Pseudo-code to illustrate the breakpoint in a program, Programming Languages

Assignment Help:

The standard way for debuggers to plant interactive breakpoints in a program in RAM (whatever the processor instruction set) is to save the break pointed instruction and replace it by a jump to the breakpoint handling code. After the breakpoint is triggered, the saved instruction is restored in its original place in the code. If the interactive dialogue with the debugger during the breakpoint handling indicates that that the triggered breakpoint is to be removed, execution of the program can be resumed simply by jumping to the instruction that had been break pointed. However, if the dialogue with the debugger indicates that the breakpoint is to remain in place when execution of the program is resumed, implementation is more complicated. Execution of the saved instruction could be emulated, but this is difficult to do, ensuring all side effects such as condition code setting and exception triggering are performed correctly, as well as correctly simulating all addressing modes, such as PC relative. It is much easier simply to execute the break pointed instruction in place, but to plant another breakpoint on a subsequent instruction in the same basic block, usually the immediate successor to the original breakpoint, so that the breakpoint handler can regain control in order to replant the original breakpoint and remove the secondary one. This obviously has some challenges if the successor of the break pointed instruction cannot be statically predicted, for instance if the break pointed instruction is a conditional jump, but a common solution is simply to ban planting breakpoints on such instructions. Identify the critical races that exist with this scheme if the program is executed by multiple threads, possibly multiple cores or multiple processors. Use pseudo-code to illustrate how you would resolve these issues.


Related Discussions:- Pseudo-code to illustrate the breakpoint in a program

Discuss on unix kernel components, Question 1 Discuss on UNIX kernel co...

Question 1 Discuss on UNIX kernel components 2 Explain process creation and process termination 3 When do a Deadlock occur? What are the Necessary Conditions for Deadlock

C++, Have the user input two values. Store them in variables called saving...

Have the user input two values. Store them in variables called savings and expenses, both of data type double. If expenses is less than savings, subtract expenses from savings, o

C# xna game project, I need to finish my game project within two weeks usin...

I need to finish my game project within two weeks using XNA. Would you guys can help me to finish it? Thank you

Program for implement xslt, The aim of this task is to gain experience in u...

The aim of this task is to gain experience in using the popular Web languages XSLT, XQuery, DTD, XML Schema and RDF. The Content: The University is organizing a stage show wh

Assembly Language, need a program of any multiplication algorithm implement...

need a program of any multiplication algorithm implemented in assembly language x86 without using mul command

Database, asample database report

asample database report

Improved support for javascript debugging, Improved Support for JavaScript ...

Improved Support for JavaScript Debugging ASP.NET has many benefits over vintage ASP in the place of debugging. You can now quickly debug your server-side value using the complete

Write a program that will input two number from the keyboard, Write a progr...

Write a program that will input two numbers from the keyboard and execute each of the signed and unsigned multiply and divide instructions.  For each instruction, the program shoul

Mvc architecture, MVC Architecture Model/view/controller (MVC) is a program...

MVC Architecture Model/view/controller (MVC) is a program structure, currently regarded an executive design used in program technological innovation. The design isolates "domain lo

Program to translate a sentence , a) Write a program i_language(Sentence,N...

a) Write a program i_language(Sentence,NewSentence) that translates a sentence to the i-language. In this language all vowels are changed to i and all other characters are kep

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd