Add heap dump options to Developer options.

1. Add a button to capture a system heap dump on demand.
2. Add a toggle to enable/disable automatic system heap dump captures.

Bug: 77490269
Test: manual
Change-Id: I12b41de82f641ae239ea8e48f0180392aca5dbe8

res/xml/development_settings.xml

@@ -35,6 +35,10 @@
             android:title="@*android:string/bugreport_title"
             android:dialogTitle="@*android:string/bugreport_title" />
 
+        <Preference
+            android:key="system_server_heap_dump"
+            android:title="@string/capture_system_heap_dump_title" />
+
         <Preference
             android:key="local_backup_password"
             android:title="@string/local_backup_password_title"
@@ -151,6 +155,11 @@
             android:title="@string/bugreport_in_power"
             android:summary="@string/bugreport_in_power_summary" />
 
+        <SwitchPreference
+            android:key="automatic_system_server_heap_dumps"
+            android:title="@string/automatic_system_heap_dump_title"
+            android:summary="@string/automatic_system_heap_dump_summary" />
+
         <Preference android:key="mock_location_app"
                     android:title="@string/mock_location_app" />
 

src/com/android/settings/development/AutomaticSystemServerHeapDumpPreferenceController.java

@@ -0,0 +1,84 @@
+/*
+ * 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.content.Context;
+import android.os.Build;
+import android.os.UserManager;
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class AutomaticSystemServerHeapDumpPreferenceController extends
+        DeveloperOptionsPreferenceController implements Preference.OnPreferenceChangeListener,
+        PreferenceControllerMixin {
+
+    private static final String KEY_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS =
+            "automatic_system_server_heap_dumps";
+
+    private static final int SETTING_VALUE_OFF = 0;
+    private static final int SETTING_VALUE_ON = 1;
+
+    private final UserManager mUserManager;
+    private final boolean mIsConfigEnabled;
+
+    public AutomaticSystemServerHeapDumpPreferenceController(Context context) {
+        super(context);
+        mIsConfigEnabled = context.getResources().getBoolean(
+                com.android.internal.R.bool.config_debugEnableAutomaticSystemServerHeapDumps);
+        mUserManager = context.getSystemService(UserManager.class);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return Build.IS_DEBUGGABLE && mIsConfigEnabled
+                && !mUserManager.hasUserRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Global.ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS,
+                isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF);
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        final int mode = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Global.ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS, SETTING_VALUE_ON);
+        ((SwitchPreference) mPreference).setChecked(mode != SETTING_VALUE_OFF);
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Global.ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS, SETTING_VALUE_OFF);
+        ((SwitchPreference) mPreference).setChecked(false);
+    }
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -404,6 +404,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
         controllers.add(new MemoryUsagePreferenceController(context));
         controllers.add(new BugReportPreferenceController(context));
+        controllers.add(new SystemServerHeapDumpPreferenceController(context));
         controllers.add(new LocalBackupPasswordPreferenceController(context));
         controllers.add(new StayAwakePreferenceController(context, lifecycle));
         controllers.add(new HdcpCheckingPreferenceController(context));
@@ -418,6 +419,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new ClearAdbKeysPreferenceController(context, fragment));
         controllers.add(new LocalTerminalPreferenceController(context));
         controllers.add(new BugReportInPowerPreferenceController(context));
+        controllers.add(new AutomaticSystemServerHeapDumpPreferenceController(context));
         controllers.add(new MockLocationAppPreferenceController(context, fragment));
         controllers.add(new DebugViewAttributesPreferenceController(context));
         controllers.add(new SelectDebugAppPreferenceController(context, fragment));

src/com/android/settings/development/SystemServerHeapDumpPreferenceController.java

@@ -0,0 +1,84 @@
+/*
+ * 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.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();
+    }
+
+    @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;
+    }
+}