[PATCH v9 0/6] tracing: Creation of event probe

[Steven Rostedt]

V8 Link: https://lore.kernel.org/linux-trace-devel/20210819152604.704335282@xxxxxxxxxxx/

Changes from v8:

Found and fixed a bug in the selftests that check the README file.
I was testing that requirement with eprobes, and found that it was not
flagging it as not added. Found the reason, and fixed it.

Changed the selftest for add/remove of the eprobe to just add test
and remove it.

Moved the selftest that added a eprobe to a synthetic event into the trigger
tests.

Have the "testing duplicate" not test kprobes if kprobes are not configured
in.

Steven Rostedt (VMware) (5):
      selftests/ftrace: Add clear_dynamic_events() to test cases
      selftests/ftrace: Fix requirement check of README file
      selftests/ftrace: Add test case to test adding and removing of event probe
      selftests/ftrace: Add selftest for testing eprobe events on synthetic events
      selftests/ftrace: Add selftest for testing duplicate eprobes and kprobes

Tzvetomir Stoyanov (VMware) (1):
      tracing: Add a probe that attaches to trace events

----
 include/linux/trace_events.h                       |   4 +
 kernel/trace/Makefile                              |   1 +
 kernel/trace/trace.c                               |   5 +-
 kernel/trace/trace.h                               |  18 +
 kernel/trace/trace_eprobe.c                        | 903 +++++++++++++++++++++
 kernel/trace/trace_events_trigger.c                |  14 +-
 kernel/trace/trace_kprobe.c                        |   8 -
 kernel/trace/trace_probe.c                         |  16 +-
 kernel/trace/trace_probe.h                         |   6 +-
 .../ftrace/test.d/dynevent/add_remove_eprobe.tc    |  40 +
 .../ftrace/test.d/dynevent/test_duplicates.tc      |  38 +
 tools/testing/selftests/ftrace/test.d/functions    |  24 +-
 .../inter-event/trigger-synthetic-eprobe.tc        |  53 ++
 13 files changed, 1116 insertions(+), 14 deletions(-)
 create mode 100644 kernel/trace/trace_eprobe.c
 create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/add_remove_eprobe.tc
 create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/test_duplicates.tc
 create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-synthetic-eprobe.tc