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#!/bin/bash
#
# Run a systemtap script on remote target
#
# Examples (run on build host, target is 192.168.1.xxx):
# $ source oe-init-build-env"
# $ cd ~/my/systemtap/scripts"
#
# $ crosstap root@192.168.1.xxx myscript.stp"
# $ crosstap root@192.168.1.xxx myscript-with-args.stp 99 ninetynine"
#
# Copyright (c) 2012, Intel Corporation.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
function usage() {
echo "Usage: $0 <user@hostname> <sytemtap-script> [additional systemtap-script args]"
}
function setup_usage() {
echo ""
echo "'crosstap' requires a local sdk build of the target system"
echo "(or a build that includes 'tools-profile') in order to build"
echo "kernel modules that can probe the target system."
echo ""
echo "Practically speaking, that means you need to do the following:"
echo " - If you're running a pre-built image, download the release"
echo " and/or BSP tarballs used to build the image."
echo " - If you're working from git sources, just clone the metadata"
echo " and BSP layers needed to build the image you'll be booting."
echo " - Make sure you're properly set up to build a new image (see"
echo " the BSP README and/or the widely available basic documentation"
echo " that discusses how to build images)."
echo " - Build an -sdk version of the image e.g.:"
echo " $ bitbake core-image-sato-sdk"
echo " OR"
echo " - Build a non-sdk image but include the profiling tools:"
echo " [ edit local.conf and add 'tools-profile' to the end of"
echo " the EXTRA_IMAGE_FEATURES variable ]"
echo " $ bitbake core-image-sato"
echo ""
echo " [ NOTE that 'crosstap' needs to be able to ssh into the target"
echo " system, which isn't enabled by default in -minimal images. ]"
echo ""
echo "Once you've build the image on the host system, you're ready to"
echo "boot it (or the equivalent pre-built image) and use 'crosstap'"
echo "to probe it (you need to source the environment as usual first):"
echo ""
echo " $ source oe-init-build-env"
echo " $ cd ~/my/systemtap/scripts"
echo " $ crosstap root@192.168.1.xxx myscript.stp"
echo ""
}
function systemtap_target_arch() {
SYSTEMTAP_TARGET_ARCH=$1
case $SYSTEMTAP_TARGET_ARCH in
i?86)
SYSTEMTAP_TARGET_ARCH="i386"
;;
x86_64*)
SYSTEMTAP_TARGET_ARCH="x86_64"
;;
arm*)
SYSTEMTAP_TARGET_ARCH="arm"
;;
powerpc*)
SYSTEMTAP_TARGET_ARCH="powerpc"
;;
*)
;;
esac
}
if [ $# -lt 2 ]; then
usage
exit 1
fi
if [ -z "$BUILDDIR" ]; then
echo "Error: Unable to find the BUILDDIR environment variable."
echo "Did you forget to source your build system environment setup script?"
exit 1
fi
pushd $PWD
cd $BUILDDIR
BITBAKE_VARS=`bitbake -e virtual/kernel`
popd
STAGING_BINDIR_TOOLCHAIN=$(echo "$BITBAKE_VARS" | grep ^STAGING_BINDIR_TOOLCHAIN \
| cut -d '=' -f2 | cut -d '"' -f2)
STAGING_BINDIR_TOOLPREFIX=$(echo "$BITBAKE_VARS" | grep ^TARGET_PREFIX \
| cut -d '=' -f2 | cut -d '"' -f2)
SYSTEMTAP_HOST_INSTALLDIR=$(echo "$BITBAKE_VARS" | grep ^STAGING_DIR_NATIVE \
| cut -d '=' -f2 | cut -d '"' -f2)
TARGET_ARCH=$(echo "$BITBAKE_VARS" | grep ^TRANSLATED_TARGET_ARCH \
| cut -d '=' -f2 | cut -d '"' -f2)
TARGET_KERNEL_BUILDDIR=$(echo "$BITBAKE_VARS" | grep ^B= \
| cut -d '=' -f2 | cut -d '"' -f2)
systemtap_target_arch "$TARGET_ARCH"
if [ ! -d $TARGET_KERNEL_BUILDDIR ] ||
[ ! -f $TARGET_KERNEL_BUILDDIR/vmlinux ]; then
echo -e "\nError: No target kernel build found."
echo -e "Did you forget to create a local build of your image?"
setup_usage
exit 1
fi
if [ ! -f $SYSTEMTAP_HOST_INSTALLDIR/usr/bin/stap ]; then
echo -e "\nError: Native (host) systemtap not found."
echo -e "Did you accidentally build a local non-sdk image? (or forget to"
echo -e "add 'tools-profile' to EXTRA_IMAGE_FEATURES in your local.conf)?"
setup_usage
exit 1
fi
target_user_hostname="$1"
full_script_name="$2"
script_name=$(basename "$2")
script_base=${script_name%.*}
shift 2
${SYSTEMTAP_HOST_INSTALLDIR}/usr/bin/stap \
-a ${SYSTEMTAP_TARGET_ARCH} \
-B CROSS_COMPILE="${STAGING_BINDIR_TOOLCHAIN}/${STAGING_BINDIR_TOOLPREFIX}" \
-r ${TARGET_KERNEL_BUILDDIR} \
-I ${SYSTEMTAP_HOST_INSTALLDIR}/usr/share/systemtap/tapset \
-R ${SYSTEMTAP_HOST_INSTALLDIR}/usr/share/systemtap/runtime \
--remote=$target_user_hostname \
-m $script_base \
$full_script_name "$@"
exit 0
|
