Edit: Odd segmentation fault....

[Paddon]

Hey all,

I keep getting a segmentation fault and I have traced it to the addToolbar line in my code. I see no reason as to why this should be happening but it is. Here is my createGUI() function from my GUI class, the GUIEnviroment is initialized in the GUI class constructor. Please ignore all the printf()'s as those were to help me locate where the problem was occuring.

Code: Select all

void Gui::createGUI(void)
{ printf("Creating GUI..\n"); //last printf to execute
  IGUIToolBar* bar = env->addToolBar(); //This is where the problem must be occuring
  printf("Toolbar Created..\n");
  env->addStaticText(L"Constant Path: ", core::rect<s32>(8,10,90,25), false);
  IGUIEditBox* namebox = env->addEditBox(L"Test/X", core::rect<s32>(100,8,240,25), true, bar, 901);
  printf("Const. Path Box Created..\n");
  env->addStaticText(L"Start#:", core::rect<s32>(250,10,300,25), false);
  IGUIEditBox* range1box = env->addEditBox(L"1", core::rect<s32>(310,8,350,25), true, bar, 902);
  printf("Range1 Box Created..\n");
  env->addStaticText(L"End#: ", core::rect<s32>(360,10,410,25), false);
  IGUIEditBox* range2box = env->addEditBox(L"1", core::rect<s32>(420,8,470,25), true, bar, 903);
  printf("Range2 Box Created..\n");
  IGUICheckBox* sphere_check_box = env->addCheckBox (true,core::rect<s32>(490,8,510,25) , bar, 400, L"Spheres");
  IGUICheckBox* box_check_box = env->addCheckBox (false,core::rect<s32>(530,8,550,25), bar, 400, L"Boxes");
  printf("Check Boxes Created..\n");
  IGUIButton* launchbutton = env->addButton(core::rect<s32>(570,8,600,25), bar, 1101, L"Launch");
  printf("Launch Button Created..\n");
  fpstext = env->addStaticText(L"", core::rect<s32>(850,8,900,25), true);
  timetext = env->addStaticText(L"", core::rect<s32>(910,8,1010,25), true);
  frametext = env->addStaticText(L"", core::rect<s32>(1020,8,1150,25), true);
  printf("Static Text's Created..\n");

  IGUIButton* helpbutton = env->addButton(core::rect<s32>(1750,8,1790,25), bar, 1102, L"Help");
  IGUIButton* prefbutton = env->addButton(core::rect<s32>(1650,8,1740,25), bar, 1103, L"Preferences");
  printf("Help and Pref. Buttons Created..\n");



  IGUISkin* skin = env->getSkin();
  printf("Got Skin..\n");
  IGUIFont* font = env->getFont("../include/fonthaettenschweiler.bmp");
  printf("Got Font..\n");

    skin->setFont(font);
    printf("Font Set..\nBeginning Alpha Loop\n");

  	for (s32 k=0; k<gui::EGDC_COUNT ; ++k)
	{
 		SColor col = env->getSkin()->getColor((gui::EGUI_DEFAULT_COLOR)k);
		col.setAlpha(255);
		env->getSkin()->setColor((gui::EGUI_DEFAULT_COLOR)k, col);
	}
  printf("Alpha Loop Finshed..\n");


  stringw capstr = L"Visualization";
  device->setWindowCaption(capstr.c_str());
  printf("Window Caption Set..\nGUI Finished\n");

}

Any help as to why this creation of a toolbar is giving me a segmentation fault would be greatly appreciated.

[Mikenoworth]

Is env valid? Make sure it is valid.

You could either check it in debug, or add code:

Code: Select all

if(!env)
{
    printf("oopsie, env is bad.\n");
    return;
}

[Paddon]

Nope, I have that exact check in my constructor but it still is not working.

Could it have something to do with the fact that I create a pointer to my GUI class, and then execute it?

i.e. I implement it as follows:

Gui *interface;

interface->createGUI();

Considering nothing else seems wrong this is the only solution I can think of, but it doesn't seem plausible.

[Paddon]

Well I commented out everything in my createGUI function thus it seems that I was wrong about the toolbar being the issue. It is somehow my implementation of this function and/or class.....

[Warchief]

Code: Select all

// This code will fail. Pointer is not valid
GUI* interface;
interface->createGUI();

// This will work
GUI* interface = new GUI();
interface->createGUI(); 

// This will work
GUI interface;
interface.createGUI(); 

Are you creating GUI instance?

[Halan]

looks similiar like a problem i got with my event reciever (still didnt solve it)

http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=14135

greets,
halan

[Paddon]

Interesting, it makes sense it is a null pointer, but can anyone recommend a good debugger as I do not have one right now.

[Mikenoworth]

Look at Warchiefs reply! He is right!

Code: Select all

Code: 

// This code will fail. Pointer is not valid 
GUI* interface; 
interface->createGUI(); 

// This will work 
GUI* interface = new GUI(); 
interface->createGUI(); 

// This will work 
GUI interface; 
interface.createGUI(); 

Are you creating GUI instance?

[Paddon]

I didn't ignore his post and I did change it to an instance, but I still get the fault.

Code: Select all

// This will work
GUI interface;
interface.createGUI();

[Mikenoworth]

Have you found a solution to your problem ?? What c++ editor are you using?

[RapchikProgrammer]

if you are using namespace gui; and then declaring a variable or class with the name gui it will give some errors! And the only solution i thought of is already posted by warchief!