1 /*
   2  * Copyright (c) 1997, 2017, 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 hash_offset;
  57   static int coder_offset;
  58 
  59   static bool initialized;
  60 
  61   static Handle basic_create(int length, bool byte_arr, TRAPS);
  62 
  63   static inline void set_coder(oop string, jbyte coder);
  64 
  65  public:
  66 
  67   // Coders
  68   enum Coder {
  69     CODER_LATIN1 =  0,
  70     CODER_UTF16  =  1
  71   };
  72 
  73   static void compute_offsets();
  74 
  75   // Instance creation
  76   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);
  77   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);
  78   static Handle create_from_str(const char* utf8_str, TRAPS);
  79   static oop    create_oop_from_str(const char* utf8_str, TRAPS);
  80   static Handle create_from_symbol(Symbol* symbol, TRAPS);
  81   static Handle create_from_platform_dependent_str(const char* str, TRAPS);
  82   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);
  83 
  84   static void set_compact_strings(bool value);
  85 
  86   static int value_offset_in_bytes()  {
  87     assert(initialized && (value_offset > 0), "Must be initialized");
  88     return value_offset;
  89   }
  90   static int hash_offset_in_bytes()   {
  91     assert(initialized && (hash_offset > 0), "Must be initialized");
  92     return hash_offset;
  93   }
  94   static int coder_offset_in_bytes()   {
  95     assert(initialized && (coder_offset > 0), "Must be initialized");
  96     return coder_offset;
  97   }
  98 
  99   static inline void set_value_raw(oop string, typeArrayOop buffer);
 100   static inline void set_value(oop string, typeArrayOop buffer);
 101   static inline void set_hash(oop string, unsigned int hash);
 102 
 103   // Accessors
 104   static inline typeArrayOop value(oop java_string);
 105   static inline unsigned int hash(oop java_string);
 106   static inline bool is_latin1(oop java_string);
 107   static inline int length(oop java_string);
 108   static int utf8_length(oop java_string);
 109 
 110   // String converters
 111   static char*  as_utf8_string(oop java_string);
 112   static char*  as_utf8_string(oop java_string, char* buf, int buflen);
 113   static char*  as_utf8_string(oop java_string, int start, int len);
 114   static char*  as_utf8_string(oop java_string, int start, int len, char* buf, int buflen);
 115   static char*  as_platform_dependent_str(Handle java_string, TRAPS);
 116   static jchar* as_unicode_string(oop java_string, int& length, TRAPS);
 117   // produce an ascii string with all other values quoted using \u####
 118   static char*  as_quoted_ascii(oop java_string);
 119 
 120   // Compute the hash value for a java.lang.String object which would
 121   // contain the characters passed in.
 122   //
 123   // As the hash value used by the String object itself, in
 124   // String.hashCode().  This value is normally calculated in Java code
 125   // in the String.hashCode method(), but is precomputed for String
 126   // objects in the shared archive file.
 127   // hash P(31) from Kernighan & Ritchie
 128   //
 129   // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
 130   static unsigned int hash_code(const jchar* s, int len) {
 131     unsigned int h = 0;
 132     while (len-- > 0) {
 133       h = 31*h + (unsigned int) *s;
 134       s++;
 135     }
 136     return h;
 137   }
 138 
 139   static unsigned int hash_code(const jbyte* s, int len) {
 140     unsigned int h = 0;
 141     while (len-- > 0) {
 142       h = 31*h + (((unsigned int) *s) & 0xFF);
 143       s++;
 144     }
 145     return h;
 146   }
 147 
 148   static unsigned int hash_code(oop java_string);
 149 
 150   static bool equals(oop java_string, jchar* chars, int len);
 151   static bool equals(oop str1, oop str2);
 152 
 153   // Conversion between '.' and '/' formats
 154   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }
 155   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }
 156 
 157   // Conversion
 158   static Symbol* as_symbol(oop java_string, TRAPS);
 159   static Symbol* as_symbol_or_null(oop java_string);
 160 
 161   // Testers
 162   static bool is_instance(oop obj);
 163   static inline bool is_instance_inlined(oop obj);
 164 
 165   // Debugging
 166   static void print(oop java_string, outputStream* st);
 167   friend class JavaClasses;
 168   friend class StringTable;
 169 };
 170 
 171 
 172 // Interface to java.lang.Class objects
 173 
 174 #define CLASS_INJECTED_FIELDS(macro)                                       \
 175   macro(java_lang_Class, klass,                  intptr_signature,  false) \
 176   macro(java_lang_Class, array_klass,            intptr_signature,  false) \
 177   macro(java_lang_Class, oop_size,               int_signature,     false) \
 178   macro(java_lang_Class, static_oop_field_count, int_signature,     false) \
 179   macro(java_lang_Class, protection_domain,      object_signature,  false) \
 180   macro(java_lang_Class, signers,                object_signature,  false)
 181 
 182 class java_lang_Class : AllStatic {
 183   friend class VMStructs;
 184   friend class JVMCIVMStructs;
 185 
 186  private:
 187   // The fake offsets are added by the class loader when java.lang.Class is loaded
 188 
 189   static int _klass_offset;
 190   static int _array_klass_offset;
 191 
 192   static int _oop_size_offset;
 193   static int _static_oop_field_count_offset;
 194 
 195   static int _protection_domain_offset;
 196   static int _init_lock_offset;
 197   static int _signers_offset;
 198   static int _class_loader_offset;
 199   static int _module_offset;
 200   static int _component_mirror_offset;
 201 
 202   static bool offsets_computed;
 203   static int classRedefinedCount_offset;
 204 
 205   static GrowableArray<Klass*>* _fixup_mirror_list;
 206   static GrowableArray<Klass*>* _fixup_module_field_list;
 207 
 208   static void set_init_lock(oop java_class, oop init_lock);
 209   static void set_protection_domain(oop java_class, oop protection_domain);
 210   static void set_class_loader(oop java_class, oop class_loader);
 211   static void set_component_mirror(oop java_class, oop comp_mirror);
 212   static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
 213   static void set_mirror_module_field(KlassHandle K, Handle mirror, Handle module, TRAPS);
 214  public:
 215   static void compute_offsets();
 216 
 217   // Instance creation
 218   static void create_mirror(KlassHandle k, Handle class_loader, Handle module,
 219                             Handle protection_domain, TRAPS);
 220   static void fixup_mirror(KlassHandle k, TRAPS);
 221   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);
 222 
 223   static void fixup_module_field(KlassHandle k, Handle module);
 224 
 225   // Conversion
 226   static Klass* as_Klass(oop java_class);
 227   static void set_klass(oop java_class, Klass* klass);
 228   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);
 229   static BasicType as_BasicType(oop java_class, KlassHandle* reference_klass) {
