dlls/msvcrt/cpp.c

   1 /*
   2  * msvcrt.dll C++ objects
   3  *
   4  * Copyright 2000 Jon Griffiths
   5  * Copyright 2003, 2004 Alexandre Julliard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdarg.h>
  26
  27 #include "windef.h"
  28 #include "winternl.h"
  29 #include "wine/exception.h"
  30 #include "wine/debug.h"
  31 #include "msvcrt.h"
  32 #include "cppexcept.h"
  33 #include "mtdll.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  36
  37 typedef exception bad_cast;
  38 typedef exception bad_typeid;
  39 typedef exception __non_rtti_object;
  40
  41 typedef struct _rtti_base_descriptor
  42 {
  43   const type_info *type_descriptor;
  44   int num_base_classes;
  45   this_ptr_offsets offsets;    /* offsets for computing the this pointer */
  46   unsigned int attributes;
  47 } rtti_base_descriptor;
  48
  49 typedef struct _rtti_base_array
  50 {
  51   const rtti_base_descriptor *bases[3]; /* First element is the class itself */
  52 } rtti_base_array;
  53
  54 typedef struct _rtti_object_hierarchy
  55 {
  56   unsigned int signature;
  57   unsigned int attributes;
  58   int array_len; /* Size of the array pointed to by 'base_classes' */
  59   const rtti_base_array *base_classes;
  60 } rtti_object_hierarchy;
  61
  62 typedef struct _rtti_object_locator
  63 {
  64   unsigned int signature;
  65   int base_class_offset;
  66   unsigned int flags;
  67   const type_info *type_descriptor;
  68   const rtti_object_hierarchy *type_hierarchy;
  69 } rtti_object_locator;
  70
  71
  72 #ifdef __i386__  /* thiscall functions are i386-specific */
  73
  74 #define THISCALL(func) __thiscall_ ## func
  75 #define THISCALL_NAME(func) __ASM_NAME("__thiscall_" #func)
  76 #define DEFINE_THISCALL_WRAPPER(func,args) \
  77     extern void THISCALL(func)(void); \
  78     __ASM_GLOBAL_FUNC(__thiscall_ ## func, \
  79                       "popl %eax\n\t" \
  80                       "pushl %ecx\n\t" \
  81                       "pushl %eax\n\t" \
  82                       "jmp " __ASM_NAME(#func) __ASM_STDCALL(args) )
  83 #else /* __i386__ */
  84
  85 #define THISCALL(func) func
  86 #define THISCALL_NAME(func) __ASM_NAME(#func)
  87 #define DEFINE_THISCALL_WRAPPER(func,args) /* nothing */
  88
  89 #endif /* __i386__ */
  90
  91 extern const vtable_ptr MSVCRT_exception_vtable;
  92 extern const vtable_ptr MSVCRT_bad_typeid_vtable;
  93 extern const vtable_ptr MSVCRT_bad_cast_vtable;
  94 extern const vtable_ptr MSVCRT___non_rtti_object_vtable;
  95 extern const vtable_ptr MSVCRT_type_info_vtable;
  96
  97 /* get the vtable pointer for a C++ object */
  98 static inline const vtable_ptr *get_vtable( void *obj )
  99 {
 100     return *(const vtable_ptr **)obj;
 101 }
 102
 103 static inline const rtti_object_locator *get_obj_locator( void *cppobj )
 104 {
 105     const vtable_ptr *vtable = get_vtable( cppobj );
 106     return (const rtti_object_locator *)vtable[-1];
 107 }
 108
 109 static void dump_obj_locator( const rtti_object_locator *ptr )
 110 {
 111     int i;
 112     const rtti_object_hierarchy *h = ptr->type_hierarchy;
 113
 114     TRACE( "%p: sig=%08x base_offset=%08x flags=%08x type=%p %s hierarchy=%p\n",
 115            ptr, ptr->signature, ptr->base_class_offset, ptr->flags,
 116            ptr->type_descriptor, dbgstr_type_info(ptr->type_descriptor), ptr->type_hierarchy );
 117     TRACE( "  hierarchy: sig=%08x attr=%08x len=%d base classes=%p\n",
 118            h->signature, h->attributes, h->array_len, h->base_classes );
 119     for (i = 0; i < h->array_len; i++)
 120     {
 121         TRACE( "    base class %p: num %d off %d,%d,%d attr %08x type %p %s\n",
 122                h->base_classes->bases[i],
 123                h->base_classes->bases[i]->num_base_classes,
 124                h->base_classes->bases[i]->offsets.this_offset,
 125                h->base_classes->bases[i]->offsets.vbase_descr,
 126                h->base_classes->bases[i]->offsets.vbase_offset,
 127                h->base_classes->bases[i]->attributes,
 128                h->base_classes->bases[i]->type_descriptor,
 129                dbgstr_type_info(h->base_classes->bases[i]->type_descriptor) );
 130     }
 131 }
 132
 133 /* Internal common ctor for exception */
 134 static void EXCEPTION_ctor(exception *_this, const char** name)
 135 {
 136   _this->vtable = &MSVCRT_exception_vtable;
 137   if (*name)
 138   {
 139     unsigned int name_len = strlen(*name) + 1;
 140     _this->name = MSVCRT_malloc(name_len);
 141     memcpy(_this->name, *name, name_len);
 142     _this->do_free = TRUE;
 143   }
 144   else
 145   {
 146     _this->name = NULL;
 147     _this->do_free = FALSE;
 148   }
 149 }
 150
 151 /******************************************************************
 152  *              ??0exception@@QAE@ABQBD@Z (MSVCRT.@)
 153  */
 154 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_ctor,8)
 155 exception * __stdcall MSVCRT_exception_ctor(exception * _this, const char ** name)
 156 {
 157   TRACE("(%p,%s)\n", _this, *name);
 158   EXCEPTION_ctor(_this, name);
 159   return _this;
 160 }
 161
 162 /******************************************************************
 163  *              ??0exception@@QAE@ABQBDH@Z (MSVCRT.@)
 164  */
 165 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_ctor_noalloc,12)
 166 exception * __stdcall MSVCRT_exception_ctor_noalloc(exception * _this, char ** name, int noalloc)
 167 {
 168   TRACE("(%p,%s)\n", _this, *name);
 169   _this->vtable = &MSVCRT_exception_vtable;
 170   _this->name = *name;
 171   _this->do_free = FALSE;
 172   return _this;
 173 }
 174
 175 /******************************************************************
 176  *              ??0exception@@QAE@ABV0@@Z (MSVCRT.@)
 177  */
 178 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_copy_ctor,8)
 179 exception * __stdcall MSVCRT_exception_copy_ctor(exception * _this, const exception * rhs)
 180 {
 181   TRACE("(%p,%p)\n", _this, rhs);
 182
 183   if (!rhs->do_free)
 184   {
 185     _this->vtable = &MSVCRT_exception_vtable;
 186     _this->name = rhs->name;
 187     _this->do_free = FALSE;
 188   }
 189   else
 190     EXCEPTION_ctor(_this, (const char**)&rhs->name);
 191   TRACE("name = %s\n", _this->name);
 192   return _this;
 193 }
 194
 195 /******************************************************************
 196  *              ??0exception@@QAE@XZ (MSVCRT.@)
 197  */
 198 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_default_ctor,4)
 199 exception * __stdcall MSVCRT_exception_default_ctor(exception * _this)
 200 {
 201   static const char* empty = NULL;
 202
 203   TRACE("(%p)\n", _this);
 204   EXCEPTION_ctor(_this, &empty);
 205   return _this;
 206 }
 207
 208 /******************************************************************
 209  *              ??1exception@@UAE@XZ (MSVCRT.@)
 210  */
 211 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_dtor,4)
 212 void __stdcall MSVCRT_exception_dtor(exception * _this)
 213 {
 214   TRACE("(%p)\n", _this);
 215   _this->vtable = &MSVCRT_exception_vtable;
 216   if (_this->do_free) MSVCRT_free(_this->name);
 217 }
 218
 219 /******************************************************************
 220  *              ??4exception@@QAEAAV0@ABV0@@Z (MSVCRT.@)
 221  */
 222 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_opequals,8)
 223 exception * __stdcall MSVCRT_exception_opequals(exception * _this, const exception * rhs)
 224 {
 225   TRACE("(%p %p)\n", _this, rhs);
 226   if (_this != rhs)
 227   {
 228       MSVCRT_exception_dtor(_this);
 229       MSVCRT_exception_copy_ctor(_this, rhs);
 230   }
 231   TRACE("name = %s\n", _this->name);
 232   return _this;
 233 }
 234
 235 /******************************************************************
 236  *              ??_Eexception@@UAEPAXI@Z (MSVCRT.@)
 237  */
 238 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_vector_dtor,8)
 239 void * __stdcall MSVCRT_exception_vector_dtor(exception * _this, unsigned int flags)
 240 {
 241     TRACE("(%p %x)\n", _this, flags);
 242     if (flags & 2)
 243     {
 244         /* we have an array, with the number of elements stored before the first object */
 245         int i, *ptr = (int *)_this - 1;
 246
 247         for (i = *ptr - 1; i >= 0; i--) MSVCRT_exception_dtor(_this + i);
 248         MSVCRT_operator_delete(ptr);
 249     }
 250     else
 251     {
 252         MSVCRT_exception_dtor(_this);
 253         if (flags & 1) MSVCRT_operator_delete(_this);
 254     }
 255     return _this;
 256 }
 257
 258 /******************************************************************
 259  *              ??_Gexception@@UAEPAXI@Z (MSVCRT.@)
 260  */
 261 DEFINE_THISCALL_WRAPPER(MSVCRT_exception_scalar_dtor,8)
 262 void * __stdcall MSVCRT_exception_scalar_dtor(exception * _this, unsigned int flags)
 263 {
 264     TRACE("(%p %x)\n", _this, flags);
 265     MSVCRT_exception_dtor(_this);
 266     if (flags & 1) MSVCRT_operator_delete(_this);
 267     return _this;
 268 }
 269
 270 /******************************************************************
 271  *              ?what@exception@@UBEPBDXZ (MSVCRT.@)
 272  */
 273 DEFINE_THISCALL_WRAPPER(MSVCRT_what_exception,4)
 274 const char * __stdcall MSVCRT_what_exception(exception * _this)
 275 {
 276   TRACE("(%p) returning %s\n", _this, _this->name);
 277   return _this->name ? _this->name : "Unknown exception";
 278 }
 279
 280 /******************************************************************
 281  *              ??0bad_typeid@@QAE@ABV0@@Z (MSVCRT.@)
 282  */
 283 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_copy_ctor,8)
 284 bad_typeid * __stdcall MSVCRT_bad_typeid_copy_ctor(bad_typeid * _this, const bad_typeid * rhs)
 285 {
 286   TRACE("(%p %p)\n", _this, rhs);
 287   MSVCRT_exception_copy_ctor(_this, rhs);
 288   _this->vtable = &MSVCRT_bad_typeid_vtable;
 289   return _this;
 290 }
 291
 292 /******************************************************************
 293  *              ??0bad_typeid@@QAE@PBD@Z (MSVCRT.@)
 294  */
 295 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_ctor,8)
 296 bad_typeid * __stdcall MSVCRT_bad_typeid_ctor(bad_typeid * _this, const char * name)
 297 {
 298   TRACE("(%p %s)\n", _this, name);
 299   EXCEPTION_ctor(_this, &name);
 300   _this->vtable = &MSVCRT_bad_typeid_vtable;
 301   return _this;
 302 }
 303
 304 /******************************************************************
 305  *              ??_Fbad_typeid@@QAEXXZ (MSVCRT.@)
 306  */
 307 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_default_ctor,4)
 308 bad_typeid * __stdcall MSVCRT_bad_typeid_default_ctor(bad_typeid * _this)
 309 {
 310   return MSVCRT_bad_typeid_ctor( _this, "bad typeid" );
 311 }
 312
 313 /******************************************************************
 314  *              ??1bad_typeid@@UAE@XZ (MSVCRT.@)
 315  */
 316 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_dtor,4)
 317 void __stdcall MSVCRT_bad_typeid_dtor(bad_typeid * _this)
 318 {
 319   TRACE("(%p)\n", _this);
 320   MSVCRT_exception_dtor(_this);
 321 }
 322
 323 /******************************************************************
 324  *              ??4bad_typeid@@QAEAAV0@ABV0@@Z (MSVCRT.@)
 325  */
