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  • Broken if statement

    - by Vladimir Nani
    Maybe I am crazy but how that could be? some == null is always false but debugger goes into if-statement body anyway. Any ideas? I have restarted visual studio I have cleaned every bin/obj folder It is not the case that i don`t understand that WindowsIdentity.GetCurrent() may return null. That was my first idea. var some = new object(); if (some == null) { throw new Exception("hi!"); } else { do(); } My code: private void GetCurrentWindowsIdentity() { var identity = WindowsIdentity.GetCurrent() if (identity == null) { throw new Exception(Errors.IdentityIsNullException); } try { if (CurrentAuthenticationWrapper.AuthenticationType == AuthenticationType.Windows) { CurrentLogin = _identity != null ? _identity.Name : string.Empty; } } catch (Exception ex) { ViewManager.ShowError(ex); } _identity = identity; }

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  • How to break whenever any line of code executes

    - by Aequitarum Custos
    I have a very strange bug, which I believe is caused by some code we have executing, but I'm not sure where. We can reproduce it to the point it happens whenever we click Tab, but short of putting a break point at the beginning of every method in the project to find out what is executing. Is there a way to set visual studio to break whenever anything executes? For those curious about the problem, every now and then, we have a few Rich Text Boxes that refuse to lose focus. You can't click out of it or tab out of it. We have no On Validation or On Text Changed events attached to the control, and believe it's an event attached somewhere else to something we just aren't noticing.

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  • Is a program compiled with -g gcc flag slower than the same program compiled without -g?

    - by e271p314
    I'm compiling a program with -O3 for performance and -g for debug symbols (in case of crash I can use the core dump). One thing bothers me a lot, does the -g option results in a performance penalty? When I look on the output of the compilation with and without -g, I see that the output without -g is 80% smaller than the output of the compilation with -g. If the extra space goes for the debug symbols, I don't care about it (I guess) since this part is not used during runtime. But if for each instruction in the compilation output without -g I need to do 4 more instructions in the compilation output with -g than I certainly prefer to stop using -g option even at the cost of not being able to process core dumps. How to know the size of the debug symbols section inside the program and in general does compilation with -g creates a program which runs slower than the same code compiled without -g?

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  • Analyzing CPU usage of an iOS application

    - by Mustafa
    I'm working on an application that constructs springboard like interface (like iPhone's home screen). I have multiple pages, and each page contains many subviews. Each subview is able to detect touch and hold event. Once a touch and hold event is recognized, all the subviews start to wobble. One of the problems that i'm facing is that the CPU usage shoots to 99%, when the subviews are in wobble state, and i change the page. Instruments has a tool by the name of "CPU Sampler". I'm unable to find good set of documentation for this tool. I don't know how to read the output generated by this tool. Can anyone give me a small tutorial or guidelines? Can i check which piece of code is responsible for the CPU activity?

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  • How to print absolute line number in uncaught exception?

    - by DSblizzard
    When error occured Python prints something like this: Traceback (most recent call last): File "<stdin>", line 2, in <module> File "<stdin>", line 8, in m File "<stdin>", line 5, in exec_st File "<stdin>", line 9, in exec_assign File "<stdin>", line 48, in ref_by_id IndexError: list index out of range where 2, ... , 48 are relative line numbers which are not very convenient. How to print absolute line numbers in such error messages? EDIT: Maybe it's a dumb question, but answer will facilitate development a little. I'm printing text in several files. When done, press shortcut which runs python and copies contents of current file to console. Proposed solution forces to press excess keystrokes (Ctrl+S, Alt+Tab) and create additional files. I hope I have put it clear.

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  • How do I wrap this BAIL macro in Xcode?

    - by willc2
    I use this little snippet to halt my iPhone app in the simulator. NSAssert((0), @"Bail early while testing"); When I try to make it a #defined macro like this: #define BAILNOW (NSAssert((0), @"Bail early while testing")) I get this build error: error: expected expression before 'do' It seems to be related to the nesting of the NSAssert() macro but I'm at a loss as to how to get around it. Should I dig into the NSAssertionHandler docs or is there some simpler way to halt the app in it's tracks? Or should I just set a breakpoint and get on with my life?

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  • Process.WaitForExit not triggering with __debugbreak

    - by Cypher2100
    I'm trying to write a program to test student code against a good implementation. I have a C++ console app that will run one test at a time determined by the command line args and a C# .net forms app that calls the c++ app once for each test. The goal is to be able to detect not just pass/fail for each test, but also "infinite" (5secs) loop and exceptions (their code dying for whatever reason). The problem is that not all errors kill the C++ app. If they corrupt the heap the system calls __debugbreak which pops up a window saying Debug Error! HEAP CORRUPTION DETECTED... My C# app is using Process.WaitForExit(5000) to wait, but this error doesn't count as an exit, so I see a timeout. So my question is, how can I either get the C# app to detect that this is an error OR how can I get the C++ app to die when this error occurs rather than giving a dialog box and asking if I want to debug?

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  • C++: How to count all instantiated objects at runtime?

    - by nina
    I have a large framework consisting of many C++ classes. Is there a way using any tools at runtime, to trace all the C++ objects that are being constructed and currently exist? For example, at a certain time t1, perhaps the application has objects A1, A2 and B3, but at time t2, it has A1, A4, C2 and so on? This is a cross platform framework but I'm familiar with working in Linux, Solaris and (possibly) Mac OS X.

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  • Debug assertion does not prompt in IIS 7

    - by Shugi
    Hi, since moving to Windows 7 (IIS 7.5), the debug assertions do not prompt a pop up dialog anymore. I have tested this in a separate project, and noticed that they do work when using the integrated Visual Studio Developer server (Cassini) but they do not work when using IIS Web Server. This is a big issue for us since we are counting on debug assertions to identify potential programming errors, so any help would be appreciated. Thanks. Eyal.

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  • Scala Eclipse IDE suddenly ignoring breakpoints

    - by malsmith
    I've been using Scala 2.8RC1 and Scala Eclipse plugin for 2.8 RC1 happily for a few days. However, last night after adding a couple jar files to my environment (apache http client jars) the debugger just stopped stopping at breakpoints in scala code. Java code stops fine at breakpoints. I tried creating a new mimimal scala app breakpoints don't stop. I've tried switching to sun-jre-1.6.0.20 from the openjdk-1.6.18 I had been using. I've switched to the scala 2.8 nightly and also eclipse plugin for scala nightly builds. No luck. I would greatly appreciate ideas for fixes. Rather frustrating as the initial experience with 2.8 was really great.

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  • Safari specific scroll bar issue in legacy code

    - by user1237169
    I am trying to debug an issue that is occurring specifically in Safari. On a few pages of a web application, the content is larger than the frame and a scroll bar appears on the right but when the scroll bar moves up or down the content does not scroll with it. So you can "scroll" the scroll bar but the content itself was inaccessible even though the scroll bar was mobile. The issue only occurs in the "Multi-Process Windows" debug mode option but not in the "Single-Process Windows" option. The scroll bar works perfectly fine in Firefox, IE, and Chrome, just not in Safari. Because there's a lot of legacy code, I'm not quite sure exactly what the actual content is and which specific html elements are relevant. From what I can tell there's an Iframe element, html element, body element, div element, iframe element html element, body element and finally some divs. edit Does it matter if some of the elements within the <iframe> have the attribute scrolling="no"? I see this on a few of the elements within iframe but my coworker reassures me they don't matter.

