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Split out from https://github.com/WeiN76LQh/binaryninja-api/tree/process-local-symbols
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Fixes MSVC C++17 failing to compile, hopefully.
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`MetadataSerializable` is updated to allow a subclass to optionally
specify the return type of `Load`. If not specified it defaults to the
subclass itself. `SharedCache` specifies `std::optional` to represent
the case where the serialized metadata is in a format or version it does
not recognize.
By making `Load` a static member function and having it return a new
object it becomes easier to reason about the state of objects when a
deserialization failure occurs. It can return `std::optional` to
indicate failure and there is no object left in an unknown state.
Prior to this, `Load` worked on an existing instance of an object. It
was unclear what state the object would be in if a deserialization
failure occurred (its original state prior to `Load`? some
partially-loaded state? a null state?). The failure itself also had to
be communicated out of band.
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A problem with processing Objective-C sections at the time a library is loaded is that some of the references within those sections may refer to unload sections. This results in things like selectors not being correctly typed and named.
This commit provides a way for users to manually trigger Objective-C parsing against sections for a specific library or all libraries, via the API. Combined with the previous commit a user can use the API to batch load a number of libraries and skip Objective-C processing for each one and then run it across the entire of the DSC once they are all loaded.
Further improvement would be to provide a way to trigger Objective-C processing through the UI.
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library
This is useful when batch loading libraries to avoid extra processing (once the next commit has landed).
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api/MetadataSerializable.hpp is removed in favor of including
core/MetadataSerializable.hpp. Both headers defined types with the same
name leading to One Definition Rule violations and surprising behavior.
The serialization and deserialization context are now created on-demand
during serialization rather than being a member of
`MetadataSerializable`. This reduces the size of every serializable
object by ~220 bytes.
The context is passed explicitly as an argument to `Serialize` /
`Deserialize`. As a result, `Serialize` / `Deserialize` can now be free
functions rather than member functions.
Since `MetadataSerializable` is not used for dynamic dispatch,
the virtual methods are removed and the class is updated to be a class
template using CRTP. This allows delegating to the derived class's
`Load` and `Store` methods without the additional size overhead of the
vtable pointer in every serializable object.
These changes reduce the memory footprint of Binary Ninja after loading
the macOS shared cache and loading a single dylib from it from 8.3GB to
4.6GB.
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This is an early release of our DSC processing plugin. We're still hard at work improving this feature. You should be able to just drop in a dyld_shared_cache and use the 'Shared Cache Triage' view to load and analyze images.
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