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  • Debuggin in Xcode

    - by huggie
    I'm toying with iPhone app development. Often times I would run into runtime error and I would have no idea where the error occurs (e.g. the exact line). In console app with GCC I could at least compile with the -g flag. dump a core file and read that core file in to get to the last line that got into trouble. But how would I do that in Xcode? Build and Debug doesn't seem to have the debugging symbol loaded.

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  • Overlapping elements stop overlapping in IE7 on class change

    - by Gazzer
    On this page http://zenchan.com/program/ When I rollover the right box 2nd from the top suddenly the overlapping (negative margin disappears). What's happening is that a 'hover' class is being added to shift the background sprite. The two yellow boxes are debugging: if the hover class is put their in advance there is no problem. So fundamentally the CSS is not a problem for IE7 but adding the class is. Any ideas what's causing this. I've tried adding haslayout to various elements but to little effect.

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  • Are global comment systems a privacy concern?

    - by Stefano Borini
    I more and more see these global login-once comment-everywhere systems on every page. I didn't do my homework of tinkering debugging and search before asking, so my question is as follows: You login on site A and leave a comment. Now you go on site B, which uses the same global comment system. At the bottom of the page a request form with your name and data appears for you to add a comment on B page. You don't leave any comment and browse away. Does the global-comment provider get information about the fact that you visited page B, even if you don't leave any comment ? I will dig into the code as soon as I have time, but in the meanwhile I would like to ask your insights on this regard.

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  • Can I have multiple instance of the mandlebrot example in one program?

    - by yan bellavance
    Basically what I did is I took the Mandlebrot example and have 3 instances of it in my program. So the program would look like a mainwindow that has 3 mandlebrot widgets in it, one besides the other. Is it possible that GDB doesnt support debugging multiple intances of a classe that derives from qthread or is it thread-unsafe to do so? I don't have any problems at run-time but when I put breakpoints in a function called by the QThread run() function I get a segmentation fault. I can clearly see that the function doesn't complete before returning to the breakpoint ie I the program stops at the breakpoint, I step into the lines of codes one by one but after a couple of instructions another thread startS using the function(even though they are different instances).

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  • QR Factorization Discrepancy

    - by KyleSum
    I'm trying to get a feel for the Intel MKL library with a simple back-solve (A*x = b) using a QR factorization and comparing my MKL answer to the answer of a known working solution. When my answers didn't come up correct I printed a diff between the Q and R matrices of the known working and the MKL test code. I know MKL/lapack uses "elementary reflectors" to store the values of both the Q and R matrices. So, I'm wondering if these differences (mostly +/-) are by design or the result of some bug. I'm using DGEQRF, DORMQR, and DTRSM routines to solve the system and DORGQR (for debugging) to get the Q matrix shown in the diff. diff with 6x6 matrix (top known, bottom mkl): http://pastebin.com/4uwcME0J

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  • samsung galaxy tab 4 not recognized by eclipse

    - by michael
    the just released samsung galaxy tab 4 tablet does bring up the 'autoplay' box with device options when connected, but is not being recognized by eclipse, nothing shows in the device window. I have enabled debugging on the galaxy tab, including tapping the 'about' box 7 times to make the developer options magically appear. it runs kitkat and the Samsung site has a 'no data available' under the driver tab for this device. since it just came out at target last week it's unlikely there would be a new driver anyway, which has been the usual suggestion for this question on older models.

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  • What's the best way to debug AJAX to PHP calls?

    - by Jascha
    I'm having a miserable time debugging one small function on my new project. Essentially I'm having a user log out via an AJAX call to my log out script on my server called "userfFunctions.php" I'm using AJAX so that I don't have the headache of writing more regex to match my mod_rewrites. Anyway, every so often, it seems as though my Post data just flat out dies and since the PHP is running behind the scenes, I feel like I have no way of finding out where the data flow is being disrupted. BTW This function works 19 hrs of the day. Here is the javascript function: function logOut(){ var data = new Object; data.log_out = true; $.ajax({ type: 'POST', url: 'http://www.mydomain.com/User_Validator', //<-- redirects to userFunctions.php data: data, success: function(data) { alert(data); // <-- a response is triggered but with no response data! } }); } the php side: if(isset($_POST['log_out'])){ echo 'alert this!'; } here is my awesome response:

