1 // New abi Support -*- C++ -*-
3 // Copyright (C) 2000, 2001, 2003, 2004, 2009, 2011
4 // Free Software Foundation, Inc.
6 // This file is part of GCC.
8 // GCC is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3, or (at your option)
13 // GCC is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // Under Section 7 of GPL version 3, you are granted additional
19 // permissions described in the GCC Runtime Library Exception, version
20 // 3.1, as published by the Free Software Foundation.
22 // You should have received a copy of the GNU General Public License and
23 // a copy of the GCC Runtime Library Exception along with this program;
24 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 // <http://www.gnu.org/licenses/>.
27 // Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com>
32 #include <bits/exception_defines.h>
33 #include "unwind-cxx.h"
39 struct uncatch_exception
42 ~uncatch_exception () { __cxa_begin_catch (&p->unwindHeader); }
48 operator=(const uncatch_exception&);
50 uncatch_exception(const uncatch_exception&);
53 uncatch_exception::uncatch_exception() : p(0)
55 __cxa_eh_globals *globals = __cxa_get_globals_fast ();
57 p = globals->caughtExceptions;
59 globals->caughtExceptions = p->nextException;
60 globals->uncaughtExceptions += 1;
64 // Allocate and construct array.
66 __cxa_vec_new(std::size_t element_count,
67 std::size_t element_size,
68 std::size_t padding_size,
69 __cxa_cdtor_type constructor,
70 __cxa_cdtor_type destructor)
72 return __cxa_vec_new2(element_count, element_size, padding_size,
73 constructor, destructor,
74 &operator new[], &operator delete []);
78 __cxa_vec_new2(std::size_t element_count,
79 std::size_t element_size,
80 std::size_t padding_size,
81 __cxa_cdtor_type constructor,
82 __cxa_cdtor_type destructor,
83 void *(*alloc) (std::size_t),
84 void (*dealloc) (void *))
86 std::size_t size = element_count * element_size + padding_size;
87 char *base = static_cast <char *> (alloc (size));
94 reinterpret_cast <std::size_t *> (base)[-1] = element_count;
95 #ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
96 reinterpret_cast <std::size_t *> (base)[-2] = element_size;
101 __cxa_vec_ctor(base, element_count, element_size,
102 constructor, destructor);
107 uncatch_exception ue;
108 // Core issue 901 will probably be resolved such that a
109 // deleted operator delete means not freeing memory here.
111 dealloc(base - padding_size);
113 __throw_exception_again;
119 __cxa_vec_new3(std::size_t element_count,
120 std::size_t element_size,
121 std::size_t padding_size,
122 __cxa_cdtor_type constructor,
123 __cxa_cdtor_type destructor,
124 void *(*alloc) (std::size_t),
125 void (*dealloc) (void *, std::size_t))
127 std::size_t size = element_count * element_size + padding_size;
128 char *base = static_cast<char *>(alloc (size));
134 base += padding_size;
135 reinterpret_cast<std::size_t *>(base)[-1] = element_count;
136 #ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
137 reinterpret_cast <std::size_t *> (base)[-2] = element_size;
142 __cxa_vec_ctor(base, element_count, element_size,
143 constructor, destructor);
148 uncatch_exception ue;
150 dealloc(base - padding_size, size);
152 __throw_exception_again;
158 extern "C" __cxa_vec_ctor_return_type
159 __cxa_vec_ctor(void *array_address,
160 std::size_t element_count,
161 std::size_t element_size,
162 __cxa_cdtor_type constructor,
163 __cxa_cdtor_type destructor)
166 char *ptr = static_cast<char *>(array_address);
171 for (; ix != element_count; ix++, ptr += element_size)
177 uncatch_exception ue;
178 __cxa_vec_cleanup(array_address, ix, element_size, destructor);
180 __throw_exception_again;
182 _GLIBCXX_CXA_VEC_CTOR_RETURN (array_address);
185 // Construct an array by copying.
186 extern "C" __cxa_vec_ctor_return_type
187 __cxa_vec_cctor(void *dest_array,
189 std::size_t element_count,
190 std::size_t element_size,
191 __cxa_cdtor_return_type (*constructor) (void *, void *),
192 __cxa_cdtor_type destructor)
195 char *dest_ptr = static_cast<char *>(dest_array);
196 char *src_ptr = static_cast<char *>(src_array);
201 for (; ix != element_count;
202 ix++, src_ptr += element_size, dest_ptr += element_size)
203 constructor(dest_ptr, src_ptr);
208 uncatch_exception ue;
209 __cxa_vec_cleanup(dest_array, ix, element_size, destructor);
211 __throw_exception_again;
213 _GLIBCXX_CXA_VEC_CTOR_RETURN (dest_array);
218 __cxa_vec_dtor(void *array_address,
219 std::size_t element_count,
220 std::size_t element_size,
221 __cxa_cdtor_type destructor)
225 char *ptr = static_cast<char *>(array_address);
226 std::size_t ix = element_count;
228 ptr += element_count * element_size;
241 uncatch_exception ue;
242 __cxa_vec_cleanup(array_address, ix, element_size, destructor);
244 __throw_exception_again;
249 // Destruct array as a result of throwing an exception.
250 // [except.ctor]/3 If a destructor called during stack unwinding
251 // exits with an exception, terminate is called.
253 __cxa_vec_cleanup(void *array_address,
254 std::size_t element_count,
255 std::size_t element_size,
256 __cxa_cdtor_type destructor) throw()
260 char *ptr = static_cast <char *> (array_address);
261 std::size_t ix = element_count;
263 ptr += element_count * element_size;
280 // Destruct and release array.
