Author Topic: Qt6 Development  (Read 162298 times)

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #705 on: April 09, 2023, 12:36:48 am »
OK I got a DLL :) and some TRPs to go with it :) (attached)

The maps.exe one seems to be OpenGL related (not surprisingly) the second looks more straightforward

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #706 on: April 09, 2023, 04:18:42 am »
About 500 files to go and I get the following:
Code: [Select]
{1}[u:\dev\qt6-webengine-os2-6.5.x\build\src\core\release\i386] mksnapshot --tur
bo_instruction_scheduling --target_os=os2 --target_arch=x86 --embedded_src gen/v
8/embedded.S --embedded_variant Default --random-seed 314159265 --startup_src ge
n/v8/snapshot.cc --no-native-code-counters
Assertion failed: _UM_LUMP_STATUS (olump) == _UMS_FREE, file ./libc-0.1.10/src/emx/src/lib/malloc/ialloc.c, line 116

Killed by SIGABRT
pid=0x33b0 ppid=0x0041 tid=0x0001 slot=0x007d pri=0x0200 mc=0x0001 ps=0x0010
U:\DEV\QT6-WEBENGINE-OS2-6.5.X\BUILD\SRC\CORE\RELEASE\I386\MKSNAPSHOT.EXE
Creating 33B0_01.TRP
Moved 33b0_01.TRP to C:\var\log\app\64313478-33b0_01-MKSNAPSHOT-exceptq.txt

Edit: Cheated for now and replaced mksnapshot with the version from Qt 6.4.x

OK so this wasn't the best solution. Worked through a couple of other issues and now get:
Code: [Select]
# Fatal error in , line 0
# Version mismatch between V8 binary and snapshot.
#   V8 binary version: 10.8.168.25
#    Snapshot version: 10.2.154.17
# The snapshot consists of 288000 bytes and contains 1 context(s).
#
#
#
#FailureMessage Object: 0x12f104
Killed by SIGTRAP

Andy Willis

  • Sr. Member
  • ****
  • Posts: 290
  • Karma: +7/-0
    • View Profile
Re: Qt6 Development
« Reply #707 on: April 09, 2023, 09:29:23 pm »
xpdf is working with 6.5

Hi Andy.
Please post the binaries to test it out. I don't know where those are.

Regards

Ha!  I was able to sneak something past you!  :-) :-)
https://www.os2world.com/forum/index.php/topic,3252.msg38877/topicseen.html#msg38877

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #708 on: April 13, 2023, 12:30:47 am »
Sometimes it pays to not look at something for a few days. Finally, I noticed some differences that needed implementing in page_allocator_internals_os2.h and got past the previous trap (in Qt 6.4.3).

Commits in https://github.com/psmedley/qt6-webengine-os2/commit/f49a4993adc8f58091a7396dfe91dda1252ce874 - the key fix was the first section, adding the additional cases
New TRP attached which I'll investigate shortly.
« Last Edit: April 13, 2023, 12:41:02 am by Paul Smedley »

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #709 on: April 13, 2023, 11:05:11 am »
Some analysis from Steven on the latest trp that I'm still digesting...
Code: [Select]
>> Is this an alignment problem?
> Not sure yet. The trap appears to be happening at
> https://github.com/psmedley/qt6-webengine-os2/blob/6.4.x/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/parkable_image_manager.cc#L33

> but not sure why yet...

FWIW, the caller is:

  src\3rdparty\chromium\third_party\blink\renderer\platform\exported\platform.cc:251
    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
        &ParkableImageManager::Instance(), "ParkableImages",
        base::ThreadTaskRunnerHandle::Get());

I think the generated code in the constructor is trying implement a "fast
memset" to clear the instance object.  The PXOR clears the XMM0 and the
MOVAPS instructions zero 16-byte chunks of memory.  This is going to be
faster than the rep movsd we typically see.

The problem here is that 0xfb31248 needs to be 16-byte aligned and it's
not.

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #710 on: April 13, 2023, 12:36:20 pm »
Not sure where else to post it, but I'm in the midst of changing ISP so the website is currently offline. Will hopefully be back online in the next few hours.

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #711 on: April 13, 2023, 05:03:18 pm »
Should be back up now, DNS has been updated

Martin Iturbide

  • OS2World NewsMaster
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 4658
  • Karma: +41/-1
  • Your Friend Wil Declares...
    • View Profile
    • Martin's Personal Blog
Re: Qt6 Development
« Reply #712 on: April 13, 2023, 05:40:03 pm »
Hi Paul

I confirm I see your website: https://os2ports.smedley.id.au/
... and you Mantis page. https://mantis.smedley.id.au

Regards
Martin Iturbide
OS2World NewsMaster
... just share the dream.

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #713 on: April 14, 2023, 04:42:34 am »
Some analysis from Steven on the latest trp that I'm still digesting...
Code: [Select]
>> Is this an alignment problem?
> Not sure yet. The trap appears to be happening at
> https://github.com/psmedley/qt6-webengine-os2/blob/6.4.x/src/3rdparty/chromium/third_party/blink/renderer/platform/graphics/parkable_image_manager.cc#L33

> but not sure why yet...

FWIW, the caller is:

  src\3rdparty\chromium\third_party\blink\renderer\platform\exported\platform.cc:251
    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
        &ParkableImageManager::Instance(), "ParkableImages",
        base::ThreadTaskRunnerHandle::Get());

I think the generated code in the constructor is trying implement a "fast
memset" to clear the instance object.  The PXOR clears the XMM0 and the
MOVAPS instructions zero 16-byte chunks of memory.  This is going to be
faster than the rep movsd we typically see.

The problem here is that 0xfb31248 needs to be 16-byte aligned and it's
not.

OK I got a potential patch for this overnight, unfortunately I'd made a separate change which triggered a partial rebuild which is almost complete and I will test.

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #714 on: April 14, 2023, 04:43:08 am »
Hi Paul

I confirm I see your website: https://os2ports.smedley.id.au/
... and you Mantis page. https://mantis.smedley.id.au

Regards

Thanks - unfortunately IPv4 only at this stage, but working on getting an IPv6 tunnel setup.

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #715 on: April 16, 2023, 12:20:40 am »
Not the most exciting screenshot in the world, but this is the first page successfully rendered in QtWebEngine 6.4.3

This is only possibile due to a dirty hack in the code, and any page more complex than this simple HTML only page results in another crash....

Just wanted to show some progress :P

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #716 on: April 16, 2023, 09:57:04 am »
Actually, with javascript disabled - it's quite stable - not terribly useful, but stable...

Paul Smedley

  • Hero Member
  • *****
  • Posts: 2086
  • Karma: +159/-0
    • View Profile
Re: Qt6 Development
« Reply #717 on: April 18, 2023, 11:23:47 am »
OK, the TRPs with 6.4.3 and 6.5.0 are driving me nuts. I'm going to try and stabilise the qt 6.3.2 webengine and fix and traps there. That might shed some light on stuff I've missed...

Mentore

  • Full Member
  • ***
  • Posts: 148
  • Karma: +4/-0
    • View Profile
Re: Qt6 Development
« Reply #718 on: April 18, 2023, 01:16:22 pm »
OK, the TRPs with 6.4.3 and 6.5.0 are driving me nuts. I'm going to try and stabilise the qt 6.3.2 webengine and fix and traps there. That might shed some light on stuff I've missed...

Most probably. I second your idea. Keep letting us know how things are going.
Mentore

Martin Iturbide

  • OS2World NewsMaster
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 4658
  • Karma: +41/-1
  • Your Friend Wil Declares...
    • View Profile
    • Martin's Personal Blog
Re: Qt6 Development
« Reply #719 on: April 18, 2023, 09:07:53 pm »
OK, the TRPs with 6.4.3 and 6.5.0 are driving me nuts. I'm going to try and stabilise the qt 6.3.2 webengine and fix and traps there. That might shed some light on stuff I've missed...
Hi. Sounds like a great plan to me. Just keep pushing out the 6.3.2 releases and I will try it out.
Regards
Martin Iturbide
OS2World NewsMaster
... just share the dream.