commit 344bff4391dd434dda501e812f18f524290c5a7c
author Mark Salyzyn <salyzyn@google.com> Mon Apr 13 14:24:45 2015 -0700
committer Mark Salyzyn <salyzyn@google.com> Tue May 12 12:53:27 2015 -0700
tree df6d171ee67b2114f4c398260f12544a137ef074
parent 7297278ade9de51e63568188782f56e2ad2bcf6b

logd: Add Tag statistics

- 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

logd/LogStatistics.h

diff --git a/logd/LogStatistics.h b/logd/LogStatistics.h
index ca4b9a6..d21a75b 100644
--- a/logd/LogStatistics.h
+++ b/logd/LogStatistics.h
@@ -154,8 +154,6 @@
 };
 
 namespace android {
-// caller must own and free character string
-char *pidToName(pid_t pid);
 uid_t pidToUid(pid_t pid);
 }
 
@@ -209,7 +207,28 @@
         }
         EntryBaseDropped::add(e);
     }
+};
 
+struct TagEntry : public EntryBase {
+    const uint32_t tag;
+    uid_t uid;
+
+    TagEntry(LogBufferElement *e):
+        EntryBase(e),
+        tag(e->getTag()),
+        uid(e->getUid()) { }
+
+    const uint32_t&getKey() const { return tag; }
+    const uid_t&getUid() const { return uid; }
+    const char*getName() const { return android::tagToName(tag); }
+
+    inline void add(LogBufferElement *e) {
+        uid_t u = e->getUid();
+        if (uid != u) {
+            uid = -1;
+        }
+        EntryBase::add(e);
+    }
 };
 
 // Log Statistics
@@ -228,6 +247,10 @@
     typedef LogHashtable<pid_t, PidEntry> pidTable_t;
     pidTable_t pidTable;
 
+    // tag list
+    typedef LogHashtable<uint32_t, TagEntry> tagTable_t;
+    tagTable_t tagTable;
+
 public:
     LogStatistics();