0
1135   };
1136   static int _loader_data_offset;
1137   static bool offsets_computed;
1138   static int parent_offset;
1139   static int parallelCapable_offset;
1140   static int fullyConcurrent_offset;
1141 
1142  public:
1143   static void compute_offsets();
1144 
1145   static ClassLoaderData** loader_data_addr(oop loader);
1146   static ClassLoaderData* loader_data(oop loader);
1147 
1148   static oop parent(oop loader);
1149   static bool isAncestor(oop loader, oop cl);
1150 
1151   // Support for parallelCapable field
1152   static bool parallelCapable(oop the_class_mirror);
1153 
1154   // Support for fullyConcurrent field
1155   static bool fullyConcurrent(oop the_class_mirror);
1156 
1157   static bool is_trusted_loader(oop loader);
1158 
1159   // Fix for 4474172
1160   static oop  non_reflection_class_loader(oop loader);
1161 
1162   // Testers
1163   static bool is_subclass(Klass* klass) {
1164     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1165   }
1166   static bool is_instance(oop obj) {
1167     return obj != NULL && is_subclass(obj->klass());
1168   }
1169 
1170   // Debugging
1171   friend class JavaClasses;
1172   friend class ClassFileParser; // access to number_of_fake_fields
1173 };
1174 
1175 
1176 // Interface to java.lang.System objects
1177 
1178 class java_lang_System : AllStatic {
1179  private:
1180   enum {
1181    hc_static_in_offset  = 0,
1182    hc_static_out_offset = 1,
1183    hc_static_err_offset = 2
1184   };
1185 
1186   static int  static_in_offset;
1187   static int static_out_offset;
1188   static int static_err_offset;
1189 
1190  public:
1191   static int  in_offset_in_bytes();
1192   static int out_offset_in_bytes();
1193   static int err_offset_in_bytes();
1194 
1195   // Debugging
1196   friend class JavaClasses;
1197 };
1198 
1199 
1200 // Interface to java.lang.StackTraceElement objects
1201 
1202 class java_lang_StackTraceElement: AllStatic {
1203  private:
1204   enum {
1205     hc_declaringClass_offset  = 0,
1206     hc_methodName_offset = 1,
1207     hc_fileName_offset   = 2,
1208     hc_lineNumber_offset = 3
1209   };
1210 
1211   static int declaringClass_offset;
1212   static int methodName_offset;
1213   static int fileName_offset;
1214   static int lineNumber_offset;
1215 
1216  public:
1217   // Setters
1218   static void set_declaringClass(oop element, oop value);
1219   static void set_methodName(oop element, oop value);
1220   static void set_fileName(oop element, oop value);
1221   static void set_lineNumber(oop element, int value);
1222 
1223   // Create an instance of StackTraceElement
1224   static oop create(methodHandle m, int bci, TRAPS);
1225 
1226   // Debugging
1227   friend class JavaClasses;
1228 };
1229 
1230 
1231 // Interface to java.lang.AssertionStatusDirectives objects
1232 
1233 class java_lang_AssertionStatusDirectives: AllStatic {
1234  private:
1235   enum {
1236     hc_classes_offset,
1237     hc_classEnabled_offset,
1238     hc_packages_offset,
1239     hc_packageEnabled_offset,
1240     hc_deflt_offset
1241   };
1242 
1243   static int classes_offset;
1244   static int classEnabled_offset;
1245   static int packages_offset;
1246   static int packageEnabled_offset;
1247   static int deflt_offset;
1248 
1249  public:
1250   // Setters
1251   static void set_classes(oop obj, oop val);
1252   static void set_classEnabled(oop obj, oop val);
1253   static void set_packages(oop obj, oop val);
1254   static void set_packageEnabled(oop obj, oop val);
1255   static void set_deflt(oop obj, bool val);
1256   // Debugging
1257   friend class JavaClasses;
1258 };
1259 
1260 
1261 class java_nio_Buffer: AllStatic {
1262  private:
1263   static int _limit_offset;
1264 
1265  public:
1266   static int  limit_offset();
1267   static void compute_offsets();
1268 };
1269 
1270 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1271  private:
1272   static int  _owner_offset;
1273  public:
1274   static void initialize(TRAPS);
1275   static oop  get_owner_threadObj(oop obj);
1276 };
1277 
1278 // Use to declare fields that need to be injected into Java classes
1279 // for the JVM to use.  The name_index and signature_index are
1280 // declared in vmSymbols.  The may_be_java flag is used to declare
1281 // fields that might already exist in Java but should be injected if
1282 // they don't.  Otherwise the field is unconditionally injected and
1283 // the JVM uses the injected one.  This is to ensure that name
1284 // collisions don't occur.  In general may_be_java should be false
1285 // unless there's a good reason.
1286 
1287 class InjectedField {
1288  public:
1289   const SystemDictionary::WKID klass_id;
1290   const vmSymbols::SID name_index;
1291   const vmSymbols::SID signature_index;
1292   const bool           may_be_java;
1293 
1294 
1295   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1296   Symbol* name() const      { return lookup_symbol(name_index); }
1297   Symbol* signature() const { return lookup_symbol(signature_index); }
1298 
1299   int compute_offset();
1300 
1301   // Find the Symbol for this index
1302   static Symbol* lookup_symbol(int symbol_index) {
1303     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1304   }
1305 };
1306 
1307 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1308   klass##_##name##_enum,
1309 
1310 #define ALL_INJECTED_FIELDS(macro)          \
1311   CLASS_INJECTED_FIELDS(macro)              \
1312   CLASSLOADER_INJECTED_FIELDS(macro)        \
1313   MEMBERNAME_INJECTED_FIELDS(macro)
1314 
1315 // Interface to hard-coded offset checking
1316 
1317 class JavaClasses : AllStatic {
1318  private:
1319 
1320   static InjectedField _injected_fields[];
1321 
1322   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1323   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1324   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1325 
1326  public:
1327   enum InjectedFieldID {
1328     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1329     MAX_enum
1330   };
1331 
1332   static int compute_injected_offset(InjectedFieldID id);
1333 
1334   static void compute_hard_coded_offsets();
1335   static void compute_offsets();
1336   static void check_offsets() PRODUCT_RETURN;
1337 
1338   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1339 };
1340 
1341 #undef DECLARE_INJECTED_FIELD_ENUM
1342 
1343 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP