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2b4f7890b45ff6f82318ef271e3965d471d08970
[openwrt/openwrt.git] / package / lua / patches / 600-refcounting.patch
1 --- a/src/lapi.c
2 +++ b/src/lapi.c
3 @@ -27,8 +27,8 @@
4 #include "ltable.h"
5 #include "ltm.h"
6 #include "lundump.h"
7 -#include "lvm.h"
8 #include "lnum.h"
9 +#include "lvm.h"
10
11
12 const char lua_ident[] =
13 @@ -117,6 +117,7 @@ LUA_API void lua_xmove (lua_State *from,
14 from->top -= n;
15 for (i = 0; i < n; i++) {
16 setobj2s(to, to->top++, from->top + i);
17 + setnilvalue(from, from->top + i);
18 }
19 lua_unlock(to);
20 }
21 @@ -166,12 +167,14 @@ LUA_API void lua_settop (lua_State *L, i
22 if (idx >= 0) {
23 api_check(L, idx <= L->stack_last - L->base);
24 while (L->top < L->base + idx)
25 - setnilvalue(L->top++);
26 + setnilvalue(L, L->top++);
27 L->top = L->base + idx;
28 + setnilvalue(L, L->top);
29 }
30 else {
31 + int i;
32 api_check(L, -(idx+1) <= (L->top - L->base));
33 - L->top += idx+1; /* `subtract' index (index is negative) */
34 + setlvmtop(L, L->top + idx + 1); /* `subtract' index (index is negative) */
35 }
36 lua_unlock(L);
37 }
38 @@ -183,7 +186,7 @@ LUA_API void lua_remove (lua_State *L, i
39 p = index2adr(L, idx);
40 api_checkvalidindex(L, p);
41 while (++p < L->top) setobjs2s(L, p-1, p);
42 - L->top--;
43 + setlvmtop(L, L->top - 1);
44 lua_unlock(L);
45 }
46
47 @@ -196,6 +199,7 @@ LUA_API void lua_insert (lua_State *L, i
48 api_checkvalidindex(L, p);
49 for (q = L->top; q>p; q--) setobjs2s(L, q, q-1);
50 setobjs2s(L, p, L->top);
51 + setnilvalue(L, L->top);
52 lua_unlock(L);
53 }
54
55 @@ -220,7 +224,7 @@ LUA_API void lua_replace (lua_State *L,
56 if (idx < LUA_GLOBALSINDEX) /* function upvalue? */
57 luaC_barrier(L, curr_func(L), L->top - 1);
58 }
59 - L->top--;
60 + setlvmtop(L, L->top - 1);
61 lua_unlock(L);
62 }
63
64 @@ -259,14 +263,14 @@ LUA_API int lua_iscfunction (lua_State *
65
66
67 LUA_API int lua_isnumber (lua_State *L, int idx) {
68 - TValue n;
69 + TValue n = tvinit();
70 const TValue *o = index2adr(L, idx);
71 return tonumber(o, &n);
72 }
73
74
75 LUA_API int lua_isinteger (lua_State *L, int idx) {
76 - TValue tmp;
77 + TValue tmp = tvinit();
78 lua_Integer dum;
79 const TValue *o = index2adr(L, idx);
80 return tonumber(o,&tmp) && (ttisint(o) || tt_integer_valued(o,&dum));
81 @@ -319,7 +323,7 @@ LUA_API int lua_lessthan (lua_State *L,
82
83
84 LUA_API lua_Number lua_tonumber (lua_State *L, int idx) {
85 - TValue n;
86 + TValue n = tvinit();
87 const TValue *o = index2adr(L, idx);
88 if (tonumber(o, &n)) {
89 #ifdef LNUM_COMPLEX
90 @@ -333,7 +337,7 @@ LUA_API lua_Number lua_tonumber (lua_Sta
91
92
93 LUA_API lua_Integer lua_tointeger (lua_State *L, int idx) {
94 - TValue n;
95 + TValue n = tvinit();
96 /* Lua 5.1 documented behaviour is to return nonzero for non-integer:
97 * "If the number is not an integer, it is truncated in some non-specified way."
