Android Perfetto 系列 14：heapprofd 与内存 Profiling

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WITH target_process AS (
  SELECT upid, pid, name, cmdline
  FROM process
  WHERE name = 'com.example.app'
  ORDER BY start_ts DESC
  LIMIT 1
),
target_dump AS (
  SELECT MAX(ts_end) AS dump_ts
  FROM heap_profile
  WHERE upid = (SELECT upid FROM target_process)
    AND heap_name = 'libc.malloc'
)
SELECT
  d.dump_ts,
  p.upid,
  p.pid,
  p.name AS process_name,
  p.cmdline AS process_cmdline,
  a.callsite_id,
  f.name AS frame_name,
  m.name AS mapping_name,
  SUM(a.size) / 1024.0 / 1024.0 AS leaf_unreleased_mb,
  SUM(a.count) AS unreleased_count
FROM heap_profile_allocation a
JOIN target_process p USING (upid)
JOIN target_dump d ON a.ts <= d.dump_ts
JOIN stack_profile_callsite c ON a.callsite_id = c.id
JOIN stack_profile_frame f ON c.frame_id = f.id
JOIN stack_profile_mapping m ON f.mapping = m.id
WHERE a.heap_name = 'libc.malloc'
GROUP BY d.dump_ts, p.upid, p.pid, p.name, p.cmdline, a.callsite_id, f.name, m.name
HAVING leaf_unreleased_mb > 0
ORDER BY dump_ts DESC, leaf_unreleased_mb DESC
LIMIT 50;