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Bug 890

Summary: Application crash on SDL_Init under OSX 10.6
Product: SDL Reporter: Nicholas Phillips <eudoxus>
Component: *don't know*Assignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: critical    
Priority: P2    
Version: HG 2.0   
Hardware: x86_64   
OS: Mac OS X 10.6   

Description Nicholas Phillips 2009-11-21 18:01:11 UTC 
Using OSX 10.6 on a new MacBook Pro, I just updated SDL 1.3 to the latest SVN revision (5303), and my applications now crash when calling SDL_Init.

My code worked fine in the previous SVN version of SDL 1.3.

Crash info:

Upon calling 

SDL_Init(SDL_INIT_VIDEO);

application crashes with:

"
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000008
0x00000001000d7119 in Cocoa_InitMouse (_this=<value temporarily unavailable, due to optimizations>) at ./src/video/cocoa/SDL_cocoamouse.m:35
35	    data->mouse = SDL_AddMouse(&mouse, "Mouse", 0, 0, 1);
"

Let me know if I can provide any more info that would help. 

I will see if I can figure anything out on my end.
Comment 1 Nicholas Phillips 2009-11-22 12:27:30 UTC 
Alright, this seems like a simple error. I found that at SDL_cocoamouse.m:35, data has the value 0x0. So it seems that _this->driverdata is never set. Setting data to the the appropriate memory address as allocated in Cocoa_CreateDevice(...) allows the program to run normally:

Breakpoint 1, Cocoa_CreateDevice (devindex=<value temporarily unavailable, due to optimizations>) at src/video/cocoa/SDL_cocoavideo.m:67
67	    device->driverdata = data;

(gdb) step
70	    Gestalt(gestaltSystemVersion, &data->osversion);

(gdb) print device->driverdata
$3 = (void *) 0x102013c20

(gdb) break SDL_cocoamouse.m:35
Breakpoint 2 at 0x1000d7100: file src/video/cocoa/SDL_cocoamouse.m, line 35.

(gdb) continue
Continuing.

Breakpoint 2, Cocoa_InitMouse (_this=<value temporarily unavailable, due to optimizations>) at src/video/cocoa/SDL_cocoamouse.m:35
35	    data->mouse = SDL_AddMouse(&mouse, "Mouse", 0, 0, 1);

(gdb) set data=0x102013c20

(gdb) continue


... At this point my application runs normally.
Comment 2 Nicholas Phillips 2009-11-22 12:51:27 UTC 
This issue has been addressed in SVN revision 5308.

Marking bug as fixed.