The following are examples of pl_syscalls.d.

This is a simple script to count executed Perl subroutines and system calls.

Here it traces an example program, Code/Perl/func_abc.pl.

# pl_syscalls.d -c ./func_abc.pl

Function A

Tracing... Hit Ctrl-C to end.

Function B

Function C

Calls for PID 305173,

FILE TYPE NAME COUNT

func_abc.pl sub func_a 1

func_abc.pl sub func_b 1

func_abc.pl sub func_c 1

func_abc.pl syscall fcntl 1

func_abc.pl syscall getrlimit 1

func_abc.pl syscall mmap 1

func_abc.pl syscall munmap 1

func_abc.pl syscall rexit 1

func_abc.pl syscall schedctl 1

func_abc.pl syscall sigpending 1

func_abc.pl syscall sysi86 1

func_abc.pl syscall getgid 2

func_abc.pl syscall getpid 2

func_abc.pl syscall getuid 2

func_abc.pl syscall sigaction 2

func_abc.pl syscall sysconfig 2

func_abc.pl syscall fstat64 3

func_abc.pl syscall nanosleep 3

func_abc.pl syscall read 3

func_abc.pl syscall setcontext 3

func_abc.pl syscall write 3

func_abc.pl syscall close 4

func_abc.pl syscall ioctl 4

func_abc.pl syscall open64 4

func_abc.pl syscall llseek 5

func_abc.pl syscall gtime 7

func_abc.pl syscall brk 20

While tracing, three subroutines were called - func_a(), func_b() and func_c().

There were numerous system calls made, including 20 brk()'s, 7 gtime()'s

and 5 llseek()'s.

This script can provide an insight to how an application is interacting

with the system, by providing both application subroutine calls and

system calls in the same output.