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Re: Clang code analysis buildbot
From: Guy Harris <guy () alum mit edu>
Date: Sat, 22 Mar 2014 10:54:34 -0700


On Mar 22, 2014, at 8:41 AM, Hadriel Kaplan <hadriel.kaplan () oracle com> wrote:


On Mar 21, 2014, at 5:31 PM, Guy Harris <guy () alum mit edu> wrote:

On Mar 21, 2014, at 2:18 PM, Hadriel Kaplan <hadriel.kaplan () oracle com> wrote:

How long does the clang code analysis buldbot

You mean the "beat the living hell out of Wireshark to look for bugs in many different ways" buildbot? :-)

What does it actually *do*?

The partial list in my previous message said:

        scan-build, running the Clang static analyzer;

        cov-build, building to prepare to hand Wireshark off to Coverity;

        fuzz-menagerie, repeatedly running fuzzed capture files through TShark to make sure it doesn't crash.

There's also a phase in which it runs capture files with random data ("random" in the sense of "generated by a 
pseudo-random number generator") through TShark as well.

It looks like some of the crash bugs it submits are GUI-specific

Unlikely, given that it's testing TShark, not Wireshark, with the fuzzed captures.  See tools/fuzz-test.sh.

and only occur way down the packet list, so presumably it actually loads the fuzzed files in wireshark

Nope.  It really does run them through TShark; where has the buildbot filed a bug in which *Wireshark* crashed?

Does it also try some of the graphs/analyzers?

No, it doesn't test any of the Wireshark GUI.

I ask because I can't repo a crash with bug 9887 by just viewing it,

Perhaps:

        1) for some unknown reason, it crashes on Ubuntu (64-bit x86) but not OS X (64-bit x86 in your case, as you 
are, as I remember, running a recent OS X version);

        2) you have different preferences set (I think the buildbot has an empty set of preferences, so the defaults 
are used);

        3) perhaps, for some reason, it crashes in TShark but doesn't crash in Wireshark - for example, if you don't 
have any color filters set and don't have a display filter, the path where it reads in the capture doesn't generate a 
protocol tree, but I think the TShark test generates a protocol tree.

but if I select Telephony->Voip Calls... boom goes the dynamite.

That might be a separate bug.

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