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No more field 'lua_State.stacksize'

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The stack size is derived from 'stack_last', when needed. Moreover,
the handling of stack sizes is more consistent, always excluding the
extra space except when allocating/deallocating the array.
This commit is contained in:
Roberto Ierusalimschy
2020-10-06 15:50:24 -03:00
parent 9ecd446141
commit 5aa36e894f
6 changed files with 29 additions and 26 deletions
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5
lgc.c
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@@ -633,8 +633,7 @@ static int traversethread (global_State *g, lua_State *th) {
for (uv = th->openupval; uv != NULL; uv = uv->u.open.next)
markobject(g, uv); /* open upvalues cannot be collected */
if (g->gcstate == GCSatomic) { /* final traversal? */
StkId lim = th->stack + th->stacksize; /* real end of stack */
for (; o < lim; o++) /* clear not-marked stack slice */
for (; o < th->stack_last; o++) /* clear not-marked stack slice */
setnilvalue(s2v(o));
/* 'remarkupvals' may have removed thread from 'twups' list */
if (!isintwups(th) && th->openupval != NULL) {
@@ -644,7 +643,7 @@ static int traversethread (global_State *g, lua_State *th) {
}
else if (!g->gcemergency)
luaD_shrinkstack(th); /* do not change stack in emergency cycle */
return 1 + th->stacksize;
return 1 + stacksize(th);
}