PenTest/nmap
1
0
Fork 0
mirror of https://github.com/nmap/nmap.git synced 2025-12-10 09:49:05 +00:00
Code Issues Projects Releases Wiki Activity

Update liblua to Lua 5.3.4

Browse Source
This commit is contained in:
dmiller
2018-04-05 13:51:20 +00:00
parent 90230ed85d
commit 4519e7f899
27 changed files with 440 additions and 351 deletions
Download Patch File Download Diff File Expand all files Collapse all files

226
liblua/ldo.c
View File

@@ -1,5 +1,5 @@
/*
** $Id: ldo.c,v 2.151 2015/12/16 16:40:07 roberto Exp $
** $Id: ldo.c,v 2.157 2016/12/13 15:52:21 roberto Exp $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
@@ -211,9 +211,9 @@ static int stackinuse (lua_State *L) {
CallInfo *ci;
StkId lim = L->top;
for (ci = L->ci; ci != NULL; ci = ci->previous) {
lua_assert(ci->top <= L->stack_last);
if (lim < ci->top) lim = ci->top;
}
lua_assert(lim <= L->stack_last);
return cast_int(lim - L->stack) + 1; /* part of stack in use */
}
@@ -221,16 +221,19 @@ static int stackinuse (lua_State *L) {
void luaD_shrinkstack (lua_State *L) {
int inuse = stackinuse(L);
int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
if (L->stacksize > LUAI_MAXSTACK) /* was handling stack overflow? */
if (goodsize > LUAI_MAXSTACK)
goodsize = LUAI_MAXSTACK; /* respect stack limit */
if (L->stacksize > LUAI_MAXSTACK) /* had been handling stack overflow? */
luaE_freeCI(L); /* free all CIs (list grew because of an error) */
else
luaE_shrinkCI(L); /* shrink list */
if (inuse <= LUAI_MAXSTACK && /* not handling stack overflow? */
goodsize < L->stacksize) /* trying to shrink? */
luaD_reallocstack(L, goodsize); /* shrink it */
else
condmovestack(L,,); /* don't change stack (change only for debugging) */
/* if thread is currently not handling a stack overflow and its
good size is smaller than current size, shrink its stack */
if (inuse <= (LUAI_MAXSTACK - EXTRA_STACK) &&
goodsize < L->stacksize)
luaD_reallocstack(L, goodsize);
else /* don't change stack */
condmovestack(L,{},{}); /* (change only for debugging) */
}
@@ -322,86 +325,6 @@ static void tryfuncTM (lua_State *L, StkId func) {
}
#define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
/* macro to check stack size, preserving 'p' */
#define checkstackp(L,n,p) \
luaD_checkstackaux(L, n, \
ptrdiff_t t__ = savestack(L, p); /* save 'p' */ \
luaC_checkGC(L), /* stack grow uses memory */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/*
