1 /*
   2  * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int 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       oop value = java_string->obj_field(value_offset);
 157       return ((typeArrayOop) value)->length();
 158     }
 159   }
 160   static int utf8_length(oop java_string);
 161 
 162   // String converters
 163   static char*  as_utf8_string(oop java_string);
 164   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 165   static char*  as_utf8_string(oop java_string, int start, int len);
 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     return obj != NULL && obj->klass() == SystemDictionary::String_klass();
 209   }
 210 
 211   // Debugging
 212   static void print(oop java_string, outputStream* st);
 213   friend class JavaClasses;
 214 };
 215 
 216 
 217 // Interface to java.lang.Class objects
 218 
 219 #define CLASS_INJECTED_FIELDS(macro)                                       \
 220   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 221   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 222   macro(java_lang_Class, oop_size,               int_signature,     false) \
 223   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 224   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 225   macro(java_lang_Class, init_lock,              object_signature,  false) \
 226   macro(java_lang_Class, signers,                object_signature,  false)
 227 
 228 class java_lang_Class : AllStatic {
 229   friend class VMStructs;
 230 
 231  private:
 232   // The fake offsets are added by the class loader when java.lang.Class is loaded
 233 
 234   static int _klass_offset;
 235   static int _array_klass_offset;
 236 
 237   static int _oop_size_offset;
 238   static int _static_oop_field_count_offset;
 239 
 240   static int _protection_domain_offset;
 241   static int _init_lock_offset;
 242   static int _signers_offset;
 243   static int _class_loader_offset;
 244 
 245   static bool offsets_computed;
 246   static int classRedefinedCount_offset;
 247 
 248   static GrowableArray<Klass*>* _fixup_mirror_list;
 249 
 250   static void set_init_lock(oop java_class, oop init_lock);
 251   static void set_protection_domain(oop java_class, oop protection_domain);
 252   static void set_class_loader(oop java_class, oop class_loader);
 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   static const char* as_external_name(oop java_class);
 275   // Testing
 276   static bool is_instance(oop obj) {
 277     return obj != NULL && obj->klass() == SystemDictionary::Class_klass();
 278   }
 279   static bool is_primitive(oop java_class);
 280   static BasicType primitive_type(oop java_class);
 281   static oop primitive_mirror(BasicType t);
 282   // JVM_NewArray support
 283   static Klass* array_klass(oop java_class);
 284   static void set_array_klass(oop java_class, Klass* klass);
 285   // compiler support for class operations
 286   static int klass_offset_in_bytes()                { return _klass_offset; }
 287   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 288   // Support for classRedefinedCount field
 289   static int classRedefinedCount(oop the_class_mirror);
 290   static void set_classRedefinedCount(oop the_class_mirror, int value);
 291 
 292   // Support for embedded per-class oops
 293   static oop  protection_domain(oop java_class);
 294   static oop  init_lock(oop java_class);
 295   static objArrayOop  signers(oop java_class);
 296   static void set_signers(oop java_class, objArrayOop signers);
 297 
 298   static oop class_loader(oop java_class);
 299 
 300   static int oop_size(oop java_class);
 301   static void set_oop_size(oop java_class, int size);
 302   static int static_oop_field_count(oop java_class);
 303   static void set_static_oop_field_count(oop java_class, int size);
 304 
 305   static GrowableArray<Klass*>* fixup_mirror_list() {
 306     return _fixup_mirror_list;
 307   }
 308   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 309     _fixup_mirror_list = v;
 310   }
 311   // Debugging
 312   friend class JavaClasses;
 313   friend class InstanceKlass;   // verification code accesses offsets
 314   friend class ClassFileParser; // access to number_of_fake_fields
 315 };
 316 
 317 // Interface to java.lang.Thread objects
 318 
 319 class java_lang_Thread : AllStatic {
 320  private:
 321   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 322   // so we compute the offsets at startup rather than hard-wiring them.
 323   static int _name_offset;
 324   static int _group_offset;
 325   static int _contextClassLoader_offset;
 326   static int _inheritedAccessControlContext_offset;
 327   static int _priority_offset;
 328   static int _eetop_offset;
 329   static int _daemon_offset;
 330   static int _stillborn_offset;
 331   static int _stackSize_offset;
 332   static int _tid_offset;
 333   static int _thread_status_offset;
 334   static int _park_blocker_offset;
 335   static int _park_event_offset ;
 336 
 337   static void compute_offsets();
 338 
 339  public:
 340   // Instance creation
 341   static oop create();
 342   // Returns the JavaThread associated with the thread obj
 343   static JavaThread* thread(oop java_thread);
 344   // Set JavaThread for instance
 345   static void set_thread(oop java_thread, JavaThread* thread);
 346   // Name
 347   static oop name(oop java_thread);
 348   static void set_name(oop java_thread, oop name);
 349   // Priority
 350   static ThreadPriority priority(oop java_thread);
 351   static void set_priority(oop java_thread, ThreadPriority priority);
 352   // Thread group
 353   static oop  threadGroup(oop java_thread);
 354   // Stillborn
 355   static bool is_stillborn(oop java_thread);
 356   static void set_stillborn(oop java_thread);
 357   // Alive (NOTE: this is not really a field, but provides the correct
 358   // definition without doing a Java call)
 359   static bool is_alive(oop java_thread);
 360   // Daemon
 361   static bool is_daemon(oop java_thread);
 362   static void set_daemon(oop java_thread);
 363   // Context ClassLoader
 364   static oop context_class_loader(oop java_thread);
 365   // Control context
 366   static oop inherited_access_control_context(oop java_thread);
 367   // Stack size hint
 368   static jlong stackSize(oop java_thread);
 369   // Thread ID
 370   static jlong thread_id(oop java_thread);
 371 
 372   // Blocker object responsible for thread parking
 373   static oop park_blocker(oop java_thread);
 374 
 375   // Pointer to type-stable park handler, encoded as jlong.
