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

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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: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware) 2017-04-18 12:32:21 -04:00
parent 093be89a12
commit 9ed19c7695
1 changed files with 23 additions and 4 deletions
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27
tools/testing/selftests/ftrace/test.d/ftrace/func-filter-pid.tc
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@ -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
# default value of function-fork option
orig_value=`grep function-fork trace_options`
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
# don't allow children to be traced
echo nofunction-fork > trace_options
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