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tools lib traceevent: Add way to find sub buffer boundary

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For debugging purposes, it may be helpful for the kbuffer library to flag
when crossing a sub buffer.

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/20150324135923.650983637@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-03-24 09:57:56 -04:00 • committed by Arnaldo Carvalho de Melo
parent c5e691928b
commit 82ac952be6
2 changed files with 12 additions and 0 deletions
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11
tools/lib/traceevent/kbuffer-parse.c
View file

@ -729,3 +729,14 @@ void kbuffer_set_old_format(struct kbuffer *kbuf)
kbuf->next_event = __old_next_event; kbuf->next_event = __old_next_event;
} }
/**
* kbuffer_start_of_data - return offset of where data starts on subbuffer
* @kbuf: The kbuffer
*
* Returns the location on the subbuffer where the data starts.
*/
int kbuffer_start_of_data(struct kbuffer *kbuf)
{
return kbuf->start;
}

1
tools/lib/traceevent/kbuffer.h
View file

@ -63,5 +63,6 @@ int kbuffer_missed_events(struct kbuffer *kbuf);
int kbuffer_subbuffer_size(struct kbuffer *kbuf); int kbuffer_subbuffer_size(struct kbuffer *kbuf);
void kbuffer_set_old_format(struct kbuffer *kbuf); void kbuffer_set_old_format(struct kbuffer *kbuf);
int kbuffer_start_of_data(struct kbuffer *kbuf);
#endif /* _K_BUFFER_H */ #endif /* _K_BUFFER_H */