1*38fd1498Szrj // Support routines for the -*- C++ -*- dynamic memory management. 2*38fd1498Szrj 3*38fd1498Szrj // Copyright (C) 1997-2018 Free Software Foundation, Inc. 4*38fd1498Szrj // 5*38fd1498Szrj // This file is part of GCC. 6*38fd1498Szrj // 7*38fd1498Szrj // GCC is free software; you can redistribute it and/or modify 8*38fd1498Szrj // it under the terms of the GNU General Public License as published by 9*38fd1498Szrj // the Free Software Foundation; either version 3, or (at your option) 10*38fd1498Szrj // any later version. 11*38fd1498Szrj // 12*38fd1498Szrj // GCC is distributed in the hope that it will be useful, 13*38fd1498Szrj // but WITHOUT ANY WARRANTY; without even the implied warranty of 14*38fd1498Szrj // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15*38fd1498Szrj // GNU General Public License for more details. 16*38fd1498Szrj // 17*38fd1498Szrj // Under Section 7 of GPL version 3, you are granted additional 18*38fd1498Szrj // permissions described in the GCC Runtime Library Exception, version 19*38fd1498Szrj // 3.1, as published by the Free Software Foundation. 20*38fd1498Szrj 21*38fd1498Szrj // You should have received a copy of the GNU General Public License and 22*38fd1498Szrj // a copy of the GCC Runtime Library Exception along with this program; 23*38fd1498Szrj // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24*38fd1498Szrj // <http://www.gnu.org/licenses/>. 25*38fd1498Szrj 26*38fd1498Szrj #include <bits/c++config.h> 27*38fd1498Szrj #include <cstdlib> 28*38fd1498Szrj #include <bits/exception_defines.h> 29*38fd1498Szrj #include "new" 30*38fd1498Szrj 31*38fd1498Szrj using std::new_handler; 32*38fd1498Szrj using std::bad_alloc; 33*38fd1498Szrj #if _GLIBCXX_HOSTED 34*38fd1498Szrj using std::malloc; 35*38fd1498Szrj #else 36*38fd1498Szrj // A freestanding C runtime may not provide "malloc" -- but there is no 37*38fd1498Szrj // other reasonable way to implement "operator new". 38*38fd1498Szrj extern "C" void *malloc (std::size_t); 39*38fd1498Szrj #endif 40*38fd1498Szrj 41*38fd1498Szrj _GLIBCXX_WEAK_DEFINITION void * operator new(std::size_t sz)42*38fd1498Szrjoperator new (std::size_t sz) _GLIBCXX_THROW (std::bad_alloc) 43*38fd1498Szrj { 44*38fd1498Szrj void *p; 45*38fd1498Szrj 46*38fd1498Szrj /* malloc (0) is unpredictable; avoid it. */ 47*38fd1498Szrj if (sz == 0) 48*38fd1498Szrj sz = 1; 49*38fd1498Szrj 50*38fd1498Szrj while (__builtin_expect ((p = malloc (sz)) == 0, false)) 51*38fd1498Szrj { 52*38fd1498Szrj new_handler handler = std::get_new_handler (); 53*38fd1498Szrj if (! handler) 54*38fd1498Szrj _GLIBCXX_THROW_OR_ABORT(bad_alloc()); 55*38fd1498Szrj handler (); 56*38fd1498Szrj } 57*38fd1498Szrj 58*38fd1498Szrj return p; 59*38fd1498Szrj } 60