 230     Klass* refk_oop = NULL;
 231     BasicType result = as_BasicType(java_class, &refk_oop);
 232     (*reference_klass) = KlassHandle(refk_oop);
 233     return result;
 234   }
 235   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
 236   static void print_signature(oop java_class, outputStream *st);
 237   static const char* as_external_name(oop java_class);
 238   // Testing
 239   static bool is_instance(oop obj);
 240 
 241   static bool is_primitive(oop java_class);
 242   static BasicType primitive_type(oop java_class);
 243   static oop primitive_mirror(BasicType t);
 244   // JVM_NewArray support
 245   static Klass* array_klass(oop java_class);
 246   static void set_array_klass(oop java_class, Klass* klass);
 247   // compiler support for class operations
 248   static int klass_offset_in_bytes()                { return _klass_offset; }
 249   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }
 250   // Support for classRedefinedCount field
 251   static int classRedefinedCount(oop the_class_mirror);
 252   static void set_classRedefinedCount(oop the_class_mirror, int value);
 253 
 254   // Support for embedded per-class oops
 255   static oop  protection_domain(oop java_class);
 256   static oop  init_lock(oop java_class);
 257   static oop  component_mirror(oop java_class);
 258   static objArrayOop  signers(oop java_class);
 259   static void set_signers(oop java_class, objArrayOop signers);
 260 
 261   static oop class_loader(oop java_class);
 262   static void set_module(oop java_class, oop module);
 263   static oop module(oop java_class);
 264 
 265   static int oop_size(oop java_class);
 266   static void set_oop_size(oop java_class, int size);
 267   static int static_oop_field_count(oop java_class);
 268   static void set_static_oop_field_count(oop java_class, int size);
 269 
 270   static GrowableArray<Klass*>* fixup_mirror_list() {
 271     return _fixup_mirror_list;
 272   }
 273   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {
 274     _fixup_mirror_list = v;
 275   }
 276 
 277   static GrowableArray<Klass*>* fixup_module_field_list() {
 278     return _fixup_module_field_list;
 279   }
 280   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {
 281     _fixup_module_field_list = v;
 282   }
 283 
 284   // Debugging
 285   friend class JavaClasses;
 286   friend class InstanceKlass;   // verification code accesses offsets
 287   friend class ClassFileParser; // access to number_of_fake_fields
 288 };
 289 
 290 // Interface to java.lang.Thread objects
 291 
 292 class java_lang_Thread : AllStatic {
 293  private:
 294   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
 295   // so we compute the offsets at startup rather than hard-wiring them.
 296   static int _name_offset;
 297   static int _group_offset;
 298   static int _contextClassLoader_offset;
 299   static int _inheritedAccessControlContext_offset;
 300   static int _priority_offset;
 301   static int _eetop_offset;
 302   static int _daemon_offset;
 303   static int _stillborn_offset;
 304   static int _stackSize_offset;
 305   static int _tid_offset;
 306   static int _thread_status_offset;
 307   static int _park_blocker_offset;
 308   static int _park_event_offset ;
 309 
 310   static void compute_offsets();
 311 
 312  public:
 313   // Instance creation
 314   static oop create();
 315   // Returns the JavaThread associated with the thread obj
 316   static JavaThread* thread(oop java_thread);
 317   // Set JavaThread for instance
 318   static void set_thread(oop java_thread, JavaThread* thread);
 319   // Name
 320   static oop name(oop java_thread);
 321   static void set_name(oop java_thread, oop name);
 322   // Priority
 323   static ThreadPriority priority(oop java_thread);
 324   static void set_priority(oop java_thread, ThreadPriority priority);
 325   // Thread group
 326   static oop  threadGroup(oop java_thread);
 327   // Stillborn
 328   static bool is_stillborn(oop java_thread);
 329   static void set_stillborn(oop java_thread);
 330   // Alive (NOTE: this is not really a field, but provides the correct
 331   // definition without doing a Java call)
 332   static bool is_alive(oop java_thread);
 333   // Daemon
 334   static bool is_daemon(oop java_thread);
 335   static void set_daemon(oop java_thread);
 336   // Context ClassLoader
 337   static oop context_class_loader(oop java_thread);
 338   // Control context
 339   static oop inherited_access_control_context(oop java_thread);
 340   // Stack size hint
 341   static jlong stackSize(oop java_thread);
 342   // Thread ID
 343   static jlong thread_id(oop java_thread);
 344 
 345   // Blocker object responsible for thread parking
 346   static oop park_blocker(oop java_thread);
 347 
 348   // Pointer to type-stable park handler, encoded as jlong.
 349   // Should be set when apparently null
 350   // For details, see unsafe.cpp Unsafe_Unpark
 351   static jlong park_event(oop java_thread);
 352   static bool set_park_event(oop java_thread, jlong ptr);
 353 
 354   // Java Thread Status for JVMTI and M&M use.
 355   // This thread status info is saved in threadStatus field of
 356   // java.lang.Thread java class.
 357   enum ThreadStatus {
 358     NEW                      = 0,
 359     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running
 360                                JVMTI_THREAD_STATE_RUNNABLE,
 361     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()
 362                                JVMTI_THREAD_STATE_WAITING +
 363                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 364                                JVMTI_THREAD_STATE_SLEEPING,
 365     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()
 366                                JVMTI_THREAD_STATE_WAITING +
 367                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 368                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 369     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)
 370                                JVMTI_THREAD_STATE_WAITING +
 371                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 372                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,
 373     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()
 374                                JVMTI_THREAD_STATE_WAITING +
 375                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +
 376                                JVMTI_THREAD_STATE_PARKED,
 377     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)
 378                                JVMTI_THREAD_STATE_WAITING +
 379                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +
 380                                JVMTI_THREAD_STATE_PARKED,
 381     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block
 382                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,
 383     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED
 384   };
 385   // Write thread status info to threadStatus field of java.lang.Thread.
 386   static void set_thread_status(oop java_thread_oop, ThreadStatus status);
 387   // Read thread status info from threadStatus field of java.lang.Thread.
 388   static ThreadStatus get_thread_status(oop java_thread_oop);
 389 
 390   static const char*  thread_status_name(oop java_thread_oop);
 391 
 392   // Debugging
 393   friend class JavaClasses;
 394 };
 395 
 396 // Interface to java.lang.ThreadGroup objects
 397 
 398 class java_lang_ThreadGroup : AllStatic {
 399  private:
 400   static int _parent_offset;
 401   static int _name_offset;
 402   static int _threads_offset;
 403   static int _groups_offset;
 404   static int _maxPriority_offset;
 405   static int _destroyed_offset;
 406   static int _daemon_offset;
 407   static int _nthreads_offset;
 408   static int _ngroups_offset;
 409 
 410   static void compute_offsets();
 411 
 412  public:
 413   // parent ThreadGroup
 414   static oop  parent(oop java_thread_group);
 415   // name
 416   static const char* name(oop java_thread_group);
 417   // ("name as oop" accessor is not necessary)
 418   // Number of threads in group
 419   static int nthreads(oop java_thread_group);
 420   // threads
 421   static objArrayOop threads(oop java_thread_group);
 422   // Number of threads in group
 423   static int ngroups(oop java_thread_group);
 424   // groups
 425   static objArrayOop groups(oop java_thread_group);
 426   // maxPriority in group
 427   static ThreadPriority maxPriority(oop java_thread_group);
 428   // Destroyed
 429   static bool is_destroyed(oop java_thread_group);
 430   // Daemon
 431   static bool is_daemon(oop java_thread_group);
 432   // Debugging
 433   friend class JavaClasses;
 434 };
 435 
 436 
 437 
 438 // Interface to java.lang.Throwable objects
 439 
 440 class java_lang_Throwable: AllStatic {
 441   friend class BacktraceBuilder;
 442   friend class BacktraceIterator;
 443 
 444  private:
 445   // Offsets
 446   enum {
 447     hc_backtrace_offset     =  0,
 448     hc_detailMessage_offset =  1,
 449     hc_cause_offset         =  2,  // New since 1.4
 450     hc_stackTrace_offset    =  3   // New since 1.4
 451   };
 452   enum {
 453       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7
 454   };
 455   // Trace constants
 456   enum {
 457     trace_methods_offset = 0,
 458     trace_bcis_offset    = 1,
 459     trace_mirrors_offset = 2,
 460     trace_names_offset   = 3,
 461     trace_next_offset    = 4,
 462     trace_size           = 5,
 463     trace_chunk_size     = 32
 464   };
 465 
 466   static int backtrace_offset;
 467   static int detailMessage_offset;
 468   static int stackTrace_offset;
 469   static int depth_offset;
 470   static int static_unassigned_stacktrace_offset;
 471 
 472   // StackTrace (programmatic access, new since 1.4)
 473   static void clear_stacktrace(oop throwable);
 474   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)
 475   static void set_stacktrace(oop throwable, oop st_element_array);
 476   static oop unassigned_stacktrace();
 477 
 478  public:
 479   // Backtrace
 480   static oop backtrace(oop throwable);
 481   static void set_backtrace(oop throwable, oop value);
 482   static int depth(oop throwable);
 483   static void set_depth(oop throwable, int value);
 484   // Needed by JVMTI to filter out this internal field.
 485   static int get_backtrace_offset() { return backtrace_offset;}
 486   static int get_detailMessage_offset() { return detailMessage_offset;}
 487   // Message
 488   static oop message(oop throwable);
 489   static void set_message(oop throwable, oop value);
 490   static Symbol* detail_message(oop throwable);
 491   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);
 492   static void print_stack_usage(Handle stream);
 493 
 494   static void compute_offsets();
 495 
 496   // Allocate space for backtrace (created but stack trace not filled in)
 497   static void allocate_backtrace(Handle throwable, TRAPS);
 498   // Fill in current stack trace for throwable with preallocated backtrace (no GC)
 499   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);
 500   // Fill in current stack trace, can cause GC
 501   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);
 502   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());
 503   // Programmatic access to stack trace
 504   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);
 505   // Printing
 506   static void print(oop throwable, outputStream* st);
 507   static void print_stack_trace(Handle throwable, outputStream* st);
 508   static void java_printStackTrace(Handle throwable, TRAPS);
 509   // Debugging
 510   friend class JavaClasses;
 511 };
 512 
 513 
 514 // Interface to java.lang.reflect.AccessibleObject objects
 515 
 516 class java_lang_reflect_AccessibleObject: AllStatic {
 517  private:
 518   // Note that to reduce dependencies on the JDK we compute these
 519   // offsets at run-time.
 520   static int override_offset;
 521 
 522   static void compute_offsets();
 523 
 524  public:
 525   // Accessors
 526   static jboolean override(oop reflect);
 527   static void set_override(oop reflect, jboolean value);
 528 
 529   // Debugging
 530   friend class JavaClasses;
 531 };
 532 
 533 
 534 // Interface to java.lang.reflect.Method objects
 535 
 536 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {
 537  private:
 538   // Note that to reduce dependencies on the JDK we compute these
 539   // offsets at run-time.
