1 /*

     2  * Copyright 1997-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 // Interface for manipulating the basic Java classes.

    26 //

    27 // All dependencies on layout of actual Java classes should be kept here.

    28 // If the layout of any of the classes above changes the offsets must be adjusted.

    29 //

    30 // For most classes we hardwire the offsets for performance reasons. In certain

    31 // cases (e.g. java.security.AccessControlContext) we compute the offsets at

    32 // startup since the layout here differs between JDK1.2 and JDK1.3.

    33 //

    34 // Note that fields (static and non-static) are arranged with oops before non-oops

    35 // on a per class basis. The offsets below have to reflect this ordering.

    36 //

    37 // When editing the layouts please update the check_offset verification code

    38 // correspondingly. The names in the enums must be identical to the actual field

    39 // names in order for the verification code to work.

    40 

    41 

    42 // Interface to java.lang.String objects

    43 

    44 class java_lang_String : AllStatic {

    45  private:

    46   enum {

    47     hc_value_offset  = 0,

    48     hc_offset_offset = 1,

    49     hc_count_offset  = 2,

    50     hc_hash_offset   = 3

    51   };

    52 

    53   static int value_offset;

    54   static int offset_offset;

    55   static int count_offset;

    56   static int hash_offset;

    57 

    58   static Handle basic_create(int length, bool tenured, TRAPS);

    59   static Handle basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS);

    60 

    61   static void set_value( oop string, typeArrayOop buffer) { string->obj_field_put(value_offset,  (oop)buffer); }

    62   static void set_offset(oop string, int offset)          { string->int_field_put(offset_offset, offset); }

    63   static void set_count( oop string, int count)           { string->int_field_put(count_offset,  count);  }

    64 

    65  public:

    66   // Instance creation

    67   static Handle create_from_unicode(jchar* unicode, int len, TRAPS);

    68   static Handle create_tenured_from_unicode(jchar* unicode, int len, TRAPS);

    69   static oop    create_oop_from_unicode(jchar* unicode, int len, TRAPS);

    70   static Handle create_from_str(const char* utf8_str, TRAPS);

    71   static oop    create_oop_from_str(const char* utf8_str, TRAPS);

    72   static Handle create_from_symbol(symbolHandle symbol, TRAPS);

    73   static Handle create_from_platform_dependent_str(const char* str, TRAPS);

    74   static Handle char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS);

    75 

    76   static int value_offset_in_bytes()  { return value_offset;  }

    77   static int count_offset_in_bytes()  { return count_offset;  }

    78   static int offset_offset_in_bytes() { return offset_offset; }

    79   static int hash_offset_in_bytes()   { return hash_offset;   }

    80 

    81   // Accessors

    82   static typeArrayOop value(oop java_string) {

    83     assert(is_instance(java_string), "must be java_string");

    84     return (typeArrayOop) java_string->obj_field(value_offset);

    85   }

    86   static int offset(oop java_string) {

    87     assert(is_instance(java_string), "must be java_string");

    88     return java_string->int_field(offset_offset);

    89   }

    90   static int length(oop java_string) {

    91     assert(is_instance(java_string), "must be java_string");

    92     return java_string->int_field(count_offset);

    93   }

    94   static int utf8_length(oop java_string);

    95 

    96   // String converters

    97   static char*  as_utf8_string(oop java_string);

    98   static char*  as_utf8_string(oop java_string, int start, int len);

    99   static jchar* as_unicode_string(oop java_string, int& length);

   100 

   101   static bool equals(oop java_string, jchar* chars, int len);

   102 

   103   // Conversion between '.' and '/' formats

   104   static Handle externalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '/', '.', THREAD); }

   105   static Handle internalize_classname(Handle java_string, TRAPS) { return char_converter(java_string, '.', '/', THREAD); }

   106 

   107   // Conversion

   108   static symbolHandle as_symbol(Handle java_string, TRAPS);

