1 files changed, 85 insertions, 0 deletions
diff --git a/src/com/android/settings/development/SystemServerHeapDumpPreferenceController.java b/src/com/android/settings/development/SystemServerHeapDumpPreferenceController.java
new file mode 100644
index 0000000000..e6701ce248
--- /dev/null
+++ b/src/com/android/settings/development/SystemServerHeapDumpPreferenceController.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.development;
+
+import android.app.ActivityManager;
+import android.content.Context;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.os.UserManager;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.preference.Preference;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class SystemServerHeapDumpPreferenceController extends DeveloperOptionsPreferenceController
+        implements PreferenceControllerMixin {
+
+    private static final String KEY_SYSTEM_SERVER_HEAP_DUMP = "system_server_heap_dump";
+
+    /** How long to keep the preference disabled before re-enabling. */
+    private static final long ENABLE_TIMEOUT_MILLIS = 5000L;
+
+    private final UserManager mUserManager;
+
+    private Handler mHandler;
+
+    public SystemServerHeapDumpPreferenceController(Context context) {
+        super(context);
+
+        mUserManager = context.getSystemService(UserManager.class);
+        mHandler = new Handler(Looper.getMainLooper());
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return Build.IS_DEBUGGABLE
+                && !mUserManager.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_SYSTEM_SERVER_HEAP_DUMP;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!KEY_SYSTEM_SERVER_HEAP_DUMP.equals(preference.getKey())) {
+            return false;
+        }
+        try {
+            // Temporarily disable the preference so the user doesn't start two dumps in a row.
+            preference.setEnabled(false);
+            Toast.makeText(mContext, R.string.capturing_system_heap_dump_message,
+                    Toast.LENGTH_SHORT).show();
+            ActivityManager.getService().requestSystemServerHeapDump();
+            mHandler.postDelayed(() -> preference.setEnabled(true), ENABLE_TIMEOUT_MILLIS);
+            return true;
+        } catch (RemoteException e) {
+            Log.e(TAG, "error taking system heap dump", e);
+            Toast.makeText(mContext, R.string.error_capturing_system_heap_dump_message,
+                    Toast.LENGTH_SHORT).show();
+        }
+        return false;
+    }
+}