cddl/contrib/dtracetoolkit/Examples/sh_syscalls_example.txt

   1 The following are examples of sh_syscalls.d.
   2
   3 This is a simple script to count Shell functions, built-ins, external command
   4 executions and system calls.  Here we trace an example program -
   5 Code/Shell/func_abc.sh.
   6
   7 # sh_syscalls.d -c ./func_abc.sh -o /tmp/out
   8 Function A
   9 Function B
  10 Function C
  11
  12 # cat /tmp/out
  13 Tracing... Hit Ctrl-C to end.
  14
  15 Calls for PID 12966,
  16
  17  FILE                             TYPE       NAME                      COUNT
  18  func_abc.sh                      func       func_a                        1
  19  func_abc.sh                      func       func_b                        1
  20  func_abc.sh                      func       func_c                        1
  21  func_abc.sh                      syscall    getrlimit                     1
  22  func_abc.sh                      syscall    mmap                          1
  23  func_abc.sh                      syscall    munmap                        1
  24  func_abc.sh                      syscall    rexit                         1
  25  func_abc.sh                      syscall    schedctl                      1
  26  func_abc.sh                      syscall    sigaltstack                   1
  27  func_abc.sh                      syscall    stat64                        1
  28  func_abc.sh                      syscall    sysi86                        1
  29  func_abc.sh                      syscall    access                        2
  30  func_abc.sh                      syscall    fcntl                         2
  31  func_abc.sh                      syscall    getgid                        2
  32  func_abc.sh                      syscall    getpid                        2
  33  func_abc.sh                      syscall    setcontext                    2
  34  func_abc.sh                      syscall    sysconfig                     2
  35  func_abc.sh                      builtin    echo                          3
  36  func_abc.sh                      cmd        sleep                         3
  37  func_abc.sh                      syscall    fork1                         3
  38  func_abc.sh                      syscall    getuid                        3
  39  func_abc.sh                      syscall    lwp_sigmask                   3
  40  func_abc.sh                      syscall    open64                        3
  41  func_abc.sh                      syscall    read                          3
  42  func_abc.sh                      syscall    write                         3
  43  func_abc.sh                      syscall    close                         5
  44  func_abc.sh                      syscall    setpgrp                       5
  45  func_abc.sh                      syscall    waitsys                       6
  46  func_abc.sh                      syscall    brk                           9
  47  func_abc.sh                      syscall    ioctl                        15
  48  func_abc.sh                      syscall    sigaction                    53
  49
  50 While tracing, three functions were called - func_a(), func_b() and
  51 func_c().  There were 3 instances of the shell built-in 'echo' being called,
  52 and 3 executions of the sleep command (which is probably /usr/bin/sleep - use
  53 the syscall provider to confirm). There were numerous system calls made,
  54 including 9 brk()'s, 15 ioctl()'s and 53 sigaction()'s.
  55
  56 This script can provide an insight to how a script is interacting
  57 with the system, by providing function calls, commands, built-ins and system
  58 calls in the same output.
  59