jprobe

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

above said that should be done by your own work, this is jprobe. In general terms. The point of Jprobe is that it is actually a kprobe prefunc. Its prefunc is so realized:Prefunc (Kprobe, regs) { Saves the contents of the Regs Register field save stack //Because Jprobe uses the same stack as the hook function, it may change the contents of the Stack Re

1. Install the jprobe on the native PC:jprobeforwindowsexeformat_8102. Upload the Jprobe file to the Linux server:3. Granting of authority:chmod a+x Jprobe810_install.bin4. Start the installation:./jprobe801_install.bin-i ConsoleAt this point, the Jprobe installation is complete5. Crack:Copy the cracked file Client-support.jar to/opt/jprobe_8.1/lib.Give permissio

The Kprobes or Jprobes tool is used when you want to get information about a kernel module in real time, or if you want to change the data within the kernel module.Jprobes is simpler, and it's easy to inject your own code before a function call to get or change the parameters of a function.Examples of Use methods:1. View the function you want to inject by cat/proc/kallsyms, and if not, explain that the function is not exported and is not available for this method.2. Continue tomorrowhttps://www.

JprobesUseSimilar to Kprobes and return probes, the difference is that Kprobes can insert a probe at any instruction, jprobes insert the probe only at the function entrance, and return probes insert the probe when the function returns."Interface description""Reference samples/kprobes/jprobe_example.c"#include int register_jprobe (struct jprobe *jp);void Unregister_jprobe (struct jprobe *jp);int enable_jprob

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 predefined operations at the probe point. Based

I once did a small swing in the beginning of the process, using the Java Se,swing,thread and other Dongdong, the original experience has not done a rigorous performance testing, cloth to the production environment after a period of time to find that the small program will sometimes throw The java.lang.OutofMemoryError exception is the Java memory overflow. There was a lot of information on the Internet, tried some methods, the code has a little bit of optimization, but there is a problem I still

Java program performance optimization: finding out the culprit of memory overflow and java Performance Optimization I once worked on a small swing program when I first got into the line. I used java SE, swing, Thread, and other stuff. I didn't perform strict performance tests with little experience at the beginning, after a while in the production environment, I found that the applet sometimes throws java. lang. outOfMemoryError is abnormal, that is, java memory overflow. At that time, I also ch

application, it took a tester several hours to study the program before it finally came to the fore. The basic code and package of this Java application are developed by several different development teams at different times. I guess the unexpected memory vulnerabilities in this application are caused by programmers who do not really understand the code developed by others. The Java code we are discussing allows users to create applications for the Palm personal digital assistant without having

different times. I guess the unexpected memory vulnerabilities in this application are caused by programmers who do not really understand the code developed by others. The Java code we are discussing allows users to create applications for the palm personal digital assistant without having to write any local Palm OS code. By using the graphical user interface, you can create a form, add controls to the form, and connect the events of these controls to create a palm application. The tester found

tools than task monitoring programs to find and ultimately eliminate memory leaks. The memory debugging program can be used when you want to detect memory leaks (see references below. These programs usually give you information about the number of objects in the heap memory, the number of each object instance, and the memory used by the object. In addition, they provide useful views that show references and references for each object so that you can track the source of memory vulnerabilities.Ne

monitoring programs to find and ultimately eliminate memory leaks. The memory debugging program can be used when you want to detect memory leaks (see references below. These programs usually give you information about the number of objects in the heap memory, the number of each object instance, and the memory used by the object. In addition, they provide useful views that show references and references for each object so that you can track the source of memory vulnerabilities.Next, I will show

Red Hat Linux Fault location technology detailed and examples (4)On-line fault location is in the event of a fault, the operating system environment is still accessible, fault handlers can be logged into the operating system through console, SSH, etc., in the shell to perform a variety of operation commands or test procedures in the manner of the failure environment to observe, analyze, test, To locate the cause of the failure.AD:2014WOT Global Software Technology Summit Beijing Station course v

)/build ALL: $ (Make)-C $ (kdir) subdirs = $ (PWD) Modules Clean: Rm-RF *. O *. Ko *. Mod. *. C *. T * After compilation: # Insmod./kprobes_example.ko Then run the dmesg command to view the handler output, for example: [2, 1251.789211] planted kprobe at c1058e30 [1256.716389] pre_handler: p-> ADDR = 0xc1058e30, IP = c1058e31, flags = 0x246 [1256.716394] post_handler: p-> ADDR = 0xc1058e30, flags = 0x246 [1262.680009] pre_handler: p-> ADDR = 0xc1058e30, IP = c1058e31, flags = 0x246 [1262.680024]

the Jar task with special treatment for files that should end up in the Web-inf/lib, web-inf/classes, or W Eb-inf directories of the WEB application Archive. Zip Generate a ZIP file. Audit/coverage Tasks [Back to top] Task Name Description JDepend Invokes the JDepend parser. This parser "traverses a set of Java source-file directories and generates design-quality metrics for each Java package".

As the web becomes more and more demanding on the performance of the system, the key to any system is how to ensure the performance of the system and can predict and locate the problem before performance problems occur. The system test before the system is on line and the performance monitoring of the whole system is the method to ensure the system to run with excellent performance. At the end of last year, I wrote an article about how to use Jprobe t

original system call. But you can achieve something similar to the modified effect, for the moment it counts as a "pseudo-modification". 2. I used the jprobe detection method in kprobes in the test , in fact, other kernel debugging techniques such as Systemtap and so should be able to achieve this function, but I do not realize it all. Kprobes is a lightweight kernel debugging tool that uses the Kprobes technology to perform a user-defined operatio

, . NET and Java applications as as, VBScript, and JScript code. http://www.automatedqa.com/products/aqtime/ Web site Performance Diagnostics gadget-yslow Http://blog.csdn.net/Testing_is_believing/archive/2008/05/17/2455109.aspx https://addons.mozilla.org/en-US/firefox/addon/5369/ JVM Monitoring: Jconsole (included with JDK) Jconsole Remote monitoring: Http://hi.baidu.com/higkoo/blog/item/29872f4af62f8c2408f7ef5d.html Java Performance Monitoring: Http://hi.baidu.com/higkoo/blog/item/f258326

found in another project. It is easy to install. There is an option to install a plug-in to my ide. After installation, run the application. With this plug-in, it will automatically connect to yourkit. It has a beautiful user interface that allows you to view the memory and CPU monitoring, as well as the request execution path. 4. Jprobe I encountered some difficulties when I first created Jprobe. The inst

promoting the unprecedented development of J2EE, there are often some troubles, that is, people are often disappointed with the performance of J2EE applications. Therefore, we need some tools and investigation strategies to help the J2EE development team solve these performance problems. This is the problem to be solved by Quest JProbe Profiler and Jprobe Memory Debugger. | YourKitYourKit Java Profiler is