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lua/lua-5.4.3-bug10.patch

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diff -up lua-5.4.3/lua-5.4.3-tests/api.lua.bug10 lua-5.4.3/lua-5.4.3-tests/api.lua
--- lua-5.4.3/lua-5.4.3-tests/api.lua.bug10 2022-01-24 17:07:28.084973092 -0500
+++ lua-5.4.3/lua-5.4.3-tests/api.lua 2022-01-24 17:08:50.306551450 -0500
@@ -804,15 +804,14 @@ F = function (x)
d = nil
assert(debug.getmetatable(x).__gc == F)
assert(load("table.insert({}, {})"))() -- create more garbage
- collectgarbage() -- force a GC during GC
- assert(debug.getmetatable(x).__gc == F) -- previous GC did not mess this?
+ assert(not collectgarbage()) -- GC during GC (no op)
local dummy = {} -- create more garbage during GC
if A ~= nil then
assert(type(A) == "userdata")
assert(T.udataval(A) == B)
debug.getmetatable(A) -- just access it
end
- A = x -- ressucita userdata
+ A = x -- ressurect userdata
B = udval
return 1,2,3
end
diff -up lua-5.4.3/lua-5.4.3-tests/gc.lua.bug10 lua-5.4.3/lua-5.4.3-tests/gc.lua
--- lua-5.4.3/lua-5.4.3-tests/gc.lua.bug10 2022-01-24 17:08:57.241600231 -0500
+++ lua-5.4.3/lua-5.4.3-tests/gc.lua 2022-01-24 17:10:20.100183086 -0500
@@ -676,11 +676,13 @@ end
-- just to make sure
assert(collectgarbage'isrunning')
-do -- check that the collector is reentrant in incremental mode
+do -- check that the collector is not reentrant in incremental mode
+ local res = true
setmetatable({}, {__gc = function ()
- collectgarbage()
+ res = collectgarbage()
end})
collectgarbage()
+ assert(not res)
end
diff -up lua-5.4.3/src/lapi.c.bug10 lua-5.4.3/src/lapi.c
--- lua-5.4.3/src/lapi.c.bug10 2022-01-24 16:56:54.409515673 -0500
+++ lua-5.4.3/src/lapi.c 2022-01-24 16:59:36.136653287 -0500
@@ -1126,18 +1126,19 @@ LUA_API int lua_status (lua_State *L) {
LUA_API int lua_gc (lua_State *L, int what, ...) {
va_list argp;
int res = 0;
- global_State *g;
+ global_State *g = G(L);
+ if (g->gcstp & GCSTPGC) /* internal stop? */
+ return -1; /* all options are invalid when stopped */
lua_lock(L);
- g = G(L);
va_start(argp, what);
switch (what) {
case LUA_GCSTOP: {
- g->gcrunning = 0;
+ g->gcstp = GCSTPUSR; /* stopeed by the user */
break;
}
case LUA_GCRESTART: {
luaE_setdebt(g, 0);
- g->gcrunning = 1;
+ g->gcstp = 0; /* (GCSTPGC must be already zero here) */
break;
}
case LUA_GCCOLLECT: {
@@ -1156,8 +1157,8 @@ LUA_API int lua_gc (lua_State *L, int wh
case LUA_GCSTEP: {
int data = va_arg(argp, int);
l_mem debt = 1; /* =1 to signal that it did an actual step */
- lu_byte oldrunning = g->gcrunning;
- g->gcrunning = 1; /* allow GC to run */
+ lu_byte oldstp = g->gcstp;
+ g->gcstp = 0; /* allow GC to run (GCSTPGC must be zero here) */
if (data == 0) {
luaE_setdebt(g, 0); /* do a basic step */
luaC_step(L);
@@ -1167,7 +1168,7 @@ LUA_API int lua_gc (lua_State *L, int wh
luaE_setdebt(g, debt);
luaC_checkGC(L);
}
- g->gcrunning = oldrunning; /* restore previous state */
+ g->gcstp = oldstp; /* restore previous state */
