| /* |
| * 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.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.util.Slog; |
| |
| import java.io.PrintWriter; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| |
| class ContentProviderRecord extends ContentProviderHolder { |
| // All attached clients |
| 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; |
| final ActivityManagerService service; |
| final int uid; |
| final ApplicationInfo appInfo; |
| final ComponentName name; |
| ProcessRecord proc; // if non-null, hosting process. |
| ProcessRecord launchingApp; // if non-null, waiting for this app to be launched. |
| String stringName; |
| |
| public ContentProviderRecord(ActivityManagerService _service, ProviderInfo _info, |
| ApplicationInfo ai, ComponentName _name) { |
| super(_info); |
| service = _service; |
| uid = ai.uid; |
| appInfo = ai; |
| name = _name; |
| noReleaseNeeded = uid == 0 || uid == Process.SYSTEM_UID; |
| } |
| |
| public ContentProviderRecord(ContentProviderRecord cpr) { |
| super(cpr.info); |
| uid = cpr.uid; |
| appInfo = cpr.appInfo; |
| name = cpr.name; |
| noReleaseNeeded = cpr.noReleaseNeeded; |
| service = cpr.service; |
| } |
| |
| public boolean canRunHere(ProcessRecord app) { |
| return (info.multiprocess || info.processName.equals(app.processName)) |
| && (uid == Process.SYSTEM_UID || 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) { |
| 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); |
| } |
| pw.print(prefix); pw.print("uid="); pw.print(uid); |
| pw.print(" provider="); pw.println(provider); |
| pw.print(prefix); pw.print("name="); pw.println(info.authority); |
| 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 (hasExternalProcessHandles()) { |
| pw.print(prefix); pw.print("externals="); |
| pw.println(externalProcessTokenToHandle.size()); |
| } |
| if (clients.size() > 0) { |
| pw.print(prefix); pw.println("Clients:"); |
| for (ProcessRecord cproc : clients) { |
| pw.print(prefix); pw.print(" - "); pw.println(cproc.toShortString()); |
| } |
| } |
| } |
| |
| @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(' '); |
| sb.append(name.flattenToShortString()); |
| sb.append('}'); |
| return stringName = 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); |
| } |
| } |
| } |
| } |
| } |