DEBUG= while [ x"$1" != x ]; do
case "$1" in "--debug")
DEBUG=$1;;
-*)
usage
;;
esac
shift 1 done
if [ x"$DEBUG" != x ]; then
set -x fi
TRACEFS=`grep -m 1 -w tracefs /proc/mounts | cut -f 2 -d " "` if [ -z "$TRACEFS" ]; then if ! grep -wq debugfs /proc/mounts; then echo"Error: No tracefs/debugfs was mounted."
exit 1 fi
TRACEFS=`grep -m 1 -w debugfs /proc/mounts | cut -f 2 -d " "`/tracing if [ ! -d $TRACEFS ]; then echo"Error: ftrace is not enabled on this kernel." 1>&2
exit 1 fi fi
######## main #########
set -e
emit_kv() { # key =|+= value echo"$@"
}
global_options() {
val=`cat $TRACEFS/max_graph_depth`
[ $val != 0 ] && emit_kv kernel.fgraph_max_depth = $val if grep -qv "^#" $TRACEFS/set_graph_function $TRACEFS/set_graph_notrace ; then cat 1>&2 << EOF # WARN: kernel.fgraph_filters and kernel.fgraph_notrace are not supported, since the wild card expression was expanded and lost from memory.
EOF fi
}
kprobe_event_options() { cat $TRACEFS/kprobe_events | while read p args; do
case $p in
r*) cat 1>&2 << EOF # WARN: A return probe found but it is not supported by bootconfig. Skip it.
EOF
continue;;
esac
p=${p#*:}
event=${p#*/}
group=${p%/*} if [ $group != "kprobes" ]; then cat 1>&2 << EOF # WARN: kprobes group name $group is changed to "kprobes" for bootconfig.
EOF fi
emit_kv $PREFIX.event.kprobes.$event.probes += $args done
}
synth_event_options() { cat $TRACEFS/synthetic_events | while read event fields; do
emit_kv $PREFIX.event.synthetic.$event.fields = `echo $fields | sed "s/;/,/g"` done
}
per_event_options() { # event-dir
evdir=$1 # Check the special event which has no filter and no trigger
[ ! -f $evdir/filter ] && return
if grep -q "^hist:" $evdir/trigger; then # hist action can refer the undefined variables
__vars=`defined_vars $evdir` for v in `referred_vars $evdir`; do ifecho $DEFINED_VARS $__vars | grep -vqw ${v#$}; then # $v is not defined yet, defer it
UNRESOLVED_EVENTS="$UNRESOLVED_EVENTS $evdir"
return; fi done
DEFINED_VARS="$DEFINED_VARS "`defined_vars $evdir` fi
grep -v "^#" $evdir/trigger | while read action active; do
emit_kv $PREFIX.event.$group.$event.actions += \'$action\' done
if [ $GROUP_ENABLED -eq 0 ] && event_is_enabled $evdir/enable; then
emit_kv $PREFIX.event.$group.$event.enable fi
val=`cat $evdir/filter` if [ "$val" != "none" ]; then
emit_kv $PREFIX.event.$group.$event.filter = "$val" fi
}
retry_unresolved() {
unresolved=$UNRESOLVED_EVENTS
UNRESOLVED_EVENTS= for evdir in $unresolved; do
event=${evdir##*/}
group=${evdir%/*}; group=${group##*/}
per_event_options $evdir done
}
event_options() { # PREFIX and INSTANCE must be set if [ $PREFIX = "ftrace" ]; then # define the dynamic events
kprobe_event_options
synth_event_options fi
ALL_ENABLED=0 if event_is_enabled $INSTANCE/events/enable; then
emit_kv $PREFIX.event.enable
ALL_ENABLED=1 fi for group in `ls $INSTANCE/events/` ; do
[ ! -d $INSTANCE/events/$group ] && continue
GROUP_ENABLED=$ALL_ENABLED if [ $ALL_ENABLED -eq 0 ] && \
event_is_enabled $INSTANCE/events/$group/enable ;then
emit_kv $PREFIX.event.$group.enable
GROUP_ENABLED=1 fi for event in `ls $INSTANCE/events/$group/` ;do
[ ! -d $INSTANCE/events/$group/$event ] && continue
per_event_options $INSTANCE/events/$group/$event done done
retry=0 while [ $retry -lt 3 ]; do
retry_unresolved
retry=$((retry + 1)) done if [ "$UNRESOLVED_EVENTS" ]; then cat 1>&2 << EOF
! ERROR: hist triggers in $UNRESOLVED_EVENTS use some undefined variables.
EOF fi
}
instance_options() { # [instance-name] if [ $# -eq 0 ]; then
PREFIX="ftrace"
INSTANCE=$TRACEFS else
PREFIX="ftrace.instance.$1"
INSTANCE=$TRACEFS/instances/$1 fi
val= for i in `cat $INSTANCE/trace_options`; do
is_default_trace_option $i && continue
val="$val, $i" done
[ "$val" ] && emit_kv $PREFIX.options = "${val#,}"
val="local" for i in `cat $INSTANCE/trace_clock` ; do
[ "${i#*]}" ] && continue
i=${i%]}; val=${i#[} done
[ $val != "local" ] && emit_kv $PREFIX.trace_clock = $val
val=`cat $INSTANCE/buffer_size_kb` ifecho $val | grep -vq "expanded" ; then
emit_kv $PREFIX.buffer_size = $val"KB" fi if grep -q "is allocated" $INSTANCE/snapshot ; then
emit_kv $PREFIX.alloc_snapshot fi
val=`cat $INSTANCE/tracing_cpumask` if [ `echo $val | sed -e s/f//g`x != x ]; then
emit_kv $PREFIX.cpumask = $val fi
val=`cat $INSTANCE/tracing_on` if [ "$val" = "0" ]; then
emit_kv $PREFIX.tracing_on = 0 fi
val=`cat $INSTANCE/current_tracer`
[ $val != nop ] && emit_kv $PREFIX.tracer = $val if grep -qv "^#" $INSTANCE/set_ftrace_filter $INSTANCE/set_ftrace_notrace; then cat 1>&2 << EOF # WARN: kernel.ftrace.filters and kernel.ftrace.notrace are not supported, since the wild card expression was expanded and lost from memory.
EOF fi
event_options
}
global_options
instance_options for i in `ls $TRACEFS/instances` ; do
instance_options $i done
Messung V0.5
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