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      4 <head>
      5 	<title>libc++abi spec</title>
      6 </head>
      7 <body>
      8 
      9 <table border=1>
     10 <tr>
     11 <th rowspan=2>libc++abi Specification</th>
     12 <th colspan=3>Completed ?</th>
     13 </tr>
     14 
     15 <tr>
     16 <th>darwin</th><th>linux</th><th>arm</th>
     17 </tr>
     18 
     19 <tr>
     20 <td  colspan=4 align="center">Memory management</td>
     21 </tr>
     22 
     23 <tr>
     24 <td>
     25 <p>
     26 <code>void* __cxa_allocate_exception(size_t thrown_size) throw();</code>
     27 </p>
     28 <blockquote>
     29 <p>
     30 <i>Effects:</i> Allocates memory to hold the exception to be thrown.
     31 <tt>thrown_size</tt> is the size of the exception object. Can allocate
     32 additional memory to hold private data. If memory can not be allocated, call
     33 <tt>std::terminate()</tt>.
     34 </p>
     35 <p>
     36 <i>Returns:</i> A pointer to the memory allocated for the exception object.
     37 </p>
     38 </blockquote>
     39 </td>
     40 <td>&#10003;</td>
     41 <td>&#10003;</td>
     42 <td>&#10003;</td>
     43 </tr>
     44 
     45 <tr>
     46 <td>
     47 <p>
     48 <code>void __cxa_free_exception(void * thrown_exception) throw();</code>
     49 </p>
     50 <blockquote>
     51 <p>
     52 <i>Effects:</i> Frees memory allocated by <tt>__cxa_allocate_exception</tt>.
     53 </p>
     54 </blockquote>
     55 </td>
     56 <td>&#10003;</td>
     57 <td>&#10003;</td>
     58 <td>&#10003;</td>
     59 </tr>
     60 
     61 <tr>
     62 <td>
     63 <p>
     64 <code>void* __cxa_allocate_dependent_exception() throw();</code>
     65 </p>
     66 <blockquote>
     67 <p>
     68 <i>Effects:</i> Allocates memory to hold a "dependent" exception to be thrown.
     69 <tt>thrown_size</tt> is the size of the exception object. Can allocate
     70 additional memory to hold private data. If memory can not be allocated, call
     71 <tt>std::terminate()</tt>.
     72 </p>
     73 <p>
     74 <i>Returns:</i> A pointer to the memory allocated for the exception object.
     75 </p>
     76 </blockquote>
     77 </td>
     78 <td>&#10003;</td>
     79 <td>&#10003;</td>
     80 <td>&#10003;</td>
     81 </tr>
     82 
     83 <tr>
     84 <td>
     85 <p>
     86 <code>void __cxa_free_dependent_exception (void* dependent_exception) throw();</code>
     87 </p>
     88 <blockquote>
     89 <p>
     90 <i>Effects:</i> Frees memory allocated by <tt>__cxa_allocate_dependent_exception</tt>.
     91 </p>
     92 </blockquote>
     93 </td>
     94 <td>&#10003;</td>
     95 <td>&#10003;</td>
     96 <td>&#10003;</td>
     97 </tr>
     98 
     99 <tr>
    100 <td  colspan=4 align="center">Exception Handling</td>
    101 </tr>
    102 
    103 <tr>
    104 <td>
    105 <p>
    106 <code>void __cxa_throw(void* thrown_exception, struct std::type_info * tinfo, 
    107                         void (*dest)(void*));</code>
    108 </p>
    109 <blockquote>
    110 <p>
    111 <i>Effects:</i>
    112 </p>
    113 </blockquote>
    114 </td>
    115 <td>&#10003;</td>
    116 <td>&#10003;</td>
    117 <td>&#10003;</td>
    118 </tr>
    119 
    120 <tr>
    121 <td>
    122 <p>
    123 <code>void* __cxa_get_exception_ptr(void* exceptionObject) throw();</code>
    124 </p>
    125 <blockquote>
    126 <p>
    127 <i>Returns:</i> The adjusted pointer to the exception object. (The adjusted
    128 pointer is typically computed by the personality routine during phase 1 and
    129 saved in the exception object.)
    130 </p>
    131 </blockquote>
    132 </td>
    133 <td>&#10003;</td>
    134 <td>&#10003;</td>
    135 <td>&#10003;</td>
    136 </tr>
    137 
    138 <tr>
    139 <td>
    140 <p>
    141 <code>void* __cxa_begin_catch(void* exceptionObject) throw();</code>
    142 </p>
    143 <blockquote>
    144 <p>
    145 <i>Effects:</i>
    146 </p>
    147 <ul>
    148 <li>Increment's the exception's handler count.</li>
    149 <li>Places the exception on the stack of currently-caught exceptions if it is
    150 not already there, linking the exception to the previous top of the stack.</li>
    151 <li>Decrements the uncaught_exception count.</li>
    152 </ul>
    153 <p>
    154 If the initialization of the catch parameter is trivial (e,g., there is no
    155 formal catch parameter, or the parameter has no copy constructor), the calls to
    156 <tt>__cxa_get_exception_ptr()</tt> and <tt>__cxa_begin_catch()</tt> may be
    157 combined into a single call to <tt>__cxa_begin_catch()</tt>.
    158 </p>
    159 <p>
    160 When the personality routine encounters a termination condition, it will call
    161 <tt>__cxa_begin_catch()</tt> to mark the exception as handled and then call
    162 <tt>terminate()</tt>, which shall not return to its caller.
    163 </p>
    164 <p>
    165 <i>Returns:</i> The adjusted pointer to the exception object.
    166 </p>
    167 </blockquote>
    168 </td>
    169 <td>&#10003;</td>
    170 <td>&#10003;</td>
    171 <td>&#10003;</td>
    172 </tr>
    173 
    174 <tr>
    175 <td>
    176 <p>
    177 <code>void __cxa_end_catch();</code>
    178 </p>
    179 <blockquote>
    180 <p>
    181 <i>Effects:</i> Locates the most recently caught exception and decrements its
    182 handler count. Removes the exception from the caughtexception stack, if the
    183 handler count goes to zero. Destroys the exception if the handler count goes to
    184 zero, and the exception was not re-thrown by throw. Collaboration between
    185 __cxa_rethrow() and __cxa_end_catch() is necessary to handle the last point.
    186 Though implementation-defined, one possibility is for __cxa_rethrow() to set a
    187 flag in the handlerCount member of the exception header to mark an exception
    188 being rethrown.
    189 </p>
    190 </blockquote>
    191 </td>
    192 <td>&#10003;</td>
    193 <td>&#10003;</td>
    194 <td>&#10003;</td>
    195 </tr>
    196 
    197 <tr>
    198 <td>
    199 <p>
    200 <code>std::type_info* __cxa_current_exception_type();</code>
    201 </p>
    202 <blockquote>
    203 <p>
    204 <i>Returns:</i> the type of the currently handled exception, or null if there
    205 are no caught exceptions.
    206 </p>
    207 </blockquote>
    208 </td>
    209 <td>&#10003;</td>
    210 <td>&#10003;</td>
    211 <td>&#10003;</td>
    212 </tr>
    213 
    214 <tr>
    215 <td>
    216 <p>
    217 <code>void __cxa_rethrow();</code>
    218 </p>
    219 <blockquote>
    220 <p>
    221 <i>Effects:</i> Marks the exception object on top of the caughtExceptions stack
    222 (in an implementation-defined way) as being rethrown. If the caughtExceptions
    223 stack is empty, it calls terminate() (see [C++FDIS] [except.throw], 15.1.8). It
    224 then returns to the handler that called it, which must call __cxa_end_catch(),
    225 perform any necessary cleanup, and finally call _Unwind_Resume() to continue
    226 unwinding.
    227 </p>
    228 </blockquote>
    229 </td>
    230 <td>&#10003;</td>
    231 <td>&#10003;</td>
    232 <td>&#10003;</td>
    233 </tr>
    234 
    235 <tr>
    236 <td>
    237 <p>
    238 <code>void* __cxa_current_primary_exception() throw();</code>
    239 </p>
    240 <blockquote>
    241 <p>
    242 <i>Effects:</i> Increments the ownership count of the currently handled
    243 exception (if any) by one.
    244 </p>
    245 <p>
    246 <i>Returns:</i> the type of the currently handled exception, or null if there
    247 are no caught exceptions.  
    248 </p>
    249 </blockquote>
    250 </td>
    251 <td>&#10003;</td>
    252 <td>&#10003;</td>
    253 <td>&#10003;</td>
    254 </tr>
    255 
    256 <tr>
    257 <td>
    258 <p>
    259 <code>void __cxa_decrement_exception_refcount(void* primary_exception) throw();</code>
    260 </p>
    261 <blockquote>
    262 <p>
    263 <i>Effects:</i> Decrements the ownership count of the exception by 1, and on
    264 zero calls <tt>_Unwind_DeleteException</tt> with the exception object.
    265 </p>
    266 </blockquote>
    267 </td>
    268 <td>&#10003;</td>
    269 <td>&#10003;</td>
    270 <td>&#10003;</td>
    271 </tr>
    272 
    273 <tr>
    274 <td>
    275 <p>
    276 <code>__cxa_eh_globals* __cxa_get_globals() throw();</code>
    277 </p>
    278 <blockquote>
    279 <p>
    280 <i>Returns:</i> A pointer to the __cxa_eh_globals structure for the current
    281 thread, initializing it if necessary.
    282 </p>
    283 </blockquote>
    284 </td>
    285 <td>&#10003;</td>
    286 <td>&#10003;</td>
    287 <td>&#10003;</td>
    288 </tr>
    289 
    290 <tr>
    291 <td>
    292 <p>
    293 <code>__cxa_eh_globals* __cxa_get_globals_fast() throw();</code>
    294 </p>
    295 <blockquote>
    296 <p>
    297 <i>Requires:</i> At least one prior call to __cxa_get_globals has been made from
    298 the current thread.
    299 </p>
    300 <p>
    301 <i>Returns:</i> A pointer to the __cxa_eh_globals structure for the current
    302 thread.
    303 </p>
    304 </blockquote>
    305 </td>
    306 <td>&#10003;</td>
    307 <td>&#10003;</td>
    308 <td>&#10003;</td>
    309 </tr>
    310 
    311 <tr>
    312 <td>
    313 <p>
    314 <code>void __cxa_increment_exception_refcount(void* primary_exception) throw();</code>
    315 </p>
    316 <blockquote>
    317 <p>
    318 <i>Effects:</i> Increments the ownership count of the referenced exception.
    319 </p>
    320 </blockquote>
    321 </td>
    322 <td>&#10003;</td>
    323 <td>&#10003;</td>
    324 <td>&#10003;</td>
    325 </tr>
    326 
    327 <tr>
    328 <td>
    329 <p>
    330 <code>void __cxa_rethrow_primary_exception(void* primary_exception);</code>
    331 </p>
    332 <blockquote>
    333 <p>
    334 <i>Effects:</i> Implements <tt>std::rethrow_exception(exception_ptr p)</tt>.
    335 </p>
    336 </blockquote>
    337 </td>
    338 <td>&#10003;</td>
    339 <td>&#10003;</td>
    340 <td>&#10003;</td>
    341 </tr>
    342 
    343 <tr>
    344 <td>
    345 <p>
    346 <code>bool __cxa_uncaught_exception() throw();</code>
    347 </p>
    348 <blockquote>
    349 <p>
    350 <i>Effects:</i>
    351 </p>
    352 <p>
    353 <i>Returns:</i>
    354 </p>
    355 </blockquote>
    356 </td>
    357 <td>&#10003;</td>
    358 <td>&#10003;</td>
    359 <td>&#10003;</td>
    360 </tr>
    361 
    362 <tr>
    363 <td>
    364 <p>
    365 <code>_Unwind_Reason_Code __gxx_personality_v0
    366      (int, _Unwind_Action, _Unwind_Exception_Class,
    367       struct _Unwind_Exception *, struct _Unwind_Context *);</code>
    368 </p>
    369 <blockquote>
    370 <p>
    371 <i>Effects:</i>
    372 </p>
    373 <p>
    374 <i>Returns:</i>
    375 </p>
    376 </blockquote>
    377 </td>
    378 <td>&#10003;</td>
    379 <td>&#10003;</td>
    380 <td>&#10003;</td>
    381 </tr>
    382 
    383 <tr>
    384 <td colspan=4 align="center">Guard objects</td>
    385 </tr>
    386 
    387 <tr>
    388 <td>
    389 <p>
    390 <code>int  __cxa_guard_acquire(uint64_t* guard_object);</code>
    391 </p>
    392 <blockquote>
    393 <p>
    394 <i>Effects:</i> This function is called before initialization takes place. If
    395 this function returns 1, either <code>__cxa_guard_release</code> or
    396 <code>__cxa_guard_abort</code> must be called with the same argument. The first
    397 byte of the <code>guard_object</code> is not modified by this function.
    398 </p>
    399 <p>
    400 On Darwin the implementation checks for deadlock.
    401 </p>
    402 <p>
    403 <i>Returns:</i> 1 if the initialization is not yet complete, otherwise 0.
    404 </p>
    405 </blockquote>
    406 </td>
    407 <td>&#10003;</td>
    408 <td>&#10003;</td>
    409 <td>&#10003;</td>
    410 </tr>
    411 
    412 <tr>
    413 <td>
    414 <p>
    415 <code>void __cxa_guard_release(uint64_t*);</code>
    416 </p>
    417 <blockquote>
    418 <p>
    419 <i>Effects:</i> Sets the first byte of the guard object to a non-zero value.
    420 This function is called after initialization is complete. A thread-safe
    421 implementation will release the mutex acquired by __cxa_guard_acquire after
    422 setting the first byte of the guard object.
    423 </p>
    424 </blockquote>
    425 </td>
    426 <td>&#10003;</td>
    427 <td>&#10003;</td>
    428 <td>&#10003;</td>
    429 </tr>
    430 
    431 <tr>
    432 <td>
    433 <p>
    434 <code>void __cxa_guard_abort(uint64_t*);</code>
    435 </p>
    436 <blockquote>
    437 <p>
    438 <i>Effects:</i> This function is called if the initialization terminates by
    439 throwing an exception.
