ldebug.c File Reference

#include "lprefix.h"
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include "lua.h"
#include "lapi.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"

Go to the source code of this file.

Macros
#define	ldebug_c
#define	LUA_CORE
#define	noLuaClosure(f)   ((f) == NULL || (f)->c.tt == LUA_TCCL)
#define	ci_func(ci)   (clLvalue((ci)->func))

Functions
static const char *	funcnamefromcode (lua_State *L, CallInfo *ci, const char **name)
static int	currentpc (CallInfo *ci)
static int	currentline (CallInfo *ci)
static void	swapextra (lua_State *L)
LUA_API void	lua_sethook (lua_State *L, lua_Hook func, int mask, int count)
LUA_API lua_Hook	lua_gethook (lua_State *L)
LUA_API int	lua_gethookmask (lua_State *L)
LUA_API int	lua_gethookcount (lua_State *L)
LUA_API int	lua_getstack (lua_State *L, int level, lua_Debug *ar)
static const char *	upvalname (Proto *p, int uv)
static const char *	findvararg (CallInfo *ci, int n, StkId *pos)
static const char *	findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos)
LUA_API const char *	lua_getlocal (lua_State *L, const lua_Debug *ar, int n)
LUA_API const char *	lua_setlocal (lua_State *L, const lua_Debug *ar, int n)
static void	funcinfo (lua_Debug *ar, Closure *cl)
static void	collectvalidlines (lua_State *L, Closure *f)
static const char *	getfuncname (lua_State *L, CallInfo *ci, const char **name)
static int	auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, Closure *f, CallInfo *ci)
LUA_API int	lua_getinfo (lua_State *L, const char *what, lua_Debug *ar)
static const char *	getobjname (Proto *p, int lastpc, int reg, const char **name)
static void	kname (Proto *p, int pc, int c, const char **name)
static int	filterpc (int pc, int jmptarget)
static int	findsetreg (Proto *p, int lastpc, int reg)
static int	isinstack (CallInfo *ci, const TValue *o)
static const char *	getupvalname (CallInfo *ci, const TValue *o, const char **name)
static const char *	varinfo (lua_State *L, const TValue *o)
l_noret	luaG_typeerror (lua_State *L, const TValue *o, const char *op)
l_noret	luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2)
l_noret	luaG_opinterror (lua_State *L, const TValue *p1, const TValue *p2, const char *msg)
l_noret	luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2)
l_noret	luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2)
const char *	luaG_addinfo (lua_State *L, const char *msg, TString *src, int line)
l_noret	luaG_errormsg (lua_State *L)
l_noret	luaG_runerror (lua_State *L, const char *fmt,...)
void	luaG_traceexec (lua_State *L)

Macro Definition Documentation

ci_func

#define ci_func

(

ci

)

(clLvalue((ci)->func))

Definition at line 38 of file lua-5.3.6/src/ldebug.c.

Referenced by currentline(), currentpc(), findlocal(), funcnamefromcode(), getupvalname(), luaG_runerror(), luaG_traceexec(), and varinfo().

ldebug_c

#define ldebug_c

Definition at line 7 of file lua-5.3.6/src/ldebug.c.

LUA_CORE

#define LUA_CORE

Definition at line 8 of file lua-5.3.6/src/ldebug.c.

noLuaClosure

#define noLuaClosure

(

f

)

((f) == NULL || (f)->c.tt == LUA_TCCL)

Definition at line 34 of file lua-5.3.6/src/ldebug.c.

Referenced by auxgetinfo(), collectvalidlines(), and funcinfo().

Function Documentation

auxgetinfo()

static int auxgetinfo ( lua_State * L, const char * what, lua_Debug * ar, Closure * f, CallInfo * ci )

static

Definition at line 263 of file lua-5.3.6/src/ldebug.c.

