AI 148333: Evidence from failures, and inspection of source, leads me to believe
that SharedPreferences has some non-thread-safe paths. As a quick, brute-force workaround, I'm putting a global lock around our use of it. This is a bit inefficient, but cases of multiple threads writing to it should be very rare. Note, we don't have an explicit test for this (I will think about finding a way to write one), but the evidence of this failure is that after some amount of activity in the Email app, we see corruption in the string mSenderUri. BUG=1822859 Automated import of CL 148333
This commit is contained in:
Andy Stadler
The Android Open Source Project
parent
843125b98a
commit
5293030ba0
@ -111,52 +111,60 @@ public class Account implements Serializable {
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*/
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public void refresh(Preferences preferences) {
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mPreferences = preferences;
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/**
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* Note: Until we have resolved the potential for synchronization failures in
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* SharedPreferences, we're going to do a global lock around the read and write
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* functions.
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*/
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synchronized (Account.class) {
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mStoreUri = Utility.base64Decode(preferences.mSharedPreferences.getString(mUuid
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+ ".storeUri", null));
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mLocalStoreUri = preferences.mSharedPreferences.getString(mUuid + ".localStoreUri", null);
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String senderText = preferences.mSharedPreferences.getString(mUuid + ".senderUri", null);
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if (senderText == null) {
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// Preference ".senderUri" was called ".transportUri" in earlier versions, so we'll
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// do a simple upgrade here when necessary.
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senderText = preferences.mSharedPreferences.getString(mUuid + ".transportUri", null);
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mStoreUri = Utility.base64Decode(preferences.mSharedPreferences.getString(mUuid
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+ ".storeUri", null));
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mLocalStoreUri = preferences.mSharedPreferences.getString(mUuid + ".localStoreUri", null);
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String senderText = preferences.mSharedPreferences.getString(mUuid + ".senderUri", null);
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if (senderText == null) {
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// Preference ".senderUri" was called ".transportUri" in earlier versions, so we'll
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// do a simple upgrade here when necessary.
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senderText = preferences.mSharedPreferences.getString(mUuid + ".transportUri", null);
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}
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mSenderUri = Utility.base64Decode(senderText);
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mDescription = preferences.mSharedPreferences.getString(mUuid + ".description", null);
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mName = preferences.mSharedPreferences.getString(mUuid + ".name", mName);
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mEmail = preferences.mSharedPreferences.getString(mUuid + ".email", mEmail);
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mAutomaticCheckIntervalMinutes = preferences.mSharedPreferences.getInt(mUuid
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+ ".automaticCheckIntervalMinutes", -1);
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mLastAutomaticCheckTime = preferences.mSharedPreferences.getLong(mUuid
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+ ".lastAutomaticCheckTime", 0);
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mNotifyNewMail = preferences.mSharedPreferences.getBoolean(mUuid + ".notifyNewMail",
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false);
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// delete policy was incorrectly set on earlier versions, so we'll upgrade it here.
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// rule: if IMAP account and policy = 0 ("never"), change policy to 2 ("on delete")
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mDeletePolicy = preferences.mSharedPreferences.getInt(mUuid + ".deletePolicy", 0);
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if (mDeletePolicy == DELETE_POLICY_NEVER &&
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mStoreUri != null && mStoreUri.toString().startsWith(Store.STORE_SCHEME_IMAP)) {
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mDeletePolicy = DELETE_POLICY_ON_DELETE;
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}
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mDraftsFolderName = preferences.mSharedPreferences.getString(mUuid + ".draftsFolderName",
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"Drafts");
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mSentFolderName = preferences.mSharedPreferences.getString(mUuid + ".sentFolderName",
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"Sent");
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mTrashFolderName = preferences.mSharedPreferences.getString(mUuid + ".trashFolderName",
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"Trash");
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mOutboxFolderName = preferences.mSharedPreferences.getString(mUuid + ".outboxFolderName",
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"Outbox");
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mAccountNumber = preferences.mSharedPreferences.getInt(mUuid + ".accountNumber", 0);
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mVibrate = preferences.mSharedPreferences.getBoolean(mUuid + ".vibrate", false);
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mRingtoneUri = preferences.mSharedPreferences.getString(mUuid + ".ringtone",
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"content://settings/system/notification_sound");
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mSyncWindow = preferences.mSharedPreferences.getInt(mUuid + KEY_SYNC_WINDOW,
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SYNC_WINDOW_USER);
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}
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mSenderUri = Utility.base64Decode(senderText);
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mDescription = preferences.mSharedPreferences.getString(mUuid + ".description", null);
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mName = preferences.mSharedPreferences.getString(mUuid + ".name", mName);
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mEmail = preferences.mSharedPreferences.getString(mUuid + ".email", mEmail);
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mAutomaticCheckIntervalMinutes = preferences.mSharedPreferences.getInt(mUuid
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+ ".automaticCheckIntervalMinutes", -1);
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mLastAutomaticCheckTime = preferences.mSharedPreferences.getLong(mUuid
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+ ".lastAutomaticCheckTime", 0);
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mNotifyNewMail = preferences.mSharedPreferences.getBoolean(mUuid + ".notifyNewMail",
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false);
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// delete policy was incorrectly set on earlier versions, so we'll upgrade it here.