 376   // Should be set when apparently null
 377   // For details, see unsafe.cpp Unsafe_Unpark
 378   static jlong park_event(oop java_thread);
 379   static bool set_park_event(oop java_thread, jlong ptr);
 380 
 381   // Java Thread Status for JVMTI and M&M use.
 382   // This thread status info is saved in threadStatus field of
 383   // java.lang.Thread java class.
 384   enum ThreadStatus {
 385     NEW                      = 0,
 386     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 387                                JVMTI_THREAD_STATE_RUNNABLE,
 388     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 389                                JVMTI_THREAD_STATE_WAITING +
 390                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 391                                JVMTI_THREAD_STATE_SLEEPING,
 392     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 393                                JVMTI_THREAD_STATE_WAITING +
 394                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 395                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 396     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 397                                JVMTI_THREAD_STATE_WAITING +
 398                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 399                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 400     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 401                                JVMTI_THREAD_STATE_WAITING +
 402                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 403                                JVMTI_THREAD_STATE_PARKED,
 404     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 405                                JVMTI_THREAD_STATE_WAITING +
 406                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 407                                JVMTI_THREAD_STATE_PARKED,
 408     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 409                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 410     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 411   };
 412   // Write thread status info to threadStatus field of java.lang.Thread.
 413   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 414   // Read thread status info from threadStatus field of java.lang.Thread.
 415   static ThreadStatus get_thread_status(oop java_thread_oop);
 416 
 417   static const char*  thread_status_name(oop java_thread_oop);
 418 
 419   // Debugging
 420   friend class JavaClasses;
 421 };
 422 
 423 // Interface to java.lang.ThreadGroup objects
 424 
 425 class java_lang_ThreadGroup : AllStatic {
 426  private:
 427   static int _parent_offset;
 428   static int _name_offset;
 429   static int _threads_offset;
 430   static int _groups_offset;
 431   static int _maxPriority_offset;
 432   static int _destroyed_offset;
 433   static int _daemon_offset;
 434   static int _vmAllowSuspension_offset;
 435   static int _nthreads_offset;
 436   static int _ngroups_offset;
 437 
 438   static void compute_offsets();
 439 
 440  public:
 441   // parent ThreadGroup
 442   static oop  parent(oop java_thread_group);
 443   // name
 444   static typeArrayOop name(oop java_thread_group);
 445   // ("name as oop" accessor is not necessary)
 446   // Number of threads in group
 447   static int nthreads(oop java_thread_group);
 448   // threads
 449   static objArrayOop threads(oop java_thread_group);
 450   // Number of threads in group
 451   static int ngroups(oop java_thread_group);
 452   // groups
 453   static objArrayOop groups(oop java_thread_group);
 454   // maxPriority in group
 455   static ThreadPriority maxPriority(oop java_thread_group);
 456   // Destroyed
 457   static bool is_destroyed(oop java_thread_group);
 458   // Daemon
 459   static bool is_daemon(oop java_thread_group);
 460   // vmAllowSuspension
 461   static bool is_vmAllowSuspension(oop java_thread_group);
 462   // Debugging
 463   friend class JavaClasses;
 464 };
 465 
 466 
 467 
 468 // Interface to java.lang.Throwable objects
 469 
 470 class java_lang_Throwable: AllStatic {
 471   friend class BacktraceBuilder;
 472 
 473  private:
 474   // Offsets
 475   enum {
 476     hc_backtrace_offset     =  0,
 477     hc_detailMessage_offset =  1,
 478     hc_cause_offset         =  2,  // New since 1.4
 479     hc_stackTrace_offset    =  3   // New since 1.4
 480   };
 481   enum {
 482       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 483   };
 484   // Trace constants
 485   enum {
 486     trace_methods_offset = 0,
 487     trace_bcis_offset    = 1,
 488     trace_mirrors_offset = 2,
 489     trace_cprefs_offset  = 3,
 490     trace_next_offset    = 4,
 491     trace_size           = 5,
 492     trace_chunk_size     = 32
 493   };
 494 
 495   static int backtrace_offset;
 496   static int detailMessage_offset;
 497   static int cause_offset;
 498   static int stackTrace_offset;
 499   static int static_unassigned_stacktrace_offset;
 500 
 501   // Printing
 502   static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
 503   // StackTrace (programmatic access, new since 1.4)
 504   static void clear_stacktrace(oop throwable);
 505   // No stack trace available
 506   static const char* no_stack_trace_message();
 507   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 508   static void set_stacktrace(oop throwable, oop st_element_array);
 509   static oop unassigned_stacktrace();
 510 
 511  public:
 512   // Backtrace
 513   static oop backtrace(oop throwable);
 514   static void set_backtrace(oop throwable, oop value);
 515   // Needed by JVMTI to filter out this internal field.
