| /* Replace operator new/new[], for GDB, the GNU debugger. |
| |
| Copyright (C) 2016-2021 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program 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 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 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 this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| /* GCC does not understand __has_feature. */ |
| #if !defined(__has_feature) |
| # define __has_feature(x) 0 |
| #endif |
| |
| #if !__has_feature(address_sanitizer) && !defined(__SANITIZE_ADDRESS__) |
| #include "common-defs.h" |
| #include "host-defs.h" |
| #include <new> |
| |
| /* Override operator new / operator new[], in order to internal_error |
| on allocation failure and thus query the user for abort/core |
| dump/continue, just like xmalloc does. We don't do this from a |
| new-handler function instead (std::set_new_handler) because we want |
| to catch allocation errors from within global constructors too. |
| |
| Skip overriding if building with -fsanitize=address though. |
| Address sanitizer wants to override operator new/delete too in |
| order to detect malloc+delete and new+free mismatches. Our |
| versions would mask out ASan's, with the result of losing that |
| useful mismatch detection. |
| |
| Note that C++ implementations could either have their throw |
| versions call the nothrow versions (libstdc++), or the other way |
| around (clang/libc++). For that reason, we replace both throw and |
| nothrow variants and call malloc directly. */ |
| |
| void * |
| operator new (std::size_t sz) |
| { |
| /* malloc (0) is unpredictable; avoid it. */ |
| if (sz == 0) |
| sz = 1; |
| |
| void *p = malloc (sz); /* ARI: malloc */ |
| if (p == NULL) |
| { |
| /* If the user decides to continue debugging, throw a |
| gdb_quit_bad_alloc exception instead of a regular QUIT |
| gdb_exception. The former extends both std::bad_alloc and a |
| QUIT gdb_exception. This is necessary because operator new |
| can only ever throw std::bad_alloc, or something that extends |
| it. */ |
| try |
| { |
| malloc_failure (sz); |
| } |
| catch (gdb_exception &ex) |
| { |
| throw gdb_quit_bad_alloc (std::move (ex)); |
| } |
| } |
| return p; |
| } |
| |
| void * |
| operator new (std::size_t sz, const std::nothrow_t&) noexcept |
| { |
| /* malloc (0) is unpredictable; avoid it. */ |
| if (sz == 0) |
| sz = 1; |
| return malloc (sz); /* ARI: malloc */ |
| } |
| |
| void * |
| operator new[] (std::size_t sz) |
| { |
| return ::operator new (sz); |
| } |
| |
| void* |
| operator new[] (std::size_t sz, const std::nothrow_t&) noexcept |
| { |
| return ::operator new (sz, std::nothrow); |
| } |
| #endif |