perf symbols: Set module info when build-id event found

Like machine__findnew_module_dso(), it should set necessary info for
kernel modules to find symbol info from the file.  Factor out
dso__set_module_info() to do it.

This is needed for dso__needs_decompress() to detect such DSOs.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170531120105.21731-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 20 insertions, 11 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index a96a99d2369f..b27d127cdf68 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -335,6 +335,21 @@ int __kmod_path__parse(struct kmod_path *m, const char *path,
         return 0;
 }
 
+void dso__set_module_info(struct dso *dso, struct kmod_path *m,
+                          struct machine *machine)
+{
+        if (machine__is_host(machine))
+                dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
+        else
+                dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
+
+        /* _KMODULE_COMP should be next to _KMODULE */
+        if (m->kmod && m->comp)
+                dso->symtab_type++;
+
+        dso__set_short_name(dso, strdup(m->name), true);
+}
+
 /*
  * Global list of open DSOs and the counter.
  */
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 12350b171727..5fe2ab5877bd 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -259,6 +259,9 @@ int __kmod_path__parse(struct kmod_path *m, const char *path,
 #define kmod_path__parse_name(__m, __p) __kmod_path__parse(__m, __p, true , false)
 #define kmod_path__parse_ext(__m, __p)  __kmod_path__parse(__m, __p, false, true)
 
+void dso__set_module_info(struct dso *dso, struct kmod_path *m,
+                          struct machine *machine);
+
 /*
  * The dso__data_* external interface provides following functions:
  *   dso__data_get_fd
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index c40a4d8acf8b..5cac8d5e009a 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1473,7 +1473,7 @@ static int __event_process_build_id(struct build_id_event *bev,
                         struct kmod_path m = { .name = NULL, };
 
                         if (!kmod_path__parse_name(&m, filename) && m.kmod)
-                                dso__set_short_name(dso, strdup(m.name), true);
+                                dso__set_module_info(dso, &m, machine);
                         else
                                 dso->kernel = dso_type;
 
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index d97e014c3df3..d7f31cb0a4cb 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -572,16 +572,7 @@ static struct dso *machine__findnew_module_dso(struct machine *machine,
                 if (dso == NULL)
                         goto out_unlock;
 
-                if (machine__is_host(machine))
-                        dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
-                else
-                        dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
-
-                /* _KMODULE_COMP should be next to _KMODULE */
-                if (m->kmod && m->comp)
-                        dso->symtab_type++;
-
-                dso__set_short_name(dso, strdup(m->name), true);
+                dso__set_module_info(dso, m, machine);
                 dso__set_long_name(dso, strdup(filename), true);
         }