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perf annotate: Introduce symbol__hists()

tip:perf/urgent tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message Jun 7, 2018 perf events

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Commit-ID:  e8ea922a7e077b491c6363755e3ac94d350ea253
Gitweb:     https://git.kernel.org/tip/e8ea922a7e077b491c6363755e3ac94d350ea253
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Thu, 24 May 2018 16:37:53 -0300
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Mon, 4 Jun 2018 10:28:51 -0300

perf annotate: Introduce symbol__hists()

In this case we're wanting just notes->src->histograms, allocating it if needed.

Cc Adrian Hunter <[email protected]>
Cc David Ahern <[email protected]>
Cc Jiri Olsa <[email protected]>
Cc Namhyung Kim <[email protected]>
Cc Wang Nan <[email protected]>
Link https://lkml.kernel.org/n/[email protected] open here
Signed-off-by Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/util/annotate.c | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)
tools/perf/util/annotate.c +24 -4
index a5a6d686004e..467bae0279ce 100644
@@ -863,18 +863,38 @@ static struct annotation *symbol__get_annotation(struct symbol *sym, bool cycles
 	return notes;
 }
 
+static struct annotated_source *symbol__hists(struct symbol *sym)
+{
+	struct annotation *notes = symbol__annotation(sym);
+
+	if (notes->src == NULL) {
+		notes->src = annotated_source__new();
+		if (notes->src == NULL)
+			return NULL;
+		goto alloc_histograms;
+	}
+
+	if (notes->src->histograms == NULL) {
+alloc_histograms:
+		annotated_source__alloc_histograms(notes->src, symbol__size(sym),
+						   symbol_conf.nr_events);
+	}
+
+	return notes->src;
+}
+
 static int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
 				    struct perf_evsel *evsel, u64 addr,
 				    struct perf_sample *sample)
 {
-	struct annotation *notes;
+	struct annotated_source *src;
 
 	if (sym == NULL)
 		return 0;
-	notes = symbol__get_annotation(sym, false);
-	if (notes == NULL)
+	src = symbol__hists(sym);
+	if (src == NULL)
 		return -ENOMEM;
-	return __symbol__inc_addr_samples(sym, map, notes->src, evsel->idx, addr, sample);
+	return __symbol__inc_addr_samples(sym, map, src, evsel->idx, addr, sample);
 }
 
 static int symbol__account_cycles(u64 addr, u64 start,