 540   static int clazz_offset;
 541   static int name_offset;
 542   static int returnType_offset;
 543   static int parameterTypes_offset;
 544   static int exceptionTypes_offset;
 545   static int slot_offset;
 546   static int modifiers_offset;
 547   static int signature_offset;
 548   static int annotations_offset;
 549   static int parameter_annotations_offset;
 550   static int annotation_default_offset;
 551   static int type_annotations_offset;
 552 
 553   static void compute_offsets();
 554 
 555  public:
 556   // Allocation
 557   static Handle create(TRAPS);
 558 
 559   // Accessors
 560   static oop clazz(oop reflect);
 561   static void set_clazz(oop reflect, oop value);
 562 
 563   static oop name(oop method);
 564   static void set_name(oop method, oop value);
 565 
 566   static oop return_type(oop method);
 567   static void set_return_type(oop method, oop value);
 568 
 569   static oop parameter_types(oop method);
 570   static void set_parameter_types(oop method, oop value);
 571 
 572   static oop exception_types(oop method);
 573   static void set_exception_types(oop method, oop value);
 574 
 575   static int slot(oop reflect);
 576   static void set_slot(oop reflect, int value);
 577 
 578   static int modifiers(oop method);
 579   static void set_modifiers(oop method, int value);
 580 
 581   static bool has_signature_field();
 582   static oop signature(oop method);
 583   static void set_signature(oop method, oop value);
 584 
 585   static bool has_annotations_field();
 586   static oop annotations(oop method);
 587   static void set_annotations(oop method, oop value);
 588 
 589   static bool has_parameter_annotations_field();
 590   static oop parameter_annotations(oop method);
 591   static void set_parameter_annotations(oop method, oop value);
 592 
 593   static bool has_annotation_default_field();
 594   static oop annotation_default(oop method);
 595   static void set_annotation_default(oop method, oop value);
 596 
 597   static bool has_type_annotations_field();
 598   static oop type_annotations(oop method);
 599   static void set_type_annotations(oop method, oop value);
 600 
 601   // Debugging
 602   friend class JavaClasses;
 603 };
 604 
 605 
 606 // Interface to java.lang.reflect.Constructor objects
 607 
 608 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {
 609  private:
 610   // Note that to reduce dependencies on the JDK we compute these
 611   // offsets at run-time.
 612   static int clazz_offset;
 613   static int parameterTypes_offset;
 614   static int exceptionTypes_offset;
 615   static int slot_offset;
 616   static int modifiers_offset;
 617   static int signature_offset;
 618   static int annotations_offset;
 619   static int parameter_annotations_offset;
 620   static int type_annotations_offset;
 621 
 622   static void compute_offsets();
 623 
 624  public:
 625   // Allocation
 626   static Handle create(TRAPS);
 627 
 628   // Accessors
 629   static oop clazz(oop reflect);
 630   static void set_clazz(oop reflect, oop value);
 631 
 632   static oop parameter_types(oop constructor);
 633   static void set_parameter_types(oop constructor, oop value);
 634 
 635   static oop exception_types(oop constructor);
 636   static void set_exception_types(oop constructor, oop value);
 637 
 638   static int slot(oop reflect);
 639   static void set_slot(oop reflect, int value);
 640 
 641   static int modifiers(oop constructor);
 642   static void set_modifiers(oop constructor, int value);
 643 
 644   static bool has_signature_field();
 645   static oop signature(oop constructor);
 646   static void set_signature(oop constructor, oop value);
 647 
 648   static bool has_annotations_field();
 649   static oop annotations(oop constructor);
 650   static void set_annotations(oop constructor, oop value);
 651 
 652   static bool has_parameter_annotations_field();
 653   static oop parameter_annotations(oop method);
 654   static void set_parameter_annotations(oop method, oop value);
 655 
 656   static bool has_type_annotations_field();
 657   static oop type_annotations(oop constructor);
 658   static void set_type_annotations(oop constructor, oop value);
 659 
 660   // Debugging
 661   friend class JavaClasses;
 662 };
 663 
 664 
 665 // Interface to java.lang.reflect.Field objects
 666 
 667 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {
 668  private:
 669   // Note that to reduce dependencies on the JDK we compute these
 670   // offsets at run-time.
 671   static int clazz_offset;
 672   static int name_offset;
 673   static int type_offset;
 674   static int slot_offset;
 675   static int modifiers_offset;
 676   static int signature_offset;
 677   static int annotations_offset;
 678   static int type_annotations_offset;
 679 
 680   static void compute_offsets();
 681 
 682  public:
 683   // Allocation
 684   static Handle create(TRAPS);
 685 
 686   // Accessors
 687   static oop clazz(oop reflect);
 688   static void set_clazz(oop reflect, oop value);
 689 
 690   static oop name(oop field);
 691   static void set_name(oop field, oop value);
 692 
 693   static oop type(oop field);
 694   static void set_type(oop field, oop value);
 695 
 696   static int slot(oop reflect);
 697   static void set_slot(oop reflect, int value);
 698 
 699   static int modifiers(oop field);
 700   static void set_modifiers(oop field, int value);
 701 
 702   static bool has_signature_field();
 703   static oop signature(oop constructor);
 704   static void set_signature(oop constructor, oop value);
 705 
 706   static bool has_annotations_field();
 707   static oop annotations(oop constructor);
 708   static void set_annotations(oop constructor, oop value);
 709 
 710   static bool has_parameter_annotations_field();
 711   static oop parameter_annotations(oop method);
 712   static void set_parameter_annotations(oop method, oop value);
 713 
 714   static bool has_annotation_default_field();
 715   static oop annotation_default(oop method);
 716   static void set_annotation_default(oop method, oop value);
 717 
 718   static bool has_type_annotations_field();
 719   static oop type_annotations(oop field);
 720   static void set_type_annotations(oop field, oop value);
 721 
 722   // Debugging
 723   friend class JavaClasses;
 724 };
 725 
 726 class java_lang_reflect_Parameter {
 727  private:
 728   // Note that to reduce dependencies on the JDK we compute these
 729   // offsets at run-time.
 730   static int name_offset;
 731   static int modifiers_offset;
 732   static int index_offset;
 733   static int executable_offset;
 734 
 735   static void compute_offsets();
 736 
 737  public:
 738   // Allocation
 739   static Handle create(TRAPS);
 740 
 741   // Accessors
 742   static oop name(oop field);
 743   static void set_name(oop field, oop value);
 744 
 745   static int index(oop reflect);
 746   static void set_index(oop reflect, int value);
 747 
 748   static int modifiers(oop reflect);
 749   static void set_modifiers(oop reflect, int value);
 750 
 751   static oop executable(oop constructor);
 752   static void set_executable(oop constructor, oop value);
 753 
 754   friend class JavaClasses;
 755 };
 756 
 757 #define MODULE_INJECTED_FIELDS(macro)                            \
 758   macro(java_lang_reflect_Module, module_entry, intptr_signature, false)
 759 
 760 class java_lang_reflect_Module {
 761   private:
 762     static int loader_offset;
 763     static int name_offset;
 764     static int _module_entry_offset;
 765     static void compute_offsets();
 766 
 767   public:
 768     // Allocation
 769     static Handle create(Handle loader, Handle module_name, TRAPS);
 770 
 771     // Testers
 772     static bool is_instance(oop obj);
 773 
 774     // Accessors
 775     static oop loader(oop module);
 776     static void set_loader(oop module, oop value);
 777 
 778     static oop name(oop module);
 779     static void set_name(oop module, oop value);
 780 
 781     static ModuleEntry* module_entry(oop module, TRAPS);
 782     static void set_module_entry(oop module, ModuleEntry* module_entry);
 783 
 784   friend class JavaClasses;
 785 };
 786 
 787 // Interface to jdk.internal.reflect.ConstantPool objects
 788 class reflect_ConstantPool {
 789  private:
 790   // Note that to reduce dependencies on the JDK we compute these
 791   // offsets at run-time.
