RFR: 8039995: Test serviceability/sa/jmap-hashcode/Test8028623.java fails on some Linux/Mac machines.

[KEVIN WALLS]

...and an update to the webrev in the same place that also checks the 
SELinux deny_ptrace flag, another reason you can get a permission denied 
error and fail the test.

http://cr.openjdk.java.net/~kevinw/8039995/webrev.01/

Thanks
Kevin


On 20/11/2014 18:38, KEVIN WALLS wrote:
> Hi,
>
> I'm resurrecting this thread to revisit this testcase, the one that 
> fails if not in an environment where an SA attach is permitted (which 
> is linux systems with 1 in /proc/sys/kernel/yama/ptrace_scope, and mac 
> systems as a non-root user).
>
> There are times when we want to check if an SA attach is likely to 
> work, so in the following webrev I've put that in the testlibrary.
>
> In doing this I now realise that heap dumping with jmap/sa is broken, 
> as reported in: https://bugs.openjdk.java.net/browse/JDK-8044416
>
> I won't remove the @ignore in this change, but it would make sense to 
> me to do the fix below, including backporting to places where jmap -F 
> still works.
>
> webrev
> http://cr.openjdk.java.net/~kevinw/8039995/webrev.01/
>
> bug
> https://bugs.openjdk.java.net/browse/JDK-8039995
>
> Thanks
> Kevin
>
>
>
>
> On 24/05/2014 19:25, Kevin Walls wrote:
>>
>> Thanks Peter, and thanks Dmitry -
>>
>> So another thread on this has started about why such a test runs in 
>> an environment that can't expected to attach to its own processes 
>> anyway: seems that some test systems permit that, and some run as a 
>> user that can't necessarily expect to have that ability.
>>
>> (Dmitry I'm not sure about exiting with that error value?  If that's 
>> something people are meant to know about I have missed it. But the 
>> test would fail if jmap didn't create the heap dump file, i.e. if it 
>> fails but doesn't exit with the right code.)
>>
>> For the moment I'll wait on that other information for whether this 
>> needs to be fixed in the test...
>>
>> Thanks!
>> Kevin
>>
>>
>>
>>
>> On 23/05/14 12:00, Peter Allwin wrote:
>>> Looks good to me!
>>>
>>>
>>> Thanks for looking at this Kevin,
>>> /peter
>>>
>>> On 20 May 2014, at 13:14, Kevin Walls <kevin.walls at oracle.com> wrote:
>>>
>>>> Hi - any comments? 8-)
>>>>
>>>> On 12/05/14 16:02, Kevin Walls wrote
>>>>> Hi,
>>>>>
>>>>> I'd like to get a review of this test change.  It assumed that 
>>>>> jmap would have permission to run on a process that the test 
>>>>> itself created, but this is not necessarily the case.
>>>>>
>>>>> Here I'm considering it OK to skip (pass) the test where jmap 
>>>>> fails to attach.  The test itself was not platform-specific and as 
>>>>> long as we have other platforms where jmap step will work, we are 
>>>>> testing for this problem.
>>>>>
>>>>> bug:
>>>>> https://bugs.openjdk.java.net/browse/JDK-8039995
>>>>>
>>>>> webrev:
>>>>> http://cr.openjdk.java.net/~kevinw/8039995/webrev.00/
>>>>>
>>>>> Thanks
>>>>> Kevin
>>
>