[RFC, patch] libitm: Filter out undo writes that overlap with the libitm stack.

[Richard Henderson]

On 01/09/2012 06:26 AM, Torvald Riegel wrote:
>     libitm: Filter out undo writes that overlap with the libitm stack.
>     
>     	libitm/
>     	* config/generic/tls.h (GTM::mask_stack_top,
>     	GTM::mask_stack_bottom): New.
>     	* local.cc (gtm_undolog::rollback): Filter out any updates that
>     	overlap the libitm stack.  Add current transaction as parameter.
>     	* libitm_i.h (GTM::gtm_undolog::rollback): Adapt.
>     	* beginend.cc (GTM::gtm_thread::rollback): Adapt.
>     	* testsuite/libitm.c/stackundo.c: New test.

One could steal code from bohem-gc for this.
See GC_get_stack_base in os_dep.c.


r~