if (debt > 0 && g->gcstate == GCSpause) /* end of cycle? */
res = 1; /* signal it */
break;
@@ -1185,7 +1186,7 @@ LUA_API int lua_gc (lua_State *L, int wh
break;
}
case LUA_GCISRUNNING: {
- res = g->gcrunning;
+ res = gcrunning(g);
break;
}
case LUA_GCGEN: {
diff -up lua-5.4.3/src/lbaselib.c.bug10 lua-5.4.3/src/lbaselib.c
--- lua-5.4.3/src/lbaselib.c.bug10 2022-01-24 16:59:43.337703940 -0500
+++ lua-5.4.3/src/lbaselib.c 2022-01-24 17:02:19.898805225 -0500
@@ -182,12 +182,20 @@ static int luaB_rawset (lua_State *L) {
static int pushmode (lua_State *L, int oldmode) {
- lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental"
- : "generational");
+ if (oldmode == -1)
+ luaL_pushfail(L); /* invalid call to 'lua_gc' */
+ else
+ lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental"
+ : "generational");
return 1;
}
+/*
+** check whether call to 'lua_gc' was valid (not inside a finalizer)
+*/
+#define checkvalres(res) { if (res == -1) break; }
+
static int luaB_collectgarbage (lua_State *L) {
static const char *const opts[] = {"stop", "restart", "collect",
"count", "step", "setpause", "setstepmul",
@@ -200,12 +208,14 @@ static int luaB_collectgarbage (lua_Stat
case LUA_GCCOUNT: {
int k = lua_gc(L, o);
int b = lua_gc(L, LUA_GCCOUNTB);
+ checkvalres(k);
lua_pushnumber(L, (lua_Number)k + ((lua_Number)b/1024));
return 1;
}
case LUA_GCSTEP: {
int step = (int)luaL_optinteger(L, 2, 0);
int res = lua_gc(L, o, step);
+ checkvalres(res);
lua_pushboolean(L, res);
return 1;
}
@@ -213,11 +223,13 @@ static int luaB_collectgarbage (lua_Stat
case LUA_GCSETSTEPMUL: {
int p = (int)luaL_optinteger(L, 2, 0);
int previous = lua_gc(L, o, p);
+ checkvalres(previous);
lua_pushinteger(L, previous);
return 1;
}
case LUA_GCISRUNNING: {
int res = lua_gc(L, o);
+ checkvalres(res);
lua_pushboolean(L, res);
return 1;
}
@@ -234,10 +246,13 @@ static int luaB_collectgarbage (lua_Stat
}
default: {
int res = lua_gc(L, o);
+ checkvalres(res);
lua_pushinteger(L, res);
return 1;
}
}
+ luaL_pushfail(L); /* invalid call (inside a finalizer) */
+ return 1;
}
diff -up lua-5.4.3/src/lgc.c.bug10 lua-5.4.3/src/lgc.c
--- lua-5.4.3/src/lgc.c.bug10 2022-01-24 17:02:30.231877910 -0500
+++ lua-5.4.3/src/lgc.c 2022-01-24 17:04:02.486526852 -0500
@@ -906,16 +906,16 @@ static void GCTM (lua_State *L) {
if (!notm(tm)) { /* is there a finalizer? */
int status;
lu_byte oldah = L->allowhook;
- int running = g->gcrunning;
+ int oldgcstp = g->gcstp;
+ g->gcstp = GCSTPGC; /* avoid GC steps */
L->allowhook = 0; /* stop debug hooks during GC metamethod */
- g->gcrunning = 0; /* avoid GC steps */
setobj2s(L, L->top++, tm); /* push finalizer... */
setobj2s(L, L->top++, &v); /* ... and its argument */
L->ci->callstatus |= CIST_FIN; /* will run a finalizer */
status = luaD_pcall(L, dothecall, NULL, savestack(L, L->top - 2), 0);
L->ci->callstatus &= ~CIST_FIN; /* not running a finalizer anymore */
L->allowhook = oldah; /* restore hooks */
- g->gcrunning = running; /* restore state */
