Re: Yet another profiler crash [Was: Re: Issues for 24.3]

[YAMAMOTO Mitsuharu]

>>>>> On Mon, 28 Jan 2013 09:37:14 +0400, Dmitry Antipov <address@hidden> said:

>>> Crash related to new profiler?
>>> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13545
>> 
>> A recipe was requested, but no response.

> This crash is likely caused by C stack overflow and may be really
> hard to reproduce.

Can we make sure that keys (backtraces?) in the hash tables used in
the profiler are always acyclic?  Otherwise, using the `equal' test
for such keys are wrong and may lead to stack overflow, because an
error signal triggers another hash table operation in the profiler.

I noticed that the emacs-24 branch used the `equal' test, but the
trunk used a specialized function (cmpfn_profiler) for comparing keys.
Probably the issue is fixed in the trunk.

                                     YAMAMOTO Mitsuharu
                                address@hidden