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  • Print out the variable name objective-C

    - by vodkhang
    Continued from the last question here: Log method name in Obj-C . I just wondered if there is a way to print out the variable name as well. For example: NSString *name = "vodkhang"; NCLog(@"%@", name); and I hope that the output should be: name: vodkhang Just to summarize the previous post, currently, I can print out the class name, method name and the line number when I call NCLog(@"Hello World"); <ApplicationDelegate:applicationDidFinishLaunching:10>Hello world with #define NCLog(s, ...) NSLog(@"<%@:%d> %@", __FUNCTION__, __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__])

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  • debuging native code (C++) using gdb on android with Eclipse. Is it possible?

    - by noisy
    Hi, I have some piece of code which uses JNI. I can debug code wrote in Java directly in Eclipse (using ADT). I even have a script, which help me debug native code with gdb. However this is not very comfortable way for doing this. Is it possible to configure Eclipse to use gdb (I guess gdbserver) for debbuging android native applications? Do you know where I could find any description of this?

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  • WindowsFormsApplicationBase SplashScreen makes login form ignore keypresses until I click on it - how to debug?

    - by Tom Bushell
    My WinForms app has a simple modal login form, invoked at startup via ShowDialog(). When I run from inside Visual Studio, everything works fine. I can just type in my User ID, hit the Enter key, and get logged in. But when I run a release build directly, everything looks normal (the login form is active, there's a blinking cursor in the User ID MaskedEditBox), but all keypresses are ignored until I click somewhere on the login form. Very annoying if you are used to doing everything from the keyboard. I've tried to trace through the event handlers, and to set the focus directly with code, to no avail. Any suggestions how to debug this (outside of Visual Studio), or failing that - a possible workaround? Edit Here's the calling code, in my Main Form: private void OfeMainForm_Shown(object sender, EventArgs e) { OperatorLogon(); } private void OperatorLogon() { // Modal dialogs should be in a "using" block for proper disposal using (var logonForm = new C21CfrLogOnForm()) { var dr = logonForm.ShowDialog(this); if (dr == DialogResult.OK) SaveOperatorId(logonForm.OperatorId); else Application.Exit(); } } Edit 2 Didn't think this was relevant, but I'm using Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase for it's splash screen and SingleInstanceController support. I just commented out the splash screen code, and the problem has disappeared. So that's opened up a whole new line of inquiry... Edit 3 Changed title to reflect better understanding of the problem

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  • node.js express app won't start (or debug) in Eclipse (Nodeclipse)

    - by Ultra
    When I do on my app.js Debug As > Node Application it says Launching STANDALONE_V8 has encountered a problem. Failed to connect to Standalone V8 VM connect timed out It should start an app. Doing so directly on my terminal works fine. When I start a debug session in my terminal and than try to debug it in Eclipse works fine too. So is there anything that has to be done in order to make it work in Eclipse?

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  • Debug vs Trace in C#

    - by koumides
    All, As I understand statements like Debug.WriteLine() will not stay in the code in the Release build. On the other hand Trace.WriteLine() will stay in the code in the Release build. What is controling this behaviour? Does the C# compiler ignores everything from the System.Diagnostics.Debug class when the DEBUG is defined? I am just trying to understand the internals of C# and just curious. Thanks, MK

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  • Debug website on host from virtual machine

    - by Luchaguate
    I have a Windows 7 machine hosting a Windows 7 virtual machine. I am developing a web application using visual studio 2010 on my host machine. I want to run the application in debug mode and access my localhost server from a browser on the virtual machine. (The purpose of this is to be able to debug an application that uses Windows Authentication using different users without having to log off and on for different users on my host machine...) I am using a bridged connection for the virtual machine. I googled how to solve this problem and most of the threads that I found said that if I was using a bridged connection, I could access the server on the host machine by just entering the IP address of my host machine into the url in the browser of the virtual machine. I have tried some different urls using the IP but none of them have worked. As an example, suppose I run my web application in visual studio on my host machine and its url is http://localhost:62789/MyPage.aspx Assume also that I ran ipconfig in CommandPrompt on my host machine and found out that the IP address for my host machine is xxx.xxx.xxx.x. What url should I enter on the virtual machine to access my web application? Thanks in advance.

