[petsc-dev] call stack

Hi all I'm interested in using PETSC with CUDA. I just downloaded and installed the developer version and I was testing the example #1 ($HOME/petsc-dev/src/vec/vec/examples/tutorials) to compute the norm of a vector. I would like to compare PETSC "without cuda" and "with cuda". Is there a way to profile a PETSC executable, obtain the stack of the called functions and methods and access to the function body? Can anybody make an exmple? Thanks a million