   109 

   110   // Testers

   111   static bool is_instance(oop obj) {

   112     return obj != NULL && obj->klass() == SystemDictionary::string_klass();

   113   }

   114 

   115   // Debugging

   116   static void print(Handle java_string, outputStream* st);

   117   friend class JavaClasses;

   118 };

   119 

   120 

   121 // Interface to java.lang.Class objects

   122 

   123 class java_lang_Class : AllStatic {

   124    friend class VMStructs;

   125  private:

   126   // The fake offsets are added by the class loader when java.lang.Class is loaded

   127 

   128   enum {

   129     hc_klass_offset                = 0,

   130     hc_array_klass_offset          = 1,

   131     hc_resolved_constructor_offset = 2,

   132     hc_number_of_fake_oop_fields   = 3

   133   };

   134 

   135   static int klass_offset;

   136   static int resolved_constructor_offset;

   137   static int array_klass_offset;

   138   static int number_of_fake_oop_fields;

   139 

   140   static void compute_offsets();

   141   static bool offsets_computed;

   142   static int classRedefinedCount_offset;

   143 

   144  public:

   145   // Instance creation

   146   static oop  create_mirror(KlassHandle k, TRAPS);

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

   148   // Conversion

   149   static klassOop as_klassOop(oop java_class);

   150   // Testing

   151   static bool is_primitive(oop java_class);

   152   static BasicType primitive_type(oop java_class);

   153   static oop primitive_mirror(BasicType t);

   154   // JVM_NewInstance support

   155   static methodOop resolved_constructor(oop java_class);

   156   static void set_resolved_constructor(oop java_class, methodOop constructor);

   157   // JVM_NewArray support

   158   static klassOop array_klass(oop java_class);

   159   static void set_array_klass(oop java_class, klassOop klass);

   160   // compiler support for class operations

   161   static int klass_offset_in_bytes() { return klass_offset; }

   162   static int resolved_constructor_offset_in_bytes() { return resolved_constructor_offset; }

   163   static int array_klass_offset_in_bytes() { return array_klass_offset; }

   164   // Support for classRedefinedCount field

   165   static int classRedefinedCount(oop the_class_mirror);

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

   167   // Debugging

   168   friend class JavaClasses;

   169   friend class instanceKlass;   // verification code accesses offsets

   170   friend class ClassFileParser; // access to number_of_fake_fields

   171 };

   172 

   173 // Interface to java.lang.Thread objects

   174 

   175 class java_lang_Thread : AllStatic {

   176  private:

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

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

   179   static int _name_offset;

   180   static int _group_offset;

   181   static int _contextClassLoader_offset;

   182   static int _inheritedAccessControlContext_offset;

   183   static int _priority_offset;

   184   static int _eetop_offset;

   185   static int _daemon_offset;

   186   static int _stillborn_offset;

   187   static int _stackSize_offset;

   188   static int _tid_offset;

   189   static int _thread_status_offset;

   190   static int _park_blocker_offset;

   191   static int _park_event_offset ;

   192 

   193   static void compute_offsets();

   194 

   195  public:

   196   // Instance creation

   197   static oop create();

   198   // Returns the JavaThread associated with the thread obj

   199   static JavaThread* thread(oop java_thread);

   200   // Set JavaThread for instance

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

   202   // Name

   203   static typeArrayOop name(oop java_thread);

   204   static void set_name(oop java_thread, typeArrayOop name);

   205   // Priority

   206   static ThreadPriority priority(oop java_thread);

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

   208   // Thread group

   209   static oop  threadGroup(oop java_thread);

   210   // Stillborn

   211   static bool is_stillborn(oop java_thread);

   212   static void set_stillborn(oop java_thread);

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

   214   // definition without doing a Java call)

   215   static bool is_alive(oop java_thread);

   216   // Daemon

   217   static bool is_daemon(oop java_thread);

   218   static void set_daemon(oop java_thread);