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// rule: if IMAP account and policy = 0 ("never"), change policy to 2 ("on delete")
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mDeletePolicy = preferences.mSharedPreferences.getInt(mUuid + ".deletePolicy", 0);
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if (mDeletePolicy == DELETE_POLICY_NEVER &&
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mStoreUri != null && mStoreUri.toString().startsWith(Store.STORE_SCHEME_IMAP)) {
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mDeletePolicy = DELETE_POLICY_ON_DELETE;
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}
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mDraftsFolderName = preferences.mSharedPreferences.getString(mUuid + ".draftsFolderName",
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"Drafts");
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mSentFolderName = preferences.mSharedPreferences.getString(mUuid + ".sentFolderName",
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"Sent");
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mTrashFolderName = preferences.mSharedPreferences.getString(mUuid + ".trashFolderName",
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"Trash");
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mOutboxFolderName = preferences.mSharedPreferences.getString(mUuid + ".outboxFolderName",
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"Outbox");
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mAccountNumber = preferences.mSharedPreferences.getInt(mUuid + ".accountNumber", 0);
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mVibrate = preferences.mSharedPreferences.getBoolean(mUuid + ".vibrate", false);
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mRingtoneUri = preferences.mSharedPreferences.getString(mUuid + ".ringtone",
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"content://settings/system/notification_sound");
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mSyncWindow = preferences.mSharedPreferences.getInt(mUuid + KEY_SYNC_WINDOW,
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SYNC_WINDOW_USER);
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}
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public String getUuid() {
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@ -220,110 +228,124 @@ public class Account implements Serializable {
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}
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public void delete(Preferences preferences) {
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String[] uuids = preferences.mSharedPreferences.getString("accountUuids", "").split(",");
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StringBuffer sb = new StringBuffer();
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for (int i = 0, length = uuids.length; i < length; i++) {
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if (!uuids[i].equals(mUuid)) {
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if (sb.length() > 0) {
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sb.append(',');
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/**
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* Note: Until we have resolved the potential for synchronization failures in
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* SharedPreferences, we're going to do a global lock around the read and write
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* functions.
