2 # SPDX-License-Identifier: GPL-2.0
3 # description: ftrace - function graph filters with stack tracer
5 # Make sure that function graph filtering works, and is not
6 # affected by other tracers enabled (like stack tracer)
8 if ! grep -q function_graph available_tracers; then
9 echo "no function graph tracer configured"
13 if [ ! -f set_ftrace_filter ]; then
14 echo "set_ftrace_filter not found? Is dynamic ftrace not set?"
20 if [ -e /proc/sys/kernel/stack_tracer_enabled ]; then
21 echo 0 > /proc/sys/kernel/stack_tracer_enabled
25 echo > set_ftrace_filter
37 # filter something, schedule is always good
38 if ! echo "schedule" > set_ftrace_filter; then
40 if ! echo ".schedule" > set_ftrace_filter; then
41 fail "can not enable schedule filter"
45 echo function_graph > current_tracer
47 if [ ! -f stack_trace ]; then
48 echo "Stack tracer not configured"
53 echo "Now testing with stack tracer"
55 echo 1 > /proc/sys/kernel/stack_tracer_enabled
62 count=`cat trace | grep '()' | grep -v schedule | wc -l`
64 if [ $count -ne 0 ]; then
65 fail "Graph filtering not working with stack tracer?"
68 # Make sure we did find something
69 count=`cat trace | grep 'schedule()' | wc -l`
70 if [ $count -eq 0 ]; then
71 fail "No schedule traces found?"
74 echo 0 > /proc/sys/kernel/stack_tracer_enabled
79 count=`cat trace | grep '()' | grep -v schedule | wc -l`
81 if [ $count -ne 0 ]; then
82 fail "Graph filtering not working after stack tracer disabled?"
85 count=`cat trace | grep 'schedule()' | wc -l`
86 if [ $count -eq 0 ]; then
87 fail "No schedule traces found?"