pub unsafe extern "C" fn weld_runst_realloc(
    run: WeldRuntimeContextRef,
    ptr: Ptr,
    newsize: i64,
) -> Ptr {
    let run = &mut *run;
    run.realloc(ptr, newsize)
}
Reallocate memory within the provided context.

This function has semantics equal to the `realloc` function.
weld/src/runtime/ffi.rs