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fix for #5: kprobe error when naming args

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Brendan Gregg
2014-08-01 12:26:51 -07:00
parent 820330678f
commit 0010426e70
1 changed files with 18 additions and 2 deletions
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20
kernel/kprobe
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@@ -47,7 +47,7 @@
tracing=/sys/kernel/debug/tracing
flock=/var/tmp/.ftrace-lock; wroteflock=0
opt_duration=0; duration=; opt_pid=0; pid=; opt_filter=0; filter=
opt_view=0; opt_headers=0; opt_stack=0; dmesg=2
opt_view=0; opt_headers=0; opt_stack=0; dmesg=2; debug=0
trap ':' INT QUIT TERM PIPE HUP # sends execution to end tracing section
function usage {
@@ -150,13 +150,29 @@ if [[ "$kprobe" != p:* && "$kprobe" != r:* ]]; then
echo >&2 "ERROR: invalid kprobe definition (should start with p: or r:)"
usage
fi
#
# parse the following:
# r:do_sys_open
# r:my_sys_open do_sys_open
# r:do_sys_open %ax
# r:do_sys_open $retval %ax
# r:my_sys_open do_sys_open $retval %ax
# r:do_sys_open rval=$retval
# r:my_sys_open do_sys_open rval=$retval
# r:my_sys_open do_sys_open rval=$retval %ax
# ... and examples from USAGE message
#
krest=${kprobe#*:}
kname=${krest%% *}
if [[ "$krest" != *\ [a-zA-Z]* ]]; then
set -- $krest
if [[ $2 == "" || $2 == *[=%\$]* ]]; then
# if probe name unspecified, default to function name
ktype=${kprobe%%:*}
kprobe="$ktype:$kname $krest"
fi
if (( debug )); then
echo "kname: $kname, kprobe: $kprobe"
fi
if (( !opt_view )); then
if (( opt_duration )); then
echo "Tracing kprobe $kname for $duration seconds (buffered)..."