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(Klass* k, Handle mirror, Handle protection_domain, TRAPS);

   213   static void set_mirror_module_field(Klass* K, Handle mirror, Handle module, TRAPS);

   214  public:

   215   static void allocate_fixup_lists();

   216   static void compute_offsets();

   217 

   218   // Instance creation

   219   static void create_mirror(Klass* k, Handle class_loader, Handle module,

   220                             Handle protection_domain, TRAPS);

   221   static void fixup_mirror(Klass* k, TRAPS);

   222   static oop  create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS);

   223 

   224   static void fixup_module_field(Klass* k, Handle module);

   225 

   226   // Conversion

   227   static Klass* as_Klass(oop java_class);

   228   static void set_klass(oop java_class, Klass* klass);

   229   static BasicType as_BasicType(oop java_class, Klass** reference_klass = NULL);

   230   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);

   231   static void print_signature(oop java_class, outputStream *st);

   232   static const char* as_external_name(oop java_class);

   233   // Testing

   234   static bool is_instance(oop obj);

   235 

   236   static bool is_primitive(oop java_class);

   237   static BasicType primitive_type(oop java_class);

   238   static oop primitive_mirror(BasicType t);

   239   // JVM_NewArray support

   240   static Klass* array_klass_acquire(oop java_class);

   241   static void release_set_array_klass(oop java_class, Klass* klass);

   242   // compiler support for class operations

   243   static int klass_offset_in_bytes()                { return _klass_offset; }

   244   static int array_klass_offset_in_bytes()          { return _array_klass_offset; }

   245   // Support for classRedefinedCount field

   246   static int classRedefinedCount(oop the_class_mirror);

   247   static void set_classRedefinedCount(oop the_class_mirror, int value);

   248 

   249   // Support for embedded per-class oops

   250   static oop  protection_domain(oop java_class);

   251   static oop  init_lock(oop java_class);

   252   static oop  component_mirror(oop java_class);

   253   static objArrayOop  signers(oop java_class);

   254   static void set_signers(oop java_class, objArrayOop signers);

   255 

   256   static oop class_loader(oop java_class);

   257   static void set_module(oop java_class, oop module);

   258   static oop module(oop java_class);

   259 

   260   static int oop_size(oop java_class);

   261   static void set_oop_size(oop java_class, int size);

   262   static int static_oop_field_count(oop java_class);

   263   static void set_static_oop_field_count(oop java_class, int size);

   264 

   265   static GrowableArray<Klass*>* fixup_mirror_list() {

   266     return _fixup_mirror_list;

   267   }

   268   static void set_fixup_mirror_list(GrowableArray<Klass*>* v) {

   269     _fixup_mirror_list = v;

   270   }

   271 

   272   static GrowableArray<Klass*>* fixup_module_field_list() {

   273     return _fixup_module_field_list;

   274   }

   275   static void set_fixup_module_field_list(GrowableArray<Klass*>* v) {

   276     _fixup_module_field_list = v;

   277   }

   278 

   279   // Debugging

   280   friend class JavaClasses;

   281   friend class InstanceKlass;   // verification code accesses offsets

   282   friend class ClassFileParser; // access to number_of_fake_fields

   283 };

   284 

   285 // Interface to java.lang.Thread objects

   286 

   287 class java_lang_Thread : AllStatic {

   288  private:

   289   // Note that for this class the layout changed between JDK1.2 and JDK1.3,

   290   // so we compute the offsets at startup rather than hard-wiring them.

   291   static int _name_offset;

   292   static int _group_offset;

   293   static int _contextClassLoader_offset;

   294   static int _inheritedAccessControlContext_offset;

   295   static int _priority_offset;

   296   static int _eetop_offset;

   297   static int _daemon_offset;

   298   static int _stillborn_offset;

   299   static int _stackSize_offset;

   300   static int _tid_offset;

   301   static int _thread_status_offset;

   302   static int _park_blocker_offset;

   303   static int _park_event_offset ;

   304 

   305   static void compute_offsets();

   306 

   307  public:

   308   // Instance creation

   309   static oop create();

   310   // Returns the JavaThread associated with the thread obj

   311   static JavaThread* thread(oop java_thread);

   312   // Set JavaThread for instance

   313   static void set_thread(oop java_thread, JavaThread* thread);