                                                 {
  int status = 1;
  for (; *what; what++) {
    switch (*what) {
      case 'S': {
        funcinfo(ar, f);
        break;
      }
      case 'l': {
        ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;
        break;
      }
      case 'u': {
        ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
        if (noLuaClosure(f)) {
          ar->isvararg = 1;
          ar->nparams = 0;
        }
        else {
          ar->isvararg = f->l.p->is_vararg;
          ar->nparams = f->l.p->numparams;
        }
        break;
      }
      case 't': {
        ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
        break;
      }
      case 'n': {
        ar->namewhat = getfuncname(L, ci, &ar->name);
        if (ar->namewhat == NULL) {
          ar->namewhat = "";  /* not found */
          ar->name = NULL;
        }
        break;
      }
      case 'L':
      case 'f':  /* handled by lua_getinfo */
        break;
      default: status = 0;  /* invalid option */
    }
  }
  return status;
}

References Closure::c, CallInfo::callstatus, CIST_TAIL, lua_Debug::currentline, currentline(), funcinfo(), getfuncname(), Proto::is_vararg, isLua, lua_Debug::istailcall, lua_Debug::isvararg, Closure::l, lua_Debug::name, lua_Debug::namewhat, noLuaClosure, lua_Debug::nparams, NULL, Proto::numparams, lua_Debug::nups, and LClosure::p.

Referenced by lua_getinfo().

collectvalidlines()

static void collectvalidlines ( lua_State * L, Closure * f )

static

Definition at line 230 of file lua-5.3.6/src/ldebug.c.

                                                         {
  if (noLuaClosure(f)) {
    setnilvalue(L->top);
    api_incr_top(L);
  }
  else {
    int i;
    TValue v;
    int *lineinfo = f->l.p->lineinfo;
    Table *t = luaH_new(L);  /* new table to store active lines */
    sethvalue(L, L->top, t);  /* push it on stack */
    api_incr_top(L);
    setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */
    for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */
      luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */
  }
}

References api_incr_top, Closure::l, Proto::lineinfo, luaH_new(), luaH_setint(), noLuaClosure, LClosure::p, setbvalue, sethvalue, setnilvalue, Proto::sizelineinfo, and lua_State::top.

Referenced by lua_getinfo().

currentline()

static int currentline ( CallInfo * ci )

static

Definition at line 51 of file lua-5.3.6/src/ldebug.c.

                                      {
  return getfuncline(ci_func(ci)->p, currentpc(ci));
}

References ci_func, currentpc(), and getfuncline.

Referenced by auxgetinfo(), and luaG_runerror().

currentpc()

static int currentpc ( CallInfo * ci )

static

Definition at line 45 of file lua-5.3.6/src/ldebug.c.

                                    {
  lua_assert(isLua(ci));
  return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
}

References ci_func, isLua, CallInfo::l, lua_assert, pcRel, CallInfo::savedpc, and CallInfo::u.

Referenced by currentline(), findlocal(), funcnamefromcode(), and varinfo().

filterpc()

static int filterpc ( int pc, int jmptarget )

static

Definition at line 376 of file lua-5.3.6/src/ldebug.c.

                                            {
  if (pc < jmptarget)  /* is code conditional (inside a jump)? */
    return -1;  /* cannot know who sets that register */
  else return pc;  /* current position sets that register */
}

Referenced by findsetreg().

findlocal()

static const char * findlocal ( lua_State * L, CallInfo * ci, int n, StkId * pos )

static

Definition at line 146 of file lua-5.3.6/src/ldebug.c.

                                          {
  const char *name = NULL;
  StkId base;
  if (isLua(ci)) {
    if (n < 0)  /* access to vararg values? */
      return findvararg(ci, n, pos);
    else {
      base = ci->u.l.base;
      name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
    }
  }
  else
    base = ci->func + 1;
  if (name == NULL) {  /* no 'standard' name? */
    StkId limit = (ci == L->ci) ? L->top : ci->next->func;
    if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
      name = "(*temporary)";  /* generic name for any valid slot */
    else
      return NULL;  /* no name */
  }
  *pos = base + (n - 1);
  return name;
}

References CallInfo::base, lua_State::ci, ci_func, currentpc(), findvararg(), CallInfo::func, isLua, CallInfo::l, luaF_getlocalname(), name, CallInfo::next, NULL, lua_State::top, and CallInfo::u.

Referenced by lua_getlocal(), and lua_setlocal().

findsetreg()

static int findsetreg ( Proto * p, int lastpc, int reg )

static

Definition at line 386 of file lua-5.3.6/src/ldebug.c.

