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

Use an insertion sort to sort an array, Use an insertion sort to sort an ar...

Use an insertion sort to sort an array (sequence) of long word integers. The size of the list will appear just before the list itself. Use the same labels as in this example: LE

Php parse out custom lines from a file, i want another php script like that...

i want another php script like that one in assignment: EM201484 SA727PHP i want to parse out an urls form log file i will post attachments for a demo

Java applet assignment help, Objectives: Create an applet, Use metho...

Objectives: Create an applet, Use methods from the Graphics class , Use the Color class General Instructions: The java class that need to be imported into this assignm

Help with c assignment, You will design and implement a program that will •...

You will design and implement a program that will • analyse the various characteristics of a maze, represented by a particular coding of its basic con- stituents into numbers store

Program to reads a sequence of integer numbers , Task: This assignment...

Task: This assignment is about writing programmes and Web Services in C#: 1) Develop a console programme that reads a sequence of integer numbers from the console and sorts

Shell script display time for user which is idle, Normal 0 fals...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Program to calculate the triangle area, Write a program that will allow the...

Write a program that will allow the user to input the corners of a triangle. The program will draw small yellow circles for each input point, then draw the triangle and calculate t

Adding new features to a simple shell implementation, You will be working o...

You will be working on creating both a realistic project environment and on adding new features to a simple shell implementation provided in shell.tar.z. After you un-tar it, let's

Explain what the return value of fork-shell programming, Simple Shell ...

Simple Shell In this LAB, you will explore and extend a simple Unix shell interpreter. In doing so, you will learn the basics of system calls for creating and managing process

Use case diagram incremental development, Introduction This assignment ...

Introduction This assignment builds on your application, produced in Assignment 1, which holds a list of cabins, which can be either read in from a text file or just hard coded

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