1 /*
   2  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int offset_offset;
  57   static int count_offset;
  58   static int hash_offset;
  59 
  60   static bool initialized;
  61 
  62   static Handle basic_create(int length, TRAPS);
  63 
  64   static void set_offset(oop string, int offset) {
  65     assert(initialized, "Must be initialized");
  66     if (offset_offset > 0) {
  67       string->int_field_put(offset_offset, offset);
  68     }
  69   }
  70   static void set_count( oop string, int count) {
  71     assert(initialized, "Must be initialized");
  72     if (count_offset > 0) {
  73       string->int_field_put(count_offset,  count);
  74     }
  75   }
  76 
  77  public:
  78   static void compute_offsets();
  79 
  80   // Instance creation
  81   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  82   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  83   static Handle create_from_str(const char* utf8_str, TRAPS);
  84   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  85   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  86   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  87   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  88 
  89   static bool has_offset_field()  {
  90     assert(initialized, "Must be initialized");
  91     return (offset_offset > 0);
  92   }
  93 
  94   static bool has_count_field()  {
  95     assert(initialized, "Must be initialized");
  96     return (count_offset > 0);
  97   }
  98 
  99   static bool has_hash_field()  {
 100     assert(initialized, "Must be initialized");
 101     return (hash_offset > 0);
 102   }
 103 
 104   static int value_offset_in_bytes()  {
 105     assert(initialized && (value_offset > 0), "Must be initialized");
 106     return value_offset;
 107   }
 108   static int count_offset_in_bytes()  {
 109     assert(initialized && (count_offset > 0), "Must be initialized");
 110     return count_offset;
 111   }
 112   static int offset_offset_in_bytes() {
 113     assert(initialized && (offset_offset > 0), "Must be initialized");
 114     return offset_offset;
 115   }
 116   static int hash_offset_in_bytes()   {
 117     assert(initialized && (hash_offset > 0), "Must be initialized");
 118     return hash_offset;
 119   }
 120 
 121   static void set_value_raw(oop string, typeArrayOop buffer) {
 122     assert(initialized, "Must be initialized");
 123     string->obj_field_put_raw(value_offset, buffer);
 124   }
 125   static void set_value(oop string, typeArrayOop buffer) {
 126     assert(initialized && (value_offset > 0), "Must be initialized");
 127     string->obj_field_put(value_offset, (oop)buffer);
 128   }
 129   static void set_hash(oop string, unsigned int hash) {
 130     assert(initialized && (hash_offset > 0), "Must be initialized");
 131     string->int_field_put(hash_offset, hash);
 132   }
 133 
 134   // Accessors
 135   static typeArrayOop value(oop java_string) {
 136     assert(initialized && (value_offset > 0), "Must be initialized");
 137     assert(is_instance(java_string), "must be java_string");
 138     return (typeArrayOop) java_string->obj_field(value_offset);
 139   }
 140   static unsigned int hash(oop java_string) {
 141     assert(initialized && (hash_offset > 0), "Must be initialized");
 142     assert(is_instance(java_string), "must be java_string");
 143     return java_string->int_field(hash_offset);
 144   }
 145   static int offset(oop java_string) {
 146     assert(initialized, "Must be initialized");
 147     assert(is_instance(java_string), "must be java_string");
 148     if (offset_offset > 0) {
 149       return java_string->int_field(offset_offset);
 150     } else {
 151       return 0;
 152     }
 153   }
 154   static int length(oop java_string) {
 155     assert(initialized, "Must be initialized");
 156     assert(is_instance(java_string), "must be java_string");
 157     if (count_offset > 0) {
 158       return java_string->int_field(count_offset);
 159     } else {
 160       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
 161     }
 162   }
 163   static int utf8_length(oop java_string);
 164 
 165   // String converters
 166   static char*  as_utf8_string(oop java_string);
 167   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 168   static char*  as_utf8_string(oop java_string, int start, int len);
 169   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 170   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 171   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 172   // produce an ascii string with all other values quoted using \u####
 173   static char*  as_quoted_ascii(oop java_string);
 174 
 175   // Compute the hash value for a java.lang.String object which would
 176   // contain the characters passed in.
 177   //
 178   // As the hash value used by the String object itself, in
 179   // String.hashCode().  This value is normally calculated in Java code
 180   // in the String.hashCode method(), but is precomputed for String
 181   // objects in the shared archive file.
 182   // hash P(31) from Kernighan & Ritchie
 183   //
 184   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 185   template <typename T> static unsigned int hash_code(T* s, int len) {
 186     unsigned int h = 0;
 187     while (len-- > 0) {
 188       h = 31*h + (unsigned int) *s;
 189       s++;
 190     }
 191     return h;
 192   }
 193   static unsigned int hash_code(oop java_string);
 194 
 195   // This is the string hash code used by the StringTable, which may be
 196   // the same as String.hashCode or an alternate hash code.
