Let me apologize in advance for the new-guy quality of this question. I would much rather be asking a question about something more interesting, like a challenging Project Euler question or evolutionary algorithms, but alas I am stuck with major VSE 2012 problems.
Up until around four hours ago, VSE 2012 worked perfectly fine. Now, I can't even run a simple "Hello, World" program. No compile errors, although I did have an issue with symbols not being found at the beginning of this nightmare, but I managed to resolve that. It compiles, but it does not run. The console window appears, but no output is displayed, no prompt for input is displayed, nothing is processed. All that appears is the "Please press any key to continue..."
I'm starting to think that my configuration of VSE is corrupted, that maybe I need to uninstall, reboot, and reinstall it all, but I'm hoping that's not the case. My version of VSE is up to date, as is my redistributable. My specs are pretty normal, XPS 15z run-of-the-mill laptop running Windows 7, handled VSE perfectly fine for several months until now.
Since VSE started to act up I have been operating through the command line, although I'm really starting to miss an IDE for C++, it just isn't the same. If VSE doesn't start looking up, I'll just have to get a plug-in for Eclipse or actually put in the time to learn how to use Emacs (maybe this is a sign? haha).
I'm sorry for the rant. Has anyone experienced problems like this? The problem isn't that my program is running too quickly (at least I don't think), since prompting for user input doesn't work, nor does the dreaded system("pause").
Any help will be greatly, greatly appreciated. Let me know if you need more information.
Reinstall it. If it's compiling and running correctly through the command line then it's a problem with VS.
Considering the issue with the symbols, it sounds like you have the choice of either reinstalling or spending a potential several hours fixing some super specific configuration corruption case.
Just now i was interviewed by ca(Computer Associates) for a C++ opening.
Q:There is an application that continuously runs for days.. at some day it becomes non-responsive/gets hanged.How would you Debug/rectify the application.What will be your first steps?
A:I answered starting with .. having a check on memory usage details/CPU usage..checking if some of the required resources are available...or if it is network bound,if the network is live..etc..
Q:He told.. these are all superficial things.. assume no such problem is there..then?
A:I told the best way is to check the debug logs if they are enabled..and if they arent..give the customer a debug enabled application and test it in the field.
Because the application is hanging intermittently..its very difficult to detect through any other way why it would go unresponsive..And debug logs would tell me at what instant the application starts to go mad,as to find the root cause the specific operation responsible needs to be known,and debug logs are what i think the best bet.
The interviewer switched to another question says .. ok fine.
So,was my answer good enough.Any other approach that a good programmer would follow?
Use WinDbg or create a (mini) dump file and load it up in your Visual Studio. Load debugging symbols for all the release binaries, and see exactly where it is hung
That should be a decent first step
Edit Of course I was (foolishly) assuming windows for no apparent reason. On UNIX/linux this would be even easier using strace, ptrace, gdb --remote, pstack, dtrace (if it's there) etc
Edit Also using WMI performance counters/perfmon is a very good practice in general. This would perhaps shed some light (but I'm sure the interviewer was looking for the 'How do I inspect a running application' type of answer; this is slightly leaning to the 'depend on logging' approach that you already had mentioned in your own answer)
Most of the times such questions cannot be answered to the point because they are very much subjective. They are usually asked to evaluate & judge how a potential candidate approaches a problem and shows some constructive approach of debugging the problem. As long as the answer shows some logical methodology of tackling the problem the answer is good.
Your answer was good. To add to it, Most important is to identify the use case/pattern where the problem occurs. If a problem is reproducble easily it is solvable. So I would try to define steps to reproduce the problem and then move ahead with steps to tackle it.
I just downloaded and built the libraries/executables of Google Performance Tools. Before I run the CPU profiler on the application that I want to investigate, I want to learn how to use the tools properly perhaps on a sample application. What would be a good example to run the Google CPU profiler on? Thanks in advance.
The following paragraph appears in the README.windows file distributed with perftools 1.3:
The heap-profiler has had a preliminary port to Windows. It has not been well tested, and probably does not work at all when Frame Pointer Optimization (FPO) is enabled -- that is, in release mode. The other features of perftools, such as the cpu-profiler and leak-checker, have not yet been ported to Windows at all.
In my experience, for performance tuning, stack-sampling is the method of choice.
Google perftools contains a stack-sampler, and I believe its visual analyzer can be made to show the cost of individual statements, not just functions.
What you need to know is the percent of time the stack contains that statement, because that is how much time would be saved if the statement were removed.
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Briefly: Does anyone know of a GUI for gdb that brings it on par or close to the feature set you get in the more recent version of Visual C++?
In detail: As someone who has spent a lot of time programming in Windows, one of the larger stumbling blocks I've found whenever I have to code C++ in Linux is that debugging anything using commandline gdb takes me several times longer than it does in Visual Studio, and it does not seem to be getting better with practice. Some things are just easier or faster to express graphically.