 516   static int get_backtrace_offset() { return backtrace_offset;}
 517   static int get_detailMessage_offset() { return detailMessage_offset;}
 518   // Message
 519   static oop message(oop throwable);
 520   static oop message(Handle throwable);
 521   static void set_message(oop throwable, oop value);
 522   static Symbol* detail_message(oop throwable);
 523   static void print_stack_element(outputStream *st, Handle mirror, int method,
 524                                   int version, int bci, int cpref);
 525   static void print_stack_element(outputStream *st, methodHandle method, int bci);
 526   static void print_stack_usage(Handle stream);
 527 
 528   // Allocate space for backtrace (created but stack trace not filled in)
 529   static void allocate_backtrace(Handle throwable, TRAPS);
 530   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 531   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 532   // Fill in current stack trace, can cause GC
 533   static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
 534   static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
 535   // Programmatic access to stack trace
 536   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);
 537   static int  get_stack_trace_depth(oop throwable, TRAPS);
 538   // Printing
 539   static void print(oop throwable, outputStream* st);
 540   static void print(Handle throwable, outputStream* st);
 541   static void print_stack_trace(oop throwable, outputStream* st);
 542   // Debugging
 543   friend class JavaClasses;
 544 };
 545 
 546 
 547 // Interface to java.lang.reflect.AccessibleObject objects
 548 
 549 class java_lang_reflect_AccessibleObject: AllStatic {
 550  private:
 551   // Note that to reduce dependencies on the JDK we compute these
 552   // offsets at run-time.
 553   static int override_offset;
 554 
 555   static void compute_offsets();
 556 
 557  public:
 558   // Accessors
 559   static jboolean override(oop reflect);
 560   static void set_override(oop reflect, jboolean value);
 561 
 562   // Debugging
 563   friend class JavaClasses;
 564 };
 565 
 566 
 567 // Interface to java.lang.reflect.Method objects
 568 
 569 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 570  private:
 571   // Note that to reduce dependencies on the JDK we compute these
 572   // offsets at run-time.
 573   static int clazz_offset;
 574   static int name_offset;
 575   static int returnType_offset;
 576   static int parameterTypes_offset;
 577   static int exceptionTypes_offset;
 578   static int slot_offset;
 579   static int modifiers_offset;
 580   static int signature_offset;
 581   static int annotations_offset;
 582   static int parameter_annotations_offset;
 583   static int annotation_default_offset;
 584   static int type_annotations_offset;
 585 
 586   static void compute_offsets();
 587 
 588  public:
 589   // Allocation
 590   static Handle create(TRAPS);
 591 
 592   // Accessors
 593   static oop clazz(oop reflect);
 594   static void set_clazz(oop reflect, oop value);
 595 
 596   static oop name(oop method);
 597   static void set_name(oop method, oop value);
 598 
 599   static oop return_type(oop method);
 600   static void set_return_type(oop method, oop value);
 601 
 602   static oop parameter_types(oop method);
 603   static void set_parameter_types(oop method, oop value);
 604 
 605   static oop exception_types(oop method);
 606   static void set_exception_types(oop method, oop value);
 607 
 608   static int slot(oop reflect);
 609   static void set_slot(oop reflect, int value);
 610 
 611   static int modifiers(oop method);
 612   static void set_modifiers(oop method, int value);
 613 
 614   static bool has_signature_field();
 615   static oop signature(oop method);
 616   static void set_signature(oop method, oop value);
 617 
 618   static bool has_annotations_field();
 619   static oop annotations(oop method);
 620   static void set_annotations(oop method, oop value);
 621 
 622   static bool has_parameter_annotations_field();
 623   static oop parameter_annotations(oop method);
 624   static void set_parameter_annotations(oop method, oop value);
 625 
 626   static bool has_annotation_default_field();
 627   static oop annotation_default(oop method);
 628   static void set_annotation_default(oop method, oop value);
 629 
 630   static bool has_type_annotations_field();
 631   static oop type_annotations(oop method);
 632   static void set_type_annotations(oop method, oop value);
 633 
 634   // Debugging
 635   friend class JavaClasses;
 636 };
 637 
 638 
 639 // Interface to java.lang.reflect.Constructor objects
 640 
 641 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 642  private:
 643   // Note that to reduce dependencies on the JDK we compute these
 644   // offsets at run-time.
