svn commit: r261071 - in head: contrib/jemalloc contrib/jemalloc/doc contrib/jemalloc/include/jemalloc contrib/jemalloc/include/jemalloc/internal contrib/jemalloc/src include lib/libc/gen lib/libc/...

[Lawrence Stewart]

On 02/07/14 16:06, Jason Evans wrote:
> On Feb 6, 2014, at 8:01 PM, Lawrence Stewart <lstewart at freebsd.org>
> wrote:
>> On 01/23/14 13:47, Jason Evans wrote:
>>> Author: jasone Date: Thu Jan 23 02:47:36 2014 New Revision:
>>> 261071 URL: http://svnweb.freebsd.org/changeset/base/261071
>>> 
>>> Log: Update jemalloc to version 3.5.0.
>> 
>> I suspect that this commit is related to the assertion failures
>> I've been seeing on recent head when I updated from r260427 to
>> r261453. Here's two I noticed today:
>> 
>> <jemalloc>: 
>> /usr/local/poudriere/jails/head-amd64/usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/arena.h:7
>>
>> 
76: Failed assertion: "binind == actual_binind"
>> *** Signal 6
>> 
>> and
>> 
>> <jemalloc>: 
>> /usr/src/lib/libc/../../contrib/jemalloc/include/jemalloc/internal/arena.h:776:
>>
>> 
Failed assertion: "binind == actual_binind"
>> Abort trap
>> 
>> I seem to be able to reproduce the first one readily when
>> poudriere tries to build chromium so I can provide more info and
>> help test ideas.
>> 
>> Cheers, Lawrence
> 
> Are the failures you saw happening only for the chromium build, or
> have you seen that same failure for other things as well?

Other things as well. The second example came from a completely
unrelated app - dnsmasq if I remember correctly. The assertion failures
are not deterministic. I do recall the machine was using a fairly
substantial amount of swap at the time which might be relevant, as I
haven't noted a failure recently since rebooting the laptop.

> If this is an application bug, it’s probably due do a buffer overrun
> corrupting an adjacent page that contains page run metadata.  If it’s
> a jemalloc bug, I’m going to need to reproduce it and dig in; it’s
> unlikely to be easy to diagnose.

I'll keep an eye out for further failures and see if I can figure out a
reproduction recipe.

Cheers,
Lawrence