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  • C# / Visual Studio - Object is null unless I have a Breakpoint

    - by user576611
    Hi Everyone, I'm specifically using the Google Contacts API at the moment, but this could be true of other scinarios as well. I have the following code: Contact newContact = new Contact(); When I let the code run without any breakpoints, I get a NullReferenceException on all of the properties of this object. However, if I put a breakpoint just after this line, I can see all of the properties have been initialises and the rest of my code executes fine. Any idea's would be greatly appreciated

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  • What causes markup-controls to be null?

    - by Earlz
    Ok, I have a very strange problem. I have a regular UserControl with some controls in the markup. At Page_Load these controls are still null. And I have tried EnsureChildControls It is laid out like this: Masterpage - Page - mycontrol1 - mycontrol2 - problemcontrol ProblemControl is where the controls are null. MyControl1 contains MyControl2. MyControl2 is another UserControl which contains ProblemControl in it's markup. Masterpage is nothing special and Page contains MyControl1 in it's markup. The only oddity is that ProblemControl is created dynamically at Page_Init. Everything works fine until I get to ProblemControl where none of the controls are being created. ProblemControl has the proper things all set such as the Page and Parent property. I do not see any problems. The source code for all of these(except ProblemControl) is pretty extensive, so I'm hoping someone can just give me some troubleshooting tips for this problem and if anyone has encountered it before. Also, I can place ProblemControl on another Page control and it will work fine, it's something about mycontrol1 and/or mycontrol2. But we've never had any problems with mycontrol1 and mycontrol2 doesn't have anything I can see wrong with it. (which I've been tediously analyzing for the past few hours). Has anyone else had this same problem? Are there any common things to check for?

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  • jQuery UI .widgets resetting scroll positions of elements contained within

    - by Derek Adair
    I am making heavy use of jQuery UI with my latest project. Unfortunately I've hit a major wall due to some really whacky behavior exhibited by the jQuery UI widgets when they contain elements with scrollbars for overflow. Check out this demo Scroll down in one of the .scroll-container elements Click an accordion header Click on old header - note the element was auto-scrolled to the top. Is there anyway to prevent this from happening? It's screwing with a major plugin of mine that utilizes jQuery scrolling. I'm flat-out lost as to what to do here! Perhaps this is a bug worth mentioning in the jQuery UI dev forums... EDIT I am using Chrome - 8.0.552.231 and OSX 10.6.5

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  • technique for how to debug macros in C

    - by Dervin Thunk
    Hi. So I have the (mostly vilified) #define MAX( a, b ) ( ((a) > (b)) ? (a) : (b) ) somewhere in a program (yes, yes, I know). At some point in the code there is a comparison X>-1?, where X is (as far as I can tell) a (signed) integer. The line is j += MAX(bmGs[i], bmBc[(int)y[i + j]] - m + 1 + i);, where y here is a char*. Not necessarily surprisingly, I find that the macro is returning -1 as the larger number (I'm guessing too long a number for int or an unsigned issue, but I can't find it). I would like to know techniques you guys may have for finding these kinds of errors. Notice that I'm not asking for programming advice about whether or not to use that macro, I'm sure folks are dying to tell me I should refrain from things like that, but the question is going somewhere else. Thanks.

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  • how to debug a query that has valid syntax, executes, but returns no results?

    - by Ty W
    So I'm writing a fairly involved query with a half dozen joins, a dependent subquery for [greatest-n-per-group] purposes, grouping, etc. It is syntactically valid, but I've clearly made at least one mistake because it returns nothing. In the past I've debugged valid queries that return nothing by removing joins, executing subqueries on their own, removing WHERE conditions, and removing grouping to see what I would get but so far this one has me stumped. Are there better tools or techniques to use for this sort of thing? This particular query is for MySQL if it matters for any platform-specific tools.

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