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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.
53 lines
1.8 KiB
C++
53 lines
1.8 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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#include "third_party/libcxxabi/include/__cxxabi_config.h"
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#include "third_party/libcxxabi/include/cxxabi.h"
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// Tell the implementation that we're building the actual implementation
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// (and not testing it)
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#define BUILDING_CXA_GUARD
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#include "third_party/libcxxabi/cxa_guard_impl.h"
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/*
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This implementation must be careful to not call code external to this file
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which will turn around and try to call __cxa_guard_acquire reentrantly.
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For this reason, the headers of this file are as restricted as possible.
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Previous implementations of this code for __APPLE__ have used
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std::__libcpp_mutex_lock and the abort_message utility without problem. This
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implementation also uses std::__libcpp_condvar_wait which has tested
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to not be a problem.
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*/
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namespace __cxxabiv1 {
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#if defined(_LIBCXXABI_GUARD_ABI_ARM)
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using guard_type = uint32_t;
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#else
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using guard_type = uint64_t;
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#endif
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extern "C"
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{
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_LIBCXXABI_FUNC_VIS int __cxa_guard_acquire(guard_type* raw_guard_object) {
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SelectedImplementation imp(raw_guard_object);
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return static_cast<int>(imp.cxa_guard_acquire());
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}
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_LIBCXXABI_FUNC_VIS void __cxa_guard_release(guard_type *raw_guard_object) {
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SelectedImplementation imp(raw_guard_object);
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imp.cxa_guard_release();
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}
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_LIBCXXABI_FUNC_VIS void __cxa_guard_abort(guard_type *raw_guard_object) {
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SelectedImplementation imp(raw_guard_object);
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imp.cxa_guard_abort();
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}
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} // extern "C"
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} // __cxxabiv1
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