Lua 5.4.2 runtime

This commit is contained in:
Syping 2021-03-06 01:54:36 +01:00
parent ddc4ab91c4
commit 406905b359
33 changed files with 424 additions and 435 deletions

View file

@ -4,7 +4,7 @@
!define COMP_NAME "Syping" !define COMP_NAME "Syping"
!define WEB_SITE "https://luaengine.syping.de/" !define WEB_SITE "https://luaengine.syping.de/"
!define VERSION "0.1.0.0" !define VERSION "0.1.0.0"
!define COPYRIGHT "Copyright © 2018-2020 Syping" !define COPYRIGHT "Copyright © 2018-2021 Syping"
!define DESCRIPTION "LuaEngine Runtime and Compiler" !define DESCRIPTION "LuaEngine Runtime and Compiler"
!define INSTALLER_NAME "luaengine_setup.exe" !define INSTALLER_NAME "luaengine_setup.exe"
!define MAIN_APP_RUNTIME "luaengine.exe" !define MAIN_APP_RUNTIME "luaengine.exe"

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@ -55,6 +55,6 @@ win32 {
RC_ICONS = ../../res/lua.ico RC_ICONS = ../../res/lua.ico
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine Runtime" QMAKE_TARGET_DESCRIPTION = "LuaEngine Runtime"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2021 Syping"
QMAKE_TARGET_PRODUCT = "luaengine" QMAKE_TARGET_PRODUCT = "luaengine"
} }

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@ -52,6 +52,6 @@ win32 {
RC_ICONS = ../../res/lua.ico RC_ICONS = ../../res/lua.ico
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine Compiler" QMAKE_TARGET_DESCRIPTION = "LuaEngine Compiler"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2021 Syping"
QMAKE_TARGET_PRODUCT = "luaenginec" QMAKE_TARGET_PRODUCT = "luaenginec"
} }

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@ -57,6 +57,6 @@ win32 {
RC_ICONS = ../../res/lua.ico RC_ICONS = ../../res/lua.ico
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine CLI Runtime" QMAKE_TARGET_DESCRIPTION = "LuaEngine CLI Runtime"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2020-2021 Syping"
QMAKE_TARGET_PRODUCT = "luaenginecli" QMAKE_TARGET_PRODUCT = "luaenginecli"
} }

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@ -1383,13 +1383,16 @@ LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
static UpVal **getupvalref (lua_State *L, int fidx, int n, LClosure **pf) { static UpVal **getupvalref (lua_State *L, int fidx, int n, LClosure **pf) {
static const UpVal *const nullup = NULL;
LClosure *f; LClosure *f;
TValue *fi = index2value(L, fidx); TValue *fi = index2value(L, fidx);
api_check(L, ttisLclosure(fi), "Lua function expected"); api_check(L, ttisLclosure(fi), "Lua function expected");
f = clLvalue(fi); f = clLvalue(fi);
api_check(L, (1 <= n && n <= f->p->sizeupvalues), "invalid upvalue index");
if (pf) *pf = f; if (pf) *pf = f;
return &f->upvals[n - 1]; /* get its upvalue pointer */ if (1 <= n && n <= f->p->sizeupvalues)
return &f->upvals[n - 1]; /* get its upvalue pointer */
else
return (UpVal**)&nullup;
} }
@ -1401,11 +1404,14 @@ LUA_API void *lua_upvalueid (lua_State *L, int fidx, int n) {
} }
case LUA_VCCL: { /* C closure */ case LUA_VCCL: { /* C closure */
CClosure *f = clCvalue(fi); CClosure *f = clCvalue(fi);
api_check(L, 1 <= n && n <= f->nupvalues, "invalid upvalue index"); if (1 <= n && n <= f->nupvalues)
return &f->upvalue[n - 1]; return &f->upvalue[n - 1];
} /* else */
} /* FALLTHROUGH */
case LUA_VLCF:
return NULL; /* light C functions have no upvalues */
default: { default: {
api_check(L, 0, "closure expected"); api_check(L, 0, "function expected");
return NULL; return NULL;
} }
} }
@ -1417,6 +1423,7 @@ LUA_API void lua_upvaluejoin (lua_State *L, int fidx1, int n1,
LClosure *f1; LClosure *f1;
UpVal **up1 = getupvalref(L, fidx1, n1, &f1); UpVal **up1 = getupvalref(L, fidx1, n1, &f1);
UpVal **up2 = getupvalref(L, fidx2, n2, NULL); UpVal **up2 = getupvalref(L, fidx2, n2, NULL);
api_check(L, *up1 != NULL && *up2 != NULL, "invalid upvalue index");
*up1 = *up2; *up1 = *up2;
luaC_objbarrier(L, f1, *up1); luaC_objbarrier(L, f1, *up1);
} }

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@ -283,10 +283,10 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
LUALIB_API int luaL_execresult (lua_State *L, int stat) { LUALIB_API int luaL_execresult (lua_State *L, int stat) {
const char *what = "exit"; /* type of termination */
if (stat != 0 && errno != 0) /* error with an 'errno'? */ if (stat != 0 && errno != 0) /* error with an 'errno'? */
return luaL_fileresult(L, 0, NULL); return luaL_fileresult(L, 0, NULL);
else { else {
const char *what = "exit"; /* type of termination */
l_inspectstat(stat, what); /* interpret result */ l_inspectstat(stat, what); /* interpret result */
if (*what == 'e' && stat == 0) /* successful termination? */ if (*what == 'e' && stat == 0) /* successful termination? */
lua_pushboolean(L, 1); lua_pushboolean(L, 1);
@ -1006,43 +1006,67 @@ static int panic (lua_State *L) {
/* /*
** Emit a warning. '*warnstate' means: ** Warning functions:
** 0 - warning system is off; ** warnfoff: warning system is off
** 1 - ready to start a new message; ** warnfon: ready to start a new message
** 2 - previous message is to be continued. ** warnfcont: previous message is to be continued
*/ */
static void warnf (void *ud, const char *message, int tocont) { static void warnfoff (void *ud, const char *message, int tocont);
int *warnstate = (int *)ud; static void warnfon (void *ud, const char *message, int tocont);
if (*warnstate != 2 && !tocont && *message == '@') { /* control message? */ static void warnfcont (void *ud, const char *message, int tocont);
if (strcmp(message, "@off") == 0)
*warnstate = 0;
else if (strcmp(message, "@on") == 0) /*
*warnstate = 1; ** Check whether message is a control message. If so, execute the
return; ** control or ignore it if unknown.
*/
static int checkcontrol (lua_State *L, const char *message, int tocont) {
if (tocont || *(message++) != '@') /* not a control message? */
return 0;
else {
if (strcmp(message, "off") == 0)
lua_setwarnf(L, warnfoff, L); /* turn warnings off */
else if (strcmp(message, "on") == 0)
lua_setwarnf(L, warnfon, L); /* turn warnings on */
return 1; /* it was a control message */
} }
else if (*warnstate == 0) /* warnings off? */ }
return;
if (*warnstate == 1) /* previous message was the last? */
lua_writestringerror("%s", "Lua warning: "); /* start a new warning */ static void warnfoff (void *ud, const char *message, int tocont) {
checkcontrol((lua_State *)ud, message, tocont);
}
/*
** Writes the message and handle 'tocont', finishing the message
** if needed and setting the next warn function.
*/
static void warnfcont (void *ud, const char *message, int tocont) {
lua_State *L = (lua_State *)ud;
lua_writestringerror("%s", message); /* write message */ lua_writestringerror("%s", message); /* write message */
if (tocont) /* not the last part? */ if (tocont) /* not the last part? */
*warnstate = 2; /* to be continued */ lua_setwarnf(L, warnfcont, L); /* to be continued */
else { /* last part */ else { /* last part */
lua_writestringerror("%s", "\n"); /* finish message with end-of-line */ lua_writestringerror("%s", "\n"); /* finish message with end-of-line */
*warnstate = 1; /* ready to start a new message */ lua_setwarnf(L, warnfon, L); /* next call is a new message */
} }
} }
static void warnfon (void *ud, const char *message, int tocont) {
if (checkcontrol((lua_State *)ud, message, tocont)) /* control message? */
return; /* nothing else to be done */
lua_writestringerror("%s", "Lua warning: "); /* start a new warning */
warnfcont(ud, message, tocont); /* finish processing */
}
LUALIB_API lua_State *luaL_newstate (void) { LUALIB_API lua_State *luaL_newstate (void) {
lua_State *L = lua_newstate(l_alloc, NULL); lua_State *L = lua_newstate(l_alloc, NULL);
if (L) { if (L) {
int *warnstate; /* space for warning state */
lua_atpanic(L, &panic); lua_atpanic(L, &panic);
warnstate = (int *)lua_newuserdatauv(L, sizeof(int), 0); lua_setwarnf(L, warnfoff, L); /* default is warnings off */
luaL_ref(L, LUA_REGISTRYINDEX); /* make sure it won't be collected */
*warnstate = 0; /* default is warnings off */
lua_setwarnf(L, warnf, warnstate);
} }
return L; return L;
} }

View file

@ -753,7 +753,7 @@ void luaK_setoneret (FuncState *fs, expdesc *e) {
/* /*
** Ensure that expression 'e' is not a variable (nor a constant). ** Ensure that expression 'e' is not a variable (nor a <const>).
** (Expression still may have jump lists.) ** (Expression still may have jump lists.)
*/ */
void luaK_dischargevars (FuncState *fs, expdesc *e) { void luaK_dischargevars (FuncState *fs, expdesc *e) {
@ -805,8 +805,8 @@ void luaK_dischargevars (FuncState *fs, expdesc *e) {
/* /*
** Ensures expression value is in register 'reg' (and therefore ** Ensure expression value is in register 'reg', making 'e' a
** 'e' will become a non-relocatable expression). ** non-relocatable expression.
** (Expression still may have jump lists.) ** (Expression still may have jump lists.)
*/ */
static void discharge2reg (FuncState *fs, expdesc *e, int reg) { static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
@ -860,7 +860,8 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
/* /*
** Ensures expression value is in any register. ** Ensure expression value is in a register, making 'e' a
** non-relocatable expression.
** (Expression still may have jump lists.) ** (Expression still may have jump lists.)
*/ */
static void discharge2anyreg (FuncState *fs, expdesc *e) { static void discharge2anyreg (FuncState *fs, expdesc *e) {
@ -946,8 +947,11 @@ int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
exp2reg(fs, e, e->u.info); /* put final result in it */ exp2reg(fs, e, e->u.info); /* put final result in it */
return e->u.info; return e->u.info;
} }
/* else expression has jumps and cannot change its register
to hold the jump values, because it is a local variable.
Go through to the default case. */
} }
luaK_exp2nextreg(fs, e); /* otherwise, use next available register */ luaK_exp2nextreg(fs, e); /* default: use next available register */
return e->u.info; return e->u.info;
} }

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@ -281,25 +281,33 @@ static int db_setupvalue (lua_State *L) {
** Check whether a given upvalue from a given closure exists and ** Check whether a given upvalue from a given closure exists and
** returns its index ** returns its index
*/ */
static int checkupval (lua_State *L, int argf, int argnup) { static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) {
void *id;
int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */ int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */
luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */ luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */
luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup, id = lua_upvalueid(L, argf, nup);
"invalid upvalue index"); if (pnup) {
return nup; luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index");
*pnup = nup;
}
return id;
} }
static int db_upvalueid (lua_State *L) { static int db_upvalueid (lua_State *L) {
int n = checkupval(L, 1, 2); void *id = checkupval(L, 1, 2, NULL);
lua_pushlightuserdata(L, lua_upvalueid(L, 1, n)); if (id != NULL)
lua_pushlightuserdata(L, id);
else
luaL_pushfail(L);
return 1; return 1;
} }
static int db_upvaluejoin (lua_State *L) { static int db_upvaluejoin (lua_State *L) {
int n1 = checkupval(L, 1, 2); int n1, n2;
int n2 = checkupval(L, 3, 4); checkupval(L, 1, 2, &n1);
checkupval(L, 3, 4, &n2);
luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected"); luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected"); luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
lua_upvaluejoin(L, 1, n1, 3, n2); lua_upvaluejoin(L, 1, n1, 3, n2);
@ -440,10 +448,7 @@ static int db_traceback (lua_State *L) {
static int db_setcstacklimit (lua_State *L) { static int db_setcstacklimit (lua_State *L) {
int limit = (int)luaL_checkinteger(L, 1); int limit = (int)luaL_checkinteger(L, 1);
int res = lua_setcstacklimit(L, limit); int res = lua_setcstacklimit(L, limit);
if (res == 0) lua_pushinteger(L, res);
lua_pushboolean(L, 0);
else
lua_pushinteger(L, res);
return 1; return 1;
} }

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@ -139,8 +139,7 @@ l_noret luaD_throw (lua_State *L, int errcode) {
int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) { int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
global_State *g = G(L); l_uint32 oldnCcalls = L->nCcalls;
l_uint32 oldnCcalls = g->Cstacklimit - (L->nCcalls + L->nci);
struct lua_longjmp lj; struct lua_longjmp lj;
lj.status = LUA_OK; lj.status = LUA_OK;
lj.previous = L->errorJmp; /* chain new error handler */ lj.previous = L->errorJmp; /* chain new error handler */
@ -149,7 +148,7 @@ int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
(*f)(L, ud); (*f)(L, ud);
); );
L->errorJmp = lj.previous; /* restore old error handler */ L->errorJmp = lj.previous; /* restore old error handler */
L->nCcalls = g->Cstacklimit - oldnCcalls - L->nci; L->nCcalls = oldnCcalls;
return lj.status; return lj.status;
} }
@ -183,21 +182,20 @@ static void correctstack (lua_State *L, StkId oldstack, StkId newstack) {
int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) { int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) {
int lim = L->stacksize; int lim = stacksize(L);
StkId newstack = luaM_reallocvector(L, L->stack, lim, newsize, StackValue); StkId newstack = luaM_reallocvector(L, L->stack,
lim + EXTRA_STACK, newsize + EXTRA_STACK, StackValue);
lua_assert(newsize <= LUAI_MAXSTACK || newsize == ERRORSTACKSIZE); lua_assert(newsize <= LUAI_MAXSTACK || newsize == ERRORSTACKSIZE);
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK);
if (unlikely(newstack == NULL)) { /* reallocation failed? */ if (unlikely(newstack == NULL)) { /* reallocation failed? */
if (raiseerror) if (raiseerror)
luaM_error(L); luaM_error(L);
else return 0; /* do not raise an error */ else return 0; /* do not raise an error */
} }
for (; lim < newsize; lim++) for (; lim < newsize; lim++)
setnilvalue(s2v(newstack + lim)); /* erase new segment */ setnilvalue(s2v(newstack + lim + EXTRA_STACK)); /* erase new segment */
correctstack(L, L->stack, newstack); correctstack(L, L->stack, newstack);
L->stack = newstack; L->stack = newstack;
L->stacksize = newsize; L->stack_last = L->stack + newsize;
L->stack_last = L->stack + newsize - EXTRA_STACK;
return 1; return 1;
} }
@ -207,51 +205,73 @@ int luaD_reallocstack (lua_State *L, int newsize, int raiseerror) {
** is true, raises any error; otherwise, return 0 in case of errors. ** is true, raises any error; otherwise, return 0 in case of errors.
*/ */
int luaD_growstack (lua_State *L, int n, int raiseerror) { int luaD_growstack (lua_State *L, int n, int raiseerror) {
int size = L->stacksize; int size = stacksize(L);
int newsize = 2 * size; /* tentative new size */ if (unlikely(size > LUAI_MAXSTACK)) {
if (unlikely(size > LUAI_MAXSTACK)) { /* need more space after extra size? */ /* if stack is larger than maximum, thread is already using the
extra space reserved for errors, that is, thread is handling
a stack error; cannot grow further than that. */
lua_assert(stacksize(L) == ERRORSTACKSIZE);
if (raiseerror) if (raiseerror)
luaD_throw(L, LUA_ERRERR); /* error inside message handler */ luaD_throw(L, LUA_ERRERR); /* error inside message handler */
else return 0; return 0; /* if not 'raiseerror', just signal it */
} }
else { else {
int needed = cast_int(L->top - L->stack) + n + EXTRA_STACK; int newsize = 2 * size; /* tentative new size */
int needed = cast_int(L->top - L->stack) + n;
if (newsize > LUAI_MAXSTACK) /* cannot cross the limit */ if (newsize > LUAI_MAXSTACK) /* cannot cross the limit */
newsize = LUAI_MAXSTACK; newsize = LUAI_MAXSTACK;
if (newsize < needed) /* but must respect what was asked for */ if (newsize < needed) /* but must respect what was asked for */
newsize = needed; newsize = needed;
if (unlikely(newsize > LUAI_MAXSTACK)) { /* stack overflow? */ if (likely(newsize <= LUAI_MAXSTACK))
return luaD_reallocstack(L, newsize, raiseerror);
else { /* stack overflow */
/* add extra size to be able to handle the error message */ /* add extra size to be able to handle the error message */
luaD_reallocstack(L, ERRORSTACKSIZE, raiseerror); luaD_reallocstack(L, ERRORSTACKSIZE, raiseerror);
if (raiseerror) if (raiseerror)
luaG_runerror(L, "stack overflow"); luaG_runerror(L, "stack overflow");
else return 0; return 0;
} }
} /* else no errors */ }
return luaD_reallocstack(L, newsize, raiseerror);
} }
static int stackinuse (lua_State *L) { static int stackinuse (lua_State *L) {
CallInfo *ci; CallInfo *ci;
int res;
StkId lim = L->top; StkId lim = L->top;
for (ci = L->ci; ci != NULL; ci = ci->previous) { for (ci = L->ci; ci != NULL; ci = ci->previous) {
if (lim < ci->top) lim = ci->top; if (lim < ci->top) lim = ci->top;
} }
lua_assert(lim <= L->stack_last); lua_assert(lim <= L->stack_last);
return cast_int(lim - L->stack) + 1; /* part of stack in use */ res = cast_int(lim - L->stack) + 1; /* part of stack in use */
if (res < LUA_MINSTACK)
res = LUA_MINSTACK; /* ensure a minimum size */
return res;
} }
/*
** If stack size is more than 3 times the current use, reduce that size
** to twice the current use. (So, the final stack size is at most 2/3 the
** previous size, and half of its entries are empty.)
** As a particular case, if stack was handling a stack overflow and now
** it is not, 'max' (limited by LUAI_MAXSTACK) will be smaller than
** stacksize (equal to ERRORSTACKSIZE in this case), and so the stack
** will be reduced to a "regular" size.
*/
void luaD_shrinkstack (lua_State *L) { void luaD_shrinkstack (lua_State *L) {
int inuse = stackinuse(L); int inuse = stackinuse(L);
int goodsize = inuse + BASIC_STACK_SIZE; int nsize = inuse * 2; /* proposed new size */
if (goodsize > LUAI_MAXSTACK) int max = inuse * 3; /* maximum "reasonable" size */
goodsize = LUAI_MAXSTACK; /* respect stack limit */ if (max > LUAI_MAXSTACK) {
max = LUAI_MAXSTACK; /* respect stack limit */
if (nsize > LUAI_MAXSTACK)
nsize = LUAI_MAXSTACK;
}
/* if thread is currently not handling a stack overflow and its /* if thread is currently not handling a stack overflow and its
good size is smaller than current size, shrink its stack */ size is larger than maximum "reasonable" size, shrink it */
if (inuse <= (LUAI_MAXSTACK - EXTRA_STACK) && goodsize < L->stacksize) if (inuse <= LUAI_MAXSTACK && stacksize(L) > max)
luaD_reallocstack(L, goodsize, 0); /* ok if that fails */ luaD_reallocstack(L, nsize, 0); /* ok if that fails */
else /* don't change stack */ else /* don't change stack */
condmovestack(L,{},{}); /* (change only for debugging) */ condmovestack(L,{},{}); /* (change only for debugging) */
luaE_shrinkCI(L); /* shrink CI list */ luaE_shrinkCI(L); /* shrink CI list */
@ -348,7 +368,7 @@ static StkId rethook (lua_State *L, CallInfo *ci, StkId firstres, int nres) {
/* /*
** Check whether 'func' has a '__call' metafield. If so, put it in the ** Check whether 'func' has a '__call' metafield. If so, put it in the
** stack, below original 'func', so that 'luaD_call' can call it. Raise ** stack, below original 'func', so that 'luaD_precall' can call it. Raise
** an error if there is no '__call' metafield. ** an error if there is no '__call' metafield.
*/ */
void luaD_tryfuncTM (lua_State *L, StkId func) { void luaD_tryfuncTM (lua_State *L, StkId func) {
@ -449,12 +469,14 @@ void luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, int narg1) {
/* /*
** Call a function (C or Lua). The function to be called is at *func. ** Prepares the call to a function (C or Lua). For C functions, also do
** The arguments are on the stack, right after the function. ** the call. The function to be called is at '*func'. The arguments
** When returns, all the results are on the stack, starting at the original ** are on the stack, right after the function. Returns the CallInfo
** function position. ** to be executed, if it was a Lua function. Otherwise (a C function)
** returns NULL, with all the results on the stack, starting at the
** original function position.
*/ */
void luaD_call (lua_State *L, StkId func, int nresults) { CallInfo *luaD_precall (lua_State *L, StkId func, int nresults) {
lua_CFunction f; lua_CFunction f;
retry: retry:
switch (ttypetag(s2v(func))) { switch (ttypetag(s2v(func))) {
@ -482,7 +504,7 @@ void luaD_call (lua_State *L, StkId func, int nresults) {
lua_lock(L); lua_lock(L);
api_checknelems(L, n); api_checknelems(L, n);
luaD_poscall(L, ci, n); luaD_poscall(L, ci, n);
break; return NULL;
} }
case LUA_VLCL: { /* Lua function */ case LUA_VLCL: { /* Lua function */
CallInfo *ci; CallInfo *ci;
@ -494,15 +516,13 @@ void luaD_call (lua_State *L, StkId func, int nresults) {
L->ci = ci = next_ci(L); L->ci = ci = next_ci(L);
ci->nresults = nresults; ci->nresults = nresults;
ci->u.l.savedpc = p->code; /* starting point */ ci->u.l.savedpc = p->code; /* starting point */
ci->callstatus = 0;
ci->top = func + 1 + fsize; ci->top = func + 1 + fsize;
ci->func = func; ci->func = func;
L->ci = ci; L->ci = ci;
for (; narg < nfixparams; narg++) for (; narg < nfixparams; narg++)
setnilvalue(s2v(L->top++)); /* complete missing arguments */ setnilvalue(s2v(L->top++)); /* complete missing arguments */
lua_assert(ci->top <= L->stack_last); lua_assert(ci->top <= L->stack_last);
luaV_execute(L, ci); /* run the function */ return ci;
break;
} }
default: { /* not a function */ default: { /* not a function */
checkstackGCp(L, 1, func); /* space for metamethod */ checkstackGCp(L, 1, func); /* space for metamethod */
@ -513,17 +533,37 @@ void luaD_call (lua_State *L, StkId func, int nresults) {
} }
/*
** Call a function (C or Lua) through C. 'inc' can be 1 (increment
** number of recursive invocations in the C stack) or nyci (the same
** plus increment number of non-yieldable calls).
*/
static void ccall (lua_State *L, StkId func, int nResults, int inc) {
CallInfo *ci;
L->nCcalls += inc;
if (unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
luaE_checkcstack(L);
if ((ci = luaD_precall(L, func, nResults)) != NULL) { /* Lua function? */
ci->callstatus = CIST_FRESH; /* mark that it is a "fresh" execute */
luaV_execute(L, ci); /* call it */
}
L->nCcalls -= inc;
}
/*
** External interface for 'ccall'
*/
void luaD_call (lua_State *L, StkId func, int nResults) {
ccall(L, func, nResults, 1);
}
/* /*
** Similar to 'luaD_call', but does not allow yields during the call. ** Similar to 'luaD_call', but does not allow yields during the call.
*/ */
void luaD_callnoyield (lua_State *L, StkId func, int nResults) { void luaD_callnoyield (lua_State *L, StkId func, int nResults) {
incXCcalls(L); ccall(L, func, nResults, nyci);
if (getCcalls(L) <= CSTACKERR) { /* possible C stack overflow? */
luaE_exitCcall(L); /* to compensate decrement in next call */
luaE_enterCcall(L); /* check properly */
}
luaD_call(L, func, nResults);
decXCcalls(L);
} }
@ -601,12 +641,12 @@ static int recover (lua_State *L, int status) {
if (ci == NULL) return 0; /* no recovery point */ if (ci == NULL) return 0; /* no recovery point */
/* "finish" luaD_pcall */ /* "finish" luaD_pcall */
oldtop = restorestack(L, ci->u2.funcidx); oldtop = restorestack(L, ci->u2.funcidx);
luaF_close(L, oldtop, status); /* may change the stack */
oldtop = restorestack(L, ci->u2.funcidx);
luaD_seterrorobj(L, status, oldtop);
L->ci = ci; L->ci = ci;
L->allowhook = getoah(ci->callstatus); /* restore original 'allowhook' */ L->allowhook = getoah(ci->callstatus); /* restore original 'allowhook' */
luaD_shrinkstack(L); status = luaF_close(L, oldtop, status); /* may change the stack */
oldtop = restorestack(L, ci->u2.funcidx);
luaD_seterrorobj(L, status, oldtop);
luaD_shrinkstack(L); /* restore stack size in case of overflow */
L->errfunc = ci->u.c.old_errfunc; L->errfunc = ci->u.c.old_errfunc;
return 1; /* continue running the coroutine */ return 1; /* continue running the coroutine */
} }
@ -637,12 +677,12 @@ static void resume (lua_State *L, void *ud) {
int n = *(cast(int*, ud)); /* number of arguments */ int n = *(cast(int*, ud)); /* number of arguments */
StkId firstArg = L->top - n; /* first argument */ StkId firstArg = L->top - n; /* first argument */
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
if (L->status == LUA_OK) { /* starting a coroutine? */ if (L->status == LUA_OK) /* starting a coroutine? */
luaD_call(L, firstArg - 1, LUA_MULTRET); ccall(L, firstArg - 1, LUA_MULTRET, 1); /* just call its body */
}
else { /* resuming from previous yield */ else { /* resuming from previous yield */
lua_assert(L->status == LUA_YIELD); lua_assert(L->status == LUA_YIELD);
L->status = LUA_OK; /* mark that it is running (again) */ L->status = LUA_OK; /* mark that it is running (again) */
luaE_incCstack(L); /* control the C stack */
if (isLua(ci)) /* yielded inside a hook? */ if (isLua(ci)) /* yielded inside a hook? */
luaV_execute(L, ci); /* just continue running Lua code */ luaV_execute(L, ci); /* just continue running Lua code */
else { /* 'common' yield */ else { /* 'common' yield */
@ -670,12 +710,7 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs,
} }
else if (L->status != LUA_YIELD) /* ended with errors? */ else if (L->status != LUA_YIELD) /* ended with errors? */
return resume_error(L, "cannot resume dead coroutine", nargs); return resume_error(L, "cannot resume dead coroutine", nargs);
if (from == NULL) L->nCcalls = (from) ? getCcalls(from) : 0;
L->nCcalls = CSTACKTHREAD;
else /* correct 'nCcalls' for this thread */
L->nCcalls = getCcalls(from) - L->nci - CSTACKCF;
if (L->nCcalls <= CSTACKERR)
return resume_error(L, "C stack overflow", nargs);
luai_userstateresume(L, nargs); luai_userstateresume(L, nargs);
api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs); api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
status = luaD_rawrunprotected(L, resume, &nargs); status = luaD_rawrunprotected(L, resume, &nargs);
@ -754,7 +789,7 @@ int luaD_pcall (lua_State *L, Pfunc func, void *u,
status = luaF_close(L, oldtop, status); status = luaF_close(L, oldtop, status);
oldtop = restorestack(L, old_top); /* previous call may change stack */ oldtop = restorestack(L, old_top); /* previous call may change stack */
luaD_seterrorobj(L, status, oldtop); luaD_seterrorobj(L, status, oldtop);
luaD_shrinkstack(L); luaD_shrinkstack(L); /* restore stack size in case of overflow */
} }
L->errfunc = old_errfunc; L->errfunc = old_errfunc;
return status; return status;

View file

@ -59,6 +59,7 @@ LUAI_FUNC void luaD_hook (lua_State *L, int event, int line,
int fTransfer, int nTransfer); int fTransfer, int nTransfer);
LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci); LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci);
LUAI_FUNC void luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, int n); LUAI_FUNC void luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, int n);
LUAI_FUNC CallInfo *luaD_precall (lua_State *L, StkId func, int nResults);
LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults); LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults);
LUAI_FUNC void luaD_tryfuncTM (lua_State *L, StkId func); LUAI_FUNC void luaD_tryfuncTM (lua_State *L, StkId func);

View file

@ -53,7 +53,7 @@ void luaF_initupvals (lua_State *L, LClosure *cl) {
uv->v = &uv->u.value; /* make it closed */ uv->v = &uv->u.value; /* make it closed */
setnilvalue(uv->v); setnilvalue(uv->v);
cl->upvals[i] = uv; cl->upvals[i] = uv;
luaC_objbarrier(L, cl, o); luaC_objbarrier(L, cl, uv);
} }
} }

View file

@ -161,18 +161,17 @@ static void linkgclist_ (GCObject *o, GCObject **pnext, GCObject **list) {
/* /*
** Clear keys for empty entries in tables. If entry is empty ** Clear keys for empty entries in tables. If entry is empty, mark its
** and its key is not marked, mark its entry as dead. This allows the ** entry as dead. This allows the collection of the key, but keeps its
** collection of the key, but keeps its entry in the table (its removal ** entry in the table: its removal could break a chain and could break
** could break a chain). The main feature of a dead key is that it must ** a table traversal. Other places never manipulate dead keys, because
** be different from any other value, to do not disturb searches. ** its associated empty value is enough to signal that the entry is
** Other places never manipulate dead keys, because its associated empty ** logically empty.
** value is enough to signal that the entry is logically empty.
*/ */
static void clearkey (Node *n) { static void clearkey (Node *n) {
lua_assert(isempty(gval(n))); lua_assert(isempty(gval(n)));
if (keyiswhite(n)) if (keyiscollectable(n))
setdeadkey(n); /* unused and unmarked key; remove it */ setdeadkey(n); /* unused key; remove it */
} }
@ -301,7 +300,7 @@ static void reallymarkobject (global_State *g, GCObject *o) {
if (upisopen(uv)) if (upisopen(uv))
set2gray(uv); /* open upvalues are kept gray */ set2gray(uv); /* open upvalues are kept gray */
else else
set2black(o); /* closed upvalues are visited here */ set2black(uv); /* closed upvalues are visited here */
markvalue(g, uv->v); /* mark its content */ markvalue(g, uv->v); /* mark its content */
break; break;
} }
@ -309,7 +308,7 @@ static void reallymarkobject (global_State *g, GCObject *o) {
Udata *u = gco2u(o); Udata *u = gco2u(o);
if (u->nuvalue == 0) { /* no user values? */ if (u->nuvalue == 0) { /* no user values? */
markobjectN(g, u->metatable); /* mark its metatable */ markobjectN(g, u->metatable); /* mark its metatable */
set2black(o); /* nothing else to mark */ set2black(u); /* nothing else to mark */
break; break;
} }
/* else... */ /* else... */
@ -633,9 +632,8 @@ static int traversethread (global_State *g, lua_State *th) {
for (uv = th->openupval; uv != NULL; uv = uv->u.open.next) for (uv = th->openupval; uv != NULL; uv = uv->u.open.next)
markobject(g, uv); /* open upvalues cannot be collected */ markobject(g, uv); /* open upvalues cannot be collected */
if (g->gcstate == GCSatomic) { /* final traversal? */ if (g->gcstate == GCSatomic) { /* final traversal? */
StkId lim = th->stack + th->stacksize; /* real end of stack */ for (; o < th->stack_last + EXTRA_STACK; o++)
for (; o < lim; o++) /* clear not-marked stack slice */ setnilvalue(s2v(o)); /* clear dead stack slice */
setnilvalue(s2v(o));
/* 'remarkupvals' may have removed thread from 'twups' list */ /* 'remarkupvals' may have removed thread from 'twups' list */
if (!isintwups(th) && th->openupval != NULL) { if (!isintwups(th) && th->openupval != NULL) {
th->twups = g->twups; /* link it back to the list */ th->twups = g->twups; /* link it back to the list */
@ -644,7 +642,7 @@ static int traversethread (global_State *g, lua_State *th) {
} }
else if (!g->gcemergency) else if (!g->gcemergency)
luaD_shrinkstack(th); /* do not change stack in emergency cycle */ luaD_shrinkstack(th); /* do not change stack in emergency cycle */
return 1 + th->stacksize; return 1 + stacksize(th);
} }
@ -771,12 +769,16 @@ static void freeobj (lua_State *L, GCObject *o) {
case LUA_VUPVAL: case LUA_VUPVAL:
freeupval(L, gco2upv(o)); freeupval(L, gco2upv(o));
break; break;
case LUA_VLCL: case LUA_VLCL: {
luaM_freemem(L, o, sizeLclosure(gco2lcl(o)->nupvalues)); LClosure *cl = gco2lcl(o);
luaM_freemem(L, cl, sizeLclosure(cl->nupvalues));
break; break;
case LUA_VCCL: }
luaM_freemem(L, o, sizeCclosure(gco2ccl(o)->nupvalues)); case LUA_VCCL: {
CClosure *cl = gco2ccl(o);
luaM_freemem(L, cl, sizeCclosure(cl->nupvalues));
break; break;
}
case LUA_VTABLE: case LUA_VTABLE:
luaH_free(L, gco2t(o)); luaH_free(L, gco2t(o));
break; break;
@ -788,13 +790,17 @@ static void freeobj (lua_State *L, GCObject *o) {
luaM_freemem(L, o, sizeudata(u->nuvalue, u->len)); luaM_freemem(L, o, sizeudata(u->nuvalue, u->len));
break; break;
} }
case LUA_VSHRSTR: case LUA_VSHRSTR: {
luaS_remove(L, gco2ts(o)); /* remove it from hash table */ TString *ts = gco2ts(o);
luaM_freemem(L, o, sizelstring(gco2ts(o)->shrlen)); luaS_remove(L, ts); /* remove it from hash table */
luaM_freemem(L, ts, sizelstring(ts->shrlen));
break; break;
case LUA_VLNGSTR: }
luaM_freemem(L, o, sizelstring(gco2ts(o)->u.lnglen)); case LUA_VLNGSTR: {
TString *ts = gco2ts(o);
luaM_freemem(L, ts, sizelstring(ts->u.lnglen));
break; break;
}
default: lua_assert(0); default: lua_assert(0);
} }
} }

View file

@ -254,9 +254,10 @@ static int read_numeral (LexState *ls, SemInfo *seminfo) {
/* /*
** reads a sequence '[=*[' or ']=*]', leaving the last bracket. ** read a sequence '[=*[' or ']=*]', leaving the last bracket. If
** If sequence is well formed, return its number of '='s + 2; otherwise, ** sequence is well formed, return its number of '='s + 2; otherwise,
** return 1 if there is no '='s or 0 otherwise (an unfinished '[==...'). ** return 1 if it is a single bracket (no '='s and no 2nd bracket);
** otherwise (an unfinished '[==...') return 0.
*/ */
static size_t skip_sep (LexState *ls) { static size_t skip_sep (LexState *ls) {
size_t count = 0; size_t count = 0;
@ -481,34 +482,34 @@ static int llex (LexState *ls, SemInfo *seminfo) {
} }
case '=': { case '=': {
next(ls); next(ls);
if (check_next1(ls, '=')) return TK_EQ; if (check_next1(ls, '=')) return TK_EQ; /* '==' */
else return '='; else return '=';
} }
case '<': { case '<': {
next(ls); next(ls);
if (check_next1(ls, '=')) return TK_LE; if (check_next1(ls, '=')) return TK_LE; /* '<=' */
else if (check_next1(ls, '<')) return TK_SHL; else if (check_next1(ls, '<')) return TK_SHL; /* '<<' */
else return '<'; else return '<';
} }
case '>': { case '>': {
next(ls); next(ls);
if (check_next1(ls, '=')) return TK_GE; if (check_next1(ls, '=')) return TK_GE; /* '>=' */
else if (check_next1(ls, '>')) return TK_SHR; else if (check_next1(ls, '>')) return TK_SHR; /* '>>' */
else return '>'; else return '>';
} }
case '/': { case '/': {
next(ls); next(ls);
if (check_next1(ls, '/')) return TK_IDIV; if (check_next1(ls, '/')) return TK_IDIV; /* '//' */
else return '/'; else return '/';
} }
case '~': { case '~': {
next(ls); next(ls);
if (check_next1(ls, '=')) return TK_NE; if (check_next1(ls, '=')) return TK_NE; /* '~=' */
else return '~'; else return '~';
} }
case ':': { case ':': {
next(ls); next(ls);
if (check_next1(ls, ':')) return TK_DBCOLON; if (check_next1(ls, ':')) return TK_DBCOLON; /* '::' */
else return ':'; else return ':';
} }
case '"': case '\'': { /* short literal strings */ case '"': case '\'': { /* short literal strings */
@ -547,7 +548,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
return TK_NAME; return TK_NAME;
} }
} }
else { /* single-char tokens (+ - / ...) */ else { /* single-char tokens ('+', '*', '%', '{', '}', ...) */
int c = ls->current; int c = ls->current;
next(ls); next(ls);
return c; return c;

View file

@ -234,6 +234,17 @@ typedef l_uint32 Instruction;
#endif #endif
/*
** Maximum depth for nested C calls, syntactical nested non-terminals,
** and other features implemented through recursion in C. (Value must
** fit in a 16-bit unsigned integer. It must also be compatible with
** the size of the C stack.)
*/
#if !defined(LUAI_MAXCCALLS)
#define LUAI_MAXCCALLS 200
#endif
/* /*
** macros that are executed whenever program enters the Lua core ** macros that are executed whenever program enters the Lua core
** ('lua_lock') and leaves the core ('lua_unlock') ** ('lua_lock') and leaves the core ('lua_unlock')
@ -315,7 +326,8 @@ typedef l_uint32 Instruction;
/* exponentiation */ /* exponentiation */
#if !defined(luai_numpow) #if !defined(luai_numpow)
#define luai_numpow(L,a,b) ((void)L, l_mathop(pow)(a,b)) #define luai_numpow(L,a,b) \
((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b))
#endif #endif
/* the others are quite standard operations */ /* the others are quite standard operations */
@ -344,7 +356,7 @@ typedef l_uint32 Instruction;
#else #else
/* realloc stack keeping its size */ /* realloc stack keeping its size */
#define condmovestack(L,pre,pos) \ #define condmovestack(L,pre,pos) \
{ int sz_ = (L)->stacksize; pre; luaD_reallocstack((L), sz_, 0); pos; } { int sz_ = stacksize(L); pre; luaD_reallocstack((L), sz_, 0); pos; }
#endif #endif
#if !defined(HARDMEMTESTS) #if !defined(HARDMEMTESTS)

View file

@ -258,7 +258,7 @@ static const char *l_str2d (const char *s, lua_Number *result) {
if (endptr == NULL) { /* failed? may be a different locale */ if (endptr == NULL) { /* failed? may be a different locale */
char buff[L_MAXLENNUM + 1]; char buff[L_MAXLENNUM + 1];
const char *pdot = strchr(s, '.'); const char *pdot = strchr(s, '.');
if (strlen(s) > L_MAXLENNUM || pdot == NULL) if (pdot == NULL || strlen(s) > L_MAXLENNUM)
return NULL; /* string too long or no dot; fail */ return NULL; /* string too long or no dot; fail */
strcpy(buff, s); /* copy string to buffer */ strcpy(buff, s); /* copy string to buffer */
buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */ buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */

View file

@ -21,10 +21,12 @@
*/ */
#define LUA_TUPVAL LUA_NUMTYPES /* upvalues */ #define LUA_TUPVAL LUA_NUMTYPES /* upvalues */
#define LUA_TPROTO (LUA_NUMTYPES+1) /* function prototypes */ #define LUA_TPROTO (LUA_NUMTYPES+1) /* function prototypes */
#define LUA_TDEADKEY (LUA_NUMTYPES+2) /* removed keys in tables */
/* /*
** number of all possible types (including LUA_TNONE) ** number of all possible types (including LUA_TNONE but excluding DEADKEY)
*/ */
#define LUA_TOTALTYPES (LUA_TPROTO + 2) #define LUA_TOTALTYPES (LUA_TPROTO + 2)
@ -555,7 +557,7 @@ typedef struct Proto {
/* /*
** {================================================================== ** {==================================================================
** Closures ** Functions
** =================================================================== ** ===================================================================
*/ */
@ -743,13 +745,13 @@ typedef struct Table {
/* /*
** Use a "nil table" to mark dead keys in a table. Those keys serve ** Dead keys in tables have the tag DEADKEY but keep their original
** to keep space for removed entries, which may still be part of ** gcvalue. This distinguishes them from regular keys but allows them to
** chains. Note that the 'keytt' does not have the BIT_ISCOLLECTABLE ** be found when searched in a special way. ('next' needs that to find
** set, so these values are considered not collectable and are different ** keys removed from a table during a traversal.)
** from any valid value.
*/ */
#define setdeadkey(n) (keytt(n) = LUA_TTABLE, gckey(n) = NULL) #define setdeadkey(node) (keytt(node) = LUA_TDEADKEY)
#define keyisdead(node) (keytt(node) == LUA_TDEADKEY)
/* }================================================================== */ /* }================================================================== */

View file

@ -261,7 +261,7 @@ OP_MMBINK,/* A B C k call C metamethod over R[A] and K[B] */
OP_UNM,/* A B R[A] := -R[B] */ OP_UNM,/* A B R[A] := -R[B] */
OP_BNOT,/* A B R[A] := ~R[B] */ OP_BNOT,/* A B R[A] := ~R[B] */
OP_NOT,/* A B R[A] := not R[B] */ OP_NOT,/* A B R[A] := not R[B] */
OP_LEN,/* A B R[A] := length of R[B] */ OP_LEN,/* A B R[A] := #R[B] (length operator) */
OP_CONCAT,/* A B R[A] := R[A].. ... ..R[A + B - 1] */ OP_CONCAT,/* A B R[A] := R[A].. ... ..R[A + B - 1] */
@ -297,7 +297,7 @@ OP_TFORPREP,/* A Bx create upvalue for R[A + 3]; pc+=Bx */
OP_TFORCALL,/* A C R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]); */ OP_TFORCALL,/* A C R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]); */
OP_TFORLOOP,/* A Bx if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx } */ OP_TFORLOOP,/* A Bx if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx } */
OP_SETLIST,/* A B C k R[A][(C-1)*FPF+i] := R[A+i], 1 <= i <= B */ OP_SETLIST,/* A B C k R[A][C+i] := R[A+i], 1 <= i <= B */
OP_CLOSURE,/* A Bx R[A] := closure(KPROTO[Bx]) */ OP_CLOSURE,/* A Bx R[A] := closure(KPROTO[Bx]) */

View file

@ -489,12 +489,10 @@ static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {
} }
/* #define enterlevel(ls) luaE_incCstack(ls->L)
** Macros to limit the maximum recursion depth while parsing
*/
#define enterlevel(ls) luaE_enterCcall((ls)->L)
#define leavelevel(ls) luaE_exitCcall((ls)->L)
#define leavelevel(ls) ((ls)->L->nCcalls--)
/* /*
@ -947,7 +945,7 @@ static void setvararg (FuncState *fs, int nparams) {
static void parlist (LexState *ls) { static void parlist (LexState *ls) {
/* parlist -> [ param { ',' param } ] */ /* parlist -> [ {NAME ','} (NAME | '...') ] */
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
Proto *f = fs->f; Proto *f = fs->f;
int nparams = 0; int nparams = 0;
@ -955,12 +953,12 @@ static void parlist (LexState *ls) {
if (ls->t.token != ')') { /* is 'parlist' not empty? */ if (ls->t.token != ')') { /* is 'parlist' not empty? */
do { do {
switch (ls->t.token) { switch (ls->t.token) {
case TK_NAME: { /* param -> NAME */ case TK_NAME: {
new_localvar(ls, str_checkname(ls)); new_localvar(ls, str_checkname(ls));
nparams++; nparams++;
break; break;
} }
case TK_DOTS: { /* param -> '...' */ case TK_DOTS: {
luaX_next(ls); luaX_next(ls);
isvararg = 1; isvararg = 1;
break; break;
@ -1625,59 +1623,21 @@ static void forstat (LexState *ls, int line) {
} }
/*
** Check whether next instruction is a single jump (a 'break', a 'goto'
** to a forward label, or a 'goto' to a backward label with no variable
** to close). If so, set the name of the 'label' it is jumping to
** ("break" for a 'break') or to where it is jumping to ('target') and
** return true. If not a single jump, leave input unchanged, to be
** handled as a regular statement.
*/
static int issinglejump (LexState *ls, TString **label, int *target) {
if (testnext(ls, TK_BREAK)) { /* a break? */
*label = luaS_newliteral(ls->L, "break");
return 1;
}
else if (ls->t.token != TK_GOTO || luaX_lookahead(ls) != TK_NAME)
return 0; /* not a valid goto */
else {
TString *lname = ls->lookahead.seminfo.ts; /* label's id */
Labeldesc *lb = findlabel(ls, lname);
if (lb) { /* a backward jump? */
/* does it need to close variables? */
if (luaY_nvarstack(ls->fs) > stacklevel(ls->fs, lb->nactvar))
return 0; /* not a single jump; cannot optimize */
*target = lb->pc;
}
else /* jump forward */
*label = lname;
luaX_next(ls); /* skip goto */
luaX_next(ls); /* skip name */
return 1;
}
}
static void test_then_block (LexState *ls, int *escapelist) { static void test_then_block (LexState *ls, int *escapelist) {
/* test_then_block -> [IF | ELSEIF] cond THEN block */ /* test_then_block -> [IF | ELSEIF] cond THEN block */
BlockCnt bl; BlockCnt bl;
int line;
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
TString *jlb = NULL;
int target = NO_JUMP;
expdesc v; expdesc v;
int jf; /* instruction to skip 'then' code (if condition is false) */ int jf; /* instruction to skip 'then' code (if condition is false) */
luaX_next(ls); /* skip IF or ELSEIF */ luaX_next(ls); /* skip IF or ELSEIF */
expr(ls, &v); /* read condition */ expr(ls, &v); /* read condition */
checknext(ls, TK_THEN); checknext(ls, TK_THEN);
line = ls->linenumber; if (ls->t.token == TK_BREAK) { /* 'if x then break' ? */
if (issinglejump(ls, &jlb, &target)) { /* 'if x then goto' ? */ int line = ls->linenumber;
luaK_goiffalse(ls->fs, &v); /* will jump to label if condition is true */ luaK_goiffalse(ls->fs, &v); /* will jump if condition is true */
luaX_next(ls); /* skip 'break' */
enterblock(fs, &bl, 0); /* must enter block before 'goto' */ enterblock(fs, &bl, 0); /* must enter block before 'goto' */
if (jlb != NULL) /* forward jump? */ newgotoentry(ls, luaS_newliteral(ls->L, "break"), line, v.t);
newgotoentry(ls, jlb, line, v.t); /* will be resolved later */
else /* backward jump */
luaK_patchlist(fs, v.t, target); /* jump directly to 'target' */
while (testnext(ls, ';')) {} /* skip semicolons */ while (testnext(ls, ';')) {} /* skip semicolons */
if (block_follow(ls, 0)) { /* jump is the entire block? */ if (block_follow(ls, 0)) { /* jump is the entire block? */
leaveblock(fs); leaveblock(fs);
@ -1686,7 +1646,7 @@ static void test_then_block (LexState *ls, int *escapelist) {
else /* must skip over 'then' part if condition is false */ else /* must skip over 'then' part if condition is false */
jf = luaK_jump(fs); jf = luaK_jump(fs);
} }
else { /* regular case (not a jump) */ else { /* regular case (not a break) */
luaK_goiftrue(ls->fs, &v); /* skip over block if condition is false */ luaK_goiftrue(ls->fs, &v); /* skip over block if condition is false */
enterblock(fs, &bl, 0); enterblock(fs, &bl, 0);
jf = v.f; jf = v.f;
@ -1754,7 +1714,7 @@ static void checktoclose (LexState *ls, int level) {
static void localstat (LexState *ls) { static void localstat (LexState *ls) {
/* stat -> LOCAL ATTRIB NAME {',' ATTRIB NAME} ['=' explist] */ /* stat -> LOCAL NAME ATTRIB { ',' NAME ATTRIB } ['=' explist] */
FuncState *fs = ls->fs; FuncState *fs = ls->fs;
int toclose = -1; /* index of to-be-closed variable (if any) */ int toclose = -1; /* index of to-be-closed variable (if any) */
Vardesc *var; /* last variable */ Vardesc *var; /* last variable */

View file

@ -23,7 +23,7 @@
/* kinds of variables/expressions */ /* kinds of variables/expressions */
typedef enum { typedef enum {
VVOID, /* when 'expdesc' describes the last expression a list, VVOID, /* when 'expdesc' describes the last expression of a list,
this kind means an empty list (so, no expression) */ this kind means an empty list (so, no expression) */
VNIL, /* constant nil */ VNIL, /* constant nil */
VTRUE, /* constant true */ VTRUE, /* constant true */
@ -38,7 +38,8 @@ typedef enum {
VLOCAL, /* local variable; var.sidx = stack index (local register); VLOCAL, /* local variable; var.sidx = stack index (local register);
var.vidx = relative index in 'actvar.arr' */ var.vidx = relative index in 'actvar.arr' */
VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */ VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */
VCONST, /* compile-time constant; info = absolute index in 'actvar.arr' */ VCONST, /* compile-time <const> variable;
info = absolute index in 'actvar.arr' */
VINDEXED, /* indexed variable; VINDEXED, /* indexed variable;
ind.t = table register; ind.t = table register;
ind.idx = key's R index */ ind.idx = key's R index */

View file

@ -76,7 +76,7 @@ static unsigned int luai_makeseed (lua_State *L) {
addbuff(buff, p, &h); /* local variable */ addbuff(buff, p, &h); /* local variable */
addbuff(buff, p, &lua_newstate); /* public function */ addbuff(buff, p, &lua_newstate); /* public function */
lua_assert(p == sizeof(buff)); lua_assert(p == sizeof(buff));
return luaS_hash(buff, p, h, 1); return luaS_hash(buff, p, h);
} }
#endif #endif
@ -97,66 +97,14 @@ void luaE_setdebt (global_State *g, l_mem debt) {
LUA_API int lua_setcstacklimit (lua_State *L, unsigned int limit) { LUA_API int lua_setcstacklimit (lua_State *L, unsigned int limit) {
global_State *g = G(L); UNUSED(L); UNUSED(limit);
int ccalls; return LUAI_MAXCCALLS; /* warning?? */
luaE_freeCI(L); /* release unused CIs */
ccalls = getCcalls(L);
if (limit >= 40000)
return 0; /* out of bounds */
limit += CSTACKERR;
if (L != g-> mainthread)
return 0; /* only main thread can change the C stack */
else if (ccalls <= CSTACKERR)
return 0; /* handling overflow */
else {
int diff = limit - g->Cstacklimit;
if (ccalls + diff <= CSTACKERR)
return 0; /* new limit would cause an overflow */
g->Cstacklimit = limit; /* set new limit */
L->nCcalls += diff; /* correct 'nCcalls' */
return limit - diff - CSTACKERR; /* success; return previous limit */
}
}
/*
** Decrement count of "C calls" and check for overflows. In case of
** a stack overflow, check appropriate error ("regular" overflow or
** overflow while handling stack overflow). If 'nCcalls' is smaller
** than CSTACKERR but larger than CSTACKMARK, it means it has just
** entered the "overflow zone", so the function raises an overflow
** error. If 'nCcalls' is smaller than CSTACKMARK (which means it is
** already handling an overflow) but larger than CSTACKERRMARK, does
** not report an error (to allow message handling to work). Otherwise,
** report a stack overflow while handling a stack overflow (probably
** caused by a repeating error in the message handling function).
*/
void luaE_enterCcall (lua_State *L) {
int ncalls = getCcalls(L);
L->nCcalls--;
if (ncalls <= CSTACKERR) { /* possible overflow? */
luaE_freeCI(L); /* release unused CIs */
ncalls = getCcalls(L); /* update call count */
if (ncalls <= CSTACKERR) { /* still overflow? */
if (ncalls <= CSTACKERRMARK) /* below error-handling zone? */
luaD_throw(L, LUA_ERRERR); /* error while handling stack error */
else if (ncalls >= CSTACKMARK) {
/* not in error-handling zone; raise the error now */
L->nCcalls = (CSTACKMARK - 1); /* enter error-handling zone */
luaG_runerror(L, "C stack overflow");
}
/* else stack is in the error-handling zone;
allow message handler to work */
}
}
} }
CallInfo *luaE_extendCI (lua_State *L) { CallInfo *luaE_extendCI (lua_State *L) {
CallInfo *ci; CallInfo *ci;
lua_assert(L->ci->next == NULL); lua_assert(L->ci->next == NULL);
luaE_enterCcall(L);
ci = luaM_new(L, CallInfo); ci = luaM_new(L, CallInfo);
lua_assert(L->ci->next == NULL); lua_assert(L->ci->next == NULL);
L->ci->next = ci; L->ci->next = ci;
@ -175,13 +123,11 @@ void luaE_freeCI (lua_State *L) {
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
CallInfo *next = ci->next; CallInfo *next = ci->next;
ci->next = NULL; ci->next = NULL;
L->nCcalls += L->nci; /* add removed elements back to 'nCcalls' */
while ((ci = next) != NULL) { while ((ci = next) != NULL) {
next = ci->next; next = ci->next;
luaM_free(L, ci); luaM_free(L, ci);
L->nci--; L->nci--;
} }
L->nCcalls -= L->nci; /* adjust result */
} }
@ -194,7 +140,6 @@ void luaE_shrinkCI (lua_State *L) {
CallInfo *next; CallInfo *next;
if (ci == NULL) if (ci == NULL)
return; /* no extra elements */ return; /* no extra elements */
L->nCcalls += L->nci; /* add removed elements back to 'nCcalls' */
while ((next = ci->next) != NULL) { /* two extra elements? */ while ((next = ci->next) != NULL) { /* two extra elements? */
CallInfo *next2 = next->next; /* next's next */ CallInfo *next2 = next->next; /* next's next */
ci->next = next2; /* remove next from the list */ ci->next = next2; /* remove next from the list */
@ -207,19 +152,39 @@ void luaE_shrinkCI (lua_State *L) {
ci = next2; /* continue */ ci = next2; /* continue */
} }
} }
L->nCcalls -= L->nci; /* adjust result */ }
/*
** Called when 'getCcalls(L)' larger or equal to LUAI_MAXCCALLS.
** If equal, raises an overflow error. If value is larger than
** LUAI_MAXCCALLS (which means it is handling an overflow) but
** not much larger, does not report an error (to allow overflow
** handling to work).
*/
void luaE_checkcstack (lua_State *L) {
if (getCcalls(L) == LUAI_MAXCCALLS)
luaG_runerror(L, "C stack overflow");
else if (getCcalls(L) >= (LUAI_MAXCCALLS / 10 * 11))
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
}
LUAI_FUNC void luaE_incCstack (lua_State *L) {
L->nCcalls++;
if (unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
luaE_checkcstack(L);
} }
static void stack_init (lua_State *L1, lua_State *L) { static void stack_init (lua_State *L1, lua_State *L) {
int i; CallInfo *ci; int i; CallInfo *ci;
/* initialize stack array */ /* initialize stack array */
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE, StackValue); L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue);
L1->stacksize = BASIC_STACK_SIZE; for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++)
for (i = 0; i < BASIC_STACK_SIZE; i++)
setnilvalue(s2v(L1->stack + i)); /* erase new stack */ setnilvalue(s2v(L1->stack + i)); /* erase new stack */
L1->top = L1->stack; L1->top = L1->stack;
L1->stack_last = L1->stack + L1->stacksize - EXTRA_STACK; L1->stack_last = L1->stack + BASIC_STACK_SIZE;
/* initialize first ci */ /* initialize first ci */
ci = &L1->base_ci; ci = &L1->base_ci;
ci->next = ci->previous = NULL; ci->next = ci->previous = NULL;
@ -240,7 +205,7 @@ static void freestack (lua_State *L) {
L->ci = &L->base_ci; /* free the entire 'ci' list */ L->ci = &L->base_ci; /* free the entire 'ci' list */
luaE_freeCI(L); luaE_freeCI(L);
lua_assert(L->nci == 0); lua_assert(L->nci == 0);
luaM_freearray(L, L->stack, L->stacksize); /* free stack array */ luaM_freearray(L, L->stack, stacksize(L) + EXTRA_STACK); /* free stack */
} }
@ -290,7 +255,6 @@ static void preinit_thread (lua_State *L, global_State *g) {
L->stack = NULL; L->stack = NULL;
L->ci = NULL; L->ci = NULL;
L->nci = 0; L->nci = 0;
L->stacksize = 0;
L->twups = L; /* thread has no upvalues */ L->twups = L; /* thread has no upvalues */
L->errorJmp = NULL; L->errorJmp = NULL;
L->hook = NULL; L->hook = NULL;
@ -335,7 +299,7 @@ LUA_API lua_State *lua_newthread (lua_State *L) {
setthvalue2s(L, L->top, L1); setthvalue2s(L, L->top, L1);
api_incr_top(L); api_incr_top(L);
preinit_thread(L1, g); preinit_thread(L1, g);
L1->nCcalls = getCcalls(L); L1->nCcalls = 0;
L1->hookmask = L->hookmask; L1->hookmask = L->hookmask;
L1->basehookcount = L->basehookcount; L1->basehookcount = L->basehookcount;
L1->hook = L->hook; L1->hook = L->hook;
@ -396,7 +360,7 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
preinit_thread(L, g); preinit_thread(L, g);
g->allgc = obj2gco(L); /* by now, only object is the main thread */ g->allgc = obj2gco(L); /* by now, only object is the main thread */
L->next = NULL; L->next = NULL;
g->Cstacklimit = L->nCcalls = LUAI_MAXCSTACK + CSTACKERR; L->nCcalls = 0;
incnny(L); /* main thread is always non yieldable */ incnny(L); /* main thread is always non yieldable */
g->frealloc = f; g->frealloc = f;
g->ud = ud; g->ud = ud;

View file

@ -87,49 +87,13 @@
/* /*
** About 'nCcalls': each thread in Lua (a lua_State) keeps a count of ** About 'nCcalls': This count has two parts: the lower 16 bits counts
** how many "C calls" it still can do in the C stack, to avoid C-stack ** the number of recursive invocations in the C stack; the higher
** overflow. This count is very rough approximation; it considers only ** 16 bits counts the number of non-yieldable calls in the stack.
** recursive functions inside the interpreter, as non-recursive calls ** (They are together so that we can change and save both with one
** can be considered using a fixed (although unknown) amount of stack ** instruction.)
** space.
**
** The count has two parts: the lower part is the count itself; the
** higher part counts the number of non-yieldable calls in the stack.
** (They are together so that we can change both with one instruction.)
**
** Because calls to external C functions can use an unknown amount
** of space (e.g., functions using an auxiliary buffer), calls
** to these functions add more than one to the count (see CSTACKCF).
**
** The proper count excludes the number of CallInfo structures allocated
** by Lua, as a kind of "potential" calls. So, when Lua calls a function
** (and "consumes" one CallInfo), it needs neither to decrement nor to
** check 'nCcalls', as its use of C stack is already accounted for.
*/ */
/* number of "C stack slots" used by an external C function */
#define CSTACKCF 10
/*
** The C-stack size is sliced in the following zones:
** - larger than CSTACKERR: normal stack;
** - [CSTACKMARK, CSTACKERR]: buffer zone to signal a stack overflow;
** - [CSTACKCF, CSTACKERRMARK]: error-handling zone;
** - below CSTACKERRMARK: buffer zone to signal overflow during overflow;
** (Because the counter can be decremented CSTACKCF at once, we need
** the so called "buffer zones", with at least that size, to properly
** detect a change from one zone to the next.)
*/
#define CSTACKERR (8 * CSTACKCF)
#define CSTACKMARK (CSTACKERR - (CSTACKCF + 2))
#define CSTACKERRMARK (CSTACKCF + 2)
/* initial limit for the C-stack of threads */
#define CSTACKTHREAD (2 * CSTACKERR)
/* true if this thread does not have non-yieldable calls in the stack */ /* true if this thread does not have non-yieldable calls in the stack */
#define yieldable(L) (((L)->nCcalls & 0xffff0000) == 0) #define yieldable(L) (((L)->nCcalls & 0xffff0000) == 0)
@ -144,13 +108,8 @@
/* Decrement the number of non-yieldable calls */ /* Decrement the number of non-yieldable calls */
#define decnny(L) ((L)->nCcalls -= 0x10000) #define decnny(L) ((L)->nCcalls -= 0x10000)
/* Increment the number of non-yieldable calls and decrement nCcalls */ /* Non-yieldable call increment */
#define incXCcalls(L) ((L)->nCcalls += 0x10000 - CSTACKCF) #define nyci (0x10000 | 1)
/* Decrement the number of non-yieldable calls and increment nCcalls */
#define decXCcalls(L) ((L)->nCcalls -= 0x10000 - CSTACKCF)
@ -168,12 +127,20 @@ struct lua_longjmp; /* defined in ldo.c */
#endif #endif
/* extra stack space to handle TM calls and some other extras */ /*
** Extra stack space to handle TM calls and some other extras. This
** space is not included in 'stack_last'. It is used only to avoid stack
** checks, either because the element will be promptly popped or because
** there will be a stack check soon after the push. Function frames
** never use this extra space, so it does not need to be kept clean.
*/
#define EXTRA_STACK 5 #define EXTRA_STACK 5
#define BASIC_STACK_SIZE (2*LUA_MINSTACK) #define BASIC_STACK_SIZE (2*LUA_MINSTACK)
#define stacksize(th) cast_int((th)->stack_last - (th)->stack)
/* kinds of Garbage Collection */ /* kinds of Garbage Collection */
#define KGC_INC 0 /* incremental gc */ #define KGC_INC 0 /* incremental gc */
@ -224,14 +191,15 @@ typedef struct CallInfo {
*/ */
#define CIST_OAH (1<<0) /* original value of 'allowhook' */ #define CIST_OAH (1<<0) /* original value of 'allowhook' */
#define CIST_C (1<<1) /* call is running a C function */ #define CIST_C (1<<1) /* call is running a C function */
#define CIST_HOOKED (1<<2) /* call is running a debug hook */ #define CIST_FRESH (1<<2) /* call is on a fresh "luaV_execute" frame */
#define CIST_YPCALL (1<<3) /* call is a yieldable protected call */ #define CIST_HOOKED (1<<3) /* call is running a debug hook */
#define CIST_TAIL (1<<4) /* call was tail called */ #define CIST_YPCALL (1<<4) /* call is a yieldable protected call */
#define CIST_HOOKYIELD (1<<5) /* last hook called yielded */ #define CIST_TAIL (1<<5) /* call was tail called */
#define CIST_FIN (1<<6) /* call is running a finalizer */ #define CIST_HOOKYIELD (1<<6) /* last hook called yielded */
#define CIST_TRAN (1<<7) /* 'ci' has transfer information */ #define CIST_FIN (1<<7) /* call is running a finalizer */
#define CIST_TRAN (1<<8) /* 'ci' has transfer information */
#if defined(LUA_COMPAT_LT_LE) #if defined(LUA_COMPAT_LT_LE)
#define CIST_LEQ (1<<8) /* using __lt for __le */ #define CIST_LEQ (1<<9) /* using __lt for __le */
#endif #endif
/* active function is a Lua function */ /* active function is a Lua function */
@ -296,7 +264,6 @@ typedef struct global_State {
TString *strcache[STRCACHE_N][STRCACHE_M]; /* cache for strings in API */ TString *strcache[STRCACHE_N][STRCACHE_M]; /* cache for strings in API */
lua_WarnFunction warnf; /* warning function */ lua_WarnFunction warnf; /* warning function */
void *ud_warn; /* auxiliary data to 'warnf' */ void *ud_warn; /* auxiliary data to 'warnf' */
unsigned int Cstacklimit; /* current limit for the C stack */
} global_State; } global_State;
@ -311,7 +278,7 @@ struct lua_State {
StkId top; /* first free slot in the stack */ StkId top; /* first free slot in the stack */
global_State *l_G; global_State *l_G;
CallInfo *ci; /* call info for current function */ CallInfo *ci; /* call info for current function */
StkId stack_last; /* last free slot in the stack */ StkId stack_last; /* end of stack (last element + 1) */
StkId stack; /* stack base */ StkId stack; /* stack base */
UpVal *openupval; /* list of open upvalues in this stack */ UpVal *openupval; /* list of open upvalues in this stack */
GCObject *gclist; GCObject *gclist;
@ -320,9 +287,8 @@ struct lua_State {
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */ CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
volatile lua_Hook hook; volatile lua_Hook hook;
ptrdiff_t errfunc; /* current error handling function (stack index) */ ptrdiff_t errfunc; /* current error handling function (stack index) */
l_uint32 nCcalls; /* number of allowed nested C calls - 'nci' */ l_uint32 nCcalls; /* number of nested (non-yieldable | C) calls */
int oldpc; /* last pc traced */ int oldpc; /* last pc traced */
int stacksize;
int basehookcount; int basehookcount;
int hookcount; int hookcount;
volatile l_signalT hookmask; volatile l_signalT hookmask;
@ -389,12 +355,11 @@ LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L); LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
LUAI_FUNC void luaE_freeCI (lua_State *L); LUAI_FUNC void luaE_freeCI (lua_State *L);
LUAI_FUNC void luaE_shrinkCI (lua_State *L); LUAI_FUNC void luaE_shrinkCI (lua_State *L);
LUAI_FUNC void luaE_enterCcall (lua_State *L); LUAI_FUNC void luaE_checkcstack (lua_State *L);
LUAI_FUNC void luaE_incCstack (lua_State *L);
LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont); LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont);
LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where); LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where);
#define luaE_exitCcall(L) ((L)->nCcalls++)
#endif #endif

View file

@ -22,16 +22,6 @@
#include "lstring.h" #include "lstring.h"
/*
** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a long string to
** compute its hash
*/
#if !defined(LUAI_HASHLIMIT)
#define LUAI_HASHLIMIT 5
#endif
/* /*
** Maximum size for string table. ** Maximum size for string table.
*/ */
@ -50,10 +40,9 @@ int luaS_eqlngstr (TString *a, TString *b) {
} }
unsigned int luaS_hash (const char *str, size_t l, unsigned int seed, unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
size_t step) {
unsigned int h = seed ^ cast_uint(l); unsigned int h = seed ^ cast_uint(l);
for (; l >= step; l -= step) for (; l > 0; l--)
h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1])); h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
return h; return h;
} }
@ -63,8 +52,7 @@ unsigned int luaS_hashlongstr (TString *ts) {
lua_assert(ts->tt == LUA_VLNGSTR); lua_assert(ts->tt == LUA_VLNGSTR);
if (ts->extra == 0) { /* no hash? */ if (ts->extra == 0) { /* no hash? */
size_t len = ts->u.lnglen; size_t len = ts->u.lnglen;
size_t step = (len >> LUAI_HASHLIMIT) + 1; ts->hash = luaS_hash(getstr(ts), len, ts->hash);
ts->hash = luaS_hash(getstr(ts), len, ts->hash, step);
ts->extra = 1; /* now it has its hash */ ts->extra = 1; /* now it has its hash */
} }
return ts->hash; return ts->hash;
@ -201,7 +189,7 @@ static TString *internshrstr (lua_State *L, const char *str, size_t l) {
TString *ts; TString *ts;
global_State *g = G(L); global_State *g = G(L);
stringtable *tb = &g->strt; stringtable *tb = &g->strt;
unsigned int h = luaS_hash(str, l, g->seed, 1); unsigned int h = luaS_hash(str, l, g->seed);
TString **list = &tb->hash[lmod(h, tb->size)]; TString **list = &tb->hash[lmod(h, tb->size)];
lua_assert(str != NULL); /* otherwise 'memcmp'/'memcpy' are undefined */ lua_assert(str != NULL); /* otherwise 'memcmp'/'memcpy' are undefined */
for (ts = *list; ts != NULL; ts = ts->u.hnext) { for (ts = *list; ts != NULL; ts = ts->u.hnext) {

View file

@ -41,8 +41,7 @@
#define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b)) #define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
unsigned int seed, size_t step);
LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts); LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b); LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
LUAI_FUNC void luaS_resize (lua_State *L, int newsize); LUAI_FUNC void luaS_resize (lua_State *L, int newsize);

View file

@ -1365,7 +1365,6 @@ typedef union Ftypes {
float f; float f;
double d; double d;
lua_Number n; lua_Number n;
char buff[5 * sizeof(lua_Number)]; /* enough for any float type */
} Ftypes; } Ftypes;
@ -1535,12 +1534,10 @@ static void packint (luaL_Buffer *b, lua_Unsigned n,
** Copy 'size' bytes from 'src' to 'dest', correcting endianness if ** Copy 'size' bytes from 'src' to 'dest', correcting endianness if
** given 'islittle' is different from native endianness. ** given 'islittle' is different from native endianness.
*/ */
static void copywithendian (volatile char *dest, volatile const char *src, static void copywithendian (char *dest, const char *src,
int size, int islittle) { int size, int islittle) {
if (islittle == nativeendian.little) { if (islittle == nativeendian.little)
while (size-- != 0) memcpy(dest, src, size);
*(dest++) = *(src++);
}
else { else {
dest += size - 1; dest += size - 1;
while (size-- != 0) while (size-- != 0)
@ -1584,14 +1581,14 @@ static int str_pack (lua_State *L) {
break; break;
} }
case Kfloat: { /* floating-point options */ case Kfloat: { /* floating-point options */
volatile Ftypes u; Ftypes u;
char *buff = luaL_prepbuffsize(&b, size); char *buff = luaL_prepbuffsize(&b, size);
lua_Number n = luaL_checknumber(L, arg); /* get argument */ lua_Number n = luaL_checknumber(L, arg); /* get argument */
if (size == sizeof(u.f)) u.f = (float)n; /* copy it into 'u' */ if (size == sizeof(u.f)) u.f = (float)n; /* copy it into 'u' */
else if (size == sizeof(u.d)) u.d = (double)n; else if (size == sizeof(u.d)) u.d = (double)n;
else u.n = n; else u.n = n;
/* move 'u' to final result, correcting endianness if needed */ /* move 'u' to final result, correcting endianness if needed */
copywithendian(buff, u.buff, size, h.islittle); copywithendian(buff, (char *)&u, size, h.islittle);
luaL_addsize(&b, size); luaL_addsize(&b, size);
break; break;
} }
@ -1717,9 +1714,9 @@ static int str_unpack (lua_State *L) {
break; break;
} }
case Kfloat: { case Kfloat: {
volatile Ftypes u; Ftypes u;
lua_Number num; lua_Number num;
copywithendian(u.buff, data + pos, size, h.islittle); copywithendian((char *)&u, data + pos, size, h.islittle);
if (size == sizeof(u.f)) num = (lua_Number)u.f; if (size == sizeof(u.f)) num = (lua_Number)u.f;
else if (size == sizeof(u.d)) num = (lua_Number)u.d; else if (size == sizeof(u.d)) num = (lua_Number)u.d;
else num = u.n; else num = u.n;
@ -1738,7 +1735,7 @@ static int str_unpack (lua_State *L) {
break; break;
} }
case Kzstr: { case Kzstr: {
size_t len = (int)strlen(data + pos); size_t len = strlen(data + pos);
luaL_argcheck(L, pos + len < ld, 2, luaL_argcheck(L, pos + len < ld, 2,
"unfinished string for format 'z'"); "unfinished string for format 'z'");
lua_pushlstring(L, data + pos, len); lua_pushlstring(L, data + pos, len);

View file

@ -166,17 +166,30 @@ static Node *mainpositionTV (const Table *t, const TValue *key) {
/* /*
** Check whether key 'k1' is equal to the key in node 'n2'. ** Check whether key 'k1' is equal to the key in node 'n2'. This
** This equality is raw, so there are no metamethods. Floats ** equality is raw, so there are no metamethods. Floats with integer
** with integer values have been normalized, so integers cannot ** values have been normalized, so integers cannot be equal to
** be equal to floats. It is assumed that 'eqshrstr' is simply ** floats. It is assumed that 'eqshrstr' is simply pointer equality, so
** pointer equality, so that short strings are handled in the ** that short strings are handled in the default case.
** default case. ** A true 'deadok' means to accept dead keys as equal to their original
** values. All dead keys are compared in the default case, by pointer
** identity. (Only collectable objects can produce dead keys.) Note that
** dead long strings are also compared by identity.
** Once a key is dead, its corresponding value may be collected, and
** then another value can be created with the same address. If this
** other value is given to 'next', 'equalkey' will signal a false
** positive. In a regular traversal, this situation should never happen,
** as all keys given to 'next' came from the table itself, and therefore
** could not have been collected. Outside a regular traversal, we
** have garbage in, garbage out. What is relevant is that this false
** positive does not break anything. (In particular, 'next' will return
** some other valid item on the table or nil.)
*/ */
static int equalkey (const TValue *k1, const Node *n2) { static int equalkey (const TValue *k1, const Node *n2, int deadok) {
if (rawtt(k1) != keytt(n2)) /* not the same variants? */ if ((rawtt(k1) != keytt(n2)) && /* not the same variants? */
!(deadok && keyisdead(n2) && iscollectable(k1)))
return 0; /* cannot be same key */ return 0; /* cannot be same key */
switch (ttypetag(k1)) { switch (keytt(n2)) {
case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE: case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE:
return 1; return 1;
case LUA_VNUMINT: case LUA_VNUMINT:
@ -187,7 +200,7 @@ static int equalkey (const TValue *k1, const Node *n2) {
return pvalue(k1) == pvalueraw(keyval(n2)); return pvalue(k1) == pvalueraw(keyval(n2));
case LUA_VLCF: case LUA_VLCF:
return fvalue(k1) == fvalueraw(keyval(n2)); return fvalue(k1) == fvalueraw(keyval(n2));
case LUA_VLNGSTR: case ctb(LUA_VLNGSTR):
return luaS_eqlngstr(tsvalue(k1), keystrval(n2)); return luaS_eqlngstr(tsvalue(k1), keystrval(n2));
default: default:
return gcvalue(k1) == gcvalueraw(keyval(n2)); return gcvalue(k1) == gcvalueraw(keyval(n2));
@ -251,11 +264,12 @@ static unsigned int setlimittosize (Table *t) {
/* /*
** "Generic" get version. (Not that generic: not valid for integers, ** "Generic" get version. (Not that generic: not valid for integers,
** which may be in array part, nor for floats with integral values.) ** which may be in array part, nor for floats with integral values.)
** See explanation about 'deadok' in function 'equalkey'.
*/ */
static const TValue *getgeneric (Table *t, const TValue *key) { static const TValue *getgeneric (Table *t, const TValue *key, int deadok) {
Node *n = mainpositionTV(t, key); Node *n = mainpositionTV(t, key);
for (;;) { /* check whether 'key' is somewhere in the chain */ for (;;) { /* check whether 'key' is somewhere in the chain */
if (equalkey(key, n)) if (equalkey(key, n, deadok))
return gval(n); /* that's it */ return gval(n); /* that's it */
else { else {
int nx = gnext(n); int nx = gnext(n);
@ -292,7 +306,7 @@ static unsigned int findindex (lua_State *L, Table *t, TValue *key,
if (i - 1u < asize) /* is 'key' inside array part? */ if (i - 1u < asize) /* is 'key' inside array part? */
return i; /* yes; that's the index */ return i; /* yes; that's the index */
else { else {
const TValue *n = getgeneric(t, key); const TValue *n = getgeneric(t, key, 1);
if (unlikely(isabstkey(n))) if (unlikely(isabstkey(n)))
luaG_runerror(L, "invalid key to 'next'"); /* key not found */ luaG_runerror(L, "invalid key to 'next'"); /* key not found */
i = cast_int(nodefromval(n) - gnode(t, 0)); /* key index in hash table */ i = cast_int(nodefromval(n) - gnode(t, 0)); /* key index in hash table */
@ -730,7 +744,7 @@ const TValue *luaH_getstr (Table *t, TString *key) {
else { /* for long strings, use generic case */ else { /* for long strings, use generic case */
TValue ko; TValue ko;
setsvalue(cast(lua_State *, NULL), &ko, key); setsvalue(cast(lua_State *, NULL), &ko, key);
return getgeneric(t, &ko); return getgeneric(t, &ko, 0);
} }
} }
@ -750,7 +764,7 @@ const TValue *luaH_get (Table *t, const TValue *key) {
/* else... */ /* else... */
} /* FALLTHROUGH */ } /* FALLTHROUGH */
default: default:
return getgeneric(t, key); return getgeneric(t, key, 0);
} }
} }

View file

@ -18,7 +18,7 @@
#define LUA_VERSION_MAJOR "5" #define LUA_VERSION_MAJOR "5"
#define LUA_VERSION_MINOR "4" #define LUA_VERSION_MINOR "4"
#define LUA_VERSION_RELEASE "1" #define LUA_VERSION_RELEASE "2"
#define LUA_VERSION_NUM 504 #define LUA_VERSION_NUM 504
#define LUA_VERSION_RELEASE_NUM (LUA_VERSION_NUM * 100 + 0) #define LUA_VERSION_RELEASE_NUM (LUA_VERSION_NUM * 100 + 0)

View file

@ -36,21 +36,6 @@
** ===================================================================== ** =====================================================================
*/ */
/*
@@ LUAI_MAXCSTACK defines the maximum depth for nested calls and
** also limits the maximum depth of other recursive algorithms in
** the implementation, such as syntactic analysis. A value too
** large may allow the interpreter to crash (C-stack overflow).
** The default value seems ok for regular machines, but may be
** too high for restricted hardware.
** The test file 'cstack.lua' may help finding a good limit.
** (It will crash with a limit too high.)
*/
#if !defined(LUAI_MAXCSTACK)
#define LUAI_MAXCSTACK 2000
#endif
/* /*
@@ LUA_USE_C89 controls the use of non-ISO-C89 features. @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
** Define it if you want Lua to avoid the use of a few C99 features ** Define it if you want Lua to avoid the use of a few C99 features

View file

@ -229,7 +229,7 @@ static int forprep (lua_State *L, StkId ra) {
count /= l_castS2U(-(step + 1)) + 1u; count /= l_castS2U(-(step + 1)) + 1u;
} }
/* store the counter in place of the limit (which won't be /* store the counter in place of the limit (which won't be
needed anymore */ needed anymore) */
setivalue(plimit, l_castU2S(count)); setivalue(plimit, l_castU2S(count));
} }
} }
@ -1092,15 +1092,11 @@ void luaV_finishOp (lua_State *L) {
#define ProtectNT(exp) (savepc(L), (exp), updatetrap(ci)) #define ProtectNT(exp) (savepc(L), (exp), updatetrap(ci))
/* /*
** Protect code that will finish the loop (returns) or can only raise ** Protect code that can only raise errors. (That is, it cannnot change
** errors. (That is, it will not return to the interpreter main loop ** the stack or hooks.)
** after changing the stack or hooks.)
*/ */
#define halfProtect(exp) (savestate(L,ci), (exp)) #define halfProtect(exp) (savestate(L,ci), (exp))
/* idem, but without changing the stack */
#define halfProtectNT(exp) (savepc(L), (exp))
/* 'c' is the limit of live values in the stack */ /* 'c' is the limit of live values in the stack */
#define checkGC(L,c) \ #define checkGC(L,c) \
{ luaC_condGC(L, (savepc(L), L->top = (c)), \ { luaC_condGC(L, (savepc(L), L->top = (c)), \
@ -1132,17 +1128,20 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
#if LUA_USE_JUMPTABLE #if LUA_USE_JUMPTABLE
#include "ljumptab.h" #include "ljumptab.h"
#endif #endif
tailcall: startfunc:
trap = L->hookmask; trap = L->hookmask;
returning: /* trap already set */
cl = clLvalue(s2v(ci->func)); cl = clLvalue(s2v(ci->func));
k = cl->p->k; k = cl->p->k;
pc = ci->u.l.savedpc; pc = ci->u.l.savedpc;
if (trap) { if (trap) {
if (cl->p->is_vararg) if (pc == cl->p->code) { /* first instruction (not resuming)? */
trap = 0; /* hooks will start after VARARGPREP instruction */ if (cl->p->is_vararg)
else if (pc == cl->p->code) /* first instruction (not resuming)? */ trap = 0; /* hooks will start after VARARGPREP instruction */
luaD_hookcall(L, ci); else /* check 'call' hook */
ci->u.l.trap = 1; /* there may be other hooks */ luaD_hookcall(L, ci);
}
ci->u.l.trap = 1; /* assume trap is on, for now */
} }
base = ci->func + 1; base = ci->func + 1;
/* main loop of interpreter */ /* main loop of interpreter */
@ -1151,7 +1150,7 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
StkId ra; /* instruction's A register */ StkId ra; /* instruction's A register */
vmfetch(); vmfetch();
lua_assert(base == ci->func + 1); lua_assert(base == ci->func + 1);
lua_assert(base <= L->top && L->top < L->stack + L->stacksize); lua_assert(base <= L->top && L->top < L->stack_last);
/* invalidate top for instructions not expecting it */ /* invalidate top for instructions not expecting it */
lua_assert(isIT(i) || (cast_void(L->top = base), 1)); lua_assert(isIT(i) || (cast_void(L->top = base), 1));
vmdispatch (GET_OPCODE(i)) { vmdispatch (GET_OPCODE(i)) {
@ -1606,24 +1605,32 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
vmbreak; vmbreak;
} }
vmcase(OP_CALL) { vmcase(OP_CALL) {
CallInfo *newci;
int b = GETARG_B(i); int b = GETARG_B(i);
int nresults = GETARG_C(i) - 1; int nresults = GETARG_C(i) - 1;
if (b != 0) /* fixed number of arguments? */ if (b != 0) /* fixed number of arguments? */
L->top = ra + b; /* top signals number of arguments */ L->top = ra + b; /* top signals number of arguments */
/* else previous instruction set top */ /* else previous instruction set top */
ProtectNT(luaD_call(L, ra, nresults)); savepc(L); /* in case of errors */
if ((newci = luaD_precall(L, ra, nresults)) == NULL)
updatetrap(ci); /* C call; nothing else to be done */
else { /* Lua call: run function in this same C frame */
ci = newci;
ci->callstatus = 0; /* call re-uses 'luaV_execute' */
goto startfunc;
}
vmbreak; vmbreak;
} }
vmcase(OP_TAILCALL) { vmcase(OP_TAILCALL) {
int b = GETARG_B(i); /* number of arguments + 1 (function) */ int b = GETARG_B(i); /* number of arguments + 1 (function) */
int nparams1 = GETARG_C(i); int nparams1 = GETARG_C(i);
/* delat is virtual 'func' - real 'func' (vararg functions) */ /* delta is virtual 'func' - real 'func' (vararg functions) */
int delta = (nparams1) ? ci->u.l.nextraargs + nparams1 : 0; int delta = (nparams1) ? ci->u.l.nextraargs + nparams1 : 0;
if (b != 0) if (b != 0)
L->top = ra + b; L->top = ra + b;
else /* previous instruction set top */ else /* previous instruction set top */
b = cast_int(L->top - ra); b = cast_int(L->top - ra);
savepc(ci); /* some calls here can raise errors */ savepc(ci); /* several calls here can raise errors */
if (TESTARG_k(i)) { if (TESTARG_k(i)) {
/* close upvalues from current call; the compiler ensures /* close upvalues from current call; the compiler ensures
that there are no to-be-closed variables here, so this that there are no to-be-closed variables here, so this
@ -1637,16 +1644,17 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
checkstackGCp(L, 1, ra); checkstackGCp(L, 1, ra);
} }
if (!ttisLclosure(s2v(ra))) { /* C function? */ if (!ttisLclosure(s2v(ra))) { /* C function? */
luaD_call(L, ra, LUA_MULTRET); /* call it */ luaD_precall(L, ra, LUA_MULTRET); /* call it */
updatetrap(ci); updatetrap(ci);
updatestack(ci); /* stack may have been relocated */ updatestack(ci); /* stack may have been relocated */
ci->func -= delta; ci->func -= delta; /* restore 'func' (if vararg) */
luaD_poscall(L, ci, cast_int(L->top - ra)); luaD_poscall(L, ci, cast_int(L->top - ra)); /* finish caller */
return; updatetrap(ci); /* 'luaD_poscall' can change hooks */
goto ret; /* caller returns after the tail call */
} }
ci->func -= delta; ci->func -= delta; /* restore 'func' (if vararg) */
luaD_pretailcall(L, ci, ra, b); /* prepare call frame */ luaD_pretailcall(L, ci, ra, b); /* prepare call frame */
goto tailcall; goto startfunc; /* execute the callee */
} }
vmcase(OP_RETURN) { vmcase(OP_RETURN) {
int n = GETARG_B(i) - 1; /* number of results */ int n = GETARG_B(i) - 1; /* number of results */
@ -1665,12 +1673,15 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
ci->func -= ci->u.l.nextraargs + nparams1; ci->func -= ci->u.l.nextraargs + nparams1;
L->top = ra + n; /* set call for 'luaD_poscall' */ L->top = ra + n; /* set call for 'luaD_poscall' */
luaD_poscall(L, ci, n); luaD_poscall(L, ci, n);
return; updatetrap(ci); /* 'luaD_poscall' can change hooks */
goto ret;
} }
vmcase(OP_RETURN0) { vmcase(OP_RETURN0) {
if (L->hookmask) { if (L->hookmask) {
L->top = ra; L->top = ra;
halfProtectNT(luaD_poscall(L, ci, 0)); /* no hurry... */ savepc(ci);
luaD_poscall(L, ci, 0); /* no hurry... */
trap = 1;
} }
else { /* do the 'poscall' here */ else { /* do the 'poscall' here */
int nres = ci->nresults; int nres = ci->nresults;
@ -1679,12 +1690,14 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
while (nres-- > 0) while (nres-- > 0)
setnilvalue(s2v(L->top++)); /* all results are nil */ setnilvalue(s2v(L->top++)); /* all results are nil */
} }
return; goto ret;
} }
vmcase(OP_RETURN1) { vmcase(OP_RETURN1) {
if (L->hookmask) { if (L->hookmask) {
L->top = ra + 1; L->top = ra + 1;
halfProtectNT(luaD_poscall(L, ci, 1)); /* no hurry... */ savepc(ci);
luaD_poscall(L, ci, 1); /* no hurry... */
trap = 1;
} }
else { /* do the 'poscall' here */ else { /* do the 'poscall' here */
int nres = ci->nresults; int nres = ci->nresults;
@ -1698,7 +1711,13 @@ void luaV_execute (lua_State *L, CallInfo *ci) {
setnilvalue(s2v(L->top++)); setnilvalue(s2v(L->top++));
} }
} }
return; ret: /* return from a Lua function */
if (ci->callstatus & CIST_FRESH)
return; /* end this frame */
else {
ci = ci->previous;
goto returning; /* continue running caller in this frame */
}
} }
vmcase(OP_FORLOOP) { vmcase(OP_FORLOOP) {
if (ttisinteger(s2v(ra + 2))) { /* integer loop? */ if (ttisinteger(s2v(ra + 2))) { /* integer loop? */

View file

@ -54,6 +54,6 @@ win32 {
RC_LANG = 0x0 RC_LANG = 0x0
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine Library" QMAKE_TARGET_DESCRIPTION = "LuaEngine Library"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2018-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2018-2021 Syping"
QMAKE_TARGET_PRODUCT = "LuaEngine" QMAKE_TARGET_PRODUCT = "LuaEngine"
} }

View file

@ -58,6 +58,6 @@ win32 {
RC_LANG = 0x0 RC_LANG = 0x0
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine Gui Library" QMAKE_TARGET_DESCRIPTION = "LuaEngine Gui Library"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2018-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2018-2021 Syping"
QMAKE_TARGET_PRODUCT = "LuaEngineGui" QMAKE_TARGET_PRODUCT = "LuaEngineGui"
} }

View file

@ -56,6 +56,6 @@ win32 {
RC_LANG = 0x0 RC_LANG = 0x0
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine I/O Library" QMAKE_TARGET_DESCRIPTION = "LuaEngine I/O Library"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2021 Syping"
QMAKE_TARGET_PRODUCT = "LuaEngineIO" QMAKE_TARGET_PRODUCT = "LuaEngineIO"
} }

View file

@ -57,6 +57,6 @@ win32 {
RC_LANG = 0x0 RC_LANG = 0x0
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine Network Library" QMAKE_TARGET_DESCRIPTION = "LuaEngine Network Library"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2021 Syping"
QMAKE_TARGET_PRODUCT = "LuaEngineNetwork" QMAKE_TARGET_PRODUCT = "LuaEngineNetwork"
} }

View file

@ -56,6 +56,6 @@ win32 {
RC_LANG = 0x0 RC_LANG = 0x0
QMAKE_TARGET_COMPANY = "Syping" QMAKE_TARGET_COMPANY = "Syping"
QMAKE_TARGET_DESCRIPTION = "LuaEngine OS Library" QMAKE_TARGET_DESCRIPTION = "LuaEngine OS Library"
QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2020 Syping" QMAKE_TARGET_COPYRIGHT = "Copyright (c) 2019-2021 Syping"
QMAKE_TARGET_PRODUCT = "LuaEngineOS" QMAKE_TARGET_PRODUCT = "LuaEngineOS"
} }