 197   static unsigned int hash_string(oop java_string);
 198 
 199   static bool equals(oop java_string, jchar* chars, int len);
 200   static bool equals(oop str1, oop str2);
 201 
 202   // Conversion between '.' and '/' formats
 203   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 204   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 205 
 206   // Conversion
 207   static Symbol* as_symbol(Handle java_string, TRAPS);
 208   static Symbol* as_symbol_or_null(oop java_string);
 209 
 210   // Testers
 211   static bool is_instance(oop obj);
 212   static bool is_instance_inlined(oop obj);
 213 
 214   // Debugging
 215   static void print(oop java_string, outputStream* st);
 216   friend class JavaClasses;
 217   friend class StringTable;
 218 };
 219 
 220 
 221 // Interface to java.lang.Class objects
 222 
 223 #define CLASS_INJECTED_FIELDS(macro)                                       \
 224   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 225   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 226   macro(java_lang_Class, oop_size,               int_signature,     false) \
 227   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 228   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 229   macro(java_lang_Class, signers,                object_signature,  false)
 230 
 231 class java_lang_Class : AllStatic {
 232   friend class VMStructs;
 233 
 234  private:
 235   // The fake offsets are added by the class loader when java.lang.Class is loaded
 236 
 237   static int _klass_offset;
 238   static int _array_klass_offset;
 239 
 240   static int _oop_size_offset;
 241   static int _static_oop_field_count_offset;
 242 
 243   static int _protection_domain_offset;
 244   static int _init_lock_offset;
 245   static int _signers_offset;
 246   static int _class_loader_offset;
 247   static int _component_mirror_offset;
 248 
 249   static bool offsets_computed;
 250   static int classRedefinedCount_offset;
 251 
 252   static GrowableArray<Klass*>* _fixup_mirror_list;
 253 
 254   static void set_init_lock(oop java_class, oop init_lock);
 255   static void set_protection_domain(oop java_class, oop protection_domain);
 256   static void set_class_loader(oop java_class, oop class_loader);
 257   static void set_component_mirror(oop java_class, oop comp_mirror);
 258   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 259  public:
 260   static void compute_offsets();
 261 
 262   // Instance creation
 263   static void create_mirror(KlassHandle k, Handle class_loader,
 264                             Handle protection_domain, TRAPS);
 265   static void fixup_mirror(KlassHandle k, TRAPS);
 266   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 267   // Conversion
 268   static Klass* as_Klass(oop java_class);
 269   static void set_klass(oop java_class, Klass* klass);
 270   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 271   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 272     Klass* refk_oop = NULL;
 273     BasicType result = as_BasicType(java_class, &refk_oop);
 274     (*reference_klass) = KlassHandle(refk_oop);
 275     return result;
 276   }
 277   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 278   static void print_signature(oop java_class, outputStream *st);
 279   // Testing
 280   static bool is_instance(oop obj);
 281 
 282   static bool is_primitive(oop java_class);
 283   static BasicType primitive_type(oop java_class);
 284   static oop primitive_mirror(BasicType t);
 285   // JVM_NewArray support
 286   static Klass* array_klass(oop java_class);
 287   static void set_array_klass(oop java_class, Klass* klass);
 288   // compiler support for class operations
 289   static int klass_offset_in_bytes()                { return _klass_offset; }
 290   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 291   // Support for classRedefinedCount field
 292   static int classRedefinedCount(oop the_class_mirror);
 293   static void set_classRedefinedCount(oop the_class_mirror, int value);
 294 
 295   // Support for embedded per-class oops
 296   static oop  protection_domain(oop java_class);
 297   static oop  init_lock(oop java_class);
 298   static oop  component_mirror(oop java_class);
 299   static objArrayOop  signers(oop java_class);
 300   static void set_signers(oop java_class, objArrayOop signers);
 301 
 302   static oop class_loader(oop java_class);
 303 
 304   static int oop_size(oop java_class);
 305   static void set_oop_size(oop java_class, int size);
 306   static int static_oop_field_count(oop java_class);
 307   static void set_static_oop_field_count(oop java_class, int size);
 308 
 309   static GrowableArray<Klass*>* fixup_mirror_list() {
 310     return _fixup_mirror_list;
 311   }
 312   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 313     _fixup_mirror_list = v;
 314   }
 315   // Debugging
 316   friend class JavaClasses;
 317   friend class InstanceKlass;   // verification code accesses offsets
 318   friend class ClassFileParser; // access to number_of_fake_fields
 319 };
 320 
 321 // Interface to java.lang.Thread objects
 322 
 323 class java_lang_Thread : AllStatic {
 324  private:
 325   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 326   // so we compute the offsets at startup rather than hard-wiring them.
 327   static int _name_offset;
 328   static int _group_offset;
 329   static int _contextClassLoader_offset;
 330   static int _inheritedAccessControlContext_offset;
 331   static int _priority_offset;
 332   static int _eetop_offset;
 333   static int _daemon_offset;
 334   static int _stillborn_offset;
 335   static int _stackSize_offset;
 336   static int _tid_offset;
 337   static int _thread_status_offset;
 338   static int _park_blocker_offset;
 339   static int _park_event_offset ;
 340 
 341   static void compute_offsets();
 342 
 343  public:
 344   // Instance creation
 345   static oop create();
 346   // Returns the JavaThread associated with the thread obj
 347   static JavaThread* thread(oop java_thread);
 348   // Set JavaThread for instance
 349   static void set_thread(oop java_thread, JavaThread* thread);
 350   // Name
 351   static oop name(oop java_thread);
 352   static void set_name(oop java_thread, oop name);
 353   // Priority
 354   static ThreadPriority priority(oop java_thread);
 355   static void set_priority(oop java_thread, ThreadPriority priority);
 356   // Thread group
 357   static oop  threadGroup(oop java_thread);
 358   // Stillborn
 359   static bool is_stillborn(oop java_thread);
 360   static void set_stillborn(oop java_thread);
 361   // Alive (NOTE: this is not really a field, but provides the correct
 362   // definition without doing a Java call)
 363   static bool is_alive(oop java_thread);
 364   // Daemon
 365   static bool is_daemon(oop java_thread);
 366   static void set_daemon(oop java_thread);
 367   // Context ClassLoader
 368   static oop context_class_loader(oop java_thread);
 369   // Control context
 370   static oop inherited_access_control_context(oop java_thread);
 371   // Stack size hint
 372   static jlong stackSize(oop java_thread);
 373   // Thread ID
 374   static jlong thread_id(oop java_thread);
 375 
 376   // Blocker object responsible for thread parking
 377   static oop park_blocker(oop java_thread);
 378 
 379   // Pointer to type-stable park handler, encoded as jlong.
