[deploy preview] Export a tool to extract gecko logs from a profile

[julienw]

deploy preview

Open the Web console, enter extractGeckoLog(). After a while it should download automatically a txt file with the content of all logs. Note it doesn't take into account the range for now.

It is slow because running inside the web console runs the code only in the JS interpreter and never starts the JIT.

Fixes #4660

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.44%. Comparing base (1507cdd) to head (a457ad3). Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4973      +/-   ##
==========================================
+ Coverage   88.43%   88.44%   +0.01%     
==========================================
  Files         304      304              
  Lines       27581    27607      +26     
  Branches     7458     7465       +7     
==========================================
+ Hits        24390    24416      +26     
  Misses       2963     2963              
  Partials      228      228              

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[acreskeyMoz]

Hey @julienw -- this seems to work very well for me!

I've asked the necko folks to add feedback as well.

• The output didn't seem to be recognized by logan -- there might be a small export change required (this is a guess) Current export: [Parent Process 158395 Socket Thread] D/nsSocketTransport engaging But when I capture MOZ_LOG's natively: [Parent 87530: Socket Thread]: D/nsSocketTransport engaging

• Naturally a button or similar would be better than console commands :) • I didn't find the performance to be a problem at all.

[KershawChang]

I've looked at the output log and it looks great! Thank you.

[julienw]

Thanks all, I made the requested changes and added a test! I also tested after the changes that logan would be able to import the resulting file.

This should now be ready for review :-)

[acreskeyMoz]

Used this again today, very nice ;)