 326 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_opequals,8)
 327 bad_typeid * __stdcall MSVCRT_bad_typeid_opequals(bad_typeid * _this, const bad_typeid * rhs)
 328 {
 329   TRACE("(%p %p)\n", _this, rhs);
 330   MSVCRT_exception_opequals(_this, rhs);
 331   return _this;
 332 }
 333
 334 /******************************************************************
 335  *              ??_Ebad_typeid@@UAEPAXI@Z (MSVCRT.@)
 336  */
 337 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_vector_dtor,8)
 338 void * __stdcall MSVCRT_bad_typeid_vector_dtor(bad_typeid * _this, unsigned int flags)
 339 {
 340     TRACE("(%p %x)\n", _this, flags);
 341     if (flags & 2)
 342     {
 343         /* we have an array, with the number of elements stored before the first object */
 344         int i, *ptr = (int *)_this - 1;
 345
 346         for (i = *ptr - 1; i >= 0; i--) MSVCRT_bad_typeid_dtor(_this + i);
 347         MSVCRT_operator_delete(ptr);
 348     }
 349     else
 350     {
 351         MSVCRT_bad_typeid_dtor(_this);
 352         if (flags & 1) MSVCRT_operator_delete(_this);
 353     }
 354     return _this;
 355 }
 356
 357 /******************************************************************
 358  *              ??_Gbad_typeid@@UAEPAXI@Z (MSVCRT.@)
 359  */
 360 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_typeid_scalar_dtor,8)
 361 void * __stdcall MSVCRT_bad_typeid_scalar_dtor(bad_typeid * _this, unsigned int flags)
 362 {
 363     TRACE("(%p %x)\n", _this, flags);
 364     MSVCRT_bad_typeid_dtor(_this);
 365     if (flags & 1) MSVCRT_operator_delete(_this);
 366     return _this;
 367 }
 368
 369 /******************************************************************
 370  *              ??0__non_rtti_object@@QAE@ABV0@@Z (MSVCRT.@)
 371  */
 372 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_copy_ctor,8)
 373 __non_rtti_object * __stdcall MSVCRT___non_rtti_object_copy_ctor(__non_rtti_object * _this,
 374                                                                  const __non_rtti_object * rhs)
 375 {
 376   TRACE("(%p %p)\n", _this, rhs);
 377   MSVCRT_bad_typeid_copy_ctor(_this, rhs);
 378   _this->vtable = &MSVCRT___non_rtti_object_vtable;
 379   return _this;
 380 }
 381
 382 /******************************************************************
 383  *              ??0__non_rtti_object@@QAE@PBD@Z (MSVCRT.@)
 384  */
 385 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_ctor,8)
 386 __non_rtti_object * __stdcall MSVCRT___non_rtti_object_ctor(__non_rtti_object * _this,
 387                                                             const char * name)
 388 {
 389   TRACE("(%p %s)\n", _this, name);
 390   EXCEPTION_ctor(_this, &name);
 391   _this->vtable = &MSVCRT___non_rtti_object_vtable;
 392   return _this;
 393 }
 394
 395 /******************************************************************
 396  *              ??1__non_rtti_object@@UAE@XZ (MSVCRT.@)
 397  */
 398 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_dtor,4)
 399 void __stdcall MSVCRT___non_rtti_object_dtor(__non_rtti_object * _this)
 400 {
 401   TRACE("(%p)\n", _this);
 402   MSVCRT_bad_typeid_dtor(_this);
 403 }
 404
 405 /******************************************************************
 406  *              ??4__non_rtti_object@@QAEAAV0@ABV0@@Z (MSVCRT.@)
 407  */
 408 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_opequals,8)
 409 __non_rtti_object * __stdcall MSVCRT___non_rtti_object_opequals(__non_rtti_object * _this,
 410                                                                 const __non_rtti_object *rhs)
 411 {
 412   TRACE("(%p %p)\n", _this, rhs);
 413   MSVCRT_bad_typeid_opequals(_this, rhs);
 414   return _this;
 415 }
 416
 417 /******************************************************************
 418  *              ??_E__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
 419  */
 420 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_vector_dtor,8)
 421 void * __stdcall MSVCRT___non_rtti_object_vector_dtor(__non_rtti_object * _this, unsigned int flags)
 422 {
 423     TRACE("(%p %x)\n", _this, flags);
 424     if (flags & 2)
 425     {
 426         /* we have an array, with the number of elements stored before the first object */
 427         int i, *ptr = (int *)_this - 1;
 428
 429         for (i = *ptr - 1; i >= 0; i--) MSVCRT___non_rtti_object_dtor(_this + i);
 430         MSVCRT_operator_delete(ptr);
 431     }
 432     else
 433     {
 434         MSVCRT___non_rtti_object_dtor(_this);
 435         if (flags & 1) MSVCRT_operator_delete(_this);
 436     }
 437     return _this;
 438 }
 439
 440 /******************************************************************
 441  *              ??_G__non_rtti_object@@UAEPAXI@Z (MSVCRT.@)
 442  */
 443 DEFINE_THISCALL_WRAPPER(MSVCRT___non_rtti_object_scalar_dtor,8)
 444 void * __stdcall MSVCRT___non_rtti_object_scalar_dtor(__non_rtti_object * _this, unsigned int flags)
 445 {
 446   TRACE("(%p %x)\n", _this, flags);
 447   MSVCRT___non_rtti_object_dtor(_this);
 448   if (flags & 1) MSVCRT_operator_delete(_this);
 449   return _this;
 450 }
 451
 452 /******************************************************************
 453  *              ??0bad_cast@@AAE@PBQBD@Z (MSVCRT.@)
 454  *              ??0bad_cast@@QAE@ABQBD@Z (MSVCRT.@)
 455  */
 456 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_ctor,8)
 457 bad_cast * __stdcall MSVCRT_bad_cast_ctor(bad_cast * _this, const char ** name)
 458 {
 459   TRACE("(%p %s)\n", _this, *name);
 460   EXCEPTION_ctor(_this, name);
 461   _this->vtable = &MSVCRT_bad_cast_vtable;
 462   return _this;
 463 }
 464
 465 /******************************************************************
 466  *              ??0bad_cast@@QAE@ABV0@@Z (MSVCRT.@)
 467  */
 468 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_copy_ctor,8)
 469 bad_cast * __stdcall MSVCRT_bad_cast_copy_ctor(bad_cast * _this, const bad_cast * rhs)
 470 {
 471   TRACE("(%p %p)\n", _this, rhs);
 472   MSVCRT_exception_copy_ctor(_this, rhs);
 473   _this->vtable = &MSVCRT_bad_cast_vtable;
 474   return _this;
 475 }
 476
 477 /******************************************************************
 478  *              ??0bad_cast@@QAE@PBD@Z (MSVCRT.@)
 479  */
 480 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_ctor_charptr,8)
 481 bad_cast * __stdcall MSVCRT_bad_cast_ctor_charptr(bad_cast * _this, const char * name)
 482 {
 483   TRACE("(%p %s)\n", _this, name);
 484   EXCEPTION_ctor(_this, &name);
 485   _this->vtable = &MSVCRT_bad_cast_vtable;
 486   return _this;
 487 }
 488
 489 /******************************************************************
 490  *              ??_Fbad_cast@@QAEXXZ (MSVCRT.@)
 491  */
 492 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_default_ctor,4)
 493 bad_cast * __stdcall MSVCRT_bad_cast_default_ctor(bad_cast * _this)
 494 {
 495   return MSVCRT_bad_cast_ctor_charptr( _this, "bad cast" );
 496 }
 497
 498 /******************************************************************
 499  *              ??1bad_cast@@UAE@XZ (MSVCRT.@)
 500  */
 501 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_dtor,4)
 502 void __stdcall MSVCRT_bad_cast_dtor(bad_cast * _this)
 503 {
 504   TRACE("(%p)\n", _this);
 505   MSVCRT_exception_dtor(_this);
 506 }
 507
 508 /******************************************************************
 509  *              ??4bad_cast@@QAEAAV0@ABV0@@Z (MSVCRT.@)
 510  */
 511 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_opequals,8)
 512 bad_cast * __stdcall MSVCRT_bad_cast_opequals(bad_cast * _this, const bad_cast * rhs)
 513 {
 514   TRACE("(%p %p)\n", _this, rhs);
 515   MSVCRT_exception_opequals(_this, rhs);
 516   return _this;
 517 }
 518
 519 /******************************************************************
 520  *              ??_Ebad_cast@@UAEPAXI@Z (MSVCRT.@)
 521  */
 522 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_vector_dtor,8)
 523 void * __stdcall MSVCRT_bad_cast_vector_dtor(bad_cast * _this, unsigned int flags)
 524 {
 525     TRACE("(%p %x)\n", _this, flags);
 526     if (flags & 2)
 527     {
 528         /* we have an array, with the number of elements stored before the first object */
 529         int i, *ptr = (int *)_this - 1;
 530
 531         for (i = *ptr - 1; i >= 0; i--) MSVCRT_bad_cast_dtor(_this + i);
 532         MSVCRT_operator_delete(ptr);
 533     }
 534     else
 535     {
 536         MSVCRT_bad_cast_dtor(_this);
 537         if (flags & 1) MSVCRT_operator_delete(_this);
 538     }
 539     return _this;
 540 }
 541
 542 /******************************************************************
 543  *              ??_Gbad_cast@@UAEPAXI@Z (MSVCRT.@)
 544  */
 545 DEFINE_THISCALL_WRAPPER(MSVCRT_bad_cast_scalar_dtor,8)
 546 void * __stdcall MSVCRT_bad_cast_scalar_dtor(bad_cast * _this, unsigned int flags)
 547 {
 548   TRACE("(%p %x)\n", _this, flags);
 549   MSVCRT_bad_cast_dtor(_this);
 550   if (flags & 1) MSVCRT_operator_delete(_this);
 551   return _this;
 552 }
 553
 554 /******************************************************************
 555  *              ??8type_info@@QBEHABV0@@Z (MSVCRT.@)
 556  */
 557 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_opequals_equals,8)
 558 int __stdcall MSVCRT_type_info_opequals_equals(type_info * _this, const type_info * rhs)
 559 {
 560     int ret = !strcmp(_this->mangled + 1, rhs->mangled + 1);
 561     TRACE("(%p %p) returning %d\n", _this, rhs, ret);
 562     return ret;
 563 }
 564
 565 /******************************************************************
 566  *              ??9type_info@@QBEHABV0@@Z (MSVCRT.@)
 567  */
 568 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_opnot_equals,8)
 569 int __stdcall MSVCRT_type_info_opnot_equals(type_info * _this, const type_info * rhs)
 570 {
 571     int ret = !!strcmp(_this->mangled + 1, rhs->mangled + 1);
 572     TRACE("(%p %p) returning %d\n", _this, rhs, ret);
 573     return ret;
 574 }
 575
 576 /******************************************************************
 577  *              ?before@type_info@@QBEHABV1@@Z (MSVCRT.@)
 578  */
 579 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_before,8)
 580 int __stdcall MSVCRT_type_info_before(type_info * _this, const type_info * rhs)
 581 {
 582     int ret = strcmp(_this->mangled + 1, rhs->mangled + 1) < 0;
 583     TRACE("(%p %p) returning %d\n", _this, rhs, ret);
 584     return ret;
 585 }
 586
 587 /******************************************************************
 588  *              ??1type_info@@UAE@XZ (MSVCRT.@)
 589  */
 590 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_dtor,4)
 591 void __stdcall MSVCRT_type_info_dtor(type_info * _this)
 592 {
 593   TRACE("(%p)\n", _this);
 594   MSVCRT_free(_this->name);
 595 }
 596
 597 /******************************************************************
 598  *              ?name@type_info@@QBEPBDXZ (MSVCRT.@)
 599  */
 600 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_name,4)
 601 const char * __stdcall MSVCRT_type_info_name(type_info * _this)
 602 {
 603   if (!_this->name)
 604   {
 605     /* Create and set the demangled name */
 606     /* Nota: mangled name in type_info struct always start with a '.', while
 607      * it isn't valid for mangled name.