 792   static int _oop_offset;
 793 
 794   static void compute_offsets();
 795 
 796  public:
 797   // Allocation
 798   static Handle create(TRAPS);
 799 
 800   // Accessors
 801   static void set_cp(oop reflect, ConstantPool* value);
 802   static int oop_offset() {
 803     return _oop_offset;
 804   }
 805 
 806   static ConstantPool* get_cp(oop reflect);
 807 
 808   // Debugging
 809   friend class JavaClasses;
 810 };
 811 
 812 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects
 813 class reflect_UnsafeStaticFieldAccessorImpl {
 814  private:
 815   static int _base_offset;
 816   static void compute_offsets();
 817 
 818  public:
 819   static int base_offset() {
 820     return _base_offset;
 821   }
 822 
 823   // Debugging
 824   friend class JavaClasses;
 825 };
 826 
 827 // Interface to java.lang primitive type boxing objects:
 828 //  - java.lang.Boolean
 829 //  - java.lang.Character
 830 //  - java.lang.Float
 831 //  - java.lang.Double
 832 //  - java.lang.Byte
 833 //  - java.lang.Short
 834 //  - java.lang.Integer
 835 //  - java.lang.Long
 836 
 837 // This could be separated out into 8 individual classes.
 838 
 839 class java_lang_boxing_object: AllStatic {
 840  private:
 841   enum {
 842    hc_value_offset = 0
 843   };
 844   static int value_offset;
 845   static int long_value_offset;
 846 
 847   static oop initialize_and_allocate(BasicType type, TRAPS);
 848  public:
 849   // Allocation. Returns a boxed value, or NULL for invalid type.
 850   static oop create(BasicType type, jvalue* value, TRAPS);
 851   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
 852   static BasicType get_value(oop box, jvalue* value);
 853   static BasicType set_value(oop box, jvalue* value);
 854   static BasicType basic_type(oop box);
 855   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }
 856   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
 857   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }
 858   static void print(BasicType type, jvalue* value, outputStream* st);
 859 
 860   static int value_offset_in_bytes(BasicType type) {
 861     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :
 862                                                     value_offset;
 863   }
 864 
 865   // Debugging
 866   friend class JavaClasses;
 867 };
 868 
 869 
 870 
 871 // Interface to java.lang.ref.Reference objects
 872 
 873 class java_lang_ref_Reference: AllStatic {
 874  public:
 875   enum {
 876    hc_referent_offset   = 0,
 877    hc_queue_offset      = 1,
 878    hc_next_offset       = 2,
 879    hc_discovered_offset = 3  // Is not last, see SoftRefs.
 880   };
 881 
 882   static int referent_offset;
 883   static int queue_offset;
 884   static int next_offset;
 885   static int discovered_offset;
 886   static int number_of_fake_oop_fields;
 887 
 888   // Accessors
 889   static inline oop referent(oop ref);
 890   static inline void set_referent(oop ref, oop value);
 891   static inline void set_referent_raw(oop ref, oop value);
 892   static inline HeapWord* referent_addr(oop ref);
 893   static inline oop next(oop ref);
 894   static inline void set_next(oop ref, oop value);
 895   static inline void set_next_raw(oop ref, oop value);
 896   static inline HeapWord* next_addr(oop ref);
 897   static inline oop discovered(oop ref);
 898   static inline void set_discovered(oop ref, oop value);
 899   static inline void set_discovered_raw(oop ref, oop value);
 900   static inline HeapWord* discovered_addr(oop ref);
 901 };
 902 
 903 
 904 // Interface to java.lang.ref.SoftReference objects
 905 
 906 class java_lang_ref_SoftReference: public java_lang_ref_Reference {
 907  public:
 908   enum {
 909    // The timestamp is a long field and may need to be adjusted for alignment.
 910    hc_timestamp_offset  = hc_discovered_offset + 1
 911   };
 912   enum {
 913    hc_static_clock_offset = 0
 914   };
 915 
 916   static int timestamp_offset;
 917   static int static_clock_offset;
 918 
 919   // Accessors
 920   static jlong timestamp(oop ref);
 921 
 922   // Accessors for statics
 923   static jlong clock();
 924   static void set_clock(jlong value);
 925 };
 926 
 927 // Interface to java.lang.invoke.MethodHandle objects
 928 
 929 class MethodHandleEntry;
 930 
 931 class java_lang_invoke_MethodHandle: AllStatic {
 932   friend class JavaClasses;
 933 
 934  private:
 935   static int _type_offset;               // the MethodType of this MH
 936   static int _form_offset;               // the LambdaForm of this MH
 937 
 938   static void compute_offsets();
 939 
 940  public:
 941   // Accessors
 942   static oop            type(oop mh);
 943   static void       set_type(oop mh, oop mtype);
 944 
 945   static oop            form(oop mh);
 946   static void       set_form(oop mh, oop lform);
 947 
 948   // Testers
 949   static bool is_subclass(Klass* klass) {
 950     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());
 951   }
 952   static bool is_instance(oop obj);
 953 
 954   // Accessors for code generation:
 955   static int type_offset_in_bytes()             { return _type_offset; }
 956   static int form_offset_in_bytes()             { return _form_offset; }
 957 };
 958 
 959 // Interface to java.lang.invoke.DirectMethodHandle objects
 960 
 961 class java_lang_invoke_DirectMethodHandle: AllStatic {
 962   friend class JavaClasses;
 963 
 964  private:
 965   static int _member_offset;               // the MemberName of this DMH
 966 
 967   static void compute_offsets();
 968 
 969  public:
 970   // Accessors
 971   static oop  member(oop mh);
 972 
 973   // Testers
 974   static bool is_subclass(Klass* klass) {
 975     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());
 976   }
 977   static bool is_instance(oop obj);
 978 
 979   // Accessors for code generation:
 980   static int member_offset_in_bytes()           { return _member_offset; }
 981 };
 982 
 983 // Interface to java.lang.invoke.LambdaForm objects
 984 // (These are a private interface for managing adapter code generation.)
