On Wed, Feb 15, 2012 at 4:38 PM, Swapnil Gaikwad <swapnilgaik72@xxxxxxxxx> wrote: > Can we see trace of how the system call works? > What are the functions are called in kernel space? > For example we want to trace cp command. Then what are the functions > is get called by that in kernel space? like how the inode allocation > take place for new destination file etc. > Is any tool for that? I think strace [0][1] is what you are looking for. "strace executable" will list all the system calls made by the executable during runtime (you can filter what calls you want traced). A syscall is by definition a "function" that is ran in kernel space, called by the userspace. If you want to see what function is called when there's a certain syscall, you should take a look at the syscall descriptor table. It's an array for function pointers. You can talke a look at the kernel' source code to see the implementation of the syscall. Now, to track what the kernel is doing, while in a syscall, I can't remember a tool that would do that... maybe somebody else can help. [0] http://linux.die.net/man/1/strace [1] http://en.wikipedia.org/wiki/Strace -- Alexandru Juncu ROSEdu _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
