strace -f or -F on a uClinux system

[Sol Kavy]

I am trying to understand the limitations of using strace on a uClinux
system.

Ubicom is a semi-conductor company with a mutli-threaded CPU design
using a custom ISA.   We have recently ported and released uClinux
running on our processors.

We have a port of strace to the platform.  However, strace hangs when
using the -f or -F options.  

strace launches the child (rygel in this case) but is unable to follow
the vfork() and clones() that follow.  The system winds up in a state
when strace is sleeping, the child is in a tracing stop state and "it's
children" are all zombies.

Any information regarding strace's ability to follow children in a NOMMU
config is greatly appreciated.

Sol Kavy


-- 
Sol Kavy <skavy at ubicom.com>
Ubicom, Inc.