tracing: Add infrastructure to allow set_event_pid to follow children

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Add the infrastructure needed to have the PIDs in set_event_pid to
automatically add PIDs of the children of the tasks that have their PIDs in
set_event_pid. This will also remove PIDs from set_event_pid when a task
exits

This is implemented by adding hooks into the fork and exit tracepoints. On
fork, the PIDs are added to the list, and on exit, they are removed.

Add a new option called event_fork that when set, PIDs in set_event_pid will
automatically get their children PIDs added when they fork, as well as any
task that exits will have its PID removed from set_event_pid.

This works for instances as well.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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This commit is contained in:

Steven Rostedt 2016-04-13 16:59:18 -04:00

parent f4d34a87e9

commit c37775d578

3 changed files with 79 additions and 10 deletions

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3

kernel/trace/trace.c

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2

kernel/trace/trace.h

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84

kernel/trace/trace_events.c

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