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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2015-03-24 16:57:52 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-03-24 18:19:06 +0300 |
| commit | 2771984c7f5e6cab812e86ec152da4fb5f6df908 (patch) | |
| tree | d64fc4817823894a6a069707812f16bd197c72fa /tools/lib/traceevent/event-parse.h | |
| parent | 55426296963c678650e26fc5e61ea75a5598ef5a (diff) | |
| download | linux-2771984c7f5e6cab812e86ec152da4fb5f6df908.tar.xz | |
tools lib traceevent: Add pevent_data_pid_from_comm()
There is a pevent_data_comm_from_pid() that returns the cmdline stored for
a given pid in order for users to map pids to comms, but there's no method
to convert a comm back to a pid. This is useful for filters that specify
a comm instead of a PID (it's faster than searching each individual event).
Add a way to retrieve a comm from a pid. Since there can be more than one
pid associated to a comm, it returns a data structure that lets the user
iterate over all the saved comms for a given pid.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20150324135923.001103479@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/traceevent/event-parse.h')
| -rw-r--r-- | tools/lib/traceevent/event-parse.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index 84e554f84574..8bd7c6a4cbd7 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -678,6 +678,11 @@ int pevent_data_type(struct pevent *pevent, struct pevent_record *rec); struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type); int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec); const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid); +struct cmdline; +struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm, + struct cmdline *next); +int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline); + void pevent_event_info(struct trace_seq *s, struct event_format *event, struct pevent_record *record); int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum, |