In article <51c8d0f5.9020...@netbsd.org>, Jeff Rizzo <r...@netbsd.org> wrote: >I've been looking at our DTrace code in my spare time recently, and I'd >like to get us closer to the point where generally available D scripts >"just work" on NetBSD. One of the big missing pieces right now (by no >means the *only* missing piece) is the "syscall" provider for tracing >system calls. > >Here's the latest patch, meant to be applied with "patch -p0" in >/usr/src (or whereever): > >http://www.tastylime.net/netbsd/systrace.diff > >To test it, make sure you're set up for dtrace: > >http://wiki.netbsd.org/how_to_enable_and_run_dtrace/ > >You'll need to rebuild both the kernel and all the dtrace kmods with >these patches. Something like this to rebuild the whole system: > >./build.sh -U -O /dtracetest/obj -T /dtracetest/tools -m amd64 -j8 -V >MKDTRACE=yes release > >The kernel config I'm using is: > ># ># Kernel with dtrace enabled. > >include "arch/amd64/conf/GENERIC" > >options KDTRACE_HOOKS >options DDB_ONPANIC=1 >makeoptions DEBUG="-g" > > > >Some notes: > >- I've only tested this on amd64. It *should* work on i386 as well. > >- Only native syscalls will be traced. I could use some help figuring >out the best way to implement tracing of emulated syscalls (netbsd32, >linux, linux32, etc) given the fact that those are meant to be loadable >modules > >- The name "systrace" was not chosen by me; it's from the original >Solaris code. Yes, it conflicts with the removed "systrace" feature. >No, it doesn't have anything to do with that systrace. I would like to >rename all the dtrace providers (fbt, sdt, profile, systrace) to >"dtrace_*" names at some point, but not until after these changes are in. > >- at some point, I would like to make "MKDTRACE=yes" the default on >systems that support DTrace (amd64 and i386 at the moment), without >including KDTRACE_HOOKS in the kernel config necessarily. Thoughts?
Can't this be done as an addition/enhancement to the trace_enter()/ trace_exit() facility instead of having to enter each syscall entry? christos