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  • Even lighter than SQLite

    - by Richard Fabian
    I've been looking for a C++ SQL library implementation that is simple to hook in like SQLite, but faster and smaller. My projects are in games development and there's definitely a cutoff point between needing to pass the ACID test and wanting some extreme performance. I'm willing to move away from SQL string style queries, allowing it to be code driven, but I haven't found anything out there that provides SQL like flexibility while also preferring performance over the ACID test. I don't want to go reinventing the wheel, and the idea of implementing an SQL library on my own is quite daunting, even if it's only going to be simple subset of all the calls you could make. I need the basic commands (SELECT, MODIFY, DELETE, INSERT, with JOIN, and WHERE), not data operations (like sorting, min, max, count) and don't need the database to be atomic, or even enforce consistency (I can use a real SQL service while I'm testing and debugging).

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  • Setting enum values to 4-byte strings - why?

    - by psychotik
    I saw code similar to this in the Mac OS SDK: enum { kAudioFileStreamProperty_ReadyToProducePackets = 'redy', kAudioFileStreamProperty_FileFormat = 'ffmt', kAudioFileStreamProperty_DataFormat = 'dfmt', kAudioFileStreamProperty_FormatList = 'flst', kAudioFileStreamProperty_MagicCookieData = 'mgic', kAudioFileStreamProperty_AudioDataByteCount = 'bcnt', kAudioFileStreamProperty_AudioDataPacketCount = 'pcnt', kAudioFileStreamProperty_MaximumPacketSize = 'psze', kAudioFileStreamProperty_DataOffset = 'doff', kAudioFileStreamProperty_ChannelLayout = 'cmap', kAudioFileStreamProperty_PacketToFrame = 'pkfr', kAudioFileStreamProperty_FrameToPacket = 'frpk', kAudioFileStreamProperty_PacketToByte = 'pkby', kAudioFileStreamProperty_ByteToPacket = 'bypk', kAudioFileStreamProperty_PacketTableInfo = 'pnfo', kAudioFileStreamProperty_PacketSizeUpperBound = 'pkub', kAudioFileStreamProperty_AverageBytesPerPacket = 'abpp', kAudioFileStreamProperty_BitRate = 'brat' }; It's the first time I've seen this - I assume the compiler assigns the 32-bit integer equivalent of the strings to the enum values. I cannot think of a single good reason why this might be preferred over using simple integers. It looks hideous in a debugger (how do you tell which of these values corresponds to 1919247481?) and makes debugging just hard in general. So, is there any reason where assigning such strings to enum values actually makes sense.

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  • MSV1_0 Subauthentication Package Registration

    - by BigShot
    Hi; I'm trying to register a simple MSV1_0 subauthentication package for MS Windows Server 2003. I created a dll which implements required functions described in MSDN. I copied my dll to system32 folder. After that, I created a registry key Auth255 (I also tried Auth128) with a REG_SZ value ,which specifies my dll name, to this location; HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\MSV1_0. I expect that it will create a test.txt file for debugging puposes when the dll is called, but it doesn't create the file. How can I make this work? MSDN Link for this topic; http://msdn.microsoft.com/en-us/library/aa374786%28VS.85%29.aspx

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  • Looking at the C++ new[] cookie. How portable is this code?

    - by carleeto
    I came up with this as a quick solution to a debugging problem - I have the pointer variable and its type, I know it points to an array of objects allocated on the heap, but I don't know how many. So I wrote this function to look at the cookie that stores the number of bytes when memory is allocated on the heap. template< typename T > int num_allocated_items( T *p ) { return *((int*)p-4)/sizeof(T); } //test #include <iostream> int main( int argc, char *argv[] ) { using std::cout; using std::endl; typedef long double testtype; testtype *p = new testtype[ 45 ]; //prints 45 std::cout<<"num allocated = "<<num_allocated_items<testtype>(p)<<std::endl; delete[] p; return 0; } I'd like to know just how portable this code is.

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  • How to connect android application running on a device to a local web application?

