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items in 'tobefnz' are kept black (as before recent change) and changed 

to white only when needed (being moved to 'allgc' when not keeping
invariant).
This commit is contained in:
Roberto Ierusalimschy 2010-05-03 08:55:40 -03:00
parent 85555646e3
commit d25f7f9d78
2 changed files with 15 additions and 9 deletions
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19
lgc.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lgc.c,v 2.82 2010/04/29 21:43:36 roberto Exp roberto $
** $Id: lgc.c,v 2.83 2010/04/30 18:37:14 roberto Exp roberto $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@ -265,7 +265,8 @@ static void markbeingfnz (global_State *g) {
GCObject *o;
for (o = g->tobefnz; o != NULL; o = gch(o)->next) {
lua_assert(testbit(gch(o)->marked, SEPARATED));
markobject(g, o);
makewhite(g, o);
reallymarkobject(g, o);
}
}
@ -651,12 +652,15 @@ static void checkSizes (lua_State *L) {
static Udata *udata2finalize (global_State *g) {
GCObject *o = g->tobefnz; /* get first element */
g->tobefnz = gch(o)->next; /* remove it from 'tobefnz' list */
gch(o)->next = g->allgc; /* return it to 'allgc' list */
Udata *u = rawgco2u(o);
lua_assert(isfinalized(&u->uv));
g->tobefnz = u->uv.next; /* remove it from 'tobefnz' list */
u->uv.next = g->allgc; /* return it to 'allgc' list */
g->allgc = o;
lua_assert(isfinalized(gch(o)));
resetbit(gch(o)->marked, SEPARATED); /* mark it as such */
return rawgco2u(o);
resetbit(u->uv.marked, SEPARATED); /* mark that it is not in 'tobefnz' */
if (!keepinvariant(g)) /* not keeping invariant? */
makewhite(g, o); /* "sweep" object */
return u;
}
@ -833,7 +837,6 @@ static l_mem singlestep (lua_State *L) {
return GCSWEEPMAX*GCSWEEPCOST;
}
else {
sweepwholelist(L, &g->tobefnz); /* sweep 'to-be-finalized' list */
g->sweepgc = &g->allgc; /* go to next phase */
g->gcstate = GCSsweep;
return GCSWEEPCOST;

5
ltests.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ltests.c,v 2.98 2010/04/29 21:42:33 roberto Exp roberto $
** $Id: ltests.c,v 2.99 2010/04/30 18:37:14 roberto Exp roberto $
** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
@ -412,6 +412,9 @@ int lua_checkmemory (lua_State *L) {
testbit(o->gch.marked, SEPARATED));
checkobject(g, o);
}
for (o = g->tobefnz; o != NULL; o = gch(o)->next) {
lua_assert(gch(o)->tt == LUA_TUSERDATA && isblack(o));
}
for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) {
lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
lua_assert(uv->v != &uv->u.value); /* must be open */