I just need to see what is stored, in realtime, in some particular variables and struct used by an application written in C.I need something like the stack tracer that comes with the ADT plugins for Eclipse as part of the Android sdk.
Tool to visualize values from variables during the execution of a program in C
c;variables;stack
If I understand correctly you just need to use a debugger.  If you compiled with gcc then you can use gdb.  You will want to add the -g -O0 flags to include debugging symbols and turn off optimization.  If you need to you can even attach gdb to a running process.  I know microsoft has a similar debugger I'm just not familiar with it.