Add shmem through

Test: statsd_testdrive
Bug: 267739275

Change-Id: I08fa1330da2677005a78f947e25f7ac785f03c63

services/core/java/com/android/server/stats/pull/ProcfsMemoryUtil.java

@@ -28,7 +28,8 @@ public final class ProcfsMemoryUtil {
             "VmHWM:",
             "VmRSS:",
             "RssAnon:",
-            "VmSwap:"
+            "RssShmem:",
+            "VmSwap:",
     };
     private static final String[] VMSTAT_KEYS = new String[] {
             "oom_kill"
@@ -38,7 +39,7 @@ public final class ProcfsMemoryUtil {
 
     /**
      * Reads memory stats of a process from procfs. Returns values of the VmHWM, VmRss, AnonRSS,
-     * VmSwap fields in /proc/pid/status in kilobytes or null if not available.
+     * VmSwap, RssShmem fields in /proc/pid/status in kilobytes or null if not available.
      */
     @Nullable
     public static MemorySnapshot readMemorySnapshotFromProcfs(int pid) {
@@ -46,8 +47,9 @@ public final class ProcfsMemoryUtil {
         output[0] = -1;
         output[3] = -1;
         output[4] = -1;
+        output[5] = -1;
         Process.readProcLines("/proc/" + pid + "/status", STATUS_KEYS, output);
-        if (output[0] == -1 || output[3] == -1 || output[4] == -1) {
+        if (output[0] == -1 || output[3] == -1 || output[4] == -1 || output[5] == -1) {
             // Could not open or parse file.
             return null;
         }
@@ -56,7 +58,8 @@ public final class ProcfsMemoryUtil {
         snapshot.rssHighWaterMarkInKilobytes = (int) output[1];
         snapshot.rssInKilobytes = (int) output[2];
         snapshot.anonRssInKilobytes = (int) output[3];
-        snapshot.swapInKilobytes = (int) output[4];
+        snapshot.rssShmemKilobytes = (int) output[4];
+        snapshot.swapInKilobytes = (int) output[5];
         return snapshot;
     }
 
@@ -101,6 +104,7 @@ public final class ProcfsMemoryUtil {
         public int rssInKilobytes;
         public int anonRssInKilobytes;
         public int swapInKilobytes;
+        public int rssShmemKilobytes;
     }
 
     /** Reads and parses selected entries of /proc/vmstat. */

services/core/java/com/android/server/stats/pull/StatsPullAtomService.java

@@ -2290,7 +2290,8 @@ public class StatsPullAtomService extends SystemService {
                     managedProcess.processName, managedProcess.pid, managedProcess.oomScore,
                     snapshot.rssInKilobytes, snapshot.anonRssInKilobytes, snapshot.swapInKilobytes,
                     snapshot.anonRssInKilobytes + snapshot.swapInKilobytes,
-                    gpuMemPerPid.get(managedProcess.pid), managedProcess.hasForegroundServices));
+                    gpuMemPerPid.get(managedProcess.pid), managedProcess.hasForegroundServices,
+                    snapshot.rssShmemKilobytes));
         }
         // Complement the data with native system processes. Given these measurements can be taken
         // in response to LMKs happening, we want to first collect the managed app stats (to
@@ -2309,7 +2310,8 @@ public class StatsPullAtomService extends SystemService {
                     -1001 /*Placeholder for native processes, OOM_SCORE_ADJ_MIN - 1.*/,
                     snapshot.rssInKilobytes, snapshot.anonRssInKilobytes, snapshot.swapInKilobytes,
                     snapshot.anonRssInKilobytes + snapshot.swapInKilobytes,
-                    gpuMemPerPid.get(pid), false /* has_foreground_services */));
+                    gpuMemPerPid.get(pid), false /* has_foreground_services */,
+                    snapshot.rssShmemKilobytes));
         }
         return StatsManager.PULL_SUCCESS;
     }