DTrace: correct me, if I'm wrong

[alp]

I've just found out, why I got something like

/usr/lib/dtrace/psinfo.d", line 37: syntax error near "uid_t"

I had following options in config (on i386):

options KDTRACE_HOOKS
options DDB_CTG

But without

makeoptions DEBUG=-g

I received the mentioned above error trying to run any dtrace script (on anything from 7.1 to 9-current). I checked, kernel had ctf info (ctdump showed a lot), but it didn't show uid_t symbol.

I haven't found any mentions about this in Handbook. Correct me, please, if I'm wrong and this is mentioned somewhere or this behavior is not related to this option.

 

[Zhwazi]

Are you trying to trace the kernel or something in userland? Userland DTrace isn't supported yet but it's expected very soon. I got the exact same error when trying to run DTrace scripts. I believe that is the reason why.

 

[alp]

Are you trying to trace the kernel or something in userland? Userland DTrace isn't supported yet but it's expected very soon. I got the exact same error when trying to run DTrace scripts. I believe that is the reason why.

I was trying to trace syscall:::open:entry. So it seems to be not related to userland DTrace support.

 

[f-andrey]

I also had this error. I think amd64.

Now dtrace work OK

kernel
> options 	KDTRACE_FRAME		# Ensure frames are compiled in
> options 	KDTRACE_HOOKS		# Kernel DTrace hooks
# uname -a
FreeBSD my_book 9.0-CURRENT FreeBSD 9.0-CURRENT #1 r210171: Sat Jul 17 10:36:58 MSD 2010
andrey@my_book:/usr/obj/home/andrey/src_head/sys/MY_BOOK  amd64
my_book# kldstat | grep dtrace
 6    1 0xffffffff81242000 20b8     dtraceall.ko
 9    9 0xffffffff81253000 15b960   dtrace.ko

# dtrace -n ":::open:entry" | head -5
dtrace: description ':::open:entry' matched 2 probes
CPU     ID                    FUNCTION:NAME
  1     27                       open:entry 
  1  36912                       open:entry 
  1     27                       open:entry 
  1  36912                       open:entry

syscall probe maybe not

# dtrace -n "syscall::::" | head -5
dtrace: invalid probe specifier syscall::::: invalid probe description "syscall::::": Overspecified probe description