+ g->gcstp = oldgcstp; /* restore state */
if (l_unlikely(status != LUA_OK)) { /* error while running __gc? */
luaE_warnerror(L, "__gc metamethod");
L->top--; /* pops error object */
@@ -1502,9 +1502,11 @@ static void deletelist (lua_State *L, GC
*/
void luaC_freeallobjects (lua_State *L) {
global_State *g = G(L);
+ g->gcstp = GCSTPGC;
luaC_changemode(L, KGC_INC);
separatetobefnz(g, 1); /* separate all objects with finalizers */
lua_assert(g->finobj == NULL);
+ g->gcstp = 0;
callallpendingfinalizers(L);
deletelist(L, g->allgc, obj2gco(g->mainthread));
deletelist(L, g->finobj, NULL);
@@ -1678,7 +1680,7 @@ static void incstep (lua_State *L, globa
void luaC_step (lua_State *L) {
global_State *g = G(L);
lua_assert(!g->gcemergency);
- if (g->gcrunning) { /* running? */
+ if (gcrunning(g)) { /* running? */
if(isdecGCmodegen(g))
genstep(L, g);
else
diff -up lua-5.4.3/src/lgc.h.bug10 lua-5.4.3/src/lgc.h
--- lua-5.4.3/src/lgc.h.bug10 2022-01-24 17:04:08.890571899 -0500
+++ lua-5.4.3/src/lgc.h 2022-01-24 17:04:41.260799595 -0500
@@ -148,6 +148,15 @@
*/
#define isdecGCmodegen(g) (g->gckind == KGC_GEN || g->lastatomic != 0)
+
+/*
+** Control when GC is running:
+*/
+#define GCSTPUSR 1 /* bit true when GC stopped by user */
+#define GCSTPGC 2 /* bit true when GC stopped by itself */
+#define gcrunning(g) ((g)->gcstp == 0)
+
+
/*
** Does one step of collection when debt becomes positive. 'pre'/'pos'
** allows some adjustments to be done only when needed. macro
diff -up lua-5.4.3/src/lstate.c.bug10 lua-5.4.3/src/lstate.c
--- lua-5.4.3/src/lstate.c.bug10 2022-01-24 17:04:51.775873561 -0500
+++ lua-5.4.3/src/lstate.c 2022-01-24 17:05:26.544118136 -0500
@@ -236,7 +236,7 @@ static void f_luaopen (lua_State *L, voi
luaS_init(L);
luaT_init(L);
luaX_init(L);
- g->gcrunning = 1; /* allow gc */
+ g->gcstp = 0; /* allow gc */
setnilvalue(&g->nilvalue); /* now state is complete */
luai_userstateopen(L);
}
@@ -373,7 +373,7 @@ LUA_API lua_State *lua_newstate (lua_All
g->ud_warn = NULL;
g->mainthread = L;
g->seed = luai_makeseed(L);
- g->gcrunning = 0; /* no GC while building state */
+ g->gcstp = GCSTPGC; /* no GC while building state */
g->strt.size = g->strt.nuse = 0;
g->strt.hash = NULL;
setnilvalue(&g->l_registry);
diff -up lua-5.4.3/src/lstate.h.bug10 lua-5.4.3/src/lstate.h
--- lua-5.4.3/src/lstate.h.bug10 2022-01-24 17:05:30.179143707 -0500
+++ lua-5.4.3/src/lstate.h 2022-01-24 17:07:05.577814767 -0500
@@ -263,7 +263,7 @@ typedef struct global_State {
lu_byte gcstopem; /* stops emergency collections */
lu_byte genminormul; /* control for minor generational collections */
lu_byte genmajormul; /* control for major generational collections */
- lu_byte gcrunning; /* true if GC is running */
+ lu_byte gcstp; /* control whether GC is running */
lu_byte gcemergency; /* true if this is an emergency collection */
lu_byte gcpause; /* size of pause between successive GCs */
lu_byte gcstepmul; /* GC "speed" */
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