[release/10.0] Fix native EH in external shared libs on macOS - #131434
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[release/10.0] Fix native EH in external shared libs on macOS#131434github-actions[bot] wants to merge 2 commits into
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There is an exception-handling issue on macOS when throwing and catching some standard C++ exceptions in a native C++ lib. The hosts (dotnet, apphost, corerun, nethost) get local copies of typeinfo for several of these exceptions and these copies are not hidden. When an external shared library is loaded, the linker resolves references to those typeinfo instances to the local copies in the host instead of the ones in the libc++. That results in failures matching these exception types in c++ catch. The fix is to disable exporting symbols from these hosts (except for the _get_hostfxr_path from the nethost, which is needed)
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Backport of #130693 to release/10.0
/cc @janvorli
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IMPORTANT: If this backport is for a servicing release, please verify that:
release/X.0-staging, notrelease/X.0.release/X.0(no-stagingsuffix).Package authoring no longer needed in .NET 9
IMPORTANT: Starting with .NET 9, you no longer need to edit a NuGet package's csproj to enable building and bump the version.
Keep in mind that we still need package authoring in .NET 8 and older versions.