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more tests in 'lua_checkmemory'

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This commit is contained in:
Roberto Ierusalimschy 2010-05-06 15:16:57 -03:00
parent d2ea5b00b7
commit 8c583c61a3
1 changed files with 48 additions and 13 deletions
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61
ltests.c
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@ -1,5 +1,5 @@
/* /*
** $Id: ltests.c,v 2.100 2010/05/03 11:55:40 roberto Exp roberto $ ** $Id: ltests.c,v 2.101 2010/05/03 17:33:39 roberto Exp roberto $
** Internal Module for Debugging of the Lua Implementation ** Internal Module for Debugging of the Lua Implementation
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -361,13 +361,13 @@ static void checkobject (global_State *g, GCObject *o) {
} }
#define GRAYBIT 7 #define TESTGRAYBIT 7
static void checkgraylist (GCObject *l) { static void checkgraylist (GCObject *l) {
while (l) { while (l) {
lua_assert(isgray(l)); lua_assert(isgray(l));
lua_assert(!testbit(l->gch.marked, GRAYBIT)); lua_assert(!testbit(l->gch.marked, TESTGRAYBIT));
l->gch.marked = l_setbit(l->gch.marked, GRAYBIT); l->gch.marked = l_setbit(l->gch.marked, TESTGRAYBIT);
switch (gch(l)->tt) { switch (gch(l)->tt) {
case LUA_TTABLE: l = gco2t(l)->gclist; break; case LUA_TTABLE: l = gco2t(l)->gclist; break;
case LUA_TFUNCTION: l = gco2cl(l)->c.gclist; break; case LUA_TFUNCTION: l = gco2cl(l)->c.gclist; break;
@ -379,6 +379,10 @@ static void checkgraylist (GCObject *l) {
} }
/*
** mark all objects in gray lists with the TESTGRAYBIT, so that
** 'checkmemory' can check that all gray objects are in a gray list
*/
static void markgrays (global_State *g) { static void markgrays (global_State *g) {
if (!keepinvariant(g)) return; if (!keepinvariant(g)) return;
checkgraylist(g->gray); checkgraylist(g->gray);
@ -389,37 +393,63 @@ static void markgrays (global_State *g) {
} }
static void checkold (global_State *g, GCObject *o) {
int isold = 0;
for (; o != NULL; o = gch(o)->next) {
if (testbit(o->gch.marked, OLDBIT)) { /* old generation? */
lua_assert(g->gckind == KGC_GEN);
if (!issweepphase(g))
isold = 1;
}
else lua_assert(!isold); /* non-old object cannot be after an old one */
if (isgray(o)) {
lua_assert(!keepinvariant(g) || testbit(o->gch.marked, TESTGRAYBIT));
o->gch.marked = resetbit(o->gch.marked, TESTGRAYBIT);
}
lua_assert(!testbit(o->gch.marked, TESTGRAYBIT));
}
}
int lua_checkmemory (lua_State *L) { int lua_checkmemory (lua_State *L) {
global_State *g = G(L); global_State *g = G(L);
GCObject *o; GCObject *o;
UpVal *uv; UpVal *uv;
checkliveness(g, &g->l_registry); checkliveness(g, &g->l_registry);
checkstack(g, g->mainthread); checkstack(g, g->mainthread);
g->mainthread->marked = resetbit(g->mainthread->marked, GRAYBIT); g->mainthread->marked = resetbit(g->mainthread->marked, TESTGRAYBIT);
/* check 'allgc' list */
markgrays(g); markgrays(g);
checkold(g, g->allgc);
for (o = g->allgc; o != NULL; o = gch(o)->next) { for (o = g->allgc; o != NULL; o = gch(o)->next) {
checkobject(g, o); checkobject(g, o);
if (isgray(o)) {
lua_assert(!keepinvariant(g) || testbit(o->gch.marked, GRAYBIT));
o->gch.marked = resetbit(o->gch.marked, GRAYBIT);
}
lua_assert(!testbit(o->gch.marked, SEPARATED)); lua_assert(!testbit(o->gch.marked, SEPARATED));
lua_assert(!testbit(o->gch.marked, GRAYBIT));
} }
/* check 'udgc' list */
checkold(g, g->tobefnz);
for (o = g->udgc; o != NULL; o = gch(o)->next) { for (o = g->udgc; o != NULL; o = gch(o)->next) {
lua_assert(gch(o)->tt == LUA_TUSERDATA && lua_assert(gch(o)->tt == LUA_TUSERDATA &&
!isdead(g, o) && !isdead(g, o) &&
testbit(o->gch.marked, SEPARATED)); testbit(o->gch.marked, SEPARATED));
checkobject(g, o); checkobject(g, o);
} }
/* check 'tobefnz' list */
checkold(g, g->tobefnz);
for (o = g->tobefnz; o != NULL; o = gch(o)->next) { for (o = g->tobefnz; o != NULL; o = gch(o)->next) {
lua_assert(gch(o)->tt == LUA_TUSERDATA && isblack(o)); lua_assert(gch(o)->tt == LUA_TUSERDATA);
lua_assert(isblack(o));
lua_assert(!testbit(o->gch.marked, OLDBIT));
lua_assert(testbit(o->gch.marked, SEPARATED));
} }
/* check 'uvhead' list */
for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) { 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->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 */ lua_assert(uv->v != &uv->u.value); /* must be open */
lua_assert(!isblack(obj2gco(uv))); /* open upvalues are never black */ lua_assert(!isblack(obj2gco(uv))); /* open upvalues are never black */
checkvalref(g, obj2gco(uv), uv->v); if (isdead(g, obj2gco(uv)))
lua_assert(issweepphase(g));
else
checkvalref(g, obj2gco(uv), uv->v);
} }
return 0; return 0;
} }
@ -571,9 +601,14 @@ static int get_gccolor (lua_State *L) {
o = obj_at(L, 1); o = obj_at(L, 1);
if (!iscollectable(o)) if (!iscollectable(o))
lua_pushstring(L, "no collectable"); lua_pushstring(L, "no collectable");
else else {
lua_pushstring(L, iswhite(gcvalue(o)) ? "white" : lua_pushstring(L, iswhite(gcvalue(o)) ? "white" :
isblack(gcvalue(o)) ? "black" : "grey"); isblack(gcvalue(o)) ? "black" : "grey");
if (testbit(gcvalue(o)->gch.marked, OLDBIT)) {
lua_pushliteral(L, "/old");
lua_concat(L, 2);
}
}
return 1; return 1;
} }