// Support routines for the -*- C++ -*- dynamic memory management.
-// Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation
+// Copyright (C) 1997-2024 Free Software Foundation, Inc.
//
// This file is part of GCC.
//
// GCC 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 2, or (at your option)
+// the Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// GCC is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
-// You should have received a copy of the GNU General Public License
-// along with GCC; see the file COPYING. If not, write to
-// the Free Software Foundation, 59 Temple Place - Suite 330,
-// Boston, MA 02111-1307, USA.
-//
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// 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.
-#include "new"
-#include <exception_defines.h>
+// 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/>.
-using std::new_handler;
-using std::bad_alloc;
+#include <bits/c++config.h>
+#include <bits/exception_defines.h>
+#include "new"
extern "C" void *malloc (std::size_t);
-extern new_handler __new_handler;
-__attribute__((weak)) void *
-operator new (std::size_t sz, const std::nothrow_t&) throw()
+_GLIBCXX_WEAK_DEFINITION void *
+operator new (std::size_t sz, const std::nothrow_t&) noexcept
{
- void *p;
-
- /* malloc (0) is unpredictable; avoid it. */
- if (sz == 0)
- sz = 1;
- p = (void *) malloc (sz);
- while (p == 0)
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 206. operator new(size_t, nothrow) may become unlinked to ordinary
+ // operator new if ordinary version replaced
+ __try
{
- new_handler handler = __new_handler;
- if (! handler)
- return 0;
- try
- {
- handler ();
- }
- catch (bad_alloc &)
- {
- return 0;
- }
-
- p = (void *) malloc (sz);
+ return ::operator new(sz);
+ }
+ __catch (...)
+ {
+ // N.B. catch (...) means the process will terminate if operator new(sz)
+ // exits with a __forced_unwind exception. The process will print
+ // "FATAL: exception not rethrown" to stderr before exiting.
+ //
+ // If we propagated that exception the process would still terminate
+ // (because this function is noexcept) but with a less informative error:
+ // "terminate called without active exception".
+ return nullptr;
}
-
- return p;
}