Memory leak with Texture2D

I'm using Apple's Texture2D class from their CrashLanding example to draw dynamic text on the screen.

Here's my method:

    - (void) drawText:(NSString*)textToDraw atX:(float)X andY:(float)Y {

    glColor4f(0, 0, 0, 1.0);

    Texture2D* _text = [[Texture2D alloc] initWithString:textToDraw dimensions:CGSizeMake(512, 512) alignment:UITextAlignmentLeft fontName:@"Arial" fontSize:11];

    glBindTexture(GL_TEXTURE_2D, [_text name]);

    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnable(GL_TEXTURE_2D);
    glEnable(GL_BLEND);

    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    [_text drawAtPoint:CGPointMake(.5,.5)];
    [_text release];       

    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
    glDisableClientState(GL_VERTEX_ARRAY);
    glDisable(GL_TEXTURE_2D);
    glDisable(GL_BLEND);    
}

I knew since this method loops, allocating it would cause a leak, so I hoped releasing it wouldn't case an issue. However, after around 10 seconds, despite releasing the Texture, the game crashes. I can't allocate the texture in the init method because that would limit the text to be static.

I also tried modifying the Texture2D class to allow dynamic text, but couldn't succeed.

Update: Crash report from the iPhone simulator

Process:         Game [31087]
Path:            /Users/robertfratto/Library/Application Support/iPhone Simulator/4.2/Applications/3AF59DDA-79AC-412D-A968-C80DABEC7B19/Game.app/Game
Identifier:      Game
Version:         ??? (???)
Code Type:       X86 (Native)
Parent Process:  ??? [31088]

Date/Time:       2011-01-10 01:06:45.059 -0500
OS Version:      Mac OS X 10.6.6 (10J567)
Report Version:  6

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000000
Crashed Thread:  4

Application Specific Information:
iPhone Simulator 23开发者_StackOverflow中文版5, iPhone OS 4.2 (iPhone (Retina)/8C134)

