[PATCH 07/14] perf tools: Use kmod_path__parse for machine__new_dso

[Jiri Olsa]

Using kmod_path__parse to get the module name and update
the dso short name within machine__new_dso function.

This way it's done only first time when dso is created,
unlike the current way when we update it all the time
we process memory map of the kernel module.

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
---
 tools/perf/util/machine.c | 57 +++++++++++++++++------------------------------
 1 file changed, 20 insertions(+), 37 deletions(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 14f7caf4824a..5a58cdd141ae 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -460,14 +460,15 @@ int machine__process_lost_event(struct machine *machine __maybe_unused,
 	return 0;
 }
 
-static struct dso *machine__module_dso(struct machine *machine, const char *filename)
+static struct dso*
+machine__module_dso(struct machine *machine, struct kmod_path *m,
+		    const char *filename)
 {
 	struct dso *dso;
-	bool compressed;
 
-	dso = dsos__find(&machine->kernel_dsos, filename, false);
+	dso = dsos__find(&machine->kernel_dsos, m->name, true);
 	if (!dso) {
-		dso = dsos__new(&machine->kernel_dsos, filename);
+		dso = dsos__new(&machine->kernel_dsos, m->name);
 		if (dso == NULL)
 			return NULL;
 
@@ -477,8 +478,11 @@ static struct dso *machine__module_dso(struct machine *machine, const char *file
 			dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
 
 		/* _KMODULE_COMP should be next to _KMODULE */
-		if (is_kernel_module(filename, &compressed) && compressed)
+		if (m->kmod && m->comp)
 			dso->symtab_type++;
+
+		dso__set_short_name(dso, strdup(m->name), true);
+		dso__set_long_name(dso, strdup(filename), true);
 	}
 
 	return dso;
@@ -488,16 +492,24 @@ struct map *machine__new_module(struct machine *machine, u64 start,
 				const char *filename)
 {
 	struct map *map;
-	struct dso *dso = machine__module_dso(machine, filename);
+	struct dso *dso;
+	struct kmod_path m;
 
-	if (dso == NULL)
+	if (kmod_path__parse_name(&m, filename))
 		return NULL;
 
+	dso = machine__module_dso(machine, &m, filename);
+	if (dso == NULL)
+		goto out;
+
 	map = map__new2(start, dso, MAP__FUNCTION);
 	if (map == NULL)
-		return NULL;
+		goto out;
 
 	map_groups__insert(&machine->kmaps, map);
+
+out:
+	free(m.name);
 	return map;
 }
 
@@ -1058,40 +1070,11 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
 				strlen(kmmap_prefix) - 1) == 0;
 	if (event->mmap.filename[0] == '/' ||
 	    (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
-
-		char short_module_name[1024];
-		char *name, *dot;
-
-		if (event->mmap.filename[0] == '/') {
-			name = strrchr(event->mmap.filename, '/');
-			if (name == NULL)
-				goto out_problem;
-
-			++name; /* skip / */
-			dot = strrchr(name, '.');
-			if (dot == NULL)
-				goto out_problem;
-			/* On some system, modules are compressed like .ko.gz */
-			if (is_supported_compression(dot + 1))
-				dot -= 3;
-			if (!is_kmodule_extension(dot + 1))
-				goto out_problem;
-			snprintf(short_module_name, sizeof(short_module_name),
-					"[%.*s]", (int)(dot - name), name);
-			strxfrchar(short_module_name, '-', '_');
-		} else
-			strcpy(short_module_name, event->mmap.filename);
-
 		map = machine__new_module(machine, event->mmap.start,
 					  event->mmap.filename);
 		if (map == NULL)
 			goto out_problem;
 
-		name = strdup(short_module_name);
-		if (name == NULL)
-			goto out_problem;
-
-		dso__set_short_name(map->dso, name, true);
 		map->end = map->start + event->mmap.len;
 	} else if (is_kernel_mmap) {
 		const char *symbol_name = (event->mmap.filename +
-- 
1.9.3

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