tracing/boot: Add support for eprobe, fprobe, and tprobe events

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Boot-time tracing currently supports kprobe-events and synthetic-events
under per-event configuration options.

Extend boot-time tracing to support newly added dynamic probe types:
- event probes (eprobe) under the "eprobes" event group
- function probes (fprobe) under the "fprobes" event group
- tracepoint probes (tprobe) under the "tracepoints" or "tprobes"
  event group

To support this cleanly, update dyn_event_create() in trace_dynevent.c
so that passing NULL as the type parameter delegates to
create_dyn_event(), allowing generic creation of any registered
dynamic event type from a raw command string.

Update Documentation/trace/boottime-trace.rst accordingly to describe
the new per-event bootconfig options.

Link: https://lore.kernel.org/all/178613905149.259829.18185480460810689421.stgit@devnote2/

Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Changes in v3:
 - Check return values of strscpy() and snprintf() in trace_boot_add_probe_event()
   to prevent silent buffer truncation when constructing probe event strings.

Changes in v2:
 - Fix raw command detection logic for eprobes, fprobes, and tprobes
   by requiring ':' or isspace() after type prefix.
 - Consolidate duplicate loop logic into trace_boot_add_probe_event()
   helper function.

...

This commit is contained in:

Masami Hiramatsu (Google) 2026-08-08 06:44:11 +09:00

parent c13fcd3951

commit d093d4524b

3 changed files with 117 additions and 3 deletions

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18

Documentation/trace/boottime-trace.rst

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97

kernel/trace/trace_boot.c

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5

kernel/trace/trace_dynevent.c

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