Specifically, I'm looking for a GUI that:
Handles all the basics like stepping over & into code, watch variables and breakpoints
Understands and can display the contents of complex & nested C++ data types
Doesn't get confused by and preferably can intelligently step through templated code and data structures while displaying relevant information such as the parameter types
Can handle threaded applications and switch between different threads to step through or view the state of
Can handle attaching to an already-started process or reading a core dump, in addition to starting the program up in gdb
If such a program does not exist, then I'd like to hear about experiences people have had with programs that meet at least some of the bullet points.
Does anyone have any recommendations?
Edit:
Listing out the possibilities is great, and I'll take what I can get, but it would be even more helpful if you could include in your responses:
(a) Whether or not you've actually used this GUI and if so, what positive/negative feedback you have about it.
(b) If you know, which of the above-mentioned features are/aren't supported
Lists are easy to come by, sites like this are great because you can get an idea of people's personal experiences with applications.
Eclipse CDT will provide an experience comparable to using Visual Studio. I use Eclipse CDT on a daily basis for writing code and debugging local and remote processes.
If you're not familiar with using an Eclipse based IDE, the GUI will take a little getting used to. However, once you get to understand the GUI ideas that are unique to Eclipse (e.g. a perspective), using the tool becomes a nice experience.
The CDT tooling provides a decent C/C++ indexer that allows you to quickly find references to methods in your code base. It also provides a nice macro expansion tool and limited refactoring support.
With regards to support for debugging, CDT is able to do everything in your list with the exception of reading a core dump (it may support this, but I have never tried to use this feature). Also, my experience with debugging code using templates is limited, so I'm not sure what kind of experience CDT will provide in this regard.
For more information about debugging using Eclipse CDT, you may want to check out these guides:
Interfacing with the CDT debugger, Part 2: Accessing gdb with the Eclipse CDT and MI
CDT Debug Tutorial
gdb -tui works okay if you want something GUI-ish, but still character based.
You won't find anything overlaying GDB which can compete with the raw power of the Visual Studio debugger. It's just too powerful, and it's just too well integrated inside the IDE.
For a Linux alternative, try DDD if free software is your thing.
Check out Nemiver C/C++ Debugger. It is easy to install in Ubuntu (Developer Tools/Debugging).
Update: New link.
Qt Creator seems like good stuff. A colleague showed me one way set it up for debugging:
Create a new project, "Import of Makefile-based Project".
Point it to your root project folder (it will index sources under it, and it is impressively fast).
Go to project settings and add a run configuration, then specify the executable you want to debug, and its arguments.
Qt Creator seems to insist on building your project before debugging it. If you don't want that, or don't use make, just go to projects -> build (Left panel), then, on the right panel in "Build Steps", remove all the steps, including the step by default when you created the project.
That may seem like a bit much work for debugging an app I had already compiled, but it is worth it. The debugger shows threads, stacks and local variables in a similar way to Visual Studio and even uses many of the same keyboard shortcuts. It seems to handle templates well, at least std::string and std::map. Attaching to existing processes and core dumps seems to be supported, though I haven't tested it yet.
Keep in mind that I used it for less than and hour now, but I'm impressed so far.
I loathe the idea of Windows development, but the VC++ debugger is among the best I've seen. I haven't found a GUI front end that comes close to the VC one.
GDB is awesome once you really get used to it. Use it in anger enough and you'll become very proficient. I can whiz around a program doing all the things you listed without much effort anymore. It did take a month or so of suffering over a SSH link to a remote server before I was proficient. I'd never go back though.
DDD is really powerful but it was quite buggy. I found it froze up quite often when it got messages from GDB that it didn't grok. It's good because it has a gdb interface window so you can see what's going on and also interact with gdb directly. DDD can't be used on a remote X session in my environment (a real problem, since I'm sitting at a thin client when I do Unix dev) for some reason so it's out for me.
KDevelop followed typical KDE style and exposed EVERYTHING to the user. I also never had any luck debugging non KDevelop programs in KDevelop.
The Gnat Programming Studio (GPS) is actually quite a good front-end to GDB. It doesn't just manage Ada projects, so it's worth trying out if you are in need of a debugger.
You could use Eclipse, but it's pretty heavy weight and a lot of seasoned Unix people I've worked with (me included) don't care much for its interface, which won't just STFU and get out of your way. Eclipse also seems to take up a lot of space and run like a dog.
I use cgdb, simple and usefull
I use DDD a lot, and it's pretty powerful once you learn to use it. One thing I would say is don't use it over X over the WAN because it seems to do a lot of unnecessary screen updates.
Also, if you're not mated to GDB and don't mind ponying up a little cash, then I would try TotalView. It has a bit of a steep learning curve (it could definitely be more intuitive), but it's the best C++ debugger I've ever used on any platform and can be extended to introspect your objects in custom ways (thus allowing you to view an STL list as an actual list of objects, and not a bunch of confusing internal data members, etc.)
I used KDbg (only works under KDE).
Check out the Eclipse CDT project. It is a plugin for Eclipse geared towards C/C++ development and includes a fairly feature rich debugging perspective (that behind the scenes uses GDB). It is available on a wide variety of platforms.