 645   static int clazz_offset;
 646   static int parameterTypes_offset;
 647   static int exceptionTypes_offset;
 648   static int slot_offset;
 649   static int modifiers_offset;
 650   static int signature_offset;
 651   static int annotations_offset;
 652   static int parameter_annotations_offset;
 653   static int type_annotations_offset;
 654 
 655   static void compute_offsets();
 656 
 657  public:
 658   // Allocation
 659   static Handle create(TRAPS);
 660 
 661   // Accessors
 662   static oop clazz(oop reflect);
 663   static void set_clazz(oop reflect, oop value);
 664 
 665   static oop parameter_types(oop constructor);
 666   static void set_parameter_types(oop constructor, oop value);
 667 
 668   static oop exception_types(oop constructor);
 669   static void set_exception_types(oop constructor, oop value);
 670 
 671   static int slot(oop reflect);
 672   static void set_slot(oop reflect, int value);
 673 
 674   static int modifiers(oop constructor);
 675   static void set_modifiers(oop constructor, int value);
 676 
 677   static bool has_signature_field();
 678   static oop signature(oop constructor);
 679   static void set_signature(oop constructor, oop value);
 680 
 681   static bool has_annotations_field();
 682   static oop annotations(oop constructor);
 683   static void set_annotations(oop constructor, oop value);
 684 
 685   static bool has_parameter_annotations_field();
 686   static oop parameter_annotations(oop method);
 687   static void set_parameter_annotations(oop method, oop value);
 688 
 689   static bool has_type_annotations_field();
 690   static oop type_annotations(oop constructor);
 691   static void set_type_annotations(oop constructor, oop value);
 692 
 693   // Debugging
 694   friend class JavaClasses;
 695 };
 696 
 697 
 698 // Interface to java.lang.reflect.Field objects
 699 
 700 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 701  private:
 702   // Note that to reduce dependencies on the JDK we compute these
 703   // offsets at run-time.
 704   static int clazz_offset;
 705   static int name_offset;
 706   static int type_offset;
 707   static int slot_offset;
 708   static int modifiers_offset;
 709   static int signature_offset;
 710   static int annotations_offset;
 711   static int type_annotations_offset;
 712 
 713   static void compute_offsets();
 714 
 715  public:
 716   // Allocation
 717   static Handle create(TRAPS);
 718 
 719   // Accessors
 720   static oop clazz(oop reflect);
 721   static void set_clazz(oop reflect, oop value);
 722 
 723   static oop name(oop field);
 724   static void set_name(oop field, oop value);
 725 
 726   static oop type(oop field);
 727   static void set_type(oop field, oop value);
 728 
 729   static int slot(oop reflect);
 730   static void set_slot(oop reflect, int value);
 731 
 732   static int modifiers(oop field);
 733   static void set_modifiers(oop field, int value);
 734 
 735   static bool has_signature_field();
 736   static oop signature(oop constructor);
 737   static void set_signature(oop constructor, oop value);
 738 
 739   static bool has_annotations_field();
 740   static oop annotations(oop constructor);
 741   static void set_annotations(oop constructor, oop value);
 742 
 743   static bool has_parameter_annotations_field();
 744   static oop parameter_annotations(oop method);
 745   static void set_parameter_annotations(oop method, oop value);
 746 
 747   static bool has_annotation_default_field();
 748   static oop annotation_default(oop method);
 749   static void set_annotation_default(oop method, oop value);
 750 
 751   static bool has_type_annotations_field();
 752   static oop type_annotations(oop field);
 753   static void set_type_annotations(oop field, oop value);
 754 
 755   // Debugging
 756   friend class JavaClasses;
 757 };
 758 
 759 class java_lang_reflect_Parameter {
 760  private:
 761   // Note that to reduce dependencies on the JDK we compute these
 762   // offsets at run-time.
 763   static int name_offset;
 764   static int modifiers_offset;
 765   static int index_offset;
 766   static int executable_offset;
 767 
 768   static void compute_offsets();
 769 
 770  public:
 771   // Allocation
 772   static Handle create(TRAPS);
 773 
 774   // Accessors
 775   static oop name(oop field);
 776   static void set_name(oop field, oop value);
 777 
 778   static int index(oop reflect);
 779   static void set_index(oop reflect, int value);
 780 
 781   static int modifiers(oop reflect);
 782   static void set_modifiers(oop reflect, int value);
 783 
 784   static oop executable(oop constructor);
 785   static void set_executable(oop constructor, oop value);
 786 
 787   friend class JavaClasses;
 788 };
 789 
 790 // Interface to sun.reflect.ConstantPool objects
 791 class sun_reflect_ConstantPool {
 792  private:
 793   // Note that to reduce dependencies on the JDK we compute these
 794   // offsets at run-time.