 608      * Is this '.' really part of the mangled name, or has it some other meaning ?
 609      */
 610     char* name = __unDName(0, _this->mangled + 1, 0,
 611                            MSVCRT_malloc, MSVCRT_free, 0x2800);
 612
 613     if (name)
 614     {
 615       unsigned int len = strlen(name);
 616
 617       /* It seems _unDName may leave blanks at the end of the demangled name */
 618       while (len && name[--len] == ' ')
 619         name[len] = '\0';
 620
 621       _mlock(_EXIT_LOCK2);
 622
 623       if (_this->name)
 624       {
 625         /* Another thread set this member since we checked above - use it */
 626         MSVCRT_free(name);
 627       }
 628       else
 629         _this->name = name;
 630
 631       _munlock(_EXIT_LOCK2);
 632     }
 633   }
 634   TRACE("(%p) returning %s\n", _this, _this->name);
 635   return _this->name;
 636 }
 637
 638 /******************************************************************
 639  *              ?raw_name@type_info@@QBEPBDXZ (MSVCRT.@)
 640  */
 641 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_raw_name,4)
 642 const char * __stdcall MSVCRT_type_info_raw_name(type_info * _this)
 643 {
 644   TRACE("(%p) returning %s\n", _this, _this->mangled);
 645   return _this->mangled;
 646 }
 647
 648 /* Unexported */
 649 DEFINE_THISCALL_WRAPPER(MSVCRT_type_info_vector_dtor,8)
 650 void * __stdcall MSVCRT_type_info_vector_dtor(type_info * _this, unsigned int flags)
 651 {
 652     TRACE("(%p %x)\n", _this, flags);
 653     if (flags & 2)
 654     {
 655         /* we have an array, with the number of elements stored before the first object */
 656         int i, *ptr = (int *)_this - 1;
 657
 658         for (i = *ptr - 1; i >= 0; i--) MSVCRT_type_info_dtor(_this + i);
 659         MSVCRT_operator_delete(ptr);
 660     }
 661     else
 662     {
 663         MSVCRT_type_info_dtor(_this);
 664         if (flags & 1) MSVCRT_operator_delete(_this);
 665     }
 666     return _this;
 667 }
 668
 669 /* vtables */
 670
 671 #ifdef _WIN64
 672
 673 #define __ASM_VTABLE(name,funcs) \
 674     __asm__(".data\n" \
 675             "\t.align 8\n" \
 676             "\t.quad " __ASM_NAME(#name "_rtti") "\n" \
 677             "\t.globl " __ASM_NAME("MSVCRT_" #name "_vtable") "\n" \
 678             __ASM_NAME("MSVCRT_" #name "_vtable") ":\n" \
 679             "\t.quad " THISCALL_NAME(MSVCRT_ ## name ## _vector_dtor) "\n" \
 680             funcs "\n\t.text");
 681
 682 #define __ASM_EXCEPTION_VTABLE(name) \
 683     __ASM_VTABLE(name, "\t.quad " THISCALL_NAME(MSVCRT_what_exception) )
 684
 685 #else
 686
 687 #define __ASM_VTABLE(name,funcs) \
 688     __asm__(".data\n" \
 689             "\t.align 4\n" \
 690             "\t.long " __ASM_NAME(#name "_rtti") "\n" \
 691             "\t.globl " __ASM_NAME("MSVCRT_" #name "_vtable") "\n" \
 692             __ASM_NAME("MSVCRT_" #name "_vtable") ":\n" \
 693             "\t.long " THISCALL_NAME(MSVCRT_ ## name ## _vector_dtor) "\n" \
 694             funcs "\n\t.text");
 695
 696 #define __ASM_EXCEPTION_VTABLE(name) \
 697     __ASM_VTABLE(name, "\t.long " THISCALL_NAME(MSVCRT_what_exception) )
 698
 699 #endif /* _WIN64 */
 700
 701 #ifndef __GNUC__
 702 void __asm_dummy_vtables(void) {
 703 #endif
 704
 705 __ASM_VTABLE(type_info,"")
 706 __ASM_EXCEPTION_VTABLE(exception)
 707 __ASM_EXCEPTION_VTABLE(bad_typeid)
 708 __ASM_EXCEPTION_VTABLE(bad_cast)
 709 __ASM_EXCEPTION_VTABLE(__non_rtti_object)
 710
 711 #ifndef __GNUC__
 712 }
 713 #endif
 714
 715 /* Static RTTI for exported objects */
 716
 717 static const type_info exception_type_info =
 718 {
 719   &MSVCRT_type_info_vtable,
 720   NULL,
 721   ".?AVexception@@"
 722 };
 723
 724 static const rtti_base_descriptor exception_rtti_base_descriptor =
 725 {
 726   &exception_type_info,
 727   0,
 728   { 0, -1, 0 },
 729   0
 730 };
 731
 732 static const rtti_base_array exception_rtti_base_array =
 733 {
 734   {
 735     &exception_rtti_base_descriptor,
 736     NULL,
 737     NULL
 738   }
 739 };
 740
 741 static const rtti_object_hierarchy exception_type_hierarchy =
 742 {
 743   0,
 744   0,
 745   1,
 746   &exception_rtti_base_array
 747 };
 748
 749 const rtti_object_locator exception_rtti =
 750 {
 751   0,
 752   0,
 753   0,
 754   &exception_type_info,
 755   &exception_type_hierarchy
 756 };
 757
 758 static const cxx_type_info exception_cxx_type_info =
 759 {
 760   0,
 761   &exception_type_info,
 762   { 0, -1, 0 },
