Hi, I'll try to be more specific. I studied a little about gcov. I saw that GCC instrumentate the program *edges* to get the code coverage. So... - The instrumentator uses any technique to reduce the amount of instrumentation points, for example, dominance? - I know that the instrumentation is done at compile time. However, it is done in C code or in compiled code ? - What commands runs when the probes are executed? The probes calls some function in lib? What? Now I'd want to know more about the sources that I have identified as part of gcov: - coverage.c: I do not know. - gcov: It is responsible for generating the file. gcov? - profile: - gcov-io: Responsible for reading and writing files. gcda and. gcno? - libgcov: library that supports the execution of the instrumented program? - tree-profile.c: insert the probes in code? Which of these files are used during compile? And which of these files are used during program execution? I don't know if I could be more specific. Sorry if I'm bothering. Best regards, Harry 2011/4/5 Ian Lance Taylor <iant@xxxxxxxxxx> > > Harry Trinta <harrytpc@xxxxxxxxx> writes: > > > My name is Harry and I've been doing my master's degree at USP > > (Universidade de São Paulo) here in Brazil. My thesis will address > > about applying structural tests for embedded systems. > > Then, for now, my activity is study and understand how the gcov works > > (internally). I've never studied about it before, and I'm having some > > problems. > > I' have been researching on the Internet about the subject but I > > couldn't find anything helpful, and so, I decided to contact you guys. > > I saw that on GCC there are several sources related to the gcov: > > - coverage > > - gcov > > - profile > > - gcov-io > > - libgcov > > > > I don't understand how each one works and what are their responsibilities. > > I need understand which function starts the Gcov process. Moreover, i > > need to know which source is responsible for instrumenting the code.. > > and others things. > > In short: I need to understand the internal behavior of gcov. > > It's hard to answer general questions. It's much easier to answer > specific questions. So, ask specific questions. > > I don't know what you mean by asking which function starts the gcov > process. > > The instrumentation code is inserted by code in gcc/tree-profile.c. > > Ian