    440 </p>
    441 </blockquote>
    442 </td>
    443 <td>&#10003;</td>
    444 <td>&#10003;</td>
    445 <td>&#10003;</td>
    446 </tr>
    447 
    448 <tr>
    449 <td colspan=4 align="center">Vector construction and destruction</td>
    450 </tr>
    451 
    452 <tr>
    453 <td>
    454 <p>
    455 <code>void* __cxa_vec_new(size_t element_count, 
    456 						   size_t element_size, 
    457                            size_t padding_size, 
    458 						   void (*constructor)(void*),
    459 						   void (*destructor)(void*) );</code>
    460 </p>
    461 <blockquote>
    462 <p>
    463 <i>Effects:</i>
    464 </p>
    465 <p>
    466 <i>Returns:</i>
    467 </p>
    468 </blockquote>
    469 </td>
    470 <td>&#10003;</td>
    471 <td>&#10003;</td>
    472 <td>&#10003;</td>
    473 </tr>
    474 
    475 <tr>
    476 <td>
    477 <p>
    478 <code>void* __cxa_vec_new2(size_t element_count,
    479  						    size_t element_size, 
    480                             size_t padding_size,
    481 						    void  (*constructor)(void*),
    482 						    void  (*destructor)(void*),
    483                             void* (*alloc)(size_t), 
    484                             void  (*dealloc)(void*) );</code>
    485 </p>
    486 <blockquote>
    487 <p>
    488 <i>Effects:</i>
    489 </p>
    490 <p>
    491 <i>Returns:</i>
    492 </p>
    493 </blockquote>
    494 </td>
    495 <td>&#10003;</td>
    496 <td>&#10003;</td>
    497 <td>&#10003;</td>
    498 </tr>
    499 
    500 <tr>
    501 <td>
    502 <p>
    503 <code>void* __cxa_vec_new3(size_t element_count,
    504  						    size_t element_size, 
    505                             size_t padding_size,
    506 						    void  (*constructor)(void*),
    507 						    void  (*destructor)(void*),
    508                             void* (*alloc)(size_t), 
    509                             void  (*dealloc)(void*, size_t) );</code>
    510 </p>
    511 <blockquote>
    512 <p>
    513 <i>Effects:</i>
    514 </p>
    515 <p>
    516 <i>Returns:</i>
    517 </p>
    518 </blockquote>
    519 </td>
    520 <td>&#10003;</td>
    521 <td>&#10003;</td>
    522 <td>&#10003;</td>
    523 </tr>
    524 
    525 <tr>
    526 <td>
    527 <p>
    528 <code>void __cxa_vec_ctor(void*  array_address, 
    529                            size_t element_count,
    530                            size_t element_size, 
    531 						   void (*constructor)(void*),
    532 						   void (*destructor)(void*) );</code>
    533 </p>
    534 <blockquote>
    535 <p>
    536 <i>Effects:</i>
    537 </p>
    538 </blockquote>
    539 </td>
    540 <td>&#10003;</td>
    541 <td>&#10003;</td>
    542 <td>&#10003;</td>
    543 </tr>
    544 
    545 <tr>
    546 <td>
    547 <p>
    548 <code>void __cxa_vec_dtor(void*  array_address, 
    549                            size_t element_count,
    550 						   size_t element_size, 
    551 						   void (*destructor)(void*) );</code>
    552 </p>
    553 <blockquote>
    554 <p>
    555 <i>Effects:</i>
    556 </p>
    557 </blockquote>
    558 </td>
    559 <td>&#10003;</td>
    560 <td>&#10003;</td>
    561 <td>&#10003;</td>
    562 </tr>
    563 
    564 <tr>
    565 <td>
    566 <p>
    567 <code>void __cxa_vec_cleanup(void* array_address, 
    568                              size_t element_count,
    569                              size_t element_size, 
    570 						     void (*destructor)(void*) );</code>
    571 </p>
    572 <blockquote>
    573 <p>
    574 <i>Effects:</i>
    575 </p>
    576 </blockquote>
    577 </td>
    578 <td>&#10003;</td>
    579 <td>&#10003;</td>
    580 <td>&#10003;</td>
    581 </tr>
    582 
    583 <tr>
    584 <td>
    585 <p>
    586 <code>void __cxa_vec_delete(void*  array_address, 
    587                              size_t element_size, 
    588                              size_t padding_size, 
    589 						     void  (*destructor)(void*) );</code>
    590 </p>
    591 <blockquote>
    592 <p>
    593 <i>Effects:</i>
    594 </p>
    595 </blockquote>
    596 </td>
    597 <td>&#10003;</td>
    598 <td>&#10003;</td>
    599 <td>&#10003;</td>
    600 </tr>
    601 
    602 <tr>
    603 <td>
    604 <p>
    605 <code>void __cxa_vec_delete2(void* array_address, 
