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bug: GC metamethod calls could mess C/Lua stack syncronization

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Roberto Ierusalimschy
2003-02-28 16:45:15 -03:00
parent 6b6bc532a4
commit 69dd9461e5
5 changed files with 44 additions and 19 deletions
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11
lstate.c
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@@ -1,5 +1,5 @@
/*
** $Id: lstate.c,v 1.119 2003/02/10 17:32:50 roberto Exp roberto $
** $Id: lstate.c,v 1.120 2003/02/13 16:07:57 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@@ -206,9 +206,14 @@ static void callallgcTM (lua_State *L, void *ud) {
LUA_API void lua_close (lua_State *L) {
lua_lock(L);
L = G(L)->mainthread; /* only the main thread can be closed */
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_separateudata(L); /* separate udata that have GC metamethods */
/* repeat until no more errors */
while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0) /* skip */;
L->errfunc = 0; /* no error function during GC metamethods */
do { /* repeat until no more errors */
L->ci = L->base_ci;
L->base = L->top = L->ci->base;
L->nCcalls = 0;
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
lua_assert(G(L)->tmudata == NULL);
close_state(L);
}