282 __cxa_vec_delete(void *array_address,
283 std::size_t element_size,
284 std::size_t padding_size,
285 __cxa_cdtor_type destructor)
287 __cxa_vec_delete2(array_address, element_size, padding_size,
289 &operator delete []);
293 __cxa_vec_delete2(void *array_address,
294 std::size_t element_size,
295 std::size_t padding_size,
296 __cxa_cdtor_type destructor,
297 void (*dealloc) (void *))
302 char* base = static_cast<char *>(array_address);
306 std::size_t element_count = reinterpret_cast<std::size_t *>(base)[-1];
307 base -= padding_size;
310 __cxa_vec_dtor(array_address, element_count, element_size,
316 uncatch_exception ue;
319 __throw_exception_again;
326 __cxa_vec_delete3(void *array_address,
327 std::size_t element_size,
328 std::size_t padding_size,
329 __cxa_cdtor_type destructor,
330 void (*dealloc) (void *, std::size_t))
335 char* base = static_cast <char *> (array_address);
336 std::size_t size = 0;
340 std::size_t element_count = reinterpret_cast<std::size_t *> (base)[-1];
341 base -= padding_size;
342 size = element_count * element_size + padding_size;
345 __cxa_vec_dtor(array_address, element_count, element_size,
351 uncatch_exception ue;
354 __throw_exception_again;
359 } // namespace __cxxabiv1
361 #if defined(__arm__) && defined(__ARM_EABI__)
363 // The ARM C++ ABI requires that the library provide these additional
364 // helper functions. There are placed in this file, despite being
365 // architecture-specifier, so that the compiler can inline the __cxa
366 // functions into these functions as appropriate.
371 __aeabi_vec_ctor_nocookie_nodtor (void *array_address,
372 abi::__cxa_cdtor_type constructor,
373 std::size_t element_size,
374 std::size_t element_count)
376 return abi::__cxa_vec_ctor (array_address, element_count, element_size,
377 constructor, /*destructor=*/NULL);
381 __aeabi_vec_ctor_cookie_nodtor (void *array_address,
382 abi::__cxa_cdtor_type constructor,
383 std::size_t element_size,
384 std::size_t element_count)
386 if (array_address == NULL)
389 array_address = reinterpret_cast<std::size_t *>(array_address) + 2;
390 reinterpret_cast<std::size_t *>(array_address)[-2] = element_size;
391 reinterpret_cast<std::size_t *>(array_address)[-1] = element_count;
392 return abi::__cxa_vec_ctor (array_address,
393 element_count, element_size,
394 constructor, /*destructor=*/NULL);
398 __aeabi_vec_cctor_nocookie_nodtor (void *dest_array,
400 std::size_t element_size,
401 std::size_t element_count,
402 void *(*constructor) (void *, void *))
404 return abi::__cxa_vec_cctor (dest_array, src_array,
405 element_count, element_size,
410 __aeabi_vec_new_cookie_noctor (std::size_t element_size,
411 std::size_t element_count)
413 return abi::__cxa_vec_new(element_count, element_size,
414 2 * sizeof (std::size_t),
415 /*constructor=*/NULL, /*destructor=*/NULL);
419 __aeabi_vec_new_nocookie (std::size_t element_size,
420 std::size_t element_count,
421 abi::__cxa_cdtor_type constructor)
423 return abi::__cxa_vec_new (element_count, element_size, 0, constructor,
428 __aeabi_vec_new_cookie_nodtor (std::size_t element_size,
429 std::size_t element_count,
430 abi::__cxa_cdtor_type constructor)
432 return abi::__cxa_vec_new(element_count, element_size,
433 2 * sizeof (std::size_t),
438 __aeabi_vec_new_cookie(std::size_t element_size,
439 std::size_t element_count,
440 abi::__cxa_cdtor_type constructor,
441 abi::__cxa_cdtor_type destructor)
443 return abi::__cxa_vec_new (element_count, element_size,
444 2 * sizeof (std::size_t),
445 constructor, destructor);
450 __aeabi_vec_dtor (void *array_address,
451 abi::__cxa_cdtor_type destructor,
452 std::size_t element_size,
453 std::size_t element_count)
455 abi::__cxa_vec_dtor (array_address, element_count, element_size,
457 return reinterpret_cast<std::size_t*> (array_address) - 2;
461 __aeabi_vec_dtor_cookie (void *array_address,
462 abi::__cxa_cdtor_type destructor)
467 abi::__cxa_vec_dtor (array_address,
468 reinterpret_cast<std::size_t *>(array_address)[-1],
469 reinterpret_cast<std::size_t *>(array_address)[-2],
471 return reinterpret_cast<std::size_t*> (array_address) - 2;
476 __aeabi_vec_delete (void *array_address,
477 abi::__cxa_cdtor_type destructor)
482 abi::__cxa_vec_delete (array_address,
483 reinterpret_cast<std::size_t *>(array_address)[-2],
484 2 * sizeof (std::size_t),
489 __aeabi_vec_delete3 (void *array_address,
490 abi::__cxa_cdtor_type destructor,
491 void (*dealloc) (void *, std::size_t))
496 abi::__cxa_vec_delete3 (array_address,
497 reinterpret_cast<std::size_t *>(array_address)[-2],
498 2 * sizeof (std::size_t),
499 destructor, dealloc);
503 __aeabi_vec_delete3_nodtor (void *array_address,
504 void (*dealloc) (void *, std::size_t))
509 abi::__cxa_vec_delete3 (array_address,
510 reinterpret_cast<std::size_t *>(array_address)[-2],
511 2 * sizeof (std::size_t),
512 /*destructor=*/NULL, dealloc);
514 } // namespace __aeabiv1
516 #endif // defined(__arm__) && defined(__ARM_EABI__)