RE: [ECOS] building and debugging

RE: [ECOS] building and debugging

[Laurie Gellatly]

Hi Carlos,
Just before you sent this message I found the problem.
Yes, you're right with the fix.
Appreciate your reply.

Thanks			...Laurie:{)

-----Original Message-----
From: Carlos Losada [mailto:itel9cl1@yahoo.com]
Sent: Wednesday, 21 February 2007 7:58 PM
To: Laurie Gellatly
Subject: Re: [ECOS] building and debugging


Laurie I had the same problem with the indexer until I
provided the path to ecos include directory directly.
Try the following:
Eclipse->Project->Properties
C/C++ Build->GCC C Compiler->Directories

Then type in the absolute path to the ecos include
directory.  For example:
C:\cygwin\home\carlos\...\ecos_install\include

Good Luck
Carlos

--- Laurie Gellatly <laurie.gellatly@netic.com> wrote:

> Hi All,
> I've been using eclipse to develop my arm based
> system for some time.
> The application runs multiple threads and I had been
> able to debug them
> reasonably well (the program did not always flow the
> way I expected when
> single stepping and sometimes local variables are
> not able to be displayed).
> What I have now is that although the main thread
> seems to be able to be
> debugged, the other threads have problems.
> I can set a breakpoint in a thread and it will stop,
> but single stepping or
> trying to display local variables etc no longer
> works.
> I've tried various things to fix it including
> reducing the size of the app
> (down to 300K), but without any luck.
>
> Is this a GDB or Eclipse limit or have I had a
> configuration issue?
>
> BTW the indexer has always complained that the
> #include s for the OS files
> could not find yet C does find them.
> Anyone suggest what might be wrong?
>
> Thanks             ...Laurie :{)
>
>
> --
> Before posting, please read the FAQ:
> http://ecos.sourceware.org/fom/ecos
> and search the list archive:
> http://ecos.sourceware.org/ml/ecos-discuss
>
>




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________
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-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Re: [ECOS] building and debugging

[Andrew Lunn]

On Mon, Feb 19, 2007 at 06:22:56PM +1100, Laurie Gellatly wrote:
> Hi All,
> I've been using eclipse to develop my arm based system for some time.
> The application runs multiple threads and I had been able to debug them
> reasonably well (the program did not always flow the way I expected when
> single stepping and sometimes local variables are not able to be displayed).

Try disabling the optimizer, i.e. remove the -O2 flag. It will then
flow in a more logical, but less efficient way.

> What I have now is that although the main thread seems to be able to be
> debugged, the other threads have problems.
> I can set a breakpoint in a thread and it will stop, but single stepping or
> trying to display local variables etc no longer works.

Part of the problem is that gdb is not fully thread aware. It cannot
stop a thread context change at a time slice. It cannot stop a higher
priority thread taking over, it cannot stop a timer tick happening
etc. So when every you do a single step something else can take over
control from the current thread. What you can do is run the thread you
are trying to debug at a higher priority than anything else. That will
reduce the likelihood of it being preempted. However if you are
looking for a race condition this is not going to help you...

        Andrew

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

[ECOS] building and debugging

[Laurie Gellatly]

Hi All,
I've been using eclipse to develop my arm based system for some time.
The application runs multiple threads and I had been able to debug them
reasonably well (the program did not always flow the way I expected when
single stepping and sometimes local variables are not able to be displayed).
What I have now is that although the main thread seems to be able to be
debugged, the other threads have problems.
I can set a breakpoint in a thread and it will stop, but single stepping or
trying to display local variables etc no longer works.
I've tried various things to fix it including reducing the size of the app
(down to 300K), but without any luck.

Is this a GDB or Eclipse limit or have I had a configuration issue?

BTW the indexer has always complained that the #include s for the OS files
could not find yet C does find them.
Anyone suggest what might be wrong?

Thanks             ...Laurie :{)


-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss