1 /* Replace operator new/new[], for GDB, the GNU debugger.
3 Copyright (C) 2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "common-defs.h"
21 #include "host-defs.h"
24 /* Override operator new / operator new[], in order to internal_error
25 on allocation failure and thus query the user for abort/core
26 dump/continue, just like xmalloc does. We don't do this from a
27 new-handler function instead (std::set_new_handler) because we want
28 to catch allocation errors from within global constructors too.
30 Note that C++ implementations could either have their throw
31 versions call the nothrow versions (libstdc++), or the other way
32 around (clang/libc++). For that reason, we replace both throw and
33 nothrow variants and call malloc directly. */
36 operator new (std::size_t sz
)
38 /* malloc (0) is unpredictable; avoid it. */
42 void *p
= malloc (sz
); /* ARI: malloc */
45 /* If the user decides to continue debugging, throw a
46 gdb_quit_bad_alloc exception instead of a regular QUIT
47 gdb_exception. The former extends both std::bad_alloc and a
48 QUIT gdb_exception. This is necessary because operator new
49 can only ever throw std::bad_alloc, or something that extends
55 CATCH (ex
, RETURN_MASK_ALL
)
57 do_cleanups (all_cleanups ());
59 throw gdb_quit_bad_alloc (ex
);
67 operator new (std::size_t sz
, const std::nothrow_t
&)
69 /* malloc (0) is unpredictable; avoid it. */
72 return malloc (sz
); /* ARI: malloc */
76 operator new[] (std::size_t sz
)
78 return ::operator new (sz
);
82 operator new[] (std::size_t sz
, const std::nothrow_t
&)
84 return ::operator new (sz
, std::nothrow
);
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