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extra api checks for number of returns of C functions and for lua_yield

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Roberto Ierusalimschy
2009-11-27 13:37:59 -02:00
parent 3acf5ec5a1
commit 3e41afcec5
3 changed files with 10 additions and 6 deletions
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6
ldo.c
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@@ -1,5 +1,5 @@
/*
** $Id: ldo.c,v 2.72 2009/11/17 16:46:44 roberto Exp roberto $
** $Id: ldo.c,v 2.73 2009/11/25 15:27:51 roberto Exp roberto $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@@ -311,6 +311,7 @@ int luaD_precall (lua_State *L, StkId func, int nresults) {
lua_unlock(L);
n = (*curr_func(L)->c.f)(L); /* do the actual call */
lua_lock(L);
api_checknelems(L, n);
luaD_poscall(L, L->top - n);
return 1;
}
@@ -382,6 +383,7 @@ static void finishCcall (lua_State *L) {
lua_unlock(L);
n = (*ci->u.c.k)(L);
lua_lock(L);
api_checknelems(L, n);
/* finish 'luaD_precall' */
luaD_poscall(L, L->top - n);
}
@@ -424,6 +426,7 @@ static void resume (lua_State *L, void *ud) {
lua_unlock(L);
n = (*ci->u.c.k)(L); /* call continuation */
lua_lock(L);
api_checknelems(L, n);
firstArg = L->top - n;
}
G(L)->nCcalls--; /* finish 'luaD_call' */
@@ -511,6 +514,7 @@ LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) {
CallInfo *ci = L->ci;
luai_userstateyield(L, nresults);
lua_lock(L);
api_checknelems(L, nresults);
if (L->nny > 0)
luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
L->status = LUA_YIELD;