                                                      {
  int pc;
  int setreg = -1;  /* keep last instruction that changed 'reg' */
  int jmptarget = 0;  /* any code before this address is conditional */
  for (pc = 0; pc < lastpc; pc++) {
    Instruction i = p->code[pc];
    OpCode op = GET_OPCODE(i);
    int a = GETARG_A(i);
    switch (op) {
      case OP_LOADNIL: {
        int b = GETARG_B(i);
        if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
          setreg = filterpc(pc, jmptarget);
        break;
      }
      case OP_TFORCALL: {
        if (reg >= a + 2)  /* affect all regs above its base */
          setreg = filterpc(pc, jmptarget);
        break;
      }
      case OP_CALL:
      case OP_TAILCALL: {
        if (reg >= a)  /* affect all registers above base */
          setreg = filterpc(pc, jmptarget);
        break;
      }
      case OP_JMP: {
        int b = GETARG_sBx(i);
        int dest = pc + 1 + b;
        /* jump is forward and do not skip 'lastpc'? */
        if (pc < dest && dest <= lastpc) {
          if (dest > jmptarget)
            jmptarget = dest;  /* update 'jmptarget' */
        }
        break;
      }
      default:
        if (testAMode(op) && reg == a)  /* any instruction that set A */
          setreg = filterpc(pc, jmptarget);
        break;
    }
  }
  return setreg;
}

References Proto::code, filterpc(), GET_OPCODE, GETARG_A, GETARG_B, GETARG_sBx, OP_CALL, OP_JMP, OP_LOADNIL, OP_TAILCALL, OP_TFORCALL, and testAMode.

Referenced by getobjname().

findvararg()

static const char * findvararg ( CallInfo * ci, int n, StkId * pos )

static

Definition at line 134 of file lua-5.3.6/src/ldebug.c.

                                                                {
  int nparams = clLvalue(ci->func)->p->numparams;
  int nvararg = cast_int(ci->u.l.base - ci->func) - nparams;
  if (n <= -nvararg)
    return NULL;  /* no such vararg */
  else {
    *pos = ci->func + nparams - n;
    return "(*vararg)";  /* generic name for any vararg */
  }
}

References CallInfo::base, cast_int, clLvalue, CallInfo::func, CallInfo::l, NULL, and CallInfo::u.

Referenced by findlocal().

funcinfo()

static void funcinfo ( lua_Debug * ar, Closure * cl )

static

Definition at line 212 of file lua-5.3.6/src/ldebug.c.

                                                  {
  if (noLuaClosure(cl)) {
    ar->source = "=[C]";
    ar->linedefined = -1;
    ar->lastlinedefined = -1;
    ar->what = "C";
  }
  else {
    Proto *p = cl->l.p;
    ar->source = p->source ? getstr(p->source) : "=?";
    ar->linedefined = p->linedefined;
    ar->lastlinedefined = p->lastlinedefined;
    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
  }
  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
}

References getstr, Closure::l, Proto::lastlinedefined, lua_Debug::lastlinedefined, Proto::linedefined, lua_Debug::linedefined, LUA_IDSIZE, luaO_chunkid(), noLuaClosure, LClosure::p, lua_Debug::short_src, Proto::source, lua_Debug::source, and lua_Debug::what.

Referenced by auxgetinfo().

funcnamefromcode()

static const char * funcnamefromcode ( lua_State * L, CallInfo * ci, const char ** name )

static

Definition at line 492 of file lua-5.3.6/src/ldebug.c.

