com.apple.security.hardened-process.checked-allocations.enable-pure-data
A Boolean value that indicates whether to tag memory that contains only data.
Discussion
Adding an additional class of allocations for data improves security at the cost of memory and performance overhead.
To enable this entitlement for your app or extension in Xcode, first add the Enhanced Security capability. Then, under Memory Safety, select Memory Tag Pure Data.
For more information, see Enabling enhanced security for your app.