Issues running tests on ubuntu bionic

[tjwatson]

I have the following installed:

Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.2 LTS
Release:	18.04
Codename:	bionic

adoptopenjdk-8-openj9xl/bionic,now 8u282-b08.openj9-0.24.0-3 amd64 [installed]

criu/bionic,now 3.6-2 amd64 [installed]

The classes and native library compile fine. In order to find the libcriu.so library I had to add /usr/lib/x86_64-linux-gnu to the LD_LIBRARY_PATH. Not sure why the library was not automatically available from the install of criu to Java. After that the tests still fail but now with this error:

[ERROR] /usr/lib/jvm/adoptopenjdk-8-openj9xl-amd64/jre/bin/java: symbol lookup error: /tmp/libCheckpointRestore.so: undefined symbol: criu_init_opts

What version of criu must be installed for this to work? (warning, I am very rusty on developing and building JNI libraries so this could just be a simple error on my part.

[tjwatson]

This seems the same as others had with the previous prototype at chflood/CRIUForJava#1

Maybe this is ubuntu specific.

[tjwatson]

This seems to make it work on ubuntu:

export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libcriu.so

While adding /usr/lib/x86_64-linux-gnu/ to LD_LIBRARY_PATH does not seem to help.

[vijaysun-omr]

https://stackoverflow.com/questions/9558909/jni-symbol-lookup-error-in-shared-library-on-linux/13086028

has some other comments that look relevant (in addition to the LD_PRELOAD option) around how the code should be built using gcc

[tjwatson]

More clarification. I still need to make sure to set LD_LIBRARY_PATH AND LD_PRELOAD to get the tests to pass. If I remove the explicit call to System.loadLibrary("criu"); then I can get it to pass by only setting export LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libcriu.so