From 87ffef79ab7562ca4a1f6f22ed7ddef1c434bc24 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Wed, 24 Aug 2011 15:18:34 +0200 Subject: [PATCH] perf symbols: Treat all memory maps without dso file as loaded The stack/vdso/heap memory maps dont have any dso file. Setting the perf dso objects as 'loaded' for these maps, we avoid unnecessary warnings like: "Failed to open [stack], continuing without symbols" All map__find_* functions still return NULL when searching for symbols in these maps. Link: http://lkml.kernel.org/r/20110824131834.GA2007@jolsa.brq.redhat.com Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Jiri Olsa Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/map.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index aa2f9fd178e..9cf0d4393c8 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -18,6 +18,13 @@ static inline int is_anon_memory(const char *filename) return strcmp(filename, "//anon") == 0; } +static inline int is_no_dso_memory(const char *filename) +{ + return !strcmp(filename, "[stack]") || + !strcmp(filename, "[vdso]") || + !strcmp(filename, "[heap]"); +} + void map__init(struct map *self, enum map_type type, u64 start, u64 end, u64 pgoff, struct dso *dso) { @@ -42,9 +49,10 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len, if (self != NULL) { char newfilename[PATH_MAX]; struct dso *dso; - int anon; + int anon, no_dso; anon = is_anon_memory(filename); + no_dso = is_no_dso_memory(filename); if (anon) { snprintf(newfilename, sizeof(newfilename), "/tmp/perf-%d.map", pid); @@ -57,12 +65,16 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len, map__init(self, type, start, start + len, pgoff, dso); - if (anon) { -set_identity: + if (anon || no_dso) { self->map_ip = self->unmap_ip = identity__map_ip; - } else if (strcmp(filename, "[vdso]") == 0) { - dso__set_loaded(dso, self->type); - goto set_identity; + + /* + * Set memory without DSO as loaded. All map__find_* + * functions still return NULL, and we avoid the + * unnecessary map__load warning. + */ + if (no_dso) + dso__set_loaded(dso, self->type); } } return self; -- 2.20.1