Hot Bugs

(Important bugs for which we need to find owners or additional help. If known, please include suggested team or knowledge needed to advance the bug.)

Orange Factor

• No activity in bug 874647 (Find and fix the underlying cause of the Windows XP xpcshell hangs) since it was filed 4 weeks ago. Test suite will be disabled this week.
  • jst to follow-up with ctalbert and bmoss.
• OSX “code -20″ test failures.
  • “Code -20″ (SIGCHLD) is an IPC thing that can happen to the parent process after a child process quits

  • Currently 38 bugs on file. Under-represents occurrences as each failure is not always filed.
  • Aborts test suite.
  • If not a fatal error, can test runner not treat it as such?
    • Or automatically star & retrigger?
  • Filed bug 884471 to find and fix underlying issue.

Stability

• bug 878449 – aurora windows topcrash in CCliModalLoop::CCliModalLoop needs help (bbondy can’t reproduce)

• bug 882433 – nightly topcrash at js::ion::InlineFrameIteratorMaybeGC needs an owner

Other

The Need To Know

(Release and system issues that may impact engineering this week.)

Notices/Schedule (akeybl/lsblakk/bajaj)

• FF22b6 went to build yesterday
  • Desktop may ship today

  • [tbd] Mobile may need to respin due to bug 884300 – CFI records broken on Linux platforms
• FF22.0 RC went to build overnight
  • [tbd] Mobile may need a respin

  • No issues on the tracking list that are worrisome; please email early and often if you find something possibly critical (esp. 22 regressions)
• I’d like to hijack this section and direct your attention to “Changing our Standard for Bug Verification” on dev.planning (>80 posts, go bottom up)

51 bugs (45 bugs last week)	3 bugs (22 bugs last week)
Unresolved Aurora 23 Trackers (non-security, not tracked for Beta)	Unresolved Beta 22 Trackers (non-security)

Upcoming Outages/Upgrades

(System outages/upgrades and tree closures that impact engineering.)

Key Issues

(Non team specific issues that impact engineering.)

Team Stand-ups

(In <2 mins, what did your team accomplish last week, on what is your team working on this week, and on what, if anything, is your team blocked? No questions during the stand-ups. All questions should be asked during the roundtable.)

Accessibility (dbolter)

<Read Only>

• B2G option for installing additional extensions in DEBUG mode landed (bug 879563).

• Looking into automated tests for Gaia a11y. (Eitan + Web QA)
• Max’s recent braille improvements landed (bug 876475).
• Marco Zehe will keynote day 2 (tomorrow) at the PDF Association’s second Technical Conference.

Add-on SDK (dtownsend)

• Last week’s meeting

• Places API proposal
• Websockets support coming real soon
• Getting repacks uploaded to AMO bug 881387

B2G Services (dougt)

• Push notifications will land on desktop soon (q2 goal)
  • Will be disabled on Beta+Release until CR or interop

Developer Tools (dcamp/robcee)

<Read Only>

• Back end of Remote Inspector Landing.

• Back end for Break on DOM in Debugger landing.

DOM (jst/dougt)

• Update on the XBL Refactoring (Blake)
  • Ready to land, but waiting to land after a branch point

Firefox Desktop (gavin/dolske)

• Australis still on track to land soon (beginning of the 25 train)! Try out a UX build and file bugs!

