1 /*
   2  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  26 #define SHARE_VM_CLASSFILE_JAVACLASSES_HPP
  27 
  28 #include "classfile/systemDictionary.hpp"
  29 #include "jvmtifiles/jvmti.h"
  30 #include "oops/oop.hpp"
  31 #include "runtime/os.hpp"
  32 #include "utilities/utf8.hpp"
  33 
  34 // Interface for manipulating the basic Java classes.
  35 //
  36 // All dependencies on layout of actual Java classes should be kept here.
  37 // If the layout of any of the classes above changes the offsets must be adjusted.
  38 //
  39 // For most classes we hardwire the offsets for performance reasons. In certain
  40 // cases (e.g. java.security.AccessControlContext) we compute the offsets at
  41 // startup since the layout here differs between JDK1.2 and JDK1.3.
  42 //
  43 // Note that fields (static and non-static) are arranged with oops before non-oops
  44 // on a per class basis. The offsets below have to reflect this ordering.
  45 //
  46 // When editing the layouts please update the check_offset verification code
  47 // correspondingly. The names in the enums must be identical to the actual field
  48 // names in order for the verification code to work.
  49 
  50 
  51 // Interface to java.lang.String objects
  52 
  53 class java_lang_String : AllStatic {
  54  private:
  55   static int value_offset;
  56   static int offset_offset;
  57   static int count_offset;
  58   static int hash_offset;
  59 
  60   static bool initialized;
  61 
  62   static Handle basic_create(int length, TRAPS);
  63 
  64   static void set_offset(oop string, int offset) {
  65     assert(initialized, "Must be initialized");
  66     if (offset_offset > 0) {
  67       string->int_field_put(offset_offset, offset);
  68     }
  69   }
  70   static void set_count( oop string, int count) {
  71     assert(initialized, "Must be initialized");
  72     if (count_offset > 0) {
  73       string->int_field_put(count_offset,  count);
  74     }
  75   }
  76 
  77  public:
  78   static void compute_offsets();
  79 
  80   // Instance creation
  81   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  82   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  83   static Handle create_from_str(const char* utf8_str, TRAPS);
  84   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  85   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  86   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  87   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  88 
  89   static bool has_offset_field()  {
  90     assert(initialized, "Must be initialized");
  91     return (offset_offset > 0);
  92   }
  93 
  94   static bool has_count_field()  {
  95     assert(initialized, "Must be initialized");
  96     return (count_offset > 0);
  97   }
  98 
  99   static bool has_hash_field()  {
 100     assert(initialized, "Must be initialized");
 101     return (hash_offset > 0);
 102   }
 103 
 104   static int value_offset_in_bytes()  {
 105     assert(initialized && (value_offset > 0), "Must be initialized");
 106     return value_offset;
 107   }
 108   static int count_offset_in_bytes()  {
 109     assert(initialized && (count_offset > 0), "Must be initialized");
 110     return count_offset;
 111   }
 112   static int offset_offset_in_bytes() {
 113     assert(initialized && (offset_offset > 0), "Must be initialized");
 114     return offset_offset;
 115   }
 116   static int hash_offset_in_bytes()   {
 117     assert(initialized && (hash_offset > 0), "Must be initialized");
 118     return hash_offset;
 119   }
 120 
 121   static void set_value(oop string, typeArrayOop buffer) {
 122     assert(initialized && (value_offset > 0), "Must be initialized");
 123     string->obj_field_put(value_offset, (oop)buffer);
 124   }
 125   static void set_hash(oop string, unsigned int hash) {
 126     assert(initialized && (hash_offset > 0), "Must be initialized");
 127     string->int_field_put(hash_offset, hash);
 128   }
 129 
 130   // Accessors
 131   static typeArrayOop value(oop java_string) {
 132     assert(initialized && (value_offset > 0), "Must be initialized");
 133     assert(is_instance(java_string), "must be java_string");
 134     return (typeArrayOop) java_string->obj_field(value_offset);
 135   }
 136   static unsigned int hash(oop java_string) {
 137     assert(initialized && (hash_offset > 0), "Must be initialized");
 138     assert(is_instance(java_string), "must be java_string");
 139     return java_string->int_field(hash_offset);
 140   }
 141   static int offset(oop java_string) {
 142     assert(initialized, "Must be initialized");
 143     assert(is_instance(java_string), "must be java_string");
 144     if (offset_offset > 0) {
 145       return java_string->int_field(offset_offset);
 146     } else {
 147       return 0;
 148     }
 149   }
 150   static int length(oop java_string) {
 151     assert(initialized, "Must be initialized");
 152     assert(is_instance(java_string), "must be java_string");
 153     if (count_offset > 0) {
 154       return java_string->int_field(count_offset);
 155     } else {
 156       return ((typeArrayOop)java_string->obj_field(value_offset))->length();
 157     }
 158   }
 159   static int utf8_length(oop java_string);
 160 
 161   // String converters
 162   static char*  as_utf8_string(oop java_string);
 163   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 164   static char*  as_utf8_string(oop java_string, int start, int len);
 165   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 166   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 167   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 168   // produce an ascii string with all other values quoted using \u####
 169   static char*  as_quoted_ascii(oop java_string);
 170 
 171   // Compute the hash value for a java.lang.String object which would
 172   // contain the characters passed in.
