| Age | Commit message (Collapse) | Author |
|---|
|
|
|
Find the relative selector base address in the Objective-C optimization
data pointed to by the shared cache header, rather than via
`__objc_scoffs`. This is only present on iOS, and not for every iOS
version that encodes selectors via direct offsets.
This also includes some related improvements:
1. Direct selectors get their own pointer type so they're rendered
correctly in the view.
2. Method lists encoded as lists of lists are now handled.
3. The `dyld_cache_header` type added to the view is truncated to the
length in the loaded cache. This ensures it is applied to the view.
4. A couple of methods that process method IMPs and selectors are
updated to check whether the address is valid before attempting to
process them. They would otherwise fail by throwing an exception if
they proceed, but checking for validity is quicker and makes
exception breakpoints usable.
|
|
Prior to this commit the function `DSCObjCProcessor::PostProcessObjCSections` never does anything because it doesn't use the correct names to get the Objective-C sections of the recently loaded library. In fact it never does anything because the DSC never has sections with the names its searching for.
This commit passes the `baseName` (the name of the library that was loaded), which is what other Objective-C section processing code does. Combining the base name with the section names it will now find them and process them as intended. This was resulting in alot of Objective-C related stuff being missed.
There is however still an issue of the fact that the way this DSC plugin works means it only analyzes Objective-C sections once. This catches alot of things but there are a number of cases where other libraries need to be loaded first due to information being referenced in another library. For instance errors like `Failed to determine base classname for category` can be caused by the class reference in the category being to a class outside of the loaded library. Once the library containing the class has been loaded, the section containing the category should be re-proccessed.
|
|
|
|
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.
|
