Yes! ;-)
*From:*Anton V. Tarasov [mailto:anton.tara...@oracle.com]
*Sent:* Thursday, July 2, 2015 3:26 PM
*To:* Hruda, Steve
*Cc:* Kevin Rushforth; openjfx-dev@openjdk.java.net
*Subject:* Re: Patch for JDK-8090098 - [regression] Webview - getTimezoneOffset() of a ISO strings
returns a wrong value
Ok, got it. You suggest trying the only 2-line change?
Anton.
On 02.07.2015 15:54, Hruda, Steve wrote:
HI Anton,
The diff fix must be there.
if (diff<0)
diff += secondsPerDay;
… but the following fixes are unnecessary, for the midnight bug. I think
one of these fixes
could be the problem.
http://cr.openjdk.java.net/~ant/JDK-8090098/webrev.0/
<http://cr.openjdk.java.net/%7Eant/JDK-8090098/webrev.0/>
which contains the following fixed issues:
http://trac.webkit.org/changeset/174377
http://trac.webkit.org/changeset/175078
http://trac.webkit.org/changeset/181360
Regards,
Steve
*From:*Anton V. Tarasov [mailto:anton.tara...@oracle.com]
*Sent:* Thursday, July 2, 2015 2:50 PM
*To:* Hruda, Steve
*Cc:* Kevin Rushforth; openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
*Subject:* Re: Patch for JDK-8090098 - [regression] Webview -
getTimezoneOffset() of a ISO
strings returns a wrong value
Hi Steve,
Actually, I already checked that removing
if (diff<0)
diff += secondsPerDay;
didn't help.
Regards,
Anton.
On 02.07.2015 13:09, Hruda, Steve wrote:
Hi Anton,
I saw your comments on https://bugs.openjdk.java.net/browse/JDK-8090098.
We’ve opened the test page which you have mentioned in our own compiled
WebKit version ->
clean build & latest version.
Used Timezone: Vienna CEST – current Offset UTC+2:00
Without our Fix:
Only the first and latest test pass.
With our Fix:
The same – only the first and latest test pass.
It seems that one changeset regress this behavior, but not the our
latest “if –fix”
if (diff<0)
diff += secondsPerDay;
I’m not able to build openjfx because of the missing dependencies
(1.3). Please can you
try what happens if you only apply the diff fix and not the previous
patch, which includes
all other date fixes. From my point of view are these fixes (which
were provided by the
patch file) not necessary to solve our datepicker problem.
Thanks in advance,
Steve
*From:*Kevin Rushforth [mailto:kevin.rushfo...@oracle.com]
*Sent:* Tuesday, June 30, 2015 11:17 PM
*To:* Hruda, Steve
*Cc:* Anton V. Tarasov; openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
*Subject:* Re: Patch for JDK-8090098 - [regression] Webview -
getTimezoneOffset() of a ISO
strings returns a wrong value
Not by itself, although regressions are certainly taken very seriously.
In any case, the process is to get this into 9-dev (once it has been
reviewed), test it
thoroughly, and then consider whether we can make a case for taking it
to the 8u60 release
team.
-- Kevin
Hruda, Steve wrote:
Is a regression not release critical?
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-----Original Message-----
From: Kevin Rushforth [mailto:kevin.rushfo...@oracle.com]
Sent: Tuesday, June 30, 2015 10:45 PM
To: Anton V. Tarasov
Cc: Hruda, Steve;openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
Subject: Re: Patch for JDK-8090098 - [regression] Webview -
getTimezoneOffset() of a ISO strings returns a wrong value
Anton V. Tarasov wrote:
On 30.06.2015 21:13, Hruda, Steve wrote:
Hi Anton,
thanks for the detailed information and the good news.
You talk about JDK's jira? Am I right? ..... I don't have
an access
for that JIRA system since the JavaFX's Jira has moved to
the JDK Bug
System.
Ah, ok. Then I'll quote your e-mail.
About the Apple stuff.
I know that Apple dropped Windows Safari support and in my
opinion is
this a very bad situation for WebKit (in case of
Windows).... and
especially since Google and Opera using Google's Blink
engine.
In case of the JDK it would be more practicable to switch
from WebKit
to Blink, because this engine is still used by Companies
which have
Windows end-users.
There is a high probability that WebKit get more such bugs
if there
is no big player like Google or Apple who has the man power
to fix
such OS dependent issues.
I see. However, switching to Blink is another story. Honestly,
we're
not planning it in the nearest future. This requires extra
resources
which we don't have at the moment...
Last questions:
Do you need any additional information from my side? And is
it
possible to integrate this fix in 8u60?
From my side, I'll do a sanity check with WebKit LayoutTests,
then if
it goes well, we can consider commiting this to 8u60.
@Kevin, do you think we can?
Very unlikely. The JDK release team would need to approve, and only
release-critical issues may be considered at this point (it would be hard to
argue that this is release-critical since it has already been deferred).
-- Kevin
Also, as an option for you (Steve). You can post the changes to
the
WebKit alias and ask if they think this is a valid fix for the
issue.
Any confirmation from the WebKit team would help us to make
sure the
fix is reliable.
Thanks!
Anton.
Thanks in advance!
Best Regards,
Steve
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-----Original Message-----
From: Anton V. Tarasov [mailto:anton.tara...@oracle.com]
Sent: Tuesday, June 30, 2015 8:01 PM
To: Hruda, Steve; Kevin Rushforth
Cc:openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
Subject: Re: Patch for JDK-8090098 - [regression] Webview -
getTimezoneOffset() of a ISO strings returns a wrong value
Steve,
I applied your suggestion and it worked on Windows.
The missed check you discovered could really be a mistake
in WebKit,
because Apple dropped releasing (and shipping nightly
builds for)
Safari for Windows at 2012.
Safari 5.1.7 was the last version. I downloaded and checked
it. The
date bug is not reproducible with it, but this gives us
almost
nothing taking into account the version is much outdated.
So that Windows code path might not have been well tested,
since
http://trac.webkit.org/changeset/159892 was commited...
(WebKit Win port is still supported and can be built on
your own.)
What I can do else to verify the changes is to run WebKit
LayoutTests
aimed at date testing and see if there're no regressions.
Also, please put the info you posted into JIRA.
Regards,
Anton.
On 29.06.2015 21:42, Anton Tarasov wrote:
Hi Steve,
Ok, I'll investigate it.
Thanks,
Anton.
On 29.06.2015 18:39, Hruda, Steve wrote:
Hi Anton & Kevin,
we read your comments in the JDK bug system and
analyzed WebKit's
changesets again.
We’ve found the code which made this regression.
http://trac.webkit.org/changeset/159892
This changeset doesn't handle one special case,
which was handled
by the previous code....
double diff = ((localSystemTime.wHour - offsetHour)
*
secondsPerHour)
+ ((localSystemTime.wMinute
- offsetMinute) *60);
(http://trac.webkit.org/browser/trunk/Source/WTF/wtf/DateMath.cpp?a
nn
otate=blame#L481 )
The diff is wrong if the calculated the offsetTime
is one day
before in case of the extreme values (e.g.
midnight) where the
offsetHour of the UTC time is 23 because of the
day difference.
In case of all other OS systems you will see the same
code ->
http://trac.webkit.org/browser/trunk/Source/WTF/wtf/DateMath.cpp?an
no
tate=blame#L495
But there are two additional lines -> 497 & 497
which fixes this
special case…
*if*(diff<0)
diff += secondsPerDay;
That means ….
localSystemTime.wHour = 0;
offsetHour=23 … which causes a negative value … and
the
diff+=secondsPerDay ensures that the diff result
would be one Hour
instead of -23 hours
We’ve found the attached V8DateTests.js (renamed to
.txt) and
adjusted it a little bit to get the results logged
in the browsers
console.
As you can see at “ResulBeforeOurBugFix.txt” and
“ResultAfterOurBugFix.txt”, we were able to fix
6 tests which failed before out bug fix.
assertEquals("Sat Oct 25 2014 23:00:00 GMT+0200 (W.
Europe Daylight
Time)",
(new Date(2014, 9, 25, 23,
0)).toString());
assertEquals("Sat, 25 Oct 2014 21:00:00 GMT",
(new Date(2014, 9, 25, 23,
0)).toUTCString());
assertEquals("Sat Oct 25 2014 23:59:00 GMT+0200
(W. Europe
Daylight Time)",
(new Date(2014, 9, 25, 23,
59)).toString());
assertEquals("Sat, 25 Oct 2014 21:59:00 GMT",
(new Date(2014, 9, 25, 23,
59)).toUTCString());
assertEquals("Sun Oct 26 2014 00:00:00 GMT+0200
(W. Europe
Daylight Time)",
(new Date(2014, 9, 26, 0,
0)).toString());
assertEquals("Sun Oct 26 2014 00:59:00 GMT+0200 (W.
Europe Daylight
Time)",
(new Date(2014, 9, 26, 0,
59)).toString());
In addition we found out that WebKit also have
problems in case of
Windows in case of the change from winter to summer
time.
*_Winter to summer time:_*
assertEquals("Sun Mar 30 2014 03:00:00 GMT+0200 (W.
Europe Daylight
Time)",
(new Date(2014, 2, 30, 2,
0)).toString());
assertEquals("Sun, 30 Mar 2014 01:00:00 GMT",
(new Date(2014, 2, 30, 2,
0)).toUTCString());
assertEquals("Sun Mar 30 2014 03:59:00 GMT+0200
(W. Europe
Daylight Time)",
(new Date(2014, 2, 30, 2,
59)).toString());
assertEquals("Sun, 30 Mar 2014 01:59:00 GMT",
(new Date(2014, 2, 30, 2,
59)).toUTCString());
*_Summer to winter time:_*
assertEquals("Sun Oct 26 2014 02:00:00 GMT+0200 (W.
Europe Daylight
Time)",
(new Date(2014, 9, 26, 2,
0)).toString());
assertEquals("Sun, 26 Oct 2014 00:00:00 GMT",
(new Date(2014, 9, 26, 2,
0)).toUTCString());
assertEquals("Sun Oct 26 2014 02:59:00 GMT+0200
(W. Europe
Daylight Time)",
(new Date(2014, 9, 26, 2,
59)).toString());
assertEquals("Sun, 26 Oct 2014 00:59:00 GMT",
(new Date(2014, 9, 26, 2,
59)).toUTCString());
We will try to find a solution for that, but I
think that the
priority of this issue is lower than the priority
of the opened
regression.
It would be amazing if you can add the patch of my
previous and
these additional two lines
(DateMath.cpp) to the JDK8u60.
Best Regards,
Steve
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-----Original Message-----
From: openjfx-dev
[mailto:openjfx-dev-boun...@openjdk.java.net] On
Behalf Of Hruda, Steve
Sent: Tuesday, June 23, 2015 6:26 PM
To: Anton V. Tarasov; Kevin Rushforth
Cc:openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
Subject: RE: Patch for JDK-8090098 - [regression]
Webview -
getTimezoneOffset() of a ISO strings returns a
wrong value
Very cool Anton.
I would be great if that pach could be added to
8u60, otherwise our
all our customers have to avoid Java 8u60.
Regards,
Steve
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-----Original Message-----
From: Anton V. Tarasov
[mailto:anton.tara...@oracle.com]
Sent: Tuesday, June 23, 2015 5:46 PM
To: Kevin Rushforth; Hruda, Steve
Cc:openjfx-dev@openjdk.java.net
<mailto:openjfx-dev@openjdk.java.net>
Subject: Re: Patch for JDK-8090098 - [regression]
Webview -
getTimezoneOffset() of a ISO strings returns a
wrong value
On 23.06.2015 17:48, Kevin Rushforth wrote:
Hi Steve,
Thank you for taking the time to create this
patch. I will add
this information to the bug report.
Since your OCA is in progress we will take a
look at your patch,
but will need indication from the OCA office
that it the OCA has
been received before we could push it. And just
to be clear, you
won't have access to the repository even with
an OCA. What the OCA
will do is allow you to contribute
patches.
I will note that it is likely too late for
8u60, but Anton can
evaluate it and post his comment in the bug
report.
Kevin,
I'm checking it.
Steve, thanks for the participation!
Regards,
Anton.
-- Kevin
Hruda, Steve wrote:
Hi,
I've created a 8u-dev patch for the
following WeKit regression
which comes with 8u60.
https://bugs.openjdk.java.net/b
<https://bugs.openjdk.java.net/browse/JDK-8090098>
rowse/JDK-8090098
<https://bugs.openjdk.java.net/browse/JDK-8090098>
Please can someone of you apply this patch
to fix the
getTimezoneOffset() issue. I have no access to
the repository ->
my OCA is still pending.
In addition I tried to test this patch ,
but I wasn't able to
build the necessary jfxwebkit.dll on my
windows system
(https://www.mail-archive.com/openjfx-dev@openjdk.java.net/msg094
3
9.h
tml )..... but I got no compile erros on
Mac.
Patch download:
https://drive.google.com/file/d/0B7P_rknS1TWxM3BSTTU2OVZ4dGM/view
?u
sp
=sharing
The patch includes the following WebKit
fixes:
Changeset 174377 - [Win] DateMath's
calculateUTFOffset does not
account for DST.
http://trac.webkit.org/changeset/174377
Changeset 175078 - String(new Date(Mar 30
2014 01:00:00)) is
wrong in CET
http://trac.webkit.org/changeset/175078
Changeset 181360 - [Win] 17 different JSC
tests started to fail
in DST
http://trac.webkit.org/changeset/181360
Please let me know if you need further
information.
Thanks in advance!
Best Regards
Steve
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