   314   // Name

   315   static oop name(oop java_thread);

   316   static void set_name(oop java_thread, oop name);

   317   // Priority

   318   static ThreadPriority priority(oop java_thread);

   319   static void set_priority(oop java_thread, ThreadPriority priority);

   320   // Thread group

   321   static oop  threadGroup(oop java_thread);

   322   // Stillborn

   323   static bool is_stillborn(oop java_thread);

   324   static void set_stillborn(oop java_thread);

   325   // Alive (NOTE: this is not really a field, but provides the correct

   326   // definition without doing a Java call)

   327   static bool is_alive(oop java_thread);

   328   // Daemon

   329   static bool is_daemon(oop java_thread);

   330   static void set_daemon(oop java_thread);

   331   // Context ClassLoader

   332   static oop context_class_loader(oop java_thread);

   333   // Control context

   334   static oop inherited_access_control_context(oop java_thread);

   335   // Stack size hint

   336   static jlong stackSize(oop java_thread);

   337   // Thread ID

   338   static jlong thread_id(oop java_thread);

   339 

   340   // Blocker object responsible for thread parking

   341   static oop park_blocker(oop java_thread);

   342 

   343   // Pointer to type-stable park handler, encoded as jlong.

   344   // Should be set when apparently null

   345   // For details, see unsafe.cpp Unsafe_Unpark

   346   static jlong park_event(oop java_thread);

   347   static bool set_park_event(oop java_thread, jlong ptr);

   348 

   349   // Java Thread Status for JVMTI and M&M use.

   350   // This thread status info is saved in threadStatus field of

   351   // java.lang.Thread java class.

   352   enum ThreadStatus {

   353     NEW                      = 0,

   354     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running

   355                                JVMTI_THREAD_STATE_RUNNABLE,

   356     SLEEPING                 = JVMTI_THREAD_STATE_ALIVE +          // Thread.sleep()

   357                                JVMTI_THREAD_STATE_WAITING +

   358                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   359                                JVMTI_THREAD_STATE_SLEEPING,

   360     IN_OBJECT_WAIT           = JVMTI_THREAD_STATE_ALIVE +          // Object.wait()

   361                                JVMTI_THREAD_STATE_WAITING +

   362                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +

   363                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,

   364     IN_OBJECT_WAIT_TIMED     = JVMTI_THREAD_STATE_ALIVE +          // Object.wait(long)

   365                                JVMTI_THREAD_STATE_WAITING +

   366                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   367                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,

   368     PARKED                   = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park()

   369                                JVMTI_THREAD_STATE_WAITING +

   370                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +

   371                                JVMTI_THREAD_STATE_PARKED,

   372     PARKED_TIMED             = JVMTI_THREAD_STATE_ALIVE +          // LockSupport.park(long)

   373                                JVMTI_THREAD_STATE_WAITING +

   374                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   375                                JVMTI_THREAD_STATE_PARKED,

   376     BLOCKED_ON_MONITOR_ENTER = JVMTI_THREAD_STATE_ALIVE +          // (re-)entering a synchronization block

   377                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,

   378     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED

   379   };

   380   // Write thread status info to threadStatus field of java.lang.Thread.

   381   static void set_thread_status(oop java_thread_oop, ThreadStatus status);

   382   // Read thread status info from threadStatus field of java.lang.Thread.

   383   static ThreadStatus get_thread_status(oop java_thread_oop);

   384 

   385   static const char*  thread_status_name(oop java_thread_oop);

   386 

   387   // Debugging

   388   friend class JavaClasses;

   389 };

   390 

   391 // Interface to java.lang.ThreadGroup objects

   392 

   393 class java_lang_ThreadGroup : AllStatic {

   394  private:

   395   static int _parent_offset;

   396   static int _name_offset;

   397   static int _threads_offset;

   398   static int _groups_offset;

   399   static int _maxPriority_offset;

   400   static int _destroyed_offset;

   401   static int _daemon_offset;

   402   static int _nthreads_offset;

   403   static int _ngroups_offset;

   404 

   405   static void compute_offsets();

   406 

   407  public:

   408   // parent ThreadGroup

   409   static oop  parent(oop java_thread_group);

   410   // name

   411   static const char* name(oop java_thread_group);

   412   // ("name as oop" accessor is not necessary)

