misc/liblua/ldebug.c
author dag10 <gottlieb.drew@gmail.com>
Wed, 16 Jan 2013 18:34:43 -0500
changeset 8393 85bd6c7b2641
parent 3697 d5b30d6373fc
child 10017 de822cd3df3a
permissions -rw-r--r--
Can now change theme for static and mission maps. Fixed mission map descriptions that had commas which broke them. Now, you must escape commas in map descriptions. Made bgwidget repaint on animation tick to avoid buffer-not-clearing issue with widgets that change overtop the background leaving a ghost image of the widget's previous state. Generated map is now the default map in the mapconfig widget.
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/*
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** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $
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** Debug Interface
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** See Copyright Notice in lua.h
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*/
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#include <stdarg.h>
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#include <stddef.h>
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#include <string.h>
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#define ldebug_c
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#define LUA_CORE
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#include "lua.h"
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#include "lapi.h"
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#include "lcode.h"
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#include "ldebug.h"
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#include "ldo.h"
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#include "lfunc.h"
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#include "lobject.h"
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#include "lopcodes.h"
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#include "lstate.h"
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#include "lstring.h"
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#include "ltable.h"
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#include "ltm.h"
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#include "lvm.h"
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static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
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static int currentpc (lua_State *L, CallInfo *ci) {
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  if (!isLua(ci)) return -1;  /* function is not a Lua function? */
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  if (ci == L->ci)
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    ci->savedpc = L->savedpc;
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  return pcRel(ci->savedpc, ci_func(ci)->l.p);
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}
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static int currentline (lua_State *L, CallInfo *ci) {
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  int pc = currentpc(L, ci);
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  if (pc < 0)
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    return -1;  /* only active lua functions have current-line information */
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  else
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    return getline(ci_func(ci)->l.p, pc);
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}
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/*
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** this function can be called asynchronous (e.g. during a signal)
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*/
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LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
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  if (func == NULL || mask == 0) {  /* turn off hooks? */
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    mask = 0;
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    func = NULL;
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  }
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  L->hook = func;
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  L->basehookcount = count;
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  resethookcount(L);
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  L->hookmask = cast_byte(mask);
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  return 1;
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}
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LUA_API lua_Hook lua_gethook (lua_State *L) {
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  return L->hook;
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}
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LUA_API int lua_gethookmask (lua_State *L) {
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  return L->hookmask;
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}
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LUA_API int lua_gethookcount (lua_State *L) {
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  return L->basehookcount;
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}
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LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
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  int status;
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  CallInfo *ci;
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  lua_lock(L);
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  for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
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    level--;
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    if (f_isLua(ci))  /* Lua function? */
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      level -= ci->tailcalls;  /* skip lost tail calls */
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  }
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  if (level == 0 && ci > L->base_ci) {  /* level found? */
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    status = 1;
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    ar->i_ci = cast_int(ci - L->base_ci);
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  }
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  else if (level < 0) {  /* level is of a lost tail call? */
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    status = 1;
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    ar->i_ci = 0;
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  }
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  else status = 0;  /* no such level */
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  lua_unlock(L);
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  return status;
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}
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static Proto *getluaproto (CallInfo *ci) {
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  return (isLua(ci) ? ci_func(ci)->l.p : NULL);
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}
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static const char *findlocal (lua_State *L, CallInfo *ci, int n) {
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  const char *name;
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  Proto *fp = getluaproto(ci);
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  if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL)
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    return name;  /* is a local variable in a Lua function */
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  else {
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    StkId limit = (ci == L->ci) ? L->top : (ci+1)->func;
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    if (limit - ci->base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
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      return "(*temporary)";
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    else
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      return NULL;
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  }
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}
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LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
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  CallInfo *ci = L->base_ci + ar->i_ci;
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  const char *name = findlocal(L, ci, n);
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  lua_lock(L);
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  if (name)
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      luaA_pushobject(L, ci->base + (n - 1));
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  lua_unlock(L);
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  return name;
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}
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LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
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  CallInfo *ci = L->base_ci + ar->i_ci;
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  const char *name = findlocal(L, ci, n);
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  lua_lock(L);
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  if (name)
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      setobjs2s(L, ci->base + (n - 1), L->top - 1);
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  L->top--;  /* pop value */
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  lua_unlock(L);
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  return name;
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}
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static void funcinfo (lua_Debug *ar, Closure *cl) {
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  if (cl->c.isC) {
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    ar->source = "=[C]";
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    ar->linedefined = -1;
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    ar->lastlinedefined = -1;
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    ar->what = "C";
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  }
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  else {
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    ar->source = getstr(cl->l.p->source);
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    ar->linedefined = cl->l.p->linedefined;
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    ar->lastlinedefined = cl->l.p->lastlinedefined;
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    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
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  }
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  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
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}
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static void info_tailcall (lua_Debug *ar) {
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  ar->name = ar->namewhat = "";
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  ar->what = "tail";
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  ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
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  ar->source = "=(tail call)";
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  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
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  ar->nups = 0;
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}
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static void collectvalidlines (lua_State *L, Closure *f) {
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  if (f == NULL || f->c.isC) {
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    setnilvalue(L->top);
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  }
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  else {
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    Table *t = luaH_new(L, 0, 0);
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    int *lineinfo = f->l.p->lineinfo;
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    int i;
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    for (i=0; i<f->l.p->sizelineinfo; i++)
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      setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
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    sethvalue(L, L->top, t);
2812
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  }
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  incr_top(L);
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}
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static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
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                    Closure *f, CallInfo *ci) {
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  int status = 1;
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  if (f == NULL) {
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    info_tailcall(ar);
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    return status;
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  }
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  for (; *what; what++) {
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    switch (*what) {
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      case 'S': {
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        funcinfo(ar, f);
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        break;
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      }
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      case 'l': {
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        ar->currentline = (ci) ? currentline(L, ci) : -1;
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        break;
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      }
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      case 'u': {
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        ar->nups = f->c.nupvalues;
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        break;
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      }
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      case 'n': {
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        ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
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        if (ar->namewhat == NULL) {
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          ar->namewhat = "";  /* not found */
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          ar->name = NULL;
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        }
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        break;
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      }
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      case 'L':
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      case 'f':  /* handled by lua_getinfo */
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        break;
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      default: status = 0;  /* invalid option */
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    }
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  }
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  return status;
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}
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LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
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  int status;
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  Closure *f = NULL;
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  CallInfo *ci = NULL;
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  lua_lock(L);
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   237
  if (*what == '>') {
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    StkId func = L->top - 1;
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    luai_apicheck(L, ttisfunction(func));
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    what++;  /* skip the '>' */
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    f = clvalue(func);
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    L->top--;  /* pop function */
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  }
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  else if (ar->i_ci != 0) {  /* no tail call? */
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   245
    ci = L->base_ci + ar->i_ci;
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    lua_assert(ttisfunction(ci->func));
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    f = clvalue(ci->func);
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   248
  }
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  status = auxgetinfo(L, what, ar, f, ci);
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   250
  if (strchr(what, 'f')) {
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   251
    if (f == NULL) setnilvalue(L->top);
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   252
    else setclvalue(L, L->top, f);
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    incr_top(L);
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   254
  }
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  if (strchr(what, 'L'))
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   256
    collectvalidlines(L, f);
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   257
  lua_unlock(L);
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   258
  return status;
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   259
}
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/*
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** {======================================================
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** Symbolic Execution and code checker
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** =======================================================
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*/
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   267
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#define check(x)		if (!(x)) return 0;
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   269
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#define checkjump(pt,pc)	check(0 <= pc && pc < pt->sizecode)
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   271
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#define checkreg(pt,reg)	check((reg) < (pt)->maxstacksize)
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static int precheck (const Proto *pt) {
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  check(pt->maxstacksize <= MAXSTACK);
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  check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
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   279
  check(!(pt->is_vararg & VARARG_NEEDSARG) ||
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   280
              (pt->is_vararg & VARARG_HASARG));
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   281
  check(pt->sizeupvalues <= pt->nups);
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   282
  check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
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   283
  check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
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   284
  return 1;
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   285
}
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   287
