725699 - clean up telemetry hashtable reflection

Status: RESOLVED FIXED

(Toolkit :: Telemetry, defect)

Description

[Nathan Froyd [:froydnj]]

We have a very common:

construct a JSObject O
iterate over hashtable to define properties on O
check for failure
return O

pattern in Telemetry.  And it's only going to get more common with bug 715927 and related bugs.  Let's split this out into common code.

Comment 1

[Nathan Froyd [:froydnj]]

Attachment: patch

This is a much-cut-down version of the patch in bug 715927: no addon histograms, no persistent telemetry bits.  IMHO, it's much easier to do this here and then make those patches use it.

Comment 2

[Nathan Froyd [:froydnj]]

Attachment: patch

Second iteration, with AutoHashtable as discussed on IRC.

Comment 3

[(dormant account)]

Comment on attachment 595837 [details] [diff] [review]
patch

+  // This gets marked immutable in debug builds, so we can't use
+  // AutoHashtable here.
   nsTHashtable<nsCStringHashKey> mTrackedDBs;

Seems like we shouldn't be using a nsTHashtable for that either. Could probably just keep a list of hashes precompiled at compile-time with some template magic. Where is a perfect-hash lib when you need one :(

Comment 4

[Mozilla RelEng Bot]

Autoland Patchset:
	Patches: 595837
	Branch: mozilla-central => try
Error applying patch 595837 to mozilla-central.
patching file toolkit/components/telemetry/Telemetry.cpp
Hunk #3 FAILED at 396
1 out of 5 hunks FAILED -- saving rejects to file toolkit/components/telemetry/Telemetry.cpp.rej
abort: patch failed to apply

Could not apply and push patchset:

Comment 5

[Nathan Froyd [:froydnj]]

Attachment: patch

Rebasing to something that applies cleanly to m-c.

Comment 6

[Mozilla RelEng Bot]

Autoland Patchset:
	Patches: 596165
	Branch: mozilla-central => try
	Destination: http://hg.mozilla.org/try/rev/b5be9d37da7e
Try run started, revision b5be9d37da7e. To cancel or monitor the job, see: https://tbpl.mozilla.org/?tree=Try&rev=b5be9d37da7e

Comment 7

[Mozilla RelEng Bot]

Try run for b5be9d37da7e is complete.
Detailed breakdown of the results available here:
    https://tbpl.mozilla.org/?tree=Try&rev=b5be9d37da7e
Results (out of 209 total builds):
    exception: 4
    success: 171
    warnings: 20
    failure: 14
Builds (or logs if builds failed) available at:
http://ftp.mozilla.org/pub/mozilla.org/firefox/try-builds/[e-mail]-b5be9d37da7e

Comment 8

[Vladan Djeric (:vladan)]

Comment on attachment 596165 [details] [diff] [review]
patch

https://hg.mozilla.org/integration/mozilla-inbound/rev/108f5491cf3f

Comment 9

[Marco Bonardo [:mak]]

https://hg.mozilla.org/mozilla-central/rev/108f5491cf3f