 173   //
 174   // As the hash value used by the String object itself, in
 175   // String.hashCode().  This value is normally calculated in Java code
 176   // in the String.hashCode method(), but is precomputed for String
 177   // objects in the shared archive file.
 178   // hash P(31) from Kernighan & Ritchie
 179   //
 180   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 181   template <typename T> static unsigned int hash_code(T* s, int len) {
 182     unsigned int h = 0;
 183     while (len-- > 0) {
 184       h = 31*h + (unsigned int) *s;
 185       s++;
 186     }
 187     return h;
 188   }
 189   static unsigned int hash_code(oop java_string);
 190 
 191   // This is the string hash code used by the StringTable, which may be
 192   // the same as String.hashCode or an alternate hash code.
 193   static unsigned int hash_string(oop java_string);
 194 
 195   static bool equals(oop java_string, jchar* chars, int len);
 196   static bool equals(oop str1, oop str2);
 197 
 198   // Conversion between '.' and '/' formats
 199   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 200   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 201 
 202   // Conversion
 203   static Symbol* as_symbol(Handle java_string, TRAPS);
 204   static Symbol* as_symbol_or_null(oop java_string);
 205 
 206   // Testers
 207   static bool is_instance(oop obj) {
 208     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, signers,                object_signature,  false)
 226 
 227 class java_lang_Class : AllStatic {
 228   friend class VMStructs;
 229 
 230  private:
 231   // The fake offsets are added by the class loader when java.lang.Class is loaded
 232 
 233   static int _klass_offset;
 234   static int _array_klass_offset;
 235 
 236   static int _oop_size_offset;
 237   static int _static_oop_field_count_offset;
 238 
 239   static int _protection_domain_offset;
 240   static int _init_lock_offset;
 241   static int _signers_offset;
 242   static int _class_loader_offset;
 243   static int _component_mirror_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 set_component_mirror(oop java_class, oop comp_mirror);
 254   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 255  public:
 256   static void compute_offsets();
 257 
 258   // Instance creation
 259   static void create_mirror(KlassHandle k, Handle class_loader,
 260                             Handle protection_domain, TRAPS);
 261   static void fixup_mirror(KlassHandle k, TRAPS);
 262   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 263   // Conversion
 264   static Klass* as_Klass(oop java_class);
 265   static void set_klass(oop java_class, Klass* klass);
 266   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 267   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 268     Klass* refk_oop = NULL;
 269     BasicType result = as_BasicType(java_class, &refk_oop);
 270     (*reference_klass) = KlassHandle(refk_oop);
 271     return result;
 272   }
 273   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 274   static void print_signature(oop java_class, outputStream *st);
 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 oop  component_mirror(oop java_class);
 296   static objArrayOop  signers(oop java_class);
 297   static void set_signers(oop java_class, objArrayOop signers);
 298 
 299   static oop class_loader(oop java_class);
 300 
 301   static int oop_size(oop java_class);
 302   static void set_oop_size(oop java_class, int size);
 303   static int static_oop_field_count(oop java_class);
 304   static void set_static_oop_field_count(oop java_class, int size);
 305 
 306   static GrowableArray<Klass*>* fixup_mirror_list() {
 307     return _fixup_mirror_list;
 308   }
 309   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 310     _fixup_mirror_list = v;
 311   }
 312   // Debugging
 313   friend class JavaClasses;
 314   friend class InstanceKlass;   // verification code accesses offsets
 315   friend class ClassFileParser; // access to number_of_fake_fields
 316 };
 317 
 318 // Interface to java.lang.Thread objects
 319 
 320 class java_lang_Thread : AllStatic {
 321  private:
 322   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 323   // so we compute the offsets at startup rather than hard-wiring them.
 324   static int _name_offset;
 325   static int _group_offset;
 326   static int _contextClassLoader_offset;
 327   static int _inheritedAccessControlContext_offset;
 328   static int _priority_offset;
 329   static int _eetop_offset;
 330   static int _daemon_offset;
 331   static int _stillborn_offset;
 332   static int _stackSize_offset;
 333   static int _tid_offset;
 334   static int _thread_status_offset;
 335   static int _park_blocker_offset;
 336   static int _park_event_offset ;
 337 
 338   static void compute_offsets();
 339 
 340  public:
 341   // Instance creation
 342   static oop create();
 343   // Returns the JavaThread associated with the thread obj
 344   static JavaThread* thread(oop java_thread);
 345   // Set JavaThread for instance
 346   static void set_thread(oop java_thread, JavaThread* thread);
 347   // Name
 348   static typeArrayOop name(oop java_thread);
 349   static void set_name(oop java_thread, typeArrayOop name);
 350   // Priority
 351   static ThreadPriority priority(oop java_thread);
 352   static void set_priority(oop java_thread, ThreadPriority priority);
 353   // Thread group
 354   static oop  threadGroup(oop java_thread);
 355   // Stillborn
 356   static bool is_stillborn(oop java_thread);
 357   static void set_stillborn(oop java_thread);
 358   // Alive (NOTE: this is not really a field, but provides the correct
 359   // definition without doing a Java call)
 360   static bool is_alive(oop java_thread);
 361   // Daemon
 362   static bool is_daemon(oop java_thread);
 363   static void set_daemon(oop java_thread);
 364   // Context ClassLoader
 365   static oop context_class_loader(oop java_thread);
 366   // Control context
 367   static oop inherited_access_control_context(oop java_thread);
 368   // Stack size hint
 369   static jlong stackSize(oop java_thread);
 370   // Thread ID
 371   static jlong thread_id(oop java_thread);
 372 
 373   // Blocker object responsible for thread parking
 374   static oop park_blocker(oop java_thread);
 375 
 376   // Pointer to type-stable park handler, encoded as jlong.
 377   // Should be set when apparently null
 378   // For details, see unsafe.cpp Unsafe_Unpark
 379   static jlong park_event(oop java_thread);
 380   static bool set_park_event(oop java_thread, jlong ptr);
 381 
 382   // Java Thread Status for JVMTI and M&M use.
 383   // This thread status info is saved in threadStatus field of
 384   // java.lang.Thread java class.
 385   enum ThreadStatus {
 386     NEW                      = 0,
 387     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 388                                JVMTI_THREAD_STATE_RUNNABLE,
 389     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 390                                JVMTI_THREAD_STATE_WAITING +
 391                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 392                                JVMTI_THREAD_STATE_SLEEPING,
 393     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 394                                JVMTI_THREAD_STATE_WAITING +
 395                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 396                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 397     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 398                                JVMTI_THREAD_STATE_WAITING +
 399                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 400                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 401     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 402                                JVMTI_THREAD_STATE_WAITING +
 403                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 404                                JVMTI_THREAD_STATE_PARKED,
 405     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 406                                JVMTI_THREAD_STATE_WAITING +
 407                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 408                                JVMTI_THREAD_STATE_PARKED,
 409     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 410                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 411     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 412   };
 413   // Write thread status info to threadStatus field of java.lang.Thread.
 414   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 415   // Read thread status info from threadStatus field of java.lang.Thread.
