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  • Get_user running at kernel mode returns error

    - by Fangkai Yang
    Hi, all, I have a problem with get_user() macro. What I did is as follows: I run the following program int main() { int a = 20; printf("address of a: %p", &a); sleep(200); return 0; } When the program runs, it outputs the address of a, say, 0xbff91914. Then I pass this address to a module running in Kernel Mode that retrieves the contents at this address (at the time when I did this, I also made sure the process didn't terminate, because I put it to sleep for 200 seconds... ): The address is firstly sent as a string, and I cast them into pointer type. int * ptr = (int*)simple_strtol(buffer, NULL,16); printk("address: %p",ptr); // I use this line to make sure the cast is correct. When running, it outputs bff91914, as expected. int val = 0; int res; res= get_user(val, (int*) ptr); However, res is always not 0, meaning that get_user returns error. I am wondering what is the problem.... Thank you!! -- Fangkai

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  • What considerations should be made for a web app to be released on a cloud hosted system?

    - by Rhubarb
    I have a web app that is primarily a WordPress app, but it pulls content from a Django app, simply by calling a service that uses Django models. My understanding of cloud computing is a bit vague. If the site needs to scale up with short notice, does the cloud provider (Amazon, Rackspace, whomever) simply spin up new instances (copies) of my initially configured server? How is state managed between all of them? Are there any good primers on this subject? It's hard to find much out there without getting caught up in the marketing.

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  • Aspiring Web Developer

    - by ihaveitnow
    Hi guys, I want to be a web developer and mobile web developer...I know HTML Iv done some research and read that XML and XHTML are necessary. Are there any other languages that I need to know? Would knowledge of Flash help me in my quest? I also want to become an Android App developer :) (go open-source!) But thats for a different post. I hope I can make links within this community, thanks for reading and even more for responses.

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  • Develop applications to mobiles

    - by muek
    Hi there, I have very easy question, but I simply have any idea of the answer. I have developed a small mobile-application using java, for my nokia. The problem is that when installed on my samsung the application simply crashed. Then I tried on my other nokia but different model, and I didn't got the normal behavior. So my question is, does anyone have any idea how companies that develop mobiles applications/games test their software. Does they have to have all models for all mobiles phones??

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  • MS Query Analizer/Management Studio replacement?

    - by kprobst
    I've been using SQL Server since version 6.5 and I've always been a bit amazed at the fact that the tools seem to be targeted to DBAs rather than developers. I liked the simplicity and speed of the Query Analizer for example, but hated the built-in editor, which was really no better than a syntax coloring-capable Notepad. Now that we have Management Studio the management part seems a bit better but from a developer standpoint the tools is even worse. Visual Studio's excellent text editor... without a way to customize keyboard bindings!? Don't get me started on how unusable is the tree-based management hierarchy. Why can't I re-root the tree on a list of stored procs for example the way the Enterprise Manager used to allow? Now I have a treeview that needs to be scrolled horizontally, which makes it eminently useless. The SQL server support in Visual Studio is fantastic for working with stored procedures and functions, but it's terrible as a general ad hoc data query tool. I've tried various tools over the years but invariably they seem to focus on the management side and shortchange the developer in me. I just want something with basic admin capabilities, good keyboard support and requisite DDL functionality (ideally something like the Query Analyzer). At this point I'm seriously thinking of using vim+sqlcmd and a console... I'm that desperate :) Those of you who work day in and day out with SQL Server and Visual Studio... do you find the tools to be adequate? Have you ever wished they were better and if you have found something better, could you share please? Thanks!

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  • I do not know whether it should continue to develop this code sharing service :(

    - by user296268
    I created an open source Project : TwPaste on github. It provides The Social Source Code and Plain Text Sharing Service. You can post any source code here , All pastes and comments will post to twitter . I'm not sure the usefulness of this project , so I need your feedback to improve it , if you think it is useless , please tell me directly, I'll close it soon. Thanks. You can access it form below link twpaste.com

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  • Is it possible to stop a javascript with Firebug without using breakpoints?

    - by Sandra
    Is it possible with Firebug to stop a javascript with a press of a button or a keyboard shortcut instead of stopping it by setting a breakpoint? Why would I like to do this? We have a very dynamic website with lots of animations. It would be a great help if I could just stop the scripts at the moment the animation is doing something I want to inspect. That would be a lot faster than fiddling with the breakpoints.

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  • How to set focus to a web control in ASP.NET