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   288
#define checkopenop(pt,pc)	luaG_checkopenop((pt)->code[(pc)+1])
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   289
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   290
int luaG_checkopenop (Instruction i) {
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   291
  switch (GET_OPCODE(i)) {
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   292
    case OP_CALL:
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   293
    case OP_TAILCALL:
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   294
    case OP_RETURN:
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   295
    case OP_SETLIST: {
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   296
      check(GETARG_B(i) == 0);
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   297
      return 1;
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   298
    }
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   299
    default: return 0;  /* invalid instruction after an open call */
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   300
  }
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   301
}
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diff changeset
   302
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   303
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   304
static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) {
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   305
  switch (mode) {
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   306
    case OpArgN: check(r == 0); break;
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   307
    case OpArgU: break;
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   308
    case OpArgR: checkreg(pt, r); break;
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   309
    case OpArgK:
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   310
      check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
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   311
      break;
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   312
  }
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   313
  return 1;
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   314
}
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diff changeset
   315
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   316
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   317
static Instruction symbexec (const Proto *pt, int lastpc, int reg) {
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   318
  int pc;
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   319
  int last;  /* stores position of last instruction that changed `reg' */
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   320
  last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */
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koda
parents:
diff changeset
   321
  check(precheck(pt));
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   322
  for (pc = 0; pc < lastpc; pc++) {
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parents:
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   323
    Instruction i = pt->code[pc];
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   324
    OpCode op = GET_OPCODE(i);
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   325
    int a = GETARG_A(i);
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diff changeset
   326
    int b = 0;
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   327
    int c = 0;
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   328
    check(op < NUM_OPCODES);
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koda
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diff changeset
   329
    checkreg(pt, a);
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parents:
diff changeset
   330
    switch (getOpMode(op)) {
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koda
parents:
diff changeset
   331
      case iABC: {
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diff changeset
   332
        b = GETARG_B(i);
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   333
        c = GETARG_C(i);
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   334
        check(checkArgMode(pt, b, getBMode(op)));
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parents:
diff changeset
   335
        check(checkArgMode(pt, c, getCMode(op)));
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   336
        break;
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diff changeset
   337
      }
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diff changeset
   338
      case iABx: {
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   339
        b = GETARG_Bx(i);
0a24853de796 add liblua to sources for macosx
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diff changeset
   340
        if (getBMode(op) == OpArgK) check(b < pt->sizek);
0a24853de796 add liblua to sources for macosx
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diff changeset
   341
        break;
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diff changeset
   342
      }
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   343
      case iAsBx: {
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   344
        b = GETARG_sBx(i);
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parents:
diff changeset
   345
        if (getBMode(op) == OpArgR) {
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   346
          int dest = pc+1+b;
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   347
          check(0 <= dest && dest < pt->sizecode);
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parents:
diff changeset
   348
          if (dest > 0) {
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   349
            int j;
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parents:
diff changeset
   350
            /* check that it does not jump to a setlist count; this
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koda
parents:
diff changeset
   351
               is tricky, because the count from a previous setlist may
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parents:
diff changeset
   352
               have the same value of an invalid setlist; so, we must
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koda
parents:
diff changeset
   353
               go all the way back to the first of them (if any) */
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koda
parents:
diff changeset
   354
            for (j = 0; j < dest; j++) {
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koda
parents:
diff changeset
   355
              Instruction d = pt->code[dest-1-j];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   356
              if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break;
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parents:
diff changeset
   357
            }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   358
            /* if 'j' is even, previous value is not a setlist (even if
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   359
               it looks like one) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   360
            check((j&1) == 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   361
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   362
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   363
        break;
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koda
parents:
diff changeset
   364
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   365
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   366
    if (testAMode(op)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   367
      if (a == reg) last = pc;  /* change register `a' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   368
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   369
    if (testTMode(op)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   370
      check(pc+2 < pt->sizecode);  /* check skip */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   371
      check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   372
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   373
    switch (op) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   374
      case OP_LOADBOOL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   375
        if (c == 1) {  /* does it jump? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   376
          check(pc+2 < pt->sizecode);  /* check its jump */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   377
          check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST ||
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   378
                GETARG_C(pt->code[pc+1]) != 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   379
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   380
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   381
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   382
      case OP_LOADNIL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   383
        if (a <= reg && reg <= b)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   384
          last = pc;  /* set registers from `a' to `b' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   385
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   386
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   387
      case OP_GETUPVAL:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   388
      case OP_SETUPVAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   389
        check(b < pt->nups);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   390
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   391
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   392
      case OP_GETGLOBAL:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   393