 795   static int _oop_offset;
 796 
 797   static void compute_offsets();
 798 
 799  public:
 800   // Allocation
 801   static Handle create(TRAPS);
 802 
 803   // Accessors
 804   static void set_cp(oop reflect, ConstantPool* value);
 805   static int oop_offset() {
 806     return _oop_offset;
 807   }
 808 
 809   static ConstantPool* get_cp(oop reflect);
 810 
 811   // Debugging
 812   friend class JavaClasses;
 813 };
 814 
 815 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
 816 class sun_reflect_UnsafeStaticFieldAccessorImpl {
 817  private:
 818   static int _base_offset;
 819   static void compute_offsets();
 820 
 821  public:
 822   static int base_offset() {
 823     return _base_offset;
 824   }
 825 
 826   // Debugging
 827   friend class JavaClasses;
 828 };
 829 
 830 // Interface to java.lang primitive type boxing objects:
 831 //  - java.lang.Boolean
 832 //  - java.lang.Character
 833 //  - java.lang.Float
 834 //  - java.lang.Double
 835 //  - java.lang.Byte
 836 //  - java.lang.Short
 837 //  - java.lang.Integer
 838 //  - java.lang.Long
 839 
 840 // This could be separated out into 8 individual classes.
 841 
 842 class java_lang_boxing_object: AllStatic {
 843  private:
 844   enum {
 845    hc_value_offset = 0
 846   };
 847   static int value_offset;
 848   static int long_value_offset;
 849 
 850   static oop initialize_and_allocate(BasicType type, TRAPS);
 851  public:
 852   // Allocation. Returns a boxed value, or NULL for invalid type.
 853   static oop create(BasicType type, jvalue* value, TRAPS);
 854   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 855   static BasicType get_value(oop box, jvalue* value);
 856   static BasicType set_value(oop box, jvalue* value);
 857   static BasicType basic_type(oop box);
 858   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 859   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 860   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 861   static void print(BasicType type, jvalue* value, outputStream* st);
 862 
 863   static int value_offset_in_bytes(BasicType type) {
 864     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 865                                                     value_offset;
 866   }
 867 
 868   // Debugging
 869   friend class JavaClasses;
 870 };
 871 
 872 
 873 
 874 // Interface to java.lang.ref.Reference objects
 875 
 876 class java_lang_ref_Reference: AllStatic {
 877  public:
 878   enum {
 879    hc_referent_offset   = 0,
 880    hc_queue_offset      = 1,
 881    hc_next_offset       = 2,
 882    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 883   };
 884   enum {
 885    hc_static_lock_offset    = 0,
 886    hc_static_pending_offset = 1
 887   };
 888 
 889   static int referent_offset;
 890   static int queue_offset;
 891   static int next_offset;
 892   static int discovered_offset;
 893   static int static_lock_offset;
 894   static int static_pending_offset;
 895   static int number_of_fake_oop_fields;
 896 
 897   // Accessors
 898   static oop referent(oop ref) {
 899     return ref->obj_field(referent_offset);
 900   }
 901   static void set_referent(oop ref, oop value) {
 902     ref->obj_field_put(referent_offset, value);
 903   }
 904   static void set_referent_raw(oop ref, oop value) {
 905     ref->obj_field_put_raw(referent_offset, value);
 906   }
 907   static HeapWord* referent_addr(oop ref) {
 908     return ref->obj_field_addr<HeapWord>(referent_offset);
 909   }
 910   static oop next(oop ref) {
 911     return ref->obj_field(next_offset);
 912   }
 913   static void set_next(oop ref, oop value) {
 914     ref->obj_field_put(next_offset, value);
 915   }
 916   static void set_next_raw(oop ref, oop value) {
 917     ref->obj_field_put_raw(next_offset, value);
 918   }
 919   static HeapWord* next_addr(oop ref) {
 920     return ref->obj_field_addr<HeapWord>(next_offset);
 921   }
 922   static oop discovered(oop ref) {
 923     return ref->obj_field(discovered_offset);
 924   }
 925   static void set_discovered(oop ref, oop value) {
 926     ref->obj_field_put(discovered_offset, value);
 927   }
 928   static void set_discovered_raw(oop ref, oop value) {
 929     ref->obj_field_put_raw(discovered_offset, value);
 930   }
 931   static HeapWord* discovered_addr(oop ref) {
 932     return ref->obj_field_addr<HeapWord>(discovered_offset);
 933   }
 934   static inline oop queue(oop ref) {
 935     return ref->obj_field(queue_offset);
 936   }
 937   static inline void set_queue(oop ref, oop value) {
 938     return ref->obj_field_put(queue_offset, value);
 939   }
 940   // Accessors for statics
 941   static oop  pending_list_lock();
 942   static oop  pending_list();
 943 
 944   static HeapWord*  pending_list_lock_addr();
 945   static HeapWord*  pending_list_addr();
 946 };
 947 
 948 
 949 // Interface to java.lang.ref.SoftReference objects
 950 
 951 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 952  public:
 953   enum {
 954    // The timestamp is a long field and may need to be adjusted for alignment.