   219   // Context ClassLoader

   220   static oop context_class_loader(oop java_thread);

   221   // Control context

   222   static oop inherited_access_control_context(oop java_thread);

   223   // Stack size hint

   224   static jlong stackSize(oop java_thread);

   225   // Thread ID

   226   static jlong thread_id(oop java_thread);

   227 

   228   // Blocker object responsible for thread parking

   229   static oop park_blocker(oop java_thread);

   230 

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

   232   // Should be set when apparently null

   233   // For details, see unsafe.cpp Unsafe_Unpark

   234   static jlong park_event(oop java_thread);

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

   236 

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

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

   239   // java.lang.Thread java class.

   240   enum ThreadStatus {

   241     NEW                      = 0,

   242     RUNNABLE                 = JVMTI_THREAD_STATE_ALIVE +          // runnable / running

   243                                JVMTI_THREAD_STATE_RUNNABLE,

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

   245                                JVMTI_THREAD_STATE_WAITING +

   246                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   247                                JVMTI_THREAD_STATE_SLEEPING,

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

   249                                JVMTI_THREAD_STATE_WAITING +

   250                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +

   251                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,

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

   253                                JVMTI_THREAD_STATE_WAITING +

   254                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   255                                JVMTI_THREAD_STATE_IN_OBJECT_WAIT,

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

   257                                JVMTI_THREAD_STATE_WAITING +

   258                                JVMTI_THREAD_STATE_WAITING_INDEFINITELY +

   259                                JVMTI_THREAD_STATE_PARKED,

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

   261                                JVMTI_THREAD_STATE_WAITING +

   262                                JVMTI_THREAD_STATE_WAITING_WITH_TIMEOUT +

   263                                JVMTI_THREAD_STATE_PARKED,

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

   265                                JVMTI_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER,

   266     TERMINATED               = JVMTI_THREAD_STATE_TERMINATED

   267   };

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

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

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

   271   static ThreadStatus get_thread_status(oop java_thread_oop);

   272 

   273   static const char*  thread_status_name(oop java_thread_oop);

   274 

   275   // Debugging

   276   friend class JavaClasses;

   277 };

   278 

   279 // Interface to java.lang.ThreadGroup objects

   280 

   281 class java_lang_ThreadGroup : AllStatic {

   282  private:

   283   static int _parent_offset;

   284   static int _name_offset;

   285   static int _threads_offset;

   286   static int _groups_offset;

   287   static int _maxPriority_offset;

   288   static int _destroyed_offset;

   289   static int _daemon_offset;

   290   static int _vmAllowSuspension_offset;

   291   static int _nthreads_offset;

   292   static int _ngroups_offset;

   293 

   294   static void compute_offsets();

   295 

   296  public:

   297   // parent ThreadGroup

   298   static oop  parent(oop java_thread_group);

   299   // name

   300   static typeArrayOop name(oop java_thread_group);

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

   302   // Number of threads in group

   303   static int nthreads(oop java_thread_group);

   304   // threads

   305   static objArrayOop threads(oop java_thread_group);

   306   // Number of threads in group

   307   static int ngroups(oop java_thread_group);

   308   // groups

   309   static objArrayOop groups(oop java_thread_group);

   310   // maxPriority in group

   311   static ThreadPriority maxPriority(oop java_thread_group);

   312   // Destroyed

   313   static bool is_destroyed(oop java_thread_group);

   314   // Daemon

   315   static bool is_daemon(oop java_thread_group);

   316   // vmAllowSuspension

   317   static bool is_vmAllowSuspension(oop java_thread_group);

   318   // Debugging

   319   friend class JavaClasses;

   320 };

   321 

   322 

   323 

   324 // Interface to java.lang.Throwable objects

   325 

   326 class java_lang_Throwable: AllStatic {

   327   friend class BacktraceBuilder;

   328 

   329  private:

   330   // Offsets

   331   enum {

   332     hc_backtrace_offset     =  0,

   333     hc_detailMessage_offset =  1,

   334     hc_cause_offset         =  2,  // New since 1.4

   335     hc_stackTrace_offset    =  3   // New since 1.4

   336   };

   337   // Trace constants

   338   enum {

   339     trace_methods_offset = 0,

   340     trace_bcis_offset    = 1,

   341     trace_next_offset    = 2,

   342     trace_size           = 3,

   343     trace_chunk_size     = 32

   344   };

   345 

   346   static int backtrace_offset;

   347   static int detailMessage_offset;

   348   static int cause_offset;

   349   static int stackTrace_offset;

   350 

   351   // Printing

   352   static char* print_stack_element_to_buffer(methodOop method, int bci);

   353   static void print_to_stream(Handle stream, const char* str);

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

   355   static void clear_stacktrace(oop throwable);

   356   // No stack trace available

   357   static const char* no_stack_trace_message();

   358 

   359  public:

   360   // Backtrace

   361   static oop backtrace(oop throwable);

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

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

   364   static int get_backtrace_offset() { return backtrace_offset;}

   365   static int get_detailMessage_offset() { return detailMessage_offset;}

   366   // Message

   367   static oop message(oop throwable);

   368   static oop message(Handle throwable);

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

   370   // Print stack trace stored in exception by call-back to Java

   371   // Note: this is no longer used in Merlin, but we still suppport

   372   // it for compatibility.

   373   static void print_stack_trace(oop throwable, oop print_stream);

   374   static void print_stack_element(Handle stream, methodOop method, int bci);

   375   static void print_stack_element(outputStream *st, methodOop method, int bci);

   376   static void print_stack_usage(Handle stream);

   377 

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

   379   static void allocate_backtrace(Handle throwable, TRAPS);

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

   381   static void fill_in_stack_trace_of_preallocated_backtrace(Handle throwable);

   382 

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

   384   static void fill_in_stack_trace(Handle throwable, TRAPS);

   385   static void fill_in_stack_trace(Handle throwable);

   386   // Programmatic access to stack trace

   387   static oop  get_stack_trace_element(oop throwable, int index, TRAPS);

   388   static int  get_stack_trace_depth(oop throwable, TRAPS);

   389   // Printing

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

   391   static void print(Handle throwable, outputStream* st);

   392   static void print_stack_trace(oop throwable, outputStream* st);

   393   // Debugging

   394   friend class JavaClasses;

   395 };

   396 

   397 

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

   399 

   400 class java_lang_reflect_AccessibleObject: AllStatic {

   401  private:

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

   403   // offsets at run-time.

   404   static int override_offset;

   405 

   406   static void compute_offsets();

   407 

   408  public:

   409   // Accessors

   410   static jboolean override(oop reflect);

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

   412 

   413   // Debugging

   414   friend class JavaClasses;

   415 };

   416 

   417 

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

   419 

   420 class java_lang_reflect_Method : public java_lang_reflect_AccessibleObject {

   421  private:

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

   423   // offsets at run-time.

   424   static int clazz_offset;

   425   static int name_offset;

   426   static int returnType_offset;

   427   static int parameterTypes_offset;

   428   static int exceptionTypes_offset;

   429   static int slot_offset;

   430   static int modifiers_offset;

   431   static int signature_offset;

   432   static int annotations_offset;

   433   static int parameter_annotations_offset;

   434   static int annotation_default_offset;

   435 

   436   static void compute_offsets();

   437 

   438  public:

   439   // Allocation

   440   static Handle create(TRAPS);

   441 

   442   // Accessors

   443   static oop clazz(oop reflect);

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

   445 

   446   static oop name(oop method);

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

   448 

   449   static oop return_type(oop method);

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

   451 

   452   static oop parameter_types(oop method);

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

   454 

   455   static oop exception_types(oop method);

