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Date: Wed, 3 Dec 2014 22:18:58 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Theodore Tso <tytso@....edu>,
Alexei Starovoitov <ast@...mgrid.com>
Subject: [PATCH v2] ftracetests: Add test to test event filter logic
Add a test to test the event filter logic. It currently tests the
following filters against sched:sched_switch event.
( prev_pid != 0 )
( prev_pid == 0 )
( prev_pid < 100 )
( prev_pid <= $$ )
( prev_pid > 100 )
( prev_pid >= $$ )
! ( prev_pid != 0 )
! ( prev_pid == 0 )
! ( prev_pid < 100 )
! ( prev_pid <= $$ )
! ( prev_pid > 100 )
! ( prev_pid >= $$ )
( prev_pid != 0 && next_pid > 10 )
( prev_pid != 0 || next_pid > 10 )
! ( prev_pid != 0 && next_pid > 10 )
! ( prev_pid != 0 || next_pid > 10 )
( prev_pid & 1 )
( prev_pid & 2 )
( prev_pid & 4 )
( prev_pid & 8 )
( prev_pid & 16 )
! ( prev_pid & 1 )
! ( prev_pid & 2 )
! ( prev_pid & 4 )
! ( prev_pid & 8 )
! ( prev_pid & 16 )
( next_comm ~ "ftrace-test-fil" )
( next_comm != "ftrace-test-fil" )
! ( next_comm ~ "ftrace-test-fil" )
! ( next_comm != "ftrace-test-fil" )
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
.../selftests/ftrace/test.d/ftrace/filter.tc | 197 +++++++++++++++++++++
1 file changed, 197 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/filter.tc
diff --git a/tools/testing/selftests/ftrace/test.d/ftrace/filter.tc b/tools/testing/selftests/ftrace/test.d/ftrace/filter.tc
new file mode 100644
index 000000000000..eef7cc6320f2
--- /dev/null
+++ b/tools/testing/selftests/ftrace/test.d/ftrace/filter.tc
@@ -0,0 +1,197 @@
+#!/bin/sh
+# description: ftrace - test filter logic
+
+EVENT=events/sched/sched_switch
+FILTER=$EVENT/filter
+ENABLE=$EVENT/enable
+
+FIELD1=prev_pid
+FIELD2=next_pid
+FIELD3=next_comm
+
+ITER=100
+
+enable_event() {
+ echo 1 > $ENABLE
+}
+
+disable_event() {
+ echo 0 > $ENABLE
+}
+
+clear_filter() {
+ echo 0 > $FILTER
+}
+
+do_reset() {
+ enable_tracing
+ disable_event
+ clear_filter
+ clear_trace
+}
+
+fail() { # msg
+ do_reset
+ echo $1
+ exit -1
+}
+
+run_code() {
+ # make lots of pids to filter on
+ for i in `seq $ITER`; do
+ ls /usr > /dev/null
+ done
+}
+
+run_event() {
+ enable_event
+ run_code
+ disable_event
+}
+
+disable_tracing
+clear_trace
+enable_tracing
+
+test_cmp() {
+ cmp=$1
+ rval=$2
+ filter=$3
+ not=$4
+
+ echo "$not ( $FIELD1 $filter )"
+ echo "$not ( $FIELD1 $filter )" > $FILTER
+
+ run_event
+
+ cat trace | sed -ne "s/.*$FIELD1=\([^ ]*\).*/\1/p" |
+ while read pid; do
+ if [ "$pid" $cmp $rval ]; then
+ if [ "$not" = '!' ]; then
+ fail "$pid matched filter: $filter; but should not not have for $not"
+ fi