 380   // Should be set when apparently null
 381   // For details, see unsafe.cpp Unsafe_Unpark
 382   static jlong park_event(oop java_thread);
 383   static bool set_park_event(oop java_thread, jlong ptr);
 384 
 385   // Java Thread Status for JVMTI and M&M use.
 386   // This thread status info is saved in threadStatus field of
 387   // java.lang.Thread java class.
 388   enum ThreadStatus {
 389     NEW                      = 0,
 390     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 391                                JVMTI_THREAD_STATE_RUNNABLE,
 392     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 393                                JVMTI_THREAD_STATE_WAITING +
 394                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 395                                JVMTI_THREAD_STATE_SLEEPING,
 396     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 397                                JVMTI_THREAD_STATE_WAITING +
 398                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 399                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 400     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 401                                JVMTI_THREAD_STATE_WAITING +
 402                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 403                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 404     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 405                                JVMTI_THREAD_STATE_WAITING +
 406                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 407                                JVMTI_THREAD_STATE_PARKED,
 408     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 409                                JVMTI_THREAD_STATE_WAITING +
 410                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 411                                JVMTI_THREAD_STATE_PARKED,
 412     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 413                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 414     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 415   };
 416   // Write thread status info to threadStatus field of java.lang.Thread.
 417   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 418   // Read thread status info from threadStatus field of java.lang.Thread.
 419   static ThreadStatus get_thread_status(oop java_thread_oop);
 420 
 421   static const char*  thread_status_name(oop java_thread_oop);
 422 
 423   // Debugging
 424   friend class JavaClasses;
 425 };
 426 
 427 // Interface to java.lang.ThreadGroup objects
 428 
 429 class java_lang_ThreadGroup : AllStatic {
 430  private:
 431   static int _parent_offset;
 432   static int _name_offset;
 433   static int _threads_offset;
 434   static int _groups_offset;
 435   static int _maxPriority_offset;
 436   static int _destroyed_offset;
 437   static int _daemon_offset;
 438   static int _vmAllowSuspension_offset;
 439   static int _nthreads_offset;
 440   static int _ngroups_offset;
 441 
 442   static void compute_offsets();
 443 
 444  public:
 445   // parent ThreadGroup
 446   static oop  parent(oop java_thread_group);
 447   // name
 448   static typeArrayOop name(oop java_thread_group);
 449   // ("name as oop" accessor is not necessary)
 450   // Number of threads in group
 451   static int nthreads(oop java_thread_group);
 452   // threads
 453   static objArrayOop threads(oop java_thread_group);
 454   // Number of threads in group
 455   static int ngroups(oop java_thread_group);
 456   // groups
 457   static objArrayOop groups(oop java_thread_group);
 458   // maxPriority in group
 459   static ThreadPriority maxPriority(oop java_thread_group);
 460   // Destroyed
 461   static bool is_destroyed(oop java_thread_group);
 462   // Daemon
 463   static bool is_daemon(oop java_thread_group);
 464   // vmAllowSuspension
 465   static bool is_vmAllowSuspension(oop java_thread_group);
 466   // Debugging
 467   friend class JavaClasses;
 468 };
 469 
 470 
 471 
 472 // Interface to java.lang.Throwable objects
 473 
 474 class java_lang_Throwable: AllStatic {
 475   friend class BacktraceBuilder;
 476 
 477  private:
 478   // Offsets
 479   enum {
 480     hc_backtrace_offset     =  0,
 481     hc_detailMessage_offset =  1,
 482     hc_cause_offset         =  2,  // New since 1.4
 483     hc_stackTrace_offset    =  3   // New since 1.4
 484   };
 485   enum {
 486       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 487   };
 488   // Trace constants
 489   enum {
 490     trace_methods_offset = 0,
 491     trace_bcis_offset    = 1,
 492     trace_mirrors_offset = 2,
 493     trace_cprefs_offset  = 3,
 494     trace_next_offset    = 4,
 495     trace_size           = 5,
 496     trace_chunk_size     = 32
 497   };
 498 
 499   static int backtrace_offset;
 500   static int detailMessage_offset;
 501   static int cause_offset;
 502   static int stackTrace_offset;
 503   static int static_unassigned_stacktrace_offset;
 504 
 505   // Printing
 506   static char* print_stack_element_to_buffer(Handle mirror, int method, int version, int bci, int cpref);
 507   // StackTrace (programmatic access, new since 1.4)
 508   static void clear_stacktrace(oop throwable);
 509   // No stack trace available
 510   static const char* no_stack_trace_message();
 511   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 512   static void set_stacktrace(oop throwable, oop st_element_array);
 513   static oop unassigned_stacktrace();
 514 
 515  public:
 516   // Backtrace
 517   static oop backtrace(oop throwable);
 518   static void set_backtrace(oop throwable, oop value);
 519   // Needed by JVMTI to filter out this internal field.
 520   static int get_backtrace_offset() { return backtrace_offset;}
 521   static int get_detailMessage_offset() { return detailMessage_offset;}
 522   // Message
 523   static oop message(oop throwable);
 524   static oop message(Handle throwable);
 525   static void set_message(oop throwable, oop value);
 526   static Symbol* detail_message(oop throwable);
 527   static void print_stack_element(outputStream *st, Handle mirror, int method,
 528                                   int version, int bci, int cpref);
 529   static void print_stack_element(outputStream *st, methodHandle method, int bci);
 530   static void print_stack_usage(Handle stream);
 531 
 532   // Allocate space for backtrace (created but stack trace not filled in)
 533   static void allocate_backtrace(Handle throwable, TRAPS);
 534   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 535   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 536   // Fill in current stack trace, can cause GC
 537   static void fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS);
 538   static void fill_in_stack_trace(Handle throwable, methodHandle method = methodHandle());
 539   // Programmatic access to stack trace
 540   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);
 541   static int  get_stack_trace_depth(oop throwable, TRAPS);
 542   // Printing
 543   static void print(oop throwable, outputStream* st);
 544   static void print(Handle throwable, outputStream* st);
 545   static void print_stack_trace(oop throwable, outputStream* st);
 546   // Debugging
 547   friend class JavaClasses;
 548 };
 549 
 550 
 551 // Interface to java.lang.reflect.AccessibleObject objects
 552 
 553 class java_lang_reflect_AccessibleObject: AllStatic {
 554  private:
 555   // Note that to reduce dependencies on the JDK we compute these
 556   // offsets at run-time.
 557   static int override_offset;
 558 
 559   static void compute_offsets();
 560 
 561  public:
 562   // Accessors
 563   static jboolean override(oop reflect);
 564   static void set_override(oop reflect, jboolean value);
 565 
 566   // Debugging
 567   friend class JavaClasses;
 568 };
 569 
 570 
 571 // Interface to java.lang.reflect.Method objects
 572 
 573 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 574  private:
 575   // Note that to reduce dependencies on the JDK we compute these
 576   // offsets at run-time.
 577   static int clazz_offset;
 578   static int name_offset;
 579   static int returnType_offset;
 580   static int parameterTypes_offset;
 581   static int exceptionTypes_offset;
 582   static int slot_offset;
 583   static int modifiers_offset;
 584   static int signature_offset;
 585   static int annotations_offset;
 586   static int parameter_annotations_offset;
 587   static int annotation_default_offset;
 588   static int type_annotations_offset;
 589 
 590   static void compute_offsets();
 591 
 592  public:
 593   // Allocation
 594   static Handle create(TRAPS);
 595 
 596   // Accessors
 597   static oop clazz(oop reflect);
 598   static void set_clazz(oop reflect, oop value);
 599 
 600   static oop name(oop method);
 601   static void set_name(oop method, oop value);
 602 
 603   static oop return_type(oop method);
 604   static void set_return_type(oop method, oop value);
 605 
 606   static oop parameter_types(oop method);
 607   static void set_parameter_types(oop method, oop value);
 608 
 609   static oop exception_types(oop method);
 610   static void set_exception_types(oop method, oop value);
 611 
 612   static int slot(oop reflect);
 613   static void set_slot(oop reflect, int value);
 614 
 615   static int modifiers(oop method);
 616   static void set_modifiers(oop method, int value);
 617 
 618   static bool has_signature_field();
 619   static oop signature(oop method);
 620   static void set_signature(oop method, oop value);
 621 
 622   static bool has_annotations_field();
 623   static oop annotations(oop method);
 624   static void set_annotations(oop method, oop value);
 625 
 626   static bool has_parameter_annotations_field();
 627   static oop parameter_annotations(oop method);
 628   static void set_parameter_annotations(oop method, oop value);
 629 
 630   static bool has_annotation_default_field();
 631   static oop annotation_default(oop method);
 632   static void set_annotation_default(oop method, oop value);
 633 
 634   static bool has_type_annotations_field();
 635   static oop type_annotations(oop method);
 636   static void set_type_annotations(oop method, oop value);
 637 
 638   // Debugging
 639   friend class JavaClasses;
 640 };
 641 
 642 
 643 // Interface to java.lang.reflect.Constructor objects
 644 
 645 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 646  private:
 647   // Note that to reduce dependencies on the JDK we compute these
 648   // offsets at run-time.
 649   static int clazz_offset;
 650   static int parameterTypes_offset;
 651   static int exceptionTypes_offset;
 652   static int slot_offset;
 653   static int modifiers_offset;
 654   static int signature_offset;
 655   static int annotations_offset;
 656   static int parameter_annotations_offset;
 657   static int type_annotations_offset;
 658 
 659   static void compute_offsets();
 660 
 661  public:
 662   // Allocation
 663   static Handle create(TRAPS);
 664 
 665   // Accessors
 666   static oop clazz(oop reflect);
 667   static void set_clazz(oop reflect, oop value);
 668 
 669   static oop parameter_types(oop constructor);
 670   static void set_parameter_types(oop constructor, oop value);
 671 
 672   static oop exception_types(oop constructor);
 673   static void set_exception_types(oop constructor, oop value);
 674 
 675   static int slot(oop reflect);
 676   static void set_slot(oop reflect, int value);
 677 
 678   static int modifiers(oop constructor);
 679   static void set_modifiers(oop constructor, int value);
 680 
 681   static bool has_signature_field();
 682   static oop signature(oop constructor);
 683   static void set_signature(oop constructor, oop value);
 684 
 685   static bool has_annotations_field();
 686   static oop annotations(oop constructor);
 687   static void set_annotations(oop constructor, oop value);
 688 
 689   static bool has_parameter_annotations_field();
 690   static oop parameter_annotations(oop method);
 691   static void set_parameter_annotations(oop method, oop value);
 692 
 693   static bool has_type_annotations_field();
 694   static oop type_annotations(oop constructor);
 695   static void set_type_annotations(oop constructor, oop value);
 696 
 697   // Debugging
 698   friend class JavaClasses;
 699 };
 700 
 701 
 702 // Interface to java.lang.reflect.Field objects
 703 
 704 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 705  private:
 706   // Note that to reduce dependencies on the JDK we compute these
 707   // offsets at run-time.
