Low Level Tools/Status2018Q4

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Status updates for the week of 2018/12/24

Nick

Dec 17--21: Four day week due to PTO.

rustc landings:

Status updates for the week of 2018/12/17

Nick

Dec 10--14

rustc landings:

Status updates for the week of 2018/12/10

Tom

Nick

Dec 03--07

  • Orlando All Hands

Status updates for the week of 2018/12/03

Nick

Nov 26--30

rustc landings:

Status updates for the week of 2018/11/26

Nick

Nov 19--23

Firefox landings:

rustc landings:

Other:

  • More progress on new DMD viewer.

Gabriele

  • I triaged November 17th's nightlies, filed bug 1508212 - Crash in java.lang.NullPointerException: at android.view.ViewRootImpl.performDraw(ViewRootImpl.java), bug 1508216 - Crash in java.lang.IllegalArgumentException: at org.mozilla.gecko.sync.Utils.throwIfNull(Utils.java), bug 1508221 - Crash in _chkstk | CreateNotificationBlock and added two signatures to bug 1479795 - Crash in igd10iumd64.dll with Intel driver 23.20.16.4973
  • I closed a bunch of old bugs to clean up some of my components: bug 1091975 - Android NDK r10c failure building breakpad: error: 'ElfELFSIZE_Addr' does not name a type, bug 1119569 - We should assert/crash if CGROUPS is not enabled in the kernel, bug 1362203 - Crash in AsyncShutdownTimeout | profile-before-change | Crash reporter: blocking on minidump analysis
  • I prepared a patch to figure out what executable we're stuck on in bug 1386760
  • I prepared a patch to block the Facebook Uploader plugin from loading on Mac in bug 1502977. I regressed this when I refactored the crash annotations
  • I wrote a patch to diagnose the timing difference described in bug 1505944 but the results were inconclusive
  • I filed and investigated bug 1508215 which is about graphics adapter names showing up in weird ways on Socorro
  • I filed bug 1508265 - Re-enable getting minidumps of hung content processes on shutdown, and bug 1509298 - Add tests to ensure that FallbackEncoding picks up locale changes correctly as follow ups to work I did last week and a number of bugs regarding crash reporting issues: bug 1509032 - The pingsender leaves behind zombie processes on Linux, bug 1508267 - Crash reports that have not been submitted are not deleted on Android, bug 1509030 - The X11 widget does not populate the graphics adapter annotations
  • I landed a patch to fix bug 1500026 - The FallbackEncoding instance is not listening to the "intl:requested-locales-changed" event

Status updates for the week of 2018/11/19

Nick

Nov 12--16

rustc landings:

Other:

  • Good progress on new DMD viewer.

Status updates for the week of 2018/11/12

Nick

Nov 05--09

Four day week due to a public holiday.

rustc landings:

Other:

  • Blogged about my Rust NLL improvements.

Status updates for the week of 2018/11/05

Nick

Oct 29--Nov 02

rustc landings:

Other

  • Finished first draft of DHAT overhaul. I've been using it on rustc, it's nice!

Status updates for the week of 2018/10/29

Nick

Oct 22--26

rustc landings

Valgrind landings

Other

  • Lots more DHAT overhaul progress. (The above rustc improvements were found with it.)

Status updates for the week of 2018/10/22

Nick

Oct 15--19

Firefox landings:

Other:

  • Lots more progress on a new data viewer for DHAT. I started using it in earnest on rustc.

Status updates for the week of 2018/10/15

Gabriele

  • I triaged October 6th's nightlies and filed bug 1497143 - Crash in java.lang.IllegalStateException: at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java), bug 1497145 - Crash in java.lang.OutOfMemoryError: at android.database.CursorWindow.nativeGetString(Native Method), bug 1497148 - Crash in java.lang.IllegalArgumentException: at org.mozilla.gecko.GeckoProfile.<init>(GeckoProfile.java), bug 1497149 with two distinct signatures - Crash in OOM | large | NS_ABORT_OOM | nsTArray_base<T>::EnsureCapacity<T> | mozilla::dom::HTMLMediaElement::DispatchAsyncEvent
  • I updated and landed the fix for bug 1390547, now multi-line MozCrashReason annotations are properly handled both in Rust and C++
  • I wrote a fix for bug 1497692 which lowers the priority of the minidump-analyzer tool after a crash. The goal is to let the user go back to what it was doing ASAP
  • I prepared a patch for bug 1498609 which will tell us which of our users are using ECC memory and which are not. I also prepared a data review request since this is new data we didn't collect before
  • I've spent some time gathering information on how to implement crash pings for GeckoView in bug 1483331. I've got a plan almost ready for that
  • I've further worked on bug 1435683, integrating the new prototype service with the XPCOM machinery and finishing the script that generates the list of topics

Nick

Oct 08--12

Firefox landings:

rustc-perf landings:

Valgrind landings:

Other:

  • Blogged about static atoms.
  • Lots of progress on a new data viewer for DHAT.

Status updates for the week of 2018/10/08

Gabriele

  • I've triaged September 29th's nightlies and filed bug 1495589 - Crash in js::GCMarker::traverse<T> and bug 1495449 - Crash in mozilla::recordreplay::child::ReportFatalError | mozilla::recordreplay::Stream::CheckInput
  • I prepared a patch for bug 1390547 which should fix rust panic reports with multi-line messages
  • I uplifted the patch for bug 1463048 which fixes a long-standing shutdown crash caused by asynchronous minidump generation
  • I closed bug 1485260 because it wasn't a regression, the change in the bug just made our tools finally see all the symbols present in Linux PGO builds
  • I fixed bug 1494203, an issue with highlighting a page title in Fennec's awesomebar which I had introduced while fixing bug 1127855
  • I uplifted both bug 1127855 and bug 1494203 to beta
  • I've finally started working on bug 1435683 having laid out a basic IDL for the new observer service and possibly found a partial solution for dealing with artifact builds

Nick

Oct 01--05

Firefox landings:

rustc-perf landings:

Status updates for the week of 2018/10/01

Gabriele

  • I've triaged September 22nd's nightlies and filed far too many bugs: bug 1493590 - Crash in mozilla::layers::GPUVideoImage::GetAsSourceSurface, bug 1493591 - Crash in mozilla::dom::WorkerPrivate::~WorkerPrivate, bug 1493593 - Crash in avx::memset32, bug 1493607 - Crash in java.lang.UnsatisfiedLinkError: dlopen failed: library "/data/data/org.mozilla.fennec_aurora/lib/libmozglue.so" not found at java.lang.Runtime.load0(Runtime.java), bug 1493611 Crash in aom_lpf_vertical_4_neon, bug 1493630 Crash in std::panicking::rust_panic_with_hook, bug 1493633 - Crash in mozilla::gfx::PVRGPUChild::SendStartVRService, bug 1493635 - Crash in libhwui.so@0x86de6, I've also added a signature to bug 1461267
  • I've added a signature to bug 1127855 and ended up investigating the bug, I ultimately traced it down to the fact that the lowercase version of a string might have a different number of characters than the original mixed-case - at least in some languages. I wrote a patch to fix it but...
  • My fix introduced a new one, bug 1494203. I've already prepared a fix but it's still undergoing review.
  • I've investigated the shutdown crash in bug 1488091 and I have the feeling that it's related to how we write out preferences during shutdown. Unfortunately it's not easy to be certain and it might not even be our fault.
  • While working on my observer refactoring I started getting an assertion when starting my nightly build, I ultimately traced it down to the preferences code using floating-point/string conversions in a locale-dependent way. I fixed the issue by making all the conversions locale-independent.
  • I finally landed bug 1490240 which removes all remaining warnings in the first-party crash reporting code and quite a few in mozglue too.
  • I've reviewed a patch in bug 1493227, a workaround for a horrible issue with the Oculus Mobile runtime.

Nick

A four day week due to a public holiday.

Firefox landings:

rustc landings:

rustc-perf landings:

Status updates for the week of 2018/09/24

Nick

rustc landings:

Gabriele

  • I triaged September 15th's nightlies and filed bug 1491761 - Crash in js::CloneRegExpObject
  • I reviewed bug 1388134 which lazifies reading application directories in the crash manager
  • I've finished and landed the patch for bug 1463048 which strips out asynchronous minidump generation as it proved unstable and hard to fix
  • I closed four bugs that had become invalid or were fixed by the removal of the disk space wather: bug 1328321, bug 1206074, bug 876850 and bug 863596
  • I've landed bug 1490240 which removes all the remaining warnings from the crash reporter code (and some from mozglue too) when building under Windows with clang-cl, unfortunately the patch was backed out for breaking some mozglue code
  • I've filed and fixed bug 1492815 which ensures that Fennec and GeckoView do not send the 'StackTraces' field when submitting a crash report. This field is large and redundant as it's being used only for generating crash pings
  • I've investigated some intermittent failures in bug 1376773 which tests crash detection in marionette but couldn't fix the issue yet
  • I landed a fix for bug 1470223 which will improve the quality of the stack-traces printed out in the logs for try runs
  • I've prepared a fix for bug 1493365 which was a gtest failure triggered by bug 1470223. It was a hard one to figure out because it was indirectly caused by the increase in memory consumption caused by the latter

Status updates for the week of 2018/09/17

Nick

Firefox landings

rustc landings

Other

  • Booked Orlando flights.
  • Did my first review as a newly-minted rustc reviewer.

Gabriele

  • I’ve reviewed the patch for bug 1430041 which adds support for the socket process to the crash reporting code

Tom

  • Pinged nrc about rustup review
  • Down the rabbit hole of debugging a failing i586 musl build via travis
  • Went to a “rust office hours” to give a gdb lesson; took notes, may write a short tutorial

Status updates for the week of 2018/09/10

Tom

Gabriele

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