How to specity the -agentlib option in a jtreg test?

[Jonathan Gibbons]

OK, thanks for clarifying.

The question is, should -agentlib use the system property (that is 
already being set) or should jtreg set LD_LIBRARY_PATH (which is 
platform specific.)

-- Jon

On 04/18/2016 04:53 AM, Alexander Kulyakhtin wrote:
> Jon,
>
> In the 'rerun' section I have:
>
> images/jdk/bin/java \\
> ...
> -Dtest.nativepath=<...>images/test/hotspot/jtreg/native
> -Djava.library.path=<...>images/test/hotspot/jtreg/native
> -agentlib:TestGetModules
> ...
>
> While TestGetModules.so does reside in the images/test/hotspot/jtreg/native, jtreg does not set LD_LIBRARY_PATH to that directory before invoking java.
> Therefore -agentlib does not know where to look for the library.
> The System.loadLibrary, on the contrary, does succeed because of the -Djava.library.path passed to java.
>
> Best regards,
> Alexander
>
> ----- Original Message -----
> From: jonathan.gibbons at oracle.com
> To: jtreg-use at openjdk.java.net
> Sent: Friday, April 15, 2016 7:05:18 PM GMT +03:00 Iraq
> Subject: Re: How to specity the -agentlib option in a jtreg test?
>
> jtreg should report the command it is trying to execute in the "rerun"
> section.
>
> If you execute that command directly, does it work?   In other words,
> can you isolate the problem to jtreg or to the execution of the command
> that jtreg execs?
>
> -- Jon
>
> On 04/15/2016 07:53 AM, Staffan Larsen wrote:
>> I don’t know why it does not work for -agentlib, but as a workaround you can create an @driver class that launches your test program with the -agentpath parameter and get the location of the native libraries through the system property test.nativepath.
>>
>> Staffan
>>
>>> On 15 apr. 2016, at 16:29, Alexander Kulyakhtin <alexander.kulyakhtin at oracle.com> wrote:
>>>
>>> Hi,
>>>
>>> I'm trying to create a jtreg test which compiles and then executes a java class with the -agentlib option (to test some JVMTI functionality)
>>>
>>> In my test I have
>>>
>>> @compile MyTest.java
>>> @run main/othervm -agentlib:mylib MyTest
>>>
>>> I run the test with:
>>>
>>> jtreg -nativepath:<path to libmylib.so> MyTest
>>>
>>> However, it fails with:
>>>
>>> "Could not find agent library mylib on the library path, libmylib.so: cannot open shared object file: No such file or directory"
>>>
>>> The -nativepath does provide for the successful loading of the library when I use System.loadLibrary("mylib").
>>> However, for the -agentlib option, it does not help.
>>>
>>> Does someone know if it is possible to specify the library path for the -agentlib option, from within a jtreg test or using the jtreg options?
>>>
>>> Thank you very much for your help.
>>>
>>> Best regards,
>>> Alexander
>>>