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small bug: generational mode is always in 'propagate' mode only

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outside the collector: during collection of course it must go to
other modes.
This commit is contained in:
Roberto Ierusalimschy
2012-09-11 09:53:08 -03:00
parent 2038073975
commit ae1d318822
2 changed files with 21 additions and 10 deletions
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19
lgc.h
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@@ -1,5 +1,5 @@
/*
** $Id: lgc.h,v 2.56 2012/05/23 15:43:14 roberto Exp roberto $
** $Id: lgc.h,v 2.57 2012/07/04 15:52:38 roberto Exp roberto $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@@ -50,15 +50,24 @@
#define isgenerational(g) ((g)->gckind == KGC_GEN)
/*
** macro to tell when main invariant (white objects cannot point to black
** macros to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a non-generational collection, the sweep
** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and
** all objects are white again. During a generational collection, the
** invariant must be kept all times. (The state in generational mode
** is kept in 'propagate', so 'keepinvariant' is always true.)
** invariant must be kept all times.
*/
#define keepinvariant(g) (g->gcstate <= GCSatomic)
#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic)
/*
** Outside the collector, the state in generational mode is kept in
** 'propagate', so 'keepinvariant' is always true.
*/
#define keepinvariantout(g) \
check_exp(g->gcstate == GCSpropagate || !isgenerational(g), \
g->gcstate <= GCSatomic)
/*