 763   sizeof(exception),
 764   (cxx_copy_ctor)THISCALL(MSVCRT_exception_copy_ctor)
 765 };
 766
 767 static const type_info bad_typeid_type_info =
 768 {
 769   &MSVCRT_type_info_vtable,
 770   NULL,
 771   ".?AVbad_typeid@@"
 772 };
 773
 774 static const rtti_base_descriptor bad_typeid_rtti_base_descriptor =
 775 {
 776   &bad_typeid_type_info,
 777   1,
 778   { 0, -1, 0 },
 779   0
 780 };
 781
 782 static const rtti_base_array bad_typeid_rtti_base_array =
 783 {
 784   {
 785     &bad_typeid_rtti_base_descriptor,
 786     &exception_rtti_base_descriptor,
 787     NULL
 788   }
 789 };
 790
 791 static const rtti_object_hierarchy bad_typeid_type_hierarchy =
 792 {
 793   0,
 794   0,
 795   2,
 796   &bad_typeid_rtti_base_array
 797 };
 798
 799 const rtti_object_locator bad_typeid_rtti =
 800 {
 801   0,
 802   0,
 803   0,
 804   &bad_typeid_type_info,
 805   &bad_typeid_type_hierarchy
 806 };
 807
 808 static const cxx_type_info bad_typeid_cxx_type_info =
 809 {
 810   0,
 811   &bad_typeid_type_info,
 812   { 0, -1, 0 },
 813   sizeof(exception),
 814   (cxx_copy_ctor)THISCALL(MSVCRT_bad_typeid_copy_ctor)
 815 };
 816
 817 static const type_info bad_cast_type_info =
 818 {
 819   &MSVCRT_type_info_vtable,
 820   NULL,
 821   ".?AVbad_cast@@"
 822 };
 823
 824 static const rtti_base_descriptor bad_cast_rtti_base_descriptor =
 825 {
 826   &bad_cast_type_info,
 827   1,
 828   { 0, -1, 0 },
 829   0
 830 };
 831
 832 static const rtti_base_array bad_cast_rtti_base_array =
 833 {
 834   {
 835     &bad_cast_rtti_base_descriptor,
 836     &exception_rtti_base_descriptor,
 837     NULL
 838   }
 839 };
 840
 841 static const rtti_object_hierarchy bad_cast_type_hierarchy =
 842 {
 843   0,
 844   0,
 845   2,
 846   &bad_cast_rtti_base_array
 847 };
 848
 849 const rtti_object_locator bad_cast_rtti =
 850 {
 851   0,
 852   0,
 853   0,
 854   &bad_cast_type_info,
 855   &bad_cast_type_hierarchy
 856 };
 857
 858 static const cxx_type_info bad_cast_cxx_type_info =
 859 {
 860   0,
 861   &bad_cast_type_info,
 862   { 0, -1, 0 },
 863   sizeof(exception),
 864   (cxx_copy_ctor)THISCALL(MSVCRT_bad_cast_copy_ctor)
 865 };
 866
 867 static const type_info __non_rtti_object_type_info =
 868 {
 869   &MSVCRT_type_info_vtable,
 870   NULL,
 871   ".?AV__non_rtti_object@@"
 872 };
 873
 874 static const rtti_base_descriptor __non_rtti_object_rtti_base_descriptor =
 875 {
 876   &__non_rtti_object_type_info,
 877   2,
 878   { 0, -1, 0 },
 879   0
 880 };
 881
 882 static const rtti_base_array __non_rtti_object_rtti_base_array =
 883 {
 884   {
 885     &__non_rtti_object_rtti_base_descriptor,
 886     &bad_typeid_rtti_base_descriptor,
 887     &exception_rtti_base_descriptor
 888   }
 889 };
 890
 891 static const rtti_object_hierarchy __non_rtti_object_type_hierarchy =
 892 {
 893   0,
 894   0,
 895   3,
 896   &__non_rtti_object_rtti_base_array
 897 };
 898
 899 const rtti_object_locator __non_rtti_object_rtti =
 900 {
 901   0,
 902   0,
 903   0,
 904   &__non_rtti_object_type_info,
 905   &__non_rtti_object_type_hierarchy
 906 };
 907
 908 static const cxx_type_info __non_rtti_object_cxx_type_info =
 909 {
 910   0,
 911   &__non_rtti_object_type_info,
 912   { 0, -1, 0 },
 913   sizeof(exception),
 914   (cxx_copy_ctor)THISCALL(MSVCRT___non_rtti_object_copy_ctor)
 915 };
 916
 917 static const type_info type_info_type_info =
 918 {
 919   &MSVCRT_type_info_vtable,
 920   NULL,
 921   ".?AVtype_info@@"
 922 };
 923
 924 static const rtti_base_descriptor type_info_rtti_base_descriptor =
 925 {
 926   &type_info_type_info,
 927   0,
 928   { 0, -1, 0 },
 929   0
 930 };
 931
 932 static const rtti_base_array type_info_rtti_base_array =
 933 {
 934   {
 935     &type_info_rtti_base_descriptor,
 936     NULL,
 937     NULL
 938   }
 939 };
 940
 941 static const rtti_object_hierarchy type_info_type_hierarchy =
 942 {
 943   0,
 944   0,
 945   1,
 946   &type_info_rtti_base_array
 947 };
 948
 949 const rtti_object_locator type_info_rtti =
 950 {
 951   0,
 952   0,
 953   0,
 954   &type_info_type_info,
 955   &type_info_type_hierarchy
 956 };
 957
 958 /*
 959  * Exception RTTI for cpp objects
 960  */
 961 static const cxx_type_info_table bad_cast_type_info_table =
 962 {
 963   3,
 964   {
 965    &__non_rtti_object_cxx_type_info,
 966    &bad_typeid_cxx_type_info,
 967    &exception_cxx_type_info
 968   }
 969 };
 970
 971 static const cxx_exception_type bad_cast_exception_type =
 972 {
 973   0,