• Firefox desktop team will be having a frontend-perf-focused work week in Toronto next week
• Status update on the new Downloads API: [1]
• dev.platform post about background tab thumbnailing: [2]

Firefox Metro (bbondy/jmathies/mbrubeck)

<Read Only>

• team status updates

• Continued work on front end polish
• improvements to chrome input selection
• progress being made on getting dev tools/profiler hooked up. (bug 850019)
• Currently hooking up Async Pan Zoom Controller to Metro in (bug 849266 and bug 801154), Desktop Wiin32 to follow

Firefox Mobile (mfinkle/blassey)

• 4 contributors, 7 bugs fixed fixed and 3 are in progress \o/: bug 867567, bug 871524, bug 877783, bug 876485, bug 684380,bug 880661, bug 802093, bug 88059, bug 879088, bug 877774

• We are getting very close to preffing WebRTC bug 881875 on for Android, looks like we need bug 882136 first, though
• Fixed and uplifted through beta: bug 879651 – no audio playback on x86
• Thank you, :tn for the fix for bug 876562 – In Fennec content behind fullscreen content should not be pannable, zoomable, or visible which was uplifted through beta. *Please* test Dynamic URL bar in Fx23 as much as you can.
• bug 882196 – Android crash in nsXPCWrappedJS::AddRef top crash (23%) landed yesterday, hasn’t made it to nightly yet

GFX (milan)

<Read Only>

• See previous week

Identity (jedp)

Ongoing:

• rtc peer connection + persona auth [rseys, jedp]

• firefoxos + persona [ozten, jedp]
• first-time sign-in to firefoxos [skinny, ozten, jedp]

GSOC Intern

• Akshay Katyal [MrDHat] working on a PiCl client for contacts data sync for firefoxos [mentor=jedp]

JS (naveed)

<Read Only>

• Compiler (JIT)
  • bug 866878: BaselineCompiler: Compile try-finally

• Garbage Collection
  • bug 877762: GC: Post-barrier cycle collector participants

• Front End and Other
  • bug 860838: Optimize asm.js FFI calls

  • MemShrink Blog post
  • Finished build/run harness for performance-cliff benchmarks

DOING

• Compiler
  • bug 881902: Last big part of interpreter stack refactoring – fallout from JM removal

• Front End and Other
  • bug 883154: Add runtime wide cache for compiled lazy scripts

  • Continue prototyping a shared memory implementation for asmjs, with the goal of running an extremely simple threaded program

Layout (jet/dbaron)

<Read Only>

• Bugs of interest that landed:
  • SVG images are no longer fuzzy when tiled and scaled (bug 600207)

  • DOM futures support landed (bug 856410) – some new CSSOM APIs depend on this
  • strongly-typed conversions between coordinate systems (bug 880676)

Media (mreavy)

• Web Audio work is mostly done, only a few bits of the API remain to be implemented.

• Ehsan has mostly moved away from the Web Audio work, padenot, rillian, karlt and others are helping to finish the rest of the project.
• Basic WebVTT support landed behind a pref. You can test <track> in Nightly now!
• Created WebVTT wiki page for status and getting-started links.
• This week the WebVTT team is working on adding tests, fixing nits, and planning implementation of the revised WebVTTCue API.
• MediaEncoder interface landed and confirmed to be recording Opus files (Bug 868962). Bug 879688 tracks all the MediaEncoder work.
• Identified a major cause of growing audio latency in WebRTC (including B2G) on some machines (but not others); working on a solution in bug 884365
• Temporarily running WebRTC as root on B2G (until E10S changes land) causes performance issues (thread-priority and switching).
• Planning to land major update of WebRTC.org import as soon as 25 opens; already tested on Desktop and B2G. bug 880879

Necko (dougt/jduell)

• bug 497003: Off-main thread OnDataDelivery patch bounced: working on fix
  • doesn’t work if content is gzipped: that will be follow-up. Also followups to support XHR workers, Download manager, imglib
• bug 784575, bug 871452: Starting work to allow network traffic to be measured (and choked off to wifi-only) on a per-app basis.
• bug 881804: Adding interface for speculatively doing DNS and/or prewarming TCP connections based on previous history. In API/design phase.
• New cache code: integrating & debugging initial API and filesystem patches

Performance (vladan)

• bug 853388: Add-on manager refactor will tentatively land next week

• bug 863475: Integrated ARM EXIDX stack unwinding into Breakpad
• bug 867762: Patch to track all main-thread I/O in profiler has landed. To try it out:
  • 1. Stop the profiler

