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This is functionally equivalent to the previous workflow_objc, with the
following changes:
1. It mutates the `core.function.metaAnalysis` workflow rather than
registering a new named workflow. The activities now all check for
the presence of the Objective-C metadata added by `ObjCProcessor` to
determine whether they should do work, rather than relying on
`MachoView` to override the function workflow when Objective-C
metadata is present. This fixes
https://github.com/Vector35/binaryninja-api/issues/6779.
2. The auto-inlining of `objc_msgSend` selector stub functions is
performed in a separate activity from the processing of
`objc_msgSend` call sites. The selector stub inlining activity is
configured so that it does not run in `DSCView` as the shared cache
needs different behavior for stub functions more generally that
`SharedCacheWorkflow` already provides.
3. The way that types like `id` and `SEL` are referenced is fixed so
that they show up as `id` rather than `objc_struct*`.
This also replaces the Objective-C portion of the shared cache's
workflow, and incorporates several bug fixes that had been applied to it
but not the standalone Objective-C workflow.
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