    - by guna
    I have my droid device connected through USB and using Eclipse for debugging my application running on the device. Everything is fine, except my application needs to connect to a web application running on the same host computer (Windows XP, IE). The web address on the IE was "http://local:4566/MyApp/". I tried to set my android app to "http://10.0.2.2:4566/MyApp", but no luck. The android app's connection simply times out. The document under http://developer.android.com/guide/developing/tools/emulator.html says that the ip address may be different for devices (see Network Address Space section) but no further details on how to find that. Question is, how to I connect to a local web application running on my host computer (windows xp) from an Android application connected through USB running debug under Eclipse? Appreciate any help. thanks, Guna

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  • Access variable value using string representing variable's name

    - by Paul Ridgway
    Hello everyone, If the title was not clear, I will try to clarify what I am asking: Imagine I have a variable called counter, I know I can see its current value by doing something like: std::cout << counter << std::endl; However, assume I have lots of variables and I don't know which I'm going to want to look at until runtime. Does anyone know a way I can fetch the value of a variable by using its name, for example: std::cout << valueOf("counter") << std::endl; I feel being able to do this might make debugging large complex projects easier. Thanks in advance for your time.

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  • Object viewer control needed (like QuickWatch in VS)

    - by Wallstreet Programmer
    Anyone know of any controls that you can add to your application to allow the user to check out the content of an object? I'm thinking of something like QuickWatch in Visual Studio, just list all properties of an object and its values and allow the user to drill down. I started writing one using reflection but it turned out be a lot of work to handle different kind of collections. This functionality would be used for debugging purposes mostly and not by regular users. I prefer WPF but Winforms would work as well.

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  • ExpandEnvironmentStrings Not Expanding My Variables

    - by Adam Driscoll
    I have a process under the Run key in the registry. It is trying to access an environment variable that I have defined in a previous session. I'm using ExpandEnvironmentStrings to expand the variable within a path. The environment variable is a user profile variable. When I run my process on the command line it does not expand as well. If I call 'set' I can see the variable. Some code... CString strPath = "\\\\server\\%share%" TCHAR cOutputPath[32000]; DWORD result = ExpandEnvironmentStrings((LPSTR)&strPath, (LPSTR)&cOutputPath, _tcslen(strPath) + 1); if ( !result ) { int lastError = GetLastError(); pLog->Log(_T( "Failed to expand environment strings. GetLastError=%d"),1, lastError); } When debugging Output path is exactly the same as Path. No error code is returned. What is goin on?

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  • C# - Check which event changed / accessed a Property

    - by binil
    I have a class with property say private string fieldSelectedItem; public string FieldSelectedItem { get { return fieldSelectedItem; } set { fieldSelectedItem = value; } } it is accessed from many place. I came across a situation that the a property in class is accessed by some event. and also some event is changing the value. i tried debugging. is it possible to check which event/function has changed/accessed the property. is there any method to do so.

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  • Problems getting git 'server' to work on Windows

    - by Benjol
    I've followed the Tim's article (mentioned in the answer to this question), but - like many others, it seems - I'm stuck when trying do the test clone at the end. I get the fatal: the remote end hung up unexpectedly error, even though my $HOME path seems to be right. Anyone got any pointers to where I might start for debugging this? My git and linux-fu are severely limited... I'm aware of this answer to the same question, but it doesn't apply in my case, I don't get any messages about paths.

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  • curl issue with URL not connecting

    - by bmucklow
    So I'm not a very good network person so I was hoping someone could point me in the right direction to figuring out what I am doing wrong. I am trying to use curl to post a SOAP message. I am running the following: curl -d "string of xml message" -H "Content-Type:text/xml; charset=utf-8" ":/" This results in a 'Connection refused' message. So I try pinging ip by itself...no problems. Then I think maybe I need http://:/ so I tried pinging http:// and I get: unknown host http:// yet if I ping the IP by itself I get no issues. Any thoughts on where to start debugging this issue?

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  • Best practices to test protected methods with PHPUnit

    - by GrGr
    Hello, I found the discussion on Do you test private method informative. I have decided, that in some classes, I want to have protected methods, but test them. Some of these methods are static and short. Because most of the public methods make use of them, I will probably be able to safely remove the tests later. But for starting with a TDD approach and avoid debugging, I really want to test them. I thought of the following: Method Object as adviced in an answer seems to be overkill for this. Start with public methods and when code coverage is given by higher level tests, turn them protected and remove the tests. Inherit a class with a testable interface making protected methods public Which is best practice? Is there anything else? It seems, that JUnit automatically changes protected methods to be public, but I did not have a deeper look at it. PHP does not allow this via reflection.