  • 2. Make sure that “Main Thread I/O” is checked in the profiler pop-out panel
  • 3. Start the profiler
  • Sample screenshot
• Telemetry server backend redesign:
  • Overview of the work

  • telemetry-server github repo
  • new Telemetry data storage format
• bug 813742: Work continues on improving reftest and crashtest suites
• bug 883253: Investigating potential benefits of using new “volatile ranges” kernel feature on B2G/Android
• bug 848358: Work continues on Talos regression teststar for tab animation smoothness
• bug 865389: Adding file “read-ahead” flags to OS.File

• Aaron Klotz: Detecting Main Thread I/O with SPS

• Irving Reid: Add-on Manager progress: Almost done!

Seceng (mmc)

• Team workweek this week in MV Bridge (Mon-Wed) and SF (Thur). Drop by and say hi!

• Sandboxing planning for Q3 going on as we speak (DRI: imelven)
• Please come: Web Security 1.0 training at 12:15 in MTV 10 Forward (DRI: tvyas, rforbes)
  • https://air.mozilla.org/web-security-training/

WebAPI (overholt)

<Read Only>

Last week:

• patches for IDB temporary storage up for review

• continued work on Promises
• W3C AC meeting
• spec work: Telephony, Fetch, Promises, icons-in-manifests
• WebAPI documentation review

This week:

• get up to speed with NavigationController

• more work on DataStore API
• review of sync IDB patches
• spec work: Telephony, Fetch, Promises, Keyboard API

Quality Programs

(An opportunity to hear about status with the various quality programs that do not have a formal team structure.)

Memshrink (njn)

A big week.

• Brian Hackett enabled lazy bytecode. This avoids generating bytecode (and subsequent objects, shapes and strings) for unexecuted JS functions, which in practice is ~50% of them due to websites’ extensive use of libraries such as jQuery. Reduces Firefox’s memory consumption by ~5% on common workloads, and significantly reduces pressure on the GC.

• Nils Maier implemented separate measurement of add-on compartments in about:memory. This doesn’t catch all add-on memory consumption, but it gets a lot of it, especially for JetPack add-ons. People have been wanting this for *years*.

• The report on MemShrink’s 2nd birthday includes an updated MemShrink “big ticket items” list. Three old items were crossed off, and three new ones added. Better image handling and generational GC are still #1 and #2, though both have made good progress.

• MemShrink progress report, week 103-104. Future progress reports will now be every four weeks, rather than every two weeks.

• Android-style zygote process forking is coming along nicely, currently being reviewed.

OrangeFactor (ryanvm)

• Past week’s OrangeFactor: 6.36 (Previous Week: 4.10).
  • Most contributors to the spike have been fixed or backed out already.
• 15 intermittent failures fixed in the last week – List – Thanks!.

Stability (kairo/bsmedberg)

• Stability numbers continue to look good.

• Trunk saw a number of new crashes in the last days, mostly fixed by now, see yesterday’s stability meeting.
• bug 884300 is an issue that gives us bogus stacks on Linux, including Android, at least on 22 and higher. If you looked at crash stacks recently, be aware of that and re-check once this is fixed.

Roundtable

(Comments and questions that arise during the course of the meeting or otherwise do not have a section.)

• Lots of big landings planned for “right after Firefox 24 branches”
  • XBL refactor, download API, Australis, “major update of WebRTC.org import”
    • download API is already landed and is being developed in parallel to the existing code, so there’s no imminent “big landing” [gavin]
  • Can we land these a day apart so each one gets its own Nightly? (For more useful regression ranges, and avoiding pileups that decrease Nightly testing)
• [akeybl] FFOS 1.2 is targeting Gecko 27ish. Have we looked at WebRTC, gUM, audio recording, etc. on a device? Or should we plan to disable and place on the product roadmap?

<Read only beyond this point>

Mailing List Threads

(Threads that are likely to be of interest to engineering from various mailing lists.)

• “Changing our Standard for Bug Verification” on dev.planning (>80 posts, go bottom up)

Good Reads

(Links to blog posts, books, videos, etc. that you think will be of interest to others.)

---

Hot Bugs

(Important bugs for which we need to find owners or additional help. If known, please include suggested team or knowledge needed to advance the bug.)

Orange Factor

• bug 861700 (Intermittent browser_705597.js,browser_707862.js | uncaught exception – [object Event] at undefined:undefined) is #1 top orange and unowned.
  • Affects OSX and Windows.

  • Possible regression from bug 845681.

Stability

• bug 853959 (DrawingContext::DrawBitmap) is an unowned Canvas2D crash that turned into a topcrash across channels apparently due to Apple’s iOS7 page.
  • We should try to get on this before more similar pages appear with an even higher profile.
• bug 880842 (mozilla::gfx::DrawTargetCG::DrawSurface) is a new unowned trunk topcrash, but the GFX team seems to be on it and have a good suspect for the patch causing it.

Other

The Need To Know

(Release and system issues that may impact engineering this week.)

Notices/Schedule (akeybl/lsblakk/bajaj)

• FF22b5 will be going to build today/tomorrow, released before the end of the week
  • x86 Android audio fix

  • Fix for the #1 top Mac crasher
• Only two weeks away from release! Speak now or forever hold your peace :)

• A note on Radeon driver issues, and preventing the loss of .5 million users

45 bugs (47 bugs last week)	22 bugs (30 bugs last week)
Unresolved Aurora 23 Trackers (non-security, not tracked for Beta)	Unresolved Beta 22 Trackers (non-security)

Upcoming Outages/Upgrades

(System outages/upgrades and tree closures that impact engineering.)

Key Issues

(Non team specific issues that impact engineering.)

Mike Hoye notes that UCOSP – the Undergraduate Capstone Open Source Project class, a distributed-team last-year project – is moving along, and we have three great submissions for projects so far. If you have other projects that would be suitable for a team of smart kids to work on for a few months in the fall, or any questions, send two or three paragraphs describing them to Mike Hoye at mhoye@mozilla.com.

Git

Quick poke on jst’s Embracing git usage for Firefox/Gecko development? thread. If you have thoughts on this subject, please respond this week.

What are the most important problems for the web?

If you have thoughts, contact Anne van Kesteren (annevk) or Andrew Overholt (overholt) on IRC or via email.

Team Stand-ups

(In <2 mins, what did your team accomplish last week, on what is your team working on this week, and on what, if anything, is your team blocked? No questions during the stand-ups. All questions should be asked during the roundtable.)

Accessibility (dbolter)

• B2G – Add option for installing additional extensions in DEBUG mode – Patch on. bug 879563

• Fixed a pesky assertion related accessible cache (children of a parent removed from the DOM).
• Reduced braille verbosity to match user expectations.
• Accessible text fixes marching along with positive vendor feedback.

Add-on SDK (dtownsend)

• Last weeks meeting notes

• Emails about add-on repacks have been sent out
• Work on connecting the SDK console to the new browser console
• Heads down on UI components

B2G Services (dougt)

• Love some feedback/help on front end work of whereismyfox
  • https://github.com/dougt/whereismyfox
• Enabling push notifications for B2G 1.1 across the board
  • Same servers are going to support android+desktop

Developer Tools (dcamp)

• Meeting Notes

• Discussing the separation of REPL and Logging in the web console here.
• Black-boxing sources in the debugger: discussion, bug 877682
• Remote inspector/b2g content processes progressing

DOM (jst/dougt)

• Promises/Futures and API design

• XBL refactor (bug 653881). Note that this might cause regressions, we are going to land early and stay on top of incoming bugs.

Firefox Desktop (gavin/dolske)

<Read Only>

• Australis still on track to land in about 2 weeks (beginning of the 25 train). Try out a UX build and file bugs!

• URL autocomplete fix: death to www.pastebin.mozilla.org (bug 769348)
• New tab preloading landed (with wins to tab animation smoothness and newtab load time), but will need to be reverted to investigate talos regressions (bug 791670)

Firefox Metro (bbondy/jmathies/mbrubeck)

• Returning intern jwilde starts this week.

• mochitest-browser-chrome now running in automation; will be visible on TBPL once remaining oranges are fixed (bug 880298).
• Basic support for scrollbars landed; we would like to move to “hovering” scrollbars like on OS X that appear when using a mouse without requiring a reflow (bug 881081).
• Working on some lightweight mochitest-browser-chrome performance tests (bug 859155).
• About to start implementation of new download UI (bug 801136).

Firefox Mobile (mfinkle/blassey)

• Cleanup for and documentation added to bug 877728 – Add pixel units to android/widget JNI code uses of gfx::Point, gfx::Rect

• WebRTC + permissions have been removed from Firefox 23 bug 879335
• Fix audio problem for Android x86 (bug 879651)
• We also backed out Contacts API for Android permission request until main code lands bug 857730
• Good gUM video playback fixes landed: bug 874546, bug 874572
• May Perf Checkup
  • Tracking the following as a result: bug 877779, bug 879357, bug 877812
• bug 876562 – In Fennec content behind fullscreen content should not be pannable, zoomable, or visible
  • has reduced test case

  • options are: messy backout, hail mary fix, rel note
• bug 880259 Firefox should use GeckoView
  • plan to land for Fx25 immediately after the merge

GFX (milan)

• New GFX intern, Guillaume Abade started last week

• Rendering biweekly meeting alternating between 2:30pm PST and 5:30pm PST to allow easier Taipei participation
• A number of (unrelated?) regressions in Nvidia’s 3D Vision, H.264, images, Silverlight
• Key items in progress:
  • SkiaGL

  • Moz2D core graphics (Azure Quartz)
  • OMT image animation
  • APZC
• Will have some participation in the upcoming Desktop work week

Identity (jedp)

<Read Only>

• Last Week:
  • Fri-Sun work weekend in Portland (Austin, Jed, Crystal)

• Main efforts this Week:
  • Persona in RTC peer connection auth (Ryan at RTC work week, Jed)

  • Sign-in-to-web in desktop browser, esp. UI issues (Austin)
  • Persona sign-in UX for b2g FTE (Jed, Crystal, et al.)

JS (naveed)

Established Benjamin’s Weekly Status site for JavaScript Engine work in progress. Feel free to follow along.

DONE

• Compiler (JIT)
  • bug 859609: Enable inlining of heavyweight functions as well as anonymous lambda clones

• Garbage Collection
  • bug 861925: Handle ArrayBuffers that are both shared and Transferable

  • Added B2G-specific analysis to catch rooting hazards in code not compiled for the desktop browser

• Front End and Other

• Compiler (JIT)
  • bug 866878: Add try-finally support to baseline compiler

  • bug 875720: Sunspider regression from bug 875276 – under review

• Garbage Collection
  • bug 877762: Working on post barriering GC thing pointers on browser heap

  • Get exact rooting green in the browser

• Front End and Other
  • bug 853301: Reenabling JS Intl API in desktop builds

  • bug 880538: Avoid asm.js parse node memory spike
  • Compartment isolation for off thread JS parsing, object serialization/deserialization.

Layout (jet/dbaron)

• CSS Working Group met last week in Tokyo, followed by Test the Web Forward Event
  • CSS Working Group agreed on two hard issues needed to advance CSS Transitions
• pango text shaping code has been removed since we’ve been using harfbuzz for a while (bug 810252)
• Servo CSS work started: selector matching
• New Intern: Cory Ford starts next week (will sit next to jet and cpeterson in SF)

Media (mreavy/kentuckyfriedtakahe)

• Video with HE-AAC audio is now working on Windows 7/8.

• First implementation of WebRTC on Desktop is going out in Firefox 22
• WebRTC is at a work week this week in Sunnyvale (just down the road from the MV office). Details are here: https://wiki.mozilla.org/Media/WebRTC/WebRTC_workweek_20130610
• During the work week, we plan to update the core WebRTC libraries on Nightly to the latest stable branch. The bug to follow for this is Bug 880879. If you notice any regressions after the update, please let Randell (jesup on irc) know.
• Web Audio has been landing in Firefox. For the latest status on Web Audio, follow the tracking bug: Bug 779297 and check out: https://wiki.mozilla.org/WebAudio_API_Rollout_Status.
  • NOTE: We have a new bugzilla component: “Web Audio” under Core. Please file new Web Audio bugs there.

Necko (dougt/jduell)

• Off main thread delivery for OnDataAvailable (bug 497003) coming very soon.
  • first client is HTML parser, then imglib
• Cache rewrite: still early, but starting to integrate and test new API and file system layers

Performance (vladan)

• Mark Reid has joined the Perf team. He will be working on the Telemetry backend reboot

• bug 867757, bug 867762: Extending Gecko Profiler to support arbitrary annotations
• bug 881578, bug 881575, bug 879957: A few small improvements to reduce startup I/O
  • bug 880296: We need to load fewer DLLs on startup
• Starting Android startup investigation
• bug 872421, bug 880664: Landed a module loader for chrome workers
• bug 853388: Working on converting Addon Manager storage from SQLite to JSON, and moving its I/O off the main thread
• bug 813742: Parallelizing the reftest and crashtest suites
• bug 748598?: Dhaval will be working on storing Firefox caches in volatile (purgeable) memory on Android & B2G

WebAPI (overholt)

Last week:

• Implemented promises (as “future”; will rename) (bug 856410)
  • still need to figure out how to land due to spec churn
• Implemented SharedWorkers (bug 643325) (awaiting review)
• Regular spec work (SysApps, Promises, Fetch)
• Got a lot closer to final patch for temporary storage (IDB first)

This week:

• Get temporary storage patch(es) up for review

• Promise followups
• SharedWorkers followups
• W3C AC meeting in Tokyo

Homework:

• “What are the most important problems for the web?”

Plugins And Data (bsmedberg)

• Finishing up the new doorhanger for click-to-play plugins, details in firefox-dev

• Finishing up data collection for latency of IPC messages and hooking that into the profiler to analyze plugin slowness

Next:

• Investigating orphan FHR reports

Quality Programs

(An opportunity to hear about status with the various quality programs that do not have a formal team structure.)

Critsmash (dbolter)

• Last report showed good risk factor decrease. Yay!

Memshrink (njn)

• Meets today at 4PM PDT

OrangeFactor (ryanvm)

• Past week’s OrangeFactor: 4.1 (Previous Week: 5.90).

• 17 intermittent failures fixed in the last week – List – Thanks!.

Stability (kairo/bsmedberg)

• Stability numbers look good overall.

• Trunk has high crash rates due to bug 880842 (see Hot Bugs) and bug 881266 (fixed by bug 877584 backout for now).

Roundtable

(Comments and questions that arise during the course of the meeting or otherwise do not have a section.)

<Read only beyond this point>

Mailing List Threads

(Threads that are likely to be of interest to engineering from various mailing lists.)

• dev-platform
  • Proposal for power metering per application framework on FFOS (vchang)

  • Fix or disable windows desktop b2g builds (catlee)
• firefox-dev
  • Plugin doorhanger progress and review/landing plan (bsmedberg)

Good Reads

(Links to blog posts, books, videos, etc. that you think will be of interest to others.)

• Lawrence Mandel: Mozilla Engineering/Platform Meeting Reboot

---