[PATCH v3 0/3] rtla: fix cgroup and trace options parsing

[Ivan Pravdin <ipravdin.official@gmail.com>]

This series fixes 3 issue in rtla timerlat and osnoise parsing.

1. Fix buffer overflow when using --on-threshold option. Currently
   passing `--on-threshold trace` causes rtla timerlat to segfault.
   First patch addresses this issue.

2. Make -C/--cgroup option more user-friendly. Currently rtla timerlat
   and osnoise parses does not allow to specify tracer's threads cgroup
   name as `-C [cgroup]` or `--cgroup [cgroup]`. Second patch fixes this
   by allowing users to specify cgroup in the aforementioned manner.

3. When specifying `-t/--trace` before `-a/--auto`, trace filename is
   override to default <osnoise|timerlat>_trace.txt. For example, when
   running rtla as

       `rtla timerlat top -t custom_file.txt -a 100`

   when the threshold is reached, timerlat_trace.txt file is created
   instead of specified custom_file.txt. Third patch addresses this
   issue.

changes v2 -> v3:
   - Combined common logic into a utility function to parse optional
     argument value
   - Removed change that removed `clear_terminal` 

changes v1 -> v2:
   - Moved removing clear_terminal from `fix -C/--cgroup interface`
     patch to `fix -a overriding -t argument` patch
   - Added clarification why to remove clear_terminal
   - Added `Fixes:` tag to the `fix -C/--cgroup interface` patch

v2: https://lore.kernel.org/all/cover.1755018581.git.ipravdin.official@gmail.com/
v1: https://lore.kernel.org/all/cover.1755014784.git.ipravdin.official@gmail.com/

Ivan Pravdin (3):
  rtla: fix buffer overflow in actions_parse
  rtla: fix -C/--cgroup interface
  rtla: fix -a overriding -t argument

 Documentation/tools/rtla/common_options.rst |  2 +-
 tools/tracing/rtla/src/actions.c            |  2 +-
 tools/tracing/rtla/src/osnoise_hist.c       | 29 +++++++--------------
 tools/tracing/rtla/src/osnoise_top.c        | 29 +++++++--------------
 tools/tracing/rtla/src/timerlat_hist.c      | 29 +++++++--------------
 tools/tracing/rtla/src/timerlat_top.c       | 29 +++++++--------------
 tools/tracing/rtla/src/utils.c              | 26 ++++++++++++++++++
 tools/tracing/rtla/src/utils.h              |  1 +
 8 files changed, 65 insertions(+), 82 deletions(-)

-- 
2.48.1