blueprint binder

Service Manager is one of the core components of binder interprocess communication:It plays the role of binder between the interprocess communication context ManagerResponsible for managing service components in the systemProviding services to the client component to obtain proxy objectsFirst, Service manager start-up1, ServiceManager is initiated by Init, startup script in System/core/rootdir/init.rc.Servi

This article refers to "Android system source code scenario analysis", author Luo ShenyangFirst, the test code:~/android/external/binder/server----FregServer.cpp~/android/external/binder/common----IFregService.cpp----IFregService.h~/android/external/binder/client----FregClient.cppBinder Library (Libbinder) code:~/android/frameworks/base/libs/

Basic knowledge of the Linux kernel: process isolation/virtual address space : In the operating system, in order to protect a process from interfering with each other, a technology called "process isolation" is designed to prevent process A from manipulating process B's data. While the process isolation technology uses the virtual address space, the virtual address space of process A is different from the virtual address space of process B, and if notification between process and proces

In Asp.net MVC, Model Binder is a very important part in the lifecycle. The process of Model Binder can help you understand what happened behind Model Binder. In addition, this series of articles lists the extension points of Model Binder in MVC and how to use these extensions. Reading Directory: 1. workflow 2 of Model

The use of root in Android to implement the System_server in the binder of the IOCTL call interceptionCategory: Android2013-06-19 18:09 779 people read comments (0) favorite reports Author: PassionTime: 2012-10-18,13:53:53Links: http://bbs.pediy.com/showthread.php?t=157419The use of root in Android to implement the System_server in the binder of the IOCTL call interceptionPassion2012-10-18Keywords: Andr

Binder proxy technical solution Author's low-end coders Time: 0x0 Several friends tried to hook the ioctl of system_process to intercept the IPC communication of the system. The disadvantage of this method is that it is too low-layer. After successful interception, it is more difficult to parse the communication data. in addition, there are also a bunch of compatibility issues, because different Android firmware versions have some modifications to som

Android binder Mechanism 2 (client and common server), androidbinder Before talking about the communication between them, let's take MediaServer as an example to see what common Server processes are doing. Int main (){...... // Obtain the ProcessState instance sp Defaservicservicemanager () has been introduced in the previous article.MediaPlayerService: instantiate () is implemented as follows, that is, addService to ServiceManager, which is simila

Learning notes for ASP. net mvc 4 practice 11: Model binder and value providers, 1. Create a custom model Binder: The process of creating a Model object using request data and passing the object to an action parameter is called Model Binding ). Most of the time, the action parameter is the primary key of the object or other unique identifiers, so we do not have to place a piece of repeated data access code

I. Main communication methods between processes in Linux 1. Socket; 2. Name pipe name pipeline; 3. Message Queue; 4. Singal semaphore; 5. share memory shared memory; 6. semophore semaphore Ii. Main communication methods of the Java System 1. Socket; 2. Name pipe; Iii. Main communication modes of Android system Binder Communication Pipe Socket Share memory 4. What are the advantages of binder communicatio

In the above "Binder Mechanism 2 of Android system -- Service proxy object (1)", we learned the Service proxy object bpbinder at the C/C ++ layer of the process, and the underlying Processing Method of binder. In this article, we will analyze in depth the creation and use of Service proxy objects at the Java layer of the process.C/C ++ and Java layers of the android process In Android, most programs are dev

Binder Proxy technical solution, binderproxyBinder Proxy technical solution Author's low-end coders Time: 0x0 Several friends tried to hook the ioctl of system_process to intercept the IPC communication of the system. The disadvantage of this solution is that it is too low-layer. After successful interception, it is quite troublesome to parse the communication data. in addition, there are also a bunch of compatibility issues. Due to different Android

If you only use services locally in an application and do not need to work across processes, You can implement your own binder class, use it to directly provide your client with the ability to access public methods in the service. Note:Generally, the client and server only work in the same application and process. For example, for an application that needs to play music well, you need to bind the music playing service working in the background to an a

Binder mechanism is An important means of cross-process communication in Android system. the interaction betweenService and Activity is used in this mechanism. To this end, I have written a small service case, in order to facilitate a better understanding of binder communication mechanism. Service Code: Public classMyServiceextendsService { Public Booleanflag=true; intcount; //Instantiate a binderServicebi

________________________________________ Http://www.angryredplanet.com /~ Hackbod/openbinder/docs/html/binderprocessmodel.html The binder uses a customized kernel module for inter-process communication. This is used to replace the standard Linux IPC facility, so that we can effectively model the IPC operation as "thread migration ". That is to say, in the IPC between processes, if the thread-triggered IPC has jumped onto the target process, execute th

Abstract: The working mechanism of Binder is analyzed . This paper first briefly describes the comparison between the binder mechanism in Android and the traditional Linux process , and then the process analysis based on the binder interprocess communication. Combine development examples (AIDL)to learn about Binder

First, let's take a look at the sequence chart for running the android binder system: (This figure is from Google Search) From the time sequence diagram, the entire android binder system is still somewhat complicated, but careful analysis may find that the operating mechanism of the entire android binder seems to be similar to a common system architectu

Android Binder Basics PointA comparison of traditional IPC and binder mechanismsTraditional IPC:1) receiver pays can not obtain the other party process reliable uid/pid, so that the identity of the other person can not be identified.2) The access point is open and the private channel cannot be established.3) socket, pipeline and message queue require two copies of data, transmission efficiency is poor.4) Th

1. What is binder? Intuitively, Binder is a class in Android that inherits the IBinder interface From the perspective of IPC (inter-process communication, interprocess communication), Binder is a cross-process communication in Android, and Binder can be understood as a virtual physical device whose device driv

In this article, we will thoroughly analyze how to register a service with the system. In the example in the first article, exampleservice registers a service with the system using the following statement. // File: exampleservice. cpp In the previous article, we know that the reference of the servicemanager proxy object of the current process can be obtained by calling the defaultservicemanager () global function. Before in-depth analysis of the addservice () method, let's take a look at how s

Binder: a paper clip or paper clip. We often use pins to separate two sheets of paper. In the Android system, binder is the basic framework used to complete inter-process communication IPC, that is to say, different processes are separated so that each process can transmit messages to each other. If you have developed a Java server, you can also think of it as an RPC call, that is, directly calling function