    - by Dan7el
    Question: What is the best way to set focus to a web control in ASP .NET. I can do it, but it's ugly. I have a web control wrapped in a web control hosted on a web page. So, if you do a view | source on the page the id is something like WrapperControl_Control_TextBox. I've tried the "tried and true" Javascript methods of grabbing the element and setting it's focus: document.getElementByID( "WrapperControl_Control_TextBox" ).focus(); and it didn't work. I'm not sure why. I know I could possibly do: document.getElementById( "<%= TextBox.ClientID %" ).focus(); too, I think. This won't work because of another totally separate error based on the fact you can't dynamically add controls to a header if there is a "<% %" in the page. GAH. In the "bottom-most" control, I've tried setting the focus (TextBox.Focus() in Page_Load) and that doesn't work either. Anyway, the way that works is by simply taking the ControlsCollection of the Page, grabbing the control I need from that, getting it's collection, grabbing the next lower control and so forth. I only have to do this seven times. So I have eight foreach loops. Basically, my code is like this: /////////////////////////////// // On the page /////////////////////////////// ControlCollection controls = Controls; foreach( Control control in controls) { if ( string.Equals( control.ID, "FormID", StringComparison.InvariantCultureIgnore ) ) { ControlCollection nextControls = control.Controls; foreach( Control nextControl in nextControls ) { if ( string.Equals( nextControl.ID, "DivICareAboutInTheForm", StringComparison.InvariantCultureIgnor ) ) { ControlCollection nextNextControls = nextControl.Controls; //: //: //Yes, it's that bad and so forth. //: //: } } } }

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  • Turning off antialiasing in Löve2D

    - by cjanssen
    I'm using Löve2D for writing a small game. Löve2D is an open source game engine for Lua. The problem I'm encountering is that some antialias filter is automatically applied to your sprites when you draw it at non-integer positions. love.graphics.draw( sprite, x, y ) So when x or y is not round (for example, x=100.24), the sprite appears blurred. The same happens when the sprite size is not even, because (x,y) points to the center of the sprite. For example, a sprite which is 31x30 big will appear blurred again, because its pixels are painted in non-integer positions. Since I am using pixel art, I want to avoid this all the way, otherwise the art is destroyed by this effect. The workaround I am using so far is to force the coordinates to be round by littering the code with calls to math.floor(), and forcing all the sprites to have even sizes by adding a row or column of transparent pixels with the paint program, if needed. Is there some command to deactivate the antialiasing I can call at program startup?

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  • Not able to override CSS within IFrame

    - by Madhur Ahuja
    I am using disqus comments for my jekyll blog with some CSS styles overriden in my stylesheet and used to work perfectly. Recently, disqus has introduced a new UI for their comments system which has completely broken the font colors. Since my site has dark background, I am trying to apply styles based on new disqus HTML structure generated. However, it seems that none of my styles get applied. It seems that is because disqus is loaded within iframe. Any ideas how can I fix the font colors. Example of the post: http://www.madhur.co.in/blog/2012/03/27/codeplexmovegit.html UPDATE Based on this question How to apply CSS to iFrame? it seems that you cannot style a child IFrame cross domain. I am wondering how it used to work earlier. Disqus even has documentation on it http://docs.disqus.com/help/69/

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  • Regarding using LinkedIn API?

    - by Charlie Epps
    Hi all, My idea is to connect to LinkedIn through the API and work on the public data. My area of concern is where to find Linkedin API and how to use it. I have search a lot but landed no where. Please help me in this regard.

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  • Grails application hogging too much memory

    - by RN
    Tomcat 5.5.x and 6.0.x Grails 1.6.x Java 1.6.x OS CentOS 5.x (64bit) VPS Server with memory as 384M export JAVA_OPTS='-Xms128M -Xmx512M -XX:MaxPermSize=1024m' I have created a blank Grails application i.e simply by giving the command grails create-app and then WARed it I am running Tomcat on a VPS Server When I simply start the Tomcat server, with no apps deployed, the free memory is about 236M and used memory is about 156M When I deploy my "blank" application, the memory consumption spikes to 360M and finally the Tomcat instance is killed as soon as it takes up all free memory As you have seen, my app is as light as it can be. Not sure why the memory consumption is as high it is. I am actually troubleshooting a real application, but have narrowed down to this scenario which is easier to share and explain.

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  • What is the ideal length of an URL slug

    - by Sinan
    To make pretty URL's from article titles I am using a simple function. However lately I an concerned about the ideal length of these "slugs". It is said that too many dashes are bad. However some article titles can be long and a too long URL may not be liked by google. Of course that defeats th whole idea of having URL slugs. So does anyone have any idea how long a URL slug should be. Should there be a limit on the "dash" charecters used?

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  • QuadTrees - how to update when internal items are moving

    - by egarcia
    I've implemented a working QuadTree. It subdivides 2-d space in order to accomodate items, identified by their bounding box (x,y,width,height) on the smallest possible quad (up to a minimum area). My code is based on this implementation (mine is in Lua instead of C#) : http://www.codeproject.com/KB/recipes/QuadTree.aspx I've been able to successfully implement insertions and deletions successfully. I've turn now my attention to the update() function, since my items' position and dimensions change over time. My first implementation works, but it is quite naïve: function QuadTree:update(item) self:remove(item) return self.root:insert(item) end Yup, I basically remove and reinsert every item every time they move. This works, but I'd like to optimize it a bit more; after all, most of the time, moving items still remain on the same quadTree node most of the iterations. Is there any standard way to deal with this kind of update? In case it helps, my code is here: http://github.com/kikito/passion/blob/master/ai/QuadTree.lua I'm not looking for someone to implement it for me; pointers to an existing working implementation (even in other languages) would suffice.

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  • How to represent a Board Panel in Java for a game ?

    - by FILIaS
    I wanna fix a 2D board for a game. I've already fixed other panels for the Gui and everything goes well. But the panel for the board cant be printed on the window. I'm a bit confused about it as i think i've followed the same ideas as for the others panels i need. Here's what i've done: EDIT:*EDIT* what i'm trying to do is fix a board panel for the game according to the dimensions of the it,hold every square in an array in order to use it after wherever it;s needed. I draw each little square of it with the method draw and put it back to the panel. So, each square on the board is a panel. This is the idea. But as u can see. There are troubles/errors on it. EDIT: code updated. just found a part of the problem. i thought first that i had set background to squared, but i didnt. with this one it appears on the panel a wide black "column". Unfortunately,still none squares. :( One More EDIT: Also,i realized that draw method is never called. when i put the draw method in the following method i can see the squares but they remain small. I redefine them with setSize but still no change. How can I use paint method to edit the panels properly???? As it is now it can't. Even it can't return an object(eg panel) as it's polymorphic void! /** *Method used to construct the square in the area of the *gui's grid. In this stage a GUISquare array is being constructed, * used in the whole game as *a mean of changing a square graphical state. *@param squares is the squares array from whom the gui grid will be *constructed. *@see getSquare about the correspondance beetween a squareModel and * a GUISquare. */ private void initBoardPanel(SquareModel[][] squares){ BoardPanel.setLayout(new GridLayout(height ,width )); //set layout SquareRenderer[][] Squares; JPanel[][] grid; Squares=new GUISquare[height][width()]; grid=new JPanel[height()][width()]; for (int i=0; i<height(); i++){ for (int j=0; j<width() ; j++){ SquareRenderer kou=new SquareRenderer(i,j); kou.setSquare(myGame.getSquares()[i][j]); //NOTE: THE FOLLOWING DRAW METHOD CANT BE CALLED!!!? if (myGame.getSquares()[i][j] instanceof SimpleSq ){ kou .paintPanel(i,j,"");} else if (myGame.getSquares()[i][j] instanceof ActionSq ) { kou .paintPanel(i,j); } //JUST BECAUSE DRAW CANT BE CALLED I PUT ITS CODE HERE: //JUST TO CHECK: JPanel panel = new JPanel(); panel.setLayout(new BorderLayout()); JLabel label1 = new JLabel("Move To "+myGame.getSquares()[i][j].getGoTo()); JLabel label2 = new JLabel(""+myGame.getSquares()[i][j].getSquare()); panel.setBackground(Color.ORANGE); panel.add(label2, BorderLayout.NORTH); panel.add(label1, BorderLayout.CENTER); panel.setSize(250,250); ///////// <--until here ---paint method<--- kou.add(panel); kou.setVisible(true); kou.setBackground(Color.BLACK); Squares[i][j]= kou; BoardPanel.add(kou); BoardPanel.setVisible(true); BoardPanel.setBackground(Color.WHITE); } } this.add(BoardPanel,BorderLayout.WEST); // this.pack(); //sets appropriate size for frame this.setVisible(true); //makes frame visible } IMPLEMENTED BY SQUARERENDERER: /** * Transformer for Snake/Ladder * <br>This method is used to display a square on the screen. */ public void paintPanel(int i,int j) { JPanel panel = new JPanel(); panel.setLayout(new BorderLayout()); JLabel label1 = new JLabel("Move To"+myGame.getSquares()[i][j].getGoTo()); JLabel label2 = new JLabel(""+myGame.getSquares()[i][j].getSquare()); JSeparator CellSeparator = new JSeparator(orientation); panel.add(CellSeparator); panel.setForeground(Color.ORANGE); panel.add(label2, BorderLayout.NORTH); panel.add(label1, BorderLayout.CENTER); }

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  • Changing the background colour of lines in the stack

    - by Mongus Pong
    I have just changed the colour scheme of my Visual Studio 2008 environment to have a dark backround with light text. This is so much easier on the eyes. The only problem is lines that are on the call stack... Those lines that are referred to in this thread here in visual studio some lines of code have light grey background while debugging These lines have a bright grey background, which against my light text means I cannot read the text at all. I have been through every single colour in Tools - Options - Fonts and Colours and cannot find one that matches. How can I change the background for lines on the current call stack?

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  • I have a bunch of divs floated left, lined up in columns with different heights. They dont create a

    - by Roeland
    Hey guys, I am trying to create a grid like system with div's with content floated left. The problem is that the height of each div is not static since the content is different in each one. Since the height is different.. things get outta whack if one is taller then another in one row. Is there some sort of css way or js (prefer javascript) way to get around this. I really want to avoid setting large heights on the divs to get them to line up. You can see the example here: http://www.foreclosurejournalinc.com/index.php?option=com_hotproperty&view=type&id=1

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  • Personal project/idea database and tracking

    - by cbrulak
    How do you keep track of your personal projects and ideas? If you come up with this amazing idea how do you write it down? Notepad? Some text file somewhere? How do you track your progress,etc? I'm not talking about FogBugz,etc as they are for tracking team work, I'm talking about tracking my ideas and projects and any associated content (notes,screenshots,etc) Can you put your solution on a thumb drive? Any suggestions for other developers?

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