Re: Running C++ early in shutdown without an observer

2019-06-07 Thread Kris Maglione

On Fri, Jun 07, 2019 at 11:40:05AM -0700, Chris Peterson wrote:
Note that on Android, you may never get an opportunity for a clean 
shutdown because the OS can kill your app at any time.


I don't know what is the recommendation for shutdown activities on 
Android. The GeckoView team has had some recent bugs caused by 
shutdown tasks not running (e.g. committing cached font files or 
deleting temp files). I think these tasks were moved to startup or 
scheduled to run periodically.


A lot of things really need to have flush timeouts with shutdown 
blockers for their finalizers. In JS land, we have helpers like 
DeferredTask and JSONFile for that. I don't think we really have 
anything comparable for C++.

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Re: Running C++ early in shutdown without an observer

2019-06-07 Thread David Teller
Even on Desktop, we needed to move some cleanup to startup, in case the
process was killed by the OS.

On 07/06/2019 20:40, Chris Peterson wrote:
> On 6/7/2019 9:36 AM, Kris Maglione wrote:
>> On Fri, Jun 07, 2019 at 09:18:38AM +0300, Henri Sivonen wrote:
>>> For late shutdown cleanup, we have nsLayoutStatics::Shutdown(). Do we
>>> have a similar method for running things as soon as we've decided that
>>> the application is going to shut down?
>>>
>>> (I know there are observer topics, but I'm trying to avoid having to
>>> create an observer object and to make sure that _it_ gets cleaned up
>>> properly.)
>>
>> Observers are automatically cleaned up at XPCOM shutdown, so you
>> generally don't need to worry too much about them. That said,
>> nsIAsyncShutdown is really the way to go when possible. But it
>> currently requires an unfortunate amount of boilerplate.
> 
> Note that on Android, you may never get an opportunity for a clean
> shutdown because the OS can kill your app at any time.
> 
> I don't know what is the recommendation for shutdown activities on
> Android. The GeckoView team has had some recent bugs caused by shutdown
> tasks not running (e.g. committing cached font files or deleting temp
> files). I think these tasks were moved to startup or scheduled to run
> periodically.
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Re: Running C++ early in shutdown without an observer

2019-06-07 Thread Chris Peterson

On 6/7/2019 9:36 AM, Kris Maglione wrote:

On Fri, Jun 07, 2019 at 09:18:38AM +0300, Henri Sivonen wrote:

For late shutdown cleanup, we have nsLayoutStatics::Shutdown(). Do we
have a similar method for running things as soon as we've decided that
the application is going to shut down?

(I know there are observer topics, but I'm trying to avoid having to
create an observer object and to make sure that _it_ gets cleaned up
properly.)


Observers are automatically cleaned up at XPCOM shutdown, so you 
generally don't need to worry too much about them. That said, 
nsIAsyncShutdown is really the way to go when possible. But it currently 
requires an unfortunate amount of boilerplate.


Note that on Android, you may never get an opportunity for a clean 
shutdown because the OS can kill your app at any time.


I don't know what is the recommendation for shutdown activities on 
Android. The GeckoView team has had some recent bugs caused by shutdown 
tasks not running (e.g. committing cached font files or deleting temp 
files). I think these tasks were moved to startup or scheduled to run 
periodically.

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Re: To what extent is sccache's distributed compilation usable?

2019-06-07 Thread Chris M.
I've been working through issues with distributed sccache, but I've
recently sent instructions to people currently running icecream in the SF
office on how to switch to running sccache-dist with IT managed hardware.
We're going to use that as a test bed before rolling out more widely, and
if all goes well there this should happen shortly (likely shortly after
returning from Whistler).

Regarding that bug, that's tracking IT work for the most part so probably
needs to stay restricted. Most of the work I've been doing is tracked in
sccache's github repo and can be followed there, or tracked by
https://bugzilla.mozilla.org/show_bug.cgi?id=1499145.

Chris

On Wed, Jun 5, 2019 at 1:52 AM Miko Mynttinen 
wrote:

> Has there been any progress with this? Bug 1524533 is still restricted.
>
> Miko
>
> > On Apr 2, 2019, at 10:39 PM, Jeff Muizelaar 
> wrote:
> >
> > That bug is restricted. Does it need to be?
> >
> > -Jeff
> >
> > On Tue, Apr 2, 2019 at 4:22 PM Kim Moir  wrote:
> >>
> >> The tracking bug for sccache being deployed to offices is here
> >>
> >> https://bugzilla.mozilla.org/show_bug.cgi?id=1524533
> >>
> >> Kim
> >>
> >> On Tue, Apr 2, 2019 at 3:22 AM Frederik Braun 
> wrote:
> >>
> >>> Am 01.04.19 um 22:16 schrieb Chris M.:
>  Hi Emilio, if you're interested you're encouraged to try it out,
> however
>  we're shipping machines to offices now to run the schedulers, the
> first
> >>> of
>  which I'll be testing in the SF office this week, so we're planning an
>  officially supported setup in the near future.
> 
> >>>
> >>> That's great news. Can we follow progress or detailed plans somewhere?
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Re: Running C++ early in shutdown without an observer

2019-06-07 Thread Kris Maglione

On Fri, Jun 07, 2019 at 09:18:38AM +0300, Henri Sivonen wrote:

For late shutdown cleanup, we have nsLayoutStatics::Shutdown(). Do we
have a similar method for running things as soon as we've decided that
the application is going to shut down?

(I know there are observer topics, but I'm trying to avoid having to
create an observer object and to make sure that _it_ gets cleaned up
properly.)


Observers are automatically cleaned up at XPCOM shutdown, so you 
generally don't need to worry too much about them. That said, 
nsIAsyncShutdown is really the way to go when possible. But it 
currently requires an unfortunate amount of boilerplate.

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Re: Intent to implement and ship: blob.text(), blob.arrayBuffer(), blob.stream()

2019-06-07 Thread Boris Zbarsky

On 6/7/19 8:47 AM, Andrea Marchesini wrote:

Summary: implement and ship 3 new methods to read Blob contents:
blob.text(), blob.arrayBuffer() and blob.stream().


Looks good to me.

-Boris
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Intent to implement and ship: blob.text(), blob.arrayBuffer(), blob.stream()

2019-06-07 Thread Andrea Marchesini
Summary: implement and ship 3 new methods to read Blob contents:
blob.text(), blob.arrayBuffer() and blob.stream().

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1557121

Link to standard: https://w3c.github.io/FileAPI
https://github.com/w3c/FileAPI/pull/117

Platform coverage: all.

Estimated or target release: 69

Preference behind which this will be implemented: none.

Do other browser engines implement this?
Chrome has already shipped these methods. See:
https://bugs.chromium.org/p/chromium/issues/detail?id=945893
Safari hasn't started to work on them yet. See:
https://bugs.webkit.org/show_bug.cgi?id=196258

web-platform-tests: We have existing WPTs. See:
https://github.com/web-platform-tests/wpt/blob/master/FileAPI/blob

Is this feature restricted to secure contexts? No.
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Re: Running C++ early in shutdown without an observer

2019-06-07 Thread David Teller
Have you looked at nsIAsyncShutdown?

On 07/06/2019 08:18, Henri Sivonen wrote:
> For late shutdown cleanup, we have nsLayoutStatics::Shutdown(). Do we
> have a similar method for running things as soon as we've decided that
> the application is going to shut down?
> 
> (I know there are observer topics, but I'm trying to avoid having to
> create an observer object and to make sure that _it_ gets cleaned up
> properly.)
> 
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Running C++ early in shutdown without an observer

2019-06-07 Thread Henri Sivonen
For late shutdown cleanup, we have nsLayoutStatics::Shutdown(). Do we
have a similar method for running things as soon as we've decided that
the application is going to shut down?

(I know there are observer topics, but I'm trying to avoid having to
create an observer object and to make sure that _it_ gets cleaned up
properly.)

-- 
Henri Sivonen
hsivo...@mozilla.com
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