      case OP_SETGLOBAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   394
        check(ttisstring(&pt->k[b]));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   395
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   396
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   397
      case OP_SELF: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   398
        checkreg(pt, a+1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   399
        if (reg == a+1) last = pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   400
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   401
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   402
      case OP_CONCAT: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   403
        check(b < c);  /* at least two operands */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   404
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   405
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   406
      case OP_TFORLOOP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   407
        check(c >= 1);  /* at least one result (control variable) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   408
        checkreg(pt, a+2+c);  /* space for results */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   409
        if (reg >= a+2) last = pc;  /* affect all regs above its base */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   410
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   411
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   412
      case OP_FORLOOP:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   413
      case OP_FORPREP:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   414
        checkreg(pt, a+3);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   415
        /* go through */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   416
      case OP_JMP: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   417
        int dest = pc+1+b;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   418
        /* not full check and jump is forward and do not skip `lastpc'? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   419
        if (reg != NO_REG && pc < dest && dest <= lastpc)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   420
          pc += b;  /* do the jump */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   421
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   422
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   423
      case OP_CALL:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   424
      case OP_TAILCALL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   425
        if (b != 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   426
          checkreg(pt, a+b-1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   427
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   428
        c--;  /* c = num. returns */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   429
        if (c == LUA_MULTRET) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   430
          check(checkopenop(pt, pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   431
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   432
        else if (c != 0)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   433
          checkreg(pt, a+c-1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   434
        if (reg >= a) last = pc;  /* affect all registers above base */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   435
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   436
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   437
      case OP_RETURN: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   438
        b--;  /* b = num. returns */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   439
        if (b > 0) checkreg(pt, a+b-1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   440
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   441
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   442
      case OP_SETLIST: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   443
        if (b > 0) checkreg(pt, a + b);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   444
        if (c == 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   445
          pc++;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   446
          check(pc < pt->sizecode - 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   447
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   448
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   449
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   450
      case OP_CLOSURE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   451
        int nup, j;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   452
        check(b < pt->sizep);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   453
        nup = pt->p[b]->nups;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   454
        check(pc + nup < pt->sizecode);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   455
        for (j = 1; j <= nup; j++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   456
          OpCode op1 = GET_OPCODE(pt->code[pc + j]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   457
          check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   458
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   459
        if (reg != NO_REG)  /* tracing? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   460
          pc += nup;  /* do not 'execute' these pseudo-instructions */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   461
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   462
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   463
      case OP_VARARG: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   464
        check((pt->is_vararg & VARARG_ISVARARG) &&
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   465
             !(pt->is_vararg & VARARG_NEEDSARG));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   466
        b--;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   467
        if (b == LUA_MULTRET) check(checkopenop(pt, pc));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   468
        checkreg(pt, a+b-1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   469
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   470
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   471
      default: break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   472
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   473
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   474
  return pt->code[last];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   475
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   476
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   477
#undef check
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   478
#undef checkjump
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   479
#undef checkreg
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   480
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   481
/* }====================================================== */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   482
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   483
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   484
int luaG_checkcode (const Proto *pt) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   485
  return (symbexec(pt, pt->sizecode, NO_REG) != 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   486
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   487
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   488
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   489
static const char *kname (Proto *p, int c) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   490
  if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   491
    return svalue(&p->k[INDEXK(c)]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   492
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   493
    return "?";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   494
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   495
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   496
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   497
static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   498
                               const char **name) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   499
  if (isLua(ci)) {  /* a Lua function? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   500
    Proto *p = ci_func(ci)->l.p;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   501
    int pc = currentpc(L, ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   502
    Instruction i;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   503
    *name = luaF_getlocalname(p, stackpos+1, pc);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   504
    if (*name)  /* is a local? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   505
      return "local";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   506
    i = symbexec(p, pc, stackpos);  /* try symbolic execution */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   507
    lua_assert(pc != -1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   508
    switch (GET_OPCODE(i)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   509
      case OP_GETGLOBAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   510
        int g = GETARG_Bx(i);  /* global index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   511
        lua_assert(ttisstring(&p->k[g]));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   512
        *name = svalue(&p->k[g]);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   513
        return "global";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   514
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   515