98 * I would suggest to change this, to return 0 for anything that would
99 @@ -369,7 +373,7 @@ LUA_API lua_Integer lua_tointeger (lua_S
100
101 #ifdef LNUM_COMPLEX
102 LUA_API lua_Complex lua_tocomplex (lua_State *L, int idx) {
103 - TValue tmp;
104 + TValue tmp = tvinit();
105 const TValue *o = index2adr(L, idx);
106 if (tonumber(o, &tmp))
107 return nvalue_complex(o);
108 @@ -465,7 +469,7 @@ LUA_API const void *lua_topointer (lua_S
109
110 LUA_API void lua_pushnil (lua_State *L) {
111 lua_lock(L);
112 - setnilvalue(L->top);
113 + setnilvalue(L, L->top);
114 api_incr_top(L);
115 lua_unlock(L);
116 }
117 @@ -548,8 +552,10 @@ LUA_API void lua_pushcclosure (lua_State
118 cl = luaF_newCclosure(L, n, getcurrenv(L));
119 cl->c.f = fn;
120 L->top -= n;
121 - while (n--)
122 + while (n--) {
123 setobj2n(L, &cl->c.upvalue[n], L->top+n);
124 + setnilvalue(L, L->top + n);
125 + }
126 setclvalue(L, L->top, cl);
127 lua_assert(iswhite(obj2gco(cl)));
128 api_incr_top(L);
129 @@ -600,7 +606,7 @@ LUA_API void lua_gettable (lua_State *L,
130
131 LUA_API void lua_getfield (lua_State *L, int idx, const char *k) {
132 StkId t;
133 - TValue key;
134 + TValue key = tvinit();
135 lua_lock(L);
136 t = index2adr(L, idx);
137 api_checkvalidindex(L, t);
138 @@ -689,7 +695,7 @@ LUA_API void lua_getfenv (lua_State *L,
139 setobj2s(L, L->top, gt(thvalue(o)));
140 break;
141 default:
142 - setnilvalue(L->top);
143 + setnilvalue(L, L->top);
144 break;
145 }
146 api_incr_top(L);
147 @@ -709,21 +715,21 @@ LUA_API void lua_settable (lua_State *L,
148 t = index2adr(L, idx);
149 api_checkvalidindex(L, t);
150 luaV_settable(L, t, L->top - 2, L->top - 1);
151 - L->top -= 2; /* pop index and value */
152 + setlvmtop(L, L->top - 2); /* pop index and value */
153 lua_unlock(L);
154 }
155
156
157 LUA_API void lua_setfield (lua_State *L, int idx, const char *k) {
158 StkId t;
159 - TValue key;
160 + TValue key = tvinit();
161 lua_lock(L);
162 api_checknelems(L, 1);
163 t = index2adr(L, idx);
164 api_checkvalidindex(L, t);
165 setsvalue(L, &key, luaS_new(L, k));
166 luaV_settable(L, t, &key, L->top - 1);
167 - L->top--; /* pop value */
168 + setlvmtop(L, L->top - 1); /* pop value */
169 lua_unlock(L);
170 }
171
172 @@ -736,7 +742,7 @@ LUA_API void lua_rawset (lua_State *L, i
173 api_check(L, ttistable(t));
174 setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1);
175 luaC_barriert(L, hvalue(t), L->top-1);
176 - L->top -= 2;
177 + setlvmtop(L, L->top - 2);
178 lua_unlock(L);
179 }
180
181 @@ -749,7 +755,7 @@ LUA_API void lua_rawseti (lua_State *L,
182 api_check(L, ttistable(o));
183 setobj2t(L, luaH_setint(L, hvalue(o), n), L->top-1);
184 luaC_barriert(L, hvalue(o), L->top-1);
185 - L->top--;
186 + setlvmtop(L, L->top - 1);
187 lua_unlock(L);
188 }
189
190 @@ -785,7 +791,7 @@ LUA_API int lua_setmetatable (lua_State
191 break;
192 }
193 }
194 - L->top--;
195 + setlvmtop(L, L->top - 1);
196 lua_unlock(L);
197 return 1;
198 }
199 @@ -814,7 +820,7 @@ LUA_API int lua_setfenv (lua_State *L, i
200 break;
201 }
202 if (res) luaC_objbarrier(L, gcvalue(o), hvalue(L->top - 1));
203 - L->top--;
204 + setlvmtop(L, L->top - 1);
205 lua_unlock(L);
206 return res;
207 }
208 @@ -1040,20 +1046,21 @@ LUA_API int lua_next (lua_State *L, int
209 if (more) {
210 api_incr_top(L);
211 }
212 - else /* no more elements */
213 - L->top -= 1; /* remove key */
214 + else { /* no more elements */
215 + setlvmtop(L, L->top - 1); /* remove key */
216 + }
217 lua_unlock(L);
218 return more;
219 }
220
221
222 LUA_API void lua_concat (lua_State *L, int n) {
223 lua_lock(L);
224 api_checknelems(L, n);
225 if (n >= 2) {
226 luaC_checkGC(L);
227 luaV_concat(L, n, cast_int(L->top - L->base) - 1);
228 - L->top -= (n-1);
229 + setlvmtop(L, L->top - (n-1));
230 }
231 else if (n == 0) { /* push empty string */
232 setsvalue2s(L, L->top, luaS_newlstr(L, "", 0));
233 @@ -1139,6 +1147,7 @@ LUA_API const char *lua_setupvalue (lua_
234 if (name) {
235 L->top--;
236 setobj(L, val, L->top);
237 + setnilvalue(L, L->top);
238 luaC_barrier(L, clvalue(fi), L->top);
239 }
240 lua_unlock(L);
241 @@ -1160,7 +1169,7 @@ LUA_API const char *lua_setupvalue (lua_
242 int lua_pushvalue_as_number (lua_State *L, int idx)
243 {
244 const TValue *o = index2adr(L, idx);
245 - TValue tmp;
246 + TValue tmp = tvinit();
247 lua_Integer i;
248 if (ttisnumber(o)) {
249 if ( (!ttisint(o)) && tt_integer_valued(o,&i)) {
250 --- a/src/lcode.c
251 +++ b/src/lcode.c
252 @@ -23,6 +23,7 @@
253 #include "lparser.h"
254 #include "ltable.h"
255 #include "lnum.h"
256 +#include "lvm.h"
257
258
259 #define hasjumps(e) ((e)->t != (e)->f)
260 @@ -248,7 +249,7 @@ static int addk (FuncState *fs, TValue *
261 setivalue(idx, fs->nk);
262 luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
263 MAXARG_Bx, "constant table overflow");
264 - while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
265 + while (oldsize < f->sizek) setnilvalue(L, &f->k[oldsize++]);
266 setobj(L, &f->k[fs->nk], v);
267 luaC_barrier(L, f, v);
268 return fs->nk++;
269 @@ -257,21 +258,24 @@ static int addk (FuncState *fs, TValue *
270
271
272 int luaK_stringK (FuncState *fs, TString *s) {
273 - TValue o;
