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