Date: Tue, 05 Sep 2017 12:58:22 +0200 From: Andreas Longwitz <longwitz@incore.de> To: "freebsd-dtrace@freebsd.org" <freebsd-dtrace@freebsd.org> Subject: dtrace pid provider on entry == Trace/BPT trap process Message-ID: <59AE834E.1090700@incore.de>
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I use FreeBSD 10.3-STABLE r317936 with updated /usr/lib/dtrace/ip.c and
see an issue that in my opinion should have been solved in r269342:
I run a simple program looptest, that loops around a sprintf() call and
want to check this program with
dtrace -n 'pid$target:libc.so.*::entry {@[probefunc] = count();}' -p
$(pgrep looptest)
dtrace: description 'pid$target:libc.so.*::entry ' matched 3863 probes
After some seconds I hit CTRL-C and see
__vfprintf 741685
localeconv_l 741685
memset 741685
sprintf 741685
vsprintf 741685
__sfvwrite 1483369
memcpy 2225052
and at the same time looptest stops with
Trace/BPT trap (Speicherabzug geschrieben)
and on the console I see the kernel message
pid 67550 (looptest), uid 1003: exited on signal 5 (core dumped)
The trap does not occur all the time, but it is no problem to repeat the
trap.
---
Andreas Longwitz
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