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authorArnaldo Carvalho de Melo <acme@redhat.com>2010-05-26 13:26:02 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-05-26 13:26:02 -0300
commit5ad90e4ea4a096af9f0a362e34dfae5686a191ef (patch)
treef537aae3fd9e04395658c19cc97a401431c972fa
parent62e3436b5f3461662929eae102beefbd12127cb1 (diff)
downloadblackbird-op-linux-5ad90e4ea4a096af9f0a362e34dfae5686a191ef.tar.gz
blackbird-op-linux-5ad90e4ea4a096af9f0a362e34dfae5686a191ef.zip
perf symbols: Add the build id cache to the vmlinux path
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@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/builtin-top.c2
-rw-r--r--tools/perf/util/symbol.c27
-rw-r--r--tools/perf/util/symbol.h2
3 files changed, 25 insertions, 6 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 397290a0a76e..a66f4272b994 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 aaa51ba147df..7fd6b151feb5 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 5d25b5eb1456..5e02d2c17154 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 */
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