[En-Nut-Discussion] Large auto variable called from main thread crashed programm
bon at elektron.ikp.physik.tu-darmstadt.de
Fri Jan 9 14:33:42 CET 2015
>>>>> "Philipp" == Philipp Burch <phip at hb9etc.ch> writes:
Philipp> Well, the most obvious thing would be an overflow of the main
Philipp> thread's stack. Have you enabled the stack checking code to see
Philipp> how much is actually used when you run it with the smaller
Philipp> Some other thing that comes to my mind is a stack-hungry
Philipp> interrupt service routine. I'm still not sure which stack is
Philipp> actually used for ISRs, but it may be the one used for the
Philipp> currently executing thread. So if you have complex ISRs, that
Philipp> may cause some more random crashes.
Philipp> Since the STM32 is also a Cortex-M3/4 processor, you could
Philipp> probably also use the post-mortem stack checking code. It is an
Philipp> extension to Oles Cortex debug macro and can be found in r5891
Philipp> in the devnut_tiva branch.
Reading enmem21e.pdf and arch/cm3/os/nutinit.c
#define NUT_THREAD_MAINSTACK 1024
make things clear: Main stack is only for idle thread, main program stack as
thread stack is allocated in pre-defined size from heap.
To cite enmen21e:
> To avoid wasting stack space, the application should...
> ...not declare large non-static arrays or structures within functions.
Uwe Bonnes bon at elektron.ikp.physik.tu-darmstadt.de
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
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