commit d404f0c276e4a81d044be8c7647635acbe13ff06
parent 48e42261ac5be367c90d8079da3371509b5c325a
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 21 Nov 2002 12:14:20 -0200
global_State must be deallocated (and so allocated) with NULL also
(otherwise it trys to decrement inside itself after its own free)
Diffstat:
2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/lmem.c b/lmem.c
@@ -1,5 +1,5 @@
/*
-** $Id: lmem.c,v 1.58 2002/10/08 18:45:07 roberto Exp roberto $
+** $Id: lmem.c,v 1.59 2002/10/25 21:29:20 roberto Exp roberto $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/
@@ -67,6 +67,7 @@ void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {
l_free(block, oldsize);
block = NULL;
}
+ else return NULL; /* avoid `nblocks' computations when oldsize==size==0 */
}
else if (size >= MAX_SIZET)
luaG_runerror(L, "memory allocation error: block too big");
@@ -78,7 +79,8 @@ void *luaM_realloc (lua_State *L, void *block, lu_mem oldsize, lu_mem size) {
else return NULL; /* error before creating state! */
}
}
- if (L && G(L)) {
+ if (L) {
+ lua_assert(G(L) != NULL && G(L)->nblocks > 0);
G(L)->nblocks -= oldsize;
G(L)->nblocks += size;
}
diff --git a/lstate.c b/lstate.c
@@ -1,5 +1,5 @@
/*
-** $Id: lstate.c,v 1.112 2002/11/18 11:01:55 roberto Exp roberto $
+** $Id: lstate.c,v 1.113 2002/11/19 14:12:13 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@@ -84,8 +84,9 @@ static void freestack (lua_State *L, lua_State *L1) {
*/
static void f_luaopen (lua_State *L, void *ud) {
/* create a new global state */
- global_State *g = luaM_new(L, global_State);
+ global_State *g = luaM_new(NULL, global_State);
UNUSED(ud);
+ if (g == NULL) luaD_throw(L, LUA_ERRMEM);
L->l_G = g;
g->mainthread = L;
g->GCthreshold = 0; /* mark it as unfinished state */
@@ -147,7 +148,7 @@ static void close_state (lua_State *L) {
freestack(L, L);
if (G(L)) {
lua_assert(G(L)->nblocks == sizeof(lua_State) + sizeof(global_State));
- luaM_freelem(L, G(L));
+ luaM_freelem(NULL, G(L));
}
freestate(NULL, L);
}