[Tinyos-devel] stack depth checking

[John Regehr]

I have checked a stack depth estimator into CVS.

You can run it directly like this:

   tinyos-2.x/tools/tinyos/safe/tos-ramsize platform elf-file

Alternatively, run "make install" in the tools directory and then invoke 
the stack checker from the makefile like this:

   make platform stack-check

Example output is provided below.  According to this estimate, 
MultihopOscilloscope on MicaZ has only 73 bytes of buffer space between the 
maximum stack depth and the static memory segments.

Limitations (to be addressed soon, hopefully):
   - only AVR platforms supported
   - no documentation
   - TOSThreads not supported

Feedback is appreciated.

John Regehr




[regehr at babel MultihopOscilloscope]$ make micaz stack-check
mkdir -p build/micaz
     compiling MultihopOscilloscopeAppC to a micaz binary
ncc -o build/micaz/main.exe  -Os -fnesc-separator=__ -Wall -Wshadow 
-Wnesc-all -target=micaz -fnesc-cfile=build/micaz/app.c -board=micasb 
-DDEFINED_TOS_AM_GROUP=0x22 --param max-inline-insns-single=100000 
-I/home/regehr/z/tinyos-2.x/tos/lib/net/ 
-I/home/regehr/z/tinyos-2.x/tos/lib/net/ctp 
-I/home/regehr/z/tinyos-2.x/tos/lib/net/4bitle 
-DIDENT_APPNAME=\"MultihopOscillo\" -DIDENT_USERNAME=\"regehr\" 
-DIDENT_HOSTNAME=\"babel\" -DIDENT_USERHASH=0xaa57ee96L 
-DIDENT_TIMESTAMP=0x49dfcce5L -DIDENT_UIDHASH=0xaf618fc1L 
-fnesc-dump=wiring -fnesc-dump='interfaces(!abstract())' 
-fnesc-dump='referenced(interfacedefs, components)' 
-fnesc-dumpfile=build/micaz/wiring-check.xml MultihopOscilloscopeAppC.nc -lm
/home/regehr/z/tinyos-2.x/tos/chips/cc2420/lpl/DummyLplC.nc:39:2: warning: 
#warning "*** LOW POWER COMMUNICATIONS DISABLED ***"

BSS segment size is 3421, data segment size is 24
The upper bound on stack size is 578
The upper bound on RAM usage is 4023
There are 73 unused bytes of RAM

     compiled MultihopOscilloscopeAppC to build/micaz/main.exe
            25458 bytes in ROM
             3445 bytes in RAM
avr-objcopy --output-target=srec build/micaz/main.exe build/micaz/main.srec
avr-objcopy --output-target=ihex build/micaz/main.exe build/micaz/main.ihex
     writing TOS image
[regehr at babel MultihopOscilloscope]$