logd: Add Tag statistics
(cherry pick from commit 344bff4391dd434dda501e812f18f524290c5a7c)
- Optional class of statistics for events Tags
- export tagToName from LogBuffer (located in main.cp to address
https://android-review.googlesource.com/#/c/110204)
- Can not handle dropped because getTag() can not work,
will need to be fixed if we start filtering.
Bug: 19608965
Change-Id: I7b90607ca588bf37bab71f19b1570a290e772776
diff --git a/logd/main.cpp b/logd/main.cpp
index 237c7c1..7b8e94e 100644
--- a/logd/main.cpp
+++ b/logd/main.cpp
@@ -35,6 +35,7 @@
#include <cutils/properties.h>
#include <cutils/sched_policy.h>
#include <cutils/sockets.h>
+#include <log/event_tag_map.h>
#include <private/android_filesystem_config.h>
#include "CommandListener.h"
@@ -238,6 +239,23 @@
sem_post(&reinit);
}
+// tagToName converts an events tag into a name
+const char *android::tagToName(uint32_t tag) {
+ static const EventTagMap *map;
+
+ if (!map) {
+ sem_wait(&sem_name);
+ if (!map) {
+ map = android_openEventTagMap(EVENT_TAG_MAP_FILE);
+ }
+ sem_post(&sem_name);
+ if (!map) {
+ return NULL;
+ }
+ }
+ return android_lookupEventTag(map, tag);
+}
+
// Foreground waits for exit of the main persistent threads
// that are started here. The threads are created to manage
// UNIX domain client sockets for writing, reading and