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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 <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2011-08-24 15:18:34 +02:00 committed by Arnaldo Carvalho de Melo
parent e78cb3628b
commit 87ffef79ab
1 changed files with 18 additions and 6 deletions
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24
tools/perf/util/map.c
View File

@ -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;