 416   static ThreadStatus get_thread_status(oop java_thread_oop);
 417 
 418   static const char*  thread_status_name(oop java_thread_oop);
 419 
 420   // Debugging
 421   friend class JavaClasses;
 422 };
 423 
 424 // Interface to java.lang.ThreadGroup objects
 425 
 426 class java_lang_ThreadGroup : AllStatic {
 427  private:
 428   static int _parent_offset;
 429   static int _name_offset;
 430   static int _threads_offset;
 431   static int _groups_offset;
 432   static int _maxPriority_offset;
 433   static int _destroyed_offset;
 434   static int _daemon_offset;
 435   static int _vmAllowSuspension_offset;
 436   static int _nthreads_offset;
 437   static int _ngroups_offset;
 438 
 439   static void compute_offsets();
 440 
 441  public:
 442   // parent ThreadGroup
 443   static oop  parent(oop java_thread_group);
 444   // name
 445   static typeArrayOop name(oop java_thread_group);
 446   // ("name as oop" accessor is not necessary)
 447   // Number of threads in group
 448   static int nthreads(oop java_thread_group);
 449   // threads
 450   static objArrayOop threads(oop java_thread_group);
 451   // Number of threads in group
 452   static int ngroups(oop java_thread_group);
 453   // groups
 454   static objArrayOop groups(oop java_thread_group);
 455   // maxPriority in group
 456   static ThreadPriority maxPriority(oop java_thread_group);
 457   // Destroyed
 458   static bool is_destroyed(oop java_thread_group);
 459   // Daemon
 460   static bool is_daemon(oop java_thread_group);
 461   // vmAllowSuspension
 462   static bool is_vmAllowSuspension(oop java_thread_group);
 463   // Debugging
 464   friend class JavaClasses;
 465 };
 466 
 467 
 468 
 469 // Interface to java.lang.Throwable objects
 470 
 471 class java_lang_Throwable: AllStatic {
 472   friend class BacktraceBuilder;
 473 
 474  private:
 475   // Offsets
 476   enum {
 477     hc_backtrace_offset     =  0,
 478     hc_detailMessage_offset =  1,
 479     hc_cause_offset         =  2,  // New since 1.4
 480     hc_stackTrace_offset    =  3   // New since 1.4
 481   };
 482   enum {
 483       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 484   };
 485   // Trace constants
 486   enum {
 487     trace_methods_offset = 0,
 488     trace_bcis_offset    = 1,
 489     trace_mirrors_offset = 2,
 490     trace_next_offset    = 3,
 491     trace_size           = 4,
 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);
 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);
 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   // Accessors for statics
 935   static oop  pending_list_lock();
 936   static oop  pending_list();
 937 
 938   static HeapWord*  pending_list_lock_addr();
 939   static HeapWord*  pending_list_addr();
 940 };
 941 
 942 
 943 // Interface to java.lang.ref.SoftReference objects
 944 
 945 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 946  public:
 947   enum {
 948    // The timestamp is a long field and may need to be adjusted for alignment.
 949    hc_timestamp_offset  = hc_discovered_offset + 1
 950   };
 951   enum {
 952    hc_static_clock_offset = 0
 953   };
 954 
 955   static int timestamp_offset;
 956   static int static_clock_offset;
 957 
 958   // Accessors
 959   static jlong timestamp(oop ref);
 960 
 961   // Accessors for statics
 962   static jlong clock();
 963   static void set_clock(jlong value);
 964 };
 965 
 966 
 967 // Interface to java.lang.invoke.MethodHandle objects
 968 
 969 class MethodHandleEntry;
 970 
 971 class java_lang_invoke_MethodHandle: AllStatic {
 972   friend class JavaClasses;
 973 
 974  private:
 975   static int _type_offset;               // the MethodType of this MH
 976   static int _form_offset;               // the LambdaForm of this MH
 977 
 978   static void compute_offsets();
 979 
 980  public:
 981   // Accessors
 982   static oop            type(oop mh);
 983   static void       set_type(oop mh, oop mtype);
 984 
 985   static oop            form(oop mh);
 986   static void       set_form(oop mh, oop lform);
 987 
 988   // Testers
 989   static bool is_subclass(Klass* klass) {
 990     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 991   }
 992   static bool is_instance(oop obj) {
 993     return obj != NULL && is_subclass(obj->klass());
 994   }
 995 
 996   // Accessors for code generation:
 997   static int type_offset_in_bytes()             { return _type_offset; }
 998   static int form_offset_in_bytes()             { return _form_offset; }
 999 };
1000 
1001 // Interface to java.lang.invoke.DirectMethodHandle objects
1002 
1003 class java_lang_invoke_DirectMethodHandle: AllStatic {
1004   friend class JavaClasses;
1005 
1006  private:
1007   static int _member_offset;               // the MemberName of this DMH
1008 
1009   static void compute_offsets();
1010 
1011  public:
1012   // Accessors
1013   static oop  member(oop mh);
1014 
1015   // Testers
1016   static bool is_subclass(Klass* klass) {
1017     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
1018   }
1019   static bool is_instance(oop obj) {
1020     return obj != NULL && is_subclass(obj->klass());
1021   }
1022 
1023   // Accessors for code generation:
1024   static int member_offset_in_bytes()           { return _member_offset; }
1025 };
1026 
1027 // Interface to java.lang.invoke.LambdaForm objects
1028 // (These are a private interface for managing adapter code generation.)
