URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libitm/] [eh_cpp.cc] - Rev 792
Go to most recent revision | Compare with Previous | Blame | View Log
/* Copyright (C) 2009, 2011, 2012 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@redhat.com>. This file is part of the GNU Transactional Memory Library (libitm). Libitm is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Libitm is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #include "libitm_i.h" using namespace GTM; /* Everything from libstdc++ is weak, to avoid requiring that library to be linked into plain C applications using libitm.so. */ #define WEAK __attribute__((weak)) extern "C" { extern void *__cxa_allocate_exception (size_t) WEAK; extern void __cxa_throw (void *, void *, void *) WEAK; extern void *__cxa_begin_catch (void *) WEAK; extern void *__cxa_end_catch (void) WEAK; extern void __cxa_tm_cleanup (void *, void *, unsigned int) WEAK; #if !defined (HAVE_ELF_STYLE_WEAKREF) && !defined (__MACH__) void *__cxa_allocate_exception (size_t) { return NULL; } void __cxa_throw (void *, void *, void *) { return; } void *__cxa_begin_catch (void *) { return NULL; } void *__cxa_end_catch (void) { return NULL; } void __cxa_tm_cleanup (void *, void *, unsigned int) { return; } void _Unwind_DeleteException (_Unwind_Exception *) { return; } #endif /* HAVE_ELF_STYLE_WEAKREF */ } void * _ITM_cxa_allocate_exception (size_t size) { void *r = __cxa_allocate_exception (size); gtm_thr()->cxa_unthrown = r; return r; } void _ITM_cxa_throw (void *obj, void *tinfo, void *dest) { gtm_thr()->cxa_unthrown = NULL; __cxa_throw (obj, tinfo, dest); } void * _ITM_cxa_begin_catch (void *exc_ptr) { gtm_thr()->cxa_catch_count++; return __cxa_begin_catch (exc_ptr); } void _ITM_cxa_end_catch (void) { gtm_thr()->cxa_catch_count--; __cxa_end_catch (); } void GTM::gtm_thread::revert_cpp_exceptions (gtm_transaction_cp *cp) { if (cp) { // If rolling back a nested transaction, only clean up unthrown // exceptions since the last checkpoint. Always reset eh_in_flight // because it just contains the argument provided to // _ITM_commitTransactionEH void *unthrown = (cxa_unthrown != cp->cxa_unthrown ? cxa_unthrown : NULL); assert (cxa_catch_count >= cp->cxa_catch_count); uint32_t catch_count = cxa_catch_count - cp->cxa_catch_count; if (unthrown || catch_count) { __cxa_tm_cleanup (unthrown, this->eh_in_flight, catch_count); cxa_catch_count = cp->cxa_catch_count; cxa_unthrown = cp->cxa_unthrown; this->eh_in_flight = NULL; } } else { // Both cxa_catch_count and cxa_unthrown are maximal because EH regions // and transactions are properly nested. if (this->cxa_unthrown || this->cxa_catch_count) { __cxa_tm_cleanup (this->cxa_unthrown, this->eh_in_flight, this->cxa_catch_count); this->cxa_catch_count = 0; this->cxa_unthrown = NULL; this->eh_in_flight = NULL; } } }
Go to most recent revision | Compare with Previous | Blame | View Log