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Upgrade 5.2.1 to 5.2.2.

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Bugs fixed: http://www.lua.org/bugs.html
This commit is contained in:
batrick
2013-05-02 14:59:06 +00:00
parent 371be36f88
commit 1720606226
32 changed files with 409 additions and 317 deletions
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90
liblua/lgc.c
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@@ -1,5 +1,5 @@
/*
** $Id: lgc.c,v 2.133 2012/05/31 21:28:59 roberto Exp $
** $Id: lgc.c,v 2.140 2013/03/16 21:10:18 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@@ -43,21 +43,12 @@
*/
#define STEPMULADJ 200
/*
** macro to adjust 'pause': 'pause' is actually used like
** 'pause / PAUSEADJ' (value chosen by tests)
*/
#define PAUSEADJ 200
/*
** standard negative debt for GC; a reasonable "time" to wait before
** starting a new cycle
*/
#define stddebtest(g,e) (-cast(l_mem, (e)/PAUSEADJ) * g->gcpause)
#define stddebt(g) stddebtest(g, gettotalbytes(g))
#define PAUSEADJ 100
/*
@@ -144,9 +135,9 @@ static int iscleared (global_State *g, const TValue *o) {
void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v) {
global_State *g = G(L);
lua_assert(isblack(o) && iswhite(v) && !isdead(g, v) && !isdead(g, o));
lua_assert(isgenerational(g) || g->gcstate != GCSpause);
lua_assert(g->gcstate != GCSpause);
lua_assert(gch(o)->tt != LUA_TTABLE);
if (keepinvariant(g)) /* must keep invariant? */
if (keepinvariantout(g)) /* must keep invariant? */
reallymarkobject(g, v); /* restore invariant */
else { /* sweep phase */
lua_assert(issweepphase(g));
@@ -343,7 +334,7 @@ static void remarkupvals (global_State *g) {
** mark root set and reset all gray lists, to start a new
** incremental (or full) collection
*/
static void markroot (global_State *g) {
static void restartcollection (global_State *g) {
g->gray = g->grayagain = NULL;
g->weak = g->allweak = g->ephemeron = NULL;
markobject(g, g->mainthread);
@@ -459,7 +450,7 @@ static lu_mem traversetable (global_State *g, Table *h) {
else /* not weak */
traversestrongtable(g, h);
return sizeof(Table) + sizeof(TValue) * h->sizearray +
sizeof(Node) * sizenode(h);
sizeof(Node) * cast(size_t, sizenode(h));
}
@@ -796,7 +787,7 @@ static GCObject *udata2finalize (global_State *g) {
g->allgc = o;
resetbit(gch(o)->marked, SEPARATED); /* mark that it is not in 'tobefnz' */
lua_assert(!isold(o)); /* see MOVE OLD rule */
if (!keepinvariant(g)) /* not keeping invariant? */
if (!keepinvariantout(g)) /* not keeping invariant? */
makewhite(g, o); /* "sweep" object */
return o;
}
@@ -855,7 +846,7 @@ static void separatetobefnz (lua_State *L, int all) {
while ((curr = *p) != NULL) { /* traverse all finalizable objects */
lua_assert(!isfinalized(curr));
lua_assert(testbit(gch(curr)->marked, SEPARATED));
if (!(all || iswhite(curr))) /* not being collected? */
if (!(iswhite(curr) || all)) /* not being collected? */
p = &gch(curr)->next; /* don't bother with it */
else {
l_setbit(gch(curr)->marked, FINALIZEDBIT); /* won't be finalized again */
@@ -891,7 +882,7 @@ void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) {
ho->next = g->finobj; /* link it in list 'finobj' */
g->finobj = o;
l_setbit(ho->marked, SEPARATED); /* mark it as such */
if (!keepinvariant(g)) /* not keeping invariant? */
if (!keepinvariantout(g)) /* not keeping invariant? */
makewhite(g, o); /* "sweep" object */
else
resetoldbit(o); /* see MOVE OLD rule */
@@ -908,6 +899,21 @@ void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) {
*/
/*
** set a reasonable "time" to wait before starting a new GC cycle;
** cycle will start when memory use hits threshold
*/
static void setpause (global_State *g, l_mem estimate) {
l_mem debt, threshold;
estimate = estimate / PAUSEADJ; /* adjust 'estimate' */
threshold = (g->gcpause < MAX_LMEM / estimate) /* overflow? */
? estimate * g->gcpause /* no overflow */
: MAX_LMEM; /* overflow; truncate to maximum */
debt = -cast(l_mem, threshold - gettotalbytes(g));
luaE_setdebt(g, debt);
}
#define sweepphases \
(bitmask(GCSsweepstring) | bitmask(GCSsweepudata) | bitmask(GCSsweep))
@@ -918,7 +924,7 @@ void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) {
** object inside the list (instead of to the header), so that the real
** sweep do not need to skip objects created between "now" and the start
** of the real sweep.
** Returns how many objects it sweeped.
** Returns how many objects it swept.
*/
static int entersweep (lua_State *L) {
global_State *g = G(L);
@@ -985,7 +991,7 @@ void luaC_freeallobjects (lua_State *L) {
static l_mem atomic (lua_State *L) {
global_State *g = G(L);
l_mem work = -g->GCmemtrav; /* start counting work */
l_mem work = -cast(l_mem, g->GCmemtrav); /* start counting work */
GCObject *origweak, *origall;
lua_assert(!iswhite(obj2gco(g->mainthread)));
markobject(g, L); /* mark running thread */
@@ -1028,12 +1034,10 @@ static lu_mem singlestep (lua_State *L) {
global_State *g = G(L);
switch (g->gcstate) {
case GCSpause: {
g->GCmemtrav = 0; /* start to count memory traversed */
if (!isgenerational(g))
markroot(g); /* start a new collection */
/* in any case, root must be marked at this point */
lua_assert(!iswhite(obj2gco(g->mainthread))
&& !iswhite(gcvalue(&g->l_registry)));
/* start to count memory traversed */
g->GCmemtrav = g->strt.size * sizeof(GCObject*);
lua_assert(!isgenerational(g));
restartcollection(g);
g->gcstate = GCSpropagate;
return g->GCmemtrav;
}
@@ -1105,18 +1109,23 @@ void luaC_runtilstate (lua_State *L, int statesmask) {
static void generationalcollection (lua_State *L) {
global_State *g = G(L);
lua_assert(g->gcstate == GCSpropagate);
if (g->GCestimate == 0) { /* signal for another major collection? */
luaC_fullgc(L, 0); /* perform a full regular collection */
g->GCestimate = gettotalbytes(g); /* update control */
}
else {
lu_mem estimate = g->GCestimate;
luaC_runtilstate(L, ~bitmask(GCSpause)); /* run complete cycle */
luaC_runtilstate(L, bitmask(GCSpause));
luaC_runtilstate(L, bitmask(GCSpause)); /* run complete (minor) cycle */
g->gcstate = GCSpropagate; /* skip restart */
if (gettotalbytes(g) > (estimate / 100) * g->gcmajorinc)
g->GCestimate = 0; /* signal for a major collection */
else
g->GCestimate = estimate; /* keep estimate from last major coll. */
}
luaE_setdebt(g, stddebt(g));
setpause(g, gettotalbytes(g));
lua_assert(g->gcstate == GCSpropagate);
}
@@ -1124,7 +1133,7 @@ static void incstep (lua_State *L) {
global_State *g = G(L);
l_mem debt = g->GCdebt;
int stepmul = g->gcstepmul;
if (stepmul < 40) stepmul = 40; /* avoid ridiculous low values */
if (stepmul < 40) stepmul = 40; /* avoid ridiculous low values (and 0) */
/* convert debt from Kb to 'work units' (avoid zero debt and overflows) */
debt = (debt / STEPMULADJ) + 1;
debt = (debt < MAX_LMEM / stepmul) ? debt * stepmul : MAX_LMEM;
@@ -1133,10 +1142,11 @@ static void incstep (lua_State *L) {
debt -= work;
} while (debt > -GCSTEPSIZE && g->gcstate != GCSpause);
if (g->gcstate == GCSpause)
debt = stddebtest(g, g->GCestimate); /* pause until next cycle */
else
setpause(g, g->GCestimate); /* pause until next cycle */
else {
debt = (debt / stepmul) * STEPMULADJ; /* convert 'work units' to Kb */
luaE_setdebt(g, debt);
luaE_setdebt(g, debt);
}
}
@@ -1172,7 +1182,6 @@ void luaC_step (lua_State *L) {
void luaC_fullgc (lua_State *L, int isemergency) {
global_State *g = G(L);
int origkind = g->gckind;
int someblack = keepinvariant(g);
lua_assert(origkind != KGC_EMERGENCY);
if (isemergency) /* do not run finalizers during emergency GC */
g->gckind = KGC_EMERGENCY;
@@ -1180,22 +1189,21 @@ void luaC_fullgc (lua_State *L, int isemergency) {
g->gckind = KGC_NORMAL;
callallpendingfinalizers(L, 1);
}
if (someblack) { /* may there be some black objects? */
if (keepinvariant(g)) { /* may there be some black objects? */
/* must sweep all objects to turn them back to white
(as white has not changed, nothing will be collected) */
entersweep(L);
}
/* finish any pending sweep phase to start a new cycle */
luaC_runtilstate(L, bitmask(GCSpause));
/* run entire collector */
luaC_runtilstate(L, ~bitmask(GCSpause));
luaC_runtilstate(L, bitmask(GCSpause));
luaC_runtilstate(L, ~bitmask(GCSpause)); /* start new collection */
luaC_runtilstate(L, bitmask(GCSpause)); /* run entire collection */
if (origkind == KGC_GEN) { /* generational mode? */
/* generational mode must always start in propagate phase */
/* generational mode must be kept in propagate phase */
luaC_runtilstate(L, bitmask(GCSpropagate));
}
g->gckind = origkind;
luaE_setdebt(g, stddebt(g));
setpause(g, gettotalbytes(g));
if (!isemergency) /* do not run finalizers during emergency GC */
callallpendingfinalizers(L, 1);
}