Bug 95128

Summary: Crash during slide transition preview
Product: LibreOffice Reporter: Yousuf Philips (jay) (retired) <philipz85>
Component: ImpressAssignee: Caolán McNamara <caolan.mcnamara>
Status: RESOLVED FIXED    
Severity: major CC: caolan.mcnamara, kendy, michael.meeks, michael.stahl, quikee, raal, serval2412, thb
Priority: high Keywords: bibisected, haveBacktrace, regression
Version: 5.1.0.0.alpha0+ Master   
Hardware: All   
OS: All   
Whiteboard:
Crash report or crash signature: Regression By:
Bug Depends on:    
Bug Blocks: 103542, 103704    
Attachments: bt with debug symbols
trace.

Description Yousuf Philips (jay) (retired) 2015-10-17 09:46:57 UTC 
Steps:
1) Open Impress
2) Draw a square
3) Create new slide
4) Draw a circle
5) Click slide transitions tab in sidebar
6) Select fade smoothly
7) During the preview, click on slide 1
8) Crash

Version: 5.1.0.0.alpha1+
Build ID: b684090d4f573eb339e93872d0cef07e69adc913
TinderBox: Linux-rpm_deb-x86_64@70-TDF, Branch:master, Time: 2015-10-16_01:50:06
Locale: en-US (en_US.UTF-8)

Regression as this doesnt happen in 5.0 daily.

Version: 5.0.3.0.0+
Build ID: fb38840771bc4c58de9bd62b960d0f2154fac394
TinderBox: Linux-rpm_deb-x86_64@46-TDF, Branch:libreoffice-5-0, Time: 2015-10-07_08:03:22
Locale: en-US (en_US.UTF-8)
Comment 1 Julien Nabet 2015-10-17 12:32:04 UTC 
Created attachment 119698 [details]
bt with debug symbols

On pc Debian x86-64 with master sources updated today, I could reproduce this.
Comment 2 Julien Nabet 2015-10-17 12:33:05 UTC 
I increase importance since:
1) it's a regression
2) it's a crash
3) it's not a corner case
Comment 3 Yousuf Philips (jay) (retired) 2015-10-17 12:49:20 UTC 
Adding bibisect whiteboard.
Comment 4 Yousuf Philips (jay) (retired) 2015-10-18 14:25:27 UTC 
@Meeks, @Tomaz: Is this a possible OpenGL issue?
Comment 5 Michael Meeks 2015-10-19 10:54:31 UTC 
Oooh - nice =) thanks for the report - can reproduce here.
Comment 6 Michael Meeks 2015-10-19 11:17:48 UTC 
Interesting trace here; nothing to do with GL that I can see; looks like a race condition. Michael - I'm curious as to why we're processing any events (except) ones incoming around eg. DC & hWnd handling during the SolarMutexReleaser re-acquire. By processing random other events - we seem to have burned a lot of stack to no good purpose (thoughts?).

Kendy - who in the design team / sidebar hackery community is interested in this ? in a nutshell the

void PosSizePropertyPanel::SetPosXYMinMax()
{
    Rectangle aTmpRect(mpView->GetAllMarkedRect());
    mpView->GetSdrPageView()->LogicToPagePos(aTmpRect);

The SdrPageView is NULL here ...

    maRect = basegfx::B2DRange(aTmpRect.Left(), aTmpRect.Top(), aTmpRect.Right(), aTmpRect.Bottom());

will append the trace in a sec.
Comment 7 Michael Meeks 2015-10-19 11:18:43 UTC 
Created attachment 119744 [details]
trace.
Comment 8 Puggan SE 2015-10-21 22:59:07 UTC 
reproduceable in b684090d4f573eb339e93872d0cef07e69adc913

bibisected using dbgutil:

bug introduced in:
source-hash-17815049103b920df054b4f1bb8b1e99486972f2

bug not reproduceable in latests:
source-hash-d16e154c627ecc0cb21aaf4b28f7f5ae48ebbde1

solved?

bibisect log:
git bisect start
# good: [2b392af9c8f54629e3a3a98a8c92fa5af1c6722f] 2015-05-20: source-hash-90e2dabb8d0bb5382234be776c2ad0e2d5d9e224
git bisect good 2b392af9c8f54629e3a3a98a8c92fa5af1c6722f
# bad: [a5e78f6c0dc293449a02fe421c86d722494fb15d] 2015-10-16: source-hash-b684090d4f573eb339e93872d0cef07e69adc913
git bisect bad a5e78f6c0dc293449a02fe421c86d722494fb15d
# bad: [38ed8f16c69058ac5ee30a28ea0504404b1e9d03] 2015-08-02: source-hash-46d7003c3b4f9242265e3eb89b67d9322eecefc5
git bisect bad 38ed8f16c69058ac5ee30a28ea0504404b1e9d03
# bad: [97e4cfbb943a38683c30c02fde5d44fe5f4bb1a4] 2015-06-26: source-hash-ee3d40b30816a8fc6d4e8f984659c8dfac19ec3b
git bisect bad 97e4cfbb943a38683c30c02fde5d44fe5f4bb1a4
# skip: [1f8ef21cd72a4e63719a1bbb65d321a56ed80e88] 2015-06-07: source-hash-47cddc662efc470505f0b76427fa3092bae5550a
git bisect skip 1f8ef21cd72a4e63719a1bbb65d321a56ed80e88
# skip: [587d15ec717aed5d4abe657f3a96d4de29565bc7] 2015-06-01: source-hash-e61fcfea5c2a306e44a053976e921160e78917ac
git bisect skip 587d15ec717aed5d4abe657f3a96d4de29565bc7
# good: [7a286d694a0fc1faa6daf6eac93bcf4a59eebe08] 2015-05-21: source-hash-1c9302565aefb5a54b1b7f1478dd6dac724d30ea
git bisect good 7a286d694a0fc1faa6daf6eac93bcf4a59eebe08
# skip: [5cb97ad9fa3ab610defbf69382c860740a4117d3] 2015-06-08: source-hash-e2e058d450c1d2fdc6230933ec66c037971b9aea
git bisect skip 5cb97ad9fa3ab610defbf69382c860740a4117d3
# bad: [12ee5d282ca61a17d52d3ce0ea31ae69fada21b4] 2015-06-25: source-hash-e8938f2ddb5efa8a34d05995cd55cf337c7aaeff
git bisect bad 12ee5d282ca61a17d52d3ce0ea31ae69fada21b4
# skip: [316eb9b1559cb381167aef20738b9b9973d5c571] 2015-06-02: source-hash-0d7935bda6fb0ee4b63593b07c451b30f52b8598
git bisect skip 316eb9b1559cb381167aef20738b9b9973d5c571
# good: [6178f2a1052f501e7b34ad168708c6744a1838eb] 2015-05-23: source-hash-9db629b8a1fa9b63bc320f8d47594ec82511a9c5
git bisect good 6178f2a1052f501e7b34ad168708c6744a1838eb
# good: [a63d7336fa8ea346b4deb2d4076cbe8a1cd75d65] 2015-05-25: source-hash-b9630867d17c01ec41f6461b1e96288f3932248c
git bisect good a63d7336fa8ea346b4deb2d4076cbe8a1cd75d65
# good: [991c3db554ae2f30bcc215ccbe090656d9970c02] 2015-05-26: source-hash-af75d7a4c99414fabbd31b9df590266d28574fb1
git bisect good 991c3db554ae2f30bcc215ccbe090656d9970c02
# good: [a814cee0b38cabf6a0c042e9bcc616c8d96cac0f] 2015-06-10: source-hash-782c116b5ac39aef27c3a00f7fc145c9f755e3a3
git bisect good a814cee0b38cabf6a0c042e9bcc616c8d96cac0f
# good: [e48eb783142c667bfdad999f0edb90f8253b0b65] 2015-06-18: source-hash-fb6dd2a73074b9695bd8ddf7ba40f1819b03024e
git bisect good e48eb783142c667bfdad999f0edb90f8253b0b65
# good: [2585085ca772383156fa67688430f7b5437af8a3] 2015-06-21: source-hash-d2cefbe7effbee079c05a5a8234305650618fdc1
git bisect good 2585085ca772383156fa67688430f7b5437af8a3
# bad: [c4924c258b01210f140072b6dc6b13c7936e30c8] 2015-06-23: source-hash-17815049103b920df054b4f1bb8b1e99486972f2
git bisect bad c4924c258b01210f140072b6dc6b13c7936e30c8
# good: [c6cd95766d60d4fbbff22cca84d42feea2a600cb] 2015-06-22: source-hash-d16e154c627ecc0cb21aaf4b28f7f5ae48ebbde1
git bisect good c6cd95766d60d4fbbff22cca84d42feea2a600cb
# first bad commit: [c4924c258b01210f140072b6dc6b13c7936e30c8] 2015-06-23: source-hash-17815049103b920df054b4f1bb8b1e99486972f2
Comment 9 raal 2015-10-22 07:38:05 UTC 
Michael, vclptr issue?

/bibisect-win32-5.0:
 2a724ce8b94076777411d7d51fa3b8afd8ecef7c is the first bad commit
commit 2a724ce8b94076777411d7d51fa3b8afd8ecef7c
Author: Norbert Thiebaud <nthiebaud@gmail.com>
Date:   Tue Jun 2 00:32:03 2015 -0500

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Comment 10 Michael Stahl (allotropia) 2015-10-22 20:14:03 UTC 
looks like this should have made it stop crashing:

commit 27ccddf5034ec9e80a5adf93c630247bb5807676
Author:     Caolán McNamara <caolanm@redhat.com>
AuthorDate: Mon Oct 19 14:16:50 2015 +0100

    afl-eventtesting: deref of null GetSdrPageView


(In reply to Michael Meeks from comment #6)
> Interesting trace here; nothing to do with GL that I can see; looks like a
> race condition. Michael - I'm curious as to why we're processing any events
> (except) ones incoming around eg. DC & hWnd handling during the
> SolarMutexReleaser re-acquire. By processing random other events - we seem
> to have burned a lot of stack to no good purpose (thoughts?).

interestingly we don't process events recursively as such, rather there is
a mechanism to install a listener with Application::AddPostYieldListener()
and there is evidently one in
 sdlo.dll!sd::SlideshowImpl::PostYieldListener(LinkParamNone * __formal) Line 1798	
that calls Reschedule() - so right after we return from SalInstance::DoYield()
we yield again from ImplYield()!  (there's a Yo Dawg meme going on here)

i, for one, find this is highly un-intuitive.

git log says that Thorsten touched this thing so he clearly knows
what it is doing, see

commit 044c534b2deb985052e7977bba3290c5d2c3ad77
Author:     Thorsten Behrens <tbehrens@novell.com>
AuthorDate: Tue Sep 6 16:25:49 2011 +0200

    Fix hang in slideshow.
    
    This fixes fdo#32861, by processing all remaining events after the
    post-yield callback comes around (that's supposed to be the time
    when the app can spend time on event processing).
Comment 11 Michael Stahl (allotropia) 2015-10-22 20:16:18 UTC 
(and incidentally sd/source/ui/slideshow/slideshowimpl.cxx is
 the one and only caller of Application::AddPostYieldListener)
Comment 12 Thorsten Behrens (allotropia) 2015-10-22 21:34:37 UTC 
(In reply to Michael Stahl from comment #10)
> git log says that Thorsten touched this thing so he clearly knows
> what it is doing, see
> 
> commit 044c534b2deb985052e7977bba3290c5d2c3ad77
> Author:     Thorsten Behrens <tbehrens@novell.com>
> AuthorDate: Tue Sep 6 16:25:49 2011 +0200
> 
>     Fix hang in slideshow.
>     

You might think so. :)

I'm not surprised this mess broke after the timer rework; much of that
needs review (and excising I guess...).
Comment 13 Michael Meeks 2015-10-23 05:26:23 UTC 
I have de-bonging the whole slideshow usage of the main-loop on my TODO - but of course -very- happy to have someone else look at this; lets chat in Hamburg about it =) I hope that all the hacks there are obsoleted by Kendy's high-precision timer work to the main-loop - and we can kill all this non-obvious:

Application::EnableNoYieldMode, AddPostYieldListener etc. =)
Comment 14 Armin Le Grand 2015-11-03 15:57:48 UTC 
Could not reproduce in local build:
Version: 5.1.0.0.alpha1+
Build ID: be1b03a4b0f61b49a3aba8d6b78ae69be7295785
Locale: de-DE (de_DE)
Comment 15 Caolán McNamara 2015-11-04 12:32:38 UTC 
lets assume my crash testing fix is "good enough"
Comment 17 Robinson Tryon (qubit) 2015-12-15 11:03:30 UTC Comment hidden (obsolete)