Thread 0:  Dispatch queue: com.apple.main-thread
0   dyld                            0x8fe12fae ImageLoaderMachOClassic::prefetchLINKEDIT(ImageLoader::LinkContext const&) + 124
1   dyld                            0x8fe1316a ImageLoaderMachOClassic::rebase(ImageLoader::LinkContext const&) + 82
2   dyld                            0x8fe104d4 ImageLoaderMachO::doRebase(ImageLoader::LinkContext const&) + 286
3   dyld                            0x8fe0cdb1 ImageLoader::recursiveRebase(ImageLoader::LinkContext const&) + 91
4   dyld                            0x8fe0de70 ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&) + 158
5   dyld                            0x8fe056af dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&) + 137
6   dyld                            0x8fe0b242 dlopen + 471
7   libSystem.B.dylib               0x95fce8a8 dlopen + 66
8   com.apple.CoreGraphics          0x00ae3e71 load_function + 619
9   com.apple.CoreGraphics          0x00ae4016 CGLibraryLoadFunction + 193
10  com.apple.CoreGraphics          0x00b4501e load_library + 38
11  com.apple.CoreGraphics          0x00b450f5 load_vtable + 162
12  libSystem.B.dylib               0x95fe6900 pthread_once + 82
13  com.apple.CoreGraphics          0x00b44fec CGFontGetVTable + 37
14  com.apple.CoreGraphics          0x00ada052 CGFontFinderGetDefault + 28
15  com.apple.CoreGraphics          0x00b11c99 CGFontCreateWithFontName + 63
16  com.apple.CoreGraphics          0x00b11de6 CGFontCreateWithName + 57
17  GraphicsServices                0x011b9d3c GSFontCreateWithName + 494
18  UIKit                           0x0019fa7b UINewFont + 100
19  UIKit                           0x0019faa7 +[UIFont systemFontOfSize:traits:] + 33
20  UIKit                           0x0019ee00 +[UIFont systemFontOfSize:] + 49
21  UIKit                           0x0015a537 +[UILabel defaultFont] + 45
22  UIKit                           0x0015ccc3 -[UILabel _commonInit] + 96
23  UIKit                           0x0015ab0b -[UILabel initWithFrame:] + 98
24  Game                            0x00002921 -[EAGLView initWithCoder:] + 264 (EAGLView.m:37)
25  UIKit                           0x00232265 -[UIClassSwapper initWithCoder:] + 237
26  Foundation                      0x00790c7c _decodeObjectBinary + 3296
27  Foundation                      0x00791a4d -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1354
28  Foundation                      0x0079207c -[NSArray(NSArray) initWithCoder:] + 596
29  Foundation                      0x00790c7c _decodeObjectBinary + 3296
30  Foundation                      0x0078fde9 _decodeObject + 224
31  UIKit                           0x00072c5f -[UIView initWithCoder:] + 642
32  UIKit                           0x0005f709 -[UIWindow initWithCoder:] + 89
33  Foundation                      0x00790c7c _decodeObjectBinary + 3296
34  Foundation                      0x0078fde9 _decodeObject + 224
35  UIKit                           0x00231f43 -[UIRuntimeConnection initWithCoder:] + 212
36  Foundation                      0x00790c7c _decodeObjectBinary + 3296
37  Foundation                      0x00791a4d -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1354
38  Foundation                      0x0079207c -[NSArray(NSArray) initWithCoder:] + 596
39  Foundation                      0x00790c7c _decodeObjectBinary + 3296
40  Foundation                      0x0078fde9 _decodeObject + 224
41  UIKit                           0x00231200 -[UINib instantiateWithOwner:options:] + 804
42  UIKit                           0x00233081 -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:] + 168
43  UIKit                           0x0003d943 -[UIApplication _loadMainNibFile] + 172
44  UIKit                           0x0003e4ca -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 291
45  UIKit                           0x00048db2 -[UIApplication handleEvent:withNewEvent:] + 1533
46  UIKit                           0x00041202 -[UIApplication sendEvent:] + 71
47  UIKit                           0x00046732 _UIApplicationHandleEvent + 7576
48  GraphicsServices                0x011bca36 PurpleEventCallback + 1550
49  CoreFoundation                  0x00f29064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
50  CoreFoundation                  0x00e896f7 __CFRunLoopDoSource1 + 215
51  CoreFoundation                  0x00e86983 __CFRunLoopRun + 979
52  CoreFoundation                  0x00e86240 CFRunLoopRunSpecific + 208
53  CoreFoundation                  0x00e86161 CFRunLoopRunInMode + 97
54  UIKit                           0x0003dfa8 -[UIApplication _run] + 636
55  UIKit                           0x0004a42e UIApplicationMain + 1160
56  Game                            0x00002510 main + 102 (main.m:13)
57  Game                            0x000024a1 start + 53

Thread 1:  Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib               0x95fee982 kevent + 10
1   libSystem.B.dylib               0x95fef09c _dispatch_mgr_invoke + 215
2   libSystem.B.dylib               0x95fee559 _dispatch_queue_invoke + 163
3   libSystem.B.dylib               0x95fee2fe _dispatch_worker_thread2 + 240
4   libSystem.B.dylib               0x95fedd81 _pthread_wqthread + 390
5   libSystem.B.dylib               0x95fedbc6 start_wqthread + 30

Thread 2:
0   libSystem.B.dylib               0x95feda12 __workq_kernreturn + 10
1   libSystem.B.dylib               0x95fedfa8 _pthread_wqthread + 941
2   libSystem.B.dylib               0x95fedbc6 start_wqthread + 30

Thread 3:  WebThread
0   libSystem.B.dylib               0x95fc80fa mach_msg_trap + 10
1   libSystem.B.dylib               0x95fc8867 mach_msg + 68
2   CoreFoundation                  0x00f294a6 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x00e86874 __CFRunLoopRun + 708
4   CoreFoundation                  0x00e86240 CFRunLoopRunSpecific + 208
5   CoreFoundation                  0x00e86161 CFRunLoopRunInMode + 97
6   WebCore                         0x01e4f423 RunWebThread(void*) + 499
7   libSystem.B.dylib               0x95ff585d _pthread_start + 345
8   libSystem.B.dylib               0x95ff56e2 thread_start + 34

