On Thu, Aug 25, 2016 at 2:22 PM, Behdad Esfahbod <behdad@xxxxxxxxxx> wrote:
My understanding is that fontconfig API returns NULL only on allocation failures. So, I think you've hit a bug.
Same on my understanding.
On Aug 25, 2016 1:19 PM, "Alan Coopersmith" <alan.coopersmith@xxxxxxxxxx> wrote:While assisting with the investigation of:
[JDK-8160664] JVM crashed with font manager on Solaris 12
https://bugs.openjdk.java.net/browse/JDK-8160664
we discovered that if none of the font directories are present on the system
FcFontList() returns NULL, but if at least one is present, even if empty,
then it returns a valid pointer to a list of 0 entries.
Interesting. though I've tried to reproduce that situation by modifying fonts.conf containing invalid directories, fc-list does show no fonts but the returned value has a valid pointer rather than NULL.
Can you investigate more where the checking failed and then return NULL in fontconfig? and what version of fontconfig are you using?
This doesn't seem to be documented anywhere that I can find, but you
can see the fc-list utility checks for it all the way back to the
first revision in git. Is this intentional? Should it be documented
so other application authors know to check for NULL?
--
-Alan Coopersmith- alan.coopersmith@xxxxxxxxxx
Oracle Solaris Engineering - http://blogs.oracle.com/alanc
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