1 // Support routines for the -*- C++ -*- dynamic memory management. 2 // Copyright (C) 1997-2014 Free Software Foundation, Inc. 3 // 4 // This file is part of GCC. 5 // 6 // GCC is free software; you can redistribute it and/or modify 7 // it under the terms of the GNU General Public License as published by 8 // the Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 // 11 // GCC is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 // 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 #include <bits/c++config.h> 26 #include <bits/exception_defines.h> 27 #include "new" 28 29 using std::new_handler; 30 using std::bad_alloc; 31 32 extern "C" void *malloc (std::size_t); 33 34 _GLIBCXX_WEAK_DEFINITION void * operator new(std::size_t sz,const std::nothrow_t &)35operator new (std::size_t sz, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT 36 { 37 void *p; 38 39 /* malloc (0) is unpredictable; avoid it. */ 40 if (sz == 0) 41 sz = 1; 42 p = (void *) malloc (sz); 43 while (p == 0) 44 { 45 new_handler handler = std::get_new_handler (); 46 if (! handler) 47 return 0; 48 __try 49 { 50 handler (); 51 } 52 __catch(const bad_alloc&) 53 { 54 return 0; 55 } 56 57 p = (void *) malloc (sz); 58 } 59 60 return p; 61 } 62