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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5answers
941 views

Learning to investigate bugs [closed]

I'm not even sure how to define this difficulty. It reminds me of the test a couple of prospective employees did on me before I got a job. They would pick an object in the room and then I'd be allowed ...
14
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3answers
706 views

How to locate source code that implemented a certain feature? [closed]

I was wondering what are some techniques to locate which code implemented a specific feature, on a desktop application. I am a junior developer, with only professional programming experience lying ...
1
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11answers
568 views

Is debugging a waste of time? [duplicate]

I work on a lot of projects for fun, so I have the freedom to choose when I want to finish the project and am not constrained by deadlines. Therefore, if I wanted to, I could follow this philosophy: ...
0
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1answer
89 views

debugging web applications using debug parameter

A suggestion has been made by a team member to leave all debug code intact in our web pages... and then to create a variable that can be turned on / off to enable / disable debugging. This is a ...
1
vote
5answers
732 views

Should unit-tests be entirely self-contained? [duplicate]

As the title suggests my question is whether or not unit-tests should be entirely self-contained or can one rely on the results yielded by previous tests? What I mean, in case that it isn't entirely ...
8
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4answers
4k views

When should a database table use timestamps?

First a note, I thought maybe this question belonged in the database exchange, but I think it is more broadly related to a programming solution as a whole than to databases. Will move to database ...
4
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3answers
2k views

Is printing to console/stdout a good debugging strategy?

Let's say we have a function like this: public void myStart() { for (int i = 0; i<10; i++) myFunction(i); } private int myFunction(int a) { a = foo(a); a = bar(a); return a; } ...
2
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3answers
401 views

Debugging checklists: How much it's necessary to have? [closed]

Should making debug-checklists be an essential part of development process? How it can be integrated with unit-tests? Update Debugging checklist: Think about it as your troubleshooting checklist -- ...
10
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8answers
4k views

How should one debug a PHP web application securely without exposing secrets to competitors?

Recently I made a program. I forget to delete 2 line of codes. That mistake cost me $800 per day every day. I was programming with PHP. If a visitor uses proxy it redirect somewhere else. Using ...
1
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4answers
695 views

How to trace logical errors in algorithms [closed]

I am beginner in algorithms. Last year I participated in Google Code Jam. One of the major issues I faced during the competition was my code was working fine on my test cases, but when I submitted on ...
4
votes
2answers
339 views

How do you build debugging messages into your programs/scripts?

General, high-level question for people who work with code regularly. I was repurposing some old, outdated Javascript code into a Chrome extension, and to help me understand it, I wrote some quick ...
1
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2answers
107 views

API for expanation of complicated calculation or business rules?

In online shops there are areas with complicated rules. For example is a product visible in the product catalog is a product sold out what is the price for the product (Discounts, Promotions, ...) ...
3
votes
2answers
349 views

Verbose or concise logging [duplicate]

I was wondering how much data should be logged. I know this deeply depends on multiple factors. But it can still be hard to find the golden middle way. Lets say I have an application where people ...
1
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3answers
382 views

How do you avoid looping mistakes? Mistakes that are not detected by systems [closed]

I had this crazy initialisation -- documentList = new ArrayList<Map<String,Integer>>(); which I intended to store a new map everytime in a loop but unfortunately put itself inside the ...
2
votes
2answers
389 views

Is it realistic to use designers for complex UI [closed]

When I created my first web application few years ago, I remember trying to use the designer in VS 2008. Before I can even remember I abandoned it to the favor of actual debug to understand how my UI ...
67
votes
17answers
6k views

Is it reasonable to insist on reproducing every defect before diagnosing and fixing it?

I work for a software product company. We have large enterprise customers who implement our product and we provide support to them. For example, if there is a defect, we provide patches, etc. In other ...
-2
votes
1answer
178 views

PHP developer, how to solve javascript related issues in a program with millions of line [closed]

I am expert in PHP. There are some JavaScript related bugs in my assignment given by my supervisor. I tried to fix them using Firebug. It is time consuming. Is there any other ways? Are there any ...
2
votes
2answers
394 views

When is it okay to log filename/line information for errors?

We have a closed-source commercial C++ application. Some of our logged error messages are in plain English like "ERROR: could not read file 'foo'". While others use a macro to print filename/line ...
3
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3answers
756 views

What techniques are there for debugging remote client side errors?