   413   // Number of threads in group

   414   static int nthreads(oop java_thread_group);

   415   // threads

   416   static objArrayOop threads(oop java_thread_group);

   417   // Number of threads in group

   418   static int ngroups(oop java_thread_group);

   419   // groups

   420   static objArrayOop groups(oop java_thread_group);

   421   // maxPriority in group

   422   static ThreadPriority maxPriority(oop java_thread_group);

   423   // Destroyed

   424   static bool is_destroyed(oop java_thread_group);

   425   // Daemon

   426   static bool is_daemon(oop java_thread_group);

   427   // Debugging

   428   friend class JavaClasses;

   429 };

   430 

   431 

   432 

   433 // Interface to java.lang.Throwable objects

   434 

   435 class java_lang_Throwable: AllStatic {

   436   friend class BacktraceBuilder;

   437   friend class BacktraceIterator;

   438 

   439  private:

   440   // Offsets

   441   enum {

   442     hc_backtrace_offset     =  0,

   443     hc_detailMessage_offset =  1,

   444     hc_cause_offset         =  2,  // New since 1.4

   445     hc_stackTrace_offset    =  3   // New since 1.4

   446   };

   447   enum {

   448       hc_static_unassigned_stacktrace_offset = 0  // New since 1.7

   449   };

   450   // Trace constants

   451   enum {

   452     trace_methods_offset = 0,

   453     trace_bcis_offset    = 1,

   454     trace_mirrors_offset = 2,

   455     trace_names_offset   = 3,

   456     trace_next_offset    = 4,

   457     trace_size           = 5,

   458     trace_chunk_size     = 32

   459   };

   460 

   461   static int backtrace_offset;

   462   static int detailMessage_offset;

   463   static int stackTrace_offset;

   464   static int depth_offset;

   465   static int static_unassigned_stacktrace_offset;

   466 

   467   // StackTrace (programmatic access, new since 1.4)

   468   static void clear_stacktrace(oop throwable);

   469   // Stacktrace (post JDK 1.7.0 to allow immutability protocol to be followed)

   470   static void set_stacktrace(oop throwable, oop st_element_array);

   471   static oop unassigned_stacktrace();

   472 

   473  public:

   474   // Backtrace

   475   static oop backtrace(oop throwable);

   476   static void set_backtrace(oop throwable, oop value);

   477   static int depth(oop throwable);

   478   static void set_depth(oop throwable, int value);

   479   // Needed by JVMTI to filter out this internal field.

   480   static int get_backtrace_offset() { return backtrace_offset;}

   481   static int get_detailMessage_offset() { return detailMessage_offset;}

   482   // Message

   483   static oop message(oop throwable);

   484   static void set_message(oop throwable, oop value);

   485   static Symbol* detail_message(oop throwable);

   486   static void print_stack_element(outputStream *st, const methodHandle& method, int bci);

   487   static void print_stack_usage(Handle stream);

   488 

   489   static void compute_offsets();

   490 

   491   // Allocate space for backtrace (created but stack trace not filled in)

   492   static void allocate_backtrace(Handle throwable, TRAPS);

   493   // Fill in current stack trace for throwable with preallocated backtrace (no GC)

   494   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);

   495   // Fill in current stack trace, can cause GC

   496   static void fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS);

   497   static void fill_in_stack_trace(Handle throwable, const methodHandle& method = methodHandle());

   498   // Programmatic access to stack trace

   499   static void get_stack_trace_elements(Handle throwable, objArrayHandle stack_trace, TRAPS);

   500   // Printing

   501   static void print(oop throwable, outputStream* st);

   502   static void print_stack_trace(Handle throwable, outputStream* st);

   503   static void java_printStackTrace(Handle throwable, TRAPS);

   504   // Debugging

   505   friend class JavaClasses;

   506 };

   507 

   508 

   509 // Interface to java.lang.reflect.AccessibleObject objects

   510 

   511 class java_lang_reflect_AccessibleObject: AllStatic {

   512  private:

   513   // Note that to reduce dependencies on the JDK we compute these

   514   // offsets at run-time.

   515   static int override_offset;

   516 

   517   static void compute_offsets();

   518 

   519  public:

   520   // Accessors

   521   static jboolean override(oop reflect);

   522   static void set_override(oop reflect, jboolean value);

   523 

   524   // Debugging

   525   friend class JavaClasses;

   526 };

   527 

   528 

   529 // Interface to java.lang.reflect.Method objects

   530 

   531 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {

   532  private:

   533   // Note that to reduce dependencies on the JDK we compute these

   534   // offsets at run-time.