    606                              size_t element_size, 
    607                              size_t padding_size, 
    608 						     void  (*destructor)(void*),
    609                              void  (*dealloc)(void*) );</code>
    610 </p>
    611 <blockquote>
    612 <p>
    613 <i>Effects:</i>
    614 </p>
    615 </blockquote>
    616 </td>
    617 <td>&#10003;</td>
    618 <td>&#10003;</td>
    619 <td>&#10003;</td>
    620 </tr>
    621 
    622 <tr>
    623 <td>
    624 <p>
    625 <code>void __cxa_vec_delete3(void* __array_address, 
    626                              size_t element_size, 
    627                              size_t padding_size, 
    628 						     void  (*destructor)(void*),
    629 							 void  (*dealloc) (void*, size_t));</code>
    630 </p>
    631 <blockquote>
    632 <p>
    633 <i>Effects:</i>
    634 </p>
    635 </blockquote>
    636 </td>
    637 <td>&#10003;</td>
    638 <td>&#10003;</td>
    639 <td>&#10003;</td>
    640 </tr>
    641 
    642 <tr>
    643 <td>
    644 <p>
    645 <code>void __cxa_vec_cctor(void*  dest_array, 
    646 							void*  src_array, 
    647 							size_t element_count, 
    648 							size_t element_size, 
    649 							void  (*constructor) (void*, void*), 
    650 							void  (*destructor)(void*) );</code>
    651 </p>
    652 <blockquote>
    653 <p>
    654 <i>Effects:</i>
    655 </p>
    656 </blockquote>
    657 </td>
    658 <td>&#10003;</td>
    659 <td>&#10003;</td>
    660 <td>&#10003;</td>
    661 </tr>
    662 
    663 <tr>
    664 <td colspan=4 align="center">Handlers</td>
    665 </tr>
    666 
    667 <tr>
    668 <td>
    669 <p>
    670 <code>void (*__cxa_new_handler)();</code>
    671 </p>
    672 <blockquote>
    673 <p>
    674 The currently installed new handler.
    675 </p>
    676 </blockquote>
    677 </td>
    678 <td>&#10003;</td>
    679 <td>&#10003;</td>
    680 <td>&#10003;</td>
    681 </tr>
    682 
    683 <tr>
    684 <td>
    685 <p>
    686 <code>void (*__cxa_terminate_handler)();</code>
    687 </p>
    688 <blockquote>
    689 <p>
    690 The currently installed terminate handler.
    691 </p>
    692 </blockquote>
    693 </td>
    694 <td>&#10003;</td>
    695 <td>&#10003;</td>
    696 <td>&#10003;</td>
    697 </tr>
    698 
    699 <tr>
    700 <td>
    701 <p>
    702 <code>void (*__cxa_unexpected_handler)();</code>
    703 </p>
    704 <blockquote>
    705 <p>
    706 <i>Effects:</i>
    707 </p>
    708 </blockquote>
    709 </td>
    710 <td>&#10003;</td>
    711 <td>&#10003;</td>
    712 <td>&#10003;</td>
    713 </tr>
    714 
    715 
    716 
    717 <tr>
    718 <td colspan=4 align="center">Utilities</td>
    719 </tr>
    720 
    721 <tr>
    722 <td>
    723 <p>
    724 <code>[[noreturn]] void __cxa_bad_cast()</code>
    725 </p>
    726 <blockquote>
    727 <p>
    728 <i>Effects:</i>  Throws an exception of type <tt>bad_cast</tt>.
    729 </p>
    730 </blockquote>
    731 </td>
    732 <td>&#10003;</td>
    733 <td>&#10003;</td>
    734 <td>&#10003;</td>
    735 </tr>
    736 
    737 <tr>
    738 <td>
    739 <p>
    740 <code>[[noreturn]] void __cxa_bad_typeid();</code>
    741 </p>
    742 <blockquote>
    743 <p>
    744 <i>Effects:</i>  Throws an exception of type <tt>bad_typeid</tt>.
    745 </p>
    746 </blockquote>
    747 </td>
    748 <td>&#10003;</td>
    749 <td>&#10003;</td>
    750 <td>&#10003;</td>
    751 </tr>
    752 
    753 <tr>
    754 <td>
    755 <p>
    756 <code>void __cxa_pure_virtual(void);</code>
    757 </p>
    758 <blockquote>
    759 <p>
    760 <i>Effects:</i> Called if the user calls a non-overridden pure virtual function,
    761 which has undefined behavior according to the C++ Standard. Ends the program.
    762 </p>
    763 </blockquote>
    764 </td>
    765 <td>&#10003;</td>
    766 <td>&#10003;</td>
    767 <td>&#10003;</td>
    768 </tr>
    769 
    770 <tr>
    771 <td>
    772 <p>
    773 <code>void __cxa_call_unexpected (void*) __attribute__((noreturn));</code>
    774 </p>
    775 <blockquote>
    776 <p>
    777 <i>Effects:</i> Handles re-checking the exception specification if
    778 unexpectedHandler throws, and if <tt>bad_exception</tt> needs to be thrown. 
