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#!/bin/sh # SPDX-License-Identifier: GPL-2.0-only usage() { echo "Ftrace boottime trace test tool" echo "Usage: $0 [--apply|--init] [--debug] BOOTCONFIG-FILE" echo " --apply: Test actual apply to tracefs (need sudo)" echo " --init: Initialize ftrace before applying (imply --apply)" exit 1 } [ $# -eq 0 ] && usage BCONF= DEBUG= APPLY= INIT= while [ x"$1" != x ]; do case "$1" in "--debug") DEBUG=$1;; "--apply") APPLY=$1;; "--init") APPLY=$1 INIT=$1;; *) [ ! -f $1 ] && usage BCONF=$1;; esac shift 1 done if [ x"$APPLY" != x ]; then if [ `id -u` -ne 0 ]; then echo "This must be run by root user. Try sudo." 1>&2 exec sudo $0 $DEBUG $APPLY $BCONF fi fi run_cmd() { # command echo "$*" if [ x"$APPLY" != x ]; then # apply command eval $* fi } if [ x"$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." 1>&2 exit 1 fi TRACEFS=`grep -m 1 -w debugfs /proc/mounts | cut -f 2 -d " "`/tracing if [ ! -d $TRACEFS ]; then echo "Error: ftrace is not enabled on this kernel." 1>&2 exit 1 fi fi if [ x"$INIT" != x ]; then . `dirname $0`/ftrace.sh (cd $TRACEFS; initialize_ftrace) fi . `dirname $0`/xbc.sh ######## main ######### set -e xbc_init $BCONF set_value_of() { # key file if xbc_has_key $1; then val=`xbc_get_val $1 1` run_cmd "echo '$val' >> $2" fi } set_array_of() { # key file if xbc_has_key $1; then xbc_get_val $1 | while read line; do run_cmd "echo '$line' >> $2" done fi } compose_synth() { # event_name branch echo -n "$1 " xbc_get_val $2 | while read field; do echo -n "$field; "; done } print_hist_array() { # prefix key __sep="=" if xbc_has_key ${1}.${2}; then echo -n ":$2" xbc_get_val ${1}.${2} | while read field; do echo -n "$__sep$field"; __sep="," done fi } print_hist_action_array() { # prefix key __sep="(" echo -n ".$2" xbc_get_val ${1}.${2} | while read field; do echo -n "$__sep$field"; __sep="," done echo -n ")" } print_hist_one_action() { # prefix handler param echo -n ":${2}("`xbc_get_val ${1}.${3}`")" if xbc_has_key "${1}.trace"; then print_hist_action_array ${1} "trace" elif xbc_has_key "${1}.save"; then print_hist_action_array ${1} "save" elif xbc_has_key "${1}.snapshot"; then echo -n ".snapshot()" fi } print_hist_actions() { # prefix handler param for __hdr in `xbc_subkeys ${1}.${2} 1 ".[0-9]"`; do print_hist_one_action ${1}.${2}.$__hdr ${2} ${3} done if xbc_has_key ${1}.${2}.${3} ; then print_hist_one_action ${1}.${2} ${2} ${3} fi } print_hist_var() { # prefix varname echo -n ":${2}="`xbc_get_val ${1}.var.${2} | tr -d [:space:]` } print_one_histogram() { # prefix echo -n "hist" print_hist_array $1 "keys" print_hist_array $1 "values" print_hist_array $1 "sort" if xbc_has_key "${1}.size"; then echo -n ":size="`xbc_get_val ${1}.size` fi if xbc_has_key "${1}.name"; then echo -n ":name="`xbc_get_val ${1}.name` fi for __var in `xbc_subkeys "${1}.var" 1`; do print_hist_var ${1} ${__var} done if xbc_has_key "${1}.pause"; then echo -n ":pause" elif xbc_has_key "${1}.continue"; then echo -n ":continue" elif xbc_has_key "${1}.clear"; then echo -n ":clear" fi print_hist_actions ${1} "onmax" "var" print_hist_actions ${1} "onchange" "var" print_hist_actions ${1} "onmatch" "event" if xbc_has_key "${1}.filter"; then echo -n " if "`xbc_get_val ${1}.filter` fi } setup_one_histogram() { # prefix trigger-file run_cmd "echo '`print_one_histogram ${1}`' >> ${2}" } setup_histograms() { # prefix trigger-file for __hist in `xbc_subkeys ${1} 1 ".