                                                        {
  TMS tm = (TMS)0;  /* (initial value avoids warnings) */
  Proto *p = ci_func(ci)->p;  /* calling function */
  int pc = currentpc(ci);  /* calling instruction index */
  Instruction i = p->code[pc];  /* calling instruction */
  if (ci->callstatus & CIST_HOOKED) {  /* was it called inside a hook? */
    *name = "?";
    return "hook";
  }
  switch (GET_OPCODE(i)) {
    case OP_CALL:
    case OP_TAILCALL:
      return getobjname(p, pc, GETARG_A(i), name);  /* get function name */
    case OP_TFORCALL: {  /* for iterator */
      *name = "for iterator";
       return "for iterator";
    }
    /* other instructions can do calls through metamethods */
    case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
      tm = TM_INDEX;
      break;
    case OP_SETTABUP: case OP_SETTABLE:
      tm = TM_NEWINDEX;
      break;
    case OP_ADD: case OP_SUB: case OP_MUL: case OP_MOD:
    case OP_POW: case OP_DIV: case OP_IDIV: case OP_BAND:
    case OP_BOR: case OP_BXOR: case OP_SHL: case OP_SHR: {
      int offset = cast_int(GET_OPCODE(i)) - cast_int(OP_ADD);  /* ORDER OP */
      tm = cast(TMS, offset + cast_int(TM_ADD));  /* ORDER TM */
      break;
    }
    case OP_UNM: tm = TM_UNM; break;
    case OP_BNOT: tm = TM_BNOT; break;
    case OP_LEN: tm = TM_LEN; break;
    case OP_CONCAT: tm = TM_CONCAT; break;
    case OP_EQ: tm = TM_EQ; break;
    case OP_LT: tm = TM_LT; break;
    case OP_LE: tm = TM_LE; break;
    default:
      return NULL;  /* cannot find a reasonable name */
  }
  *name = getstr(G(L)->tmname[tm]);
  return "metamethod";
}

References CallInfo::callstatus, cast, cast_int, ci_func, CIST_HOOKED, Proto::code, currentpc(), G, GET_OPCODE, GETARG_A, getobjname(), getstr, name, NULL, OP_ADD, OP_BAND, OP_BNOT, OP_BOR, OP_BXOR, OP_CALL, OP_CONCAT, OP_DIV, OP_EQ, OP_GETTABLE, OP_GETTABUP, OP_IDIV, OP_LE, OP_LEN, OP_LT, OP_MOD, OP_MUL, OP_POW, OP_SELF, OP_SETTABLE, OP_SETTABUP, OP_SHL, OP_SHR, OP_SUB, OP_TAILCALL, OP_TFORCALL, OP_UNM, Proto::p, TM_ADD, TM_BNOT, TM_CONCAT, TM_EQ, TM_INDEX, TM_LE, TM_LEN, TM_LT, TM_NEWINDEX, TM_UNM, and tmname.

Referenced by getfuncname().

getfuncname()

static const char * getfuncname ( lua_State * L, CallInfo * ci, const char ** name )

static

Definition at line 249 of file lua-5.3.6/src/ldebug.c.

                                                                               {
  if (ci == NULL)  /* no 'ci'? */
    return NULL;  /* no info */
  else if (ci->callstatus & CIST_FIN) {  /* is this a finalizer? */
    *name = "__gc";
    return "metamethod";  /* report it as such */
  }
  /* calling function is a known Lua function? */
  else if (!(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
    return funcnamefromcode(L, ci->previous, name);
  else return NULL;  /* no way to find a name */
}

References CallInfo::callstatus, CIST_FIN, CIST_TAIL, funcnamefromcode(), isLua, name, NULL, and CallInfo::previous.

Referenced by auxgetinfo().

getobjname()

static const char * getobjname ( Proto * p, int lastpc, int reg, const char ** name )

static

Definition at line 432 of file lua-5.3.6/src/ldebug.c.

                                                  {
  int pc;
  *name = luaF_getlocalname(p, reg + 1, lastpc);
  if (*name)  /* is a local? */
    return "local";
  /* else try symbolic execution */
  pc = findsetreg(p, lastpc, reg);
  if (pc != -1) {  /* could find instruction? */
    Instruction i = p->code[pc];
    OpCode op = GET_OPCODE(i);
    switch (op) {
      case OP_MOVE: {
        int b = GETARG_B(i);  /* move from 'b' to 'a' */
        if (b < GETARG_A(i))
          return getobjname(p, pc, b, name);  /* get name for 'b' */
        break;
      }
      case OP_GETTABUP:
      case OP_GETTABLE: {
        int k = GETARG_C(i);  /* key index */
        int t = GETARG_B(i);  /* table index */
        const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */
                         ? luaF_getlocalname(p, t + 1, pc)
                         : upvalname(p, t);
        kname(p, pc, k, name);
        return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
      }
      case OP_GETUPVAL: {
        *name = upvalname(p, GETARG_B(i));
        return "upvalue";
      }
      case OP_LOADK:
      case OP_LOADKX: {
        int b = (op == OP_LOADK) ? GETARG_Bx(i)
                                 : GETARG_Ax(p->code[pc + 1]);
        if (ttisstring(&p->k[b])) {
          *name = svalue(&p->k[b]);
          return "constant";
        }
        break;
      }
      case OP_SELF: {
        int k = GETARG_C(i);  /* key index */
        kname(p, pc, k, name);
        return "method";
      }
      default: break;  /* go through to return NULL */
    }
  }
  return NULL;  /* could not find reasonable name */
}