 955    hc_timestamp_offset  = hc_discovered_offset + 1
 956   };
 957   enum {
 958    hc_static_clock_offset = 0
 959   };
 960 
 961   static int timestamp_offset;
 962   static int static_clock_offset;
 963 
 964   // Accessors
 965   static jlong timestamp(oop ref);
 966 
 967   // Accessors for statics
 968   static jlong clock();
 969   static void set_clock(jlong value);
 970 };
 971 
 972 
 973 // Interface to java.lang.ref.ReferenceQueue objects
 974 
 975 class java_lang_ref_ReferenceQueue: public AllStatic {
 976 public:
 977   static int static_NULL_queue_offset;
 978   static int static_ENQUEUED_queue_offset;
 979 
 980   // Accessors
 981   static oop NULL_queue();
 982   static oop ENQUEUED_queue();
 983 
 984   static void compute_offsets();
 985 };
 986 
 987 // Interface to java.lang.invoke.MethodHandle objects
 988 
 989 class MethodHandleEntry;
 990 
 991 class java_lang_invoke_MethodHandle: AllStatic {
 992   friend class JavaClasses;
 993 
 994  private:
 995   static int _type_offset;               // the MethodType of this MH
 996   static int _form_offset;               // the LambdaForm of this MH
 997 
 998   static void compute_offsets();
 999 
1000  public:
1001   // Accessors
1002   static oop            type(oop mh);
1003   static void       set_type(oop mh, oop mtype);
1004 
1005   static oop            form(oop mh);
1006   static void       set_form(oop mh, oop lform);
1007 
1008   // Testers
1009   static bool is_subclass(Klass* klass) {
1010     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
1011   }
1012   static bool is_instance(oop obj) {
1013     return obj != NULL && is_subclass(obj->klass());
1014   }
1015 
1016   // Accessors for code generation:
1017   static int type_offset_in_bytes()             { return _type_offset; }
1018   static int form_offset_in_bytes()             { return _form_offset; }
1019 };
1020 
1021 // Interface to java.lang.invoke.DirectMethodHandle objects
1022 
1023 class java_lang_invoke_DirectMethodHandle: AllStatic {
1024   friend class JavaClasses;
1025 
1026  private:
1027   static int _member_offset;               // the MemberName of this DMH
1028 
1029   static void compute_offsets();
1030 
1031  public:
1032   // Accessors
1033   static oop  member(oop mh);
1034 
1035   // Testers
1036   static bool is_subclass(Klass* klass) {
1037     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1038   }
1039   static bool is_instance(oop obj) {
1040     return obj != NULL && is_subclass(obj->klass());
1041   }
1042 
1043   // Accessors for code generation:
1044   static int member_offset_in_bytes()           { return _member_offset; }
1045 };
1046 
1047 // Interface to java.lang.invoke.LambdaForm objects
1048 // (These are a private interface for managing adapter code generation.)
1049 
1050 class java_lang_invoke_LambdaForm: AllStatic {
1051   friend class JavaClasses;
1052 
1053  private:
1054   static int _vmentry_offset;  // type is MemberName
1055 
1056   static void compute_offsets();
1057 
1058  public:
1059   // Accessors
1060   static oop            vmentry(oop lform);
1061   static void       set_vmentry(oop lform, oop invoker);
1062 
1063   // Testers
1064   static bool is_subclass(Klass* klass) {
1065     return SystemDictionary::LambdaForm_klass() != NULL &&
1066       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1067   }
1068   static bool is_instance(oop obj) {
1069     return obj != NULL && is_subclass(obj->klass());
1070   }
1071 
1072   // Accessors for code generation:
1073   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1074 };
1075 
1076 
1077 // Interface to java.lang.invoke.MemberName objects
1078 // (These are a private interface for Java code to query the class hierarchy.)
1079 
1080 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1081   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1082   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1083   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1084 
1085 class java_lang_invoke_MemberName: AllStatic {
1086   friend class JavaClasses;
1087 
1088  private:
1089   // From java.lang.invoke.MemberName:
1090   //    private Class<?>   clazz;       // class in which the method is defined
1091   //    private String     name;        // may be null if not yet materialized
1092   //    private Object     type;        // may be null if not yet materialized
1093   //    private int        flags;       // modifier bits; see reflect.Modifier
1094   //    private intptr     vmtarget;    // VM-specific target value
1095   //    private intptr_t   vmindex;     // member index within class or interface
1096   static int _clazz_offset;
1097   static int _name_offset;
1098   static int _type_offset;
1099   static int _flags_offset;
1100   static int _vmtarget_offset;
1101   static int _vmloader_offset;
1102   static int _vmindex_offset;
1103 
1104   static void compute_offsets();
1105 
1106  public:
1107   // Accessors
1108   static oop            clazz(oop mname);
1109   static void       set_clazz(oop mname, oop clazz);
1110 
1111   static oop            type(oop mname);
1112   static void       set_type(oop mname, oop type);
1113 
1114   static oop            name(oop mname);
1115   static void       set_name(oop mname, oop name);
1116 
1117   static int            flags(oop mname);
1118   static void       set_flags(oop mname, int flags);
1119 
1120   static Metadata*      vmtarget(oop mname);
1121   static void       set_vmtarget(oop mname, Metadata* target);
1122 
1123   static intptr_t       vmindex(oop mname);
1124   static void       set_vmindex(oop mname, intptr_t index);
1125 
1126   // Testers
1127   static bool is_subclass(Klass* klass) {