Thread 4 Crashed:

Thread 4 crashed with X86 Thread State (32-bit):
  eax: 0x00000000  ebx: 0x00000000  ecx: 0x00000000  edx: 0x00000000
  edi: 0x00000000  esi: 0x00000000  ebp: 0x00000000  esp: 0x00000000
   ss: 0x0000001f  efl: 0x00010202  eip: 0x00000000   cs: 0x00000017
   ds: 0x0000001f   es: 0x0000001f   fs: 0x0000001f   gs: 0x0000001f
  cr2: 0x00000000

Binary Images:
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0x93691000 - 0x93691ff7  com.apple.Accelerate 1.6 (Accelerate 1.6) <BC501C9F-7C20-961A-B135-0A457667D03C> /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate
0x937da000 - 0x937e6ff7  libkxld.dylib ??? (???) <F0E915AD-6B32-0D5E-D24B-B188447FDD23> /usr/lib/system/libkxld.dylib
0x93d7f000 - 0x93deeff7  libvMisc.dylib 268.0.1 (compatibility 1.0.0) <2FC2178F-FEF9-6E3F-3289-A6307B1A154C> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvMisc.dylib
0x94a6c000 - 0x94a6ffe7  libmathCommon.A.dylib 315.0.0 (compatibility 1.0.0) <1622A54F-1A98-2CBE-B6A4-2122981A500E> /usr/lib/system/libmathCommon.A.dylib
0x94e5b000 - 0x94f4fff7  libiconv.2.dylib 7.0.0 (compatibility 7.0.0) <9EC28185-D26F-533F-90C4-FBAA13A15947> /usr/lib/libiconv.2.dylib
0x94f50000 - 0x94fadff7  com.apple.framework.IOKit 2.0 (???) <A769737F-E0D6-FB06-29B4-915CF4F43420> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x95d23000 - 0x95d23ff7  com.apple.vecLib 3.6 (vecLib 3.6) <7362077A-890F-3AEF-A8AB-22247B10E106> /System/Library/Frameworks/vecLib.framework/Versions/A/vecLib
0x95fc7000 - 0x9616eff7  libSystem.B.dylib 125.2.1 (compatibility 1.0.0) <62291026-D016-705D-DC1E-FC2B09D47DE5> /usr/lib/libSystem.B.dylib
0x97153000 - 0x97195ff7  libvDSP.dylib 268.0.1 (compatibility 1.0.0) <3F0ED200-741B-4E27-B89F-634B131F5E9E> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libvDSP.dylib
0x97997000 - 0x97a74ff7  com.apple.vImage 4.0 (4.0) <64597E4B-F144-DBB3-F428-0EC3D9A1219E> /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vImage.framework/Versions/A/vImage
0x97e4c000 - 0x97e60fe7  libbsm.0.dylib ??? (???) <14CB053A-7C47-96DA-E415-0906BA1B78C9> /usr/lib/libbsm.0.dylib
0xffff0000 - 0xffff1fff  libSystem.B.dylib ??? (???) <62291026-D016-705D-DC1E-FC2B09D47DE5> /usr/lib/libSystem.B.dylib

You have to write

Texture2D* _text = [[Texture2D alloc] initWithString:textToDraw dimensions:CGSizeMake(512, 512) alignment:UITextAlignmentLeft fontName:@"Arial" fontSize:11];

instead of Texture2D* _text = [[[Texture2D alloc] initWithString:textToDraw dimensions:CGSizeMake(512, 512) alignment:UITextAlignmentLeft fontName:@"Arial" fontSize:11] autorelease];

It may be helpful for you.

I'm not sure why, but it's crashing because of the (NSString*)theString argument. For now, although it's inconvenient, if a global variable is set to be displayed instead of a string defined through an argument, the game doesn't crash.

So if I create a separate drawText method for each string I'd like to draw, it will work.