 708   static int clazz_offset;
 709   static int name_offset;
 710   static int type_offset;
 711   static int slot_offset;
 712   static int modifiers_offset;
 713   static int signature_offset;
 714   static int annotations_offset;
 715   static int type_annotations_offset;
 716 
 717   static void compute_offsets();
 718 
 719  public:
 720   // Allocation
 721   static Handle create(TRAPS);
 722 
 723   // Accessors
 724   static oop clazz(oop reflect);
 725   static void set_clazz(oop reflect, oop value);
 726 
 727   static oop name(oop field);
 728   static void set_name(oop field, oop value);
 729 
 730   static oop type(oop field);
 731   static void set_type(oop field, oop value);
 732 
 733   static int slot(oop reflect);
 734   static void set_slot(oop reflect, int value);
 735 
 736   static int modifiers(oop field);
 737   static void set_modifiers(oop field, int value);
 738 
 739   static bool has_signature_field();
 740   static oop signature(oop constructor);
 741   static void set_signature(oop constructor, oop value);
 742 
 743   static bool has_annotations_field();
 744   static oop annotations(oop constructor);
 745   static void set_annotations(oop constructor, oop value);
 746 
 747   static bool has_parameter_annotations_field();
 748   static oop parameter_annotations(oop method);
 749   static void set_parameter_annotations(oop method, oop value);
 750 
 751   static bool has_annotation_default_field();
 752   static oop annotation_default(oop method);
 753   static void set_annotation_default(oop method, oop value);
 754 
 755   static bool has_type_annotations_field();
 756   static oop type_annotations(oop field);
 757   static void set_type_annotations(oop field, oop value);
 758 
 759   // Debugging
 760   friend class JavaClasses;
 761 };
 762 
 763 class java_lang_reflect_Parameter {
 764  private:
 765   // Note that to reduce dependencies on the JDK we compute these
 766   // offsets at run-time.
 767   static int name_offset;
 768   static int modifiers_offset;
 769   static int index_offset;
 770   static int executable_offset;
 771 
 772   static void compute_offsets();
 773 
 774  public:
 775   // Allocation
 776   static Handle create(TRAPS);
 777 
 778   // Accessors
 779   static oop name(oop field);
 780   static void set_name(oop field, oop value);
 781 
 782   static int index(oop reflect);
 783   static void set_index(oop reflect, int value);
 784 
 785   static int modifiers(oop reflect);
 786   static void set_modifiers(oop reflect, int value);
 787 
 788   static oop executable(oop constructor);
 789   static void set_executable(oop constructor, oop value);
 790 
 791   friend class JavaClasses;
 792 };
 793 
 794 // Interface to sun.reflect.ConstantPool objects
 795 class sun_reflect_ConstantPool {
 796  private:
 797   // Note that to reduce dependencies on the JDK we compute these
 798   // offsets at run-time.
 799   static int _oop_offset;
 800 
 801   static void compute_offsets();
 802 
 803  public:
 804   // Allocation
 805   static Handle create(TRAPS);
 806 
 807   // Accessors
 808   static void set_cp(oop reflect, ConstantPool* value);
 809   static int oop_offset() {
 810     return _oop_offset;
 811   }
 812 
 813   static ConstantPool* get_cp(oop reflect);
 814 
 815   // Debugging
 816   friend class JavaClasses;
 817 };
 818 
 819 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects
 820 class sun_reflect_UnsafeStaticFieldAccessorImpl {
 821  private:
 822   static int _base_offset;
 823   static void compute_offsets();
 824 
 825  public:
 826   static int base_offset() {
 827     return _base_offset;
 828   }
 829 
 830   // Debugging
 831   friend class JavaClasses;
 832 };
 833 
 834 // Interface to java.lang primitive type boxing objects:
 835 //  - java.lang.Boolean
 836 //  - java.lang.Character
 837 //  - java.lang.Float
 838 //  - java.lang.Double
 839 //  - java.lang.Byte
 840 //  - java.lang.Short
 841 //  - java.lang.Integer
 842 //  - java.lang.Long
 843 
 844 // This could be separated out into 8 individual classes.
 845 
 846 class java_lang_boxing_object: AllStatic {
 847  private:
 848   enum {
 849    hc_value_offset = 0
 850   };
 851   static int value_offset;
 852   static int long_value_offset;
 853 
 854   static oop initialize_and_allocate(BasicType type, TRAPS);
 855  public:
 856   // Allocation. Returns a boxed value, or NULL for invalid type.
