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3c95766e92
This implements P2546R5 (Debugging Support), including the P2810R4 (is_debugger_present is_replaceable) changes, allowing std::is_debugger_present to be replaced by the program. It would be good to provide a macOS definition of is_debugger_present as per https://developer.apple.com/library/archive/qa/qa1361/_index.html but that isn't included in this change. The src/c++26/debugging.cc file defines a global volatile int which can be set by debuggers to indicate when they are attached and detached from a running process. This allows std::is_debugger_present() to give a reliable answer, and additionally allows a debugger to choose how std::breakpoint() should behave. Setting the global to a positive value will cause std::breakpoint() to use that value as an argument to std::raise, so debuggers that prefer SIGABRT for breakpoints can select that. By default std::breakpoint() will use a platform-specific action such as the INT3 instruction on x86, or GCC's __builtin_trap(). On Linux the std::is_debugger_present() function checks whether the process is being traced by a process named "gdb", "gdbserver" or "lldb-server", to try to avoid interpreting other tracing processes (such as strace) as a debugger. There have been comments suggesting this isn't desirable and that std::is_debugger_present() should just return true for any tracing process (which is the case for non-Linux targets that support the ptrace system call). libstdc++-v3/ChangeLog: PR libstdc++/119670 * acinclude.m4 (GLIBCXX_CHECK_DEBUGGING): Check for facilities needed by <debugging>. * config.h.in: Regenerate. * configure: Regenerate. * configure.ac: Use GLIBCXX_CHECK_DEBUGGING. * include/Makefile.am: Add new header. * include/Makefile.in: Regenerate. * include/bits/version.def (debugging): Add. * include/bits/version.h: Regenerate. * include/precompiled/stdc++.h: Add new header. * src/c++26/Makefile.am: Add new file. * src/c++26/Makefile.in: Regenerate. * include/std/debugging: New file. * src/c++26/debugging.cc: New file. * testsuite/19_diagnostics/debugging/breakpoint.cc: New test. * testsuite/19_diagnostics/debugging/breakpoint_if_debugging.cc: New test. * testsuite/19_diagnostics/debugging/is_debugger_present.cc: New test. * testsuite/19_diagnostics/debugging/is_debugger_present-2.cc: New test. Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
248 lines
4.9 KiB
C++
248 lines
4.9 KiB
C++
// C++ includes used for precompiling -*- C++ -*-
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// Copyright (C) 2003-2025 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file stdc++.h
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* This is an implementation file for a precompiled header.
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*/
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// 17.4.1.2 Headers
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// C
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#ifndef _GLIBCXX_NO_ASSERT
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#include <cassert>
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#endif
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#include <cctype>
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#include <cfloat>
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#include <climits>
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#include <csetjmp>
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#include <cstdarg>
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#include <cstddef>
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#include <cstdlib>
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#if __cplusplus >= 201103L
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#include <cstdint>
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#if __cplusplus < 201703L
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#include <ciso646>
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#endif
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#endif
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// C++
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// #include <bitset>
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// #include <complex>
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#include <algorithm>
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#include <bitset>
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#include <functional>
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#include <iterator>
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#include <limits>
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#include <memory>
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#include <new>
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#include <numeric>
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#include <typeinfo>
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#include <utility>
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#if __cplusplus >= 201103L
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#include <array>
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#include <atomic>
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#include <initializer_list>
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#include <ratio>
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#include <scoped_allocator>
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#include <tuple>
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#include <typeindex>
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#include <type_traits>
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#endif
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#if __cplusplus >= 201402L
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#endif
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#if __cplusplus >= 201703L
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#include <any>
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// #include <execution>
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#include <optional>
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#include <variant>
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#include <string_view>
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#endif
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#if __cplusplus >= 202002L
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#include <bit>
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#include <compare>
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#include <concepts>
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#include <numbers>
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#include <ranges>
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#include <span>
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#include <source_location>
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#include <version>
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#if __cpp_impl_coroutine
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# include <coroutine>
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#endif
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#endif
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#if __cplusplus > 202002L
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#include <expected>
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#include <stdatomic.h>
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#endif
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#if _GLIBCXX_HOSTED
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// C
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#ifndef _GLIBCXX_NO_ASSERT
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#include <cassert>
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#endif
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#include <cctype>
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#include <cerrno>
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#include <cfloat>
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#include <climits>
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#include <clocale>
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#include <cmath>
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#include <csetjmp>
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#include <csignal>
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#include <cstdarg>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <ctime>
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#include <cwchar>
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#include <cwctype>
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#if __cplusplus >= 201103L
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#include <cfenv>
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#include <cinttypes>
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#include <cstdint>
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#include <cuchar>
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#if __cplusplus < 201703L
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#include <ccomplex>
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#include <cstdalign>
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#include <cstdbool>
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#include <ctgmath>
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#endif
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#endif
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// C++
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#include <complex>
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#include <deque>
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#include <exception>
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#include <fstream>
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#include <functional>
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#include <iomanip>
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#include <ios>
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#include <iosfwd>
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#include <iostream>
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#include <istream>
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#include <iterator>
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#include <limits>
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#include <list>
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#include <locale>
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#include <map>
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#include <memory>
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#include <new>
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#include <numeric>
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#include <ostream>
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#include <queue>
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#include <set>
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#include <sstream>
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#include <stack>
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#include <stdexcept>
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#include <streambuf>
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#include <string>
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#include <typeinfo>
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#include <utility>
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#include <valarray>
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#include <vector>
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#if __cplusplus >= 201103L
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#include <array>
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#include <atomic>
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#include <chrono>
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#include <codecvt>
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#include <condition_variable>
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#include <forward_list>
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#include <future>
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#include <initializer_list>
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#include <mutex>
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#include <random>
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#include <ratio>
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#include <regex>
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#include <scoped_allocator>
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#include <system_error>
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#include <thread>
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#include <tuple>
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#include <typeindex>
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#include <type_traits>
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#include <unordered_map>
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#include <unordered_set>
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#endif
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#if __cplusplus >= 201402L
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#include <shared_mutex>
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#endif
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#if __cplusplus >= 201703L
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#include <any>
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#include <charconv>
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// #include <execution>
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#include <filesystem>
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#include <optional>
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#include <memory_resource>
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#include <variant>
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#endif
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#if __cplusplus >= 202002L
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#include <barrier>
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#include <bit>
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#include <compare>
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#include <concepts>
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#include <format>
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#include <latch>
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#include <numbers>
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#include <ranges>
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#include <span>
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#include <stop_token>
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#include <semaphore>
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#include <source_location>
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#include <syncstream>
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#include <version>
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#endif
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#if __cplusplus > 202002L
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#include <expected>
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#include <flat_map>
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#include <flat_set>
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#include <generator>
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#include <mdspan>
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#include <print>
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#include <spanstream>
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#include <stacktrace>
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#include <stdatomic.h>
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#include <stdfloat>
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#endif
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#if __cplusplus > 202302L
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#include <debugging>
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#include <inplace_vector>
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#include <text_encoding>
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#include <stdbit.h>
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#include <stdckdint.h>
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#endif
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#endif // HOSTED
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