The following are examples of sh_syscalls.d. This is a simple script to count Tcl commands, procedures and system calls. Here we trace an example program - Code/Tcl/func_abc.tcl. # tcl_syscalls.d -c './tclsh func_abc.tcl ' Tracing... Hit Ctrl-C to end. Function A Function B Function C PID TYPE NAME COUNT 16580 cmd concat 1 16580 cmd exit 1 16580 cmd func_a 1 16580 cmd func_b 1 16580 cmd func_c 1 16580 cmd list 1 16580 cmd rename 1 16580 cmd source 1 16580 cmd tclInit 1 16580 cmd unset 1 16580 cmd uplevel 1 16580 cmd variable 1 16580 proc func_a 1 16580 proc func_b 1 16580 proc func_c 1 16580 proc tclInit 1 16580 syscall getpid 1 16580 syscall getrlimit 1 16580 syscall mmap 1 16580 syscall munmap 1 16580 syscall rexit 1 16580 syscall sigaction 1 16580 syscall sigpending 1 16580 syscall sysi86 1 16580 syscall uname 1 16580 cmd foreach 2 16580 cmd global 2 16580 cmd interp 2 16580 cmd package 2 16580 cmd set 2 16580 syscall setcontext 2 16580 syscall stat64 2 16580 syscall sysconfig 2 16580 cmd after 3 16580 cmd namespace 3 16580 cmd puts 3 16580 syscall pollsys 3 16580 syscall write 3 16580 cmd lappend 4 16580 cmd lsearch 4 16580 syscall close 5 16580 syscall llseek 6 16580 cmd if 8 16580 cmd info 11 16580 syscall read 11 16580 cmd file 12 16580 cmd proc 12 16580 syscall fcntl 12 16580 syscall ioctl 12 16580 syscall open64 14 16580 syscall resolvepath 25 16580 syscall brk 27 16580 syscall access 54