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

   457 

   458   static int slot(oop reflect);

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

   460 

   461   static int modifiers(oop method);

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

   463 

   464   static bool has_signature_field();

   465   static oop signature(oop method);

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

   467 

   468   static bool has_annotations_field();

   469   static oop annotations(oop method);

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

   471 

   472   static bool has_parameter_annotations_field();

   473   static oop parameter_annotations(oop method);

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

   475 

   476   static bool has_annotation_default_field();

   477   static oop annotation_default(oop method);

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

   479 

   480   // Debugging

   481   friend class JavaClasses;

   482 };

   483 

   484 

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

   486 

   487 class java_lang_reflect_Constructor : public java_lang_reflect_AccessibleObject {

   488  private:

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

   490   // offsets at run-time.

   491   static int clazz_offset;

   492   static int parameterTypes_offset;

   493   static int exceptionTypes_offset;

   494   static int slot_offset;

   495   static int modifiers_offset;

   496   static int signature_offset;

   497   static int annotations_offset;

   498   static int parameter_annotations_offset;

   499 

   500   static void compute_offsets();

   501 

   502  public:

   503   // Allocation

   504   static Handle create(TRAPS);

   505 

   506   // Accessors

   507   static oop clazz(oop reflect);

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

   509 

   510   static oop parameter_types(oop constructor);

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

   512 

   513   static oop exception_types(oop constructor);

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

   515 

   516   static int slot(oop reflect);

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

   518 

   519   static int modifiers(oop constructor);

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

   521 

   522   static bool has_signature_field();

   523   static oop signature(oop constructor);

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

   525 

   526   static bool has_annotations_field();

   527   static oop annotations(oop constructor);

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

   529 

   530   static bool has_parameter_annotations_field();

   531   static oop parameter_annotations(oop method);

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

   533 

   534   // Debugging

   535   friend class JavaClasses;

   536 };

   537 

   538 

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

   540 

   541 class java_lang_reflect_Field : public java_lang_reflect_AccessibleObject {

   542  private:

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

   544   // offsets at run-time.

   545   static int clazz_offset;

   546   static int name_offset;

   547   static int type_offset;

   548   static int slot_offset;

   549   static int modifiers_offset;

   550   static int signature_offset;

   551   static int 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 field);

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

   565 

   566   static oop type(oop field);

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

   568 

   569   static int slot(oop reflect);

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

   571 

   572   static int modifiers(oop field);

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

   574 

   575   static bool has_signature_field();

   576   static oop signature(oop constructor);

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

   578 

   579   static bool has_annotations_field();

   580   static oop annotations(oop constructor);

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

   582 

   583   static bool has_parameter_annotations_field();

   584   static oop parameter_annotations(oop method);

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

   586 

   587   static bool has_annotation_default_field();

   588   static oop annotation_default(oop method);

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

   590 

   591   // Debugging

   592   friend class JavaClasses;

   593 };

   594 

   595 // Interface to sun.reflect.ConstantPool objects

   596 class sun_reflect_ConstantPool {

   597  private:

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

   599   // offsets at run-time.

   600   static int _cp_oop_offset;

   601 

   602   static void compute_offsets();

   603 

   604  public:

   605   // Allocation

   606   static Handle create(TRAPS);

   607 

   608   // Accessors

   609   static oop cp_oop(oop reflect);

   610   static void set_cp_oop(oop reflect, oop value);

   611   static int cp_oop_offset() {

   612     return _cp_oop_offset;

   613   }

   614 

   615   // Debugging

   616   friend class JavaClasses;

   617 };

   618 

   619 // Interface to sun.reflect.UnsafeStaticFieldAccessorImpl objects

   620 class sun_reflect_UnsafeStaticFieldAccessorImpl {

   621  private:

   622   static int _base_offset;

   623   static void compute_offsets();

   624 

   625  public:

   626   static int base_offset() {

   627     return _base_offset;