1128     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1129   }
1130   static bool is_instance(oop obj) {
1131     return obj != NULL && is_subclass(obj->klass());
1132   }
1133 
1134   static bool is_method(oop obj);
1135 
1136   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1137   enum {
1138     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1139     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1140     MN_IS_FIELD             = 0x00040000, // field
1141     MN_IS_TYPE              = 0x00080000, // nested type
1142     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1143     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1144     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1145     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1146     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1147     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1148   };
1149 
1150   // Accessors for code generation:
1151   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1152   static int type_offset_in_bytes()             { return _type_offset; }
1153   static int name_offset_in_bytes()             { return _name_offset; }
1154   static int flags_offset_in_bytes()            { return _flags_offset; }
1155   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1156   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1157 
1158   static bool equals(oop mt1, oop mt2);
1159 };
1160 
1161 
1162 // Interface to java.lang.invoke.MethodType objects
1163 
1164 class java_lang_invoke_MethodType: AllStatic {
1165   friend class JavaClasses;
1166 
1167  private:
1168   static int _rtype_offset;
1169   static int _ptypes_offset;
1170 
1171   static void compute_offsets();
1172 
1173  public:
1174   // Accessors
1175   static oop            rtype(oop mt);
1176   static objArrayOop    ptypes(oop mt);
1177 
1178   static oop            ptype(oop mt, int index);
1179   static int            ptype_count(oop mt);
1180 
1181   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1182   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1183 
1184   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1185   static void           print_signature(oop mt, outputStream* st);
1186 
1187   static bool is_instance(oop obj) {
1188     return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1189   }
1190 
1191   static bool equals(oop mt1, oop mt2);
1192 
1193   // Accessors for code generation:
1194   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1195   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1196 };
1197 
1198 
1199 // Interface to java.lang.invoke.CallSite objects
1200 
1201 class java_lang_invoke_CallSite: AllStatic {
1202   friend class JavaClasses;
1203 
1204 private:
1205   static int _target_offset;
1206 
1207   static void compute_offsets();
1208 
1209 public:
1210   // Accessors
1211   static oop              target(         oop site)             { return site->obj_field(             _target_offset);         }
1212   static void         set_target(         oop site, oop target) {        site->obj_field_put(         _target_offset, target); }
1213 
1214   static volatile oop     target_volatile(oop site)             { return oop((oopDesc *)(site->obj_field_volatile(_target_offset))); }
1215   static void         set_target_volatile(oop site, oop target) {        site->obj_field_put_volatile(_target_offset, target); }
1216 
1217   // Testers
1218   static bool is_subclass(Klass* klass) {
1219     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1220   }
1221   static bool is_instance(oop obj) {
1222     return obj != NULL && is_subclass(obj->klass());
1223   }
1224 
1225   // Accessors for code generation:
1226   static int target_offset_in_bytes()           { return _target_offset; }
1227 };
1228 
1229 
1230 // Interface to java.security.AccessControlContext objects
1231 
1232 class java_security_AccessControlContext: AllStatic {
1233  private:
1234   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1235   // so we compute the offsets at startup rather than hard-wiring them.
1236   static int _context_offset;
1237   static int _privilegedContext_offset;
1238   static int _isPrivileged_offset;
1239   static int _isAuthorized_offset;
1240 
1241   static void compute_offsets();
1242  public:
1243   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1244 
1245   static bool is_authorized(Handle context);
1246 
1247   // Debugging/initialization
1248   friend class JavaClasses;
1249 };
1250 
1251 
1252 // Interface to java.lang.ClassLoader objects
1253 
1254 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1255   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1256 
1257 class java_lang_ClassLoader : AllStatic {
1258  private:
1259   // The fake offsets are added by the class loader when java.lang.Class is loaded
1260   enum {
1261    hc_parent_offset = 0
1262   };
1263   static int _loader_data_offset;
1264   static bool offsets_computed;
1265   static int parent_offset;
1266   static int parallelCapable_offset;
1267 
1268  public:
1269   static void compute_offsets();
1270 
1271   static ClassLoaderData** loader_data_addr(oop loader);
1272   static ClassLoaderData* loader_data(oop loader);
1273 
1274   static oop parent(oop loader);
1275   static bool isAncestor(oop loader, oop cl);
1276 
1277   // Support for parallelCapable field
1278   static bool parallelCapable(oop the_class_mirror);
1279 
1280   static bool is_trusted_loader(oop loader);
1281 
1282   // Fix for 4474172
1283   static oop  non_reflection_class_loader(oop loader);
1284 
1285   // Testers
1286   static bool is_subclass(Klass* klass) {
