Messages in this thread Patch in this message |  | | From | Masami Hiramatsu <> | Subject | [PATCH -tip v2 2/6] selftests: ftrace: Initialize ftrace before each test | Date | Sun, 30 Oct 2016 15:54:10 +0900 |
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Reset ftrace to initial state before running each test. This fixes some test cases to enable tracing before starting trace test. This can avoid false-positive failure when previous testcase fails while disabling tracing.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Suggested-by: Steven Rostedt <rostedt@goodmis.org> --- tools/testing/selftests/ftrace/ftracetest | 2 +- tools/testing/selftests/ftrace/test.d/functions | 25 +++++++++++++++++++++++ 2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest index 4c6a0bf..a03d366 100755 --- a/tools/testing/selftests/ftrace/ftracetest +++ b/tools/testing/selftests/ftrace/ftracetest @@ -228,7 +228,7 @@ trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL __run_test() { # testfile # setup PID and PPID, $$ is not updated. - (cd $TRACING_DIR; read PID _ < /proc/self/stat ; set -e; set -x; . $1) + (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1) [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID } diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions index c37262f..fbaf565 100644 --- a/tools/testing/selftests/ftrace/test.d/functions +++ b/tools/testing/selftests/ftrace/test.d/functions @@ -23,3 +23,28 @@ reset_trigger() { # reset all current setting triggers done } +reset_events_filter() { # reset all current setting filters + grep -v ^none events/*/*/filter | + while read line; do + echo 0 > `echo $line | cut -f1 -d:` + done +} + +disable_events() { + echo 0 > events/enable +} + +initialize_ftrace() { # Reset ftrace to initial-state +# As the initial state, ftrace will be set to nop tracer, +# no events, no triggers, no filters, no function filters, +# no probes, and tracing on. + disable_tracing + reset_tracer + reset_trigger + reset_events_filter + disable_events + echo | tee set_ftrace_* set_graph_* stack_trace_filter set_event_pid + echo > kprobe_events + echo > uprobe_events + enable_tracing +}
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