diff options
| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2026-04-20 23:01:43 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2026-04-22 09:26:46 +0900 |
| commit | 453553e1ed53ca364454e155ba33e110d02c75cd (patch) | |
| tree | 37b91ad22a87cae0c2ae163bf16fa50476cbf1f1 | |
| parent | 132001e9f90e577d002e0ba613205340c579921f (diff) | |
selftests/ftrace: Add a testcase for multiple fprobe events
Add a testcase for multiple fprobe events on the same function
so that it clears ftrace hash map correctly when removing the
events.
Link: https://lore.kernel.org/all/177669370353.132053.16801520791509406141.stgit@mhiramat.tok.corp.google.com/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
| -rw-r--r-- | tools/testing/selftests/ftrace/test.d/dynevent/add_remove_multiple_fprobe.tc | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_multiple_fprobe.tc b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_multiple_fprobe.tc new file mode 100644 index 000000000000..f2cbf2ffd29b --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/dynevent/add_remove_multiple_fprobe.tc @@ -0,0 +1,69 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Generic dynamic event - add/remove multiple fprobe events on the same function +# requires: dynamic_events "f[:[<group>/][<event>]] <func-name>[%return] [<args>]":README enabled_functions + +echo 0 > events/enable +echo > dynamic_events + +PLACE=vfs_read +PLACE2=vfs_open + +:;: 'Ensure no other ftrace user' ;: +test `cat enabled_functions | wc -l` -eq 0 || exit_unresolved + +:;: 'Test case 1: leave entry event' ;: +:;: 'Add entry and exit events on the same place' ;: +echo "f:event1 ${PLACE}" >> dynamic_events +echo "f:event2 ${PLACE}%return" >> dynamic_events + +:;: 'Enable both of them' ;: +echo 1 > events/fprobes/enable +test `cat enabled_functions | wc -l` -eq 1 + +:;: 'Disable and remove exit event' ;: +echo 0 > events/fprobes/event2/enable +echo -:event2 >> dynamic_events + +:;: 'Disable and remove all events' ;: +echo 0 > events/fprobes/enable +echo > dynamic_events + +:;: 'Add another event' ;: +echo "f:event3 ${PLACE2}%return" > dynamic_events +echo 1 > events/fprobes/enable +test `cat enabled_functions | wc -l` -eq 1 + +:;: 'No other ftrace user' ;: +echo 0 > events/fprobes/enable +echo > dynamic_events +test `cat enabled_functions | wc -l` -eq 0 + +:;: 'Test case 2: leave exit event' ;: +:;: 'Add entry and exit events on the same place' ;: +echo "f:event1 ${PLACE}" >> dynamic_events +echo "f:event2 ${PLACE}%return" >> dynamic_events + +:;: 'Enable both of them' ;: +echo 1 > events/fprobes/enable +test `cat enabled_functions | wc -l` -eq 1 + +:;: 'Disable and remove entry event' ;: +echo 0 > events/fprobes/event1/enable +echo -:event1 >> dynamic_events + +:;: 'Disable and remove all events' ;: +echo 0 > events/fprobes/enable +echo > dynamic_events + +:;: 'Add another event' ;: +echo "f:event3 ${PLACE2}" > dynamic_events +echo 1 > events/fprobes/enable +test `cat enabled_functions | wc -l` -eq 1 + +:;: 'No other ftrace user' ;: +echo 0 > events/fprobes/enable +echo > dynamic_events +test `cat enabled_functions | wc -l` -eq 0 + +clear_trace |