How to track down why firefox is crashing so much.

Casey Jordan casey.jordan at
Fri Nov 22 20:40:34 UTC 2013

Thanks Jesse,

I doubt that my machine is running out of memory since I have 16GB of it
and most of that is free at any given time. I will try and investigate the
other possibilities.

Where do I get this "address sanitizer build"?

Thanks again for the feedback!

On Fri, Nov 22, 2013 at 3:02 PM, Jesse Ruderman <jruderman at> wrote:

> Most of the crashes in your first block look like out-of-memory
> crashes. Many of them even have mozalloc_handle_oom in the signature.
> I thought OOM crashes didn't happen in 64-bit builds like the one
> you're using. So that's weird.  Are you somehow out of both RAM and
> swap? Is that a thing that can even happen on Mac?
> I guess it's also possible that you're hitting memory corruption
> that's being interpreted as out-of-memory. Given that you're using
> poorly-tested platform features (XSLT, XPath), it wouldn't be too
> surprising if you have stumbled on a memory corruption bug. You could
> try running an address-sanitizer build (2-3x slowdown) to find out
> whether that's the case.
> Your last crash is in the cycle collector. mccr8 in #memshrink
> ( could tell you whether the cycle collector crash is
> likely to be a result of running out of memory or a distinct bug.

Casey Jordan
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