   628   }

   629 

   630   // Debugging

   631   friend class JavaClasses;

   632 };

   633 

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

   635 //  - java.lang.Boolean

   636 //  - java.lang.Character

   637 //  - java.lang.Float

   638 //  - java.lang.Double

   639 //  - java.lang.Byte

   640 //  - java.lang.Short

   641 //  - java.lang.Integer

   642 //  - java.lang.Long

   643 

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

   645 

   646 class java_lang_boxing_object: AllStatic {

   647  private:

   648   enum {

   649    hc_value_offset = 0

   650   };

   651   static int value_offset;

   652 

   653   static oop initialize_and_allocate(klassOop klass, TRAPS);

   654  public:

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

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

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

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

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

   660 

   661   static int value_offset_in_bytes() { return value_offset; }

   662 

   663   // Debugging

   664   friend class JavaClasses;

   665 };

   666 

   667 

   668 

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

   670 

   671 class java_lang_ref_Reference: AllStatic {

   672  public:

   673   enum {

   674    hc_referent_offset   = 0,

   675    hc_queue_offset      = 1,

   676    hc_next_offset       = 2,

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

   678   };

   679   enum {

   680    hc_static_lock_offset    = 0,

   681    hc_static_pending_offset = 1

   682   };

   683 

   684   static int referent_offset;

   685   static int queue_offset;

   686   static int next_offset;

   687   static int discovered_offset;

   688   static int static_lock_offset;

   689   static int static_pending_offset;

   690   static int number_of_fake_oop_fields;

   691 

   692   // Accessors

   693   static oop referent(oop ref)        { return *referent_addr(ref); }

   694   static void set_referent(oop ref, oop value);

   695   static oop* referent_addr(oop ref);

   696 

   697   static oop next(oop ref)            { return *next_addr(ref); }

   698   static void set_next(oop ref, oop value);

   699   static oop* next_addr(oop ref);

   700 

   701   static oop discovered(oop ref)      { return *discovered_addr(ref); }

   702   static void set_discovered(oop ref, oop value);

   703   static oop* discovered_addr(oop ref);

   704 

   705   // Accessors for statics

   706   static oop  pending_list_lock()     { return *pending_list_lock_addr(); }

   707   static oop  pending_list()          { return *pending_list_addr(); }

   708 

   709   static oop* pending_list_lock_addr();

   710   static oop* pending_list_addr();

   711 };

   712 

   713 

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

   715 

   716 class java_lang_ref_SoftReference: public java_lang_ref_Reference {

   717  public:

   718   enum {

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

   720    hc_timestamp_offset    = align_object_offset_(hc_discovered_offset + 1)

   721   };

   722   enum {

   723    hc_static_clock_offset = 0

   724   };

   725 

   726   static int timestamp_offset;

   727   static int static_clock_offset;

   728 

   729   // Accessors

   730   static jlong timestamp(oop ref);

   731 

   732   // Accessors for statics

   733   static jlong clock();

   734   static void set_clock(jlong value);

   735 };

   736 

   737 

   738 // Interface to java.security.AccessControlContext objects

   739 

   740 class java_security_AccessControlContext: AllStatic {

   741  private:

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

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

   744   static int _context_offset;

   745   static int _privilegedContext_offset;

   746   static int _isPrivileged_offset;

   747 

   748   static void compute_offsets();

   749  public:

   750   static oop create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS);

   751 

   752   // Debugging/initialization

   753   friend class JavaClasses;

   754 };

   755 

   756 

   757 // Interface to java.lang.ClassLoader objects

   758 

   759 class java_lang_ClassLoader : AllStatic {

   760  private:

   761   enum {

   762    hc_parent_offset = 0

   763   };

   764 

   765   static int parent_offset;

   766 

   767  public:

   768   static oop parent(oop loader);

   769 

   770   static bool is_trusted_loader(oop loader);

