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Reentrancy icon

Status: New

So, i just found a bit of code with a parallell loop, containing a non reentrant vi, making it moot. I guess we've all been there, and those things can be hard to spot.


Suggestion: Mark reentrancy with an automatic small corner icon similar type def, e.g. in different colors depending on if it's Shared or preallocated.


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Active Participant

No, there are many other properties that one may find important enough to think it has to be a glyph for it on the icon. What makes reentrancy special? Maybe better to find a way to easily debug that scenario (like looking through each VIs setting manually, which doesn't take so much time).


Maybe you can identify a set of rules that applies to your application(s) for when a VI should be reentrant and make a test for that to catch it (VI analyzer?).

Certified LabVIEW Architect
Active Participant

I've always wanted a better indicator of reentrancy (and a few other properties), but I also understand the perils of adding more and more glyphs to the diagram.


The context help seems like the best contender as a suitable place to display such information. See related discussion here:

Chris Virgona
Proven Zealot

There could be a global setting dialog to turn on\off different icon overlays.


Sort of a show buffer allocations for icons.

Active Participant

Almost duplicate of


Similar to


The idea of temporarily displaying these kind of things like for showing buffer allocations is an interesting idea. Another way is to globally select what layers/types of glyphs/properties to view. A bit like defining a view in a CAD application (house architect analogy here): Do we want a plumbing/electrical view, do we want to see the furniture or not, and so on. Even defining view-presets for specific purposes, like debugging reentrancy issues e.g.

Certified LabVIEW Architect
Knight of NI

VI Analyzer has a "Reentrancy" test that would have found this issue.

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