    779 Called from the compiler.
    780 </p>
    781 </blockquote>
    782 </td>
    783 <td>&#10003;</td>
    784 <td>&#10003;</td>
    785 <td>&#10003;</td>
    786 </tr>
    787 
    788 <tr>
    789 <td>
    790 <p>
    791 <code>char* __cxa_demangle(const char* mangled_name, 
    792 							char*       output_buffer,
    793 							size_t*     length, 
    794 							int*        status);</code>
    795 </p>
    796 <blockquote>
    797 <p>
    798 <i>Effects:</i> 
    799 </p>
    800 <p>
    801 <i>Returns:</i>
    802 </p>
    803 </blockquote>
    804 </td>
    805 <td>&#10003;</td>
    806 <td>&#10003;</td>
    807 <td>&#10003;</td>
    808 </tr>
    809 
    810 <tr>
    811 <td>
    812 <p>
    813 <code>void*
    814   __dynamic_cast(const void* __src_ptr,
    815 		 const __class_type_info* __src_type,
    816 		 const __class_type_info* __dst_type,
    817 		 ptrdiff_t __src2dst);</code>
    818 </p>
    819 <blockquote>
    820 <p>
    821 <i>Effects:</i>
    822 </p>
    823 <p>
    824 <i>Returns:</i>
    825 </p>
    826 </blockquote>
    827 </td>
    828 <td>&#10003;</td>
    829 <td>&#10003;</td>
    830 <td>&#10003;</td>
    831 </tr>
    832 
    833 </table>
    834 
    835 <!-- 
    836 000000000000d570 (__DATA,__const) external typeinfo for char32_t
    837 000000000000cfd0 (__DATA,__const) external typeinfo for std::nullptr_t
    838 000000000000d520 (__DATA,__const) external typeinfo for char16_t
    839 000000000000d580 (__DATA,__const) external typeinfo for char32_t*
    840 000000000000cfe0 (__DATA,__const) external typeinfo for std::nullptr_t*
    841 000000000000d530 (__DATA,__const) external typeinfo for char16_t*
    842 000000000000d5a0 (__DATA,__const) external typeinfo for char32_t const*
    843 000000000000d000 (__DATA,__const) external typeinfo for std::nullptr_t const*
    844 000000000000d550 (__DATA,__const) external typeinfo for char16_t const*
    845 000000000000d190 (__DATA,__const) external typeinfo for signed char const*
    846 000000000000d050 (__DATA,__const) external typeinfo for bool const*
    847 000000000000d0f0 (__DATA,__const) external typeinfo for char const*
    848 000000000000d4b0 (__DATA,__const) external typeinfo for double const*
    849 000000000000d500 (__DATA,__const) external typeinfo for long double const*
    850 000000000000d460 (__DATA,__const) external typeinfo for float const*
    851 000000000000d140 (__DATA,__const) external typeinfo for unsigned char const*
    852 000000000000d280 (__DATA,__const) external typeinfo for int const*
    853 000000000000d2d0 (__DATA,__const) external typeinfo for unsigned int const*
    854 000000000000d320 (__DATA,__const) external typeinfo for long const*
    855 000000000000d370 (__DATA,__const) external typeinfo for unsigned long const*
    856 000000000000d1e0 (__DATA,__const) external typeinfo for short const*
    857 000000000000d230 (__DATA,__const) external typeinfo for unsigned short const*
    858 000000000000cfb0 (__DATA,__const) external typeinfo for void const*
    859 000000000000d0a0 (__DATA,__const) external typeinfo for wchar_t const*
    860 000000000000d3c0 (__DATA,__const) external typeinfo for long long const*
    861 000000000000d410 (__DATA,__const) external typeinfo for unsigned long long const*
    862 000000000000d170 (__DATA,__const) external typeinfo for signed char*
    863 000000000000d030 (__DATA,__const) external typeinfo for bool*
    864 000000000000d0d0 (__DATA,__const) external typeinfo for char*
    865 000000000000d490 (__DATA,__const) external typeinfo for double*
    866 000000000000d4e0 (__DATA,__const) external typeinfo for long double*
    867 000000000000d440 (__DATA,__const) external typeinfo for float*
    868 000000000000d120 (__DATA,__const) external typeinfo for unsigned char*
    869 000000000000d260 (__DATA,__const) external typeinfo for int*
    870 000000000000d2b0 (__DATA,__const) external typeinfo for unsigned int*
    871 000000000000d300 (__DATA,__const) external typeinfo for long*
    872 000000000000d350 (__DATA,__const) external typeinfo for unsigned long*
    873 000000000000d1c0 (__DATA,__const) external typeinfo for short*
    874 000000000000d210 (__DATA,__const) external typeinfo for unsigned short*
    875 000000000000cf90 (__DATA,__const) external typeinfo for void*
    876 000000000000d080 (__DATA,__const) external typeinfo for wchar_t*
    877 000000000000d3a0 (__DATA,__const) external typeinfo for long long*
    878 000000000000d3f0 (__DATA,__const) external typeinfo for unsigned long long*
    879 000000000000d160 (__DATA,__const) external typeinfo for signed char
    880 000000000000d020 (__DATA,__const) external typeinfo for bool
    881 000000000000d0c0 (__DATA,__const) external typeinfo for char
    882 000000000000d480 (__DATA,__const) external typeinfo for double
    883 000000000000d4d0 (__DATA,__const) external typeinfo for long double
    884 000000000000d430 (__DATA,__const) external typeinfo for float
    885 000000000000d110 (__DATA,__const) external typeinfo for unsigned char
    886 000000000000d250 (__DATA,__const) external typeinfo for int
    887 000000000000d2a0 (__DATA,__const) external typeinfo for unsigned int
