<function name="util.funcuvname" parent="jit" type="libraryfunc"> <description> <deprecated>This function was disabled due to security concerns.</deprecated> Does the exact same thing as debug.getupvalue except it only returns the name, not the name and the object. The upvalue indexes also start at 0 rather than 1, so doing jit.util.funcuvname(func, 0) will get you the same name as debug.getupvalue(func, 1)⤶ Does the exact same thing as <page>debug.getupvalue</page> except it only returns the name, not the name and the object. The upvalue indexes also start at 0 rather than 1, so doing `jit.util.funcuvname(func, 0)` will get you the same name as `debug.getupvalue(func, 1)`⤶ <warning>This function isn't officially documented on LuaJIT wiki, use it at your own risk.</warning> </description> <realm>Shared and Menu</realm> <args> <arg name="func" type="function">Function to get the upvalue indexed from</arg> <arg name="index" type="number">The upvalue index, starting from 0</arg> </args> <rets> <ret name="" type="string">The function returns nil if there is no upvalue with the given index, otherwise the name of the upvalue is returned</ret> </rets> </function> <example> <description>Get the name of the first upvalue in hook.Add</description> <code> local a = jit.util.funcuvname(hook.Add, 0) local b = debug.getupvalue(hook.Add, 1) print(a) print(a == b) </code> <output> ``` isfunction true ``` </output> </example>