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Linux kernel Debugging technology--jprobe use and implementation

The previous post introduces the principle of kprobes and the use and implementation of Kprobe, this paper introduces the second detection technology in Kprobes Jprobe, which is based on kprobe implementation, can not be inserted at any point in the function of the probe, only at the entrance of the function to detect, Typically used to monitor the parameter values of a function. This article first introduces a simple example of how jprobe is used, an

Differential probes for the basic series of oscilloscope probes

As a professional hardware design and testing engineer, we use a variety of different digital oscilloscopes for the measurement of the relevant electrical signal volume every day. There are also a wide range of probes that match these oscilloscopes, including passive probes (including high-voltage probes, transmission line probes), active probes (including active single-ended probes, active differential probes, etc.), current probes, light probes, etc. Each

[Hardware project] 2, car reversing radar design--based on special reversing radar chip GM3101 design scheme and the use of cx20106a infrared detection chip scheme comparison

strong. (Beautiful, degraded performance)The 4th generation of reversing radar: combined with the previous generations of hybrid, performance and aesthetics have improved, the price is slightly higher. (complex)5th generation reversing radar: Integrated AV system, local tyrants dedicated, rear camera. (High-end models)PS: Left for 2nd generation products, right for 5th generation productsSecond, the principle of radar rangingEven the 5th generation local tyrants package above is based on ultras

Advanced+apple+debugging (15)

You never heard of dtrace?!. This is horrible! DTrace is a tool that lets you view your code in a dynamic or static way.Http://dtrace.org/guide/preface.htmlYou can create a dtrace probes to compile into your code (in a static way), or you can check the code that has been compiled and run (in a dynamic way). DTrace is a multipurpose tool that has several functions: it can be a profiler, a parser, a debugger, or anything you want. When I had no clue where to start, I often used dtrace to specify a

Open Wifi SSID Broadcast vulnerability

to gather the same information in a more effective way (less time, less effort. The idea is to design an automated method (device) by leveraging the active scanning (probe request) of devices available for wifi and the vulnerability of automatically connecting to an open Wi-Fi access point ). Obviously, by creating a device that can sniff and automatically create a forged SSID, you can scan many devices within a period of time to obtain the scope of

Hash table details

distribution of keywords in advance and is suitable for finding small and continuous tables! Conflict Handling Method There are usually two methods to deal with conflicts: open address and chaining. The former stores all nodes in the hash list T [0 .. m-1 usually links the nodes that are synonymous with each other into a single-chain table, and puts the header pointer of this chain table in the hash list T [0 .. m-1. 1. Open address Method(1) Open address method for Conflict ResolutionWhen a co

Linux Kernel kprobes Debugging technology __linux

Kernel developers have been trying to find a fast and efficient kernel debugging tool for kernel development. The efficient debugging technology can improve the kernel development efficiency and shorten the kernel development cycle. This paper studies a new type of kernel debugging technology ―kprobes, Kprobes is a lightweight kernel debugging tool, using Kprobes technology can dynamically insert probe points in the running kernel and perform user pre

Installing DTrace on Oracle Linux

bottlenecks by defining real-time probe points at run timeScript to develop probe execution when triggered by predicate controlDetects and reports memory access errors rather than letting the system crash How to install DTrace In general, DTrace packages cannot be obtained from the public Yum and must be registered with the ULN (Unbreakable Linux Network) before they can be downloaded and installed Yum In

Performance measurement and Commissioning diagnostic Tool SYSTEMTAP under Linux

, the principle of SystemtapSystemtap uses a scripting language similar to awk and the C language (similar to DTrace's D language), which uses only three data types, integers (integers), strings (strings), and associative arrays (associative Arrays). It has a complete control structure, including blocks (blocks), conditions (conditionals), loops (loops), and functions (functions). Statement separators, which are optional, do not need to declare types, they are automatically inferred and checked

JS Development Dictionary Probes user name or password tool

Js Developing dictionaries using JavaScript to probe user names or password tools Article Author: Zhangkai (Xiao Qi)Author website:http://www.xiaoqi.netAuthor Forum:http://www.tdqy.comqq:22336848 53353866 Example DemoPackage download It is better to give a person a fish than to give it to him. This article focuses on the development of the author's ideas and procedures to achieve the goal is to let you understand a program development process and the

Linux Server FTP, telnet, ssh slow

Environment [Netcool @ inmsc4 ~] $ Uname-Linux inmsc4 2.6.18-194. EL5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux[Netcool @ inmsc4 ~] $ Dual-nic Symptom description SSH and FTP are both normal. One day, it suddenly slowed down. However, after logon, the operation is not slow and normal. According to Baidu, it is related to reverse DNS resolution. This statement is half correct becaus

Pod of kubernetes

: Pod has been arranged to a node; Read:pod can provide the request and should be added to all matching services in the load balancing pool; Initialized: all init containers Have been successfully launched; U nschedulable : Scheduler cannot dispatch pods now, for example due to lack of resources or other restrictions C ontainersReady : All containers in pod are ready Container probeA probe is a periodic diagnosis perfor

Linux under the USB drive call flow __linux

_device_match () is_usb_device (Dev)//dev represents the entire USB device usb_match_id () usb_math_dynamic_id ()//dev represents the USB device interface Really_ Probe ()//further matching USB devices two branches: device-level, interface-level. The rest of the usb_device_match was filtered out. Device Level DrV must be usb_generic_driver in the USB system only driver is the driver of the entire device, it is registered in Usb_init, and the USB driv

Unity5 GI vs. PBS rendering from usage to coloring code

Http://www.cnblogs.com/zhouxin/p/5168632.htmlThis article mainly introduces Untiy5 after the GI,PBS, as well as the light source probe, the use of reflection probe and how to play a role in the shader code, GI is how to affect the rendering, mainly divided into three parts, the first to explain the need for PBS material and the corresponding concept, the second is unity in the corresponding GI operation, Th

Research on Karma Attack and principle of WiFi pineapple

proprietary.What is Karma?Karma is a way to respond to an STA (Wireless station, cell phone, tablet, etc) probe (Probe Request) by forging a bogus response packet (Probe Response). Let the client mistakenly believe that there is a WiFi hotspot in the range that has ever been connected, thereby cheating the client connection.Through the above explanation we can c

Linux netstat--timers/o detailed and keepalive related

be timed)B-#已经产生的重发 (retransmission) timesNumber of C-#keepalive已经发送的探测 (probe) packetsNote:1, the maximum time value of keepalive is related to the value of Tcp_keepalive_time, the value of Tcp_keepalive_time, the Linux default is 7,200 seconds, that is 2 hours, the meaning is: After establishing a connection, If there is no data interaction transfer within 7,200 seconds, the server sends a probe (

Linux device driver registration process specific explanation

module, this is printed whether or not devices be fou nd in probe */1909 #ifdef MODULE1910 printk (version) 1911 #endif1912 return Pci_register_driver (netdrv_ pci_driver); 1913}Can see that the initialization function is very easy, just run a pci_register_driver function to return. In fact, the initialization of the module is so simple, this is the Linux driver ISO standard process: Module_init-->xx_init_module-->xx_register_driver. I believ

Platform_driver initialization of the I2C subsystem--i2c_adap_s3c_init ()

After completing the Platform_device addition, the I2C subsystem will perform the Platform_driver registration process. Platform_driver registration by calling the initialization function I2c_adapter_s3c_init letter Number to complete. The I2c_adap_s3c_init () function body is as follows: static int __init i2c_adap_s3c_init (void) {return platform_driver_register (s3c24xx_i2c_driver); }Platform_driver_register (s3c24xx_i2c_driver), will complete the Platform_bus bus registration Platform_driver

PostgreSQL SystemTap on Linux

]-Run script on stdin. Or:stap [Options]-E script Run given script. Or:stap [Options]-l PROBE List matching probes. Or:stap [Options]-l PROBE List matching probes and local variables. Test:[[Email protected] pg94]# VI tps.d probe begin{printf ("hello\n") exit ()}[[email protected] pg94]# STAP tps.d Checking " /lib/modules/2.6.18-274.el5/build/.config "failed with

How to use Java code to get the encoding of a file, file stream, or string

Today, through the network resources to study how to use Java code to get the file, file stream or string encoding, now share the code with you:Package Com.ghj.packageoftool;import Info.monitorenter.cpdetector.io.asciidetector;import Info.monitorenter.cpdetector.io.byteordermarkdetector;import Info.monitorenter.cpdetector.io.codepagedetectorproxy;import Info.monitorenter.cpdetector.io.JChardetFacade; Import Info.monitorenter.cpdetector.io.parsingdetector;import info.monitorenter.cpdetector.io.Un

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