 974   (void*)THISCALL(MSVCRT_bad_cast_dtor),
 975   NULL,
 976   &bad_cast_type_info_table
 977 };
 978
 979 static const cxx_type_info_table bad_typeid_type_info_table =
 980 {
 981   2,
 982   {
 983    &bad_cast_cxx_type_info,
 984    &exception_cxx_type_info,
 985    NULL
 986   }
 987 };
 988
 989 static const cxx_exception_type bad_typeid_exception_type =
 990 {
 991   0,
 992   (void*)THISCALL(MSVCRT_bad_typeid_dtor),
 993   NULL,
 994   &bad_cast_type_info_table
 995 };
 996
 997 static const cxx_exception_type __non_rtti_object_exception_type =
 998 {
 999   0,
1000   (void*)THISCALL(MSVCRT___non_rtti_object_dtor),
1001   NULL,
1002   &bad_typeid_type_info_table
1003 };
1004
1005
1006 /******************************************************************
1007  *              ?set_terminate@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
1008  *
1009  * Install a handler to be called when terminate() is called.
1010  *
1011  * PARAMS
1012  *  func [I] Handler function to install
1013  *
1014  * RETURNS
1015  *  The previously installed handler function, if any.
1016  */
1017 MSVCRT_terminate_function CDECL MSVCRT_set_terminate(MSVCRT_terminate_function func)
1018 {
1019     thread_data_t *data = msvcrt_get_thread_data();
1020     MSVCRT_terminate_function previous = data->terminate_handler;
1021     TRACE("(%p) returning %p\n",func,previous);
1022     data->terminate_handler = func;
1023     return previous;
1024 }
1025
1026 /******************************************************************
1027  *              ?set_unexpected@@YAP6AXXZP6AXXZ@Z (MSVCRT.@)
1028  *
1029  * Install a handler to be called when unexpected() is called.
1030  *
1031  * PARAMS
1032  *  func [I] Handler function to install
1033  *
1034  * RETURNS
1035  *  The previously installed handler function, if any.
1036  */
1037 MSVCRT_unexpected_function CDECL MSVCRT_set_unexpected(MSVCRT_unexpected_function func)
1038 {
1039     thread_data_t *data = msvcrt_get_thread_data();
1040     MSVCRT_unexpected_function previous = data->unexpected_handler;
1041     TRACE("(%p) returning %p\n",func,previous);
1042     data->unexpected_handler = func;
1043     return previous;
1044 }
1045
1046 /******************************************************************
1047  *              ?_set_se_translator@@YAP6AXIPAU_EXCEPTION_POINTERS@@@ZP6AXI0@Z@Z  (MSVCRT.@)
1048  */
1049 MSVCRT__se_translator_function CDECL MSVCRT__set_se_translator(MSVCRT__se_translator_function func)
1050 {
1051     thread_data_t *data = msvcrt_get_thread_data();
1052     MSVCRT__se_translator_function previous = data->se_translator;
1053     TRACE("(%p) returning %p\n",func,previous);
1054     data->se_translator = func;
1055     return previous;
1056 }
1057
1058 /******************************************************************
1059  *              ?terminate@@YAXXZ (MSVCRT.@)
1060  *
1061  * Default handler for an unhandled exception.
1062  *
1063  * PARAMS
1064  *  None.
1065  *
1066  * RETURNS
1067  *  This function does not return. Either control resumes from any
1068  *  handler installed by calling set_terminate(), or (by default) abort()
1069  *  is called.
1070  */
1071 void CDECL MSVCRT_terminate(void)
1072 {
1073     thread_data_t *data = msvcrt_get_thread_data();
1074     if (data->terminate_handler) data->terminate_handler();
1075     MSVCRT_abort();
1076 }
1077
1078 /******************************************************************
1079  *              ?unexpected@@YAXXZ (MSVCRT.@)
1080  */
1081 void CDECL MSVCRT_unexpected(void)
1082 {
1083     thread_data_t *data = msvcrt_get_thread_data();
1084     if (data->unexpected_handler) data->unexpected_handler();
1085     MSVCRT_terminate();
1086 }
1087
1088
1089 /******************************************************************
1090  *              __RTtypeid (MSVCRT.@)
1091  *
1092  * Retrieve the Run Time Type Information (RTTI) for a C++ object.
1093  *
1094  * PARAMS
1095  *  cppobj [I] C++ object to get type information for.
1096  *
1097  * RETURNS
1098  *  Success: A type_info object describing cppobj.
1099  *  Failure: If the object to be cast has no RTTI, a __non_rtti_object
1100  *           exception is thrown. If cppobj is NULL, a bad_typeid exception
1101  *           is thrown. In either case, this function does not return.
1102  *
1103  * NOTES
1104  *  This function is usually called by compiler generated code as a result
1105  *  of using one of the C++ dynamic cast statements.