   535   static int clazz_offset;

   536   static int name_offset;

   537   static int returnType_offset;

   538   static int parameterTypes_offset;

   539   static int exceptionTypes_offset;

   540   static int slot_offset;

   541   static int modifiers_offset;

   542   static int signature_offset;

   543   static int annotations_offset;

   544   static int parameter_annotations_offset;

   545   static int annotation_default_offset;

   546   static int type_annotations_offset;

   547 

   548   static void compute_offsets();

   549 

   550  public:

   551   // Allocation

   552   static Handle create(TRAPS);

   553 

   554   // Accessors

   555   static oop clazz(oop reflect);

   556   static void set_clazz(oop reflect, oop value);

   557 

   558   static oop name(oop method);

   559   static void set_name(oop method, oop value);

   560 

   561   static oop return_type(oop method);

   562   static void set_return_type(oop method, oop value);

   563 

   564   static oop parameter_types(oop method);

   565   static void set_parameter_types(oop method, oop value);

   566 

   567   static oop exception_types(oop method);

   568   static void set_exception_types(oop method, oop value);

   569 

   570   static int slot(oop reflect);

   571   static void set_slot(oop reflect, int value);

   572 

   573   static int modifiers(oop method);

   574   static void set_modifiers(oop method, int value);

   575 

   576   static bool has_signature_field();

   577   static oop signature(oop method);

   578   static void set_signature(oop method, oop value);

   579 

   580   static bool has_annotations_field();

   581   static oop annotations(oop method);

   582   static void set_annotations(oop method, oop value);

   583 

   584   static bool has_parameter_annotations_field();

   585   static oop parameter_annotations(oop method);

   586   static void set_parameter_annotations(oop method, oop value);

   587 

   588   static bool has_annotation_default_field();

   589   static oop annotation_default(oop method);

   590   static void set_annotation_default(oop method, oop value);

   591 

   592   static bool has_type_annotations_field();

   593   static oop type_annotations(oop method);

   594   static void set_type_annotations(oop method, oop value);

   595 

   596   // Debugging

   597   friend class JavaClasses;

   598 };

   599 

   600 

   601 // Interface to java.lang.reflect.Constructor objects

   602 

   603 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {

   604  private:

   605   // Note that to reduce dependencies on the JDK we compute these

   606   // offsets at run-time.

   607   static int clazz_offset;

   608   static int parameterTypes_offset;

   609   static int exceptionTypes_offset;

   610   static int slot_offset;

   611   static int modifiers_offset;

   612   static int signature_offset;

   613   static int annotations_offset;

   614   static int parameter_annotations_offset;

   615   static int type_annotations_offset;

   616 

   617   static void compute_offsets();

   618 

   619  public:

   620   // Allocation

   621   static Handle create(TRAPS);

   622 

   623   // Accessors

   624   static oop clazz(oop reflect);

   625   static void set_clazz(oop reflect, oop value);

   626 

   627   static oop parameter_types(oop constructor);

   628   static void set_parameter_types(oop constructor, oop value);

   629 

   630   static oop exception_types(oop constructor);

   631   static void set_exception_types(oop constructor, oop value);

   632 

   633   static int slot(oop reflect);

   634   static void set_slot(oop reflect, int value);

   635 

   636   static int modifiers(oop constructor);

   637   static void set_modifiers(oop constructor, int value);

   638 

   639   static bool has_signature_field();

   640   static oop signature(oop constructor);

   641   static void set_signature(oop constructor, oop value);

   642 

   643   static bool has_annotations_field();

   644   static oop annotations(oop constructor);

   645   static void set_annotations(oop constructor, oop value);

   646 

   647   static bool has_parameter_annotations_field();

   648   static oop parameter_annotations(oop method);

   649   static void set_parameter_annotations(oop method, oop value);

   650 

   651   static bool has_type_annotations_field();

   652   static oop type_annotations(oop constructor);

   653   static void set_type_annotations(oop constructor, oop value);

   654 

   655   // Debugging

   656   friend class JavaClasses;

   657 };

   658 

   659 

   660 // Interface to java.lang.reflect.Field objects

   661 

   662 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {

   663  private:

   664   // Note that to reduce dependencies on the JDK we compute these

   665   // offsets at run-time.