 985 
 986 class java_lang_invoke_LambdaForm: AllStatic {
 987   friend class JavaClasses;
 988 
 989  private:
 990   static int _vmentry_offset;  // type is MemberName
 991 
 992   static void compute_offsets();
 993 
 994  public:
 995   // Accessors
 996   static oop            vmentry(oop lform);
 997   static void       set_vmentry(oop lform, oop invoker);
 998 
 999   // Testers
1000   static bool is_subclass(Klass* klass) {
1001     return SystemDictionary::LambdaForm_klass() != NULL &&
1002       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());
1003   }
1004   static bool is_instance(oop obj);
1005 
1006   // Accessors for code generation:
1007   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }
1008 };
1009 
1010 
1011 // Interface to java.lang.invoke.MemberName objects
1012 // (These are a private interface for Java code to query the class hierarchy.)
1013 
1014 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \
1015   macro(java_lang_invoke_MemberName, vmloader, object_signature, false) \
1016   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false) \
1017   macro(java_lang_invoke_MemberName, vmtarget, intptr_signature, false)
1018 
1019 class java_lang_invoke_MemberName: AllStatic {
1020   friend class JavaClasses;
1021 
1022  private:
1023   // From java.lang.invoke.MemberName:
1024   //    private Class<?>   clazz;       // class in which the method is defined
1025   //    private String     name;        // may be null if not yet materialized
1026   //    private Object     type;        // may be null if not yet materialized
1027   //    private int        flags;       // modifier bits; see reflect.Modifier
1028   //    private intptr     vmtarget;    // VM-specific target value
1029   //    private intptr_t   vmindex;     // member index within class or interface
1030   static int _clazz_offset;
1031   static int _name_offset;
1032   static int _type_offset;
1033   static int _flags_offset;
1034   static int _vmtarget_offset;
1035   static int _vmloader_offset;
1036   static int _vmindex_offset;
1037 
1038   static void compute_offsets();
1039 
1040  public:
1041   // Accessors
1042   static oop            clazz(oop mname);
1043   static void       set_clazz(oop mname, oop clazz);
1044 
1045   static oop            type(oop mname);
1046   static void       set_type(oop mname, oop type);
1047 
1048   static oop            name(oop mname);
1049   static void       set_name(oop mname, oop name);
1050 
1051   static int            flags(oop mname);
1052   static void       set_flags(oop mname, int flags);
1053 
1054   static Metadata*      vmtarget(oop mname);
1055   static void       set_vmtarget(oop mname, Metadata* target);
1056 
1057   static intptr_t       vmindex(oop mname);
1058   static void       set_vmindex(oop mname, intptr_t index);
1059 
1060   // Testers
1061   static bool is_subclass(Klass* klass) {
1062     return klass->is_subclass_of(SystemDictionary::MemberName_klass());
1063   }
1064   static bool is_instance(oop obj);
1065 
1066   static bool is_method(oop obj);
1067 
1068   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):
1069   enum {
1070     MN_IS_METHOD            = 0x00010000, // method (not constructor)
1071     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor
1072     MN_IS_FIELD             = 0x00040000, // field
1073     MN_IS_TYPE              = 0x00080000, // nested type
1074     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected
1075     MN_REFERENCE_KIND_SHIFT = 24, // refKind
1076     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,
1077     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:
1078     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes
1079     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces
1080   };
1081 
1082   // Accessors for code generation:
1083   static int clazz_offset_in_bytes()            { return _clazz_offset; }
1084   static int type_offset_in_bytes()             { return _type_offset; }
1085   static int name_offset_in_bytes()             { return _name_offset; }
1086   static int flags_offset_in_bytes()            { return _flags_offset; }
1087   static int vmtarget_offset_in_bytes()         { return _vmtarget_offset; }
1088   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }
1089 };
1090 
1091 
1092 // Interface to java.lang.invoke.MethodType objects
1093 
1094 class java_lang_invoke_MethodType: AllStatic {
1095   friend class JavaClasses;
1096 
1097  private:
1098   static int _rtype_offset;
1099   static int _ptypes_offset;
1100 
1101   static void compute_offsets();
1102 
1103  public:
1104   // Accessors
1105   static oop            rtype(oop mt);
1106   static objArrayOop    ptypes(oop mt);
1107 
1108   static oop            ptype(oop mt, int index);
1109   static int            ptype_count(oop mt);
1110 
1111   static int            ptype_slot_count(oop mt);  // extra counts for long/double
1112   static int            rtype_slot_count(oop mt);  // extra counts for long/double
1113 
1114   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);
1115   static void           print_signature(oop mt, outputStream* st);
1116 
1117   static bool is_instance(oop obj);
1118 
1119   static bool equals(oop mt1, oop mt2);
1120 
1121   // Accessors for code generation:
1122   static int rtype_offset_in_bytes()            { return _rtype_offset; }
1123   static int ptypes_offset_in_bytes()           { return _ptypes_offset; }
1124 };
1125 
1126 
1127 // Interface to java.lang.invoke.CallSite objects
1128 
1129 class java_lang_invoke_CallSite: AllStatic {
1130   friend class JavaClasses;
1131 
1132 private:
1133   static int _target_offset;
1134   static int _context_offset;
1135 
1136   static void compute_offsets();
1137 
1138 public:
1139   // Accessors
1140   static oop              target(          oop site);
1141   static void         set_target(          oop site, oop target);
1142   static void         set_target_volatile( oop site, oop target);
1143 
1144   static oop              context(oop site);
1145 
1146   // Testers
1147   static bool is_subclass(Klass* klass) {
1148     return klass->is_subclass_of(SystemDictionary::CallSite_klass());
1149   }
1150   static bool is_instance(oop obj);
1151 
1152   // Accessors for code generation:
1153   static int target_offset_in_bytes()           { return _target_offset; }
1154 };
1155 
1156 // Interface to java.lang.invoke.MethodHandleNatives$CallSiteContext objects
1157 
1158 #define CALLSITECONTEXT_INJECTED_FIELDS(macro) \
1159   macro(java_lang_invoke_MethodHandleNatives_CallSiteContext, vmdependencies, intptr_signature, false)
1160 
1161 class DependencyContext;
1162 
1163 class java_lang_invoke_MethodHandleNatives_CallSiteContext : AllStatic {
1164   friend class JavaClasses;
1165 
1166 private:
1167   static int _vmdependencies_offset;
1168 
1169   static void compute_offsets();
1170 
1171 public:
1172   // Accessors
1173   static DependencyContext vmdependencies(oop context);
1174 
1175   // Testers
1176   static bool is_subclass(Klass* klass) {
1177     return klass->is_subclass_of(SystemDictionary::Context_klass());
1178   }
1179   static bool is_instance(oop obj);
1180 };
1181 
1182 // Interface to java.security.AccessControlContext objects
1183 
1184 class java_security_AccessControlContext: AllStatic {
1185  private:
1186   // Note that for this class the layout changed between JDK1.2 and JDK1.3,
1187   // so we compute the offsets at startup rather than hard-wiring them.
