jruby fails with error message on openJDK and ppc64le

[ralphbellofatto]

the following simple test script.

cat testfs.rb

require 'fileutils'

puts "File.stat called"
stat = File.stat("/bin/ls")
puts "File.stat returned"

and then obtain the http://ci.jruby.org/snapshots/jruby-1_7/jruby-dist-1.7.20-SNAPSHOT-bin.tar.gz file and untar it.

and then run this program:

unset JAVA_HOME
java -version
./jruby-1.7.20-SNAPSHOT/bin/jruby ./testfs.rb

and this is the result:

openjdk version "1.8.0_40-internal"
OpenJDK Runtime Environment (build 1.8.0_40-internal-b09)
OpenJDK 64-Bit Server VM (build 25.40-b13, mixed mode)

File.stat called
OpenJDK 64-Bit Server VM warning: You have loaded library /home/ralphbel/jruby/jruby-1.7.20-SNAPSHOT/lib/jni/ppc64-Linux/libjffi-1.2.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
File.stat returned

on the ibm jdk it works different.

java version "1.7.0"
Java(TM) SE Runtime Environment (build pxl6470_27sr1fp1-20140708_01(SR1 FP1))
IBM J9 VM (build 2.7, JRE 1.7.0 Linux ppc64le-64 Compressed References 20140707_205525 (JIT enabled, AOT enabled)
J9VM - R27_Java727_SR1_20140707_1408_B205525
JIT  - tr.r13.java_20140410_61421.07
GC   - R27_Java727_SR1_20140707_1408_B205525_CMPRSS
J9CL - 20140707_205525)
JCL - 20140707_01 based on Oracle 7u65-b16

[tulgpu002 jruby] $ ./jruby-1.7.20-SNAPSHOT/bin/jruby ./testfs.rb
File.stat called
Mar 19, 2015 10:50:37 AM jnr.ffi.provider.jffi.NativeRuntime buildNativeTypeAliases
SEVERE: failed to load type aliases: java.lang.ClassNotFoundException: jnr.ffi.provider.jffi.platform.unknown.linux.TypeAliases
File.stat returned

We believe the first problem is caused by openJDK reporting os.arch incorrectly as referenced in this openJDK bug report: https://bugs.openjdk.java.net/browse/JDK-8073139

The second problem is missing TypeAliases for ppc64 and ppc64le architectures in the jnr.ffi library.