   666   static int clazz_offset;

   667   static int name_offset;

   668   static int type_offset;

   669   static int slot_offset;

   670   static int modifiers_offset;

   671   static int signature_offset;

   672   static int annotations_offset;

   673   static int type_annotations_offset;

   674 

   675   static void compute_offsets();

   676 

   677  public:

   678   // Allocation

   679   static Handle create(TRAPS);

   680 

   681   // Accessors

   682   static oop clazz(oop reflect);

   683   static void set_clazz(oop reflect, oop value);

   684 

   685   static oop name(oop field);

   686   static void set_name(oop field, oop value);

   687 

   688   static oop type(oop field);

   689   static void set_type(oop field, oop value);

   690 

   691   static int slot(oop reflect);

   692   static void set_slot(oop reflect, int value);

   693 

   694   static int modifiers(oop field);

   695   static void set_modifiers(oop field, int value);

   696 

   697   static bool has_signature_field();

   698   static oop signature(oop constructor);

   699   static void set_signature(oop constructor, oop value);

   700 

   701   static bool has_annotations_field();

   702   static oop annotations(oop constructor);

   703   static void set_annotations(oop constructor, oop value);

   704 

   705   static bool has_parameter_annotations_field();

   706   static oop parameter_annotations(oop method);

   707   static void set_parameter_annotations(oop method, oop value);

   708 

   709   static bool has_annotation_default_field();

   710   static oop annotation_default(oop method);

   711   static void set_annotation_default(oop method, oop value);

   712 

   713   static bool has_type_annotations_field();

   714   static oop type_annotations(oop field);

   715   static void set_type_annotations(oop field, oop value);

   716 

   717   // Debugging

   718   friend class JavaClasses;

   719 };

   720 

   721 class java_lang_reflect_Parameter {

   722  private:

   723   // Note that to reduce dependencies on the JDK we compute these

   724   // offsets at run-time.

   725   static int name_offset;

   726   static int modifiers_offset;

   727   static int index_offset;

   728   static int executable_offset;

   729 

   730   static void compute_offsets();

   731 

   732  public:

   733   // Allocation

   734   static Handle create(TRAPS);

   735 

   736   // Accessors

   737   static oop name(oop field);

   738   static void set_name(oop field, oop value);

   739 

   740   static int index(oop reflect);

   741   static void set_index(oop reflect, int value);

   742 

   743   static int modifiers(oop reflect);

   744   static void set_modifiers(oop reflect, int value);

   745 

   746   static oop executable(oop constructor);

   747   static void set_executable(oop constructor, oop value);

   748 

   749   friend class JavaClasses;

   750 };

   751 

   752 #define MODULE_INJECTED_FIELDS(macro)                            \

   753   macro(java_lang_Module, module_entry, intptr_signature, false)

   754 

   755 class java_lang_Module {

   756   private:

   757     static int loader_offset;

   758     static int name_offset;

   759     static int _module_entry_offset;

   760     static void compute_offsets();

   761 

   762   public:

   763     // Allocation

   764     static Handle create(Handle loader, Handle module_name, TRAPS);

   765 

   766     // Testers

   767     static bool is_instance(oop obj);

   768 

   769     // Accessors

   770     static oop loader(oop module);

   771     static void set_loader(oop module, oop value);

   772 

   773     static oop name(oop module);

   774     static void set_name(oop module, oop value);

   775 

   776     static ModuleEntry* module_entry(oop module, TRAPS);

   777     static void set_module_entry(oop module, ModuleEntry* module_entry);

   778 

   779   friend class JavaClasses;

   780 };

   781 

   782 // Interface to jdk.internal.reflect.ConstantPool objects

   783 class reflect_ConstantPool {

   784  private:

   785   // Note that to reduce dependencies on the JDK we compute these

   786   // offsets at run-time.