1106  */
1107 const type_info* CDECL MSVCRT___RTtypeid(void *cppobj)
1108 {
1109     const type_info *ret;
1110
1111     if (!cppobj)
1112     {
1113         bad_typeid e;
1114         MSVCRT_bad_typeid_ctor( &e, "Attempted a typeid of NULL pointer!" );
1115         _CxxThrowException( &e, &bad_typeid_exception_type );
1116         return NULL;
1117     }
1118
1119     __TRY
1120     {
1121         const rtti_object_locator *obj_locator = get_obj_locator( cppobj );
1122         ret = obj_locator->type_descriptor;
1123     }
1124     __EXCEPT_PAGE_FAULT
1125     {
1126         __non_rtti_object e;
1127         MSVCRT___non_rtti_object_ctor( &e, "Bad read pointer - no RTTI data!" );
1128         _CxxThrowException( &e, &bad_typeid_exception_type );
1129         return NULL;
1130     }
1131     __ENDTRY
1132     return ret;
1133 }
1134
1135 /******************************************************************
1136  *              __RTDynamicCast (MSVCRT.@)
1137  *
1138  * Dynamically cast a C++ object to one of its base classes.
1139  *
1140  * PARAMS
1141  *  cppobj   [I] Any C++ object to cast
1142  *  unknown  [I] Reserved, set to 0
1143  *  src      [I] type_info object describing cppobj
1144  *  dst      [I] type_info object describing the base class to cast to
1145  *  do_throw [I] TRUE = throw an exception if the cast fails, FALSE = don't
1146  *
1147  * RETURNS
1148  *  Success: The address of cppobj, cast to the object described by dst.
1149  *  Failure: NULL, If the object to be cast has no RTTI, or dst is not a
1150  *           valid cast for cppobj. If do_throw is TRUE, a bad_cast exception
1151  *           is thrown and this function does not return.
1152  *
1153  * NOTES
1154  *  This function is usually called by compiler generated code as a result
1155  *  of using one of the C++ dynamic cast statements.
1156  */
1157 void* CDECL MSVCRT___RTDynamicCast(void *cppobj, int unknown,
1158                                    type_info *src, type_info *dst,
1159                                    int do_throw)
1160 {
1161     void *ret;
1162
1163     if (!cppobj) return NULL;
1164
1165     TRACE("obj: %p unknown: %d src: %p %s dst: %p %s do_throw: %d)\n",
1166           cppobj, unknown, src, dbgstr_type_info(src), dst, dbgstr_type_info(dst), do_throw);
1167
1168     /* To cast an object at runtime:
1169      * 1.Find out the true type of the object from the typeinfo at vtable[-1]
1170      * 2.Search for the destination type in the class hierarchy
1171      * 3.If destination type is found, return base object address + dest offset
1172      *   Otherwise, fail the cast
1173      *
1174      * FIXME: the unknown parameter doesn't seem to be used for anything
1175      */
1176     __TRY
1177     {
1178         int i;
1179         const rtti_object_locator *obj_locator = get_obj_locator( cppobj );
1180         const rtti_object_hierarchy *obj_bases = obj_locator->type_hierarchy;
1181         const rtti_base_descriptor * const* base_desc = obj_bases->base_classes->bases;
1182
1183         if (TRACE_ON(msvcrt)) dump_obj_locator(obj_locator);
1184
1185         ret = NULL;
1186         for (i = 0; i < obj_bases->array_len; i++)
1187         {
1188             const type_info *typ = base_desc[i]->type_descriptor;
1189
1190             if (!strcmp(typ->mangled, dst->mangled))
1191             {
1192                 /* compute the correct this pointer for that base class */
1193                 void *this_ptr = (char *)cppobj - obj_locator->base_class_offset;
1194                 ret = get_this_pointer( &base_desc[i]->offsets, this_ptr );
1195                 break;
1196             }
1197         }
1198         /* VC++ sets do_throw to 1 when the result of a dynamic_cast is assigned
1199          * to a reference, since references cannot be NULL.
1200          */
1201         if (!ret && do_throw)
1202         {
1203             const char *msg = "Bad dynamic_cast!";
1204             bad_cast e;
1205             MSVCRT_bad_cast_ctor( &e, &msg );
1206             _CxxThrowException( &e, &bad_cast_exception_type );
1207         }
1208     }
1209     __EXCEPT_PAGE_FAULT
1210     {
1211         __non_rtti_object e;
1212         MSVCRT___non_rtti_object_ctor( &e, "Access violation - no RTTI data!" );
1213         _CxxThrowException( &e, &bad_typeid_exception_type );
1214         return NULL;
1215     }
1216     __ENDTRY
1217     return ret;
1218 }
1219
1220
1221 /******************************************************************
1222  *              __RTCastToVoid (MSVCRT.@)
1223  *
1224  * Dynamically cast a C++ object to a void*.
1225  *
1226  * PARAMS
1227  *  cppobj [I] The C++ object to cast
1228  *
1229  * RETURNS
1230  *  Success: The base address of the object as a void*.
1231  *  Failure: NULL, if cppobj is NULL or has no RTTI.
1232  *
1233  * NOTES
1234  *  This function is usually called by compiler generated code as a result
1235  *  of using one of the C++ dynamic cast statements.
1236  */
1237 void* CDECL MSVCRT___RTCastToVoid(void *cppobj)
1238 {
1239     void *ret;
1240
1241     if (!cppobj) return NULL;
1242
1243     __TRY
1244     {
1245         const rtti_object_locator *obj_locator = get_obj_locator( cppobj );
1246         ret = (char *)cppobj - obj_locator->base_class_offset;
1247     }
1248     __EXCEPT_PAGE_FAULT
1249     {
1250         __non_rtti_object e;
1251         MSVCRT___non_rtti_object_ctor( &e, "Access violation - no RTTI data!" );
1252         _CxxThrowException( &e, &bad_typeid_exception_type );
1253         return NULL;
1254     }
1255     __ENDTRY
1256     return ret;
1257 }