   771 

   772   // Fix for 4474172

   773   static oop  non_reflection_class_loader(oop loader);

   774 

   775   // Debugging

   776   friend class JavaClasses;

   777 };

   778 

   779 

   780 // Interface to java.lang.System objects

   781 

   782 class java_lang_System : AllStatic {

   783  private:

   784   enum {

   785    hc_static_in_offset  = 0,

   786    hc_static_out_offset = 1,

   787    hc_static_err_offset = 2

   788   };

   789 

   790   static int offset_of_static_fields;

   791   static int  static_in_offset;

   792   static int static_out_offset;

   793   static int static_err_offset;

   794 

   795   static void compute_offsets();

   796 

   797  public:

   798   static int  in_offset_in_bytes();

   799   static int out_offset_in_bytes();

   800   static int err_offset_in_bytes();

   801 

   802   // Debugging

   803   friend class JavaClasses;

   804 };

   805 

   806 

   807 // Interface to java.lang.StackTraceElement objects

   808 

   809 class java_lang_StackTraceElement: AllStatic {

   810  private:

   811   enum {

   812     hc_declaringClass_offset  = 0,

   813     hc_methodName_offset = 1,

   814     hc_fileName_offset   = 2,

   815     hc_lineNumber_offset = 3

   816   };

   817 

   818   static int declaringClass_offset;

   819   static int methodName_offset;

   820   static int fileName_offset;

   821   static int lineNumber_offset;

   822 

   823  public:

   824   // Setters

   825   static void set_declaringClass(oop element, oop value);

   826   static void set_methodName(oop element, oop value);

   827   static void set_fileName(oop element, oop value);

   828   static void set_lineNumber(oop element, int value);

   829 

   830   // Create an instance of StackTraceElement

   831   static oop create(methodHandle m, int bci, TRAPS);

   832 

   833   // Debugging

   834   friend class JavaClasses;

   835 };

   836 

   837 

   838 // Interface to java.lang.AssertionStatusDirectives objects

   839 

   840 class java_lang_AssertionStatusDirectives: AllStatic {

   841  private:

   842   enum {

   843     hc_classes_offset,

   844     hc_classEnabled_offset,

   845     hc_packages_offset,

   846     hc_packageEnabled_offset,

   847     hc_deflt_offset

   848   };

   849 

   850   static int classes_offset;

   851   static int classEnabled_offset;

   852   static int packages_offset;

   853   static int packageEnabled_offset;

   854   static int deflt_offset;

   855 

   856  public:

   857   // Setters

   858   static void set_classes(oop obj, oop val);

   859   static void set_classEnabled(oop obj, oop val);

   860   static void set_packages(oop obj, oop val);

   861   static void set_packageEnabled(oop obj, oop val);

   862   static void set_deflt(oop obj, bool val);

   863   // Debugging

   864   friend class JavaClasses;

   865 };

   866 

   867 

   868 class java_nio_Buffer: AllStatic {

   869  private:

   870   static int _limit_offset;

   871 

   872  public:

   873   static int  limit_offset();

   874   static void compute_offsets();

   875 };

   876 

   877 class sun_misc_AtomicLongCSImpl: AllStatic {

   878  private:

   879   static int _value_offset;

   880 

   881  public:

   882   static int  value_offset();

   883   static void compute_offsets();

   884 };

   885 

   886 class java_util_concurrent_locks_AbstractOwnableSynchronizer : AllStatic {

   887  private:

   888   static int  _owner_offset;

   889  public:

   890   static void initialize(TRAPS);

   891   static oop  get_owner_threadObj(oop obj);

   892 };

   893 

   894 // Interface to hard-coded offset checking

   895 

   896 class JavaClasses : AllStatic {

   897  private:

   898   static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;

   899   static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;

   900  public:

   901   static void compute_hard_coded_offsets();

   902   static void compute_offsets();

   903   static void check_offsets() PRODUCT_RETURN;

   904 };