+ elif [ "$not" != '!' ]; then
+ fail "$pid does not match filter: $filter"
+ fi
+ done
+ clear_trace
+}
+
+test_cmp2() {
+ cmp1=$1
+ rval1=$2
+ conj=$3
+ cmp2=$4
+ rval2=$5
+ filter1=$6
+ filter2=$7
+ fconj=$8
+ not=$9
+
+ echo "$not ( $FIELD1 $filter1 $fconj $FIELD2 $filter2 )"
+ echo "$not ( $FIELD1 $filter1 $fconj $FIELD2 $filter2 )" > $FILTER
+
+ run_event
+
+ cat trace | sed -ne "s/.*$FIELD1=\([^ ]*\).*$FIELD2=\([^ ]*\).*/\1 \2/p" |
+ while read pid1 pid2; do
+ if [ "$pid1" $cmp1 $rval1 $conj "$pid2" $cmp2 $rval2 ]; then
+ if [ "$not" = '!' ]; then
+ fail "$pid1 and $pid2 match not filter: $filter1 $fconj $filter2"
+ fi
+ elif [ "$not" != '!' ]; then
+ fail "$pid1 and $pid2 does not match filter: $filter1 $fconj $filter2"
+ fi
+ done
+ clear_trace
+}
+
+# first simple compares
+test_cmp -ne 0 "!= 0" ""
+test_cmp -eq 0 "== 0" ""
+test_cmp -lt 100 "< 100" ""
+test_cmp -le $$ "<= $$" ""
+test_cmp -gt 100 "> 100" ""
+test_cmp -ge $$ ">= $$" ""
+
+# Now test the not case
+test_cmp -ne 0 "!= 0" '!'
+test_cmp -eq 0 "== 0" '!'
+test_cmp -lt 100 "< 100" '!'
+test_cmp -le $$ "<= $$" '!'
+test_cmp -gt 100 "> 100" '!'
+test_cmp -ge $$ ">= $$" '!'
+
+# Test more complex compares (&& and !!)
+test_cmp2 -ne 0 -a -gt 10 "!= 0" "> 10" "&&" ''
+test_cmp2 -ne 0 -o -gt 10 "!= 0" "> 10" "||" ''
+
+test_cmp2 -ne 0 -a -gt 10 "!= 0" "> 10" "&&" '!'
+test_cmp2 -ne 0 -o -gt 10 "!= 0" "> 10" "||" '!'
+
+# test bitmask
+
+bit_test() {
+ not=$1
+
+ x=1
+ for i in `seq 5`; do
+ echo "$not ( $FIELD1 & $x )"
+ echo "$not ( $FIELD1 & $x )" > $FILTER
+ run_event
+
+ cat trace | sed -ne "s/.*$FIELD1=\([^ ]*\).*/\1/p" |
+ while read pid; do
+
+ val=$(($pid & $x))
+
+ if [ $val -eq 0 ]; then
+ if [ "$not" != '!' ]; then
+ fail "$pid did not match bitmask $x"
+ fi
+ elif [ "$not" = '!' ]; then
+ fail "$pid did not match not bitmask $x"
+ fi
+ done
+ clear_trace
+ x=$(($x << 1))
+ done
+}
+
+bit_test ''
+bit_test '!'
+
+test_string() {
+ cmp=$1
+ filter=$2
+ not=$3
+
+ comm=`cat /proc/$$/comm`
+
+ echo "$not ( $FIELD3 $filter \"$comm\" )"
+ echo "$not ( $FIELD3 $filter \"$comm\" )" > $FILTER
+
+ run_event
+
+ cat trace | sed -ne "s/.*$FIELD3=\([^ ]*\).*/\1/p" |
+ while read com; do
+ if [ "$com" $cmp "$comm" ]; then
+ if [ "$not" = '!' ]; then
+ fail "$com matched filter: $filter; but should not not have for $not"
+ fi
+ elif [ "$not" != '!' ]; then
+ fail "$com does not match filter: $filter"
+ fi
+ done
+ clear_trace
+}
+
+test_string "=" "~" ''
+test_string "!=" "!=" ''
+
+test_string "=" "~" '!'
+test_string "!=" "!=" '!'
+
+do_reset
+
+exit 0
--
1.8.1.4
--
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