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*/
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synchronized (Account.class) {
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String[] uuids = preferences.mSharedPreferences.getString("accountUuids", "").split(",");
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StringBuffer sb = new StringBuffer();
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for (int i = 0, length = uuids.length; i < length; i++) {
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if (!uuids[i].equals(mUuid)) {
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if (sb.length() > 0) {
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sb.append(',');
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}
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sb.append(uuids[i]);
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}
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sb.append(uuids[i]);
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}
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String accountUuids = sb.toString();
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SharedPreferences.Editor editor = preferences.mSharedPreferences.edit();
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editor.putString("accountUuids", accountUuids);
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editor.remove(mUuid + ".storeUri");
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editor.remove(mUuid + ".localStoreUri");
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editor.remove(mUuid + ".senderUri");
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editor.remove(mUuid + ".description");
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editor.remove(mUuid + ".name");
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editor.remove(mUuid + ".email");
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editor.remove(mUuid + ".automaticCheckIntervalMinutes");
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editor.remove(mUuid + ".lastAutomaticCheckTime");
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editor.remove(mUuid + ".notifyNewMail");
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editor.remove(mUuid + ".deletePolicy");
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editor.remove(mUuid + ".draftsFolderName");
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editor.remove(mUuid + ".sentFolderName");
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editor.remove(mUuid + ".trashFolderName");
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editor.remove(mUuid + ".outboxFolderName");
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editor.remove(mUuid + ".accountNumber");
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editor.remove(mUuid + ".vibrate");
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editor.remove(mUuid + ".ringtone");
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editor.remove(mUuid + KEY_SYNC_WINDOW);
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// also delete any deprecated fields
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editor.remove(mUuid + ".transportUri");
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editor.commit();
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}
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String accountUuids = sb.toString();
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SharedPreferences.Editor editor = preferences.mSharedPreferences.edit();
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editor.putString("accountUuids", accountUuids);
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editor.remove(mUuid + ".storeUri");
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editor.remove(mUuid + ".localStoreUri");
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editor.remove(mUuid + ".senderUri");
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editor.remove(mUuid + ".description");
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editor.remove(mUuid + ".name");
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editor.remove(mUuid + ".email");
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editor.remove(mUuid + ".automaticCheckIntervalMinutes");
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editor.remove(mUuid + ".lastAutomaticCheckTime");
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editor.remove(mUuid + ".notifyNewMail");
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editor.remove(mUuid + ".deletePolicy");
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editor.remove(mUuid + ".draftsFolderName");
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editor.remove(mUuid + ".sentFolderName");
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editor.remove(mUuid + ".trashFolderName");
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editor.remove(mUuid + ".outboxFolderName");
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editor.remove(mUuid + ".accountNumber");
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editor.remove(mUuid + ".vibrate");
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editor.remove(mUuid + ".ringtone");
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editor.remove(mUuid + KEY_SYNC_WINDOW);
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// also delete any deprecated fields
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editor.remove(mUuid + ".transportUri");
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editor.commit();
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}
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public void save(Preferences preferences) {
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mPreferences = preferences;
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if (!preferences.mSharedPreferences.getString("accountUuids", "").contains(mUuid)) {
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/*
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* When the account is first created we assign it a unique account number. The
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* account number will be unique to that account for the lifetime of the account.
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* So, we get all the existing account numbers, sort them ascending, loop through
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* the list and check if the number is greater than 1 + the previous number. If so
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* we use the previous number + 1 as the account number. This refills gaps.
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* mAccountNumber starts as -1 on a newly created account. It must be -1 for this
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* algorithm to work.
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*
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* I bet there is a much smarter way to do this. Anyone like to suggest it?
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*/
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Account[] accounts = preferences.getAccounts();
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int[] accountNumbers = new int[accounts.length];
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for (int i = 0; i < accounts.length; i++) {
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accountNumbers[i] = accounts[i].getAccountNumber();
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}
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Arrays.sort(accountNumbers);
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for (int accountNumber : accountNumbers) {
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if (accountNumber > mAccountNumber + 1) {
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break;
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/**
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* Note: Until we have resolved the potential for synchronization failures in
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* SharedPreferences, we're going to do a global lock around the read and write
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* functions.
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*/
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synchronized (Account.class) {
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if (!preferences.mSharedPreferences.getString("accountUuids", "").contains(mUuid)) {
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/*
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* When the account is first created we assign it a unique account number. The
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* account number will be unique to that account for the lifetime of the account.
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* So, we get all the existing account numbers, sort them ascending, loop through
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* the list and check if the number is greater than 1 + the previous number. If so
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* we use the previous number + 1 as the account number. This refills gaps.
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* mAccountNumber starts as -1 on a newly created account. It must be -1 for this
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* algorithm to work.
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*
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* I bet there is a much smarter way to do this. Anyone like to suggest it?
