Add Embedded Swift Cxx exception personality #85492
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DougGregor
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Nov 13, 2025
| typealias _Unwind_Action = CInt | ||
| typealias _Unwind_Reason_Code = CInt | ||
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| @_cdecl |
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Users frequently run into a missing runtime symbol for Cxx exceptions (`_swift_exceptionPersonality`) when mixing Embedded Swift and Cxx with exceptions enabled. This leads to a confusing an hard to debug linker error. This commit adds an implementation of this function to the Embedded Swift runtime which simply fatal errors if a cxx exception is caught in a Swift frame. Issue: rdar://164423867 Issue: #85490
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@eeckstein do you know what the above "Missing delete message for function " error means? |
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Users frequently run into a missing runtime symbol for Cxx exceptions (
_swift_exceptionPersonality) when mixing Embedded Swift and Cxx with exceptions enabled. This leads to a confusing an hard to debug linker error. This commit adds an implementation of this function to the Embedded Swift runtime which simply fatal errors if a cxx exception is caught in a Swift frame.Issue: rdar://164423867
Issue: #85490