1287     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1288   }
1289   static bool is_instance(oop obj) {
1290     return obj != NULL && is_subclass(obj->klass());
1291   }
1292 
1293   // Debugging
1294   friend class JavaClasses;
1295   friend class ClassFileParser; // access to number_of_fake_fields
1296 };
1297 
1298 
1299 // Interface to java.lang.System objects
1300 
1301 class java_lang_System : AllStatic {
1302  private:
1303   enum {
1304    hc_static_in_offset  = 0,
1305    hc_static_out_offset = 1,
1306    hc_static_err_offset = 2,
1307    hc_static_security_offset = 3
1308   };
1309 
1310   static int  static_in_offset;
1311   static int static_out_offset;
1312   static int static_err_offset;
1313   static int static_security_offset;
1314 
1315  public:
1316   static int  in_offset_in_bytes();
1317   static int out_offset_in_bytes();
1318   static int err_offset_in_bytes();
1319 
1320   static bool has_security_manager();
1321 
1322   // Debugging
1323   friend class JavaClasses;
1324 };
1325 
1326 
1327 // Interface to java.lang.StackTraceElement objects
1328 
1329 class java_lang_StackTraceElement: AllStatic {
1330  private:
1331   enum {
1332     hc_declaringClass_offset  = 0,
1333     hc_methodName_offset = 1,
1334     hc_fileName_offset   = 2,
1335     hc_lineNumber_offset = 3
1336   };
1337 
1338   static int declaringClass_offset;
1339   static int methodName_offset;
1340   static int fileName_offset;
1341   static int lineNumber_offset;
1342 
1343  public:
1344   // Setters
1345   static void set_declaringClass(oop element, oop value);
1346   static void set_methodName(oop element, oop value);
1347   static void set_fileName(oop element, oop value);
1348   static void set_lineNumber(oop element, int value);
1349 
1350   // Create an instance of StackTraceElement
1351   static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1352   static oop create(methodHandle method, int bci, TRAPS);
1353 
1354   // Debugging
1355   friend class JavaClasses;
1356 };
1357 
1358 
1359 // Interface to java.lang.AssertionStatusDirectives objects
1360 
1361 class java_lang_AssertionStatusDirectives: AllStatic {
1362  private:
1363   enum {
1364     hc_classes_offset,
1365     hc_classEnabled_offset,
1366     hc_packages_offset,
1367     hc_packageEnabled_offset,
1368     hc_deflt_offset
1369   };
1370 
1371   static int classes_offset;
1372   static int classEnabled_offset;
1373   static int packages_offset;
1374   static int packageEnabled_offset;
1375   static int deflt_offset;
1376 
1377  public:
1378   // Setters
1379   static void set_classes(oop obj, oop val);
1380   static void set_classEnabled(oop obj, oop val);
1381   static void set_packages(oop obj, oop val);
1382   static void set_packageEnabled(oop obj, oop val);
1383   static void set_deflt(oop obj, bool val);
1384   // Debugging
1385   friend class JavaClasses;
1386 };
1387 
1388 
1389 class java_nio_Buffer: AllStatic {
1390  private:
1391   static int _limit_offset;
1392 
1393  public:
1394   static int  limit_offset();
1395   static void compute_offsets();
1396 };
1397 
1398 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1399  private:
1400   static int  _owner_offset;
1401  public:
1402   static void initialize(TRAPS);
1403   static oop  get_owner_threadObj(oop obj);
1404 };
1405 
1406 // Use to declare fields that need to be injected into Java classes
1407 // for the JVM to use.  The name_index and signature_index are
1408 // declared in vmSymbols.  The may_be_java flag is used to declare
1409 // fields that might already exist in Java but should be injected if
1410 // they don't.  Otherwise the field is unconditionally injected and
1411 // the JVM uses the injected one.  This is to ensure that name
1412 // collisions don't occur.  In general may_be_java should be false
1413 // unless there's a good reason.
1414 
1415 class InjectedField {
1416  public:
1417   const SystemDictionary::WKID klass_id;
1418   const vmSymbols::SID name_index;
1419   const vmSymbols::SID signature_index;
1420   const bool           may_be_java;
1421 
1422 
1423   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1424   Symbol* name() const      { return lookup_symbol(name_index); }
1425   Symbol* signature() const { return lookup_symbol(signature_index); }
1426 
1427   int compute_offset();
1428 
1429   // Find the Symbol for this index
1430   static Symbol* lookup_symbol(int symbol_index) {
1431     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1432   }
1433 };
1434 
1435 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1436   klass##_##name##_enum,
1437 
1438 #define ALL_INJECTED_FIELDS(macro)          \
1439   CLASS_INJECTED_FIELDS(macro)              \
1440   CLASSLOADER_INJECTED_FIELDS(macro)        \
1441   MEMBERNAME_INJECTED_FIELDS(macro)
1442 
1443 // Interface to hard-coded offset checking
1444 
1445 class JavaClasses : AllStatic {
1446  private:
1447 
1448   static InjectedField _injected_fields[];
1449 
1450   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1451   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1452   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1453 
1454  public:
1455   enum InjectedFieldID {
1456     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1457     MAX_enum
1458   };
1459 
1460   static int compute_injected_offset(InjectedFieldID id);
1461 
1462   static void compute_hard_coded_offsets();
1463   static void compute_offsets();
1464   static void check_offsets() PRODUCT_RETURN;
1465 
1466   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1467 };
1468 
1469 #undef DECLARE_INJECTED_FIELD_ENUM
1470 
1471 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP