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Update OSGi headers for the JNA bundle to support 32bit ARM on Raspberry Pi 3 B+#1147

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matthiasblaesing merged 1 commit intojava-native-access:masterfrom
mattixtech:master
Oct 25, 2019
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Update OSGi headers for the JNA bundle to support 32bit ARM on Raspberry Pi 3 B+#1147
matthiasblaesing merged 1 commit intojava-native-access:masterfrom
mattixtech:master

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@mattixtech mattixtech commented Oct 25, 2019 •
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This PR updates the build of the JNA OSGi bundle to support an additional processor architecture to allow the bundle to be installed on OSGi running on Raspberry Pi 3 B+ with a 32bit OS.

Apache Felix's OSGi implementation reports the osgi.native.processor as either arm_le or arm_be when the system property os.arch returns arm.

When running a 32bit OS on the RPi Java reports arm for os.arch which is normalized to arm_le by Felix. Because of this, the JNA bundle cannot be installed since this architecture is not currently listed in the OSGi Bundle-NativeCode header. When attempting to start the bundle you get the following error:

Error executing command: Error executing command on bundles:
	Error starting bundle 13: Unable to resolve com.sun.jna [13](R 13.0): missing requirement [com.sun.jna [13](R 13.0)] osgi.native; (|(&(osgi.native.osname~=win32)(osgi.native.processor~=x86))(&(osgi.native.osname~=win32)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=win)(osgi.native.processor~=x86))(&(osgi.native.osname~=win)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=wince)(osgi.native.processor~=arm))(&(osgi.native.osname~=sunos)(osgi.native.processor~=x86))(&(osgi.native.osname~=sunos)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=sunos)(osgi.native.processor~=sparc))(&(osgi.native.osname~=sunos)(osgi.native.processor~=sparcv9))(&(osgi.native.osname~=aix)(osgi.native.processor~=ppc))(&(osgi.native.osname~=aix)(osgi.native.processor~=ppc64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc64le))(&(osgi.native.osname~=linux)(osgi.native.processor~=x86))(&(osgi.native.osname~=linux)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=linux)(osgi.native.processor~=arm))(&(osgi.native.osname~=linux)(osgi.native.processor~=armel))(&(osgi.native.osname~=linux)(osgi.native.processor~=aarch64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ia64))(&(osgi.native.osname~=linux)(osgi.native.processor~=sparcv9))(&(osgi.native.osname~=freebsd)(osgi.native.processor~=x86))(&(osgi.native.osname~=freebsd)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=openbsd)(osgi.native.processor~=x86))(&(osgi.native.osname~=openbsd)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=macosx)(|(osgi.native.processor~=x86)(osgi.native.processor~=x86-64)(osgi.native.processor~=ppc)))) Unresolved requirements: [[com.sun.jna [13](R 13.0)] osgi.native; (|(&(osgi.native.osname~=win32)(osgi.native.processor~=x86))(&(osgi.native.osname~=win32)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=win)(osgi.native.processor~=x86))(&(osgi.native.osname~=win)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=wince)(osgi.native.processor~=arm))(&(osgi.native.osname~=sunos)(osgi.native.processor~=x86))(&(osgi.native.osname~=sunos)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=sunos)(osgi.native.processor~=sparc))(&(osgi.native.osname~=sunos)(osgi.native.processor~=sparcv9))(&(osgi.native.osname~=aix)(osgi.native.processor~=ppc))(&(osgi.native.osname~=aix)(osgi.native.processor~=ppc64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ppc64le))(&(osgi.native.osname~=linux)(osgi.native.processor~=x86))(&(osgi.native.osname~=linux)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=linux)(osgi.native.processor~=arm))(&(osgi.native.osname~=linux)(osgi.native.processor~=armel))(&(osgi.native.osname~=linux)(osgi.native.processor~=aarch64))(&(osgi.native.osname~=linux)(osgi.native.processor~=ia64))(&(osgi.native.osname~=linux)(osgi.native.processor~=sparcv9))(&(osgi.native.osname~=freebsd)(osgi.native.processor~=x86))(&(osgi.native.osname~=freebsd)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=openbsd)(osgi.native.processor~=x86))(&(osgi.native.osname~=openbsd)(osgi.native.processor~=x86-64))(&(osgi.native.osname~=macosx)(|(osgi.native.processor~=x86)(osgi.native.processor~=x86-64)(osgi.native.processor~=ppc))))]

I confirmed the version of libjnidispatch.so could be loaded and that our feature utilizing JNA was working after updating the bundle with the changes in this PR. The bundle can now install and start without error.

Note that on the same hardware when running a 64bit OS the current JNA bundle can be installed fine since the arch is reported as aarch64 in that case which is already covered.

For reference here is how the ARM architecture is normalized by Felix:
https://github.com/apache/felix/blob/6ee15de7548c56129f82957a1af9f2f78db42922/framework/src/main/java/org/apache/felix/framework/util/manifestparser/NativeLibraryClause.java#L718

And according to the OSGi reference here it appears that what Felix is doing is correct:
https://www.osgi.org/developer/specifications/reference/

Test setup details:
Apache Karaf 4.2.6 on Ubuntu server 18.04 32bit

admin@minion> system:version
4.2.6

ubuntu@ubuntu:/$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.3 LTS
Release:	18.04
Codename:	bionic

ubuntu@ubuntu:/$ uname -a
Linux ubuntu 4.15.0-1049-raspi2 #53-Ubuntu SMP PREEMPT Wed Oct 2 01:06:03 UTC 2019 armv7l armv7l armv7l GNU/Linux

ubuntu@ubuntu:/$ lscpu
Architecture:        armv7l
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  1
Core(s) per socket:  4
Socket(s):           1
Vendor ID:           ARM
Model:               4
Model name:          Cortex-A53
Stepping:            r0p4
CPU max MHz:         1400.0000
CPU min MHz:         600.0000
BogoMIPS:            38.40
Flags:               half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32

ubuntu@ubuntu:/$ java -version
openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3)
OpenJDK Server VM (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3, mixed mode)

@matthiasblaesing matthiasblaesing merged commit 67952fb into java-native-access:master Oct 25, 2019
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matthiasblaesing commented Oct 25, 2019

Thank you.

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