What techniques are there for debugging remote client side errors in a web application, especially when they only affect a small subset of users? In my case we have an app that is working well for ...
0
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1answer
1k views

Best way to quickly explore/grok open source C/C++ projects? [duplicate]

I'm looking for a suggested workflow for quickly being able to download various c/c++ open source projects and then begin intelligently navigate sources. "Intelligently" means being able to jump ...
0
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1answer
1k views

Is there a tool that visually represents all the potential paths to a particular piece of code? [closed]

As an example of what I need and why I want it, I am trying to determine how a certain value (CurTotal) is getting set (wrongly). I've come up with these notes to myself to try to understand just what ...
1
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1answer
313 views

How do I go about debugging a PHP error?

I am coming from .NET to PHP. I am playing around with a long file written by someone else (called "cryptographp.inc.php"). It builds and returns an image to the browser. I want to show the image ...
1
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4answers
233 views

Naming: objectAction or actionObject? [closed]

The question, Stored procedure Naming conventions?, and Joel's excellent Making Wrong Code Look Wrong article come closest to addressing my question, but I'm looking for a more general set of criteria ...
4
votes
2answers
397 views

Writing Large Portions Of Code Then Debugging?

Lately I have been writing a game engine, and I have been writing a lot of "foundation stuff" (standard interfaces, modules, a message system ect.), but I have noticed a pattern, a lot of the stuff is ...
2
votes
2answers
219 views

Building Websites: Fast Debugging Without a Browser

Is there a methodology to debug websites without a browser? Normally I use a web browser to view a results page. The slow debugging process confuses me a little. To correct an error I need to switch ...
15
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1answer
1k views

Dollar Sign Blues: Javascript and PHP

I grew up programming C++ and Java where everything was safe and beautiful. Compilers made sure to keep me in check if I ever strayed. Of course, everyone did a little Perl in college, but I didn't ...
129
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16answers
22k views

Is there any way to get faster at solving bugs? I've just had a warning from my boss [closed]

I've just been told by my boss that I will receive a negative performance review on Monday. He wants to talk to me about why I am so slow and why my bug fix rate is so low. I love programming and ...
20
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5answers
2k views

How did they debug segmentation faults before protected memory?

Now, when I make a programming mistake with pointers in C, I get a nice segmentation fault, my program crashes and the debugger can even tell me where it went wrong. How did they do that in the time ...
-1
votes
1answer
337 views

Is reverse debugging possible? [duplicate]

I know there are some products for reverse debugging. I am wondering that does reverse debugging mean going to one step back or starting over again up to one step back? I've found an explanation ...
3
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1answer
197 views

Self Debuggable systems

For example, in case of GDB it is possible to debug itself by itself. I have not been able to find any JVM that can debug itself or even allows debugging on source level. I was just wondering if ...
0
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0answers
266 views

While running an application the error occurs, while debugging it doesn't [duplicate]

There is an issue which appears while running the application. It is not an Exception, but the desired UI change is not been implemented. While debugging to find the code which should be changed to ...
0
votes
2answers
2k views

How to get better at debugging? [duplicate]

How can one become better at debugging in general? I do not mean specific tools or tactics that apply to a certain programming language or stack, but simply how to make your mind better at it, ...
4
votes
1answer
301 views

Name for a bug that disappears when someone else looks at it [closed]

Does anyone know of an existing name for a bug that disappears the moment you call someone over to look at it? It's a funny phenomenon, but it has happened from time to time that I'm working on a bug ...
2
votes
1answer
483 views

How to debug through a swing based application effectively

I am trying to understand how a radio button is created in a Dynamic field by reading from an XML using Netbeans 7.0. I know the radio button is created because of the XML being read from database, ...
56
votes
9answers
5k views

How do you debug without an IDE? [closed]

Every time I look for an IDE (currently i'm tinkering with Go), I find a thread full of people recommending Vi, Emacs, Notepad++ etc. I've never done any development outside of an IDE; I guess I've ...
7
votes
2answers
4k views

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 ...
44
votes
5answers
10k views

Why is reverse debugging rarely used? [closed]

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 ...
1
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2answers
283 views

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 ...
9
votes
5answers
961 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. ...
1
vote
3answers
355 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 well-...
24
votes
4answers
27k views

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 ...
1
vote
2answers
17k views

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 ...
3
votes
2answers
527 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 ...
4
votes
7answers
3k views

Programming Interview : How to debug a program? [closed]

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 ...
3
votes
6answers
2k views

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 ...
25
votes
3answers
5k views

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 ...
1
vote
1answer
238 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 ...
7
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4answers
7k views

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?
44
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7answers
3k views

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 ...
6
votes
2answers
1k 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 / ...