1188   static int _context_offset;
1189   static int _privilegedContext_offset;
1190   static int _isPrivileged_offset;
1191   static int _isAuthorized_offset;
1192 
1193   static void compute_offsets();
1194  public:
1195   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);
1196 
1197   static bool is_authorized(Handle context);
1198 
1199   // Debugging/initialization
1200   friend class JavaClasses;
1201 };
1202 
1203 
1204 // Interface to java.lang.ClassLoader objects
1205 
1206 #define CLASSLOADER_INJECTED_FIELDS(macro)                            \
1207   macro(java_lang_ClassLoader, loader_data,  intptr_signature, false)
1208 
1209 class java_lang_ClassLoader : AllStatic {
1210  private:
1211   // The fake offsets are added by the class loader when java.lang.Class is loaded
1212   enum {
1213    hc_parent_offset = 0
1214   };
1215   static int _loader_data_offset;
1216   static bool offsets_computed;
1217   static int parent_offset;
1218   static int parallelCapable_offset;
1219   static int name_offset;
1220   static int unnamedModule_offset;
1221 
1222  public:
1223   static void compute_offsets();
1224 
1225   static ClassLoaderData** loader_data_addr(oop loader);
1226   static ClassLoaderData* loader_data(oop loader);
1227 
1228   static oop parent(oop loader);
1229   static oop name(oop loader);
1230   static bool isAncestor(oop loader, oop cl);
1231 
1232   // Support for parallelCapable field
1233   static bool parallelCapable(oop the_class_mirror);
1234 
1235   static bool is_trusted_loader(oop loader);
1236 
1237   // Return true if this is one of the class loaders associated with
1238   // the generated bytecodes for reflection.
1239   static bool is_reflection_class_loader(oop loader);
1240 
1241   // Fix for 4474172
1242   static oop  non_reflection_class_loader(oop loader);
1243 
1244   // Testers
1245   static bool is_subclass(Klass* klass) {
1246     return klass->is_subclass_of(SystemDictionary::ClassLoader_klass());
1247   }
1248   static bool is_instance(oop obj);
1249 
1250   static oop unnamedModule(oop loader);
1251 
1252   // Debugging
1253   friend class JavaClasses;
1254   friend class ClassFileParser; // access to number_of_fake_fields
1255 };
1256 
1257 
1258 // Interface to java.lang.System objects
1259 
1260 class java_lang_System : AllStatic {
1261  private:
1262   enum {
1263    hc_static_in_offset  = 0,
1264    hc_static_out_offset = 1,
1265    hc_static_err_offset = 2,
1266    hc_static_security_offset = 3
1267   };
1268 
1269   static int  static_in_offset;
1270   static int static_out_offset;
1271   static int static_err_offset;
1272   static int static_security_offset;
1273 
1274  public:
1275   static int  in_offset_in_bytes();
1276   static int out_offset_in_bytes();
1277   static int err_offset_in_bytes();
1278 
1279   static bool has_security_manager();
1280 
1281   // Debugging
1282   friend class JavaClasses;
1283 };
1284 
1285 
1286 // Interface to java.lang.StackTraceElement objects
1287 
1288 class java_lang_StackTraceElement: AllStatic {
1289  private:
1290   enum {
1291     hc_declaringClassObject_offset    = 0,
1292     hc_classLoaderName_offset      = 1,
1293     hc_moduleName_offset           = 2,
1294     hc_moduleVersion_offset        = 3,
1295     hc_declaringClass_offset       = 4,
1296     hc_methodName_offset           = 5,
1297     hc_fileName_offset             = 6,
1298     hc_lineNumber_offset           = 7
1299   };
1300 
1301   static int declaringClassObject_offset;
1302   static int classLoaderName_offset;
1303   static int moduleName_offset;
1304   static int moduleVersion_offset;
1305   static int declaringClass_offset;
1306   static int methodName_offset;
1307   static int fileName_offset;
1308   static int lineNumber_offset;
1309 
1310   // Setters
1311   static void set_classLoaderName(oop element, oop value);
1312   static void set_moduleName(oop element, oop value);
1313   static void set_moduleVersion(oop element, oop value);
1314   static void set_declaringClass(oop element, oop value);
1315   static void set_methodName(oop element, oop value);
1316   static void set_fileName(oop element, oop value);
1317   static void set_lineNumber(oop element, int value);
1318   static void set_declaringClassObject(oop element, oop value);
1319 
1320  public:
1321   // Create an instance of StackTraceElement
1322   static oop create(const methodHandle& method, int bci, TRAPS);
1323 
1324   static void fill_in(Handle element, InstanceKlass* holder, const methodHandle& method,
1325                       int version, int bci, Symbol* name, TRAPS);
1326 
1327   // Debugging
1328   friend class JavaClasses;
1329 };
1330 
1331 
1332 class Backtrace: AllStatic {
1333  public:
1334   // Helper backtrace functions to store bci|version together.
