[v3,0/9] tracing: Improbe BTF support on probe events

Message

Masami Hiramatsu (Google) July 26, 2023, 12:59 p.m. UTC

Hi,

Here is the 3rd version of series to improve the BTF support on probe events.
The previous series is here:

https://lore.kernel.org/all/168960739768.34107.15145201749042174448.stgit@devnote2/

The fixes patch in the previous version has been sent in different series.

https://lore.kernel.org/all/169024903018.395371.1006584451160707296.stgit@devnote2/

In this version, I added BTF support on module symbols (this will be the
biggest change) [1/9] and cleanup the btf APIs [2/9][3/9] according to
the comment. Also [5/9] introduce a query_btf_context() for simplifying
common fields in traceprobe_parse_context. [8/9] added more complex test
case for structure field access. And [9/9] update the documentation about
the mixture of '.' and '->'.

This series can be applied on top of "probes/core" branch of
https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git/

You can also get this series from:

git://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git topic/fprobe-event-ext

Thank you,

---

Masami Hiramatsu (Google) (9):
      tracing/probes: Support BTF argument on module functions
      bpf/btf: tracing: Move finding func-proto API and getting func-param API to BTF
      bpf/btf: Add a function to search a member of a struct/union
      tracing/probes: Support BTF based data structure field access
      tracing/probes: Support BTF field access from $retval
      tracing/probes: Add string type check with BTF
      tracing/fprobe-event: Assume fprobe is a return event by $retval
      selftests/ftrace: Add BTF fields access testcases
      Documentation: tracing: Update fprobe event example with BTF field


 Documentation/trace/fprobetrace.rst                |   64 ++-
 include/linux/btf.h                                |    8 
 kernel/bpf/btf.c                                   |   84 +++
 kernel/trace/trace_eprobe.c                        |    4 
 kernel/trace/trace_fprobe.c                        |   59 ++
 kernel/trace/trace_kprobe.c                        |    1 
 kernel/trace/trace_probe.c                         |  487 +++++++++++++++-----
 kernel/trace/trace_probe.h                         |   27 +
 kernel/trace/trace_uprobe.c                        |    1 
 .../ftrace/test.d/dynevent/add_remove_btfarg.tc    |   14 +
 .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc |    6 
 11 files changed, 582 insertions(+), 173 deletions(-)

--
Masami Hiramatsu (Google) <[e-mail]>