cannot receive LUA_HOOKTAILRET event of tail call after debug.sethook

["cx0cx2001" <cx0cx2001@...>]

<code>

function hook(event)

    print(event);

end

 

function test1()

end

 

function test()

    return test1();

end

 

debug.sethook(hook, "cr");         

test();

</code>

 

The output of the above code is following:

call

call

return

 

The count of return hook is not same as the count of call hook.

I found that the return or tailretun event is missing when there is tail call.

Because of this bug, it's impossible to collect the function's execute time(between call hook and return hook) of lua code.

 

2016-06-05

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cx0cx2001