kernel/tools/testing/selftests/ftrace/test.d/functions, branch linux-5.2.y

selftests/ftrace: Move kprobe/uprobe check_error() to test.d/functions

2019-04-08T13:22:50Z

The k/uprobe_sytax_errors test case defines a check_error() function used to run a command and check the position of the caret in the output. This would be useful for other ftrace facilities too, so move it to test.d/functions for use by anyone. In the process, rename it to ftrace_errlog_check() and parametrize it for general use. Link: http://lkml.kernel.org/r/9f88080a06f1755811f69081926afe7e5cb53178.1554072478.git.tom.zanussi@linux.intel.com Acked-by: Masami Hiramatsu Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Use loopback address instead of localhost

2018-10-24T20:49:35Z

Use raw loopback address instead of localhost, because "localhost" can depend on nsswitch and in some case we can not resolve the localhost. Signed-off-by: Masami Hiramatsu Signed-off-by: Shuah Khan (Samsung OSG)

selftests/ftrace: More initialize features in initialize_ftrace

2018-10-24T20:49:35Z

Clear pid filter, synthetic_events, snapshots, ftrace filter, and trace log in initialize_ftrace(), since those are used in test cases. Signed-off-by: Masami Hiramatsu Acked-by: Steven Rostedt (VMware) Signed-off-by: Shuah Khan (Samsung OSG)

ftrace/selftest: Fix reset_trigger() to handle triggers with filters

2018-05-29T12:29:46Z

The reset_trigger() function breaks up the command by a space ' '. This is useful to ignore the '[active]' word for triggers when removing them. But if the trigger has a filter (ie. "if prio < 10") then the filter needs to be attached to the line that is written into the trigger file to remove it. But the truncation removes the filter and the triggers are not cleared properly. Before, reset_trigger() did this: # echo 'hist:keys=common_pid if prev_prio < 10' > events/sched/sched_switch/trigger # echo 'hist:keys=common_pid if next_prio < 10' >> events/sched/sched_switch/trigger # cat events/sched/sched_switch/trigger hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10 [active] hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active] reset_trigger() { echo '!hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048' >> events/sched/sched_switch/trigger } # cat events/sched/sched_switch/trigger hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10 [active] hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active] After, where it includes the filter: reset_trigger() { echo '!hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10' >> events/sched/sched_switch/trigger } # cat events/sched/sched_switch/trigger hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active] Fixes: cfa0963dc474f ("kselftests/ftrace : Add event trigger testcases") Acked-by: Masami Hiramatsu Reviewed-by: Namhyung Kim Signed-off-by: Steven Rostedt (VMware)

ftrace/selftest: Have the reset_trigger code be a bit more careful

2018-05-29T12:29:37Z

The trigger code is picky in how it can be disabled as there may be dependencies between different events and synthetic events. Change the order on how triggers are reset. 1) Reset triggers of all synthetic events first 2) Remove triggers with actions attached to them 3) Remove all other triggers If this order isn't followed, then some triggers will not be reset, and an error may happen because a trigger is busy. Cc: stable@vger.kernel.org Fixes: cfa0963dc474f ("kselftests/ftrace : Add event trigger testcases") Reviewed-by: Namhyung Kim Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

selftests: ftrace: Add inter-event hist triggers testcases

2018-03-10T21:06:05Z

This adds inter-event hist triggers testcases which covers following: - create/remove synthetic event - disable histogram for synthetic event - extended error support - field variable support - histogram variables - histogram trigger onmatch action - histogram trigger onmax action - histogram trigger onmatch-onmax action - simple expression support - combined histogram Here is the test result. === Ftrace unit tests === [1] event trigger - test extended error support [PASS] [2] event trigger - test field variable support [PASS] [3] event trigger - test inter-event combined histogram trigger [PASS] [4] event trigger - test inter-event histogram trigger onmatch action [PASS] [5] event trigger - test inter-event histogram trigger onmatch-onmax action [PASS] [6] event trigger - test inter-event histogram trigger onmax action [PASS] [7] event trigger - test synthetic event create remove [PASS] Link: http://lkml.kernel.org/r/e07ef1e72f7bf0f84dc87c9b736d6dc91b4b0b49.1516069914.git.tom.zanussi@linux.intel.com Signed-off-by: Rajvi Jingar Signed-off-by: Tom Zanussi Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Have reset_ftrace_filter handle multiple instances

2018-02-08T15:13:17Z

If a probe is attached to a static function that is in multiple files with the same name, removing it by name will remove all instances: # grep jump_label_unlock set_ftrace_filter jump_label_unlock:traceoff:unlimited jump_label_unlock:traceoff:unlimited # echo '!jump_label_unlock:traceoff' >> set_ftrace_filter # grep jump_label_unlock set_ftrace_filter # But the loop in reset_ftrace_filter will try to remove multiple instances multiple times. If this happens the second time will error and cause the test to fail. At each iteration of the loop, check to see if the probe being removed still exists. Cc: Shuah Khan Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Have reset_ftrace_filter handle modules

2018-02-08T15:13:09Z

If a function probe in set_ftrace_filter belongs to a module, it will contain the module name. Like: wmi_query_block [wmi]:traceoff:unlimited But writing: '!wmi_query_block [wmi]:traceoff' > set_ftrace_filter will cause an error. We still need to write: '!wmi_query_block:traceoff' > set_ftrace_filter Cc: Shuah Khan Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Fix bashisms

2017-05-18T01:54:51Z

Fix a few bashisms in ftrace selftests. Link: http://lkml.kernel.org/r/5fbf4613eef0766918fa04e3ff537cae271223ee.1494956770.git.naveen.n.rao@linux.vnet.ibm.com Acked-by: Masami Hiramatsu Signed-off-by: Naveen N. Rao Signed-off-by: Steven Rostedt (VMware)

selftests: ftrace: Add a way to reset triggers in the set_ftrace_filter file

2017-04-18T17:48:25Z

Just writing into the set_ftrace_filter file does not reset triggers, even though it can reset the function list. Triggers require writing the trigger name with a "!" prepended. It's worse that it requires the number if the trigger has a count associated to it. Add a reset_ftrace_filter function to the ftrace self tests to allow for the tests to have a generic way to clear them. It also resets any functions that are listed in that file as well. Signed-off-by: Steven Rostedt (VMware)