OpenBSD / src / QB3JvmI / Remove expensive pointer check in afree()

OpenBSD/src QB3JvmI — bin/ksh alloc.c

2017-08-15 17:57:57 UTC by jca on ⎇

HEAD

🏷

OPENBSD_6_2_BASE

   Remove expensive pointer check in afree()

   The check added in rev 1.8 walks the whole freelist to catch cases where
   an unknown pointer is passed to afree(); but it can't catch cases
   whether the struct link has been corrupted by an invalid memory write.
   And it becomes very expensive when you have lots of items in an area
   (for example with a huge HISTSIZE).

   Discussed with & ok millert@ tb@

Version	Delta		File
1.17	+2	-10	bin/ksh/alloc.c
	+2	-10	1 files

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