functracer fails to run on Panda

[Avik Sil]

maemo functracer tool fails to run on Panda:

# functracer -r -s uname
version=2.0, arch=armv7l, timestamp=24.08.2011 11:23:41, process=uname, pid=1364, backtrace depth=10, origin=functracer 1.2.1,
<1> : memory (memory allocation in bytes)
Process/Thread 1364 (uname) was created
functracer: ssol.c:89: syscall_remote: Assertion `ret == proc->pid && ((((__extension__ (((union { __typeof(status) __in; int __i; }) { .__in = (status) }).__i))) & 0xff) == 0x.
Aborted

[Eero Tamminen (oak-helsinkinet)]

Siarhei had a Panda board with Gentoo where he could reproduce and fix this issue[1]. The new Functracer v1.4 release has now proper Thumb2 support:
  http://maemo.gitorious.org/maemo-tools/functracer

Could you test that Functracer works now fine also with Ubuntu ARM?

[1] The issue was completely broken Thumb instruction set support. Functracer originates from Maemo & MeeGo/Harmattan which don't build for Thumb instruction set like Ubuntu does, so Functracer's preliminary Thumb support was besides broken, also completely untested.

[Fathi Boudra (fboudra)]

It requires libunwind, which isn't built on Ubuntu Precise/ARMHF.

[Avik Sil (aviksil)]

libunwind is not available for armel/armhf

[Fathi Boudra (fboudra)]

Set importance to wishlist. We need to make libunwind available in our PPA and then retry functracer.

[Eero Tamminen (oak-helsinkinet)]

> It requires libunwind, which isn't built on Ubuntu Precise/ARMHF.
...
> libunwind is not available for armel/armhf

Debian has an ancient v0.99 libunwind version, which doesn't support ARM.

You need to update the code in the Debian package to a newer libunwind release:
  https://savannah.nongnu.org/news/?group=libunwind

Which do have proper ARM support.

> We need to make libunwind available in our PPA and then retry functracer.

Functracer sources contain a dejagnu based testsuite for checking that catching the function calls and the basic functionality works.

[Riku Voipio (riku-voipio)]

I've verified this fixed with the Functracer 1.4 just pushed to linaro overlay ppa:

https://launchpad.net/~linaro-maintainers/+archive/overlay/

sp-rtrace and libunwind was updated at the same time.