1029 
1030 class java_lang_invoke_LambdaForm: AllStatic {
1031   friend class JavaClasses;
1032 
1033  private:
1034   static int _vmentry_offset;  // type is MemberName
1035 
1036   static void compute_offsets();
1037 
1038  public:
1039   // Accessors
1040   static oop            vmentry(oop lform);
1041   static void       set_vmentry(oop lform, oop invoker);
1042 
1043   // Testers
1044   static bool is_subclass(Klass* klass) {
1045     return SystemDictionary::LambdaForm_klass() != NULL &&
1046       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1047   }
1048   static bool is_instance(oop obj) {
1049     return obj != NULL && is_subclass(obj->klass());
1050   }
1051 
1052   // Accessors for code generation:
1053   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1054 };
1055 
1056 
1057 // Interface to java.lang.invoke.MemberName objects
1058 // (These are a private interface for Java code to query the class hierarchy.)
1059 
1060 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1061   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1062   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1063   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1064 
1065 class java_lang_invoke_MemberName: AllStatic {
1066   friend class JavaClasses;
1067 
1068  private:
1069   // From java.lang.invoke.MemberName:
1070   //    private Class<?>   clazz;       // class in which the method is defined
1071   //    private String     name;        // may be null if not yet materialized
1072   //    private Object     type;        // may be null if not yet materialized
1073   //    private int        flags;       // modifier bits; see reflect.Modifier
1074   //    private intptr     vmtarget;    // VM-specific target value
1075   //    private intptr_t   vmindex;     // member index within class or interface
1076   static int _clazz_offset;
1077   static int _name_offset;
1078   static int _type_offset;
1079   static int _flags_offset;
1080   static int _vmtarget_offset;
1081   static int _vmloader_offset;
1082   static int _vmindex_offset;
1083 
1084   static void compute_offsets();
1085 
1086  public:
1087   // Accessors
1088   static oop            clazz(oop mname);
1089   static void       set_clazz(oop mname, oop clazz);
1090 
1091   static oop            type(oop mname);
1092   static void       set_type(oop mname, oop type);
1093 
1094   static oop            name(oop mname);
1095   static void       set_name(oop mname, oop name);
1096 
1097   static int            flags(oop mname);
1098   static void       set_flags(oop mname, int flags);
1099 
1100   static Metadata*      vmtarget(oop mname);
1101   static void       set_vmtarget(oop mname, Metadata* target);
1102 #if INCLUDE_JVMTI
1103   static void       adjust_vmtarget(oop mname, Metadata* target);
1104 #endif // INCLUDE_JVMTI
1105 
1106   static intptr_t       vmindex(oop mname);
1107   static void       set_vmindex(oop mname, intptr_t index);
1108 
1109   // Testers
1110   static bool is_subclass(Klass* klass) {
1111     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1112   }
1113   static bool is_instance(oop obj) {
1114     return obj != NULL && is_subclass(obj->klass());
1115   }
1116 
1117   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1118   enum {
1119     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1120     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1121     MN_IS_FIELD             = 0x00040000, // field
1122     MN_IS_TYPE              = 0x00080000, // nested type
1123     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1124     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1125     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1126     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1127     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1128     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1129   };
1130 
1131   // Accessors for code generation:
1132   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1133   static int type_offset_in_bytes()             { return _type_offset; }
1134   static int name_offset_in_bytes()             { return _name_offset; }
1135   static int flags_offset_in_bytes()            { return _flags_offset; }
1136   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1137   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1138 };
1139 
1140 
1141 // Interface to java.lang.invoke.MethodType objects
1142 
1143 class java_lang_invoke_MethodType: AllStatic {
1144   friend class JavaClasses;
1145 
1146  private:
1147   static int _rtype_offset;
1148   static int _ptypes_offset;
1149 
1150   static void compute_offsets();
1151 
1152  public:
1153   // Accessors
1154   static oop            rtype(oop mt);
1155   static objArrayOop    ptypes(oop mt);
1156 
1157   static oop            ptype(oop mt, int index);
1158   static int            ptype_count(oop mt);
1159 
1160   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1161   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1162 
1163   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1164   static void           print_signature(oop mt, outputStream* st);
1165 
1166   static bool is_instance(oop obj) {
1167     return obj != NULL && obj->klass() == SystemDictionary::MethodType_klass();
1168   }
1169 
1170   static bool equals(oop mt1, oop mt2);
1171 
1172   // Accessors for code generation:
1173   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1174   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1175 };
1176 
1177 
1178 // Interface to java.lang.invoke.CallSite objects
1179 
1180 class java_lang_invoke_CallSite: AllStatic {
1181   friend class JavaClasses;
1182 
1183 private:
1184   static int _target_offset;
1185 
1186   static void compute_offsets();
1187 
1188 public:
1189   // Accessors
1190   static oop              target(         oop site)             { return site->obj_field(             _target_offset);         }
1191   static void         set_target(         oop site, oop target) {        site->obj_field_put(         _target_offset, target); }
1192 
1193   static volatile oop     target_volatile(oop site)             { return oop((oopDesc *)(site->obj_field_volatile(_target_offset))); }
1194   static void         set_target_volatile(oop site, oop target) {        site->obj_field_put_volatile(_target_offset, target); }
1195 
1196   // Testers
1197   static bool is_subclass(Klass* klass) {
1198     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1199   }
1200   static bool is_instance(oop obj) {
1201     return obj != NULL && is_subclass(obj->klass());
1202   }
1203 
1204   // Accessors for code generation:
1205   static int target_offset_in_bytes()           { return _target_offset; }
1206 };
1207 
1208 
1209 // Interface to java.security.AccessControlContext objects
1210 
1211 class java_security_AccessControlContext: AllStatic {
1212  private:
1213   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1214   // so we compute the offsets at startup rather than hard-wiring them.
1215   static int _context_offset;
1216   static int _privilegedContext_offset;
1217   static int _isPrivileged_offset;
1218   static int _isAuthorized_offset;
1219 
1220   static void compute_offsets();
1221  public:
1222   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1223 
1224   static bool is_authorized(Handle context);
1225 
1226   // Debugging/initialization
1227   friend class JavaClasses;
1228 };
1229 
1230 
1231 // Interface to java.lang.ClassLoader objects
1232 
1233 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1234   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1235 
1236 class java_lang_ClassLoader : AllStatic {
1237  private:
1238   // The fake offsets are added by the class loader when java.lang.Class is loaded
1239   enum {
1240    hc_parent_offset = 0
1241   };
1242   static int _loader_data_offset;
1243   static bool offsets_computed;
1244   static int parent_offset;
1245   static int parallelCapable_offset;
1246 
1247  public:
1248   static void compute_offsets();
1249 
1250   static ClassLoaderData** loader_data_addr(oop loader);
1251   static ClassLoaderData* loader_data(oop loader);
1252 
1253   static oop parent(oop loader);
1254   static bool isAncestor(oop loader, oop cl);
1255 
1256   // Support for parallelCapable field
1257   static bool parallelCapable(oop the_class_mirror);
1258 
1259   static bool is_trusted_loader(oop loader);
1260 
1261   // Fix for 4474172
1262   static oop  non_reflection_class_loader(oop loader);
1263 
1264   // Testers
1265   static bool is_subclass(Klass* klass) {
1266     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1267   }
1268   static bool is_instance(oop obj) {
1269     return obj != NULL && is_subclass(obj->klass());
1270   }
1271 
1272   // Debugging
1273   friend class JavaClasses;
1274   friend class ClassFileParser; // access to number_of_fake_fields
1275 };
1276 
1277 
1278 // Interface to java.lang.System objects
1279 
1280 class java_lang_System : AllStatic {
1281  private:
1282   enum {
1283    hc_static_in_offset  = 0,
1284    hc_static_out_offset = 1,
1285    hc_static_err_offset = 2,
1286    hc_static_security_offset = 3
1287   };
1288 
1289   static int  static_in_offset;
1290   static int static_out_offset;
1291   static int static_err_offset;
1292   static int static_security_offset;
1293 
1294  public:
1295   static int  in_offset_in_bytes();
1296   static int out_offset_in_bytes();
1297   static int err_offset_in_bytes();
1298 