   787   static int _oop_offset;

   788 

   789   static void compute_offsets();

   790 

   791  public:

   792   // Allocation

   793   static Handle create(TRAPS);

   794 

   795   // Accessors

   796   static void set_cp(oop reflect, ConstantPool* value);

   797   static int oop_offset() {

   798     return _oop_offset;

   799   }

   800 

   801   static ConstantPool* get_cp(oop reflect);

   802 

   803   // Debugging

   804   friend class JavaClasses;

   805 };

   806 

   807 // Interface to jdk.internal.reflect.UnsafeStaticFieldAccessorImpl objects

   808 class reflect_UnsafeStaticFieldAccessorImpl {

   809  private:

   810   static int _base_offset;

   811   static void compute_offsets();

   812 

   813  public:

   814   static int base_offset() {

   815     return _base_offset;

   816   }

   817 

   818   // Debugging

   819   friend class JavaClasses;

   820 };

   821 

   822 // Interface to java.lang primitive type boxing objects:

   823 //  - java.lang.Boolean

   824 //  - java.lang.Character

   825 //  - java.lang.Float

   826 //  - java.lang.Double

   827 //  - java.lang.Byte

   828 //  - java.lang.Short

   829 //  - java.lang.Integer

   830 //  - java.lang.Long

   831 

   832 // This could be separated out into 8 individual classes.

   833 

   834 class java_lang_boxing_object: AllStatic {

   835  private:

   836   enum {

   837    hc_value_offset = 0

   838   };

   839   static int value_offset;

   840   static int long_value_offset;

   841 

   842   static oop initialize_and_allocate(BasicType type, TRAPS);

   843  public:

   844   // Allocation. Returns a boxed value, or NULL for invalid type.

   845   static oop create(BasicType type, jvalue* value, TRAPS);

   846   // Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.

   847   static BasicType get_value(oop box, jvalue* value);

   848   static BasicType set_value(oop box, jvalue* value);

   849   static BasicType basic_type(oop box);

   850   static bool is_instance(oop box)                 { return basic_type(box) != T_ILLEGAL; }

   851   static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }

   852   static void print(oop box, outputStream* st)     { jvalue value;  print(get_value(box, &value), &value, st); }

   853   static void print(BasicType type, jvalue* value, outputStream* st);

   854 

   855   static int value_offset_in_bytes(BasicType type) {

   856     return ( type == T_LONG || type == T_DOUBLE ) ? long_value_offset :

   857                                                     value_offset;

   858   }

   859 

   860   // Debugging

   861   friend class JavaClasses;

   862 };

   863 

   864 

   865 

   866 // Interface to java.lang.ref.Reference objects

   867 

   868 class java_lang_ref_Reference: AllStatic {

   869  public:

   870   enum {

   871    hc_referent_offset   = 0,

   872    hc_queue_offset      = 1,

   873    hc_next_offset       = 2,

   874    hc_discovered_offset = 3  // Is not last, see SoftRefs.

   875   };

   876 

   877   static int referent_offset;

   878   static int queue_offset;

   879   static int next_offset;

   880   static int discovered_offset;

   881   static int number_of_fake_oop_fields;

   882 

   883   // Accessors

   884   static inline oop referent(oop ref);

   885   static inline void set_referent(oop ref, oop value);

   886   static inline void set_referent_raw(oop ref, oop value);

   887   static inline HeapWord* referent_addr(oop ref);

   888   static inline oop next(oop ref);

   889   static inline void set_next(oop ref, oop value);

   890   static inline void set_next_raw(oop ref, oop value);

   891   static inline HeapWord* next_addr(oop ref);

   892   static inline oop discovered(oop ref);

   893   static inline void set_discovered(oop ref, oop value);

   894   static inline void set_discovered_raw(oop ref, oop value);

   895   static inline HeapWord* discovered_addr(oop ref);

   896 };

   897 

   898 

   899 // Interface to java.lang.ref.SoftReference objects

   900 

   901 class java_lang_ref_SoftReference: public java_lang_ref_Reference {

   902  public:

   903   enum {

   904    // The timestamp is a long field and may need to be adjusted for alignment.

   905    hc_timestamp_offset  = hc_discovered_offset + 1

   906   };

   907   enum {

   908    hc_static_clock_offset = 0

   909   };

   910 

   911   static int timestamp_offset;

   912   static int static_clock_offset;

   913 

   914   // Accessors

   915   static jlong timestamp(oop ref);

   916 

   917   // Accessors for statics

   918   static jlong clock();

   919   static void set_clock(jlong value);

   920 };

   921 

   922 // Interface to java.lang.invoke.MethodHandle objects

   923 

   924 class MethodHandleEntry;

   925 

   926 class java_lang_invoke_MethodHandle: AllStatic {

   927   friend class JavaClasses;

   928 

   929  private:

   930   static int _type_offset;               // the MethodType of this MH

   931   static int _form_offset;               // the LambdaForm of this MH

   932 

   933   static void compute_offsets();

   934 

   935  public:

   936   // Accessors

   937   static oop            type(oop mh);

   938   static void       set_type(oop mh, oop mtype);

   939 

   940   static oop            form(oop mh);

   941   static void       set_form(oop mh, oop lform);

   942 

   943   // Testers

   944   static bool is_subclass(Klass* klass) {

   945     return klass->is_subclass_of(SystemDictionary::MethodHandle_klass());

   946   }

   947   static bool is_instance(oop obj);

   948 

   949   // Accessors for code generation:

   950   static int type_offset_in_bytes()             { return _type_offset; }

   951   static int form_offset_in_bytes()             { return _form_offset; }

   952 };

   953 

   954 // Interface to java.lang.invoke.DirectMethodHandle objects

   955 

   956 class java_lang_invoke_DirectMethodHandle: AllStatic {

   957   friend class JavaClasses;

   958 

   959  private:

   960   static int _member_offset;               // the MemberName of this DMH

   961 

   962   static void compute_offsets();

   963 

   964  public:

   965   // Accessors

   966   static oop  member(oop mh);

   967 

   968   // Testers

   969   static bool is_subclass(Klass* klass) {

   970     return klass->is_subclass_of(SystemDictionary::DirectMethodHandle_klass());

   971   }

   972   static bool is_instance(oop obj);

   973 

   974   // Accessors for code generation:

   975   static int member_offset_in_bytes()           { return _member_offset; }

   976 };

   977 

   978 // Interface to java.lang.invoke.LambdaForm objects

   979 // (These are a private interface for managing adapter code generation.)

   980 

   981 class java_lang_invoke_LambdaForm: AllStatic {

   982   friend class JavaClasses;

   983 

   984  private:

   985   static int _vmentry_offset;  // type is MemberName

   986 

   987   static void compute_offsets();

   988 

   989  public:

   990   // Accessors

   991   static oop            vmentry(oop lform);

   992   static void       set_vmentry(oop lform, oop invoker);

   993 

   994   // Testers

   995   static bool is_subclass(Klass* klass) {

   996     return SystemDictionary::LambdaForm_klass() != NULL &&

   997       klass->is_subclass_of(SystemDictionary::LambdaForm_klass());

   998   }

   999   static bool is_instance(oop obj);

  1000 

  1001   // Accessors for code generation:

  1002   static int vmentry_offset_in_bytes()          { return _vmentry_offset; }

  1003 };

  1004 

  1005 

  1006 // Interface to java.lang.invoke.MemberName objects

  1007 // (These are a private interface for Java code to query the class hierarchy.)

  1008 

  1009 #define RESOLVEDMETHOD_INJECTED_FIELDS(macro)                                   \

  1010   macro(java_lang_invoke_ResolvedMethodName, vmholder, object_signature, false) \

  1011   macro(java_lang_invoke_ResolvedMethodName, vmtarget, intptr_signature, false)

  1012 

  1013 class java_lang_invoke_ResolvedMethodName : AllStatic {

  1014   friend class JavaClasses;

  1015 

  1016   static int _vmtarget_offset;

  1017   static int _vmholder_offset;

  1018 

  1019   static void compute_offsets();

  1020  public:

  1021   static int vmtarget_offset_in_bytes() { return _vmtarget_offset; }

  1022 

  1023   static Method* vmtarget(oop resolved_method);

  1024   static void set_vmtarget(oop resolved_method, Method* method);

  1025 

  1026   // find or create resolved member name

  1027   static oop find_resolved_method(const methodHandle& m, TRAPS);

  1028 

  1029   static bool is_instance(oop resolved_method);

  1030 };

  1031 

  1032 

  1033 #define MEMBERNAME_INJECTED_FIELDS(macro)                               \

  1034   macro(java_lang_invoke_MemberName, vmindex,  intptr_signature, false)

  1035 

  1036 

  1037 class java_lang_invoke_MemberName: AllStatic {

  1038   friend class JavaClasses;

