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

C programming, Write an interactive C program which prompts the user with t...

Write an interactive C program which prompts the user with the following options on the opening menu: 1) Student information 2) Theory counselling batch-scheduling

Visual Basic 6.0, i want to record in database but how to delete only dupli...

i want to record in database but how to delete only duplicate field not row in vb 6.0 or ms-access

Pattern matching program in xhtml, Part 1 Given the following Regular Exp...

Part 1 Given the following Regular Expressions, explain in detail the pattern accepted by each. Pay attention to all the characters being used. Your answers need not appear with

JUnit test, hi, can you help me with testing java classes I have wrote usin...

hi, can you help me with testing java classes I have wrote using java and jsp and servlet in eclipse ? I want to use JUnit for testing

Program on car purchasing simulation, Introduction A new online syst...

Introduction A new online system for purchasing carsis being designed and you have been contracted to write a C# console application program that models the proposed functio

Motion field matlab with quiver, how to get the HORIZONTAL motion field fro...

how to get the HORIZONTAL motion field from motion vectors matrices

Shell script to count of five character words, Normal 0 false ...

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

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

Simple encryption, i have to make a program that encrypt a text to numbers,...

i have to make a program that encrypt a text to numbers, i don''t know what is wrong in my code, the example of what i need: text: hi >> number: 17 23

Formulas, how do I change a existing formula with a new formula and it show...

how do I change a existing formula with a new formula and it show the result

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