1 // New abi Support -*- C++ -*-
3 // Copyright (C) 2000, 2001, 2003, 2004, 2009 Free Software Foundation, Inc.
5 // This file is part of GCC.
7 // GCC is free software; you can redistribute it and/or modify
8 // it under the terms of the GNU General Public License as published by
9 // the Free Software Foundation; either version 3, or (at your option)
12 // GCC 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
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
26 // Written by Nathan Sidwell, Codesourcery LLC, <nathan@codesourcery.com>
31 #include <exception_defines.h>
32 #include "unwind-cxx.h"
38 struct uncatch_exception
41 ~uncatch_exception () { __cxa_begin_catch (&p->unwindHeader); }
47 operator=(const uncatch_exception&);
49 uncatch_exception(const uncatch_exception&);
52 uncatch_exception::uncatch_exception() : p(0)
54 __cxa_eh_globals *globals = __cxa_get_globals_fast ();
56 p = globals->caughtExceptions;
58 globals->caughtExceptions = p->nextException;
59 globals->uncaughtExceptions += 1;
63 // Allocate and construct array.
65 __cxa_vec_new(std::size_t element_count,
66 std::size_t element_size,
67 std::size_t padding_size,
68 __cxa_cdtor_type constructor,
69 __cxa_cdtor_type destructor)
71 return __cxa_vec_new2(element_count, element_size, padding_size,
72 constructor, destructor,
73 &operator new[], &operator delete []);
77 __cxa_vec_new2(std::size_t element_count,
78 std::size_t element_size,
79 std::size_t padding_size,
80 __cxa_cdtor_type constructor,
81 __cxa_cdtor_type destructor,
82 void *(*alloc) (std::size_t),
83 void (*dealloc) (void *))
85 std::size_t size = element_count * element_size + padding_size;
86 char *base = static_cast <char *> (alloc (size));
93 reinterpret_cast <std::size_t *> (base)[-1] = element_count;
94 #ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
95 reinterpret_cast <std::size_t *> (base)[-2] = element_size;
100 __cxa_vec_ctor(base, element_count, element_size,
101 constructor, destructor);
106 uncatch_exception ue;
107 dealloc(base - padding_size);
109 __throw_exception_again;
115 __cxa_vec_new3(std::size_t element_count,
116 std::size_t element_size,
117 std::size_t padding_size,
118 __cxa_cdtor_type constructor,
119 __cxa_cdtor_type destructor,
120 void *(*alloc) (std::size_t),
121 void (*dealloc) (void *, std::size_t))
123 std::size_t size = element_count * element_size + padding_size;
124 char *base = static_cast<char *>(alloc (size));
130 base += padding_size;
131 reinterpret_cast<std::size_t *>(base)[-1] = element_count;
132 #ifdef _GLIBCXX_ELTSIZE_IN_COOKIE
133 reinterpret_cast <std::size_t *> (base)[-2] = element_size;
138 __cxa_vec_ctor(base, element_count, element_size,
139 constructor, destructor);
144 uncatch_exception ue;
145 dealloc(base - padding_size, size);
147 __throw_exception_again;
153 extern "C" __cxa_vec_ctor_return_type
154 __cxa_vec_ctor(void *array_address,
155 std::size_t element_count,
156 std::size_t element_size,
157 __cxa_cdtor_type constructor,
158 __cxa_cdtor_type destructor)
161 char *ptr = static_cast<char *>(array_address);
166 for (; ix != element_count; ix++, ptr += element_size)
172 uncatch_exception ue;
173 __cxa_vec_cleanup(array_address, ix, element_size, destructor);
175 __throw_exception_again;
177 _GLIBCXX_CXA_VEC_CTOR_RETURN (array_address);
180 // Construct an array by copying.
181 extern "C" __cxa_vec_ctor_return_type
182 __cxa_vec_cctor(void *dest_array,
184 std::size_t element_count,
185 std::size_t element_size,
186 __cxa_cdtor_return_type (*constructor) (void *, void *),
187 __cxa_cdtor_type destructor)
190 char *dest_ptr = static_cast<char *>(dest_array);
191 char *src_ptr = static_cast<char *>(src_array);
196 for (; ix != element_count;
197 ix++, src_ptr += element_size, dest_ptr += element_size)
198 constructor(dest_ptr, src_ptr);
203 uncatch_exception ue;
204 __cxa_vec_cleanup(dest_array, ix, element_size, destructor);
206 __throw_exception_again;
208 _GLIBCXX_CXA_VEC_CTOR_RETURN (dest_array);
213 __cxa_vec_dtor(void *array_address,
214 std::size_t element_count,
215 std::size_t element_size,
216 __cxa_cdtor_type destructor)
220 char *ptr = static_cast<char *>(array_address);
221 std::size_t ix = element_count;
223 ptr += element_count * element_size;
236 uncatch_exception ue;
237 __cxa_vec_cleanup(array_address, ix, element_size, destructor);
239 __throw_exception_again;
244 // Destruct array as a result of throwing an exception.
245 // [except.ctor]/3 If a destructor called during stack unwinding
246 // exits with an exception, terminate is called.
248 __cxa_vec_cleanup(void *array_address,
249 std::size_t element_count,
250 std::size_t element_size,
251 __cxa_cdtor_type destructor)
255 char *ptr = static_cast <char *> (array_address);
256 std::size_t ix = element_count;
258 ptr += element_count * element_size;
275 // Destruct and release array.
277 __cxa_vec_delete(void *array_address,
278 std::size_t element_size,
279 std::size_t padding_size,
280 __cxa_cdtor_type destructor)
282 __cxa_vec_delete2(array_address, element_size, padding_size,
284 &operator delete []);
288 __cxa_vec_delete2(void *array_address,
289 std::size_t element_size,
290 std::size_t padding_size,
291 __cxa_cdtor_type destructor,
292 void (*dealloc) (void *))
297 char* base = static_cast<char *>(array_address);
301 std::size_t element_count = reinterpret_cast<std::size_t *>(base)[-1];
302 base -= padding_size;
305 __cxa_vec_dtor(array_address, element_count, element_size,
311 uncatch_exception ue;
314 __throw_exception_again;
321 __cxa_vec_delete3(void *array_address,
322 std::size_t element_size,
323 std::size_t padding_size,
324 __cxa_cdtor_type destructor,
325 void (*dealloc) (void *, std::size_t))
330 char* base = static_cast <char *> (array_address);
331 std::size_t size = 0;
335 std::size_t element_count = reinterpret_cast<std::size_t *> (base)[-1];
336 base -= padding_size;
337 size = element_count * element_size + padding_size;
340 __cxa_vec_dtor(array_address, element_count, element_size,
346 uncatch_exception ue;
349 __throw_exception_again;
354 } // namespace __cxxabiv1
356 #if defined(__arm__) && defined(__ARM_EABI__)
358 // The ARM C++ ABI requires that the library provide these additional
359 // helper functions. There are placed in this file, despite being
360 // architecture-specifier, so that the compiler can inline the __cxa
361 // functions into these functions as appropriate.
366 __aeabi_vec_ctor_nocookie_nodtor (void *array_address,
367 abi::__cxa_cdtor_type constructor,
368 std::size_t element_size,
369 std::size_t element_count)
371 return abi::__cxa_vec_ctor (array_address, element_count, element_size,
372 constructor, /*destructor=*/NULL);
376 __aeabi_vec_ctor_cookie_nodtor (void *array_address,
377 abi::__cxa_cdtor_type constructor,
378 std::size_t element_size,
379 std::size_t element_count)
381 if (array_address == NULL)
384 array_address = reinterpret_cast<std::size_t *>(array_address) + 2;
385 reinterpret_cast<std::size_t *>(array_address)[-2] = element_size;
386 reinterpret_cast<std::size_t *>(array_address)[-1] = element_count;
387 return abi::__cxa_vec_ctor (array_address,
388 element_count, element_size,
389 constructor, /*destructor=*/NULL);
393 __aeabi_vec_cctor_nocookie_nodtor (void *dest_array,
395 std::size_t element_size,
396 std::size_t element_count,
397 void *(*constructor) (void *, void *))
399 return abi::__cxa_vec_cctor (dest_array, src_array,
400 element_count, element_size,
405 __aeabi_vec_new_cookie_noctor (std::size_t element_size,
406 std::size_t element_count)
408 return abi::__cxa_vec_new(element_count, element_size,
409 2 * sizeof (std::size_t),
410 /*constructor=*/NULL, /*destructor=*/NULL);
414 __aeabi_vec_new_nocookie (std::size_t element_size,
415 std::size_t element_count,
416 abi::__cxa_cdtor_type constructor)
418 return abi::__cxa_vec_new (element_count, element_size, 0, constructor,
423 __aeabi_vec_new_cookie_nodtor (std::size_t element_size,
424 std::size_t element_count,
425 abi::__cxa_cdtor_type constructor)
427 return abi::__cxa_vec_new(element_count, element_size,
428 2 * sizeof (std::size_t),
433 __aeabi_vec_new_cookie(std::size_t element_size,
434 std::size_t element_count,
435 abi::__cxa_cdtor_type constructor,
436 abi::__cxa_cdtor_type destructor)
438 return abi::__cxa_vec_new (element_count, element_size,
439 2 * sizeof (std::size_t),
440 constructor, destructor);
445 __aeabi_vec_dtor (void *array_address,
446 abi::__cxa_cdtor_type destructor,
447 std::size_t element_size,
448 std::size_t element_count)
450 abi::__cxa_vec_dtor (array_address, element_count, element_size,
452 return reinterpret_cast<std::size_t*> (array_address) - 2;
456 __aeabi_vec_dtor_cookie (void *array_address,
457 abi::__cxa_cdtor_type destructor)
462 abi::__cxa_vec_dtor (array_address,
463 reinterpret_cast<std::size_t *>(array_address)[-1],
464 reinterpret_cast<std::size_t *>(array_address)[-2],
466 return reinterpret_cast<std::size_t*> (array_address) - 2;
471 __aeabi_vec_delete (void *array_address,
472 abi::__cxa_cdtor_type destructor)
477 abi::__cxa_vec_delete (array_address,
478 reinterpret_cast<std::size_t *>(array_address)[-2],
479 2 * sizeof (std::size_t),
484 __aeabi_vec_delete3 (void *array_address,
485 abi::__cxa_cdtor_type destructor,
486 void (*dealloc) (void *, std::size_t))
491 abi::__cxa_vec_delete3 (array_address,
492 reinterpret_cast<std::size_t *>(array_address)[-2],
493 2 * sizeof (std::size_t),
494 destructor, dealloc);
498 __aeabi_vec_delete3_nodtor (void *array_address,
499 void (*dealloc) (void *, std::size_t))
504 abi::__cxa_vec_delete3 (array_address,
505 reinterpret_cast<std::size_t *>(array_address)[-2],
506 2 * sizeof (std::size_t),
507 /*destructor=*/NULL, dealloc);
509 } // namespace __aeabiv1
511 #endif // defined(__arm__) && defined(__ARM_EABI__)