    888 000000000000d2f0 (__DATA,__const) external typeinfo for long
    889 000000000000d340 (__DATA,__const) external typeinfo for unsigned long
    890 000000000000d1b0 (__DATA,__const) external typeinfo for short
    891 000000000000d200 (__DATA,__const) external typeinfo for unsigned short
    892 000000000000cf78 (__DATA,__const) external typeinfo for void
    893 000000000000d070 (__DATA,__const) external typeinfo for wchar_t
    894 000000000000d390 (__DATA,__const) external typeinfo for long long
    895 000000000000d3e0 (__DATA,__const) external typeinfo for unsigned long long
    896 00000000000093f9 (__TEXT,__cstring) external typeinfo name for char32_t
    897 0000000000009351 (__TEXT,__cstring) external typeinfo name for std::nullptr_t
    898 00000000000093ed (__TEXT,__cstring) external typeinfo name for char16_t
    899 0000000000009470 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__enum_type_info
    900 0000000000009410 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__array_type_info
    901 0000000000009290 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__class_type_info
    902 00000000000094a0 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__pbase_type_info
    903 00000000000094d0 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__pointer_type_info
    904 0000000000009440 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__function_type_info
    905 00000000000092c0 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__si_class_type_info
    906 00000000000092f0 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__vmi_class_type_info
    907 0000000000009320 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__fundamental_type_info
    908 0000000000009500 (__TEXT,__cstring) external typeinfo name for __cxxabiv1::__pointer_to_member_type_info
    909 00000000000093fc (__TEXT,__cstring) external typeinfo name for char32_t*
    910 0000000000009354 (__TEXT,__cstring) external typeinfo name for std::nullptr_t*
    911 00000000000093f0 (__TEXT,__cstring) external typeinfo name for char16_t*
    912 0000000000009400 (__TEXT,__cstring) external typeinfo name for char32_t const*
    913 0000000000009358 (__TEXT,__cstring) external typeinfo name for std::nullptr_t const*
    914 00000000000093f4 (__TEXT,__cstring) external typeinfo name for char16_t const*
    915 0000000000009386 (__TEXT,__cstring) external typeinfo name for signed char const*
    916 0000000000009362 (__TEXT,__cstring) external typeinfo name for bool const*
    917 0000000000009374 (__TEXT,__cstring) external typeinfo name for char const*
    918 00000000000093e0 (__TEXT,__cstring) external typeinfo name for double const*
    919 00000000000093e9 (__TEXT,__cstring) external typeinfo name for long double const*
    920 00000000000093d7 (__TEXT,__cstring) external typeinfo name for float const*
    921 000000000000937d (__TEXT,__cstring) external typeinfo name for unsigned char const*
    922 00000000000093a1 (__TEXT,__cstring) external typeinfo name for int const*
    923 00000000000093aa (__TEXT,__cstring) external typeinfo name for unsigned int const*
    924 00000000000093b3 (__TEXT,__cstring) external typeinfo name for long const*
    925 00000000000093bc (__TEXT,__cstring) external typeinfo name for unsigned long const*
    926 000000000000938f (__TEXT,__cstring) external typeinfo name for short const*
    927 0000000000009398 (__TEXT,__cstring) external typeinfo name for unsigned short const*
    928 000000000000934d (__TEXT,__cstring) external typeinfo name for void const*
    929 000000000000936b (__TEXT,__cstring) external typeinfo name for wchar_t const*
    930 00000000000093c5 (__TEXT,__cstring) external typeinfo name for long long const*
    931 00000000000093ce (__TEXT,__cstring) external typeinfo name for unsigned long long const*
    932 0000000000009383 (__TEXT,__cstring) external typeinfo name for signed char*
    933 000000000000935f (__TEXT,__cstring) external typeinfo name for bool*
    934 0000000000009371 (__TEXT,__cstring) external typeinfo name for char*
    935 00000000000093dd (__TEXT,__cstring) external typeinfo name for double*
    936 00000000000093e6 (__TEXT,__cstring) external typeinfo name for long double*
    937 00000000000093d4 (__TEXT,__cstring) external typeinfo name for float*
    938 000000000000937a (__TEXT,__cstring) external typeinfo name for unsigned char*
    939 000000000000939e (__TEXT,__cstring) external typeinfo name for int*
    940 00000000000093a7 (__TEXT,__cstring) external typeinfo name for unsigned int*
    941 00000000000093b0 (__TEXT,__cstring) external typeinfo name for long*
    942 00000000000093b9 (__TEXT,__cstring) external typeinfo name for unsigned long*
    943 000000000000938c (__TEXT,__cstring) external typeinfo name for short*
    944 0000000000009395 (__TEXT,__cstring) external typeinfo name for unsigned short*
    945 000000000000934a (__TEXT,__cstring) external typeinfo name for void*
    946 0000000000009368 (__TEXT,__cstring) external typeinfo name for wchar_t*
    947 00000000000093c2 (__TEXT,__cstring) external typeinfo name for long long*
    948 00000000000093cb (__TEXT,__cstring) external typeinfo name for unsigned long long*
