svn commit: r189707 - in head: sys/kern sys/sys usr.bin/kdump usr.bin/ktrace

[John Baldwin]

On Wednesday 11 March 2009 5:48:36 pm John Baldwin wrote:
> Author: jhb
> Date: Wed Mar 11 21:48:36 2009
> New Revision: 189707
> URL: http://svn.freebsd.org/changeset/base/189707
> 
> Log:
>   Add a new type of KTRACE record for sysctl(3) invocations.  It uses the
>   internal sysctl_sysctl_name() handler to map the MIB array to a string
>   name and logs this name in the trace log.  This can be useful to see
>   exactly which sysctls a thread is invoking.
>   
>   MFC after:	1 month

Sample output below:

   884 ktrace   CALL  execve(0x7fffffffe3a0,0x7fffffffe990,0x7fffffffe9a0)
   884 ktrace   NAMI  "/bin/sh"
   884 ktrace   NAMI  "/libexec/ld-elf.so.1"
   884 sh       RET   execve 0
   884 sh       CALL  __sysctl(0x7fffffffe580,0x2,0x7fffffffe59c,0x7fffffffe590,0,0)
   884 sh       SCTL  "kern.osreldate"
   884 sh       RET   __sysctl 0
   884 sh       CALL  mmap(0,0x240,PROT_READ|PROT_WRITE,MAP_ANON,0xffffffff,0)
   884 sh       RET   mmap 5513216/0x800542000

Some of the sysctl's from a simple ps:

   935 ps       SCTL  "kern.proc.uid.1059"
   935 ps       SCTL  "kern.proc.uid.1059"
   935 ps       SCTL  "sysctl.name2oid"
   935 ps       SCTL  "kern.ccpu"
   935 ps       SCTL  "sysctl.name2oid"
   935 ps       SCTL  "kern.fscale"
   935 ps       SCTL  "sysctl.name2oid"
   935 ps       SCTL  "hw.availpages"
   935 ps       SCTL  "sysctl.name2oid"
   935 ps       SCTL  "kern.ps_arg_cache_limit"
   935 ps       SCTL  "kern.proc.args.935"
   935 ps       SCTL  "kern.argmax"
   935 ps       SCTL  "kern.proc.args.854"

-- 
John Baldwin