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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2016-11-16 17:13:02 +0900 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-11-22 13:30:58 -0500 |
| commit | 131f840d5b7c73cdb928c4dc7afd5120b0154d34 (patch) | |
| tree | c3bd0ce7f48bd1d8acbdafb37a4fdd95cac16065 /tools/testing | |
| parent | fa32e8557b470f5ff90babc6cbacc61535a81a0f (diff) | |
| download | linux-131f840d5b7c73cdb928c4dc7afd5120b0154d34.tar.gz linux-131f840d5b7c73cdb928c4dc7afd5120b0154d34.tar.bz2 linux-131f840d5b7c73cdb928c4dc7afd5120b0154d34.zip | |
selftests: ftrace: Initialize ftrace before each test
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.
Link: http://lkml.kernel.org/r/147928398192.22982.7767460638302113002.stgit@devbox
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'tools/testing')
| -rwxr-xr-x | tools/testing/selftests/ftrace/ftracetest | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/functions | 28 |
2 files changed, 29 insertions, 1 deletions
diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest index 4c6a0bf8ba79..a03d366a4a2f 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 c37262f6c269..91de1a8e4f19 100644 --- a/tools/testing/selftests/ftrace/test.d/functions +++ b/tools/testing/selftests/ftrace/test.d/functions @@ -23,3 +23,31 @@ 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 > set_event_pid # event tracer is always on + [ -f set_ftrace_filter ] && echo | tee set_ftrace_* + [ -f set_graph_function ] && echo | tee set_graph_* + [ -f stack_trace_filter ] && echo > stack_trace_filter + [ -f kprobe_events ] && echo > kprobe_events + [ -f uprobe_events ] && echo > uprobe_events + enable_tracing +} |