References Proto::code, findsetreg(), GET_OPCODE, GETARG_A, GETARG_Ax, GETARG_B, GETARG_Bx, GETARG_C, getobjname(), Proto::k, kname(), LUA_ENV, luaF_getlocalname(), name, NULL, OP_GETTABLE, OP_GETTABUP, OP_GETUPVAL, OP_LOADK, OP_LOADKX, OP_MOVE, OP_SELF, svalue, ttisstring, and upvalname().

Referenced by funcnamefromcode(), getobjname(), kname(), and varinfo().

getupvalname()

static const char * getupvalname ( CallInfo * ci, const TValue * o, const char ** name )

static

Definition at line 558 of file lua-5.3.6/src/ldebug.c.

                                                    {
  LClosure *c = ci_func(ci);
  int i;
  for (i = 0; i < c->nupvalues; i++) {
    if (c->upvals[i]->v == o) {
      *name = upvalname(c->p, i);
      return "upvalue";
    }
  }
  return NULL;
}

References ci_func, name, NULL, LClosure::p, upvalname(), LClosure::upvals, and UpVal::v.

Referenced by varinfo().

isinstack()

static int isinstack ( CallInfo * ci, const TValue * o )

static

Definition at line 547 of file lua-5.3.6/src/ldebug.c.

                                                     {
  ptrdiff_t i = o - ci->u.l.base;
  return (0 <= i && i < (ci->top - ci->u.l.base) && ci->u.l.base + i == o);
}

References CallInfo::base, CallInfo::l, CallInfo::top, and CallInfo::u.

Referenced by varinfo().

kname()

static void kname ( Proto * p, int pc, int c, const char ** name )

static

Definition at line 356 of file lua-5.3.6/src/ldebug.c.

                                                               {
  if (ISK(c)) {  /* is 'c' a constant? */
    TValue *kvalue = &p->k[INDEXK(c)];
    if (ttisstring(kvalue)) {  /* literal constant? */
      *name = svalue(kvalue);  /* it is its own name */
      return;
    }
    /* else no reasonable name found */
  }
  else {  /* 'c' is a register */
    const char *what = getobjname(p, pc, c, name); /* search for 'c' */
    if (what && *what == 'c') {  /* found a constant name? */
      return;  /* 'name' already filled */
    }
    /* else no reasonable name found */
  }
  *name = "?";  /* no reasonable name found */
}

References getobjname(), INDEXK, ISK, Proto::k, name, svalue, and ttisstring.

Referenced by getobjname().

lua_gethook()

LUA_API lua_Hook lua_gethook

(

lua_State *

L

)

Definition at line 95 of file lua-5.3.6/src/ldebug.c.

                                            {
  return L->hook;
}

References lua_State::hook.

lua_gethookcount()

LUA_API int lua_gethookcount

(

lua_State *

L

)

Definition at line 105 of file lua-5.3.6/src/ldebug.c.

                                            {
  return L->basehookcount;
}

References lua_State::basehookcount.

lua_gethookmask()

LUA_API int lua_gethookmask

(

lua_State *

L

)

Definition at line 100 of file lua-5.3.6/src/ldebug.c.

                                           {
  return L->hookmask;
}

References lua_State::hookmask.

lua_getinfo()

LUA_API int lua_getinfo	(	lua_State *	L,
		const char *	what,
		lua_Debug *	ar )

Definition at line 310 of file lua-5.3.6/src/ldebug.c.