** Prepares a function call: checks the stack, creates a new CallInfo
** entry, fills in the relevant information, calls hook if needed.
** If function is a C function, does the call, too. (Otherwise, leave
** the execution ('luaV_execute') to the caller, to allow stackless
** calls.) Returns true iff function has been executed (C function).
*/
int luaD_precall (lua_State *L, StkId func, int nresults) {
lua_CFunction f;
CallInfo *ci;
switch (ttype(func)) {
case LUA_TCCL: /* C closure */
f = clCvalue(func)->f;
goto Cfunc;
case LUA_TLCF: /* light C function */
f = fvalue(func);
Cfunc: {
int n; /* number of returns */
checkstackp(L, LUA_MINSTACK, func); /* ensure minimum stack size */
ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults;
ci->func = func;
ci->top = L->top + LUA_MINSTACK;
lua_assert(ci->top <= L->stack_last);
ci->callstatus = 0;
if (L->hookmask & LUA_MASKCALL)
luaD_hook(L, LUA_HOOKCALL, -1);
lua_unlock(L);
n = (*f)(L); /* do the actual call */
lua_lock(L);
api_checknelems(L, n);
luaD_poscall(L, ci, L->top - n, n);
return 1;
}
case LUA_TLCL: { /* Lua function: prepare its call */
StkId base;
Proto *p = clLvalue(func)->p;
int n = cast_int(L->top - func) - 1; /* number of real arguments */
int fsize = p->maxstacksize; /* frame size */
checkstackp(L, fsize, func);
if (p->is_vararg != 1) { /* do not use vararg? */
for (; n < p->numparams; n++)
setnilvalue(L->top++); /* complete missing arguments */
base = func + 1;
}
else
base = adjust_varargs(L, p, n);
ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults;
ci->func = func;
ci->u.l.base = base;
L->top = ci->top = base + fsize;
lua_assert(ci->top <= L->stack_last);
ci->u.l.savedpc = p->code; /* starting point */
ci->callstatus = CIST_LUA;
if (L->hookmask & LUA_MASKCALL)
callhook(L, ci);
return 0;
}
default: { /* not a function */
checkstackp(L, 1, func); /* ensure space for metamethod */
tryfuncTM(L, func); /* try to get '__call' metamethod */
return luaD_precall(L, func, nresults); /* now it must be a function */
}
}
}
/*
** Given 'nres' results at 'firstResult', move 'wanted' of them to 'res'.
** Handle most typical cases (zero results for commands, one result for
@@ -468,6 +391,86 @@ int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
}
#define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
/* macro to check stack size, preserving 'p' */
#define checkstackp(L,n,p) \
luaD_checkstackaux(L, n, \
ptrdiff_t t__ = savestack(L, p); /* save 'p' */ \
luaC_checkGC(L), /* stack grow uses memory */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/*
** Prepares a function call: checks the stack, creates a new CallInfo
** entry, fills in the relevant information, calls hook if needed.
** If function is a C function, does the call, too. (Otherwise, leave
** the execution ('luaV_execute') to the caller, to allow stackless
** calls.) Returns true iff function has been executed (C function).
*/
int luaD_precall (lua_State *L, StkId func, int nresults) {
lua_CFunction f;
CallInfo *ci;
switch (ttype(func)) {
case LUA_TCCL: /* C closure */
f = clCvalue(func)->f;
goto Cfunc;
case LUA_TLCF: /* light C function */
f = fvalue(func);
Cfunc: {
int n; /* number of returns */
checkstackp(L, LUA_MINSTACK, func); /* ensure minimum stack size */
ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults;
ci->func = func;
ci->top = L->top + LUA_MINSTACK;
lua_assert(ci->top <= L->stack_last);
ci->callstatus = 0;
if (L->hookmask & LUA_MASKCALL)
luaD_hook(L, LUA_HOOKCALL, -1);
lua_unlock(L);
n = (*f)(L); /* do the actual call */
lua_lock(L);
api_checknelems(L, n);
luaD_poscall(L, ci, L->top - n, n);
return 1;
}
case LUA_TLCL: { /* Lua function: prepare its call */
StkId base;
Proto *p = clLvalue(func)->p;
int n = cast_int(L->top - func) - 1; /* number of real arguments */
int fsize = p->maxstacksize; /* frame size */
checkstackp(L, fsize, func);
if (p->is_vararg)
base = adjust_varargs(L, p, n);
else { /* non vararg function */
for (; n < p->numparams; n++)
setnilvalue(L->top++); /* complete missing arguments */
base = func + 1;
}
ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults;
ci->func = func;
ci->u.l.base = base;
L->top = ci->top = base + fsize;
lua_assert(ci->top <= L->stack_last);
ci->u.l.savedpc = p->code; /* starting point */
ci->callstatus = CIST_LUA;
if (L->hookmask & LUA_MASKCALL)
callhook(L, ci);
return 0;
}
default: { /* not a function */
checkstackp(L, 1, func); /* ensure space for metamethod */
tryfuncTM(L, func); /* try to get '__call' metamethod */
return luaD_precall(L, func, nresults); /* now it must be a function */
}
}
}
/*
** Check appropriate error for stack overflow ("regular" overflow or
** overflow while handling stack overflow). If 'nCalls' is larger than
@@ -520,19 +523,17 @@ static void finishCcall (lua_State *L, int status) {
/* error status can only happen in a protected call */
lua_assert((ci->callstatus & CIST_YPCALL) || status == LUA_YIELD);
if (ci->callstatus & CIST_YPCALL) { /* was inside a pcall? */
ci->callstatus &= ~CIST_YPCALL; /* finish 'lua_pcall' */
L->errfunc = ci->u.c.old_errfunc;
ci->callstatus &= ~CIST_YPCALL; /* continuation is also inside it */
L->errfunc = ci->u.c.old_errfunc; /* with the same error function */
}
/* finish 'lua_callk'/'lua_pcall'; CIST_YPCALL and 'errfunc' already
handled */
adjustresults(L, ci->nresults);
/* call continuation function */
lua_unlock(L);
n = (*ci->u.c.k)(L, status, ci->u.c.ctx);
n = (*ci->u.c.k)(L, status, ci->u.c.ctx); /* call continuation function */
lua_lock(L);
api_checknelems(L, n);
/* finish 'luaD_precall' */
luaD_poscall(L, ci, L->top - n, n);
luaD_poscall(L, ci, L->top - n, n); /* finish 'luaD_precall' */
}
@@ -595,15 +596,16 @@ static int recover (lua_State *L, int status) {
/*
** signal an error in the call to 'resume', not in the execution of the
** coroutine itself. (Such errors should not be handled by any coroutine
** error handler and should not kill the coroutine.)
** Signal an error in the call to 'lua_resume', not in the execution
** of the coroutine itself. (Such errors should not be handled by any
** coroutine error handler and should not kill the coroutine.)
*/
static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
L->top = firstArg; /* remove args from the stack */
static int resume_error (lua_State *L, const char *msg, int narg) {
L->top -= narg; /* remove args from the stack */
setsvalue2s(L, L->top, luaS_new(L, msg)); /* push error message */
api_incr_top(L);
luaD_throw(L, -1); /* jump back to 'lua_resume' */
lua_unlock(L);
return LUA_ERRRUN;
}
@@ -615,22 +617,15 @@ static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
** coroutine.
*/
static void resume (lua_State *L, void *ud) {
int nCcalls = L->nCcalls;
int n = *(cast(int*, ud)); /* number of arguments */
StkId firstArg = L->top - n; /* first argument */
CallInfo *ci = L->ci;
if (nCcalls >= LUAI_MAXCCALLS)
resume_error(L, "C stack overflow", firstArg);
if (L->status == LUA_OK) { /* may be starting a coroutine */
if (ci != &L->base_ci) /* not in base level? */
resume_error(L, "cannot resume non-suspended coroutine", firstArg);
/* coroutine is in base level; start running it */
if (L->status == LUA_OK) { /* starting a coroutine? */
if (!luaD_precall(L, firstArg - 1, LUA_MULTRET)) /* Lua function? */
luaV_execute(L); /* call it */
}
else if (L->status != LUA_YIELD)
resume_error(L, "cannot resume dead coroutine", firstArg);
else { /* resuming from previous yield */
lua_assert(L->status == LUA_YIELD);
L->status = LUA_OK; /* mark that it is running (again) */
ci->func = restorestack(L, ci->extra);
if (isLua(ci)) /* yielded inside a hook? */
@@ -647,7 +642,6 @@ static void resume (lua_State *L, void *ud) {
}
unroll(L, NULL); /* run continuation */
}
lua_assert(nCcalls == L->nCcalls);
}
@@ -655,8 +649,16 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
int status;
unsigned short oldnny = L->nny; /* save "number of non-yieldable" calls */
lua_lock(L);
luai_userstateresume(L, nargs);
if (L->status == LUA_OK) { /* may be starting a coroutine */
if (L->ci != &L->base_ci) /* not in base level? */
return resume_error(L, "cannot resume non-suspended coroutine", nargs);
}
else if (L->status != LUA_YIELD)
return resume_error(L, "cannot resume dead coroutine", nargs);
L->nCcalls = (from) ? from->nCcalls + 1 : 1;
if (L->nCcalls >= LUAI_MAXCCALLS)
return resume_error(L, "C stack overflow", nargs);
luai_userstateresume(L, nargs);
L->nny = 0; /* allow yields */
api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
status = luaD_rawrunprotected(L, resume, &nargs);