Enough said about what? That there&#x27;s no current debugging (my claim) or that it&#x27;s impossible (his)?<p>&quot;Now, could one implement production debugging tooling in unikernels? In a word, no&quot;<p>That&#x27;s a lie: you could implement it. Debugging has been implemented for everything from ASIC&#x27;s to kernel mode to apps in other categories. Whether unikernel crowd wants to or will is another question. Not looking good there per Google. Him talking like it&#x27;s impossible shows he has an agenda, though.<p>I&#x27;m guessing he didn&#x27;t tell everyone to ditch the entire concept of Joylent&#x27;s offering early on because they were lacking some important features or properties. Just a guess but I&#x27;d bet on it.<p>EDIT: Changing search terms to &quot;debugging&quot; &quot;xen&quot; &quot;guests&quot; got me two results showing foundations are already built. Weak compared to UNIX but there.<p><a href="https:&#x2F;&#x2F;www.kernel.org&#x2F;doc&#x2F;ols&#x2F;2006&#x2F;ols2006v2-pages-9-24.pdf" rel="nofollow">https:&#x2F;&#x2F;www.kernel.org&#x2F;doc&#x2F;ols&#x2F;2006&#x2F;ols2006v2-pages-9-24.pdf</a><p><a href="http:&#x2F;&#x2F;www-archive.xenproject.org&#x2F;files&#x2F;xensummitboston08&#x2F;Mukesh%20xendbg-present.pdf" rel="nofollow">http:&#x2F;&#x2F;www-archive.xenproject.org&#x2F;files&#x2F;xensummitboston08&#x2F;Mu...</a>