ftracetest: Add a couple of ftrace test cases

#!/bin/sh

# description: ftrace - function graph filters with stack tracer

# Make sure that function graph filtering works, and is not

# affected by other tracers enabled (like stack tracer)

if ! grep -q function_graph available_tracers; then

    echo "no function graph tracer configured"

    exit_unsupported

fi

if [ ! -f set_ftrace_filter ]; then

    echo "set_ftrace_filter not found? Is dynamic ftrace not set?"

    exit_unsupported

fi

do_reset() {

    reset_tracer

    echo 0 > /proc/sys/kernel/stack_tracer_enabled

    enable_tracing

    clear_trace

    echo > set_ftrace_filter

}

fail() { # msg

    do_reset

    echo $1

    exit -1

}

disable_tracing

clear_trace;

# filter something, schedule is always good

if ! echo "schedule" > set_ftrace_filter; then

    # test for powerpc 64

    if ! echo ".schedule" > set_ftrace_filter; then

	fail "can not enable schedule filter"

    fi

fi

echo function_graph > current_tracer

if [ ! -f stack_trace ]; then

    echo "Stack tracer not configured"

    do_reset

    exit_unsupported;

fi

echo "Now testing with stack tracer"

echo 1 > /proc/sys/kernel/stack_tracer_enabled

disable_tracing

clear_trace

enable_tracing

sleep 1

count=`cat trace | grep '()' | grep -v schedule | wc -l`

if [ $count -ne 0 ]; then

    fail "Graph filtering not working with stack tracer?"

fi

# Make sure we did find something

count=`cat trace | grep 'schedule()' | wc -l` 

if [ $count -eq 0 ]; then

    fail "No schedule traces found?"

fi

echo 0 > /proc/sys/kernel/stack_tracer_enabled

clear_trace

sleep 1

count=`cat trace | grep '()' | grep -v schedule | wc -l`

if [ $count -ne 0 ]; then

    fail "Graph filtering not working after stack tracer disabled?"

fi

count=`cat trace | grep 'schedule()' | wc -l` 

if [ $count -eq 0 ]; then

    fail "No schedule traces found?"

fi

do_reset

exit 0

#!/bin/sh

# description: ftrace - function graph filters

# Make sure that function graph filtering works

if ! grep -q function_graph available_tracers; then

    echo "no function graph tracer configured"

    exit_unsupported

fi

do_reset() {

    reset_tracer

    enable_tracing

    clear_trace

}

fail() { # msg

    do_reset

    echo $1

    exit -1

}

disable_tracing

clear_trace

# filter something, schedule is always good

if ! echo "schedule" > set_ftrace_filter; then

    # test for powerpc 64

    if ! echo ".schedule" > set_ftrace_filter; then

	fail "can not enable schedule filter"

    fi

fi

echo function_graph > current_tracer

enable_tracing

sleep 1

# search for functions (has "()" on the line), and make sure

# that only the schedule function was found

count=`cat trace | grep '()' | grep -v schedule | wc -l`

if [ $count -ne 0 ]; then

    fail "Graph filtering not working by itself?"

fi

# Make sure we did find something

count=`cat trace | grep 'schedule()' | wc -l` 

if [ $count -eq 0 ]; then

    fail "No schedule traces found?"

fi

do_reset

exit 0

#!/bin/sh

# description: ftrace - function profiler with function tracing

# There was a bug after a rewrite of the ftrace infrastructure that

# caused the function_profiler not to be able to run with the function

# tracer, because the function_profiler used the function_graph tracer

# and it was assumed the two could not run simultaneously.

#

# There was another related bug where the solution to the first bug

# broke the way filtering of the function tracer worked.

#

# This test triggers those bugs on those kernels.

#

# We need function_graph and profiling to to run this test

if ! grep -q function_graph available_tracers; then

    echo "no function graph tracer configured"

    exit_unsupported;

fi

if [ ! -f set_ftrace_filter ]; then

    echo "set_ftrace_filter not found? Is dynamic ftrace not set?"

    exit_unsupported

fi

if [ ! -f function_profile_enabled ]; then

    echo "function_profile_enabled not found, function profiling enabled?"

    exit_unsupported

fi

fail() { # mesg

    reset_tracer

    echo > set_ftrace_filter

    echo $1

    exit -1

}

echo "Testing function tracer with profiler:"

echo "enable function tracer"

echo function > current_tracer

echo "enable profiler"

echo 1 > function_profile_enabled

sleep 1

echo "Now filter on just schedule"

echo '*schedule' > set_ftrace_filter

clear_trace

echo "Now disable function profiler"

echo 0 > function_profile_enabled

sleep 1

# make sure only schedule functions exist

echo "testing if only schedule is being traced"

if grep -v -e '^#' -e 'schedule' trace; then

	fail "more than schedule was found"

fi

echo "Make sure schedule was traced"

if ! grep -e 'schedule' trace > /dev/null; then

	cat trace

	fail "can not find schedule in trace"

fi

echo > set_ftrace_filter

clear_trace

sleep 1

echo "make sure something other than scheduler is being traced"

if ! grep -v -e '^#' -e 'schedule' trace > /dev/null; then

	cat trace

	fail "no other functions besides schedule was found"

fi

reset_tracer

exit 0