How to specity the -agentlib option in a jtreg test?
David DeHaven
david.dehaven at oracle.com
Mon Apr 18 20:44:28 UTC 2016
Mac uses DYLD_LIBRARY_PATH but be warned that 10.11 strips DYLD_xxx variable from the environment in some cases as a security measure. I think it would be ok in this case.
-DrD-
> HI Staffan,
>
> The text specifically describes Windows and Solaris. Should we assume that Mac and Linux also use LD_LIBRARY_PATH.
>
> And, my question still stands: which is the better one to fix: jtreg, or jvmti?
>
> -- Jon
>
> On 04/18/2016 11:07 AM, Staffan Larsen wrote:
>> The JVMTI spec is kind of vague on this point, but does not mention system properties.
>>
>> -agentlib:<agent-lib-name>=<options>
>> The name following -agentlib: is the name of the library to load. Lookup of the library, both its full name and location, proceeds in a platform-specific manner. Typically, the <agent-lib-name> is expanded to an operating system specific file name. The <options> will be passed to the agent on start-up. For example, if the option -agentlib:foo=opt1,opt2 is specified, the VM will attempt to load the shared library foo.dllfrom the system PATH under WindowsTM or libfoo.so from the LD_LIBRARY_PATH under the SolarisTM operating environment. If the agent library is statically linked into the executable then no actual loading takes place.
>>
>> http://docs.oracle.com/javase/8/docs/platform/jvmti/jvmti.html
>>
>>
>>
>>> On 18 apr. 2016, at 19:51, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
>>>
>>> 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
>>>>>>
>>>
>>
>
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