On Fri, 2002-09-20 at 16:53, Zach Brown wrote:
> A friend recently was bitten by passing a list_head from list_for_each
> to a code path that later moved the list_head around. Does the attached
> patch re-create some debugging wheel that's hiding off in a corner
> somewhere?
>
> Beyond catching the obvious use of uninitialized things, it also seems
> to catch double adds, double deletes, and simple deletes of 'pos' in
> list_for_each. it even seems to bark about the seemingly hard-to-detect
> movement of 'pos' from the iterating list to another, but probably only
> in the rare case where you're unconditionally moving all 'pos' in the
> loop body. (you eventually iterate into the second list's head and try
> to add it to itself)
Hey, cool!
Yes, I think a lot of people would be all for something like this as a
CONFIG_DEBUG_LISTS or such. Very nice.
Robert Love
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This archive was generated by hypermail 2b29 : Mon Sep 23 2002 - 22:00:32 EST