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  • What could cause a returning function to crash? C++

    - by JeanOTF
    So I have been debugging this error for hours now. I writing a program using Ogre3d relevant only because it doesn't load symbols so it doesn't let me stack trace which made finding the location of the crash even harder. So, write before I call a specific function I print out "Starting" then I call the function and immediately after I print "Stopping". Throughout the function I print out letters A-F where F is printed right before the function returns (one line above the last '}') The weird thing is when the crash occurs it is after the 'F' is printed but there is no 'Stopping'. Does this mean that the crash is happening in between somewhere? The only thing I can think of is something going wrong during the deallocation of some of the memory allocated during the function. I've never had anything happen like this, I will keep checking to make sure it's going wrong where I think it is.

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  • How can I display more info in an error message when using NUnit Assert in a loop?

    - by Ian
    Consider the following code: [Test] public void WidgetTest() { foreach (Widget widget in widgets) { Assert.AreEqual(0, widget.SomeValue); } } If one of the asserts fails, I will get a very unhelpful error message like the one below: 1) Test Failure : WidgetTest.TestSomeValue Expected: 0 But was: 1 at WidgetTest.TestSomeValue() So, the question is, how can I get NUnit to display more useful info, such as the name of the widget, or the iteration of the loop, etc? Even a line number would be more helpful, since this is run in automated manner and I'd like to be able to spot the failing assert without debugging into the code.

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  • In Rails, what could cause a user to have another user's session?

    - by DavidNorth
    I have a Rails application using with an authentication system using Restful Authentication without any modification. Users have reported finding themselves logged in as the wrong user. In at least one case it was on their very first page view, never having logged in before. Is it possible their session ids are getting mixed up? Would switching to CookieStore make it impossible for this to happen since no session data is stored on the server this way? I suspect the problem is related to Passenger but I don't know where to start debugging this. Its only happened about 4 times in several months of being live so its virtually impossible to reproduce. Environment: ActiveRecord session storage Rails 2.2.2 Passenger 2.0.1 Apache 2 Ruby 1.8.6 Many thanks

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  • Why doesn't my viewmodel properties get populated

    - by Jakob
    Hi. I've looked all over and I can't figure out why my viewmodel doesn't get populated. I have this code: Followers = new ObservableCollection<aspnet_User>(_followersRepo.aspnet_Users); _followersRepo.Load(_followersRepo.GetUsersFollowingIDQuery(CurrentUserId)); Following = new ObservableCollection<aspnet_User>(_followingRepo.aspnet_Users); _followingRepo.Load(_followingRepo.GetUsersFollowedByIDQuery(CurrentUserId)); CurrentUser = _fullUserRepo.FullUsers.SingleOrDefault(); _fullUserRepo.Load(_fullUserRepo.GetFullUserByIDQuery(CurrentUserId)); But when I debug, there is no data loaded to the Followers, Following and CurrentUser objects. I know that data should be returned because I'm trying to implement the MVVM pattern in my app, and haven't changed the domainservice. Also I can se debugging the CurrentUserId has a value.

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  • /form making table go odd

    - by noryb009
    I have a table (3x3) that counts "< /form" as space in IE. The code for 1 td looks like: <style type="text/css"> table { border-width: 0px; border-collapse: collapse; padding: 0px; } td, th { padding: 0px; } </style> <table><tr><td><form name="form" action="index.php" method="post"><input type="hidden" name="from" value="a" /><input type="image" src="pic1.gif" alt="1" name="submit" value="submit" /></form></td> There is no spaces anywhere outside the tags. Inside the td, there is a form, with a hidden field and a picture. Firefox shows only the picture, but IE has spaces between the rows. I did a little debugging, and found it was from the /form. Does anyone know a fix to this?

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  • How to Get the Method/Function Call Trace for a Specific Run?

    - by JackWM
    Given a Java or JavaScript program, after its execution, print out a sequence of calls. The calls are in invocation order. E.g. main() { A(); } A() { B(); C(); } Then the call trace should be: main -> A() -> B() -> C() Is there any tool that can profile and output this kind of information? It seems this is common a need for debugging or performance tuning. I noticed that some profilers can do this, but I prefer a simpler/easy-to-use one. Thanks!

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