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*/
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Account[] accounts = preferences.getAccounts();
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int[] accountNumbers = new int[accounts.length];
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for (int i = 0; i < accounts.length; i++) {
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accountNumbers[i] = accounts[i].getAccountNumber();
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}
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mAccountNumber = accountNumber;
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Arrays.sort(accountNumbers);
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for (int accountNumber : accountNumbers) {
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if (accountNumber > mAccountNumber + 1) {
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break;
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}
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mAccountNumber = accountNumber;
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}
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mAccountNumber++;
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String accountUuids = preferences.mSharedPreferences.getString("accountUuids", "");
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accountUuids += (accountUuids.length() != 0 ? "," : "") + mUuid;
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SharedPreferences.Editor editor = preferences.mSharedPreferences.edit();
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editor.putString("accountUuids", accountUuids);
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editor.commit();
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}
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mAccountNumber++;
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String accountUuids = preferences.mSharedPreferences.getString("accountUuids", "");
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accountUuids += (accountUuids.length() != 0 ? "," : "") + mUuid;
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SharedPreferences.Editor editor = preferences.mSharedPreferences.edit();
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editor.putString("accountUuids", accountUuids);
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editor.putString(mUuid + ".storeUri", Utility.base64Encode(mStoreUri));
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editor.putString(mUuid + ".localStoreUri", mLocalStoreUri);
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editor.putString(mUuid + ".senderUri", Utility.base64Encode(mSenderUri));
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editor.putString(mUuid + ".description", mDescription);
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editor.putString(mUuid + ".name", mName);
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editor.putString(mUuid + ".email", mEmail);
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editor.putInt(mUuid + ".automaticCheckIntervalMinutes", mAutomaticCheckIntervalMinutes);
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editor.putLong(mUuid + ".lastAutomaticCheckTime", mLastAutomaticCheckTime);
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editor.putBoolean(mUuid + ".notifyNewMail", mNotifyNewMail);
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editor.putInt(mUuid + ".deletePolicy", mDeletePolicy);
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editor.putString(mUuid + ".draftsFolderName", mDraftsFolderName);
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editor.putString(mUuid + ".sentFolderName", mSentFolderName);
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editor.putString(mUuid + ".trashFolderName", mTrashFolderName);
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editor.putString(mUuid + ".outboxFolderName", mOutboxFolderName);
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editor.putInt(mUuid + ".accountNumber", mAccountNumber);
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editor.putBoolean(mUuid + ".vibrate", mVibrate);
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editor.putString(mUuid + ".ringtone", mRingtoneUri);
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editor.putInt(mUuid + KEY_SYNC_WINDOW, mSyncWindow);
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// The following fields are *not* written because they need to be more fine-grained
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// and not risk rewriting with old data.
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// editor.putString(mUuid + PREF_TAG_STORE_PERSISTENT, mStorePersistent);
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// also delete any deprecated fields
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editor.remove(mUuid + ".transportUri");
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editor.commit();
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}
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SharedPreferences.Editor editor = preferences.mSharedPreferences.edit();
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editor.putString(mUuid + ".storeUri", Utility.base64Encode(mStoreUri));
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editor.putString(mUuid + ".localStoreUri", mLocalStoreUri);
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editor.putString(mUuid + ".senderUri", Utility.base64Encode(mSenderUri));
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editor.putString(mUuid + ".description", mDescription);
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editor.putString(mUuid + ".name", mName);
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editor.putString(mUuid + ".email", mEmail);
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editor.putInt(mUuid + ".automaticCheckIntervalMinutes", mAutomaticCheckIntervalMinutes);
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editor.putLong(mUuid + ".lastAutomaticCheckTime", mLastAutomaticCheckTime);
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editor.putBoolean(mUuid + ".notifyNewMail", mNotifyNewMail);
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editor.putInt(mUuid + ".deletePolicy", mDeletePolicy);
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editor.putString(mUuid + ".draftsFolderName", mDraftsFolderName);
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editor.putString(mUuid + ".sentFolderName", mSentFolderName);
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editor.putString(mUuid + ".trashFolderName", mTrashFolderName);
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editor.putString(mUuid + ".outboxFolderName", mOutboxFolderName);
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editor.putInt(mUuid + ".accountNumber", mAccountNumber);
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editor.putBoolean(mUuid + ".vibrate", mVibrate);
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editor.putString(mUuid + ".ringtone", mRingtoneUri);
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editor.putInt(mUuid + KEY_SYNC_WINDOW, mSyncWindow);
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// The following fields are *not* written because they need to be more fine-grained
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// and not risk rewriting with old data.
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// editor.putString(mUuid + PREF_TAG_STORE_PERSISTENT, mStorePersistent);
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// also delete any deprecated fields
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editor.remove(mUuid + ".transportUri");
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editor.commit();
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}
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@Override
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Loading…
Reference in New Issue
Block a user