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backed by a database
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Handle the case where the `class` field of the category is a direct
reference to an external symbol via a bind fixup. In that case, the
pointer's value when read from the view is 0. To determine the class
name it is necessary to look up the relocation for the pointer's address
and parse the class name from the symbol's name.
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- Removed last use of user object creation in objective-c
- Fixed function type info being omitted from certain images loaded automatically
- Add TODO about undo action in view init. This is not critical, just a non-actionable warning because of a design flaw
I will restate this again for anyone in the future, until the undo action system is thread-safe avoid calling it from any thread other than the main thread, it is very easy to deadlock or cause other issues. That goes for basically all user analysis object creation.
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They were previously relying on the Objective-C workflow to render the
`rptr_t` typedef. Relative pointer types are now a first class citizen
and are rendered correctly without any additional work.
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This made the macho objective-c processor aware of images and was passed around everywhere, instead we have an overridable section getter that gives the control over the section retrieval to the derived processor.
In the case of shared cache this means we can store the image to be processed and then use the header to locate the relevant sections.
Fixes: https://github.com/Vector35/binaryninja-api/issues/6594
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The logic for determining the class name of a category did not correctly
handle classes defined in other images in the shared cache. There were
two problems:
1. If the class is defined in another image that is already loaded,
`ObjCProcessor` has already renamed the symbol from `_OBJC_CLASS_$_`
to `cls_`. Both forms of symbol name are now handled.
2. If the class is defined in an image that is not yet loaded, no symbol
name is available. The category's class is now looked up in the
shared cache symbol table, and the symbol's name is parsed as if it
were an import symbol.
This fixes almost all cases of "Failed to determine base classname for
category" that I have come across.
Mason Reed: Fixed up to make objective-c processor always consult GetSymbol
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In absence of a better name, this commit refactors the shared cache code.
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Both the Macho and DSC views need to process Objective-C but have separate processor classes. It would appear that the DSC version was largely a copy and paste of the Macho view one, with some modifications. The majority of code overlaps between the 2 so it doesn't make sense to maintain 2 and copy and paste improvements/fixes between them.
This commit fixes that by creating a base Objective-C processor that contains the shared code. View specific code is implemented in the respective subclasses for the views. Although there is very little view specific code for each.
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