1299   static bool has_security_manager();
1300 
1301   // Debugging
1302   friend class JavaClasses;
1303 };
1304 
1305 
1306 // Interface to java.lang.StackTraceElement objects
1307 
1308 class java_lang_StackTraceElement: AllStatic {
1309  private:
1310   enum {
1311     hc_declaringClass_offset  = 0,
1312     hc_methodName_offset = 1,
1313     hc_fileName_offset   = 2,
1314     hc_lineNumber_offset = 3
1315   };
1316 
1317   static int declaringClass_offset;
1318   static int methodName_offset;
1319   static int fileName_offset;
1320   static int lineNumber_offset;
1321 
1322  public:
1323   // Setters
1324   static void set_declaringClass(oop element, oop value);
1325   static void set_methodName(oop element, oop value);
1326   static void set_fileName(oop element, oop value);
1327   static void set_lineNumber(oop element, int value);
1328 
1329   // Create an instance of StackTraceElement
1330   static oop create(Handle mirror, int method, int version, int bci, TRAPS);
1331   static oop create(methodHandle method, int bci, TRAPS);
1332 
1333   // Debugging
1334   friend class JavaClasses;
1335 };
1336 
1337 
1338 // Interface to java.lang.AssertionStatusDirectives objects
1339 
1340 class java_lang_AssertionStatusDirectives: AllStatic {
1341  private:
1342   enum {
1343     hc_classes_offset,
1344     hc_classEnabled_offset,
1345     hc_packages_offset,
1346     hc_packageEnabled_offset,
1347     hc_deflt_offset
1348   };
1349 
1350   static int classes_offset;
1351   static int classEnabled_offset;
1352   static int packages_offset;
1353   static int packageEnabled_offset;
1354   static int deflt_offset;
1355 
1356  public:
1357   // Setters
1358   static void set_classes(oop obj, oop val);
1359   static void set_classEnabled(oop obj, oop val);
1360   static void set_packages(oop obj, oop val);
1361   static void set_packageEnabled(oop obj, oop val);
1362   static void set_deflt(oop obj, bool val);
1363   // Debugging
1364   friend class JavaClasses;
1365 };
1366 
1367 
1368 class java_nio_Buffer: AllStatic {
1369  private:
1370   static int _limit_offset;
1371 
1372  public:
1373   static int  limit_offset();
1374   static void compute_offsets();
1375 };
1376 
1377 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1378  private:
1379   static int  _owner_offset;
1380  public:
1381   static void initialize(TRAPS);
1382   static oop  get_owner_threadObj(oop obj);
1383 };
1384 
1385 // Use to declare fields that need to be injected into Java classes
1386 // for the JVM to use.  The name_index and signature_index are
1387 // declared in vmSymbols.  The may_be_java flag is used to declare
1388 // fields that might already exist in Java but should be injected if
1389 // they don't.  Otherwise the field is unconditionally injected and
1390 // the JVM uses the injected one.  This is to ensure that name
1391 // collisions don't occur.  In general may_be_java should be false
1392 // unless there's a good reason.
1393 
1394 class InjectedField {
1395  public:
1396   const SystemDictionary::WKID klass_id;
1397   const vmSymbols::SID name_index;
1398   const vmSymbols::SID signature_index;
1399   const bool           may_be_java;
1400 
1401 
1402   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1403   Symbol* name() const      { return lookup_symbol(name_index); }
1404   Symbol* signature() const { return lookup_symbol(signature_index); }
1405 
1406   int compute_offset();
1407 
1408   // Find the Symbol for this index
1409   static Symbol* lookup_symbol(int symbol_index) {
1410     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1411   }
1412 };
1413 
1414 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1415   klass##_##name##_enum,
1416 
1417 #define ALL_INJECTED_FIELDS(macro)          \
1418   CLASS_INJECTED_FIELDS(macro)              \
1419   CLASSLOADER_INJECTED_FIELDS(macro)        \
1420   MEMBERNAME_INJECTED_FIELDS(macro)
1421 
1422 // Interface to hard-coded offset checking
1423 
1424 class JavaClasses : AllStatic {
1425  private:
1426 
1427   static InjectedField _injected_fields[];
1428 
1429   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1430   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1431   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1432 
1433  public:
1434   enum InjectedFieldID {
1435     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1436     MAX_enum
1437   };
1438 
1439   static int compute_injected_offset(InjectedFieldID id);
1440 
1441   static void compute_hard_coded_offsets();
1442   static void compute_offsets();
1443   static void check_offsets() PRODUCT_RETURN;
1444 
1445   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1446 };
1447 
1448 #undef DECLARE_INJECTED_FIELD_ENUM
1449 
1450 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP