[haiku-development] The Haiku stack end is not aligned
- From: "Ryan Leavengood" <leavengood@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Sat, 17 Nov 2007 19:30:25 -0500
Back when I was first testing JavaScriptCore on Haiku I was getting
some segfaults when the garbage collector would run. I eventually
figured out that the problem was a loop whose termination condition
was p != e. Apparently the two pointers were not aligned perfectly so
the loop would keep running, eventually hitting invalid memory.
My temporary fix was to change the loop condition to p < e. This
worked, and I even tried to send this as a patch to WebKit. But they
pointed out that this should not happen and this "fix" just hides
problems.
I turned on a DEBUG build and it turns out the pointer that is not
aligned is e, which is the stack base (which is called stack end in
Haiku.) Here is the code I use to get this:
thread_info threadInfo;
get_thread_info(find_thread(NULL), &threadInfo);
return threadInfo.stack_end;
Is there something wrong with this? Is there some reason the stack_end
is not aligned? Should I just add a byte or two to the pointer?
Thanks,
Ryan
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