diff options
Diffstat (limited to 'services/core/java/com/android/server/am/ContentProviderRecord.java')
-rw-r--r-- | services/core/java/com/android/server/am/ContentProviderRecord.java | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/am/ContentProviderRecord.java b/services/core/java/com/android/server/am/ContentProviderRecord.java new file mode 100644 index 0000000..646b7d2 --- /dev/null +++ b/services/core/java/com/android/server/am/ContentProviderRecord.java @@ -0,0 +1,252 @@ +/* + * Copyright (C) 2006 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.server.am; + +import android.app.IActivityManager.ContentProviderHolder; +import android.content.ComponentName; +import android.content.IContentProvider; +import android.content.pm.ApplicationInfo; +import android.content.pm.ProviderInfo; +import android.os.IBinder; +import android.os.IBinder.DeathRecipient; +import android.os.Process; +import android.os.RemoteException; +import android.os.UserHandle; +import android.util.Slog; + +import java.io.PrintWriter; +import java.util.ArrayList; +import java.util.HashMap; +import java.util.HashSet; + +final class ContentProviderRecord { + final ActivityManagerService service; + public final ProviderInfo info; + final int uid; + final ApplicationInfo appInfo; + final ComponentName name; + final boolean singleton; + public IContentProvider provider; + public boolean noReleaseNeeded; + // All attached clients + final ArrayList<ContentProviderConnection> connections + = new ArrayList<ContentProviderConnection>(); + //final HashSet<ProcessRecord> clients = new HashSet<ProcessRecord>(); + // Handles for non-framework processes supported by this provider + HashMap<IBinder, ExternalProcessHandle> externalProcessTokenToHandle; + // Count for external process for which we have no handles. + int externalProcessNoHandleCount; + ProcessRecord proc; // if non-null, hosting process. + ProcessRecord launchingApp; // if non-null, waiting for this app to be launched. + String stringName; + String shortStringName; + + public ContentProviderRecord(ActivityManagerService _service, ProviderInfo _info, + ApplicationInfo ai, ComponentName _name, boolean _singleton) { + service = _service; + info = _info; + uid = ai.uid; + appInfo = ai; + name = _name; + singleton = _singleton; + noReleaseNeeded = uid == 0 || uid == Process.SYSTEM_UID; + } + + public ContentProviderRecord(ContentProviderRecord cpr) { + service = cpr.service; + info = cpr.info; + uid = cpr.uid; + appInfo = cpr.appInfo; + name = cpr.name; + singleton = cpr.singleton; + noReleaseNeeded = cpr.noReleaseNeeded; + } + + public ContentProviderHolder newHolder(ContentProviderConnection conn) { + ContentProviderHolder holder = new ContentProviderHolder(info); + holder.provider = provider; + holder.noReleaseNeeded = noReleaseNeeded; + holder.connection = conn; + return holder; + } + + public boolean canRunHere(ProcessRecord app) { + return (info.multiprocess || info.processName.equals(app.processName)) + && uid == app.info.uid; + } + + public void addExternalProcessHandleLocked(IBinder token) { + if (token == null) { + externalProcessNoHandleCount++; + } else { + if (externalProcessTokenToHandle == null) { + externalProcessTokenToHandle = new HashMap<IBinder, ExternalProcessHandle>(); + } + ExternalProcessHandle handle = externalProcessTokenToHandle.get(token); + if (handle == null) { + handle = new ExternalProcessHandle(token); + externalProcessTokenToHandle.put(token, handle); + } + handle.mAcquisitionCount++; + } + } + + public boolean removeExternalProcessHandleLocked(IBinder token) { + if (hasExternalProcessHandles()) { + boolean hasHandle = false; + if (externalProcessTokenToHandle != null) { + ExternalProcessHandle handle = externalProcessTokenToHandle.get(token); + if (handle != null) { + hasHandle = true; + handle.mAcquisitionCount--; + if (handle.mAcquisitionCount == 