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|
#!/bin/bash
# usttrace by Pierre-Marc Fournier 2009
# Distributed under the GPLv2.
function error() {
echo "$0: error: $1" 2>/dev/stderr
}
function sighandler() {
echo "Caught Ctrl-C"
if [ -z "$USTDPID" ]; then
USTDPID="$(<$pidfilepath)"
fi
# Tell the daemon to die
kill -SIGTERM "$USTDPID"
echo "Waiting for ustd to shutdown..."
wait "$USTDPID"
rm "$pidfilepath"
exit 0;
}
USTTRACE_DIR="$(dirname $0)"
if [ -x "${USTTRACE_DIR}/ustd/ustd" ] ; then
# Use the not installed libraries instead
USTD="${USTTRACE_DIR}/ustd/ustd"
LIBINTERFORK_PATH="${USTTRACE_DIR}/libustfork/.libs/libustfork.so"
LIBMALLOCWRAP_PATH="${USTTRACE_DIR}/libustinstr-malloc/.libs/libustinstr-malloc.so"
LIBUST_PATH="${USTTRACE_DIR}/libust/.libs/libust.so"
else
# Use the libraries that the dynamic link finds
USTD="ustd"
if [ ! -x "$(which ustd 2>/dev/null)" ]; then
error "cannot find an executable ustd; make sure its location is in the PATH"
exit 1
fi
LIBINTERFORK_PATH="libustfork.so"
LIBMALLOCWRAP_PATH="libustinstr-malloc.so"
LIBUST_PATH="libust.so.0"
fi
BASE_TRACE_DIR="${HOME}/.usttraces"
function usage () {
echo "usage: $0 OPTIONS COMMAND" 2>/dev/stderr
echo "" 2>/dev/stderr
echo "Options:" 2>/dev/stderr
echo " -l Runtime link with UST library." 2>/dev/stderr
echo " (Needed only if program was not linked at compile time with libust.)" 2>/dev/stderr
echo " -L Add path to ust libraries to LD_LIBRARY_PATH." 2>/dev/stderr
echo " -m Instrument malloc calls." 2>/dev/stderr
echo " -f Also trace forked processes." 2>/dev/stderr
echo " -s Use system-wide daemon instead of creating one for this session." 2>/dev/stderr
echo " -S Specify the subbuffer size." 2>/dev/stderr
echo " -N Specify the number of subbuffers." 2>/dev/stderr
}
while getopts ":hlLmfsWS:N:" options; do
case $options in
l) arg_preload_libust=1;;
L) arg_ld_std_ust=1;;
m) arg_preload_malloc=1;;
f) arg_preload_fork=1;;
s) arg_syswide_daemon=1;;
W) where=1;;
S) export UST_SUBBUF_SIZE=$OPTARG;;
N) export UST_SUBBUF_NUM=$OPTARG;;
h) usage;
exit 0;;
\?) usage
exit 1;;
*) usage
exit 1;;
esac
done
shift $(($OPTIND - 1))
if [ -n "$where" ]; then
echo $BASE_TRACE_DIR/$(ls "$BASE_TRACE_DIR" | tail -n 1)
exit 0
fi
# Prepare vars
CMD=$*
# Validate input
if [ -z "$HOME" ];
then
error "no home specified"
fi
if [ -z "$CMD" ];
then
error "no command specified"
usage;
exit 1
fi
# Create directory for trace output
DATESTRING="$(hostname)-$(date +%Y%m%d%H%M%S%N)"
OUTDIR="$BASE_TRACE_DIR/$DATESTRING"
mkdir -p "$OUTDIR"
# Choose ustd socket path
USTDSOCKPATH="/tmp/ustd-sock-$$"
if [ "$arg_syswide_daemon" != "1" ];
then
pidfilepath="/tmp/usttrace-$USER-$(date +%Y%m%d%H%M%S%N)-ustd-pid"
trap "sighandler $pidfilepath" SIGINT
mkfifo -m 0600 "$pidfilepath"
# Start daemon
$USTD --pidfile "$pidfilepath" -s "$USTDSOCKPATH" -o "$OUTDIR" >"$OUTDIR/ustd.log" 2>&1 &
# ustd sets up its server socket
# ustd opens the pidfile, blocks because no one has opened it
# we open pidfile
# we block reading pidfile
# ustd writes to pidfile
# ustd closes pidfile
# we unblock reading pidfile
USTDPID="$(<$pidfilepath)"
export UST_DAEMON_SOCKET="$USTDSOCKPATH"
fi
# Establish the environment for the command
(
export UST_TRACE=1
export UST_AUTOPROBE=1
if [ "$arg_preload_libust" = "1" ];
then
if [ -n "${LIBUST_PATH%libust.so}" ];
then
if [ -n "$LD_LIBRARY_PATH" ];
then
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}"
else
export LD_LIBRARY_PATH="${LIBUST_PATH%libust.so}"
fi
fi
if [ -n "$LIBUST_PATH" ];
then
if [ -n "$LD_PRELOAD" ];
then
export LD_PRELOAD="$LD_PRELOAD:$LIBUST_PATH"
else
export LD_PRELOAD="$LIBUST_PATH"
fi
fi
fi
if [ "$arg_ld_std_ust" = "1" ] && [ -n "${LIBUST_PATH%libust.so}" ];
then
if [ -n "$LD_LIBRARY_PATH" ];
then
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}"
else
export LD_LIBRARY_PATH="${LIBUST_PATH%libust.so}"
fi
fi
if [ "$arg_preload_malloc" = "1" ] && [ -n "$LIBMALLOCWRAP_PATH" ];
then
if [ -n "$LD_PRELOAD" ];
then
export LD_PRELOAD="$LD_PRELOAD:$LIBMALLOCWRAP_PATH"
else
export LD_PRELOAD="$LIBMALLOCWRAP_PATH"
fi
fi
if [ "$arg_preload_fork" = "1" ] && [ -n "$LIBINTERFORK_PATH" ];
then
if [ -n "$LD_PRELOAD" ];
then
export LD_PRELOAD="$LD_PRELOAD:$LIBINTERFORK_PATH"
else
export LD_PRELOAD="$LIBINTERFORK_PATH"
fi
fi
# Execute the command
$CMD 2>&1
) | tee "$OUTDIR/app.log"
## Because of the keepalive mechanism, we're sure that by the time
## we get here, the daemon is connected to all the buffers that still exist.
## Therefore we can politely ask it to die when it's done.
if [ "$arg_syswide_daemon" != "1" ];
then
# Tell the daemon to die
kill -SIGTERM "$USTDPID"
echo "Waiting for ustd to shutdown..."
wait "$USTDPID"
rm "$pidfilepath"
fi
echo "Trace was output in: " $OUTDIR
|
