From: Tom Zanussi <[email protected]> This patch implements a script called 'crosstap', which essentially encapsulates and automates the tedious steps until now required to use systemtap on a remote embedded target, outlined here:
https://wiki.yoctoproject.org/wiki/Tracing_and_Profiling There's actually a Yocto bug tracking this work, see for a little more background: https://bugzilla.yoctoproject.org/show_bug.cgi?id=1551 I've tested the below scripts on a couple qemu targets (qemuarm and qemux86) as well as on real hardware (emenlow). I'll be doing a lot more testing of this script in the coming weeks as I address another enhancement (tracing and profiling HOWTOs): https://bugzilla.yoctoproject.org/show_bug.cgi?id=1640 The examples tested were: 1) The simplest possible probe, which just prints 'hello world': probe begin { print ("hello world\n") exit () } [trz@empanada tutorial]$ crosstap [email protected] helloworld.stp ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial [email protected]'s password: hello world 2) The next simplest possible probe, which prints 'hello world', but also demonstrates that any number of arguements can be passed to the systemtap script: probe begin { printf("hello world with cmdline args, numeric arg: %d, string arg: %s\n", $1, @2) exit () } [trz@empanada tutorial]$ crosstap [email protected] helloworld_args.stp 99 ninetynine -v ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial [email protected]'s password: Pass 1: parsed user script and 83 library script(s) using 150500virt/22236res/2148shr/20612data kb, in 80usr/0sys/81real ms. Pass 2: analyzed script: 1 probe(s), 1 function(s), 0 embed(s), 0 global(s) using 150896virt/22760res/2224shr/21008data kb, in 0usr/0sys/2real ms. Pass 3: translated to C into "/tmp/stapJsYotR/helloworld_args_src.c" using 151020virt/23208res/2616shr/21132data kb, in 0usr/0sys/0real ms. Pass 4: compiled C into "helloworld_args.ko" in 1030usr/450sys/1568real ms. Pass 5: starting run. hello world with cmdline args, numeric arg: 99, string arg: ninetynine Pass 5: run completed in 10usr/0sys/426real ms. 3) A more interesting, marginally useful test, instrumenting and printing out information about every 'open' syscall that happens on the system: probe syscall.open { printf ("%s(%d) open (%s)\n", execname(), pid(), argstr) } probe timer.ms(9000) # after 9 seconds { exit () } On the target system: # cat /etc/* [trz@empanada tutorial]$ crosstap [email protected] trace_open.stp ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial ~/tracing/systemtap/scripts/tutorial [email protected]'s password: syslogd(811) open ("/var/log/messages", O_WRONLY|O_APPEND|O_CREAT|O_LARGEFILE|O_NOCTTY|O_NONBLOCK, 0666) cat(963) open ("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC|O_CLOEXEC) cat(963) open ("/lib/libc.so.6", O_RDONLY|O_CLOEXEC|O_CLOEXEC) cat(963) open ("X11", O_RDONLY|O_LARGEFILE) cat(963) open ("apm", O_RDONLY|O_LARGEFILE) cat(963) open ("asound.conf", O_RDONLY|O_LARGEFILE) . . . cat(963) open ("init.d", O_RDONLY|O_LARGEFILE) cat(963) open ("inittab", O_RDONLY|O_LARGEFILE) cat(963) open ("inputrc", O_RDONLY|O_LARGEFILE) cat(963) open ("issue", O_RDONLY|O_LARGEFILE) cat(963) open ("issue.net", O_RDONLY|O_LARGEFILE) cat(963) open ("ld.so.cache", O_RDONLY|O_LARGEFILE) matchbox-termin(891) open ("/tmp/vteNQTCKW", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) matchbox-termin(891) open ("/tmp/vteQOVCKW", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) matchbox-termin(891) open ("/tmp/vte0QKDKW", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) matchbox-termin(891) open ("/tmp/vteUBAFKW", O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600) cat(963) open ("ld.so.conf", O_RDONLY|O_LARGEFILE) cat(963) open ("libnl", O_RDONLY|O_LARGEFILE) cat(963) open ("limits", O_RDONLY|O_LARGEFILE) cat(963) open ("login.access", O_RDONLY|O_LARGEFILE) cat(963) open ("login.defs", O_RDONLY|O_LARGEFILE) cat(963) open ("logrotate.d", O_RDONLY|O_LARGEFILE) cat(963) open ("matchbox", O_RDONLY|O_LARGEFILE) . . . The following changes since commit 9ba1e33e2d14362971d6441ee6142bcb0857df1a: sstate: Ensure master.list exists if it doesn't already (2012-08-30 22:45:56 -0700) are available in the git repository at: git://git.yoctoproject.org/poky-contrib.git tzanussi/crosstap.v1 http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/log/?h=tzanussi/crosstap.v1 Tom Zanussi (1): crosstap: new script scripts/crosstap | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100755 scripts/crosstap -- 1.7.11.4 _______________________________________________ Openembedded-core mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
