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[PAC] Make __is_function_overridden pauth-aware on ELF platforms #107498

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Merged
merged 1 commit into from
Sep 9, 2024
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[PAC] Make __is_function_overridden pauth-aware on ELF platforms #107498

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5 changes: 5 additions & 0 deletions libcxx/src/include/overridable_function.h
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Original file line number Diff line number Diff line change
Expand Up @@ -116,6 +116,11 @@ _LIBCPP_HIDE_FROM_ABI bool __is_function_overridden(_Ret (*__fptr)(_Args...)) no
uintptr_t __end = reinterpret_cast<uintptr_t>(&__stop___lcxx_override);
uintptr_t __ptr = reinterpret_cast<uintptr_t>(__fptr);

# if __has_feature(ptrauth_calls)
// We must pass a void* to ptrauth_strip since it only accepts a pointer type. See full explanation above.
__ptr = reinterpret_cast<uintptr_t>(ptrauth_strip(reinterpret_cast<void*>(__ptr), ptrauth_key_function_pointer));
# endif

return __ptr < __start || __ptr > __end;
}
_LIBCPP_END_NAMESPACE_STD
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