how to debug ns2 code using gdb or ddd
Thanks to SamanaSrikanth and ameya. I found this on
orkut.
May be Pedro Estrela Should add this to his C++
debugging.
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ns - debug
how to debug ns2 code using gdb or ddd?
ok, so to enable debug information in ns, you need to
do the following:
in your ns-allinone directory, edit the install file.
Look for the line :
# Build Tcl8.3.2 (should be around line 173)
In this section you need to add the option
--enable-symbols to the line :
./configure --enable-gcc --disable-shared
--prefix=$CUR_PATH || ....
so it becomes:
./configure --enable-gcc --enable-symbols
--disable-shared --prefix=$CUR_PATH || ....
Now, still in the ns-allinone/install file, look for
the tclcl section.
# Build tclcl (should be around line 260)
in this section, you need to add --enable-debug to
your configure line, such
that:
./configure || ...
becomes
./configure --enable-debug || ...
ok, we're done with this one. save and close.
now, go into your ns-allinone/ns directory, and open
your Makefile.in. Search
for CFLAGS (should be around line 90), and change it
from
CFLAGS = $(CCOPT) $(DEFINE)
to
CFLAGS = -g $(CCOPT) $(DEFINE)
ok, we're done with the editing. now go to your
ns-allinone and type
./install.
after everything is done, you should have debugging
symbols enabled. so, now
you recompile your code into ns, and open ns in gdb
(gdb ns) and set the
appropriate parameters to ns (e.g. your .tcl
simulation file), and type run.
When the app crashes, type bt to see the stack. you
should see plenty of debug
information now.
let me know how it goes.
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the way I prefer the most is just add the -g flag
information in the make file.
That should add the debug symbols and then while
running do following
>> ddd ns
once ur in graphical debugger,
say
>>set args filename (& any other args)
>> run example.tcl
that should give you a good graphical display of your
code. debugging becomes easy and faster
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