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ptr=malloc(24) : Unhandled exception

Started by m4gnus Jan 30, 2006 at 1:53 PM 3 replies 950+ views

Original Post

Jan 30, 2006 at 1:53 PM

My problem is as simple as annoying: I'm just trying to reserve a special amount of memory(the size is defined by some flags) using ptr=malloc(size) and it worked fine for now but now i tried some different flags so that i get a size of 24 but when i call ptr=malloc(size) (with size=24) i get an unhandled exception in 0x0000003c. How can this be possible? sadly i cannot show you the address the pointer is pointing to because the debugger refuses to tell but i think that shouldn't matter anyway. regards, m4gnus

255

Jan 30, 2006 at 1:57 PM

This is probably the result of a memory access error or stack corruption somewhere earlier in your program. Run your program through a memory debugger if you can.

m4gnus

Author

m4gnus

Jan 30, 2006 at 2:12 PM

Quote:
Run your program through a memory debugger if you can.

if you tell me what exactly a memory debugger does and if Visual .net 2003 has one i probably can.

How can memory access errors or a stack corruption be caused? i can isolate the problem quite fast but if i don't know what i'm searching for it could quite a long time to fix the problem.

regards,
m4gnus

DrEvil

155

DrEvil

Jan 30, 2006 at 2:24 PM

Usually from overwriting an array. So check any array manipulations, check any memcpy, memset, etc..

m4gnus

Author

m4gnus

Jan 31, 2006 at 8:59 AM

ok fixed the problem. i used the [5] operator of a std::vector without putting any elements in it.

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