      case OP_MOVE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   516
        int a = GETARG_A(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   517
        int b = GETARG_B(i);  /* move from `b' to `a' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   518
        if (b < a)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   519
          return getobjname(L, ci, b, name);  /* get name for `b' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   520
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   521
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   522
      case OP_GETTABLE: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   523
        int k = GETARG_C(i);  /* key index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   524
        *name = kname(p, k);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   525
        return "field";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   526
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   527
      case OP_GETUPVAL: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   528
        int u = GETARG_B(i);  /* upvalue index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   529
        *name = p->upvalues ? getstr(p->upvalues[u]) : "?";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   530
        return "upvalue";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   531
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   532
      case OP_SELF: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   533
        int k = GETARG_C(i);  /* key index */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   534
        *name = kname(p, k);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   535
        return "method";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   536
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   537
      default: break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   538
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   539
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   540
  return NULL;  /* no useful name found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   541
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   542
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   543
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   544
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   545
  Instruction i;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   546
  if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   547
    return NULL;  /* calling function is not Lua (or is unknown) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   548
  ci--;  /* calling function */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   549
  i = ci_func(ci)->l.p->code[currentpc(L, ci)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   550
  if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   551
      GET_OPCODE(i) == OP_TFORLOOP)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   552
    return getobjname(L, ci, GETARG_A(i), name);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   553
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   554
    return NULL;  /* no useful name can be found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   555
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   556
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   557
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   558
/* only ANSI way to check whether a pointer points to an array */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   559
static int isinstack (CallInfo *ci, const TValue *o) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   560
  StkId p;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   561
  for (p = ci->base; p < ci->top; p++)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   562
    if (o == p) return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   563
  return 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   564
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   565
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   566
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   567
void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   568
  const char *name = NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   569
  const char *t = luaT_typenames[ttype(o)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   570
  const char *kind = (isinstack(L->ci, o)) ?
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   571
                         getobjname(L, L->ci, cast_int(o - L->base), &name) :
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   572
                         NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   573
  if (kind)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   574
    luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   575
                op, kind, name, t);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   576
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   577
    luaG_runerror(L, "attempt to %s a %s value", op, t);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   578
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   579
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   580
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   581
void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   582
  if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   583
  lua_assert(!ttisstring(p1) && !ttisnumber(p1));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   584
  luaG_typeerror(L, p1, "concatenate");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   585
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   586
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   587
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   588
void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   589
  TValue temp;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   590
  if (luaV_tonumber(p1, &temp) == NULL)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   591
    p2 = p1;  /* first operand is wrong */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   592
  luaG_typeerror(L, p2, "perform arithmetic on");
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   593
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   594
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   595
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   596
int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   597
  const char *t1 = luaT_typenames[ttype(p1)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   598
  const char *t2 = luaT_typenames[ttype(p2)];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   599
  if (t1[2] == t2[2])
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   600
    luaG_runerror(L, "attempt to compare two %s values", t1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   601
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   602
    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   603
  return 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   604
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   605
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   606
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   607
static void addinfo (lua_State *L, const char *msg) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   608
  CallInfo *ci = L->ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   609
  if (isLua(ci)) {  /* is Lua code? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   610
    char buff[LUA_IDSIZE];  /* add file:line information */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   611
    int line = currentline(L, ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   612
    luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   613
    luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   614
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   615
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   616
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   617
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   618
void luaG_errormsg (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   619
  if (L->errfunc != 0) {  /* is there an error handling function? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   620
    StkId errfunc = restorestack(L, L->errfunc);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   621
    if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   622
    setobjs2s(L, L->top, L->top - 1);  /* move argument */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   623
    setobjs2s(L, L->top - 1, errfunc);  /* push function */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   624
    incr_top(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   625
    luaD_call(L, L->top - 2, 1);  /* call it */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   626
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   627
  luaD_throw(L, LUA_ERRRUN);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   628
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   629
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   630
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   631
void luaG_runerror (lua_State *L, const char *fmt, ...) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   632
  va_list argp;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   633
  va_start(argp, fmt);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   634
  addinfo(L, luaO_pushvfstring(L, fmt, argp));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   635
  va_end(argp);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   636
  luaG_errormsg(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   637
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   638