Hi Phil
Thank you so much for further investigation!
Your change works fine on my Windows which is set to Japanese locale.
However I wonder the meanings of "DEFAULT_CHARSET". It does not appear to be
working, right?
To my understand, alphabetic font should be used if "DEFAULT_CHARSET" is chosen.
(So I think your change may be chosen "Arial,ANSI_CHARSET")
Thus I think we can fix as below:
```
diff -r 1a722ad6e23d
src/java.desktop/windows/classes/sun/awt/windows/WFontConfiguration.java
--- a/src/java.desktop/windows/classes/sun/awt/windows/WFontConfiguration.java
Tue Jul 28 09:05:36 2020 +0200
+++ b/src/java.desktop/windows/classes/sun/awt/windows/WFontConfiguration.java
Tue Jul 28 18:08:06 2020 +0900
@@ -165,6 +165,9 @@
private String findFontWithCharset(FontDescriptor[] fontDescriptors,
String charset) {
String fontName = null;
+ if (charset.equals("DEFAULT_CHARSET")) {
+ charset = "ANSI_CHARSET";
+ }
for (int i = 0; i < fontDescriptors.length; i++) {
String componentFontName = fontDescriptors[i].getNativeName();
if (componentFontName.endsWith(charset)) {
```
The following code is pointless as you said, so I agree with you to remove it.
if (fontName ==null) {
fontName = findFontWithCharset(fontDescriptors,"DEFAULT_CHARSET");
}
Thanks,
Yasumasa
On 2020/07/28 15:15, Philip Race wrote:
I do see some case when default is being returned.
subsetEncodingMap.put("alphabetic", "default");
which then needs an alphabetic font as part of the core script sequence.
Now looking at desc.isDefaultFont() && charset.equals("DEFAULT_CHARSET") Perhaps that could change the answer
in some cases you don't intend. For these UTF 8 locales there is nothing in the fontconfig that identifies the right font. The
"ja" in UTF-8.ja is not connected to "japanese" in the fontconfig file. Something like that may be the
right fix but it would be a bigger change. I am not sure how much it matters either. There just needs to be a font. In the
win9x days and when AWT was an "A" lib not using unicode maybe. Or maybe there's still some benefit to the right font
for the language still being set as the text component font but it is not happening anyway in this case and your fix won't
solve that. All roads lead to the latin/alphabetic font here. My thinking right now is to just make changes in
getTextComponentFontNameso it always returns something but only after the current code fails.
So instead of your fix, just add this there :
if (fontName ==null) {
if (fontDescriptors.length >0) {
return fontDescriptors[0].getNativeName();
}else {
fontName ="Arial,ANSI_CHARSET";
}
}
Not very satisfactory but then we can remove the comment about maybe returning
NULL. -phil.
On 7/27/2020 5:34 PM, Philip Race wrote:
This did start when we updated the fontconfiguration file but I think there was
nothing wrong with the update
and I found it could happen with the previous version if we just remove
"devanagari" from this line in the OLD version.
sequence.allfonts.UTF-8.ja=alphabetic,japanese,devanagari,dingbats,symbol
Removing that mimics what happened in the new version and is the first piece of
the puzzle.
I don't know why devanagari is even there. Possibly it is because that line was
derived from this one :-
sequence.allfonts.UTF-8.hi=alphabetic/1252,devanagari,dingbats,symbol
since hindi was the first UTF-8 locale that was supported and someone just
edited it to create the JA entry.
But it indicates to me that this is quite fragile and could easily have crashed
a long time ago if Devanagari were
not there as one of the "core fonts" for UTF-8.ja
Then in WFontConfiguration.initTables() a few things happen
first this
subsetCharsetMap.put("devanagari","DEFAULT_CHARSET");
subsetCharsetMap.put("japanese","SHIFTJIS_CHARSET");
[for devanagari JDK specifies the Mangal font.]
the subsetEncodinging map has this for Japanese
subsetEncodingMap.put("japanese", "windows-31j");
then this for UTF-8 for textInputCharset
}else if ("UTF-8".equals(defaultEncoding)) {
textInputCharset ="DEFAULT_CHARSET";
whereas for the old ms932/windows-31j code page we would have had this
}else if ("windows-31j".equals(defaultEncoding)) {
textInputCharset ="SHIFTJIS_CHARSET";
it then calls makeAWTFontName("MS Gothic", "japanese");
which looks like this :
WFontConfiguration.makeAWTFontName(String platformFontName, String
characterSubsetName) {
String windowsCharset = subsetCharsetMap.get(characterSubsetName);
if (windowsCharset ==null) {
windowsCharset ="DEFAULT_CHARSET";
}
return platformFontName +"," + windowsCharset;
}
For "japanese", the result of
subsetCharsetMap.get(characterSubsetName);
will always be"SHIFTJIS_CHARSET"
So the method will return "MS Gothic,SHIFTJIS_CHARSET"
and this will get stored in the FontDescriptor
The other core entries for Japanese map to ANSI_CHARSET and SYMBOL_CHARSET.
When in the old fontconfig file is called for "devanagari", it will return
"Mangal,DEFAULT_CHARSET".
Without that, there is no DEFAULT_CHARSET mapped for any font in the core
Japanese fonts.
This all becomes important when WFontConfiguration.getTextComponentFontName()
is called from native code.
It has this line
String fontName = findFontWithCharset(fontDescriptors, textInputCharset);
from above we know that for UTF-8 :
textInputCharset ="DEFAULT_CHARSET";
but as just noted above there are NO fonts tagged with that
So the look up fails. The code retries : -
if (fontName ==null) {
fontName = findFontWithCharset(fontDescriptors,"DEFAULT_CHARSET");
}
but that was pointless since DEFAULT_CHARSET is what was already tried.
Now back to the windows-31j locale, there we had
textInputCharset ="SHIFTJIS_CHARSET";
so that finds the match "MS Gothic,SHIFTJIS_CHARSET".
getTextComponentFontName() has the comment "May return null." which is true,
but not very helpful to the native caller, which bails out, leaving the
native font structs uninitialised and ready to cause a crash.
That's the kind of analysis I was hoping for !
Now, the question is, is what you propose the right fix for this ?
But I am not sure it can even work.
931 descriptors[i] = new FontDescriptor(awtFontName, enc, exclusionRanges,
encoding.equals("default")); seems like it will never pass true in my testing.
Then the whole fix falls apart. Can you show some evidence ? -phil
On 7/27/2020 3:50 PM, Yasumasa Suenaga wrote:
Hi Phil,
I confirmed WFontConfiguration::findFontWithCharset cannot find if
-Dfile.encoding=UTF-8 is passed.
I guess one of the cause is the definitions in
make/data/fontconfig/windows.fontconfig.properties, but also DEFAULT_CHARSET
does not work at this point.
If we do not pass -Dfile.encoding=UTF-8, `charset` in
WFontConfiguration::findFontWithCharset is set to "windows-31j" and it can find
out valid font when Windows is set to Japanese locale.
I can share minidump for further investigation. What should I do / share?
Thanks,
Yasumasa
On 2020/07/28 0:02, Philip Race wrote:
Hi,
You're avoiding a crash but I don't yet know what *exactly* caused the crash.
Some Java code not handling DEFAULT_CHARSET is obviously not the exact cause.
This just starts it and something bad presumably happens later in native code.
And I don't yet understand why (we think) this started happening when some
additional fonts were added to the file.
Knowing exactly what is wrong will help decide if this is the right fix.
-phil
On 7/24/20, 5:59 AM, Yasumasa Suenaga wrote:
Hi Jay,
I share you hs_err log of this issue.
`chcp` on my console shows "932" (MS932). It is Japanese locale.
I can share you if you want to know.
Thanks,
Yasumasa
On 2020/07/24 20:59, Jayathirth D V wrote:
Hi Yasumasa,
I tried after changing the locale to Japanese but I don’t see the issue.
Also tried to reproduce the issue by enabling/disabling setting "Beta:Use Unicode
UTF-8 for worldwide language support" in my locale setting.
@Others : Can somebody else try to reproduce this issue?
Thanks,
Jay
-----Original Message-----
From: Yasumasa Suenaga <suen...@oss.nttdata.com>
Sent: Thursday, July 23, 2020 5:41 PM
To: Jayathirth D v <jayathirth....@oracle.com>
Cc: 2d-dev <2d-...@openjdk.java.net>; awt-dev@openjdk.java.net
Subject: Re: [OpenJDK 2D-Dev] PING: RFR: 8249215: JFrame::setVisible crashed
with -Dfile.encoding=UTF-8
Hi Jay,
On 2020/07/23 19:09, Jayathirth D v wrote:
Hi,
I tried reproducing the issue in my Windows 10 machine with UTF-8 encoding and
test file mentioned in the bug, I don’t see any crash.
Am I missing something?
OS locale may be affecting.
My laptop has been set Japanese (CP932 / Windows-31J), so WFontConfiguration
attempt to find Japanese font by default.
However WFontConfiguration cannot find out the font of "DEFAULT_CHARSET" when
-Dfile.encoding=UTF-8 is passed.
Thanks,
Yasumasa
Also I think this should be in awt-dev so adding the mailing list.
Thanks,
Jay
On 20-Jul-2020, at 12:59 PM, Yasumasa Suenaga <suen...@oss.nttdata.com> wrote:
PING: could you review it?
JBS: https://bugs.openjdk.java.net/browse/JDK-8249215
webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8249215/webrev.00/
Yasumasa
On 2020/07/11 17:39, Yasumasa Suenaga wrote:
Hi all,
Please review this change:
JBS: https://bugs.openjdk.java.net/browse/JDK-8249215
webrev: http://cr.openjdk.java.net/~ysuenaga/JDK-8249215/webrev.00/
I tried to run Sample.java in JDK-8236161 with -Dfile.encoding=UTF-8, but JVM
crashed due to internal error on fastdebug VM. I saw same call stack with
JDK-8236161 in hs_err log.
I investigated it, then I found out current implementation cannot handle
default charset.
If charset is set to UTF-8, it would be handled as "DEFAULT_CHARSET" in
WFontConfiguration::initTables. However it does not affect native font name, so we cannot
find valid font.
This change has passed all tests on submit repo
(mach5-one-ysuenaga-JDK-8249215-20200711-0655-12566039)
Thanks,
Yasumasa
