Igor’s Tip of the Week #177: Unused argument attribute

In one of the past tips we mentioned the __unused attribute which can be applied to function arguments. When can it be useful? 

Let’s consider this code from Apple’s dyld:

v19 is passed as fist argument to dyld4::ProcessConfig::PathOverrides::setString(). Since its name looks like a class method, the decompiler assigned the class type to the first argument (normally corresponding to the implicit this argument). However, strncmp returns a simple integer with the comparison result and has no relation to the PathOverrides …

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