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* 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.
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
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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//
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// This file implements the functionality associated with the terminate_handler,
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// unexpected_handler, and new_handler.
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//===----------------------------------------------------------------------===//
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#ifndef _CXA_HANDLERS_H
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#define _CXA_HANDLERS_H
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#include "third_party/libcxxabi/include/__cxxabi_config.h"
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#include "third_party/libcxx/exception"
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namespace std
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{
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_LIBCXXABI_HIDDEN _LIBCXXABI_NORETURN
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void
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__unexpected(unexpected_handler func);
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_LIBCXXABI_HIDDEN _LIBCXXABI_NORETURN
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void
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__terminate(terminate_handler func) noexcept;
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} // std
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extern "C"
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{
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_LIBCXXABI_DATA_VIS extern void (*__cxa_terminate_handler)();
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_LIBCXXABI_DATA_VIS extern void (*__cxa_unexpected_handler)();
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_LIBCXXABI_DATA_VIS extern void (*__cxa_new_handler)();
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/*
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At some point in the future these three symbols will become
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C++11 atomic variables:
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extern std::atomic<std::terminate_handler> __cxa_terminate_handler;
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extern std::atomic<std::unexpected_handler> __cxa_unexpected_handler;
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extern std::atomic<std::new_handler> __cxa_new_handler;
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This change will not impact their ABI. But it will allow for a
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portable performance optimization.
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*/
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} // extern "C"
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#endif // _CXA_HANDLERS_H
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