misc/liblua/ldebug.c
author nemo
Tue, 21 Aug 2018 15:11:28 -0400
branch0.9.24
changeset 13682 f60b3998ba56
parent 10017 de822cd3df3a
permissions -rw-r--r--
only-stats should never create visual gears. and lua should never rely on visual gears being created. critical is just to help ensure ones important to gameplay don't get lost in fast-forward
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     1
/*
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     2
** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     3
** Debug Interface
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     4
** See Copyright Notice in lua.h
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     5
*/
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     6
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     7
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     8
#include <stdarg.h>
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
     9
#include <stddef.h>
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    10
#include <string.h>
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    11
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    12
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    13
#define ldebug_c
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    14
#define LUA_CORE
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    15
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    16
#include "lua.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    17
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    18
#include "lapi.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    19
#include "lcode.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    20
#include "ldebug.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    21
#include "ldo.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    22
#include "lfunc.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    23
#include "lobject.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    24
#include "lopcodes.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    25
#include "lstate.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    26
#include "lstring.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    27
#include "ltable.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    28
#include "ltm.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    29
#include "lvm.h"
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    30
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    31
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    32
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    33
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    34
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    35
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    36
static int currentpc (lua_State *L, CallInfo *ci) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    37
  if (!isLua(ci)) return -1;  /* function is not a Lua function? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    38
  if (ci == L->ci)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    39
    ci->savedpc = L->savedpc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    40
  return pcRel(ci->savedpc, ci_func(ci)->l.p);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    41
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    42
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    43
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    44
static int currentline (lua_State *L, CallInfo *ci) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    45
  int pc = currentpc(L, ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    46
  if (pc < 0)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    47
    return -1;  /* only active lua functions have current-line information */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    48
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    49
    return getline(ci_func(ci)->l.p, pc);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    50
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    51
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    52
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    53
/*
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    54
** this function can be called asynchronous (e.g. during a signal)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    55
*/
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    56
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    57
  if (func == NULL || mask == 0) {  /* turn off hooks? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    58
    mask = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    59
    func = NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    60
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    61
  L->hook = func;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    62
  L->basehookcount = count;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    63
  resethookcount(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    64
  L->hookmask = cast_byte(mask);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    65
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    66
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    67
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    68
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    69
LUA_API lua_Hook lua_gethook (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    70
  return L->hook;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    71
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    72
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    73
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    74
LUA_API int lua_gethookmask (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    75
  return L->hookmask;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    76
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    77
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    78
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    79
LUA_API int lua_gethookcount (lua_State *L) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    80
  return L->basehookcount;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    81
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    82
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    83
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    84
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    85
  int status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    86
  CallInfo *ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    87
  lua_lock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    88
  for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    89
    level--;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    90
    if (f_isLua(ci))  /* Lua function? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    91
      level -= ci->tailcalls;  /* skip lost tail calls */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    92
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    93
  if (level == 0 && ci > L->base_ci) {  /* level found? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    94
    status = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    95
    ar->i_ci = cast_int(ci - L->base_ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    96
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    97
  else if (level < 0) {  /* level is of a lost tail call? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    98
    status = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
    99
    ar->i_ci = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   100
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   101
  else status = 0;  /* no such level */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   102
  lua_unlock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   103
  return status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   104
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   105
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   106
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   107
static Proto *getluaproto (CallInfo *ci) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   108
  return (isLua(ci) ? ci_func(ci)->l.p : NULL);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   109
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   110
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   111
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   112
static const char *findlocal (lua_State *L, CallInfo *ci, int n) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   113
  const char *name;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   114
  Proto *fp = getluaproto(ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   115
  if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   116
    return name;  /* is a local variable in a Lua function */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   117
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   118
    StkId limit = (ci == L->ci) ? L->top : (ci+1)->func;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   119
    if (limit - ci->base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   120
      return "(*temporary)";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   121
    else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   122
      return NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   123
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   124
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   125
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   126
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   127
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   128
  CallInfo *ci = L->base_ci + ar->i_ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   129
  const char *name = findlocal(L, ci, n);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   130
  lua_lock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   131
  if (name)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   132
      luaA_pushobject(L, ci->base + (n - 1));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   133
  lua_unlock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   134
  return name;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   135
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   136
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   137
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   138
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   139
  CallInfo *ci = L->base_ci + ar->i_ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   140
  const char *name = findlocal(L, ci, n);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   141
  lua_lock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   142
  if (name)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   143
      setobjs2s(L, ci->base + (n - 1), L->top - 1);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   144
  L->top--;  /* pop value */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   145
  lua_unlock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   146
  return name;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   147
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   148
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   149
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   150
static void funcinfo (lua_Debug *ar, Closure *cl) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   151
  if (cl->c.isC) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   152
    ar->source = "=[C]";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   153
    ar->linedefined = -1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   154
    ar->lastlinedefined = -1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   155
    ar->what = "C";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   156
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   157
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   158
    ar->source = getstr(cl->l.p->source);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   159
