ui: Improve UX of com.android.AndroidLockContention

Android.bp

@@ -16646,6 +16646,7 @@ genrule {
         "src/trace_processor/perfetto_sql/stdlib/android/job_scheduler.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/job_scheduler_states.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/kernel_wakelocks.sql",
+        "src/trace_processor/perfetto_sql/stdlib/android/lock_contention.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/memory/dmabuf.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/memory/dmabuf_spans.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/memory/heap_graph/class_relationship.sql",

BUILD

@@ -3703,6 +3703,7 @@ perfetto_filegroup(
         "src/trace_processor/perfetto_sql/stdlib/android/job_scheduler.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/job_scheduler_states.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/kernel_wakelocks.sql",
+        "src/trace_processor/perfetto_sql/stdlib/android/lock_contention.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/monitor_contention.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/network_packets.sql",
         "src/trace_processor/perfetto_sql/stdlib/android/oom_adjuster.sql",

src/trace_processor/perfetto_sql/stdlib/android/BUILD.gn

@@ -51,6 +51,7 @@ perfetto_sql_source_set("android") {
     "job_scheduler.sql",
     "job_scheduler_states.sql",
     "kernel_wakelocks.sql",
+    "lock_contention.sql",
     "monitor_contention.sql",
     "network_packets.sql",
     "oom_adjuster.sql",

src/trace_processor/perfetto_sql/stdlib/android/lock_contention.sql

@@ -0,0 +1,87 @@
+INCLUDE PERFETTO MODULE android.monitor_contention;
+
+-- Extracts the owner tid from a lock contention slice name.
+CREATE PERFETTO FUNCTION android_extract_lock_contention_owner_tid(
+    -- Name of the slice.
+    slice_name STRING
+)
+-- The owner tid.
+RETURNS LONG AS
+SELECT
+  cast_int!(STR_SPLIT(STR_SPLIT($slice_name, "(owner tid: ", 1), ")", 0));
+
+-- Contains parsed lock contention events, including the owner tid and blocked/blocking thread names.
+CREATE PERFETTO TABLE android_lock_contention (
+  -- Slice ID.
+  id LONG,
+  -- Timestamp.
+  ts LONG,
+  -- Duration.
+  dur LONG,
+  -- Slice name.
+  name STRING,
+  -- Owner TID.
+  owner_tid LONG,
+  -- Blocked thread name.
+  blocked_thread_name STRING,
+  -- Blocking thread name.
+  blocking_thread_name STRING
+) AS
+SELECT
+  s.id,
+  s.ts,
+  s.dur,
+  s.name,
+  android_extract_lock_contention_owner_tid(s.name) AS owner_tid,
+  bt.name AS blocked_thread_name,
+  obt.name AS blocking_thread_name
+FROM slice AS s
+JOIN thread_track AS tt
+  ON s.track_id = tt.id
+JOIN thread AS bt
+  USING (utid)
+LEFT JOIN thread AS obt
+  ON obt.tid = android_extract_lock_contention_owner_tid(s.name)
+  AND obt.upid = bt.upid
+WHERE
+  s.name GLOB 'Lock contention*' AND s.name GLOB '*(owner tid: *)*';
+
+-- Contains the union of all lock contention events from both ART and Monitor contention sources.
+CREATE PERFETTO TABLE android_all_lock_contentions (
+  -- Slice ID.
+  id LONG,
+  -- Timestamp.
+  ts LONG,
+  -- Duration.
+  dur LONG,
+  -- Slice name.
+  name STRING,
+  -- Owner TID.
+  owner_tid LONG,
+  -- Blocked thread name.
+  blocked_thread_name STRING,
+  -- Blocking thread name.
+  blocking_thread_name STRING
+) AS
+SELECT
+  id,
+  ts,
+  dur,
+  '[Lock Owner] Blocking: ' || name AS name,
+  owner_tid,
+  blocked_thread_name,
+  blocking_thread_name
+FROM android_lock_contention
+UNION ALL
+SELECT
+  id,
+  ts,
+  coalesce(dur, -1) AS dur,
+  '[Lock Owner] Blocking: Lock contention on a monitor lock (owner tid: ' || coalesce(blocking_tid, '-') || ')' AS name,
+  blocking_tid AS owner_tid,
+  blocked_thread_name,
+  blocking_thread_name
+FROM android_monitor_contention_chain;
+
+-- Index on owner_tid to speed up layout window functions.
+CREATE PERFETTO INDEX android_all_lock_contentions_owner_tid ON android_all_lock_contentions(owner_tid);