iOS can't find sym is_import

[piaoapiao]

Description

File "/Users/xxx/Desktop/deobf/code/2/angr-examples/angr-hook2.py", line 45, in
proj.hook_symbol("_scanf", ReplaceScanf())
File "/Users/xxx/.pyenv/versions/3.11.8/lib/python3.11/site-packages/angr/project.py", line 603, in hook_symbol
sym = self.loader.find_symbol(symbol_name)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/xxx/.pyenv/versions/3.11.8/lib/python3.11/site-packages/cle/loader.py", line 610, in find_symbol
if sym.is_import:
^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'is_import'

Steps to reproduce the bug

No response

Environment

Mac OSX 15.4 (24E248)

test iOS mach-o file

Additional context

No response

[fmagin]

The problem is related to #194

This is arguably a limitation of CLE: CLE assumes that there is only one symbol of a certain name, but this isn't true for Mach-O

[rhelmot]

@fmagin can you please do the following when you have time:

• make the find_symbol method behave correctly (i.e. return Symbol | None) for mach-o binaries, either by returning None or the first symbol in case of duplicates
• Add a new method to Loader, find_all_symbols, which returns a list in all cases
• Change angr.Project to use find_all_symbols while setting up simprocedures