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Check if hooked correctly #3

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Merged
merged 1 commit into from
Feb 13, 2024
Merged

Check if hooked correctly #3

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22 changes: 19 additions & 3 deletions Sources/SwiftHook/SwiftHook+function.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -102,18 +102,34 @@ extension SwiftHook {
print(firstSymbol, secondSymbol)
#endif

var replaced1 = UnsafeMutableRawPointer(bitPattern: -1)
var replaced2 = UnsafeMutableRawPointer(bitPattern: -1)

let f2s: Bool = rebindSymbol(
name: first,
replacement: secondSymbol,
replaced: nil
replaced: &replaced1
)
let s2f: Bool = rebindSymbol(
name: second,
replacement: firstSymbol,
replaced: nil
replaced: &replaced2
)

return f2s && s2f
guard f2s && s2f else {
return false
}

guard let replaced1, let replaced2,
Int(bitPattern: replaced1) != -1,
Int(bitPattern: replaced2) != -1 else {
#if DEBUG
print("target function is not used.")
#endif
return true
}

return true
}
return false
}
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