How to specity the -agentlib option in a jtreg test?
Staffan Larsen
staffan.larsen at oracle.com
Tue Apr 19 20:02:17 UTC 2016
I would say nativepath should be prepended, so that we don't accidentally pick up some other library.
Thanks,
Staffan
> On 19 apr. 2016, at 17:15, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
>
> OK,
>
> The one complication from the jtreg side is that the nativepath has to be merged with any externally supplied value on the PATH/LD_LIBRARY_PATH/DYLD_LIBRARY_PATH.
>
> With that complication in mind, should the nativepath be prepended or appending to any existing value on the env variable?
>
> -- Jon
>
>> On 04/19/2016 12:48 AM, Staffan Larsen wrote:
>>
>>> On 18 apr. 2016, at 21:59, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
>>>
>>> HI Staffan,
>>>
>>> The text specifically describes Windows and Solaris. Should we assume that Mac and Linux also use LD_LIBRARY_PATH.
>>
>> As David said, Mac uses DYLD_LIBRARY_PATH.
>>
>>> And, my question still stands: which is the better one to fix: jtreg, or jvmti?
>>
>> I think the fix needs to be in jtreg.
>>
>> /Staffan
>>
>>>
>>> -- 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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