mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
143 lines
3.9 KiB
C++
143 lines
3.9 KiB
C++
/* Replace operator new/new[], for GDB, the GNU debugger.
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Copyright (C) 2016-2024 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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/* These are declared in <new> starting C++14, but removing them
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caused a build failure with clang. See PR build/31141. */
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extern void operator delete (void *p, std::size_t) noexcept;
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extern void operator delete[] (void *p, std::size_t) noexcept;
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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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/* Define also operators delete as one can LD_PRELOAD=libasan.so.*
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without recompiling the program with -fsanitize=address and then one would
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get false positive alloc-dealloc-mismatch (malloc vs operator delete [])
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errors from AddressSanitizers. */
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void
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operator delete (void *p) noexcept
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{
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free (p);
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}
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void
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operator delete (void *p, const std::nothrow_t&) noexcept
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{
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return ::operator delete (p);
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}
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void
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operator delete (void *p, std::size_t) noexcept
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{
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return ::operator delete (p, std::nothrow);
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}
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void
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operator delete[] (void *p) noexcept
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{
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return ::operator delete (p);
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}
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void
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operator delete[] (void *p, const std::nothrow_t&) noexcept
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{
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return ::operator delete (p, std::nothrow);
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}
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void
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operator delete[] (void *p, std::size_t) noexcept
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{
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return ::operator delete[] (p, std::nothrow);
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}
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#endif
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