tracing/boot: Add synthetic event support

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Add synthetic event node support to boot time tracing.
The synthetic event is a kind of event node, but the group
name is "synthetic".

 - ftrace.event.synthetic.EVENT.fields = FIELD[, FIELD2...]
   Defines new synthetic event with FIELDs. Each field should be
   "type varname".

The synthetic node requires "fields" string arraies, which defines
the fields as same as tracing/synth_events interface.

Link: http://lkml.kernel.org/r/157867241236.17873.12411615143321557709.stgit@devnote2

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Masami Hiramatsu 2020-01-11 01:06:52 +09:00 • committed by Steven Rostedt (VMware)

parent 4d655281eb

commit 3fbe2d6e1f

2 changed files with 52 additions and 0 deletions

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47

kernel/trace/trace_boot.c

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5

kernel/trace/trace_events_hist.c

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