0) { + removeExternalProcessHandleInternalLocked(token); + return true; + } + } + } + if (!hasHandle) { + externalProcessNoHandleCount--; + return true; + } + } + return false; + } + + private void removeExternalProcessHandleInternalLocked(IBinder token) { + ExternalProcessHandle handle = externalProcessTokenToHandle.get(token); + handle.unlinkFromOwnDeathLocked(); + externalProcessTokenToHandle.remove(token); + if (externalProcessTokenToHandle.size() == 0) { + externalProcessTokenToHandle = null; + } + } + + public boolean hasExternalProcessHandles() { + return (externalProcessTokenToHandle != null || externalProcessNoHandleCount > 0); + } + + void dump(PrintWriter pw, String prefix, boolean full) { + if (full) { + pw.print(prefix); pw.print("package="); + pw.print(info.applicationInfo.packageName); + pw.print(" process="); pw.println(info.processName); + } + pw.print(prefix); pw.print("proc="); pw.println(proc); + if (launchingApp != null) { + pw.print(prefix); pw.print("launchingApp="); pw.println(launchingApp); + } + if (full) { + pw.print(prefix); pw.print("uid="); pw.print(uid); + pw.print(" provider="); pw.println(provider); + } + if (singleton) { + pw.print(prefix); pw.print("singleton="); pw.println(singleton); + } + pw.print(prefix); pw.print("authority="); pw.println(info.authority); + if (full) { + if (info.isSyncable || info.multiprocess || info.initOrder != 0) { + pw.print(prefix); pw.print("isSyncable="); pw.print(info.isSyncable); + pw.print(" multiprocess="); pw.print(info.multiprocess); + pw.print(" initOrder="); pw.println(info.initOrder); + } + } + if (full) { + if (hasExternalProcessHandles()) { + pw.print(prefix); pw.print("externals="); + pw.println(externalProcessTokenToHandle.size()); + } + } else { + if (connections.size() > 0 || externalProcessNoHandleCount > 0) { + pw.print(prefix); pw.print(connections.size()); + pw.print(" connections, "); pw.print(externalProcessNoHandleCount); + pw.println(" external handles"); + } + } + if (connections.size() > 0) { + if (full) { + pw.print(prefix); pw.println("Connections:"); + } + for (int i=0; i<connections.size(); i++) { + ContentProviderConnection conn = connections.get(i); + pw.print(prefix); pw.print(" -> "); pw.println(conn.toClientString()); + if (conn.provider != this) { + pw.print(prefix); pw.print(" *** WRONG PROVIDER: "); + pw.println(conn.provider); + } + } + } + } + + @Override + public String toString() { + if (stringName != null) { + return stringName; + } + StringBuilder sb = new StringBuilder(128); + sb.append("ContentProviderRecord{"); + sb.append(Integer.toHexString(System.identityHashCode(this))); + sb.append(" u"); + sb.append(UserHandle.getUserId(uid)); + sb.append(' '); + sb.append(name.flattenToShortString()); + sb.append('}'); + return stringName = sb.toString(); + } + + public String toShortString() { + if (shortStringName != null) { + return shortStringName; + } + StringBuilder sb = new StringBuilder(128); + sb.append(Integer.toHexString(System.identityHashCode(this))); + sb.append('/'); + sb.append(name.flattenToShortString()); + return shortStringName = sb.toString(); + } + + // This class represents a handle from an external process to a provider. + private class ExternalProcessHandle implements DeathRecipient { + private static final String LOG_TAG = "ExternalProcessHanldle"; + + private final IBinder mToken; + private int mAcquisitionCount; + + public ExternalProcessHandle(IBinder token) { + mToken = token; + try { + token.linkToDeath(this, 0); + } catch (RemoteException re) { + Slog.e(LOG_TAG, "Couldn't register for death for token: " + mToken, re); + } + } + + public void unlinkFromOwnDeathLocked() { + mToken.unlinkToDeath(this, 0); + } + + @Override + public void binderDied() { + synchronized (service) { + if (hasExternalProcessHandles() && + externalProcessTokenToHandle.get(mToken) != null) { + removeExternalProcessHandleInternalLocked(mToken); + } + } + } + } +} |