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jit.util.funcuvname

<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 <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>

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