Merge changes from topic "ddr_size_api" am: c12a383385 am: a4ed6716da am: 12ffdf5523

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2193505

Change-Id: Icc0df936abdc8ee6ce89400d4c5340ac1b56f0ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

5 files changed, 37 insertions, 0 deletions

diff --git a/core/api/current.txt b/core/api/current.txt
index 644a194f6ed1..05e2a9aa7286 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -4415,6 +4415,7 @@ package android.app {
     method public void readFromParcel(android.os.Parcel);
     method public void writeToParcel(android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.app.ActivityManager.MemoryInfo> CREATOR;
+    field public long advertisedMem;
     field public long availMem;
     field public boolean lowMemory;
     field public long threshold;
diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index 5d1d225f4d2d..6f9a98d8313f 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -29,6 +29,7 @@ import android.annotation.IntRange;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
+import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
@@ -2813,6 +2814,15 @@ public class ActivityManager {
      */
     public static class MemoryInfo implements Parcelable {
         /**
+         * The advertised memory of the system, as the end user would encounter in a retail display
+         * environment. This value might be different from {@code totalMem}. This could be due to
+         * many reasons. For example, the ODM could reserve part of the memory for the Trusted
+         * Execution Environment (TEE) which the kernel doesn't have access or knowledge about it.
+         */
+        @SuppressLint("MutableBareField")
+        public long advertisedMem;
+
+        /**
          * The available memory on the system.  This number should not
          * be considered absolute: due to the nature of the kernel, a significant
          * portion of this memory is actually in use and needed for the overall
@@ -2861,6 +2871,7 @@ public class ActivityManager {
         }
 
         public void writeToParcel(Parcel dest, int flags) {
+            dest.writeLong(advertisedMem);
             dest.writeLong(availMem);
             dest.writeLong(totalMem);
             dest.writeLong(threshold);
@@ -2872,6 +2883,7 @@ public class ActivityManager {
         }
 
         public void readFromParcel(Parcel source) {
+            advertisedMem = source.readLong();
             availMem = source.readLong();
             totalMem = source.readLong();
             threshold = source.readLong();
diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index e06e7326a860..b3afaecca849 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -26,6 +26,7 @@ import android.annotation.TestApi;
 import android.annotation.UptimeMillisLong;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build.VERSION_CODES;
+import android.sysprop.MemoryProperties;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.OsConstants;
@@ -1336,6 +1337,24 @@ public class Process {
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P)
     public static final native void sendSignalQuiet(int pid, int signal);
 
+    /**
+     * @return The advertised memory of the system, as the end user would encounter in a retail
+     * display environment. If the advertised memory is not defined, it returns
+     * {@code getTotalMemory()} rounded.
+     *
+     * @hide
+     */
+    public static final long getAdvertisedMem() {
+        String formatSize = MemoryProperties.memory_ddr_size().orElse("0KB");
+        long memSize = FileUtils.parseSize(formatSize);
+
+        if (memSize == Long.MIN_VALUE) {
+            return FileUtils.roundStorageSize(getTotalMemory());
+        }
+
+        return memSize;
+    }
+
     /** @hide */
     @UnsupportedAppUsage
     public static final native long getFreeMemory();
diff --git a/core/tests/coretests/src/android/os/ProcessTest.java b/core/tests/coretests/src/android/os/ProcessTest.java
index ae4edb97aab0..52846dfbb14b 100644
--- a/core/tests/coretests/src/android/os/ProcessTest.java
+++ b/core/tests/coretests/src/android/os/ProcessTest.java
@@ -72,4 +72,7 @@ public class ProcessTest extends TestCase {
         assertEquals(-1, Process.getThreadGroupLeader(BAD_PID));
     }
 
+    public void testGetAdvertisedMem() {
+        assertTrue(Process.getTotalMemory() <= Process.getAdvertisedMem());
+    }
 }
diff --git a/services/core/java/com/android/server/am/ProcessList.java b/services/core/java/com/android/server/am/ProcessList.java
index 178b6bbe755e..eb6a3b3a3cea 100644
--- a/services/core/java/com/android/server/am/ProcessList.java
+++ b/services/core/java/com/android/server/am/ProcessList.java
@@ -27,6 +27,7 @@ import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_INPUT;
 import static android.os.Process.SYSTEM_UID;
 import static android.os.Process.THREAD_PRIORITY_BACKGROUND;
 import static android.os.Process.ZYGOTE_POLICY_FLAG_EMPTY;
+import static android.os.Process.getAdvertisedMem;
 import static android.os.Process.getFreeMemory;
 import static android.os.Process.getTotalMemory;
 import static android.os.Process.killProcessQuiet;
@@ -1524,6 +1525,7 @@ public final class ProcessList {
     void getMemoryInfo(ActivityManager.MemoryInfo outInfo) {
         final long homeAppMem = getMemLevel(HOME_APP_ADJ);
         final long cachedAppMem = getMemLevel(CACHED_APP_MIN_ADJ);
+        outInfo.advertisedMem = getAdvertisedMem();
         outInfo.availMem = getFreeMemory();
         outInfo.totalMem = getTotalMemory();
         outInfo.threshold = homeAppMem;