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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.
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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.h"
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#include "third_party/libcxx/exception"
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using namespace __cxxabiv1;
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namespace std {
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exception_ptr::~exception_ptr() _NOEXCEPT {
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__cxa_decrement_exception_refcount(__ptr_);
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}
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exception_ptr::exception_ptr(const exception_ptr& other) _NOEXCEPT
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: __ptr_(other.__ptr_)
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{
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__cxa_increment_exception_refcount(__ptr_);
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}
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exception_ptr& exception_ptr::operator=(const exception_ptr& other) _NOEXCEPT
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{
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if (__ptr_ != other.__ptr_)
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{
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__cxa_increment_exception_refcount(other.__ptr_);
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__cxa_decrement_exception_refcount(__ptr_);
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__ptr_ = other.__ptr_;
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}
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return *this;
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}
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nested_exception::nested_exception() _NOEXCEPT
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: __ptr_(current_exception())
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{
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}
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nested_exception::~nested_exception() _NOEXCEPT
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{
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}
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_LIBCPP_NORETURN
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void
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nested_exception::rethrow_nested() const
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{
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if (__ptr_ == nullptr)
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terminate();
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rethrow_exception(__ptr_);
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}
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exception_ptr current_exception() _NOEXCEPT
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{
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// be nicer if there was a constructor that took a ptr, then
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// this whole function would be just:
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// return exception_ptr(__cxa_current_primary_exception());
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exception_ptr ptr;
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ptr.__ptr_ = __cxa_current_primary_exception();
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return ptr;
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}
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_LIBCPP_NORETURN
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void rethrow_exception(exception_ptr p)
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{
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__cxa_rethrow_primary_exception(p.__ptr_);
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// if p.__ptr_ is NULL, above returns so we terminate
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terminate();
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}
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} // namespace std
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