cb9464086adb7e82efad62059f2dc14e06874eca
3 # usttrace by Pierre-Marc Fournier 2009
4 # Distributed under the GPLv2.
7 LIBINTERFORK_PATH
="./libinterfork/.libs/libinterfork.so"
8 LIBMALLOCWRAP_PATH
="./libmallocwrap/.libs/libmallocwrap.so"
10 STD_LDLIBRARY_UST
="./libust/.libs:../liburcu"
12 BASE_TRACE_DIR
="$HOME/.usttraces"
15 echo "usage: $0 OPTIONS COMMAND" 2>/dev
/stderr
17 echo "Options:" 2>/dev
/stderr
18 echo " -l Runtime link with UST library." 2>/dev
/stderr
19 echo " (Needed only if program was not linked at compile time with libust.)" 2>/dev
/stderr
20 echo " -L Add path to ust libraries to LD_LIBRARY_PATH." 2>/dev
/stderr
21 echo " -m Instrument malloc calls." 2>/dev
/stderr
22 echo " -f Also trace forked processes." 2>/dev
/stderr
23 echo " -s Use system-wide daemon instead of creating one for this session." 2>/dev
/stderr
27 echo "$0: error: $1" 2>/dev
/stderr
30 while getopts ":hlLmfs" options
; do
32 l
) arg_preload_libust
=1;;
34 m
) arg_preload_malloc
=1;;
35 f
) arg_preload_fork
=1;;
36 s
) arg_syswide_daemon
=1;;
45 shift $
(($OPTIND - 1))
53 error
"no home specified"
58 error
"no command specified"
63 # Create directory for trace output
64 DATESTRING
="$(hostname)-$(date +%Y%m%d%H%M%S)"
65 OUTDIR
="$BASE_TRACE_DIR/$DATESTRING"
69 SOCKPATH
="/tmp/ust-sock-$$"
71 if [ "$arg_syswide_daemon" != "1" ];
74 $USTD -s "$SOCKPATH" -o "$OUTDIR" 2>&1 >"$OUTDIR/ustd.log" &
76 export UST_DAEMON_SOCKET
="$SOCKPATH"
79 # Wait for the daemon to settle
80 # If we don't, the process may try to connect to its socket before
82 # FIXME: is there a way to make sure this works every time? Yes,
83 # we could have a mode where ustd daemonizes itself. Therefore
84 # by the time the control returns to the console, it's ready.
88 # Establish the environment for the command
90 export UST_AUTOPROBE
=1
92 if [ "$arg_preload_libust" = "1" ];
94 export LD_LIBRARY_PATH
="$LD_LIBRARY_PATH:./libust/.libs"
95 export LD_PRELOAD
="$LD_PRELOAD:./libust/.libs/libust.so"
98 if [ "$arg_ld_std_ust" = "1" ];
100 export LD_LIBRARY_PATH
="$LD_LIBRARY_PATH:$STD_LDLIBRARY_UST"
103 if [ "$arg_preload_malloc" = "1" ];
105 export LD_PRELOAD
="$LD_PRELOAD:./libmallocwrap/.libs/libmallocwrap.so"
108 if [ "$arg_preload_fork" = "1" ];
110 export LD_PRELOAD
="$LD_PRELOAD:$LIBINTERFORK_PATH"
113 # Install a handler for SIGIO. This is the signal that will be sent by ustd to
114 # the traced program to trigger the creation of its listener thread. However,
115 # it is possible that the SIGIO will be sent after the shell fork, but before
116 # the exec of the command. If this handler isn't there, bash might terminate
117 # because of a unhandled signal.
119 # Execute the command
120 bash
-c "$CMD" 2>&1 |
tee "$OUTDIR/app.log"
122 ## Because of the keepalive mechanism, we're sure that by the time
123 ## we get here, the daemon is connected to all the buffers that still exist.
124 ## Therefore we can politely ask it to die when it's done.
126 if [ "$arg_syswide_daemon" != "1" ];
128 # Tell the daemon to die
129 kill -SIGTERM "$USTDPID"
131 echo "Waiting for ustd to shutdown..."
135 echo "Trace was output in: " $OUTDIR
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