                                                                        {
  int status;
  Closure *cl;
  CallInfo *ci;
  StkId func;
  lua_lock(L);
  swapextra(L);
  if (*what == '>') {
    ci = NULL;
    func = L->top - 1;
    api_check(L, ttisfunction(func), "function expected");
    what++;  /* skip the '>' */
    L->top--;  /* pop function */
  }
  else {
    ci = ar->i_ci;
    func = ci->func;
    lua_assert(ttisfunction(ci->func));
  }
  cl = ttisclosure(func) ? clvalue(func) : NULL;
  status = auxgetinfo(L, what, ar, cl, ci);
  if (strchr(what, 'f')) {
    setobjs2s(L, L->top, func);
    api_incr_top(L);
  }
  swapextra(L);  /* correct before option 'L', which can raise a mem. error */
  if (strchr(what, 'L'))
    collectvalidlines(L, cl);
  lua_unlock(L);
  return status;
}

References api_check, api_incr_top, auxgetinfo(), clvalue, collectvalidlines(), CallInfo::func, lua_Debug::i_ci, lua_assert, lua_lock, lua_unlock, NULL, setobjs2s, swapextra(), lua_State::top, ttisclosure, and ttisfunction.

lua_getlocal()

LUA_API const char * lua_getlocal	(	lua_State *	L,
		const lua_Debug *	ar,
		int	n )

Definition at line 172 of file lua-5.3.6/src/ldebug.c.

                                                                            {
  const char *name;
  lua_lock(L);
  swapextra(L);
  if (ar == NULL) {  /* information about non-active function? */
    if (!isLfunction(L->top - 1))  /* not a Lua function? */
      name = NULL;
    else  /* consider live variables at function start (parameters) */
      name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
  }
  else {  /* active function; get information through 'ar' */
    StkId pos = NULL;  /* to avoid warnings */
    name = findlocal(L, ar->i_ci, n, &pos);
    if (name) {
      setobj2s(L, L->top, pos);
      api_incr_top(L);
    }
  }
  swapextra(L);
  lua_unlock(L);
  return name;
}

References api_incr_top, clLvalue, findlocal(), lua_Debug::i_ci, isLfunction, lua_lock, lua_unlock, luaF_getlocalname(), name, NULL, setobj2s, swapextra(), and lua_State::top.

lua_getstack()

LUA_API int lua_getstack	(	lua_State *	L,
		int	level,
		lua_Debug *	ar )

Definition at line 110 of file lua-5.3.6/src/ldebug.c.

                                                                  {
  int status;
  CallInfo *ci;
  if (level < 0) return 0;  /* invalid (negative) level */
  lua_lock(L);
  for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
    level--;
  if (level == 0 && ci != &L->base_ci) {  /* level found? */
    status = 1;
    ar->i_ci = ci;
  }
  else status = 0;  /* no such level */
  lua_unlock(L);
  return status;
}

References lua_State::base_ci, lua_State::ci, lua_Debug::i_ci, lua_lock, lua_unlock, and CallInfo::previous.

lua_sethook()

LUA_API void lua_sethook	(	lua_State *	L,
		lua_Hook	func,
		int	mask,
		int	count )

Definition at line 81 of file lua-5.3.6/src/ldebug.c.

                                                                            {
  if (func == NULL || mask == 0) {  /* turn off hooks? */
    mask = 0;
    func = NULL;
  }
  if (isLua(L->ci))
    L->oldpc = L->ci->u.l.savedpc;
  L->hook = func;
  L->basehookcount = count;
  resethookcount(L);
  L->hookmask = cast_byte(mask);
}

References lua_State::basehookcount, cast_byte, lua_State::ci, lua_State::hook, lua_State::hookmask, isLua, CallInfo::l, mask, NULL, lua_State::oldpc, resethookcount, CallInfo::savedpc, and CallInfo::u.

lua_setlocal()

LUA_API const char * lua_setlocal	(	lua_State *	L,
		const lua_Debug *	ar,
		int	n )

Definition at line 196 of file lua-5.3.6/src/ldebug.c.

                                                                            {
  StkId pos = NULL;  /* to avoid warnings */
  const char *name;
  lua_lock(L);
  swapextra(L);
  name = findlocal(L, ar->i_ci, n, &pos);
  if (name) {
    setobjs2s(L, pos, L->top - 1);
    L->top--;  /* pop value */
  }
  swapextra(L);
  lua_unlock(L);
  return name;
}

References findlocal(), lua_Debug::i_ci, lua_lock, lua_unlock, name, NULL, setobjs2s, swapextra(), and lua_State::top.

luaG_addinfo()

const char * luaG_addinfo	(	lua_State *	L,
		const char *	msg,
		TString *	src,
		int	line )

Definition at line 629 of file lua-5.3.6/src/ldebug.c.

                                                  {
  char buff[LUA_IDSIZE];
  if (src)
    luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
  else {  /* no source available; use "?" instead */
    buff[0] = '?'; buff[1] = '\0';
  }
  return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
}

References getstr, LUA_IDSIZE, luaO_chunkid(), and luaO_pushfstring().

Referenced by lexerror(), lexerror(), and luaG_runerror().

luaG_concaterror()

l_noret luaG_concaterror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2 )

Definition at line 592 of file lua-5.3.6/src/ldebug.c.

                                                                            {
  if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
  luaG_typeerror(L, p1, "concatenate");
}

References cvt2str, luaG_typeerror(), and ttisstring.

luaG_errormsg()

l_noret luaG_errormsg

(

lua_State *

L

)

Definition at line 641 of file lua-5.3.6/src/ldebug.c.

                                     {
  if (L->errfunc != 0) {  /* is there an error handling function? */
    StkId errfunc = restorestack(L, L->errfunc);
    setobjs2s(L, L->top, L->top - 1);  /* move argument */
    setobjs2s(L, L->top - 1, errfunc);  /* push function */
    L->top++;  /* assume EXTRA_STACK */
    luaD_callnoyield(L, L->top - 2, 1);  /* call it */
  }
  luaD_throw(L, LUA_ERRRUN);
}

References lua_State::errfunc, LUA_ERRRUN, luaD_callnoyield(), luaD_throw(), restorestack, setobjs2s, and lua_State::top.

Referenced by luaG_runerror().

luaG_opinterror()

l_noret luaG_opinterror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2,
		const char *	msg )

Definition at line 598 of file lua-5.3.6/src/ldebug.c.

                                                            {
  lua_Number temp;
  if (!tonumber(p1, &temp))  /* first operand is wrong? */
    p2 = p1;  /* now second is wrong */
  luaG_typeerror(L, p2, msg);
}

References luaG_typeerror(), and tonumber.

Referenced by luaT_trybinTM().

luaG_ordererror()

l_noret luaG_ordererror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2 )

Definition at line 618 of file lua-5.3.6/src/ldebug.c.

                                                                           {
  const char *t1 = luaT_objtypename(L, p1);
  const char *t2 = luaT_objtypename(L, p2);
  if (strcmp(t1, t2) == 0)
    luaG_runerror(L, "attempt to compare two %s values", t1);
  else
    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
}

References luaG_runerror(), and luaT_objtypename().

luaG_runerror()

l_noret luaG_runerror	(	lua_State *	L,
		const char *	fmt,
			... )

Definition at line 653 of file lua-5.3.6/src/ldebug.c.

                                                           {
  CallInfo *ci = L->ci;
  const char *msg;
  va_list argp;
  luaC_checkGC(L);  /* error message uses memory */
  va_start(argp, fmt);
  msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
  va_end(argp);
  if (isLua(ci))  /* if Lua function, add source:line information */
    luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
  luaG_errormsg(L);
}

References lua_State::ci, ci_func, currentline(), isLua, luaC_checkGC, luaG_addinfo(), luaG_errormsg(), and luaO_pushvfstring().

Referenced by luaG_ordererror(), luaG_tointerror(), and luaG_typeerror().

luaG_tointerror()

l_noret luaG_tointerror	(	lua_State *	L,
		const TValue *	p1,
		const TValue *	p2 )

Definition at line 610 of file lua-5.3.6/src/ldebug.c.

                                                                           {
  lua_Integer temp;
  if (!tointeger(p1, &temp))
    p2 = p1;
  luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
}

References luaG_runerror(), tointeger, and varinfo().

Referenced by luaT_trybinTM().

luaG_traceexec()

void luaG_traceexec

(

lua_State *

L

)

Definition at line 667 of file lua-5.3.6/src/ldebug.c.

