Memory Leaks with blank project [C++]

[dragon.star]

Greetings,

I've created a new blank project in the LE editor and loaded the solution in VS.

Without modifying anything (leaving the default interpreter code intact), i get the following in the log when the app exits.

 

Detected memory leaks!
Dumping objects ->
{188} normal block at 0x070461A8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{187} normal block at 0x07042178, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{186} normal block at 0x0703E148, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{184} normal block at 0x0703A118, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{183} normal block at 0x070360E8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{182} normal block at 0x070320B8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{181} normal block at 0x0702A008, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{180} normal block at 0x07019F58, 65664 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{179} normal block at 0x07011EA8, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{178} normal block at 0x07009DF8, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{177} normal block at 0x07001D48, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{176} normal block at 0x06FF9B18, 33280 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{175} normal block at 0x06FE1AA8, 98368 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{169} normal block at 0x06F39B58, 8 bytes long.
 Data: <     { V> 18 1E FD 06 80 7B 0E 56 
{163} normal block at 0x06F39228, 8 bytes long.
 Data: <$    { V> 24 1D FD 06 80 7B 0E 56 
{162} normal block at 0x06FD1C60, 2720 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{161} normal block at 0x06FD1AE0, 336 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{159} normal block at 0x03EEE500, 760 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{145} normal block at 0x03E49590, 1144 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{144} normal block at 0x03E27D90, 528 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{127} normal block at 0x06070338, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{126} normal block at 0x0606C308, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{125} normal block at 0x060682D8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{124} normal block at 0x060642A8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{118} normal block at 0x06060278, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{117} normal block at 0x03EE8BD0, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{116} normal block at 0x03E445E0, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{115} normal block at 0x060581C8, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{114} normal block at 0x06048118, 65664 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{113} normal block at 0x06040068, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{112} normal block at 0x03EE0B20, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{111} normal block at 0x03ED8A70, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{110} normal block at 0x03ED0840, 33280 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{109} normal block at 0x03EB87D0, 98368 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{103} normal block at 0x03D60D08, 8 bytes long.
 Data: <  O  { V> D8 90 4F 01 80 7B 0E 56 
{97} normal block at 0x03D602C0, 8 bytes long.
 Data: <  O  { V> E4 8F 4F 01 80 7B 0E 56 
{96} normal block at 0x014F8F38, 2720 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{94} normal block at 0x0150E408, 336 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
Object dump complete.

 

 

I also removed all the interpreter code in App::Start and Loop and created a window, world, and a context and they are released in the App destructor.

#include "App.h"

using namespace Leadwerks;

App::App() : window(NULL), context(NULL), world(NULL), camera(NULL) {}

App::~App()
{ 
	context->Release();

	delete world;
	delete window; 
}

bool App::Start()
{
	window = Leadwerks::Window::Create("3D Window", 120, 70, 1280, 720, Window::Titlebar);
	context = Context::Create(window);
	world = World::Create();



	return true;
}

bool App::Loop()
{
	if (window->KeyDown(Key::Escape) || window->Closed())
		return false;

	return true;
}

 

The log still reports leaks but with different blocks and sizes:

 

Detected memory leaks!
Dumping objects ->
{159} normal block at 0x04E1D8E8, 760 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{145} normal block at 0x04D53978, 1144 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{144} normal block at 0x063A5998, 528 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{127} normal block at 0x0639C1A8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{126} normal block at 0x06398178, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{125} normal block at 0x06394148, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{124} normal block at 0x06390118, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{118} normal block at 0x04E17248, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{117} normal block at 0x04E13218, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{116} normal block at 0x04E0F1E8, 16384 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{115} normal block at 0x04E07138, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{114} normal block at 0x06380068, 65664 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{113} normal block at 0x04DFF088, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{112} normal block at 0x04DF6FD8, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{111} normal block at 0x04DEEF28, 32896 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{110} normal block at 0x04DE6CF8, 33280 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{109} normal block at 0x04DCEC88, 98368 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{103} normal block at 0x04D60070, 8 bytes long.
 Data: <     {!V> D8 D8 D2 04 80 7B 21 56 
{97} normal block at 0x04D5FEE8, 8 bytes long.
 Data: <     {!V> E4 D7 D2 04 80 7B 21 56 
{96} normal block at 0x04D2D730, 2720 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
{94} normal block at 0x04C916F8, 336 bytes long.
 Data: <cccccccccccccccc> 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 63 
Object dump complete.

I'm just wondering if they are real leaks or a false flag, any thoughts?

 

Thanks!

[Ma-Shell]

The lua interpreter does a lot of memory allocating and deallocating, causing these false positives to show up.

See more here: 

 

[dragon.star]

Good to know, thank you!

[Josh]

If it's only occurring at exit it's not really a leak. Some programmers like to manually free all resources when a program ends, which seems like a huge waste of time to me since the OS deletes it all anyways.