[GSoC] libmm project status

[Hesham Moustafa]

On Tue, Jul 9, 2013 at 6:47 PM, Rempel, Cynthia <cynt6007 at vandals.uidaho.edu
> wrote:

> >>Is there a way to conditionally build the mmtests based on whether libmm
> is being built?
> >>My initial thought is something like an AM_CONDITIONAL
> >>
> http://www.gnu.org/software/automake/manual/html_node/Subdirectories-with-AM_005fCONDITIONAL.html
> >>Although another way to conditionally build the tests may be better...
> >>
> >>Ideally if we went that route (and if feasible), if there was a
> conditional being used for building libmm, we would use the same
> conditional for the libmm tests...
> >Sure, I can work on that.
> Thanks!
> My main concern is if a BSP doesn't have libmm built, will building all
> the tests lead to a compiler / linker error?
> If not, we needn't worry about building conditionally...

There are stubs for libmm functions at a high-level APIs at
no_memorymanagement.c file. So, every BSP/CPU that does not implement libmm
functions can be built without error with including that file.

>


>
I'm mostly worried about getting these tests committed incrementally if
> feasible (i.e. they don't break the build)...
>
> Hopefully we can get your work committed over the summer and reduce the
> number of patches at the end of the summer :)
>
> ---
>
> I noticed there wasn't a copyright on the .doc s. Could you add
>
> #  COPYRIGHT (c) 2013.
> #  Hesham Moustafa.
> #
> #  The license and distribution terms for this file may be
> #  found in the file LICENSE in this distribution or at
> #  http://www.rtems.com/license/LICENSE.
>
> To the top of
> mmtest1/mmtest1.doc
> mmtest2/mmtest2.doc
> mmtest3/mmtest3.doc
>
> Thanks!
> Cindy
> ________________________________________
> From: rtems-devel-bounces at rtems.org<mailto:rtems-devel-bounces at rtems.org>
> [rtems-devel-bounces at rtems.org<mailto:rtems-devel-bounces at rtems.org>] on
> behalf of Rempel, Cynthia [cynt6007 at vandals.uidaho.edu<mailto:
> cynt6007 at vandals.uidaho.edu>]
> Sent: Monday, July 08, 2013 3:55 PM
> To: Hesham Moustafa; rtems-devel at rtems.org<mailto:rtems-devel at rtems.org>
> Cc: Gedare Bloom
> Subject: RE: [GSoC] libmm project status
>
> Hi,
>
> Thanks for providing the link directly to the testcases!
> Could you copy the information about each test into:
>
> mmtest1/mmtest1.doc
> Simple tests that tries to install memory management entries
>
> mmtest2/mmtest2.doc
> + Install entries with specific memory attributes (e.g read only region) :
> + Check for memory protection violations (writing to read only blocks)
> + Reading from read only blocks.
> + Write/Read to/from unmapped region (error!).
> + Write to a valid entry that was installed and then uninstalled (error!).
>
> mmtest3/mmtest3.doc
> + Tests for libmm behavior on SMP environments.
> + Create tasks for each core and start it.
> + Check for memory consistency and page tables and memory attributes
> validity.
>
> That way we can quickly identify what each test does in 5 years... Good
> job with the documentation :)
>
> Cindy
> ________________________________________
> From: rtems-devel-bounces at rtems.org<mailto:rtems-devel-bounces at rtems.org>
> [rtems-devel-bounces at rtems.org<mailto:rtems-devel-bounces at rtems.org>] on
> behalf of Hesham Moustafa [heshamelmatary at gmail.com<mailto:
> heshamelmatary at gmail.com>]
> Sent: Monday, July 08, 2013 3:39 PM
> To: rtems-devel at rtems.org<mailto:rtems-devel at rtems.org>
> Cc: Gedare Bloom
> Subject: [GSoC] libmm project status
>
> Hi all,
>
> I have posted a new thread to my blog that contains a brief introduction
> to libmm and latest updates, here is the thread [1] Please take a look.
>
> TODO: port libmm for Raspberry PI board on real hardware.
>
> Questions :
>
> I have created a new test case at libtests called mmtest3 [2] which
> simulate SMP use case on QEMU/Realview. It simply tries to invoke the same
> task (which calls libmm function) for each core. There is a fatal error at
> startup that branches to data exception handler but I am not sure why.
> Please take a look and tell me if I am doing something wrong with that test
> case.
>
> Other test cases (mmtest1, mmtest2) run successfully on the same platform.
>
> [1]
> http://heshamelmatary.blogspot.com/2013/07/gsoc-2013-libmm-for-rtems.html
> [2]
> https://github.com/heshamelmatary/rtems-gsoc2013/tree/low-level-libmm/testsuites/libtests/mmtest3
>
> Regards,
> Hesham
>
>
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>
>
>
>
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