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Commit 9ed19c76 authored by Steven Rostedt (VMware)'s avatar Steven Rostedt (VMware)
Browse files

selftests: ftrace: Add check for function-fork before running pid filter test 



Have the func-filter-pid test check for the function-fork option before
testing it. It can still test the pid filtering, but will stop before
testing the function-fork option for children inheriting the pids.
This allows the test to be added before the function-fork feature, but after
a bug fix that triggers one of the bugs the test can cause.

Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 093be89a

tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc

+23 −4
Original line number Diff line number Diff line
@@ -19,10 +19,19 @@ if [ ! -f set_ftrace_filter ]; then 
    exit_unsupported

fi



do_function_fork=1



if [ ! -f options/function-fork ]; then

    do_function_fork=0

    echo "no option for function-fork found. Option will not be tested."

fi



read PID _ < /proc/self/stat



if [ $do_function_fork -eq 1 ]; then

    # default value of function-fork option

    orig_value=`grep function-fork trace_options`

fi



do_reset() {

    reset_tracer
@@ -31,6 +40,10 @@ do_reset() { 
    echo > set_ftrace_filter

    echo > set_ftrace_pid



    if [ $do_function_fork -eq 0 ]; then

	return

    fi



    echo $orig_value > trace_options

}
@@ -53,8 +66,10 @@ do_test() { 
    echo $PID > set_ftrace_pid

    echo function > current_tracer



    if [ $do_function_fork -eq 1 ]; then

	# don't allow children to be traced

	echo nofunction-fork > trace_options

    fi



    enable_tracing

    yield
@@ -70,6 +85,10 @@ do_test() { 
    disable_tracing

    clear_trace



    if [ $do_function_fork -eq 0 ]; then

	return

    fi



    # allow children to be traced

    echo function-fork > trace_options