DDD is the GNU frontend for gdb: http://www.gnu.org/software/ddd/
Similar comfortable to the eclipse gdb frontend is the emacs frontend, tightly tied to the emacs IDE. If you already work with emacs, you will like it:
GDB Emacs Frontend
Qt Creator-on-Linux is certainly on par with Visual Studio-on-Windows for C++ nowadays. I'd even say better on the debugger side.
I've tried a couple of different guis for gdb and have found DDD to be the better of them.
And while I can't comment on other, non-gdb offerings for linux I've used a number of other debuggers on other platforms.
gdb does the majority of the things that you have in your wish list. DDD puts a nicer front on them. For example thread switching is made simpler. Setting breakpoints is as simple as you would expect.
You also get a cli window in case there is something obscure that you want to do.
The one feature of DDD that stands out above any other debugger that I've used is the data "graphing". This allows you to display and arrange structures, objects and memory as draggable boxes. Double clicking a pointer will open up the dereferenced data with visual links back to the parent.
There's one IDE that is missing in this list and which is very efficient (I've used it in many C/C++ projects without any issues): Netbeans.
What can be stepped through is going to be limited by the debugging information that g++ produces, to a large extent. Emacs provides an interface to gdb that lets you control it via the toolbars/menus and display data in separate windows, as well as type gdb commands directly. Eclipse's CDT provides similar tools. I've heard of Anjuta and Code::Blocks but never used them.
As someone familiar with Visual Studio, I've looked at several open source IDE's to replace it, and KDevelop comes the closest IMO to being something that a Visual C++ person can just sit down and start using. When you run the project in debugging mode, it uses gdb but kdevelop pretty much handles the whole thing so that you don't have to know it's gdb; you're just single stepping or assigning watches to variables.
It still isn't as good as the Visual Studio Debugger, unfortunately.
Have you ever taken a look at DS-5 debugger?
There is a paid version which includes a lot of helpful features, but you can also use Community Edition for free (which is also quite useful especially for embedded systems).
I have a positive experience with this tool when debugging Android applications on real device using eclipse.
You don't mention whether you are using Windows or UNIX.
On UNIX systems, KDevelop is good but I use KDbg because it is easy to use and will also work with apps not developed in KDevelop.
Eclipse is good on both platforms.
On Windows, there is a great package called Wascana Desktop Developer which is Eclipse CDT and MinGW all packaged up and preconfigured nicely for the minimum of pain. Its the best thing I've found for developing GNU code on Windows.
I have used all these debuggers and none of them are as good as MS Dev Studio. Eclipse/Wascana is probably the closest but it does have limitations like you cannot step into DLLs and it doesn't do as good a job at examining variables.
The Code:Blocks C++ IDE has a graphical wrapper, with a few of the features you want, but nothing like the power of VS.
VisualGDB is another Visual Studio plugin to develop and debug applications on linux and embedded platforms.
KDevelop works pretty well.
Have you tried gdb -w with cygwin gdb.
It is supossed to have a windows interface which works fairly well.
The only problem I found is that on my present machine it didn't run that way until after I installed ddd. I suspect that it requires tcltk which was installed when I installed ddd.
Latest version of Geany supports it (only on Linux, though)
If you are looking for gdb under Visual Studio, then check WinGDB.
In the last 15 months I use insight (came with FC6). It is not great, it is written in Tcl/Tk, but it is simple and useful. DDD is of similar quality / utility, but somewhat harder to use (various GUI gotchas and omissions). I also tried to integrate gdb with my IDE, SlickEdit. It worked OK (I played some 4 hours with it), but I did not like the GUI context switches. I like my IDE to remain unchanged while I am debugging; on Windows I use SlickEdit for IDE and Visual Studio Debugger for debugging. So from the 3: Insight, DDD and SlickEdit, Insight is my 1st choice, I use it >95% of the time, command-line gdb and DDD make up the other 5%. If I get the chance, I will eval Eclipse at some point, my work PC does not seem to have enough RAM (1GB only) to run Eclipse reasonably well.
I have also heard a lot of praise for TotalView, including 1st hand during a job interview. I obtained an eval for our company in late 2008, but in the end we did not proceed as gdb was good enough for our needs; and it is free and ubiquitous.
Use www.zero-bugs.com/
Zero debugger, it requires C++0x support from gcc
I was searching for a debugger to step through a running programm. Say: Attach. The programm was build with eclipse, but because of maybe some multithreadding obstrucles, no sourcefiles where fond. What ever.
I got very compfortable with NetBeans.
[debug] from menu -> Attach Deugger...
as process chose the one to debug
as project [new project]
Now the window disappars and you see nothing. detach from the process. The Read Square "Stop" helps.
import source from the project as e.g. folder. ".../MyProject/src
Now it appears in your project, and you can set breakpoints.
again ttach debugger
chose the process to debug.
debugger should stop if programm reaches next breakpoint.
Going to [window] -> [Debugging] -> Will your window make compfortable.