 857   static oop create(BasicType type, jvalue* value, TRAPS);
 858   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 859   static BasicType get_value(oop box, jvalue* value);
 860   static BasicType set_value(oop box, jvalue* value);
 861   static BasicType basic_type(oop box);
 862   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 863   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 864   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 865   static void print(BasicType type, jvalue* value, outputStream* st);
 866 
 867   static int value_offset_in_bytes(BasicType type) {
 868     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 869                                                     value_offset;
 870   }
 871 
 872   // Debugging
 873   friend class JavaClasses;
 874 };
 875 
 876 
 877 
 878 // Interface to java.lang.ref.Reference objects
 879 
 880 class java_lang_ref_Reference: AllStatic {
 881  public:
 882   enum {
 883    hc_referent_offset   = 0,
 884    hc_queue_offset      = 1,
 885    hc_next_offset       = 2,
 886    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 887   };
 888   enum {
 889    hc_static_lock_offset    = 0,
 890    hc_static_pending_offset = 1
 891   };
 892 
 893   static int referent_offset;
 894   static int queue_offset;
 895   static int next_offset;
 896   static int discovered_offset;
 897   static int static_lock_offset;
 898   static int static_pending_offset;
 899   static int number_of_fake_oop_fields;
 900 
 901   // Accessors
 902   static oop referent(oop ref) {
 903     return ref->obj_field(referent_offset);
 904   }
 905   static void set_referent(oop ref, oop value) {
 906     ref->obj_field_put(referent_offset, value);
 907   }
 908   static void set_referent_raw(oop ref, oop value) {
 909     ref->obj_field_put_raw(referent_offset, value);
 910   }
 911   static HeapWord* referent_addr(oop ref) {
 912     return ref->obj_field_addr<HeapWord>(referent_offset);
 913   }
 914   static oop next(oop ref) {
 915     return ref->obj_field(next_offset);
 916   }
 917   static void set_next(oop ref, oop value) {
 918     ref->obj_field_put(next_offset, value);
 919   }
 920   static void set_next_raw(oop ref, oop value) {
 921     ref->obj_field_put_raw(next_offset, value);
 922   }
 923   static HeapWord* next_addr(oop ref) {
 924     return ref->obj_field_addr<HeapWord>(next_offset);
 925   }
 926   static oop discovered(oop ref) {
 927     return ref->obj_field(discovered_offset);
 928   }
 929   static void set_discovered(oop ref, oop value) {
 930     ref->obj_field_put(discovered_offset, value);
 931   }
 932   static void set_discovered_raw(oop ref, oop value) {
 933     ref->obj_field_put_raw(discovered_offset, value);
 934   }
 935   static HeapWord* discovered_addr(oop ref) {
 936     return ref->obj_field_addr<HeapWord>(discovered_offset);
 937   }
 938   // Accessors for statics
 939   static oop  pending_list_lock();
 940   static oop  pending_list();
 941 
 942   static HeapWord*  pending_list_lock_addr();
 943   static HeapWord*  pending_list_addr();
 944 };
 945 
 946 
 947 // Interface to java.lang.ref.SoftReference objects
 948 
 949 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 950  public:
 951   enum {
 952    // The timestamp is a long field and may need to be adjusted for alignment.
 953    hc_timestamp_offset  = hc_discovered_offset + 1
 954   };
 955   enum {
 956    hc_static_clock_offset = 0
 957   };
 958 
 959   static int timestamp_offset;
 960   static int static_clock_offset;
 961 
 962   // Accessors
 963   static jlong timestamp(oop ref);
 964 
 965   // Accessors for statics
 966   static jlong clock();
 967   static void set_clock(jlong value);
 968 };
 969 
 970 // Interface to java.lang.invoke.MethodHandle objects
 971 
 972 class MethodHandleEntry;
 973 
 974 class java_lang_invoke_MethodHandle: AllStatic {
 975   friend class JavaClasses;
 976 
 977  private:
 978   static int _type_offset;               // the MethodType of this MH
 979   static int _form_offset;               // the LambdaForm of this MH
 980 
 981   static void compute_offsets();
 982 
 983  public:
 984   // Accessors
 985   static oop            type(oop mh);
 986   static void       set_type(oop mh, oop mtype);
 987 
 988   static oop            form(oop mh);
 989   static void       set_form(oop mh, oop lform);
 990 
 991   // Testers
 992   static bool is_subclass(Klass* klass) {
 993     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 994   }
 995   static bool is_instance(oop obj);
 996 
 997   // Accessors for code generation:
 998   static int type_offset_in_bytes()             { return _type_offset; }
 999   static int form_offset_in_bytes()             { return _form_offset; }
1000 };
1001 
1002 // Interface to java.lang.invoke.DirectMethodHandle objects
1003 
1004 class java_lang_invoke_DirectMethodHandle: AllStatic {
1005   friend class JavaClasses;
1006 
1007  private:
1008   static int _member_offset;               // the MemberName of this DMH
1009 
1010   static void compute_offsets();
1011 
1012  public:
1013   // Accessors
1014   static oop  member(oop mh);
1015 
1016   // Testers
1017   static bool is_subclass(Klass* klass) {
1018     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1019   }
1020   static bool is_instance(oop obj);
1021 
1022   // Accessors for code generation:
1023   static int member_offset_in_bytes()           { return _member_offset; }
1024 };
1025 
1026 // Interface to java.lang.invoke.LambdaForm objects
1027 // (These are a private interface for managing adapter code generation.)
1028 
1029 class java_lang_invoke_LambdaForm: AllStatic {
1030   friend class JavaClasses;
1031 
1032  private:
1033   static int _vmentry_offset;  // type is MemberName
1034 
1035   static void compute_offsets();
1036 
1037  public:
1038   // Accessors
1039   static oop            vmentry(oop lform);
1040   static void       set_vmentry(oop lform, oop invoker);
1041 
1042   // Testers
1043   static bool is_subclass(Klass* klass) {
1044     return SystemDictionary::LambdaForm_klass() != NULL &&
1045       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1046   }
1047   static bool is_instance(oop obj);
1048 
1049   // Accessors for code generation:
1050   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1051 };
1052 
1053 
1054 // Interface to java.lang.invoke.MemberName objects
1055 // (These are a private interface for Java code to query the class hierarchy.)
