Debugging is the process of examining the state of a program - generally with a debugging tool - while it is running and attempting to find bugs that cause it to behave abnormally.

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What are the pros and cons of Inter process communication done via sockets vs shared memory?

I understand that two of the many more options for inter process communication can be : Shared memory Sockets Actually I saw these two options being exposed by Intellij Idea for debugging a Java ...
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A good IDE for NodeJS - debugging especially important [closed]

Have a significant amount of a Data Warehousing application written in Javascript. The application is set up so that the Javascript code runs in a web browser (Chrome). Of course, running a Data ...
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Why is reverse debugging rarely used?

gdb implemented support for reverse debugging in 2009 (with gdb 7.0). I never heard about it until 2012. Now I find it extremely useful for certain types of debugging problems. I wished that I heard ...
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Testing UI for azure web app on iPad

I am working on debugging my mobile application. There is a specific requirement/issue that I am having related to a drag and drop touch interface on an iPad. I am at the trial and error phase of ...
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5answers
477 views

How to understand and debug legacy software? [duplicate]

Possible Duplicate: I’ve inherited 200K lines of spaghetti code — what now? Not long ago my company placed me in a team that deals with some of the most complex bugs that are in production. ...
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322 views

Programming language features that help to catch bugs early [closed]

Do you know any programming language features that help to detect bugs early in the software development process - ideally at compile-time or else as early as possible at run-time? Examples of ...
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What is the correct way to handle debug output in Java?

As my current Java projects grow bigger and bigger, I feel a likewise growing need to insert debug output in several points of my code. To enable or disable this feature appropriately, depending on ...
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Print all values in a value object [closed]

I have to debug an issue which requires me to print all the values of a Value Object that is returned by a web service call. The Value object is a complex object in the sense, it has another object as ...
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272 views

Debugging framework for domain specific language

I want to know if there are any tools/tool-kits which aid in building source level debuggers for domain specific languages ? (I work on a proprietary DSL, which doesn't have any tools and sometimes ...
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7answers
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Programming Interview : How to debug a program?

I was recently asked the following question in an interview : How do you debug a C++ program ? I started by explaining that programs may have syntax and semantic errors. Compiler reports the ...
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6answers
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What are the advantages of using the Java debugger over println?

I always use System.out.println(...) to debug my code, and it works pretty well. In which cases do you use the eclipse java debugger? I never had to use it and the little bug symbol is still ab bit ...
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What is the term for a 'decoy' feature or intentional bug? [closed]

I have forgotten a slang programming term. This thing is an intentional bug or a decoy feature used as a distraction. An example usage, "Hey Bob, QA is doing a review today. Put a $THING into the ...
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166 views

Good example of gprof, for iOS project

The GNU profiler gprof, can be used to profile any application right on the device, allowing real world profiling. As Xcode 4.5 based on LLVM plus it has GNU Debugger, Profiler, and others. I need ...
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4answers
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What is a zombie process or thread?

What is a zombie process or thread, and what creates them? Do I just kill them, or can I do something to get diagnostics about how they died?
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8answers
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Does software testing methodology rely on flawed data?

It’s a well-known fact in software engineering that the cost of fixing a bug increases exponentially the later in development that bug is discovered. This is supported by data published in Code ...
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2answers
959 views

Differences between imperative-language and functional-language debuggers

Up to now I have always worked with imperative languages like Pascal, C, C++, Java in a production environment, so I have experience with debuggers for these languages (Turbo Pascal, Turbo C, GDB / ...
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1answer
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How do I debug a cluster running Microsoft server 2003?

I'm sole developer of a complex critical software system, written in Visual C++ 2005. It's deployed on a classical Microsoft cluster scenario (active/passive), that has Windows Server 2003 R2. If a ...
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6answers
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Debugging: understanding details on why certain fixes worked?

When debugging, I sometimes find that I make some changes and I am not 100% sure why those changes correct some bug in the program. Is it essential to understand every single detail about why some ...
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2answers
165 views

How to quickly adapt to a project?

Suppose my favourite open source application has a bug. Now I want to contribute to the application by fixing its bug and submit the patch to the development team. What's the most effective way to do ...
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3answers
559 views

Are there any theories or books about how to debug “in general”? [closed]

I read and studied a lot of computer science and engineering and I rarely or never seen a book about debugging or a theory how to debug (though I surely developed some debugging theories of my own). ...
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8answers
540 views

How often should I be compiling?

For the longest time I've just done small app development. Building and debugging took a matter of seconds (or should I say - second?). I got fairly used to just debugging to test literally ...
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2answers
159 views

Debugger for file I/O development? [closed]

Okay, the question title may be a bit cryptic. But it aptly describes what I'm looking for: I think every experienced coder went through this numerous times: You get a binary file format ...
5
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8answers
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Bug fixing appproach

I have been working on a project comprising of databases, and I recently received a bug report for the remote execution of some queries. Usually, you try to find out the actual cause for the bug to ...
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5answers
318 views

How to become a super user (programming)? [closed]

You try a new tool and it does not work. You google the problem and if you are lucky a random answer says you need to edit some weird configuration file and place it in a specific directory you don't ...
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Any success stories about using slicing tools to help debugging

Program slicing is one of those software technologies where there is much more activity in the research community than in the industry community. Does anybody outside of the research community using ...
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3answers
275 views

Why do you have to manually type variable names while debugging?

