On 2013-07-29, ravim <ravi.mandl...@gmail.com> wrote:
> My apologies if I am asking something irrelevant to this forum. We are using
> mspgcc and mspdebug for our project. We are facing some issues with what we
> assume might be stack overflow. The timer interrupts stops working after
> around 2 hours, however device still receives packets. Also, when we reset
> the device after timer gets stuck, they never turn back on unless we
> re-install the code. We are trying to debug.
>
> I wanted to know if there is any possible way we can know the size of
> global variables in the binary?
Not easily, no.
It's pretty easy to find the total size of non-automatic initalized
variables (section .data) and total size of non-automatic
uninitialized variables (.bss) by looking at a linker map file or by
using the "size" or "objdump" commands on the linked ELF file.
You can generate a linker file by passing the "-Map <mapfilename>"
option to the linker. If you are using the "gcc" binary to do the
linking, then you can tell it to pass an option on to the linker by
using the -Wl option:
gcc -Wl,-Map,foo.map -o foo.elf file1.o file2.o file3.o
However, I'm not aware of a simple way to find the sizes of only the
_global_ variables and not include local variables that have a static
storage class (The .bss and .data sections include both global and
local variables).
> This will help us narrow down a few specifics. We know there is
> something in TinyOs when we make, it let us know size of global
> variables, we are looking for something similar in mspdebug.
Why mspdebug?
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