274 + TValue o = tvinit();
275 setsvalue(fs->L, &o, s);
276 + luaV_unref(fs->L, &o);
277 return addk(fs, &o, &o);
278 }
279
280
281 int luaK_numberK (FuncState *fs, lua_Number r) {
282 - TValue o;
283 + lua_State *L = fs->L;
284 + TValue o = tvinit();
285 setnvalue(&o, r);
286 return addk(fs, &o, &o);
287 }
288
289
290 int luaK_integerK (FuncState *fs, lua_Integer r) {
291 - TValue o;
292 + lua_State *L = fs->L;
293 + TValue o = tvinit();
294 setivalue(&o, r);
295 return addk(fs, &o, &o);
296 }
297 @@ -279,22 +283,24 @@ int luaK_integerK (FuncState *fs, lua_In
298
299 #ifdef LNUM_COMPLEX
300 static int luaK_imagK (FuncState *fs, lua_Number r) {
301 - TValue o;
302 + lua_State *L = fs->L;
303 + TValue o = tvinit();
304 setnvalue_complex(&o, r*I);
305 return addk(fs, &o, &o);
306 }
307 #endif
308
309 static int boolK (FuncState *fs, int b) {
310 - TValue o;
311 + lua_State *L = fs->L;
312 + TValue o = tvinit();
313 setbvalue(&o, b);
314 return addk(fs, &o, &o);
315 }
316
317
318 static int nilK (FuncState *fs) {
319 - TValue k, v;
320 - setnilvalue(&v);
321 + TValue k = tvinit(), v = tvinit();
322 + setnilvalue(fs->L, &v);
323 /* cannot use nil as key; instead use table itself to represent nil */
324 sethvalue(fs->L, &k, fs->h);
325 return addk(fs, &k, &v);
326 --- a/src/ldebug.c
327 +++ b/src/ldebug.c
328 @@ -142,6 +142,7 @@ LUA_API const char *lua_setlocal (lua_St
329 if (name)
330 setobjs2s(L, ci->base + (n - 1), L->top - 1);
331 L->top--; /* pop value */
332 + setnilvalue(L, L->top);
333 lua_unlock(L);
334 return name;
335 }
336 @@ -176,7 +177,7 @@ static void info_tailcall (lua_Debug *ar
337
338 static void collectvalidlines (lua_State *L, Closure *f) {
339 if (f == NULL || f->c.isC) {
340 - setnilvalue(L->top);
341 + setnilvalue(L, L->top);
342 }
343 else {
344 Table *t = luaH_new(L, 0, 0);
345 @@ -248,7 +249,7 @@ LUA_API int lua_getinfo (lua_State *L, c
346 }
347 status = auxgetinfo(L, what, ar, f, ci);
348 if (strchr(what, 'f')) {
349 - if (f == NULL) setnilvalue(L->top);
350 + if (f == NULL) setnilvalue(L, L->top);
351 else setclvalue(L, L->top, f);
352 incr_top(L);
353 }
354 @@ -586,7 +587,7 @@ void luaG_concaterror (lua_State *L, Stk
355
356
357 void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
358 - TValue temp;
359 + TValue temp = tvinit();
360 if (luaV_tonumber(p1, &temp) == NULL)
361 p2 = p1; /* first operand is wrong */
362 luaG_typeerror(L, p2, "perform arithmetic on");
363 --- a/src/ldo.c
364 +++ b/src/ldo.c
365 @@ -211,7 +211,7 @@ static StkId adjust_varargs (lua_State *
366 Table *htab = NULL;
367 StkId base, fixed;
368 for (; actual < nfixargs; ++actual)
369 - setnilvalue(L->top++);
370 + setnilvalue(L, L->top++);
371 #if defined(LUA_COMPAT_VARARG)
372 if (p->is_vararg & VARARG_NEEDSARG) { /* compat. with old-style vararg? */
373 int nvar = actual - nfixargs; /* number of extra arguments */
374 @@ -229,7 +229,7 @@ static StkId adjust_varargs (lua_State *
375 base = L->top; /* final position of first argument */
376 for (i=0; i<nfixargs; i++) {
377 setobjs2s(L, L->top++, fixed+i);
378 - setnilvalue(fixed+i);
379 + setnilvalue(L, fixed+i);
380 }
381 /* add `arg' parameter */
382 if (htab) {
383 @@ -294,7 +294,7 @@ int luaD_precall (lua_State *L, StkId fu
384 ci->tailcalls = 0;
385 ci->nresults = nresults;
386 for (st = L->top; st < ci->top; st++)
387 - setnilvalue(st);
388 + setnilvalue(L, st);
389 L->top = ci->top;
390 if (L->hookmask & LUA_MASKCALL) {
391 L->savedpc++; /* hooks assume 'pc' is already incremented */
392 @@ -354,8 +354,8 @@ int luaD_poscall (lua_State *L, StkId fi
393 for (i = wanted; i != 0 && firstResult < L->top; i--)
394 setobjs2s(L, res++, firstResult++);
395 while (i-- > 0)
396 - setnilvalue(res++);
397 - L->top = res;
398 + setnilvalue(L, res++);
399 + setlvmtop(L, res);
400 return (wanted - LUA_MULTRET); /* 0 iff wanted == LUA_MULTRET */
401 }
402
403 @@ -463,8 +463,12 @@ int luaD_pcall (lua_State *L, Pfunc func
404 status = luaD_rawrunprotected(L, func, u);
405 if (status != 0) { /* an error occurred? */
406 StkId oldtop = restorestack(L, old_top);
407 + StkId curtop = L->top;
408 + int i;
409 luaF_close(L, oldtop); /* close eventual pending closures */
410 luaD_seterrorobj(L, status, oldtop);
411 + for (i = (curtop - L->top); i-- > 0;)
412 + setnilvalue(L, L->top + i);
413 L->nCcalls = oldnCcalls;
414 L->ci = restoreci(L, old_ci);
415 L->base = L->ci->base;
416 --- a/src/lfunc.c
417 +++ b/src/lfunc.c
418 @@ -17,7 +17,7 @@
419 #include "lmem.h"
420 #include "lobject.h"
421 #include "lstate.h"
422 -
423 +#include "lvm.h"
424
425
426 Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) {
427 @@ -45,7 +45,7 @@ UpVal *luaF_newupval (lua_State *L) {
428 UpVal *uv = luaM_new(L, UpVal);
429 luaC_link(L, obj2gco(uv), LUA_TUPVAL);
430 uv->v = &uv->u.value;
431 - setnilvalue(uv->v);
432 + setnilvalue(L, uv->v);
433 return uv;
434 }
435
436 @@ -67,8 +67,14 @@ UpVal *luaF_findupval (lua_State *L, Stk
437 uv = luaM_new(L, UpVal); /* not found: create a new one */
438 uv->tt = LUA_TUPVAL;
439 uv->marked = luaC_white(g);
440 - uv->v = level; /* current value lives in the stack */
441 + uv->v = luaV_ref(level); /* current value lives in the stack */
442 uv->next = *pp; /* chain it in the proper position */
443 + if (uv->next) {
444 + uv->prev = uv->next->gch.prev;
445 + uv->next->gch.prev = (GCObject *)uv;
446 + } else {
447 + uv->prev = NULL;
448 + }
449 *pp = obj2gco(uv);
450 uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */
451 uv->u.l.next = g->uvhead.u.l.next;
452 --- a/src/lgc.c
453 +++ b/src/lgc.c
454 @@ -21,6 +21,7 @@
455 #include "lstring.h"
456 #include "ltable.h"
457 #include "ltm.h"
458 +#include "lvm.h"
459
460
461 #define GCSTEPSIZE 1024u
462 @@ -265,7 +266,7 @@ static void traversestack (global_State
463 for (o = l->stack; o < l->top; o++)
464 markvalue(g, o);
465 for (; o <= lim; o++)
466 - setnilvalue(o);
467 + setnilvalue(l, o);
468 checkstacksizes(l, lim);
469 }
470
471 @@ -348,7 +349,7 @@ static int iscleared (const TValue *o, i
472 /*
473 ** clear collected entries from weaktables
474 */
475 -static void cleartable (GCObject *l) {
476 +static void cleartable (lua_State *L, GCObject *l) {
477 while (l) {
478 Table *h = gco2h(l);
479 int i = h->sizearray;
480 @@ -358,7 +359,7 @@ static void cleartable (GCObject *l) {
481 while (i--) {
482 TValue *o = &h->array[i];
483 if (iscleared(o, 0)) /* value was collected? */
484 - setnilvalue(o); /* remove value */
485 + setnilvalue(L, o); /* remove value */
486 }
487 }
488 i = sizenode(h);
489 @@ -366,7 +367,7 @@ static void cleartable (GCObject *l) {
490 Node *n = gnode(h, i);
491 if (!ttisnil(gval(n)) && /* non-empty entry? */
492 (iscleared(key2tval(n), 1) || iscleared(gval(n), 0))) {
493 - setnilvalue(gval(n)); /* remove value ... */
494 + setnilvalue(L, gval(n)); /* remove value ... */
495 removeentry(n); /* remove entry from table */
496 }
497 }
498 @@ -375,7 +376,7 @@ static void cleartable (GCObject *l) {
499 }
500
501
502 -static void freeobj (lua_State *L, GCObject *o) {
503 +void luaC_freeobj (lua_State *L, GCObject *o) {
504 switch (o->gch.tt) {
505 case LUA_TPROTO: luaF_freeproto(L, gco2p(o)); break;
506 case LUA_TFUNCTION: luaF_freeclosure(L, gco2cl(o)); break;
507 @@ -418,10 +419,12 @@ static GCObject **sweeplist (lua_State *
508 }
509 else { /* must erase `curr' */
510 lua_assert(isdead(g, curr) || deadmask == bitmask(SFIXEDBIT));
511 + if (curr->gch.next)
512 + curr->gch.next->gch.prev = curr->gch.prev;
513 *p = curr->gch.next;
514 if (curr == g->rootgc) /* is the first element of the list? */
515 g->rootgc = curr->gch.next; /* adjust first */
516 - freeobj(L, curr);
517 + luaC_freeobj(L, curr);
518 }
519 }
520 return p;
521 @@ -543,7 +551,7 @@ static void atomic (lua_State *L) {
522 udsize = luaC_separateudata(L, 0); /* separate userdata to be finalized */
523 marktmu(g); /* mark `preserved' userdata */
524 udsize += propagateall(g); /* remark, to propagate `preserveness' */
525 - cleartable(g->weak); /* remove collected objects from weak tables */
526 + cleartable(L, g->weak); /* remove collected objects from weak tables */
527 /* flip current white */
528 g->currentwhite = cast_byte(otherwhite(g));
529 g->sweepstrgc = 0;
530 @@ -685,8 +693,11 @@ void luaC_barrierback (lua_State *L, Tab
531
532 void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
533 global_State *g = G(L);
534 + o->gch.prev = (GCObject*)&g->rootgc;
535 o->gch.next = g->rootgc;
536 g->rootgc = o;
537 + if (o->gch.next)
538 + o->gch.next->gch.prev = o;
539 o->gch.marked = luaC_white(g);
540 o->gch.tt = tt;
541 }
542 --- a/src/lgc.h
543 +++ b/src/lgc.h
544 @@ -105,6 +105,6 @@ LUAI_FUNC void luaC_link (lua_State *L,
545 LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv);
546 LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v);
547 LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t);
548 -
549 +LUAI_FUNC void luaC_freeobj (lua_State *L, GCObject *o);
550
551 #endif
552 --- a/src/lmem.c
553 +++ b/src/lmem.c
554 @@ -6,6 +6,7 @@
555
556
557 #include <stddef.h>
558 +#include <string.h>
559
560 #define lmem_c
561 #define LUA_CORE
562 @@ -80,6 +81,8 @@ void *luaM_realloc_ (lua_State *L, void
563 if (block == NULL && nsize > 0)
564 luaD_throw(L, LUA_ERRMEM);
565 lua_assert((nsize == 0) == (block == NULL));
566 + if (nsize > osize)
567 + memset((char *)block + osize, 0, nsize - osize);
568 g->totalbytes = (g->totalbytes - osize) + nsize;
569 return block;
570 }
571 --- a/src/lobject.h
572 +++ b/src/lobject.h
573 @@ -44,7 +44,7 @@ typedef union GCObject GCObject;
574 ** Common Header for all collectable objects (in macro form, to be
575 ** included in other objects)
576 */
577 -#define CommonHeader GCObject *next; lu_byte tt; lu_byte marked
578 +#define CommonHeader GCObject *next; GCObject *prev; lu_byte tt; lu_byte marked
579
580
581 /*
582 @@ -83,6 +83,7 @@ typedef struct lua_TValue {
583 TValuefields;
584 } TValue;
585
586 +#define tvinit() { .value.b = 0, .tt = 0 }
587
588 /* Macros to test type */
589 #define ttisnil(o) (ttype(o) == LUA_TNIL)
590 @@ -145,15 +146,15 @@ typedef struct lua_TValue {
591
592
593 /* Macros to set values */
594 -#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
595 +#define setnilvalue(L, obj) (luaV_unref(L, (obj))->tt=LUA_TNIL)
596
597 /* Must not have side effects, 'x' may be expression.
598 */
599 #define setivalue(obj,x) \
600 - { TValue *i_o=(obj); i_o->value.i=(x); i_o->tt=LUA_TINT; }
601 + { TValue *i_o=luaV_unref(L, (obj)); i_o->value.i=(x); i_o->tt=LUA_TINT; }
602
603 # define setnvalue(obj,x) \
604 - { TValue *i_o=(obj); i_o->value.n= (x); i_o->tt=LUA_TNUMBER; }
605 + { TValue *i_o=luaV_unref(L, (obj)); i_o->value.n= (x); i_o->tt=LUA_TNUMBER; }
606
607 /* Note: Complex always has "inline", both are C99.
608 */
609 @@ -170,45 +171,45 @@ typedef struct lua_TValue {
610
611
612 #define setpvalue(obj,x) \
613 - { TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
614 + { TValue *i_o=luaV_unref(L, (obj)); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
615
616 #define setbvalue(obj,x) \
617 - { TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; }
618 + { TValue *i_o=luaV_unref(L, (obj)); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; }
619
620 #define setsvalue(L,obj,x) \
621 - { TValue *i_o=(obj); \
622 - i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \
623 + { TValue *i_o=(obj); TString *val=(x); luaS_ref(val); luaV_unref(L, obj); \
624 + i_o->value.gc=cast(GCObject *, (val)); i_o->tt=LUA_TSTRING; \
625 checkliveness(G(L),i_o); }
626
627 #define setuvalue(L,obj,x) \
628 - { TValue *i_o=(obj); \
629 + { TValue *i_o=luaV_unref(L, (obj)); \
630 i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \
631 checkliveness(G(L),i_o); }
632
633 #define setthvalue(L,obj,x) \
634 - { TValue *i_o=(obj); \
635 + { TValue *i_o=luaV_unref(L, (obj)); \
636 i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \
637 checkliveness(G(L),i_o); }
638
639 #define setclvalue(L,obj,x) \
640 - { TValue *i_o=(obj); \
641 + { TValue *i_o=luaV_unref(L, (obj)); \
642 i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \
643 checkliveness(G(L),i_o); }
644
645 #define sethvalue(L,obj,x) \
646 - { TValue *i_o=(obj); \
647 + { TValue *i_o=luaV_unref(L, (obj)); \
648 i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \
649 checkliveness(G(L),i_o); }
650
651 #define setptvalue(L,obj,x) \
652 - { TValue *i_o=(obj); \
653 + { TValue *i_o=luaV_unref(L, (obj)); \
654 i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
655 checkliveness(G(L),i_o); }
656
657 #define setobj(L,obj1,obj2) \
658 - { const TValue *o2=(obj2); TValue *o1=(obj1); \
659 + do { const TValue *o2=luaV_ref((TValue *)(obj2)); TValue *o1=luaV_unref(L, (obj1)); \
660 o1->value = o2->value; o1->tt=o2->tt; \
661 - checkliveness(G(L),o1); }
662 + checkliveness(G(L),o1); } while(0)
663
664
665 /*
666 @@ -253,6 +254,7 @@ typedef union TString {
667 lu_byte reserved;
668 unsigned int hash;
669 size_t len;
670 + int refcount;
671 } tsv;
672 } TString;
673
674 @@ -409,6 +411,7 @@ typedef struct Table {
675 #define twoto(x) (1<<(x))
676 #define sizenode(t) (twoto((t)->lsizenode))
677
678 +#include "lstring.h"
679
680 #define luaO_nilobject (&luaO_nilobject_)
681
682 --- a/src/lparser.c
683 +++ b/src/lparser.c
684 @@ -24,6 +24,7 @@
685 #include "lstate.h"
686 #include "lstring.h"
687 #include "ltable.h"
688 +#include "lvm.h"
689
690
691
692 @@ -146,7 +147,7 @@ static int registerlocalvar (LexState *l
693 luaM_growvector(ls->L, f->locvars, fs->nlocvars, f->sizelocvars,
694 LocVar, SHRT_MAX, "too many local variables");
695 while (oldsize < f->sizelocvars) f->locvars[oldsize++].varname = NULL;
696 - f->locvars[fs->nlocvars].varname = varname;
697 + f->locvars[fs->nlocvars].varname = luaS_ref(varname);
698 luaC_objbarrier(ls->L, f, varname);
699 return fs->nlocvars++;
700 }
701 @@ -194,7 +195,7 @@ static int indexupvalue (FuncState *fs,
702 luaM_growvector(fs->L, f->upvalues, f->nups, f->sizeupvalues,
703 TString *, MAX_INT, "");
704 while (oldsize < f->sizeupvalues) f->upvalues[oldsize++] = NULL;
705 - f->upvalues[f->nups] = name;
706 + f->upvalues[f->nups] = luaS_ref(name);
707 luaC_objbarrier(fs->L, f, name);
708 lua_assert(v->k == VLOCAL || v->k == VUPVAL);
709 fs->upvalues[f->nups].k = cast_byte(v->k);
710 @@ -341,7 +342,7 @@ static void open_func (LexState *ls, Fun
711 fs->nlocvars = 0;
712 fs->nactvar = 0;
713 fs->bl = NULL;
714 - f->source = ls->source;
715 + f->source = luaS_ref(ls->source);
716 f->maxstacksize = 2; /* registers 0/1 are always valid */
717 fs->h = luaH_new(L, 0, 0);
718 /* anchor table of constants and prototype (to avoid being collected) */
719 --- a/src/lstate.c
720 +++ b/src/lstate.c
721 @@ -22,6 +22,7 @@
722 #include "lstring.h"
723 #include "ltable.h"
724 #include "ltm.h"
725 +#include "lvm.h"
726
727
728 #define state_size(x) (sizeof(x) + LUAI_EXTRASPACE)
729 @@ -52,7 +53,7 @@ static void stack_init (lua_State *L1, l
730 L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
731 /* initialize first ci */
732 L1->ci->func = L1->top;
733 - setnilvalue(L1->top++); /* `function' entry for this `ci' */
734 + setnilvalue(L1, L1->top++); /* `function' entry for this `ci' */
735 L1->base = L1->ci->base = L1->top;
736 L1->ci->top = L1->top + LUA_MINSTACK;
737 }
738 @@ -98,7 +99,7 @@ static void preinit_state (lua_State *L,
739 L->base_ci = L->ci = NULL;
740 L->savedpc = NULL;
741 L->errfunc = 0;
742 - setnilvalue(gt(L));
743 + setnilvalue(L, gt(L));
744 }
745
746
747 @@ -163,7 +164,7 @@ LUA_API lua_State *lua_newstate (lua_All
748 g->strt.size = 0;
749 g->strt.nuse = 0;
750 g->strt.hash = NULL;
751 - setnilvalue(registry(L));
752 + setnilvalue(L, registry(L));
753 luaZ_initbuffer(L, &g->buff);
754 g->panic = NULL;
755 g->gcstate = GCSpause;
756 --- a/src/lstring.c
757 +++ b/src/lstring.c
758 @@ -37,6 +37,9 @@ void luaS_resize (lua_State *L, int news
759 int h1 = lmod(h, newsize); /* new position */
760 lua_assert(cast_int(h%newsize) == lmod(h, newsize));
761 p->gch.next = newhash[h1]; /* chain it */
762 + if (p->gch.next)
763 + p->gch.next->gch.prev = p;
764 + p->gch.prev = NULL;
765 newhash[h1] = p;
766 p = next;
767 }
768 @@ -59,11 +62,15 @@ static TString *newlstr (lua_State *L, c
769 ts->tsv.marked = luaC_white(G(L));
770 ts->tsv.tt = LUA_TSTRING;
771 ts->tsv.reserved = 0;
772 + ts->tsv.refcount = 0;
773 memcpy(ts+1, str, l*sizeof(char));
774 ((char *)(ts+1))[l] = '\0'; /* ending 0 */
775 tb = &G(L)->strt;
776 h = lmod(h, tb->size);
777 ts->tsv.next = tb->hash[h]; /* chain new entry */
778 + if (ts->tsv.next)
779 + ts->tsv.next->gch.prev = (GCObject *)ts;
780 + ts->tsv.prev = NULL;
781 tb->hash[h] = obj2gco(ts);
782 tb->nuse++;
783 if (tb->nuse > cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
784 @@ -109,3 +116,29 @@ Udata *luaS_newudata (lua_State *L, size
785 return u;
786 }
787
788 +void luaS_unref(lua_State *L, TString *ts) {
789 + if (!L || !ts)
790 + return;
791 + if (testbit(ts->tsv.marked, FIXEDBIT))
792 + return;
793 + ts->tsv.refcount--;
794 + if (ts->tsv.refcount < 0) {
795 + fprintf(stderr, "REFCOUNT BUG, COUNT=%d, str=%s, len=%d\n", ts->tsv.refcount, (char *) (ts + 1), (int) ts->tsv.len);
796 + } else if (ts->tsv.refcount)
797 + return;
798 +
799 + if (ts->tsv.prev) {
800 + ts->tsv.prev->gch.next = ts->tsv.next;
801 + } else {
802 + unsigned int idx = lmod(ts->tsv.hash, G(L)->strt.size);
803 + lua_assert(G(L)->strt.hash[index] == (GCObject*)ts);
804 + G(L)->strt.hash[idx] = ts->tsv.next;
805 + }
806 +
807 + if (ts->tsv.next)
808 + ts->tsv.next->gch.prev = ts->tsv.prev;
809 +
810 + luaC_freeobj(L, (GCObject *) ts);
811 +}
812 +
813 +
814 --- a/src/lstring.h
815 +++ b/src/lstring.h
816 @@ -7,7 +7,7 @@
817 #ifndef lstring_h
818 #define lstring_h
819
820 -
821 +#include <stdio.h>
822 #include "lgc.h"
823 #include "lobject.h"
824 #include "lstate.h"
825 @@ -23,6 +23,12 @@
826
827 #define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT)
828
829 +static inline TString *luaS_ref(TString *ts) {
830 + ts->tsv.refcount++;
831 + return ts;
832 +}
833 +
834 +LUA_API void luaS_unref(lua_State *L, TString *ts);
835 LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
836 LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e);
837 LUA_API TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
838 --- a/src/ltable.c
839 +++ b/src/ltable.c
840 @@ -34,6 +34,7 @@
841 #include "lstate.h"
842 #include "ltable.h"
843 #include "lnum.h"
844 +#include "lvm.h"
845
846
847 /*
848 @@ -278,7 +279,7 @@ static void setarrayvector (lua_State *L
849 int i;
850 luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
851 for (i=t->sizearray; i<size; i++)
852 - setnilvalue(&t->array[i]);
853 + setnilvalue(L, &t->array[i]);
854 t->sizearray = size;
855 }
856
857 @@ -299,8 +300,8 @@ static void setnodevector (lua_State *L,
858 for (i=0; i<size; i++) {
859 Node *n = gnode(t, i);
860 gnext(n) = NULL;
861 - setnilvalue(gkey(n));
862 - setnilvalue(gval(n));
863 + setnilvalue(L, gkey(n));
864 + setnilvalue(L, gval(n));
865 }
866 }
867 t->lsizenode = cast_byte(lsize);
868 @@ -427,9 +428,11 @@ static TValue *newkey (lua_State *L, Tab
869 othern = gnext(othern); /* find previous */
870 }
871 gnext(othern) = n; /* redo the chain with `n' in place of `mp' */
872 + luaV_ref((TValue *) gkey(mp));
873 + luaV_ref(gval(mp));
874 *n = *mp; /* copy colliding node into free pos. (mp->next also goes) */
875 gnext(mp) = NULL; /* now `mp' is free */
876 - setnilvalue(gval(mp));
877 + setnilvalue(L, gval(mp));
878 }
879 else { /* colliding node is in its own main position */
880 /* new node will go into free position */
881 @@ -438,6 +441,7 @@ static TValue *newkey (lua_State *L, Tab
882 mp = n;
883 }
884 }
885 + luaV_ref((TValue *) key);
886 gkey(mp)->value = key->value; gkey(mp)->tt = key->tt;
887 luaC_barriert(L, t, key);
888 lua_assert(ttisnil(gval(mp)));
889 @@ -530,7 +534,7 @@ TValue *luaH_setint (lua_State *L, Table
890 if (p != luaO_nilobject)
891 return cast(TValue *, p);
892 else {
893 - TValue k;
894 + TValue k = tvinit();
895 setivalue(&k, key);
896 return newkey(L, t, &k);
897 }
898 @@ -542,7 +546,7 @@ TValue *luaH_setstr (lua_State *L, Table
899 if (p != luaO_nilobject)
900 return cast(TValue *, p);
901 else {
902 - TValue k;
903 + TValue k = tvinit();
904 setsvalue(L, &k, key);
905 return newkey(L, t, &k);
906 }
907 --- a/src/luac.c
908 +++ b/src/luac.c
909 @@ -20,8 +20,9 @@
910 #include "lmem.h"
911 #include "lobject.h"
912 #include "lopcodes.h"
913 -#include "lstring.h"
914 #include "lundump.h"
915 +#include "lvm.h"
916 +#include "lstring.h"
917
918 #define PROGNAME "luac" /* default program name */
919 #define OUTPUT PROGNAME ".out" /* default output file */
920 --- a/src/lundump.c
921 +++ b/src/lundump.c
922 @@ -19,6 +19,7 @@
923 #include "lstring.h"
924 #include "lundump.h"
925 #include "lzio.h"
926 +#include "lvm.h"
927
928 typedef struct {
929 lua_State* L;
930 @@ -133,7 +134,7 @@ static TString* LoadString(LoadState* S)
931 {
932 char* s=luaZ_openspace(S->L,S->b,size);
933 LoadBlock(S,s,size);
934 - return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
935 + return luaS_ref(luaS_newlstr(S->L,s,size-1)); /* remove trailing '\0' */
936 }
937 }
938
939 @@ -149,11 +150,12 @@ static Proto* LoadFunction(LoadState* S,
940
941 static void LoadConstants(LoadState* S, Proto* f)
942 {
943 + lua_State *L = S->L;
944 int i,n;
945 n=LoadInt(S);
946 f->k=luaM_newvector(S->L,n,TValue);
947 f->sizek=n;
948 - for (i=0; i<n; i++) setnilvalue(&f->k[i]);
949 + for (i=0; i<n; i++) setnilvalue(L, &f->k[i]);
950 for (i=0; i<n; i++)
951 {
952 TValue* o=&f->k[i];
953 @@ -161,7 +163,7 @@ static void LoadConstants(LoadState* S,
954 switch (t)
955 {
956 case LUA_TNIL:
957 - setnilvalue(o);
958 + setnilvalue(L, o);
959 break;
960 case LUA_TBOOLEAN:
961 setbvalue(o,LoadChar(S)!=0);
962 @@ -229,6 +231,7 @@ static Proto* LoadFunction(LoadState* S,
963 LoadDebug(S,f);
964 IF (!luaG_checkcode(f), "bad code");
965 S->L->top--;
966 + setnilvalue(S->L, S->L->top);
967 S->L->nCcalls--;
968 return f;
969 }
970 --- a/src/lvm.c
971 +++ b/src/lvm.c
972 @@ -39,6 +39,7 @@
973 * If 'obj' is a string, it is tried to be interpreted as a number.
974 */
975 const TValue *luaV_tonumber ( const TValue *obj, TValue *n) {
976 + lua_State *L = NULL; /* FIXME */
977 lua_Number d;
978 lua_Integer i;
979
980 @@ -384,6 +386,7 @@ void luaV_concat (lua_State *L, int tota
981 size_t l = tsvalue(top-i)->len;
982 memcpy(buffer+tl, svalue(top-i), l);
983 tl += l;
984 + setnilvalue(L, top - i);
985 }
986 setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
987 }
988 @@ -420,7 +423,7 @@ void luaV_concat (lua_State *L, int tota
989 */
990 static void Arith (lua_State *L, StkId ra, const TValue *rb,
991 const TValue *rc, TMS op) {
992 - TValue tempb, tempc;
993 + TValue tempb = tvinit(), tempc = tvinit();
994 const TValue *b, *c;
995 lua_Number nb,nc;
996
997 @@ -663,7 +666,7 @@ void luaV_execute (lua_State *L, int nex
998 OPCODE_TARGET(LOADNIL) {
999 TValue *rb = RB(i);
1000 do {
1001 - setnilvalue(rb--);
1002 + setnilvalue(L, rb--);
1003 } while (rb >= ra);
1004 continue;
1005 }
1006 @@ -673,7 +676,7 @@ void luaV_execute (lua_State *L, int nex
1007 continue;
1008 }
1009 OPCODE_TARGET(GETGLOBAL) {
1010 - TValue g;
1011 + TValue g = tvinit();
1012 TValue *rb = KBx(i);
1013 sethvalue(L, &g, cl->env);
1014 lua_assert(ttisstring(rb));
1015 @@ -685,7 +688,7 @@ void luaV_execute (lua_State *L, int nex
1016 continue;
1017 }
1018 OPCODE_TARGET(SETGLOBAL) {
1019 - TValue g;
1020 + TValue g = tvinit();
1021 sethvalue(L, &g, cl->env);
1022 lua_assert(ttisstring(KBx(i)));
1023 Protect(luaV_settable(L, &g, KBx(i), ra));
1024 @@ -895,7 +900,7 @@ void luaV_execute (lua_State *L, int nex
1025 if (--nexeccalls == 0) /* was previous function running `here'? */
1026 return; /* no: return */
1027 else { /* yes: continue its execution */
1028 - if (b) L->top = L->ci->top;
1029 + if (b) setlvmtop(L, L->ci->top);
1030 lua_assert(isLua(L->ci));
1031 lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
1032 goto reentry;
1033 @@ -986,6 +991,7 @@ void luaV_execute (lua_State *L, int nex
1034 for (; n > 0; n--) {
1035 TValue *val = ra+n;
1036 setobj2t(L, luaH_setint(L, h, last--), val);
1037 + setnilvalue(L, val);
1038 luaC_barriert(L, h, val);
1039 }
1040 continue;
1041 @@ -1030,7 +1036,7 @@ void luaV_execute (lua_State *L, int nex
1042 setobjs2s(L, ra + j, ci->base - n + j);
1043 }
1044 else {
1045 - setnilvalue(ra + j);
1046 + setnilvalue(L, ra + j);
1047 }
1048 }
1049 continue;
1050 --- a/src/lvm.h
1051 +++ b/src/lvm.h
1052 @@ -11,6 +11,7 @@
1053 #include "ldo.h"
1054 #include "lobject.h"
1055 #include "ltm.h"
1056 +#include "lstring.h"
1057
1058
1059 #define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
1060 @@ -19,6 +20,19 @@
1061
1062 #define equalobj(L,o1,o2) (ttype_ext_same(o1,o2) && luaV_equalval(L, o1, o2))
1063
1064 +static inline TValue *luaV_ref(TValue *tv)
1065 +{
1066 + if (ttisstring(tv))
1067 + luaS_ref(rawtsvalue(tv));
1068 + return tv;
1069 +}
1070 +
1071 +static inline TValue *luaV_unref(lua_State *L, TValue *tv)
1072 +{
1073 + if (ttisstring(tv))
1074 + luaS_unref(L, rawtsvalue(tv));
1075 + return tv;
1076 +}
1077
1078 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
1079 LUAI_FUNC int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2);
1080 --- a/src/llex.c
1081 +++ b/src/llex.c
1082 @@ -23,6 +23,7 @@
1083 #include "ltable.h"
1084 #include "lzio.h"
1085 #include "lnum.h"
1086 +#include "lvm.h"
1087
1088
1089
1090 @@ -69,7 +70,7 @@ static void save (LexState *ls, int c) {
1091 void luaX_init (lua_State *L) {
1092 int i;
1093 for (i=0; i<NUM_RESERVED; i++) {
1094 - TString *ts = luaS_new(L, luaX_tokens[i]);
1095 + TString *ts = luaS_ref(luaS_new(L, luaX_tokens[i]));
1096 luaS_fix(ts); /* reserved words are never collected */
1097 lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
1098 ts->tsv.reserved = cast_byte(i+1); /* reserved word */
1099 @@ -125,7 +126,7 @@ void luaX_syntaxerror (LexState *ls, con
1100
1101 TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
1102 lua_State *L = ls->L;
1103 - TString *ts = luaS_newlstr(L, str, l);
1104 + TString *ts = luaS_ref(luaS_newlstr(L, str, l));
1105 TValue *o = luaH_setstr(L, ls->fs->h, ts); /* entry for `str' */
1106 if (ttisnil(o))
1107 setbvalue(o, 1); /* make sure `str' will not be collected */
1108 @@ -152,7 +153,7 @@ void luaX_setinput (lua_State *L, LexSta
1109 ls->fs = NULL;
1110 ls->linenumber = 1;
1111 ls->lastline = 1;
1112 - ls->source = source;
1113 + ls->source = luaS_ref(source);
1114 luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */
1115 next(ls); /* read first char */
1116 }
1117 --- a/src/lstate.h
1118 +++ b/src/lstate.h
1119 @@ -144,6 +144,13 @@ union GCObject {
1120 struct lua_State th; /* thread */
1121 };
1122
1123 +#define setlvmtop(L, val) do { \
1124 + int __i; \
1125 + for (__i = L->top - val; __i-- > 0;) \
1126 + setnilvalue(L, val + __i); \
1127 + L->top = val; \
1128 +} while (0)
1129 +
1130
1131 /* macros to convert a GCObject into a specific value */
1132 #define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
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