'objsize' returns 'l_mem'

Sums of size_t may not fit in a size_t.

lfunc.c

@@ -264,16 +264,16 @@ Proto *luaF_newproto (lua_State *L) {
 }
 
 
-size_t luaF_protosize (Proto *p) {
-  size_t sz = sizeof(Proto)
+lu_mem luaF_protosize (Proto *p) {
+  lu_mem sz = cast(lu_mem, sizeof(Proto))
             + cast_uint(p->sizep) * sizeof(Proto*)
             + cast_uint(p->sizek) * sizeof(TValue)
             + cast_uint(p->sizelocvars) * sizeof(LocVar)
             + cast_uint(p->sizeupvalues) * sizeof(Upvaldesc);
   if (!(p->flag & PF_FIXED)) {
-    sz +=  cast_uint(p->sizecode) * sizeof(Instruction)
-        +  cast_uint(p->sizelineinfo) * sizeof(lu_byte)
-        + cast_uint(p->sizeabslineinfo) * sizeof(AbsLineInfo);
+    sz += cast_uint(p->sizecode) * sizeof(Instruction);
+    sz += cast_uint(p->sizelineinfo) * sizeof(lu_byte);
+    sz += cast_uint(p->sizeabslineinfo) * sizeof(AbsLineInfo);
   }
   return sz;
 }

lfunc.h

@@ -56,7 +56,7 @@ LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
 LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
 LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy);
 LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
-LUAI_FUNC size_t luaF_protosize (Proto *p);
+LUAI_FUNC lu_mem luaF_protosize (Proto *p);
 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
                                          int pc);

lgc.c

@@ -110,43 +110,54 @@ static void entersweep (lua_State *L);
 #define gnodelast(h)	gnode(h, cast_sizet(sizenode(h)))
 
 
-static size_t objsize (GCObject *o) {
+static l_mem objsize (GCObject *o) {
+  lu_mem res;
   switch (o->tt) {
     case LUA_VTABLE: {
-      return luaH_size(gco2t(o));
+      res = luaH_size(gco2t(o));
+      break;
     }
     case LUA_VLCL: {
       LClosure *cl = gco2lcl(o);
-      return sizeLclosure(cl->nupvalues);
+      res = sizeLclosure(cl->nupvalues);
+      break;
     }
     case LUA_VCCL: {
       CClosure *cl = gco2ccl(o);
-      return sizeCclosure(cl->nupvalues);
+      res = sizeCclosure(cl->nupvalues);
+      break;
       break;
     }
     case LUA_VUSERDATA: {
       Udata *u = gco2u(o);
-      return sizeudata(u->nuvalue, u->len);
+      res = sizeudata(u->nuvalue, u->len);
+      break;
     }
     case LUA_VPROTO: {
-      return luaF_protosize(gco2p(o));
+      res = luaF_protosize(gco2p(o));
+      break;
     }
     case LUA_VTHREAD: {
-      return luaE_threadsize(gco2th(o));
+      res = luaE_threadsize(gco2th(o));
+      break;
     }
     case LUA_VSHRSTR: {
       TString *ts = gco2ts(o);
-      return sizestrshr(cast_uint(ts->shrlen));
+      res = sizestrshr(cast_uint(ts->shrlen));
+      break;
     }
     case LUA_VLNGSTR: {
       TString *ts = gco2ts(o);
-      return luaS_sizelngstr(ts->u.lnglen, ts->shrlen);
+      res = luaS_sizelngstr(ts->u.lnglen, ts->shrlen);
+      break;
     }
     case LUA_VUPVAL: {
-      return sizeof(UpVal);
+      res = sizeof(UpVal);
+      break;
     }
-    default: lua_assert(0); return 0;
+    default: res = 0; lua_assert(0);
   }
+  return cast(l_mem, res);
 }
 
 
@@ -327,7 +338,7 @@ GCObject *luaC_newobj (lua_State *L, lu_byte tt, size_t sz) {
 ** (only closures can), and a userdata's metatable must be a table.
 */
 static void reallymarkobject (global_State *g, GCObject *o) {
-  g->GCmarked += cast(l_mem, objsize(o));
+  g->GCmarked += objsize(o);
   switch (o->tt) {
     case LUA_VSHRSTR:
     case LUA_VLNGSTR: {
@@ -803,6 +814,7 @@ static void freeupval (lua_State *L, UpVal *uv) {
 
 
 static void freeobj (lua_State *L, GCObject *o) {
+  assert_code(l_mem newmem = gettotalbytes(G(L)) - objsize(o));
   switch (o->tt) {
     case LUA_VPROTO:
       luaF_freeproto(L, gco2p(o));
@@ -846,6 +858,7 @@ static void freeobj (lua_State *L, GCObject *o) {
     }
     default: lua_assert(0);
   }
+  lua_assert(gettotalbytes(G(L)) == newmem);
 }
 
 
@@ -1167,7 +1180,7 @@ static GCObject **sweepgen (lua_State *L, global_State *g, GCObject **p,
         lua_assert(age != G_OLD1);  /* advanced in 'markold' */
         setage(curr, nextage[age]);
         if (getage(curr) == G_OLD1) {
-          addedold += cast(l_mem, objsize(curr));  /* bytes becoming old */
+          addedold += objsize(curr);  /* bytes becoming old */
           if (*pfirstold1 == NULL)
             *pfirstold1 = curr;  /* first OLD1 object in the list */
         }

lstate.c

@@ -257,8 +257,9 @@ static void preinit_thread (lua_State *L, global_State *g) {
 }
 
 
-size_t luaE_threadsize (lua_State *L) {
-  size_t sz = sizeof(LX) + cast_uint(L->nci) * sizeof(CallInfo);
+lu_mem luaE_threadsize (lua_State *L) {
+  lu_mem sz = cast(lu_mem, sizeof(LX))
+            + cast_uint(L->nci) * sizeof(CallInfo);
   if (L->stack.p != NULL)
     sz += cast_uint(stacksize(L) + EXTRA_STACK) * sizeof(StackValue);
   return sz;

lstate.h

@@ -416,7 +416,7 @@ union GCUnion {
 
 LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
 LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
-LUAI_FUNC size_t luaE_threadsize (lua_State *L);
+LUAI_FUNC lu_mem luaE_threadsize (lua_State *L);
 LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
 LUAI_FUNC void luaE_shrinkCI (lua_State *L);
 LUAI_FUNC void luaE_checkcstack (lua_State *L);

ltable.c

@@ -863,8 +863,9 @@ Table *luaH_new (lua_State *L) {
 }
 
 
-size_t luaH_size (Table *t) {
-  size_t sz = sizeof(Table) + luaH_realasize(t) * (sizeof(Value) + 1);
+lu_mem luaH_size (Table *t) {
+  lu_mem sz = cast(lu_mem, sizeof(Table))
+            + luaH_realasize(t) * (sizeof(Value) + 1);
   if (!isdummy(t))
     sz += sizehash(t);
   return sz;

ltable.h

@@ -163,7 +163,7 @@ LUAI_FUNC Table *luaH_new (lua_State *L);
 LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned nasize,
                                                     unsigned nhsize);
 LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned nasize);
-LUAI_FUNC size_t luaH_size (Table *t);
+LUAI_FUNC lu_mem luaH_size (Table *t);
 LUAI_FUNC void luaH_free (lua_State *L, Table *t);
 LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
 LUAI_FUNC lua_Unsigned luaH_getn (Table *t);