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bug: luaD_protectedparser must protect its garbage collection too

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Roberto Ierusalimschy 2003-01-23 09:31:38 -02:00
parent a153cafd8d
commit e44e579dc1
2 changed files with 20 additions and 15 deletions
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6
bugs
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@ -313,3 +313,9 @@ Fri Dec 20 09:53:19 UTC 2002
>> `resume' was checking the wrong value for stack overflow
(by Maik Zimmermann; since 5.0b)
** ldo.c
Thu Jan 23 11:29:06 UTC 2003
>> error during garbage collection in luaD_protectedparser is not being
>> protected
(by Benoit Germain; since 5.0a)

29
ldo.c
View File

@ -1,5 +1,5 @@
/*
** $Id: ldo.c,v 1.210 2002/12/04 17:28:27 roberto Exp roberto $
** $Id: ldo.c,v 1.211 2002/12/04 17:38:31 roberto Exp roberto $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@ -415,35 +415,34 @@ struct SParser { /* data to `f_parser' */
};
static void f_parser (lua_State *L, void *ud) {
lu_mem old_blocks;
Proto *tf;
Closure *cl;
struct SParser *p = cast(struct SParser *, ud);
Proto *tf = p->bin ? luaU_undump(L, p->z, &p->buff) :
luaY_parser(L, p->z, &p->buff);
Closure *cl = luaF_newLclosure(L, 0, gt(L));
/* before parsing, give a (good) chance to GC */
if (G(L)->nblocks + G(L)->nblocks/4 >= G(L)->GCthreshold)
luaC_collectgarbage(L);
old_blocks = G(L)->nblocks;
tf = p->bin ? luaU_undump(L, p->z, &p->buff) : luaY_parser(L, p->z, &p->buff);
cl = luaF_newLclosure(L, 0, gt(L));
cl->l.p = tf;
setclvalue(L->top, cl);
incr_top(L);
/* add new memory to threshold (as it probably will stay) */
lua_assert(G(L)->nblocks >= old_blocks);
G(L)->GCthreshold += (G(L)->nblocks - old_blocks);
}
int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
struct SParser p;
lu_mem old_blocks;
int status;
ptrdiff_t oldtopr = savestack(L, L->top); /* save current top */
p.z = z; p.bin = bin;
luaZ_initbuffer(L, &p.buff);
/* before parsing, give a (good) chance to GC */
if (G(L)->nblocks + G(L)->nblocks/4 >= G(L)->GCthreshold)
luaC_collectgarbage(L);
old_blocks = G(L)->nblocks;
status = luaD_rawrunprotected(L, f_parser, &p);
luaZ_freebuffer(L, &p.buff);
if (status == 0) {
/* add new memory to threshold (as it probably will stay) */
lua_assert(G(L)->nblocks >= old_blocks);
G(L)->GCthreshold += (G(L)->nblocks - old_blocks);
}
else { /* error */
if (status != 0) { /* error */
StkId oldtop = restorestack(L, oldtopr);
seterrorobj(L, status, oldtop);
}