bug#41177: Fontconfig issues in Java applications that use fonts

bug#41177: Fontconfig issues in Java applications that use fonts

[Jonathan Frederickson]

[-- Attachment #1: Type: text/plain, Size: 396 bytes --]

I realized I forgot to submit a bug report for this after I posted on 
help-guix a while back, and looks like it's still an issue, so... I get 
a null pointer exception when attempting to run any Java application 
that uses fonts. I've attached an example of the error output I get, 
and you can find more info in this thread:

https://lists.gnu.org/archive/html/help-guix/2019-11/msg00122.html


[-- Attachment #2: javanpe.txt --]
[-- Type: text/plain, Size: 2922 bytes --]

jfred@lambdacrypt ~/Downloads/pcgen$ java -jar pcgen.jar 
11:52:16.300 INFO main Main:138 Starting PCGen v6.08.00 RC6
11:52:16.390 INFO main LanguageBundle:134 Initialising language bundle with locale en_US.
11:52:16.631 SEVERE main Main:484 Uncaught error - ignoring
java.lang.InternalError: java.lang.reflect.InvocationTargetException
	at java.desktop/sun.font.FontManagerFactory$1.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.desktop/sun.font.FontManagerFactory.getInstance(Unknown Source)
	at java.desktop/sun.font.FontUtilities.getFontConfigFUIR(Unknown Source)
	at java.desktop/javax.swing.plaf.nimbus.NimbusDefaults.<init>(Unknown Source)
	at java.desktop/javax.swing.plaf.nimbus.NimbusLookAndFeel.<init>(Unknown Source)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Unknown Source)
	at java.base/java.lang.reflect.ReflectAccess.newInstance(Unknown Source)
	at java.base/jdk.internal.reflect.ReflectionFactory.newInstance(Unknown Source)
	at java.base/java.lang.Class.newInstance(Unknown Source)
	at java.desktop/javax.swing.UIManager.setLookAndFeel(Unknown Source)
	at pcgen.gui2.plaf.LookAndFeelManager.setLookAndFeel(LookAndFeelManager.java:231)
	at pcgen.gui2.plaf.LookAndFeelManager.initLookAndFeel(LookAndFeelManager.java:151)
	at pcgen.system.Main.configureUI(Main.java:273)
	at pcgen.system.Main.startupWithGUI(Main.java:228)
	at pcgen.system.Main.main(Main.java:157)
Caused by: java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Unknown Source)
	at java.base/java.lang.reflect.Constructor.newInstance(Unknown Source)
	... 19 more
Caused by: java.lang.NullPointerException
	at java.desktop/sun.awt.FontConfiguration.getVersion(Unknown Source)
	at java.desktop/sun.awt.FontConfiguration.readFontConfigFile(Unknown Source)
	at java.desktop/sun.awt.FontConfiguration.init(Unknown Source)
	at java.desktop/sun.awt.X11FontManager.createFontConfiguration(Unknown Source)
	at java.desktop/sun.font.SunFontManager$2.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.desktop/sun.font.SunFontManager.<init>(Unknown Source)
	at java.desktop/sun.awt.FcFontManager.<init>(Unknown Source)
	at java.desktop/sun.awt.X11FontManager.<init>(Unknown Source)
	... 24 more

bug#41177: Fontconfig issues in Java applications that use fonts

[Fabien SK]

I faced the issue when running josm (downloaded from 
josm.openstreetmap.de, not the guix package). Using "strace" showed me 
that it failed because it cannot load "libfontconfig.so" (it tries in 
several directories). If I add the directory of libfontconfig.so to 
LD_LIBRARY_PATH, then it starts.
I have limited knowledge about how shared libraries are found. I tried 
to understand how "geany" manages to load libfontconfig.so. It looks 
like it depends on libgeany, libgtk3 and libpango which depend on 
libfontconfig. When I do a "readelf -a" on these libraries, I can see in 
their "RUNPATH" the path of "libfontconfig.so":
0x000000000000001d (RUNPATH)            Bibliothèque 
runpath:[/gnu/store/avjxs6qgyginkiq6qpk9280zakkaj35h-graphite2-1.3.13/lib:/gnu/store/xwl0p4m34bcan0v9vkjkyzwi6znsv4dm-pixman-0.38.4/lib:/gnu/store/y9fdy234r6hqiacd7hgwlmbdsngbp8p1-fontconfig-2.13.1/lib:…

Regarding Java, I think (but I'm not sure) that it's loaded by 
"libawt_xawt.so". In fontpath.c [1], there is a dlopen of libfontconfig. 
But if I do a "ldd" on the shared library itself, it looks like it does 
not depend on libfontconfig.so.
[1] 
https://github.com/openjdk/jdk16/blob/37043b05576c8b81b43ac41a8f06de0d0bbb3f5b/src/java.desktop/unix/native/common/awt/fontpath.c#L566
Also libfontconfig is not on its RUNPATH:

0x000000000000001d (RUNPATH)            Bibliothèque 
runpath:[$ORIGIN:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/lib:/gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib:/gnu/store/w09mqfj1yy32r2fr02nndzs34m4f9ipp-libxext-1.3.4/lib:/gnu/store/4ildmh169dixyn05mlgjz07x4d2hcq2g-libx11-1.6.A/lib:/gnu/store/8m6368gv4z10n6i31ppbr8nxziwmlp3f-libxrender-0.9.10/lib:/gnu/store/cgsk20z1gcw78fdm7bwlb2l49xh7bmzk-libxtst-1.2.3/lib:/gnu/store/b4dk2y4vf98dhxnr0p6f5h4d86vqndkc-libxi-1.7.10/lib:/gnu/store/01b4w3m6mp55y531kyi1g8shh722kwqm-gcc-7.5.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.5.0/../../..]

I'm quite a beginner in term of Guix (I only played with it in a VM), 
and I hope this information will be useful to somebody. I don't 
understand how the dependencies between executable and libraries are 
supposed to be done in Guix. I can see that sometimes in /gnu/store 
there are symbolic links of shared libraries into other packages. I 
assume that sometimes this RUNPATH is used.

bug#41177: Fontconfig issues in Java applications that use fonts

[Ludovic Courtès]

Hi,

Fabien SK <fabsk@free.fr> skribis:

> Regarding Java, I think (but I'm not sure) that it's loaded by
> "libawt_xawt.so". In fontpath.c [1], there is a dlopen of
> libfontconfig. But if I do a "ldd" on the shared library itself, it
> looks like it does not depend on libfontconfig.so.
> [1]
> https://github.com/openjdk/jdk16/blob/37043b05576c8b81b43ac41a8f06de0d0bbb3f5b/src/java.desktop/unix/native/common/awt/fontpath.c#L566
> Also libfontconfig is not on its RUNPATH:

Indeed, all the ‘openjdk’ packages have fontconfig has an input, but
‘guix size openjdk | grep fontconfig’ shows it’s not there, meaning that
nothing actually linked against fontconfig.

Perhaps we should patch this ‘fontpath.c’, with ‘substitute*’, so that
it refers to libfontconfig.so by its absolute file name?

Thanks,
Ludo’.

bug#41177: Fontconfig issues in Java applications that use fonts

[Björn Höfling]

[-- Attachment #1: Type: text/plain, Size: 1289 bytes --]

On Wed, 06 Jan 2021 12:05:54 +0100
Ludovic Courtès <ludo@gnu.org> wrote:

> Hi,
> 
> Fabien SK <fabsk@free.fr> skribis:
> 
> > Regarding Java, I think (but I'm not sure) that it's loaded by
> > "libawt_xawt.so". In fontpath.c [1], there is a dlopen of
> > libfontconfig. But if I do a "ldd" on the shared library itself, it
> > looks like it does not depend on libfontconfig.so.
> > [1]
> > https://github.com/openjdk/jdk16/blob/37043b05576c8b81b43ac41a8f06de0d0bbb3f5b/src/java.desktop/unix/native/common/awt/fontpath.c#L566
> > Also libfontconfig is not on its RUNPATH:  
> 
> Indeed, all the ‘openjdk’ packages have fontconfig has an input, but
> ‘guix size openjdk | grep fontconfig’ shows it’s not there, meaning
> that nothing actually linked against fontconfig.
> 
> Perhaps we should patch this ‘fontpath.c’, with ‘substitute*’, so that
> it refers to libfontconfig.so by its absolute file name?

We do that for icedtea (i.e. OpenJDK until version 8), but not for
OpenJDK. I applied the same trick for OpenJDK 9 and will no longer get
the NullPointerException.

Let me clean it up a bit and apply it to all later OpenJDKs as well
(might be already done through inheritence, but let me check), then I
will send out a patch.

Björn

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 195 bytes --]

bug#41177: Fontconfig issues in Java applications that use fonts

[Björn Höfling]

[-- Attachment #1: Type: text/plain, Size: 766 bytes --]

On Tue, 2 Feb 2021 10:11:46 +0100
Björn Höfling <bjoern.hoefling@bjoernhoefling.de> wrote:

> On Wed, 06 Jan 2021 12:05:54 +0100
> Ludovic Courtès <ludo@gnu.org> wrote:

> > Perhaps we should patch this ‘fontpath.c’, with ‘substitute*’, so
> > that it refers to libfontconfig.so by its absolute file name?  
> 
> We do that for icedtea (i.e. OpenJDK until version 8), but not for
> OpenJDK. I applied the same trick for OpenJDK 9 and will no longer get
> the NullPointerException.
> 
> Let me clean it up a bit and apply it to all later OpenJDKs as well
> (might be already done through inheritence, but let me check), then I
> will send out a patch.

Patch submitted as:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=46451

Björn

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 195 bytes --]