Home | History | Annotate | Line # | Download | only in libsupc++ 
      1 // Support routines for the -*- C++ -*- dynamic memory management.
      2 // Copyright (C) 1997-2024 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 extern "C" void *malloc (std::size_t);
     30 
     31 _GLIBCXX_WEAK_DEFINITION void *
     32 operator new (std::size_t sz, const std::nothrow_t&) noexcept
     33 {
     34   // _GLIBCXX_RESOLVE_LIB_DEFECTS
     35   // 206. operator new(size_t, nothrow) may become unlinked to ordinary
     36   // operator new if ordinary version replaced
     37   __try
     38     {
     39       return ::operator new(sz);
     40     }
     41   __catch (...)
     42     {
     43       // N.B. catch (...) means the process will terminate if operator new(sz)
     44       // exits with a __forced_unwind exception. The process will print
     45       // "FATAL: exception not rethrown" to stderr before exiting.
     46       //
     47       // If we propagated that exception the process would still terminate
     48       // (because this function is noexcept) but with a less informative error:
     49       // "terminate called without active exception".
     50       return nullptr;
     51     }
     52 }
     53