perf symbols: Fix JIT symbol resolution on heap

Gaurav reported that perf cannot profile JIT program if it executes the
code on heap.  This was because current map__new() only handle JIT on
anon mappings - extends it to handle no_dso (heap, stack) case too.

This patch assumes JIT profiling only provides dynamic function symbols
so check the mapping type to distinguish the case.  It'd provide no
symbols for data mapping - if we need to support symbols on data
mappings later it should be changed.

Reported-by: Gaurav Jain <gjain@fb.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Gaurav Jain <gjain@fb.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Gaurav Jain <gjain@fb.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1389836971-3549-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 9b9bd719aa197d0a240809834109581a57d810b2..ee1dd687a26253da7fa9da159ac542d783bdfa1d 100644 (file)
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -69,7 +69,7 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
                map->ino = ino;
                map->ino_generation = ino_gen;
 
-               if (anon) {
+               if ((anon || no_dso) && type == MAP__FUNCTION) {
                        snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid);
                        filename = newfilename;
                }
@@ -93,7 +93,7 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
                         * functions still return NULL, and we avoid the
                         * unnecessary map__load warning.
                         */
-                       if (no_dso)
+                       if (type != MAP__FUNCTION)
                                dso__set_loaded(dso, map->type);
                }
        }