[libc++] Adds __throw_system_error overload.

[Mordante]

Summary

This was mention in D150044 and D154995 that this would be useful.
This addresses the last review coment of D150044.

[Mordante]

Update ABI lists and enable entire CI.

[Mordante]

CI fixes.

[ldionne]

libcxx/src/system_error.cpp

279

I think we should try to avoid adding this to the dylib, since otherwise we need to introduce a new availability macro just for this function. I would just define it in the headers.

[Mordante]

Rebased and addresses review comments.

[mysterymath]

It looks like this change is a likely root cause for a size regression on Fuchsia. In particular, Fuchsia maintains a hermetic -fno-exceptions multilib of libc++.a that is statically linked into other binaries/libraries. Previously, the no-exceptions version of this code didn't depend on the error code or category libraries, but this change seems to bring them into the link unnecessarily. Would it be possible to revert this or to fix it forward to keep the no-exception case separate from these routines?

libcxx/include/__system_error/system_error.h

public:
   ~system_error() _NOEXCEPT override;
 
   _LIBCPP_HIDE_FROM_ABI const error_code& code() const _NOEXCEPT { return __ec_; }
 
 private:
   static string __init(const error_code&, string);
 };
 
+_LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __throw_system_error(error_code __ec, const char* __what_arg);
 _LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __throw_system_error(int __ev, const char* __what_arg);
 
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // _LIBCPP___SYSTEM_ERROR_SYSTEM_ERROR_H

libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist

 {'is_defined': True, 'name': '__ZNSt3__119__shared_weak_countD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119__thread_local_dataEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119declare_no_pointersEPcm', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__get_collation_nameEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEEx', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__libcpp_atomic_waitEPVKvx', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__throw_system_errorEiPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121__throw_runtime_errorEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121__undeclare_reachableEPv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex4lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex6unlockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex8try_lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutexC1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutexC2Ev', 'type': 'FUNC'}

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 {'is_defined': True, 'name': '___cxa_vec_delete3', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_dtor', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new2', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new3', 'type': 'I'}
 {'is_defined': True, 'name': '___dynamic_cast', 'type': 'I'}
 {'is_defined': True, 'name': '___gxx_personality_v0', 'type': 'I'}
 No newline at end of file

libcxx/lib/abi/powerpc-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist

 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD0Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__thread_local_dataEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119declare_no_pointersEPcm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__get_collation_nameEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIiNS_22__cxx_atomic_base_implIiEEEEi', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKvi', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorEiPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121__throw_runtime_errorEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121__undeclare_reachableEPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex4lockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex6unlockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex8try_lockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}

 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnamSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znwm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnwmSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 No newline at end of file

libcxx/lib/abi/powerpc64-ibm-aix.libcxxabi.v1.stable.exceptions.nonew.abilist

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 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119__thread_local_dataEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__119declare_no_pointersEPcm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__get_collation_nameEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
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 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKvl', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
+{'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorEiPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121__throw_runtime_errorEPKc', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121__undeclare_reachableEPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex4lockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex6unlockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex8try_lockEv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC1Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'EXP', 'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC2Ev', 'storage_mapping_class': 'DS', 'type': 'FUNC'}

 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdaPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPv', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZdlPvSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znam', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnamSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_Znwm', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 {'import_export': 'wIMP', 'is_defined': False, 'name': '_ZnwmSt11align_val_t', 'storage_mapping_class': 'DS', 'type': 'FUNC'}
 No newline at end of file

libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.nonew.abilist

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 {'is_defined': True, 'name': '__ZNSt3__119__thread_local_dataEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__119declare_no_pointersEPcm', 'type': 'FUNC'}
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 {'is_defined': True, 'name': '__ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIxNS_22__cxx_atomic_base_implIxEEEEx', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__libcpp_atomic_waitEPVKvx', 'type': 'FUNC'}
+{'is_defined': True, 'name': '__ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__120__throw_system_errorEiPKc', 'type': 'FUNC'}
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 {'is_defined': True, 'name': '__ZNSt3__121__undeclare_reachableEPv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex4lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex6unlockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutex8try_lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutexC1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '__ZNSt3__121recursive_timed_mutexC2Ev', 'type': 'FUNC'}

 {'is_defined': True, 'name': '___cxa_vec_delete2', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_delete3', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_dtor', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new2', 'type': 'I'}
 {'is_defined': True, 'name': '___cxa_vec_new3', 'type': 'I'}
 {'is_defined': True, 'name': '___dynamic_cast', 'type': 'I'}
 {'is_defined': True, 'name': '___gxx_personality_v0', 'type': 'I'}
 No newline at end of file

libcxx/lib/abi/x86_64-unknown-freebsd.libcxxabi.v1.stable.exceptions.nonew.abilist

 {'is_defined': True, 'name': '_ZNSt3__119__shared_weak_countD2Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__119__thread_local_dataEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__119basic_istringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__119basic_ostringstreamIcNS_11char_traitsIcEENS_9allocatorIcEEEaSEOS5_', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__119declare_no_pointersEPcm', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__get_collation_nameEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIlNS_22__cxx_atomic_base_implIlEEEEl', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKvl', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorEiPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121__throw_runtime_errorEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121__undeclare_reachableEPv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex4lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex6unlockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex8try_lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC2Ev', 'type': 'FUNC'}

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 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__113basic_ostreamIcNS_11char_traitsIcEEED1Ev', 'type': 'FUNC'}
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 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__114basic_iostreamIcNS_11char_traitsIcEEED0Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__114basic_iostreamIcNS_11char_traitsIcEEED1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__19strstreamD0Ev', 'type': 'FUNC'}
-{'is_defined': True, 'name': '_ZTv0_n24_NSt3__19strstreamD1Ev', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZTv0_n24_NSt3__19strstreamD1Ev', 'type': 'FUNC'}
 No newline at end of file

libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.nonew.abilist

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 {'is_defined': True, 'name': '_ZNSt3__119__thread_local_dataEv', 'type': 'FUNC'}
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 {'is_defined': True, 'name': '_ZNSt3__120__get_collation_nameEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKNS_17__cxx_atomic_implIiNS_22__cxx_atomic_base_implIiEEEEi', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__libcpp_atomic_waitEPVKvi', 'type': 'FUNC'}
+{'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorENS_10error_codeEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__120__throw_system_errorEiPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121__throw_runtime_errorEPKc', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121__undeclare_reachableEPv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex4lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex6unlockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutex8try_lockEv', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZNSt3__121recursive_timed_mutexC2Ev', 'type': 'FUNC'}

 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__113basic_ostreamIcNS_11char_traitsIcEEED0Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__113basic_ostreamIcNS_11char_traitsIcEEED1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__113basic_ostreamIwNS_11char_traitsIwEEED0Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__113basic_ostreamIwNS_11char_traitsIwEEED1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__114basic_iostreamIcNS_11char_traitsIcEEED0Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__114basic_iostreamIcNS_11char_traitsIcEEED1Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__19strstreamD0Ev', 'type': 'FUNC'}
 {'is_defined': True, 'name': '_ZTv0_n24_NSt3__19strstreamD1Ev', 'type': 'FUNC'}
 No newline at end of file

libcxx/src/print.cpp

 _LIBCPP_EXPORTED_FROM_ABI void
 __write_to_windows_console([[maybe_unused]] FILE* __stream, [[maybe_unused]] wstring_view __view) {
   // https://learn.microsoft.com/en-us/windows/console/writeconsole
   if (WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fileno(__stream))), // clang-format aid
                     __view.data(),
                     __view.size(),
                     nullptr,
                     nullptr) == 0) {
-#    ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    // There is no __throw_system_error overload that takes an error code.
-    throw system_error{filesystem::detail::make_windows_error(GetLastError()), "failed to write formatted output"};
-#    else  // _LIBCPP_HAS_NO_EXCEPTIONS
-    std::abort();
-#    endif // _LIBCPP_HAS_NO_EXCEPTIONS
+    __throw_system_error(filesystem::detail::make_windows_error(GetLastError()), "failed to write formatted output");
   }
 }
 #  endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 #endif // _WIN32
 
 _LIBCPP_END_NAMESPACE_STD

libcxx/src/system_error.cpp

 system_error::system_error(int ev, const error_category& ecat, const char* what_arg)
     : runtime_error(__init(error_code(ev, ecat), what_arg)),
       __ec_(error_code(ev, ecat))
 {
 }
 
 system_error::system_error(int ev, const error_category& ecat)
     : runtime_error(__init(error_code(ev, ecat), "")),
       __ec_(error_code(ev, ecat))
 {
 }
 
 system_error::~system_error() noexcept
 {
 }
 
-void
-__throw_system_error(int ev, const char* what_arg)
-{
+void __throw_system_error(error_code ec, const char* what_arg) {
 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS
-    throw system_error(error_code(ev, system_category()), what_arg);
+    throw system_error(ec, what_arg);
 #else
-    _LIBCPP_VERBOSE_ABORT("system_error was thrown in -fno-exceptions mode with error %i and message \"%s\"", ev, what_arg);
+    _LIBCPP_VERBOSE_ABORT(
+        "system_error was thrown in -fno-exceptions mode with error %i and message \"%s\"", ev, what_arg);
 #endif
 }
 
+void __throw_system_error(int ev, const char* what_arg) {
+    std::__throw_system_error(error_code(ev, system_category()), what_arg);
+}
+
 _LIBCPP_END_NAMESPACE_STD