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06b3c5bdb0
This patch renames the .c source files in gdbsupport to .cc.
In the gdb directory, there is an argument against renaming the source
files, which is that it makes using some git commands more difficult to
do archeology. Some commands have some kind of "follow" option that
makes git try to follow renames, but it doesn't work in all situations.
Given that we have just moved the gdbsupport directory, that argument
doesn't hold for source files in that directory. I therefore suggest
renaming them to .cc, so that they are automatically recognized as C++
by various tools and editors.
The original motivation behind this is that when building gdbsupport
with clang, I get:
CC agent.o
clang: error: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Werror,-Wdeprecated]
In the gdb/ directory, we make clang happy by passing "-x c++". We
could do this in gdbsupport too, but I think that renaming the files is
a better long-term solution.
gdbserver still does its own build of gdbsupport, so a few changes in
its Makefile are necessary.
gdbsupport/ChangeLog:
* Makefile.am: Rename source files from .c to .cc.
(CC, CFLAGS): Don't override.
(AM_CFLAGS): Rename to ...
(AM_CXXFLAGS): ... this.
* Makefile.in: Re-generate.
* %.c: Rename to %.cc.
gdbserver/ChangeLog:
* Makefile.in: Rename gdbsupport source files from .c to .cc.
96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
/* Replace operator new/new[], for GDB, the GNU debugger.
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Copyright (C) 2016-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* GCC does not understand __has_feature. */
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#if !defined(__has_feature)
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# define __has_feature(x) 0
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#endif
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#if !__has_feature(address_sanitizer) && !defined(__SANITIZE_ADDRESS__)
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#include "common-defs.h"
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#include "host-defs.h"
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#include <new>
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/* Override operator new / operator new[], in order to internal_error
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on allocation failure and thus query the user for abort/core
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dump/continue, just like xmalloc does. We don't do this from a
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new-handler function instead (std::set_new_handler) because we want
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to catch allocation errors from within global constructors too.
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Skip overriding if building with -fsanitize=address though.
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Address sanitizer wants to override operator new/delete too in
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order to detect malloc+delete and new+free mismatches. Our
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versions would mask out ASan's, with the result of losing that
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useful mismatch detection.
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Note that C++ implementations could either have their throw
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versions call the nothrow versions (libstdc++), or the other way
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around (clang/libc++). For that reason, we replace both throw and
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nothrow variants and call malloc directly. */
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void *
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operator new (std::size_t sz)
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{
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/* malloc (0) is unpredictable; avoid it. */
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if (sz == 0)
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sz = 1;
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void *p = malloc (sz); /* ARI: malloc */
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if (p == NULL)
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{
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/* If the user decides to continue debugging, throw a
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gdb_quit_bad_alloc exception instead of a regular QUIT
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gdb_exception. The former extends both std::bad_alloc and a
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QUIT gdb_exception. This is necessary because operator new
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can only ever throw std::bad_alloc, or something that extends
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it. */
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try
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{
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malloc_failure (sz);
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}
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catch (gdb_exception &ex)
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{
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throw gdb_quit_bad_alloc (std::move (ex));
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}
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}
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return p;
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}
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void *
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operator new (std::size_t sz, const std::nothrow_t&) noexcept
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{
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/* malloc (0) is unpredictable; avoid it. */
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if (sz == 0)
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sz = 1;
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return malloc (sz); /* ARI: malloc */
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}
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void *
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operator new[] (std::size_t sz)
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{
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return ::operator new (sz);
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}
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void*
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operator new[] (std::size_t sz, const std::nothrow_t&) noexcept
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{
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return ::operator new (sz, std::nothrow);
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}
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#endif
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