DTrace boken in FreeBSD 10.3 Stable
Andreas Longwitz
longwitz at incore.de
Wed May 10 16:14:25 UTC 2017
Thanks for answer,
> These error messages suggest that the kernel was built without CTF
> data. Did you build and install the kernel yourself? If so, I'd
> recommend rerunning make buildkernel with "WITH_CTF=1" added to the
> commandline.
I did a complete clean (empty /usr/obj) buildworld and buildkernel. I
think WITH_CTF=1 is default in 10.3, the log of my buildkernel gives
echo $(grep WITH_CTF=\"1\" buildkernel.log | wc -l ) --> 8.
I agree, the problem is correlated with CTF, but only for some functions
of the MODULES freebsd and freebsd32.
A snippet from the output of "dtrace -l" looks like this:
39180 syscall freebsd32 getdtablesize return
39181 syscall freebsd32 dup2 entry
39182 syscall freebsd32 dup2 return
39183 syscall freebsd32 #91 entry
39184 syscall freebsd32 #91 return
39185 syscall freebsd32 freebsd32_fcntl entry
39186 syscall freebsd32 freebsd32_fcntl return
39187 syscall freebsd32 freebsd32_select entry
39188 syscall freebsd32 freebsd32_select return
39189 syscall freebsd32 #94 entry
39190 syscall freebsd32 #94 return
39191 syscall freebsd32 fsync entry
39192 syscall freebsd32 fsync return
The function names are missing only for MODULE freebsd or freebsd32:
dtrace -l | grep '#' | wc -l -- > 350
dtrace -l | grep '#' | grep freebsd32 | wc -l --> 196
dtrace -l | grep '#' | grep 'freebsd ' | wc -l --> 154
The kernel message 'fbt_getargdesc' appears on use of 'dtrace -vl'.
--
Dr. Andreas Longwitz
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