I've seen this in a lot of IDEs (even in the most popular and heavily used ones, like Visual Studio): if you want to watch a variable's value, you have to manually type its name in the Watches section ...
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7answers
672 views

Bug once in a while, but high priority

I am working on a CNC (computer numerical control) project which cuts shapes into metal with help of laser. Now my problem is once in a while (1-2 times in 20 odd days) the cutting goes wrong or not ...
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2answers
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I have a stacktrace and limit of 250 characters for a bug report

I'm developing an xbox indie game and as a last-resort I have a try...catch encompassing everything. At this point if an exception is raised I can get the user to send me a message through the xbox ...
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Becoming a Better Bug-Fixer

I love being a programmer. There, I said it. However, with that said, I've realized lately that I really can't stand bug-fixing. At all. In fact, while I'm developing something, my productivity is ...
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2answers
141 views

Syntax tree dump format

When writing a compiler, it is useful to include the ability to dump the abstract syntax tree in a human readable format, for debugging purposes. This output might also be useful for other tools like ...
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16answers
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How to check or assess debugging skills of a person?

What kind of skills determine a person that is capable of debugging code with ease? Some time ago my friend carried out an interview with a relatively good programmer. The programmer got hired. He ...
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4answers
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What are good strategies in C for dealing with pointer errors of this type?

In C, I often come across errors with code like this prio_queue->head[index] = newEntry; Yields a " "Cannot assign Entry** to Entry* " How do you prevent/debug errors of this type, in general? ...
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4answers
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How can I debug a memory leak in a service [closed]

I have a windows service program that is running on one of our servers. It has a memory leak of some kind within the program. When it first starts running it is using 20,000k memory. Within a few ...
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12answers
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Is it possible to speed-read code well?

Sometimes we have huge code listings to deal with, and I'm curious as to how the advanced, highly skilled programmers read code. And I'll say with an emphasis on debugging and finding issues.
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Does the use of debuggers have an effect on the efficiency of programmers? [duplicate]

Possible Duplicate: Are debugging skills important to become a good programmer? I'm a young Java developer and I make a systematic use of the Netbeans debugger. In fact, I often develop my ...
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How to debug/change Java code while the program is running?

I just saw a video showing how Notch (of Minecraft fame) is debugging and changing Minecraft while it is running. He pauses the game, changes something in the code and then unpauses the game where the ...
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7answers
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What should I learn more about debugging?

To debug my programs I mainly use the following methods: Use printf (or equivalent in other languages) to check the value of a variable after a particular statement or to check whether the program ...
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11answers
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Is it significantly costlier to fix a bug at the end of the project?

In a blog post by Andrew Hay, the following axiom was posited: It costs significantly more to fix a bug at the end of the project that it does to fix the same bug earlier in the project. ...
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What's the benefit of avoiding the use of a debugger?

Over the course of my career, I've noticed that some developers don't use debugging tools, but do spot checking on erroneous code to figure out what the problem is. While many times being able to ...
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2answers
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Never written much unit tests, how can I practice more of it?

I have an interview coming up soon next week and there's a few things on their list of responsibilties for this software development job (the job position title is vague, it says java developer) that ...
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375 views

Is it possible to prune the stacktrace returned for a custom exception in PHP

I am working on a project in PHP that does a lot of input validation and can throw different custom exception classes in various layers of the application. To make the project code easier to read, ...
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Debug multiprocessing in Python

What are some good practices in debugging multiprocessing programs in Python?
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How do you find errors related to undeclared variables in php?

If I copy a piece of code from somewhere that looks like so $blah = array(1,2,3,4); foreach ($blah as $i) echo ($i); and rename the variables but forget to do it correctly like so $apple = ...
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5answers
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What is a practical way to debug Rails?

I get the impression that in practice, debuggers are rarely used for Rails applications. (Likewise for other Ruby apps, as well as Python.) We can compare this to the usual practice for Java or ...
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6answers
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What's a good approach to adding debug code to your application when you want more info about what's going wrong?

When our application doesn't work the way we expect it to (e.g. throws exceptions etc.), I usually insert a lot of debug code at certain points in the application in order to get a better overview of ...
4
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1answer
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Is it okay to call exception-triggered debugging “post-mortem debugging”?

I heard the term "post-mortem debugging", and Wikipedia says it's debugging done after the program has crashed. I often debug Python apps using a debugger that stops execution once an ...
14
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6answers
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Why not use the word bug instead of exception?

If we refer to exceptions as bugs, why not just call it a bug in the first place instead of an exception? If in the code it's called exception and as soon as it occurs it's called a bug. Then why not ...
15
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16answers
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How to spend less time on debugging? [closed]

Following the Pareto rule, a programmer spends only 20% of his time for really useful things. I spend 80% of my time debugging, fixing small things to get everything working. Is there a way to spend ...
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4answers
240 views

Pesky bugs - nonexistant?

Very short introduction (this is quite a context-heavy question): I'm a 17 year old script kiddo/programmer, doing some projects, usually netting around 20 files of 200 lines each. I usually don't ...
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13answers
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Can we guarantee a program will never go wrong?

We have a system here. Recently there is a wrong calculation in one of the number in the report generated by the system. Through out our experience, we've never encounter any problem/error in this ...