                                   {
  CallInfo *ci = L->ci;
  lu_byte mask = L->hookmask;
  int counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
  if (counthook)
    resethookcount(L);  /* reset count */
  else if (!(mask & LUA_MASKLINE))
    return;  /* no line hook and count != 0; nothing to be done */
  if (ci->callstatus & CIST_HOOKYIELD) {  /* called hook last time? */
    ci->callstatus &= ~CIST_HOOKYIELD;  /* erase mark */
    return;  /* do not call hook again (VM yielded, so it did not move) */
  }
  if (counthook)
    luaD_hook(L, LUA_HOOKCOUNT, -1);  /* call count hook */
  if (mask & LUA_MASKLINE) {
    Proto *p = ci_func(ci)->p;
    int npc = pcRel(ci->u.l.savedpc, p);
    int newline = getfuncline(p, npc);
    if (npc == 0 ||  /* call linehook when enter a new function, */
        ci->u.l.savedpc <= L->oldpc ||  /* when jump back (loop), or when */
        newline != getfuncline(p, pcRel(L->oldpc, p)))  /* enter a new line */
      luaD_hook(L, LUA_HOOKLINE, newline);  /* call line hook */
  }
  L->oldpc = ci->u.l.savedpc;
  if (L->status == LUA_YIELD) {  /* did hook yield? */
    if (counthook)
      L->hookcount = 1;  /* undo decrement to zero */
    ci->u.l.savedpc--;  /* undo increment (resume will increment it again) */
    ci->callstatus |= CIST_HOOKYIELD;  /* mark that it yielded */
    ci->func = L->top - 1;  /* protect stack below results */
    luaD_throw(L, LUA_YIELD);
  }
}

References CallInfo::callstatus, lua_State::ci, ci_func, CIST_HOOKYIELD, CallInfo::func, getfuncline, lua_State::hookcount, lua_State::hookmask, CallInfo::l, LUA_HOOKCOUNT, LUA_HOOKLINE, LUA_MASKCOUNT, LUA_MASKLINE, LUA_YIELD, luaD_hook(), luaD_throw(), mask, lua_State::oldpc, Proto::p, pcRel, resethookcount, CallInfo::savedpc, lua_State::status, lua_State::top, and CallInfo::u.

luaG_typeerror()

l_noret luaG_typeerror	(	lua_State *	L,
		const TValue *	o,
		const char *	op )

Definition at line 586 of file lua-5.3.6/src/ldebug.c.

                                                                       {
  const char *t = luaT_objtypename(L, o);
  luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
}

References luaG_runerror(), luaT_objtypename(), and varinfo().

Referenced by luaG_concaterror(), and luaG_opinterror().

swapextra()

static void swapextra ( lua_State * L )

static

Definition at line 62 of file lua-5.3.6/src/ldebug.c.

                                     {
  if (L->status == LUA_YIELD) {
    CallInfo *ci = L->ci;  /* get function that yielded */
    StkId temp = ci->func;  /* exchange its 'func' and 'extra' values */
    ci->func = restorestack(L, ci->extra);
    ci->extra = savestack(L, temp);
  }
}

References lua_State::ci, CallInfo::extra, CallInfo::func, LUA_YIELD, restorestack, savestack, and lua_State::status.

Referenced by lua_getinfo(), lua_getlocal(), and lua_setlocal().

upvalname()

static const char * upvalname ( Proto * p, int uv )

static

Definition at line 127 of file lua-5.3.6/src/ldebug.c.

                                                {
  TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
  if (s == NULL) return "?";
  else return getstr(s);
}

References check_exp, getstr, NULL, s, and Proto::upvalues.

Referenced by getobjname(), and getupvalname().

varinfo()

static const char * varinfo ( lua_State * L, const TValue * o )

static

Definition at line 572 of file lua-5.3.6/src/ldebug.c.

                                                           {
  const char *name = NULL;  /* to avoid warnings */
  CallInfo *ci = L->ci;
  const char *kind = NULL;
  if (isLua(ci)) {
    kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
    if (!kind && isinstack(ci, o))  /* no? try a register */
      kind = getobjname(ci_func(ci)->p, currentpc(ci),
                        cast_int(o - ci->u.l.base), &name);
  }
  return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
}

References CallInfo::base, cast_int, lua_State::ci, ci_func, currentpc(), getobjname(), getupvalname(), isinstack(), isLua, CallInfo::l, luaO_pushfstring(), name, NULL, and CallInfo::u.

Referenced by luaG_tointerror(), and luaG_typeerror().