1056 
1057 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1058   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1059   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1060   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1061 
1062 class java_lang_invoke_MemberName: AllStatic {
1063   friend class JavaClasses;
1064 
1065  private:
1066   // From java.lang.invoke.MemberName:
1067   //    private Class<?>   clazz;       // class in which the method is defined
1068   //    private String     name;        // may be null if not yet materialized
1069   //    private Object     type;        // may be null if not yet materialized
1070   //    private int        flags;       // modifier bits; see reflect.Modifier
1071   //    private intptr     vmtarget;    // VM-specific target value
1072   //    private intptr_t   vmindex;     // member index within class or interface
1073   static int _clazz_offset;
1074   static int _name_offset;
1075   static int _type_offset;
1076   static int _flags_offset;
1077   static int _vmtarget_offset;
1078   static int _vmloader_offset;
1079   static int _vmindex_offset;
1080 
1081   static void compute_offsets();
1082 
1083  public:
1084   // Accessors
1085   static oop            clazz(oop mname);
1086   static void       set_clazz(oop mname, oop clazz);
1087 
1088   static oop            type(oop mname);
1089   static void       set_type(oop mname, oop type);
1090 
1091   static oop            name(oop mname);
1092   static void       set_name(oop mname, oop name);
1093 
1094   static int            flags(oop mname);
1095   static void       set_flags(oop mname, int flags);
1096 
1097   static Metadata*      vmtarget(oop mname);
1098   static void       set_vmtarget(oop mname, Metadata* target);
1099 
1100   static intptr_t       vmindex(oop mname);
1101   static void       set_vmindex(oop mname, intptr_t index);
1102 
1103   // Testers
1104   static bool is_subclass(Klass* klass) {
1105     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1106   }
1107   static bool is_instance(oop obj);
1108 
1109   static bool is_method(oop obj);
1110 
1111   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1112   enum {
1113     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1114     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1115     MN_IS_FIELD             = 0x00040000, // field
1116     MN_IS_TYPE              = 0x00080000, // nested type
1117     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1118     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1119     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1120     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1121     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1122     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1123   };
1124 
1125   // Accessors for code generation:
1126   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1127   static int type_offset_in_bytes()             { return _type_offset; }
1128   static int name_offset_in_bytes()             { return _name_offset; }
1129   static int flags_offset_in_bytes()            { return _flags_offset; }
1130   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1131   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1132 };
1133 
1134 
1135 // Interface to java.lang.invoke.MethodType objects
1136 
1137 class java_lang_invoke_MethodType: AllStatic {
1138   friend class JavaClasses;
1139 
1140  private:
1141   static int _rtype_offset;
1142   static int _ptypes_offset;
1143 
1144   static void compute_offsets();
1145 
1146  public:
1147   // Accessors
1148   static oop            rtype(oop mt);
1149   static objArrayOop    ptypes(oop mt);
1150 
1151   static oop            ptype(oop mt, int index);
1152   static int            ptype_count(oop mt);
1153 
1154   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1155   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1156 
1157   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1158   static void           print_signature(oop mt, outputStream* st);
1159 
1160   static bool is_instance(oop obj);
1161 
1162   static bool equals(oop mt1, oop mt2);
1163 
1164   // Accessors for code generation:
1165   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1166   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1167 };
1168 
1169 
1170 // Interface to java.lang.invoke.CallSite objects
1171 
1172 class java_lang_invoke_CallSite: AllStatic {
1173   friend class JavaClasses;
1174 
1175 private:
1176   static int _target_offset;
1177   static int _context_offset;
1178 
1179   static void compute_offsets();
1180 
1181 public:
1182   // Accessors
1183   static oop              target(          oop site);
1184   static void         set_target(          oop site, oop target);
1185   static void         set_target_volatile( oop site, oop target);
1186 
1187   static oop              context(oop site);
1188 
1189   // Testers
1190   static bool is_subclass(Klass* klass) {
1191     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1192   }
1193   static bool is_instance(oop obj);
1194 
1195   // Accessors for code generation:
1196   static int target_offset_in_bytes()           { return _target_offset; }
1197 };
1198 
1199 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1200 
1201 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1202   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1203 
1204 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1205   friend class JavaClasses;
1206 
1207 private:
1208   static int _vmdependencies_offset;
1209 
1210   static void compute_offsets();
1211 
1212 public:
1213   // Accessors
1214   static nmethodBucket* vmdependencies(oop context);
1215   static void       set_vmdependencies(oop context, nmethodBucket* bucket);
1216 
1217   // Testers
1218   static bool is_subclass(Klass* klass) {
1219     return klass->is_subclass_of(SystemDictionary::Context_klass());
1220   }
1221   static bool is_instance(oop obj);
1222 };
1223 
1224 // Interface to java.security.AccessControlContext objects
1225 
1226 class java_security_AccessControlContext: AllStatic {
1227  private:
1228   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1229   // so we compute the offsets at startup rather than hard-wiring them.