[0-9]"`; do setup_one_histogram ${1}.$__hist ${2} done if xbc_has_key ${1}.keys; then setup_one_histogram ${1} ${2} fi } setup_event() { # prefix group event [instance] branch=$1.$2.$3 if [ "$4" ]; then eventdir="$TRACEFS/instances/$4/events/$2/$3" else eventdir="$TRACEFS/events/$2/$3" fi # group enable if [ "$3" = "enable" ]; then run_cmd "echo 1 > ${eventdir}" return fi case $2 in kprobes) xbc_get_val ${branch}.probes | while read line; do run_cmd "echo 'p:kprobes/$3 $line' >> $TRACEFS/kprobe_events" done ;; synthetic) run_cmd "echo '`compose_synth $3 ${branch}.fields`' >> $TRACEFS/synthetic_events" ;; esac set_value_of ${branch}.filter ${eventdir}/filter set_array_of ${branch}.actions ${eventdir}/trigger setup_histograms ${branch}.hist ${eventdir}/trigger if xbc_has_key ${branch}.enable; then run_cmd "echo 1 > ${eventdir}/enable" fi } setup_events() { # prefix("ftrace" or "ftrace.instance.INSTANCE") [instance] prefix="${1}.event" if xbc_has_branch ${1}.event; then for grpev in `xbc_subkeys ${1}.event 2`; do setup_event $prefix ${grpev%.*} ${grpev#*.} $2 done fi if xbc_has_branch ${1}.event.enable; then if [ "$2" ]; then run_cmd "echo 1 > $TRACEFS/instances/$2/events/enable" else run_cmd "echo 1 > $TRACEFS/events/enable" fi fi } size2kb() { # size[KB|MB] case $1 in *KB) echo ${1%KB};; *MB) expr ${1%MB} \* 1024;; *) expr $1 / 1024 ;; esac } setup_instance() { # [instance] if [ "$1" ]; then instance="ftrace.instance.${1}" instancedir=$TRACEFS/instances/$1 else instance="ftrace" instancedir=$TRACEFS fi set_array_of ${instance}.options ${instancedir}/trace_options set_value_of ${instance}.trace_clock ${instancedir}/trace_clock set_value_of ${instance}.cpumask ${instancedir}/tracing_cpumask set_value_of ${instance}.tracing_on ${instancedir}/tracing_on set_value_of ${instance}.tracer ${instancedir}/current_tracer set_array_of ${instance}.ftrace.filters \ ${instancedir}/set_ftrace_filter set_array_of ${instance}.ftrace.notrace \ ${instancedir}/set_ftrace_notrace if xbc_has_key ${instance}.alloc_snapshot; then run_cmd "echo 1 > ${instancedir}/snapshot" fi if xbc_has_key ${instance}.buffer_size; then size=`xbc_get_val ${instance}.buffer_size 1` size=`eval size2kb $size` run_cmd "echo $size >> ${instancedir}/buffer_size_kb" fi setup_events ${instance} $1 set_array_of ${instance}.events ${instancedir}/set_event } # ftrace global configs (kernel.*) if xbc_has_key "kernel.dump_on_oops"; then dump_mode=`xbc_get_val "kernel.dump_on_oops" 1` [ "$dump_mode" ] && dump_mode=`eval echo $dump_mode` || dump_mode=1 run_cmd "echo \"$dump_mode\" > /proc/sys/kernel/ftrace_dump_on_oops" fi set_value_of kernel.fgraph_max_depth $TRACEFS/max_graph_depth set_array_of kernel.fgraph_filters $TRACEFS/set_graph_function set_array_of kernel.fgraph_notraces $TRACEFS/set_graph_notrace # Per-instance/per-event configs if ! xbc_has_branch "ftrace" ; then exit 0 fi setup_instance # root instance if xbc_has_branch "ftrace.instance"; then for i in `xbc_subkeys "ftrace.instance" 1`; do run_cmd "mkdir -p $TRACEFS/instances/$i" setup_instance $i done fi