#!/bin/sh# SPDX-License-Identifier: GPL-2.0-only usage() {	echo "Dump boot-time tracing bootconfig from ftrace"	echo "Usage: $0 [--debug] [ > BOOTCONFIG-FILE]"	exit 1} DEBUG=while [ x"$1" != x ]; do	case "$1" in	"--debug")		DEBUG=$1;;	-*)		usage		;;	esac	shift 1done if [ x"$DEBUG" != x ]; then	set -xfi 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 $TRACEFS ]; then		echo "Error: ftrace is not enabled on this kernel." 1>&2		exit 1	fifi ######## main ######### set -e emit_kv() { # key =|+= value	echo "$@"} 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 $p in		\#*)		continue;;		r*)		cat 1>&2 << EOF# WARN: A return probe found but it is not supported by bootconfig. Skip it.EOF		continue;;		esac		p=${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} # Variables resolverDEFINED_VARS=UNRESOLVED_EVENTS= defined_vars() { # event-dir	grep "^hist" $1/trigger | grep -o ':[a-zA-Z0-9]*='}referred_vars() {	grep "^hist" $1/trigger | grep -o '$[a-zA-Z0-9]*'} event_is_enabled() { # enable-file	test -f $1 && grep -q "1" $1} 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			if echo $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} is_default_trace_option() { # optiongrep -qw $1 << EOFprint-parentnosym-offsetnosym-addrnoverbosenorawnohexnobinnoblocktrace_printkannotatenouserstacktracenosym-userobjnoprintk-msg-onlycontext-infonolatency-formatrecord-cmdnorecord-tgidoverwritenodisable_on_freeirq-infomarkersnoevent-forknopause-on-tracefunction-tracenofunction-forknodisplay-graphnostacktracenotest_nop_acceptnotest_nop_refuseEOF} 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`	if echo $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_optionsinstance_optionsfor i in `ls $TRACEFS/instances` ; do	instance_options $idone