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perf callchain: Fix appending a callchain from a previous sample

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hist_entry__append_callchain() must check if the sample has a callcahin
or it will append the callchain from a previous sample.

Signed-off-by: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Adrian Hunter 2014-07-14 13:02:35 +03:00 • committed by Arnaldo Carvalho de Melo
commit 4d40b051b1
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/callchain.c
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@ -626,7 +626,7 @@ int sample__resolve_callchain(struct perf_sample *sample, struct symbol **parent
int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample)
{
if (!symbol_conf.use_callchain)
if (!symbol_conf.use_callchain || sample->callchain == NULL)
return 0;
return callchain_append(he->callchain, &callchain_cursor, sample->period);
}