  1039 

  1040  private:

  1041   // From java.lang.invoke.MemberName:

  1042   //    private Class<?>   clazz;       // class in which the method is defined

  1043   //    private String     name;        // may be null if not yet materialized

  1044   //    private Object     type;        // may be null if not yet materialized

  1045   //    private int        flags;       // modifier bits; see reflect.Modifier

  1046   //    private ResolvedMethodName method;    // holds VM-specific target value

  1047   //    private intptr_t   vmindex;     // member index within class or interface

  1048   static int _clazz_offset;

  1049   static int _name_offset;

  1050   static int _type_offset;

  1051   static int _flags_offset;

  1052   static int _method_offset;

  1053   static int _vmindex_offset;

  1054 

  1055   static void compute_offsets();

  1056 

  1057  public:

  1058   // Accessors

  1059   static oop            clazz(oop mname);

  1060   static void       set_clazz(oop mname, oop clazz);

  1061 

  1062   static oop            type(oop mname);

  1063   static void       set_type(oop mname, oop type);

  1064 

  1065   static oop            name(oop mname);

  1066   static void       set_name(oop mname, oop name);

  1067 

  1068   static int            flags(oop mname);

  1069   static void       set_flags(oop mname, int flags);

  1070 

  1071   // Link through ResolvedMethodName field to get Method*

  1072   static Method*        vmtarget(oop mname);

  1073   static void       set_method(oop mname, oop method);

  1074 

  1075   static intptr_t       vmindex(oop mname);

  1076   static void       set_vmindex(oop mname, intptr_t index);

  1077 

  1078   // Testers

  1079   static bool is_subclass(Klass* klass) {

  1080     return klass->is_subclass_of(SystemDictionary::MemberName_klass());

  1081   }

  1082   static bool is_instance(oop obj);

  1083 

  1084   static bool is_method(oop obj);

  1085 

  1086   // Relevant integer codes (keep these in synch. with MethodHandleNatives.Constants):

  1087   enum {

  1088     MN_IS_METHOD            = 0x00010000, // method (not constructor)

  1089     MN_IS_CONSTRUCTOR       = 0x00020000, // constructor

  1090     MN_IS_FIELD             = 0x00040000, // field

  1091     MN_IS_TYPE              = 0x00080000, // nested type

  1092     MN_CALLER_SENSITIVE     = 0x00100000, // @CallerSensitive annotation detected

  1093     MN_REFERENCE_KIND_SHIFT = 24, // refKind

  1094     MN_REFERENCE_KIND_MASK  = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT,

  1095     // The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers:

  1096     MN_SEARCH_SUPERCLASSES  = 0x00100000, // walk super classes

  1097     MN_SEARCH_INTERFACES    = 0x00200000  // walk implemented interfaces

  1098   };

  1099 

  1100   // Accessors for code generation:

  1101   static int clazz_offset_in_bytes()            { return _clazz_offset; }

  1102   static int type_offset_in_bytes()             { return _type_offset; }

  1103   static int name_offset_in_bytes()             { return _name_offset; }

  1104   static int flags_offset_in_bytes()            { return _flags_offset; }

  1105   static int method_offset_in_bytes()           { return _method_offset; }

  1106   static int vmindex_offset_in_bytes()          { return _vmindex_offset; }

  1107 };

  1108 

  1109 

  1110 // Interface to java.lang.invoke.MethodType objects

  1111 

  1112 class java_lang_invoke_MethodType: AllStatic {

  1113   friend class JavaClasses;

  1114 

  1115  private:

  1116   static int _rtype_offset;

  1117   static int _ptypes_offset;

  1118 

  1119   static void compute_offsets();

  1120 

  1121  public:

  1122   // Accessors

  1123   static oop            rtype(oop mt);

  1124   static objArrayOop    ptypes(oop mt);

  1125 

  1126   static oop            ptype(oop mt, int index);

  1127   static int            ptype_count(oop mt);

  1128 

  1129   static int            ptype_slot_count(oop mt);  // extra counts for long/double

  1130   static int            rtype_slot_count(oop mt);  // extra counts for long/double

  1131 

  1132   static Symbol*        as_signature(oop mt, bool intern_if_not_found, TRAPS);

  1133   static void           print_signature(oop mt, outputStream* st);

  1134