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/*
* 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.server.am;
import android.content.ComponentName;
/**
* This class describes various information required to start a process.
*
* The {@code mHostingType} field describes the reason why we started a process, and
* is only used for logging and stats.
*
* The {@code mHostingName} field describes the Component for which we are starting the
* process, and is only used for logging and stats.
*
* The {@code mHostingZygote} field describes from which Zygote the new process should be spawned.
*
* {@code mDefiningPackageName} contains the packageName of the package that defines the
* component we want to start; this can be different from the packageName and uid in the
* ApplicationInfo that we're creating the process with, in case the service is a
* {@link android.content.Context#BIND_EXTERNAL_SERVICE} service. In that case, the packageName
* and uid in the ApplicationInfo will be set to those of the caller, not of the defining package.
*
* {@code mDefiningUid} contains the uid of the application that defines the component we want to
* start; this can be different from the packageName and uid in the ApplicationInfo that we're
* creating the process with, in case the service is a
* {@link android.content.Context#BIND_EXTERNAL_SERVICE} service. In that case, the packageName
* and uid in the ApplicationInfo will be set to those of the caller, not of the defining package.
*
*/
public final class HostingRecord {
private static final int REGULAR_ZYGOTE = 0;
private static final int WEBVIEW_ZYGOTE = 1;
private static final int APP_ZYGOTE = 2;
private final String mHostingType;
private final String mHostingName;
private final int mHostingZygote;
private final String mDefiningPackageName;
private final int mDefiningUid;
public HostingRecord(String hostingType) {
this(hostingType, null, REGULAR_ZYGOTE, null, -1);
}
public HostingRecord(String hostingType, ComponentName hostingName) {
this(hostingType, hostingName, REGULAR_ZYGOTE);
}
public HostingRecord(String hostingType, String hostingName) {
this(hostingType, hostingName, REGULAR_ZYGOTE);
}
private HostingRecord(String hostingType, ComponentName hostingName, int hostingZygote) {
this(hostingType, hostingName.toShortString(), hostingZygote);
}
private HostingRecord(String hostingType, String hostingName, int hostingZygote) {
this(hostingType, hostingName, hostingZygote, null, -1);
}
private HostingRecord(String hostingType, String hostingName, int hostingZygote,
String definingPackageName, int definingUid) {
mHostingType = hostingType;
mHostingName = hostingName;
mHostingZygote = hostingZygote;
mDefiningPackageName = definingPackageName;
mDefiningUid = definingUid;
}
public String getType() {
return mHostingType;
}
public String getName() {
return mHostingName;
}
/**
* Returns the UID of the package defining the component we want to start. Only valid
* when {@link #usesAppZygote()} returns true.
*
* @return the UID of the hosting application
*/
public int getDefiningUid() {
return mDefiningUid;
}
/**
* Returns the packageName of the package defining the component we want to start. Only valid
* when {@link #usesAppZygote()} returns true.
*
* @return the packageName of the hosting application
*/
public String getDefiningPackageName() {
return mDefiningPackageName;
}
/**
* Creates a HostingRecord for a process that must spawn from the webview zygote
* @param hostingName name of the component to be hosted in this process
* @return The constructed HostingRecord
*/
public static HostingRecord byWebviewZygote(ComponentName hostingName) {
return new HostingRecord("", hostingName.toShortString(), WEBVIEW_ZYGOTE);
}
/**
* Creates a HostingRecord for a process that must spawn from the application zygote
* @param hostingName name of the component to be hosted in this process
* @param definingPackageName name of the package defining the service
* @param definingUid uid of the package defining the service
* @return The constructed HostingRecord
*/
public static HostingRecord byAppZygote(ComponentName hostingName, String definingPackageName,
int definingUid) {
return new HostingRecord("", hostingName.toShortString(), APP_ZYGOTE,
definingPackageName, definingUid);
}
/**
* @return whether the process should spawn from the application zygote
*/
public boolean usesAppZygote() {
return mHostingZygote == APP_ZYGOTE;
}
/**
* @return whether the process should spawn from the webview zygote
*/
public boolean usesWebviewZygote() {
return mHostingZygote == WEBVIEW_ZYGOTE;
}
}
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