The following are examples of sh_syscalls.d.

This is a simple script to count Ruby methods and system calls. Here we trace

an example program - Code/Ruby/func_abc.rb

# rb_syscalls.d -c ./func_abc.rb

Tracing... Hit Ctrl-C to end.

Function A

Function B

Function C

Calls for PID 146493,

FILE TYPE NAME COUNT

func_abc.rb method Object::func_a 1

func_abc.rb method Object::func_b 1

func_abc.rb method Object::func_c 1

func_abc.rb syscall getpid 1

func_abc.rb syscall getrlimit 1

func_abc.rb syscall getrlimit64 1

func_abc.rb syscall mmap 1

func_abc.rb syscall munmap 1

func_abc.rb syscall rexit 1

func_abc.rb syscall schedctl 1

func_abc.rb syscall sigpending 1

func_abc.rb syscall sysconfig 1

func_abc.rb syscall sysi86 1

func_abc.rb syscall write 1

func_abc.rb syscall llseek 2

func_abc.rb syscall read 2

func_abc.rb syscall setcontext 2

func_abc.rb method IO::write 3

func_abc.rb method Module::method_added 3

func_abc.rb method Object::print 3

func_abc.rb method Object::sleep 3

func_abc.rb syscall fstat64 3

func_abc.rb syscall getgid 3

func_abc.rb syscall getuid 3

func_abc.rb syscall ioctl 3

func_abc.rb syscall pollsys 3

func_abc.rb syscall close 4

func_abc.rb syscall lwp_sigmask 4

func_abc.rb syscall open64 4

func_abc.rb syscall gtime 6

func_abc.rb syscall sigaction 12

func_abc.rb syscall brk 56

While tracing, three user-defined functions were called - func_a, func_b and

func_c. There were 3 instances of the IO::write method being called. There

were also many system calls made, including 56 brk()'s, and 12 sigaction()'s.

This script can provide an insight to how a Ruby program is interacting

with the system, by providing methods and system calls in the same output.