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Fixed bug of old finalized objects in the GC 

When an object aged OLD1 is finalized, it is moved from the list
'finobj' to the *beginning* of the list 'allgc'. So, this part of the
list (and not only the survival list) must be visited by 'markold'.
This commit is contained in:
Roberto Ierusalimschy 2020-07-10 14:13:50 -03:00
parent 6f5bd5072d
commit 127e7a6c89
1 changed files with 4 additions and 6 deletions
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10
lgc.c
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@ -1131,16 +1131,14 @@ static void finishgencycle (lua_State *L, global_State *g) {
/*
** Does a young collection. First, mark 'OLD1' objects. (Only survival
** and "recent old" lists can contain 'OLD1' objects. New lists cannot
** contain 'OLD1' objects, at most 'OLD0' objects that were already
** visited when marked old.) Then does the atomic step. Then,
** sweep all lists and advance pointers. Finally, finish the collection.
** Does a young collection. First, mark 'OLD1' objects. Then does the
** atomic step. Then, sweep all lists and advance pointers. Finally,
** finish the collection.
*/
static void youngcollection (lua_State *L, global_State *g) {
GCObject **psurvival; /* to point to first non-dead survival object */
lua_assert(g->gcstate == GCSpropagate);
markold(g, g->survival, g->reallyold);
markold(g, g->allgc, g->reallyold);
markold(g, g->finobj, g->finobjrold);
atomic(L);