From: Arnaldo Carvalho de Melo <[email protected]>
Acked-by: David Ahern <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/util/dso.h | 4 ++++
tools/perf/util/symbol.c | 7 ++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 2fe98bb0e95b..c73276db6d6f 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -137,6 +137,10 @@ struct dso {
struct rb_node rb_node; /* rbtree node sorted by long name */
struct rb_root symbols[MAP__NR_TYPES];
struct rb_root symbol_names[MAP__NR_TYPES];
+ struct {
+ u64 addr;
+ struct symbol *symbol;
+ } last_find_result[MAP__NR_TYPES];
void *a2l;
char *symsrc_filename;
unsigned int a2l_fails;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 45c2e3a8316b..725640fd7cd8 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -444,7 +444,12 @@ static struct symbol *symbols__find_by_name(struct rb_root
*symbols,
struct symbol *dso__find_symbol(struct dso *dso,
enum map_type type, u64 addr)
{
- return symbols__find(&dso->symbols[type], addr);
+ if (dso->last_find_result[type].addr != addr) {
+ dso->last_find_result[type].addr = addr;
+ dso->last_find_result[type].symbol =
symbols__find(&dso->symbols[type], addr);
+ }
+
+ return dso->last_find_result[type].symbol;
}
struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
--
2.1.0
--
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