    949 0000000000009381 (__TEXT,__cstring) external typeinfo name for signed char
    950 000000000000935d (__TEXT,__cstring) external typeinfo name for bool
    951 000000000000936f (__TEXT,__cstring) external typeinfo name for char
    952 00000000000093db (__TEXT,__cstring) external typeinfo name for double
    953 00000000000093e4 (__TEXT,__cstring) external typeinfo name for long double
    954 00000000000093d2 (__TEXT,__cstring) external typeinfo name for float
    955 0000000000009378 (__TEXT,__cstring) external typeinfo name for unsigned char
    956 000000000000939c (__TEXT,__cstring) external typeinfo name for int
    957 00000000000093a5 (__TEXT,__cstring) external typeinfo name for unsigned int
    958 00000000000093ae (__TEXT,__cstring) external typeinfo name for long
    959 00000000000093b7 (__TEXT,__cstring) external typeinfo name for unsigned long
    960 000000000000938a (__TEXT,__cstring) external typeinfo name for short
    961 0000000000009393 (__TEXT,__cstring) external typeinfo name for unsigned short
    962 0000000000009348 (__TEXT,__cstring) external typeinfo name for void
    963 0000000000009366 (__TEXT,__cstring) external typeinfo name for wchar_t
    964 00000000000093c0 (__TEXT,__cstring) external typeinfo name for long long
    965 00000000000093c9 (__TEXT,__cstring) external typeinfo name for unsigned long long
    966 000000000000ce30 (__DATA,__const) external vtable for __cxxabiv1::__enum_type_info
    967 000000000000cdb0 (__DATA,__const) external vtable for __cxxabiv1::__array_type_info
    968 000000000000cbe0 (__DATA,__const) external vtable for __cxxabiv1::__class_type_info
    969 000000000000ce70 (__DATA,__const) external vtable for __cxxabiv1::__pbase_type_info
    970 000000000000cec0 (__DATA,__const) external vtable for __cxxabiv1::__pointer_type_info
    971 000000000000cdf0 (__DATA,__const) external vtable for __cxxabiv1::__function_type_info
    972 000000000000cc40 (__DATA,__const) external vtable for __cxxabiv1::__si_class_type_info
    973 000000000000cca0 (__DATA,__const) external vtable for __cxxabiv1::__vmi_class_type_info
    974 000000000000cd70 (__DATA,__const) external vtable for __cxxabiv1::__fundamental_type_info
    975 000000000000cf10 (__DATA,__const) external vtable for __cxxabiv1::__pointer_to_member_type_info
    976 
    977                  (undefined) external ___stack_chk_fail (from libSystem)
    978                  (undefined) external ___stack_chk_guard (from libSystem)
    979                  (undefined) external ___stderrp (from libSystem)
    980                  (undefined) external ___strcat_chk (from libSystem)
    981                  (undefined) external _abort (from libSystem)
    982                  (undefined) external _calloc (from libSystem)
    983                  (undefined) external _dlsym (from libSystem)
    984                  (undefined) external _free (from libSystem)
    985                  (undefined) external _malloc (from libSystem)
    986                  (undefined) external _memcpy (from libSystem)
    987                  (undefined) external _pthread_getspecific (from libSystem)
    988                  (undefined) external _pthread_key_create (from libSystem)
    989                  (undefined) external _pthread_mutex_init (from libSystem)
    990                  (undefined) external _pthread_mutex_lock (from libSystem)
    991                  (undefined) external _pthread_mutex_unlock (from libSystem)
    992                  (undefined) external _pthread_mutexattr_init (from libSystem)
    993                  (undefined) external _pthread_mutexattr_settype (from libSystem)
    994                  (undefined) external _pthread_once (from libSystem)
    995                  (undefined) external _pthread_setspecific (from libSystem)
    996                  (undefined) external _realloc (from libSystem)
    997                  (undefined) external _strcmp (from libSystem)
    998                  (undefined) external _strcpy (from libSystem)
    999                  (undefined) external _strlen (from libSystem)
   1000                  (undefined) external _strncmp (from libSystem)
   1001                  (undefined) external _vasprintf (from libSystem)
   1002                  (undefined) external _vfprintf (from libSystem)
   1003                  (undefined) external dyld_stub_binder (from libSystem)
   1004                  (undefined) external __Unwind_DeleteException (from libSystem)
   1005                  (undefined) external __Unwind_GetIP (from libSystem)
   1006                  (undefined) external __Unwind_GetLanguageSpecificData (from libSystem)
   1007                  (undefined) external __Unwind_GetRegionStart (from libSystem)
   1008                  (undefined) external __Unwind_RaiseException (from libSystem)
   1009                  (undefined) external __Unwind_Resume_or_Rethrow (from libSystem)
   1010                  (undefined) external __Unwind_SetGR (from libSystem)
   1011                  (undefined) external __Unwind_SetIP (from libSystem)
   1012                  (undefined) external ___bzero (from libSystem)
   1013  -->
   1014 
   1015 </body>
   1016 </html>
   1017