2008/6/11 John Birrell <jb_at_what-creek.com>: > > It's been a few weeks now since I committed DTrace support to current. I'm curious... impact over performances? > > To start using DTrace to trace stuff in the kernel (userland tracing > isn't supported yet), here's what you need to do: > > 1. Grab the latest current sources for the entire src tree. > 2. Do a 'make buildworld' of those sources on either a -current system > or a releng7 system. > 3. Add 'options KDTRACE_HOOKS' and 'options DDB_CTF' to your kernel > config file (on i386 or amd64; users of other arches can go watch > a movie instead). > 4. Do a 'make WITH_CTF=1 buildkernel && make installkernel' Done, but I get this error MAKE=make sh /usr/src/sys/conf/newvers.sh GENERIC cc -c -O -pipe -std=c99 -g -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions -nostdinc -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -mno-align-long-strings -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -Werror vers.c linking kernel.debug subr_kdb.o(.text+0x650): In function `kdb_enter': : multiple definition of `kdb_enter' kern_dtrace.o(.text+0x1e0): first defined here ld: Warning: size of symbol `kdb_enter' changed from 34 in kern_dtrace.o to 70 in subr_kdb.o *** Error code 1 Stop in /usr/obj/usr/src/sys/NEWK. *** Error code 1 Stop in /usr/src. *** Error code 1 Stop in /usr/src. NEWK=GENERIC without debugging uname -a FreeBSD 8.0-CURRENT #3: Sun Jun 8 23:23:55 CEST 2008 i386 thanks in advance -- Diego DepaoliReceived on Thu Jun 12 2008 - 20:04:08 UTC
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