ZenModeHelper: fix cross deadlock with AudioService
Processing ZenModeHelper.setConfig() synchronously in
ZenModeConditions.onConditionChanged() can cause a cross deadlock between
ConditionProviders.mMutex and AudioService.mSettingsLock.
Add a method to set Zen mode config asynchronously.
Bug: 24528290.
Change-Id: I9c1701ca6bef084527821175d84002b612241995
diff --git a/services/core/java/com/android/server/notification/ZenModeConditions.java b/services/core/java/com/android/server/notification/ZenModeConditions.java
index b89a654..c2e4349 100644
--- a/services/core/java/com/android/server/notification/ZenModeConditions.java
+++ b/services/core/java/com/android/server/notification/ZenModeConditions.java
@@ -104,7 +104,7 @@
public void onServiceAdded(ComponentName component) {
if (DEBUG) Log.d(TAG, "onServiceAdded " + component);
if (isAutomaticActive(component)) {
- mHelper.setConfig(mHelper.getConfig(), "zmc.onServiceAdded");
+ mHelper.setConfigAsync(mHelper.getConfig(), "zmc.onServiceAdded");
}
}
@@ -120,7 +120,7 @@
updated |= updateSnoozing(automaticRule);
}
if (updated) {
- mHelper.setConfig(config, "conditionChanged");
+ mHelper.setConfigAsync(config, "conditionChanged");
}
}
diff --git a/services/core/java/com/android/server/notification/ZenModeHelper.java b/services/core/java/com/android/server/notification/ZenModeHelper.java
index 57d7758..461c3a2 100644
--- a/services/core/java/com/android/server/notification/ZenModeHelper.java
+++ b/services/core/java/com/android/server/notification/ZenModeHelper.java
@@ -315,6 +315,10 @@
return setConfig(config, reason, true /*setRingerMode*/);
}
+ public void setConfigAsync(ZenModeConfig config, String reason) {
+ mHandler.postSetConfig(config, reason);
+ }
+
private boolean setConfig(ZenModeConfig config, String reason, boolean setRingerMode) {
if (config == null || !config.isValid()) {
Log.w(TAG, "Invalid config in setConfig; " + config);
@@ -743,6 +747,17 @@
private final class H extends Handler {
private static final int MSG_DISPATCH = 1;
private static final int MSG_METRICS = 2;
+ private static final int MSG_SET_CONFIG = 3;
+
+ private final class ConfigMessageData {
+ public final ZenModeConfig config;
+ public final String reason;
+
+ ConfigMessageData(ZenModeConfig config, String reason) {
+ this.config = config;
+ this.reason = reason;
+ }
+ }
private static final long METRICS_PERIOD_MS = 6 * 60 * 60 * 1000;
@@ -760,6 +775,10 @@
sendEmptyMessageDelayed(MSG_METRICS, METRICS_PERIOD_MS);
}
+ private void postSetConfig(ZenModeConfig config, String reason) {
+ sendMessage(obtainMessage(MSG_SET_CONFIG, new ConfigMessageData(config, reason)));
+ }
+
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
@@ -769,6 +788,10 @@
case MSG_METRICS:
mMetrics.emit();
break;
+ case MSG_SET_CONFIG:
+ ConfigMessageData configData = (ConfigMessageData)msg.obj;
+ setConfig(configData.config, configData.reason);
+ break;
}
}
}