1230   static int _context_offset;
1231   static int _privilegedContext_offset;
1232   static int _isPrivileged_offset;
1233   static int _isAuthorized_offset;
1234 
1235   static void compute_offsets();
1236  public:
1237   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1238 
1239   static bool is_authorized(Handle context);
1240 
1241   // Debugging/initialization
1242   friend class JavaClasses;
1243 };
1244 
1245 
1246 // Interface to java.lang.ClassLoader objects
1247 
1248 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1249   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1250 
1251 class java_lang_ClassLoader : AllStatic {
1252  private:
1253   // The fake offsets are added by the class loader when java.lang.Class is loaded
1254   enum {
1255    hc_parent_offset = 0
1256   };
1257   static int _loader_data_offset;
1258   static bool offsets_computed;
1259   static int parent_offset;
1260   static int parallelCapable_offset;
1261 
1262  public:
1263   static void compute_offsets();
1264 
1265   static ClassLoaderData** loader_data_addr(oop loader);
1266   static ClassLoaderData* loader_data(oop loader);
1267 
1268   static oop parent(oop loader);
1269   static bool isAncestor(oop loader, oop cl);
1270 
1271   // Support for parallelCapable field
1272   static bool parallelCapable(oop the_class_mirror);
1273 
1274   static bool is_trusted_loader(oop loader);
1275 
1276   // Fix for 4474172
1277   static oop  non_reflection_class_loader(oop loader);
1278 
1279   // Testers
1280   static bool is_subclass(Klass* klass) {
1281     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1282   }
1283   static bool is_instance(oop obj);
1284 
1285   // Debugging
1286   friend class JavaClasses;
1287   friend class ClassFileParser; // access to number_of_fake_fields
1288 };
1289 
1290 
1291 // Interface to java.lang.System objects
1292 
1293 class java_lang_System : AllStatic {
1294  private:
1295   enum {
1296    hc_static_in_offset  = 0,
1297    hc_static_out_offset = 1,
1298    hc_static_err_offset = 2,
1299    hc_static_security_offset = 3
1300   };
1301 
1302   static int  static_in_offset;
1303   static int static_out_offset;
1304   static int static_err_offset;
1305   static int static_security_offset;
1306 
1307  public:
1308   static int  in_offset_in_bytes();
1309   static int out_offset_in_bytes();
1310   static int err_offset_in_bytes();
1311 
1312   static bool has_security_manager();
1313 
1314   // Debugging
1315   friend class JavaClasses;
1316 };
1317 
1318 
1319 // Interface to java.lang.StackTraceElement objects
1320 
1321 class java_lang_StackTraceElement: AllStatic {
1322  private:
1323   enum {
1324     hc_declaringClass_offset  = 0,
1325     hc_methodName_offset = 1,
1326     hc_fileName_offset   = 2,
1327     hc_lineNumber_offset = 3
1328   };
1329 
1330   static int declaringClass_offset;
1331   static int methodName_offset;
1332   static int fileName_offset;
1333   static int lineNumber_offset;
1334 
1335  public:
1336   // Setters
1337   static void set_declaringClass(oop element, oop value);
1338   static void set_methodName(oop element, oop value);
1339   static void set_fileName(oop element, oop value);
1340   static void set_lineNumber(oop element, int value);
1341 
1342   // Create an instance of StackTraceElement
1343   static oop create(Handle mirror, int method, int version, int bci, int cpref, TRAPS);
1344   static oop create(methodHandle method, int bci, TRAPS);
1345 
1346   // Debugging
1347   friend class JavaClasses;
1348 };
1349 
1350 
1351 // Interface to java.lang.AssertionStatusDirectives objects
1352 
1353 class java_lang_AssertionStatusDirectives: AllStatic {
1354  private:
1355   enum {
1356     hc_classes_offset,
1357     hc_classEnabled_offset,
1358     hc_packages_offset,
1359     hc_packageEnabled_offset,
1360     hc_deflt_offset
1361   };
1362 
1363   static int classes_offset;
1364   static int classEnabled_offset;
1365   static int packages_offset;
1366   static int packageEnabled_offset;
1367   static int deflt_offset;
1368 
1369  public:
1370   // Setters
1371   static void set_classes(oop obj, oop val);
1372   static void set_classEnabled(oop obj, oop val);
1373   static void set_packages(oop obj, oop val);
1374   static void set_packageEnabled(oop obj, oop val);
1375   static void set_deflt(oop obj, bool val);
1376   // Debugging
1377   friend class JavaClasses;
1378 };
1379 
1380 
1381 class java_nio_Buffer: AllStatic {
1382  private:
1383   static int _limit_offset;
1384 
1385  public:
1386   static int  limit_offset();
1387   static void compute_offsets();
1388 };
1389 
1390 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1391  private:
1392   static int  _owner_offset;
1393  public:
1394   static void initialize(TRAPS);
1395   static oop  get_owner_threadObj(oop obj);
1396 };
1397 
1398 // Use to declare fields that need to be injected into Java classes
1399 // for the JVM to use.  The name_index and signature_index are
1400 // declared in vmSymbols.  The may_be_java flag is used to declare
1401 // fields that might already exist in Java but should be injected if
1402 // they don't.  Otherwise the field is unconditionally injected and
1403 // the JVM uses the injected one.  This is to ensure that name
1404 // collisions don't occur.  In general may_be_java should be false
1405 // unless there's a good reason.
1406 
1407 class InjectedField {
1408  public:
1409   const SystemDictionary::WKID klass_id;
1410   const vmSymbols::SID name_index;
1411   const vmSymbols::SID signature_index;
1412   const bool           may_be_java;
1413 
1414 
1415   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1416   Symbol* name() const      { return lookup_symbol(name_index); }
1417   Symbol* signature() const { return lookup_symbol(signature_index); }
1418 
1419   int compute_offset();
1420 
1421   // Find the Symbol for this index
1422   static Symbol* lookup_symbol(int symbol_index) {
1423     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1424   }
1425 };
1426 
1427 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1428   klass##_##name##_enum,
1429 
1430 #define ALL_INJECTED_FIELDS(macro)          \
1431   CLASS_INJECTED_FIELDS(macro)              \
1432   CLASSLOADER_INJECTED_FIELDS(macro)        \
1433   MEMBERNAME_INJECTED_FIELDS(macro)         \
1434   CALLSITECONTEXT_INJECTED_FIELDS(macro)
1435 
1436 // Interface to hard-coded offset checking
1437 
1438 class JavaClasses : AllStatic {
1439  private:
1440 
1441   static InjectedField _injected_fields[];
1442 
1443   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1444   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1445   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1446 
1447  public:
1448   enum InjectedFieldID {
1449     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1450     MAX_enum
1451   };
1452 
1453   static int compute_injected_offset(InjectedFieldID id);
1454 
1455   static void compute_hard_coded_offsets();
1456   static void compute_offsets();
1457   static void check_offsets() PRODUCT_RETURN;
1458 
1459   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1460 };
1461 
1462 #undef DECLARE_INJECTED_FIELD_ENUM
1463 
1464 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP