linux-kernel - [PATCH 1/3] perf map: add function to lookup inline symbols

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Date:   Thu, 21 Feb 2019 17:06:50 +0100
From:   Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
To:     linux-perf-users@...r.kernel.org
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        David Miller <davem@...emloft.net>,
        Eric Saint-Etienne <eric.saint.etienne@...cle.com>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
        Kim Phillips <kim.phillips@....com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Milian Wolff <milian.wolff@...b.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Rob Gardner <rob.gardner@...cle.com>,
        Sandipan Das <sandipan@...ux.ibm.com>,
        linux-kernel@...r.kernel.org,
        Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
Subject: [PATCH 1/3] perf map: add function to lookup inline symbols

Inlined symbols should always be added to the dso's inlined_nodes tree
in order to reuse them for a later lookup for the same address. Instead
of repeating those steps at the different users, provide a central
method to lookup and register inline symbols for a map.

Signed-off-by: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
---
 tools/perf/util/map.c | 23 +++++++++++++++++++++++
 tools/perf/util/map.h |  3 +++
 2 files changed, 26 insertions(+)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 6751301a755c..0fe74e83ca8d 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -988,3 +988,26 @@ struct map_groups *map__kmaps(struct map *map)
 	}
 	return kmap->kmaps;
 }
+
+struct inline_node *map__inlines(struct map *map, u64 addr, struct symbol *sym)
+{
+	struct inline_node *node;
+
+	if (!symbol_conf.inline_name)
+		return NULL;
+
+	if (!map->dso)
+		return NULL;
+
+	addr = map->map_ip(map, addr);
+	addr = map__rip_2objdump(map, addr);
+
+	node = inlines__tree_find(&map->dso->inlined_nodes, addr);
+	if (node)
+		return node;
+
+	node = dso__parse_addr_inlines(map->dso, addr, sym);
+	if (node)
+		inlines__tree_insert(&map->dso->inlined_nodes, node);
+	return node;
+}
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 09282aa45c80..bdcc6e77e26e 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -270,4 +270,7 @@ static inline bool is_entry_trampoline(const char *name)
 	return !strcmp(name, ENTRY_TRAMPOLINE_NAME);
 }
 
+struct inline_node *map__inlines(struct map *map, u64 addr,
+				 struct symbol *sym);
+
 #endif /* __PERF_MAP_H */
-- 
2.19.2