Segmenation fault for systemtap tests using the arm uprobes support

[William Cohen]

On 11/06/2013 10:57 AM, David Long wrote:
> On 11/06/13 10:24, William Cohen wrote:
>>
>> Hi David,
>>
>> With the uprobe-v2 version I only saw one test that appeared to fail because of a sigsegv:
>>
> 
> Are you testing on the same hardware?  It's conceivable that could make a difference, especially if the number of CPU's is different.
> 

Hi David,

I am using the same machine for all the kernels, a samsung ARM chromebook.  It is the fastest ARM-based machine I have access to.  It does have 2 processor.  I am compiling the kernel with SMP support.  One thing that is different betweenthe kernels is that the newer uprobes-v2 version was compiled without LPAE or KVM support.  Would those configure options make any difference in results?

>>
>> When searching for ways to test uprobes support I cam across https://github.com/rabinv/uprobes-test . Are these tests useful or have they been orphaned?
>>
> 
> Yes, they are very useful.  I run them all the time.  Note there are some expected failures late in the run, also apparently these tests do not test uretprobes.
> 
> -dl

Great to hear that the tests are being used to exercise the kprobes.  The tests haven't changed in 9 months, so I wasn't sure if they were being used.

-Will