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doc: trace/kprobes: add information about NOKPROBE_SYMBOL

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Update kprobe tracer documentation to also mention that
NOKPROBE_SYMBOL() and nokprobe_inline add symbols to the kprobes
blacklist.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/d924e20de099579ace4286e610304f054cd798db.1488991670.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Naveen N. Rao 2017-03-08 22:34:14 +05:30 committed by Arnaldo Carvalho de Melo
parent 44ca9341f6
commit c1ac094d50
1 changed files with 3 additions and 2 deletions
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5
Documentation/trace/kprobetrace.txt
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@ -8,8 +8,9 @@ Overview
-------- --------
These events are similar to tracepoint based events. Instead of Tracepoint, These events are similar to tracepoint based events. Instead of Tracepoint,
this is based on kprobes (kprobe and kretprobe). So it can probe wherever this is based on kprobes (kprobe and kretprobe). So it can probe wherever
kprobes can probe (this means, all functions body except for __kprobes kprobes can probe (this means, all functions except those with
functions). Unlike the Tracepoint based event, this can be added and removed __kprobes/nokprobe_inline annotation and those marked NOKPROBE_SYMBOL).
Unlike the Tracepoint based event, this can be added and removed
dynamically, on the fly. dynamically, on the fly.
To enable this feature, build your kernel with CONFIG_KPROBE_EVENTS=y. To enable this feature, build your kernel with CONFIG_KPROBE_EVENTS=y.