Uploading symbols from try builds

[Ted Mielczarek]

Hello,

I landed some patches yesterday[1] that have now merged to m-c to allow uploading symbols from try builds to the symbol server. Previously if you wanted to debug a try server build it involved a bunch of annoying manual steps, but now you can simply ask for symbol upload tasks to run and then use the symbol server almost exactly like you would with a nightly or release build.

Symbol upload isn't enabled by default (since I expect most people are unlikely to need it), but there are two ways to enable it:
1) Run `mach try fuzzy --full` and select the `${build}-upload-symbols` tasks that correspond to the builds you're requesting. These tasks won't show up without `--full`, FYI.
2) After pushing to try, use Treeherder's "Add new jobs" tool (available from the menu under the little triangle on the top right) and add the `Sym` jobs corresponding to the builds you requested.

To debug the resulting build you will need to use a slightly different URL for the symbol server: https://symbols.mozilla.org/try . You can otherwise follow the symbol server instructions[2]. Try symbols are stored separately from builds we ship to avoid any contamination as well as to have a shorter retention period (28 days, matching the Taskcluster artifact expiration for try). This won't currently work with my GDB symbol server script[3] because it has a hardcoded symbol server URL, but you can of course edit the script to fix that.

I'll update the symbol server docs soon.

-Ted

1. https://bugzilla.mozilla.org/show_bug.cgi?id=1437577
2. https://developer.mozilla.org/en-US/docs/Mozilla/Using_the_Mozilla_symbol_server
3. https://gist.github.com/luser/193572147c401c8a965c

[Aaron Klotz]

This is awesome, Ted, THANK YOU! \o/

-Aaron

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[pbeng...@mozilla.com]

On Tuesday, May 8, 2018 at 1:38:26 PM UTC-4, Ted Mielczarek wrote:
> To debug the resulting build you will need to use a slightly different URL for the symbol server: https://symbols.mozilla.org/try . You can otherwise follow the symbol server instructions[2]. Try symbols are stored separately from builds we ship to avoid any contamination as well as to have a shorter retention period (28 days, matching the Taskcluster artifact expiration for try). This won't currently work with my GDB symbol server script[3] because it has a hardcoded symbol server URL, but you can of course edit the script to fix that.
>

The symbols are downloaded in one of two ways actually. By adding the /try/ prefix as Ted shown. Or by adding "?try" to the URL.
See http://tecken.readthedocs.io/en/latest/download.html#try-builds

Markus Stange filed https://bugzilla.mozilla.org/show_bug.cgi?id=1460306 for having Try build symbols also available in symbolication.