559255 - Link to breakpad symbols used to process minidumps

Status: RESOLVED WONTFIX

(Socorro :: General, task)

Description

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

I worked on a bug today in which libflashplayer.so prevented the crash-stats minidump_stackwalker from showing me enough frames in a hang-dump backtrace.  I have a locally-modified minidump_stackwalk that scans the stack more aggressively, and I wanted to use that on the dump.  Problem was it me quite a while to find out how to get the linux symbols.  It would have been great if there had been a link on the crash-stats page to the symbol server URL from which the symbols were downloaded.  (Or to a crash-stats-hosted file if symbols are gathered from another source.)  Seems to make sense for the link to only be available to authorized users.

This might useful for mac too, I dunno.

Comment 1

[Benjamin Smedberg]

I really don't think we need link exposed in the UI for this case. Do you know how the symbol server is structured? It's basically:

http://symbols.mozilla.org/firefox/foo.so/debugid/foo.so.sym

So for this example report:
https://crash-stats.mozilla.com/report/index/93ae760e-3e3b-4608-9452-9a3242100412

Look in the "modules" tab, see that the debugid for libxul.so is "BBA3B2A81930FCAACCEE53E210A3B6400". And construct the URL:

http://symbols.mozilla.org/firefox/libxul.so/BBA3B2A81930FCAACCEE53E210A3B6400/libxul.so.sym

You should be able to construct a simple python script which pulls these down, given a crash-report page. You can use Ted's fetch-symbols.py as a starting point if necessary: http://people.mozilla.com/~tmielczarek/fetch-symbols.py

The JSON version might be more easily processable: http://crash-stats.mozilla.com/dumps/93ae760e-3e3b-4608-9452-9a3242100412.jsonz

Comment 2

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

I would be settle for something ever so simple like

  <a href="...">Minidump.dmp</a>
  <a href="http://symbols.mozilla.org/firefox/bleep-blorp-symbols.txt">Symbol index</a>

Then I could copy the link, pass it to Ted's script, and be off to the races.  I understand that this might be an odd place to stick this info, and I'd welcome suggestions for better places.  IMHO having this next to a minidump link would be very useful.

(I tried to update MDC yesterday with instructions for constructing the bleep-blorp part, but it ate my edit.)

Comment 3

[Benjamin Smedberg]

Attachment: bookmarklet

This bookmarklet will create links on the crash-stats page modules tab, if that helps.

Comment 4

[(not currently active) Ted Mielczarek]

Socorro doesn't really know this information, FWIW, it treats Breakpad's minidump_stackwalk as a black box that takes a minidump + a bunch of directories containing symbols, and returns a stack trace.

Comment 5

[(not currently active) Ted Mielczarek]

Also, as bsmedberg says, all the info that fetch-symbols.py needs should be available on the crash report page.

Comment 6

[Robert Kaiser]

Is there anything that is to be or can be done in this bug? For me, this sounds like either something not intended to be done or something not easy to do, but it's not even clear for me what the actual request here is...

Comment 7

[(not currently active) Ted Mielczarek]

Yeah, I don't think this is worth fixing as filed.