Prev: [GIT PULL 0/2] perf tui fix and annotate improvement
Next: [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space
From: Arnaldo Carvalho de Melo on 26 May 2010 17:40
From: Arnaldo Carvalho de Melo <acme(a)redhat.com>

So that if the kernel DSO has a build id because record inserted it in
the perf.data build id table in the header, or a BUILD_ID event was
inserted in the stream, we first look at the build id cache
($HOME/.debug/).

If we find it there, try to use it, allowing offline annotation in
addition to 'perf report'.

Reported-by: Stephane Eranian <eranian(a)google.com>
Cc: Frédéric Weisbecker <fweisbec(a)gmail.com>
Cc: Mike Galbraith <efault(a)gmx.de>
Cc: Paul Mackerras <paulus(a)samba.org>
Cc: Peter Zijlstra <a.p.zijlstra(a)chello.nl>
Cc: Stephane Eranian <eranian(a)google.com>
Cc: Tom Zanussi <tzanussi(a)gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme(a)redhat.com>
---
tools/perf/builtin-top.c | 2 +-
tools/perf/util/symbol.c | 27 +++++++++++++++++++++++----
tools/perf/util/symbol.h | 2 +-
3 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 397290a..a66f427 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1060,7 +1060,7 @@ static void event__process_sample(const event_t *self,
pr_err("Can't annotate %s", sym->name);
if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
pr_err(": No vmlinux file was found in the path:\n");
- vmlinux_path__fprintf(stderr);
+ machine__fprintf_vmlinux_path(machine, stderr);
} else
pr_err(".\n");
exit(1);
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index aaa51ba..7fd6b15 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1695,9 +1695,20 @@ int dso__load_vmlinux_path(struct dso *self, struct map *map,
symbol_filter_t filter)
{
int i, err = 0;
+ char *filename;

pr_debug("Looking at the vmlinux_path (%d entries long)\n",
- vmlinux_path__nr_entries);
+ vmlinux_path__nr_entries + 1);
+
+ filename = dso__build_id_filename(self, NULL, 0);
+ if (filename != NULL) {
+ err = dso__load_vmlinux(self, map, filename, filter);
+ if (err > 0) {
+ dso__set_long_name(self, filename);
+ goto out;
+ }
+ free(filename);
+ }

for (i = 0; i < vmlinux_path__nr_entries; ++i) {
err = dso__load_vmlinux(self, map, vmlinux_path[i], filter);
@@ -1706,7 +1717,7 @@ int dso__load_vmlinux_path(struct dso *self, struct map *map,
break;
}
}
-
+out:
return err;
}

@@ -2102,13 +2113,21 @@ out_fail:
return -1;
}

-size_t vmlinux_path__fprintf(FILE *fp)
+size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp)
{
int i;
size_t printed = 0;
+ struct dso *kdso = self->vmlinux_maps[MAP__FUNCTION]->dso;
+
+ if (kdso->has_build_id) {
+ char filename[PATH_MAX];
+ if (dso__build_id_filename(kdso, filename, sizeof(filename)))
+ printed += fprintf(fp, "[0] %s\n", filename);
+ }

for (i = 0; i < vmlinux_path__nr_entries; ++i)
- printed += fprintf(fp, "[%d] %s\n", i, vmlinux_path[i]);
+ printed += fprintf(fp, "[%d] %s\n",
+ i + kdso->has_build_id, vmlinux_path[i]);

return printed;
}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 5d25b5e..5e02d2c 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -216,6 +216,6 @@ int machines__create_guest_kernel_maps(struct rb_root *self);
int symbol__init(void);
bool symbol_type__is_a(char symbol_type, enum map_type map_type);

-size_t vmlinux_path__fprintf(FILE *fp);
+size_t machine__fprintf_vmlinux_path(struct machine *self, FILE *fp);

#endif /* __PERF_SYMBOL */
--
1.6.2.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [GIT PULL 0/2] perf tui fix and annotate improvement
Next: [PATCH 2/8] PM: suspend_block: Add driver to access suspend blockers from user-space