3 # usttrace by Pierre-Marc Fournier 2009
4 # Distributed under the GPLv2.
7 echo "$0: error: $1" 2>/dev
/stderr
10 function sighandler
() {
12 if [ -z "$USTDPID" ]; then
13 USTDPID
="$(<$pidfilepath)"
15 # Tell the daemon to die
16 kill -SIGTERM "$USTDPID"
18 echo "Waiting for ustd to shutdown..."
26 USTTRACE_DIR
="$(dirname $0)"
27 if [ -x "${USTTRACE_DIR}/ustd/ustd" ] ; then
28 # Use the not installed libraries instead
29 USTD
="${USTTRACE_DIR}/ustd/ustd"
30 LIBINTERFORK_PATH
="${USTTRACE_DIR}/libinterfork/.libs/libinterfork.so"
31 LIBMALLOCWRAP_PATH
="${USTTRACE_DIR}/libmallocwrap/.libs/libmallocwrap.so"
32 LIBUST_PATH
="${USTTRACE_DIR}/libust/.libs/libust.so"
34 # Use the libraries that the dynamic link finds
36 if [ ! -x "$(which ustd 2>/dev/null)" ]; then
37 error
"cannot find an executable ustd; make sure its location is in the PATH"
40 LIBINTERFORK_PATH
="libinterfork.so"
41 LIBMALLOCWRAP_PATH
="libmallocwrap.so"
42 LIBUST_PATH
="libust.so.0"
45 BASE_TRACE_DIR
="${HOME}/.usttraces"
48 echo "usage: $0 OPTIONS COMMAND" 2>/dev
/stderr
50 echo "Options:" 2>/dev
/stderr
51 echo " -l Runtime link with UST library." 2>/dev
/stderr
52 echo " (Needed only if program was not linked at compile time with libust.)" 2>/dev
/stderr
53 echo " -L Add path to ust libraries to LD_LIBRARY_PATH." 2>/dev
/stderr
54 echo " -m Instrument malloc calls." 2>/dev
/stderr
55 echo " -f Also trace forked processes." 2>/dev
/stderr
56 echo " -s Use system-wide daemon instead of creating one for this session." 2>/dev
/stderr
59 while getopts ":hlLmfsW" options
; do
61 l
) arg_preload_libust
=1;;
63 m
) arg_preload_malloc
=1;;
64 f
) arg_preload_fork
=1;;
65 s
) arg_syswide_daemon
=1;;
75 shift $
(($OPTIND - 1))
77 if [ -n "$where" ]; then
78 echo $BASE_TRACE_DIR/$
(ls "$BASE_TRACE_DIR" |
tail -n 1)
88 error
"no home specified"
93 error
"no command specified"
98 # Create directory for trace output
99 DATESTRING
="$(hostname)-$(date +%Y%m%d%H%M%S%N)"
100 OUTDIR
="$BASE_TRACE_DIR/$DATESTRING"
103 # Choose ustd socket path
104 USTDSOCKPATH
="/tmp/ustd-sock-$$"
106 if [ "$arg_syswide_daemon" != "1" ];
108 pidfilepath
="/tmp/usttrace-$USER-$(date +%Y%m%d%H%M%S%N)-ustd-pid"
109 trap "sighandler $pidfilepath" SIGINT
110 mkfifo -m 0600 "$pidfilepath"
112 $USTD --pidfile "$pidfilepath" -s "$USTDSOCKPATH" -o "$OUTDIR" >"$OUTDIR/ustd.log" 2>&1 &
113 # ustd sets up its server socket
114 # ustd opens the pidfile, blocks because no one has opened it
116 # we block reading pidfile
117 # ustd writes to pidfile
118 # ustd closes pidfile
119 # we unblock reading pidfile
120 USTDPID
="$(<$pidfilepath)"
121 export UST_DAEMON_SOCKET
="$USTDSOCKPATH"
124 # Establish the environment for the command
127 export UST_AUTOPROBE
=1
129 if [ "$arg_preload_libust" = "1" ];
131 if [ -n "${LIBUST_PATH%libust.so}" ] ; then
132 export LD_LIBRARY_PATH
="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}"
134 export LD_PRELOAD
="$LD_PRELOAD:$LIBUST_PATH"
137 if [ "$arg_ld_std_ust" = "1" ];
139 if [ -n "$${LIBUST_PATH%libust.so}" ] ; then
140 export LD_LIBRARY_PATH
="$LD_LIBRARY_PATH:${LIBUST_PATH%libust.so}"
144 if [ "$arg_preload_malloc" = "1" ];
146 export LD_PRELOAD
="$LD_PRELOAD:$LIBMALLOCWRAP_PATH"
149 if [ "$arg_preload_fork" = "1" ];
151 export LD_PRELOAD
="$LD_PRELOAD:$LIBINTERFORK_PATH"
154 # Execute the command
156 ) |
tee "$OUTDIR/app.log"
158 ## Because of the keepalive mechanism, we're sure that by the time
159 ## we get here, the daemon is connected to all the buffers that still exist.
160 ## Therefore we can politely ask it to die when it's done.
162 if [ "$arg_syswide_daemon" != "1" ];
164 # Tell the daemon to die
165 kill -SIGTERM "$USTDPID"
167 echo "Waiting for ustd to shutdown..."
173 echo "Trace was output in: " $OUTDIR
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