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8b33204f37
* third_party: Add libcxxabi Added libcxxabi from LLVM 17.0.6 The library implements the Itanium C++ exception handling ABI. * third_party/libcxxabi: Enable __cxa_thread_atexit Enable `__cxa_thread_atexit` from libcxxabi. `__cxa_thread_atexit_impl` is still implemented by the cosmo libc. The original `__cxa_thread_atexit` has been removed. * third_party/libcxx: Build with exceptions Build libcxx with exceptions enabled. - Removed `_LIBCPP_NO_EXCEPTIONS` from `__config`. - Switched the exception implementation to `libcxxabi`. These two files are taken from the same `libcxx` version as mentioned in `README.cosmo`. - Removed `new_handler_fallback` in favor of `libcxxabi` implementation. - Enable `-fexceptions` and `-frtti` for `libcxx`. - Removed `THIRD_PARTY_LIBCXX` dependency from `libcxxabi` and `libunwind`. These libraries do not use any runtime `libcxx` functions, just headers. * libc: Remove remaining redundant cxa functions - `__cxa_pure_virtual` in `libcxxabi` is also a stub similar to the existing one. - `__cxa_guard_*` from `libcxxabi` is used instead of the ones from Android. Now there should be no more duplicate implementations. `__cxa_thread_atexit_impl`, `__cxa_atexit`, and related supporting functions, are still left to other libraries as in `libcxxabi`. `libcxxabi` is also now added to `cosmopolitan.a` to make up for the removed functions. Affected in-tree libraries (`third_party/double-conversion`) have been updated.
105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
//===--- DemangleConfig.h --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// This file is contains a subset of macros copied from
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// llvm/include/llvm/Demangle/DemangleConfig.h
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//===----------------------------------------------------------------------===//
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#ifndef LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
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#define LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
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// Must be defined before pulling in headers from libc++. Allow downstream
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// build systems to override this value.
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// https://libcxx.llvm.org/UsingLibcxx.html#enabling-the-safe-libc-mode
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#ifndef _LIBCPP_VERBOSE_ABORT
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#define _LIBCPP_VERBOSE_ABORT(...) abort_message(__VA_ARGS__)
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#include "third_party/libcxxabi/abort_message.h"
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#endif
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#include "third_party/libcxx/ciso646"
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#ifdef _MSC_VER
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// snprintf is implemented in VS 2015
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#if _MSC_VER < 1900
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#define snprintf _snprintf_s
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#endif
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#endif
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#ifndef __has_cpp_attribute
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#define __has_cpp_attribute(x) 0
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#endif
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#ifndef DEMANGLE_GNUC_PREREQ
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#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
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#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
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((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \
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((maj) << 20) + ((min) << 10) + (patch))
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#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
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#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \
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((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10))
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#else
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#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0
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#endif
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#endif
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#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0)
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#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__))
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#else
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#define DEMANGLE_ATTRIBUTE_USED
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#endif
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#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0)
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#define DEMANGLE_UNREACHABLE __builtin_unreachable()
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#elif defined(_MSC_VER)
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#define DEMANGLE_UNREACHABLE __assume(false)
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#else
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#define DEMANGLE_UNREACHABLE
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#endif
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#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0)
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#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline))
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#elif defined(_MSC_VER)
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#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline)
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#else
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#define DEMANGLE_ATTRIBUTE_NOINLINE
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#endif
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#if !defined(NDEBUG)
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#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED
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#else
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#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE
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#endif
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#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
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#define DEMANGLE_FALLTHROUGH [[fallthrough]]
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#elif __has_cpp_attribute(gnu::fallthrough)
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#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]]
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#elif !__cplusplus
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// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious
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// error when __has_cpp_attribute is given a scoped attribute in C mode.
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#define DEMANGLE_FALLTHROUGH
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#elif __has_cpp_attribute(clang::fallthrough)
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#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]]
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#else
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#define DEMANGLE_FALLTHROUGH
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#endif
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#define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle {
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#define DEMANGLE_NAMESPACE_END } }
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#endif // LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H
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