On Feb 3, 2010, at 8:30 AM, McLaughlin, Michael P. wrote:
but their own. I have to pass these filled structures back to the
main
thread upon completion. The last thing each thread does is
postNotificationName to the main thread saying that it is ready to
return
lots of data which it does via an NSPointerArray
[ptr pointerArrayWithStrongObjects]
and dictionary. The object which collects the results has a function
getOpResults() which accesses the passed pointer.
My hunch is that the data is sometimes being freed/dealloced before it
gets to the main thread. Take a careful look at the memory and
refcount management in the code. (Are your data values objects or just
structs? You say they're structures, and you're using NSPointerArray,
but callijng +pointerArrayWithStrongObjects implies you're putting
objects in the array.)
Setting the environment variable MallocScribble can help catch bugs
that access freed memory. It causes free() to fill blocks with 0x55
before freeing them, which often causes a crash when something tries
to use the freed memory later on.
—Jens_______________________________________________
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