1335   static int merge_bci_and_version(int bci, int version);
1336   static int merge_mid_and_cpref(int mid, int cpref);
1337   static int bci_at(unsigned int merged);
1338   static int version_at(unsigned int merged);
1339   static int mid_at(unsigned int merged);
1340   static int cpref_at(unsigned int merged);
1341   static int get_line_number(const methodHandle& method, int bci);
1342   static Symbol* get_source_file_name(InstanceKlass* holder, int version);
1343 
1344   // Debugging
1345   friend class JavaClasses;
1346 };
1347 
1348 // Interface to java.lang.StackFrameInfo objects
1349 
1350 #define STACKFRAMEINFO_INJECTED_FIELDS(macro)                      \
1351   macro(java_lang_StackFrameInfo, version, short_signature, false)
1352 
1353 class java_lang_StackFrameInfo: AllStatic {
1354 private:
1355   static int _declaringClass_offset;
1356   static int _memberName_offset;
1357   static int _bci_offset;
1358   static int _version_offset;
1359 
1360   static Method* get_method(Handle stackFrame, InstanceKlass* holder, TRAPS);
1361 
1362 public:
1363   // Setters
1364   static void set_declaringClass(oop info, oop value);
1365   static void set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci);
1366   static void set_bci(oop info, int value);
1367 
1368   static void set_version(oop info, short value);
1369 
1370   static void compute_offsets();
1371 
1372   static void to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS);
1373 
1374   // Debugging
1375   friend class JavaClasses;
1376 };
1377 
1378 class java_lang_LiveStackFrameInfo: AllStatic {
1379  private:
1380   static int _monitors_offset;
1381   static int _locals_offset;
1382   static int _operands_offset;
1383   static int _mode_offset;
1384 
1385  public:
1386   static void set_monitors(oop info, oop value);
1387   static void set_locals(oop info, oop value);
1388   static void set_operands(oop info, oop value);
1389   static void set_mode(oop info, int value);
1390 
1391   static void compute_offsets();
1392 
1393   // Debugging
1394   friend class JavaClasses;
1395 };
1396 
1397 // Interface to java.lang.AssertionStatusDirectives objects
1398 
1399 class java_lang_AssertionStatusDirectives: AllStatic {
1400  private:
1401   enum {
1402     hc_classes_offset,
1403     hc_classEnabled_offset,
1404     hc_packages_offset,
1405     hc_packageEnabled_offset,
1406     hc_deflt_offset
1407   };
1408 
1409   static int classes_offset;
1410   static int classEnabled_offset;
1411   static int packages_offset;
1412   static int packageEnabled_offset;
1413   static int deflt_offset;
1414 
1415  public:
1416   // Setters
1417   static void set_classes(oop obj, oop val);
1418   static void set_classEnabled(oop obj, oop val);
1419   static void set_packages(oop obj, oop val);
1420   static void set_packageEnabled(oop obj, oop val);
1421   static void set_deflt(oop obj, bool val);
1422   // Debugging
1423   friend class JavaClasses;
1424 };
1425 
1426 
1427 class java_nio_Buffer: AllStatic {
1428  private:
1429   static int _limit_offset;
1430 
1431  public:
1432   static int  limit_offset();
1433   static void compute_offsets();
1434 };
1435 
1436 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {
1437  private:
1438   static int  _owner_offset;
1439  public:
1440   static void initialize(TRAPS);
1441   static oop  get_owner_threadObj(oop obj);
1442 };
1443 
1444 // Use to declare fields that need to be injected into Java classes
1445 // for the JVM to use.  The name_index and signature_index are
1446 // declared in vmSymbols.  The may_be_java flag is used to declare
1447 // fields that might already exist in Java but should be injected if
1448 // they don't.  Otherwise the field is unconditionally injected and
1449 // the JVM uses the injected one.  This is to ensure that name
1450 // collisions don't occur.  In general may_be_java should be false
1451 // unless there's a good reason.
1452 
1453 class InjectedField {
1454  public:
1455   const SystemDictionary::WKID klass_id;
1456   const vmSymbols::SID name_index;
1457   const vmSymbols::SID signature_index;
1458   const bool           may_be_java;
1459 
1460 
1461   Klass* klass() const    { return SystemDictionary::well_known_klass(klass_id); }
1462   Symbol* name() const      { return lookup_symbol(name_index); }
1463   Symbol* signature() const { return lookup_symbol(signature_index); }
1464 
1465   int compute_offset();
1466 
1467   // Find the Symbol for this index
1468   static Symbol* lookup_symbol(int symbol_index) {
1469     return vmSymbols::symbol_at((vmSymbols::SID)symbol_index);
1470   }
1471 };
1472 
1473 #define DECLARE_INJECTED_FIELD_ENUM(klass, name, signature, may_be_java) \
1474   klass##_##name##_enum,
1475 
1476 #define ALL_INJECTED_FIELDS(macro)          \
1477   CLASS_INJECTED_FIELDS(macro)              \
1478   CLASSLOADER_INJECTED_FIELDS(macro)        \
1479   MEMBERNAME_INJECTED_FIELDS(macro)         \
1480   CALLSITECONTEXT_INJECTED_FIELDS(macro)    \
1481   STACKFRAMEINFO_INJECTED_FIELDS(macro)     \
1482   MODULE_INJECTED_FIELDS(macro)
1483 
1484 // Interface to hard-coded offset checking
1485 
1486 class JavaClasses : AllStatic {
1487  private:
1488 
1489   static InjectedField _injected_fields[];
1490 
1491   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1492   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1493   static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
1494 
1495  public:
1496   enum InjectedFieldID {
1497     ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD_ENUM)
1498     MAX_enum
1499   };
1500 
1501   static int compute_injected_offset(InjectedFieldID id);
1502 
1503   static void compute_hard_coded_offsets();
1504   static void compute_offsets();
1505   static void check_offsets() PRODUCT_RETURN;
1506 
1507   static InjectedField* get_injected(Symbol* class_name, int* field_count);
1508 };
1509 
1510 #undef DECLARE_INJECTED_FIELD_ENUM
1511 
1512 #endif // SHARE_VM_CLASSFILE_JAVACLASSES_HPP