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operations
A new activity is added that will remove calls to `objc_retain`,
`objc_release`, `objc_autorelease`, and related functions. It is
disabled by default due to the fact it changes the semantics of the
code. It can be enabled on a per-function basis via the Function
Settings context menu or command palette entry. Alternatively, it can be
enabled in Open with Options or in user settings if a user would prefer
it be on for an entire file or for all files they open.
For now the activity is only eligible within arm64 binaries. Supporting
x86_64 will require matching some slightly different IL patterns.
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Calls to `objc_msgSendSuper2` with a selector in the `init` family are
detected and their arguments are analyzed to determine the receiver
class. A call type adjustment is added to update the return type.
This handles most calls to `[super init]` from Objective-C code as the
compiler generates a straightforward code sequence for these calls. Some
calls from Swift are handled, but the Swift compiler generates more varied
code so additional work is needed for complete coverage.
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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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Calls to `Workflow::Instance` that were looking up a built-in workflow
name are updated to use `Workflow::Get`. Others use `Workflow::GetOrCreate`.
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C++ plug-ins now consistently use the `plugin_rpath` or
`ui_plugin_rpath` macros to ensure they have `SKIP_BUILD_RPATH` set when
building on Mac (i.e., no `LC_RPATH` is added).
Rust plug-ins have their build.rs updated to only specify `-Wl,-rpath`
when building for Linux. It is not needed on macOS. On macOS we instead
explicitly specify an `@rpath`-relative install name. This doesn't
change any behavior, but avoids leaving an absolute path as the
library's install name and is consistent with CMake's behavior for C++
plug-ins.
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This reverts commit 5bafe5c7bdb0b56037a0b5c573236f9c6367353a.
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analysis.objectiveC.resolveDynamicDispatch is enabled
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objc_msgSend stub
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