    ar->linedefined = cl->l.p->linedefined;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   160
    ar->lastlinedefined = cl->l.p->lastlinedefined;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   161
    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   162
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   163
  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   164
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   165
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   166
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   167
static void info_tailcall (lua_Debug *ar) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   168
  ar->name = ar->namewhat = "";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   169
  ar->what = "tail";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   170
  ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   171
  ar->source = "=(tail call)";
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   172
  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   173
  ar->nups = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   174
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   175
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   176
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   177
static void collectvalidlines (lua_State *L, Closure *f) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   178
  if (f == NULL || f->c.isC) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   179
    setnilvalue(L->top);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   180
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   181
  else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   182
    Table *t = luaH_new(L, 0, 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   183
    int *lineinfo = f->l.p->lineinfo;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   184
    int i;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   185
    for (i=0; i<f->l.p->sizelineinfo; i++)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   186
      setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
3697
d5b30d6373fc remove trailing spaces from end of line
koda
parents: 2812
diff changeset
   187
    sethvalue(L, L->top, t);
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   188
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   189
  incr_top(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   190
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   191
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   192
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   193
static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   194
                    Closure *f, CallInfo *ci) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   195
  int status = 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   196
  if (f == NULL) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   197
    info_tailcall(ar);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   198
    return status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   199
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   200
  for (; *what; what++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   201
    switch (*what) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   202
      case 'S': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   203
        funcinfo(ar, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   204
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   205
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   206
      case 'l': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   207
        ar->currentline = (ci) ? currentline(L, ci) : -1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   208
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   209
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   210
      case 'u': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   211
        ar->nups = f->c.nupvalues;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   212
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   213
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   214
      case 'n': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   215
        ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   216
        if (ar->namewhat == NULL) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   217
          ar->namewhat = "";  /* not found */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   218
          ar->name = NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   219
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   220
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   221
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   222
      case 'L':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   223
      case 'f':  /* handled by lua_getinfo */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   224
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   225
      default: status = 0;  /* invalid option */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   226
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   227
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   228
  return status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   229
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   230
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   231
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   232
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   233
  int status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   234
  Closure *f = NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   235
  CallInfo *ci = NULL;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   236
  lua_lock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   237
  if (*what == '>') {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   238
    StkId func = L->top - 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   239
    luai_apicheck(L, ttisfunction(func));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   240
    what++;  /* skip the '>' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   241
    f = clvalue(func);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   242
    L->top--;  /* pop function */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   243
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   244
  else if (ar->i_ci != 0) {  /* no tail call? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   245
    ci = L->base_ci + ar->i_ci;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   246
    lua_assert(ttisfunction(ci->func));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   247
    f = clvalue(ci->func);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   248
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   249
  status = auxgetinfo(L, what, ar, f, ci);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   250
  if (strchr(what, 'f')) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   251
    if (f == NULL) setnilvalue(L->top);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   252
    else setclvalue(L, L->top, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   253
    incr_top(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   254
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   255
  if (strchr(what, 'L'))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   256
    collectvalidlines(L, f);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   257
  lua_unlock(L);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   258
  return status;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   259
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   260
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   261
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   262
/*
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   263
** {======================================================
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   264
** Symbolic Execution and code checker
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   265
** =======================================================
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   266
*/
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   267
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   268
#define check(x)        if (!(x)) return 0;
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   269
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   270
#define checkjump(pt,pc)    check(0 <= pc && pc < pt->sizecode)
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   271
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   272
#define checkreg(pt,reg)    check((reg) < (pt)->maxstacksize)
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   273
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   274
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   275
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   276
static int precheck (const Proto *pt) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   277
  check(pt->maxstacksize <= MAXSTACK);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   278
  check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   279
  check(!(pt->is_vararg & VARARG_NEEDSARG) ||
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   280
              (pt->is_vararg & VARARG_HASARG));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   281
  check(pt->sizeupvalues <= pt->nups);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   282
  check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   283
  check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   284
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   285
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   286
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   287
10017
de822cd3df3a fixwhitespace and dos2unix
koda
parents: 3697
diff changeset
   288
#define checkopenop(pt,pc)  luaG_checkopenop((pt)->code[(pc)+1])
2812
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   289
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   290
int luaG_checkopenop (Instruction i) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   291
  switch (GET_OPCODE(i)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   292
    case OP_CALL:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   293
    case OP_TAILCALL:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   294
    case OP_RETURN:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   295
    case OP_SETLIST: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   296
      check(GETARG_B(i) == 0);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   297
      return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   298
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   299
    default: return 0;  /* invalid instruction after an open call */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   300
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   301
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   302
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   303
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   304
static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   305
  switch (mode) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   306
    case OpArgN: check(r == 0); break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   307
    case OpArgU: break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   308
    case OpArgR: checkreg(pt, r); break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   309
    case OpArgK:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   310
      check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   311
      break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   312
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   313
  return 1;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   314
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   315
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   316
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   317
static Instruction symbexec (const Proto *pt, int lastpc, int reg) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   318
  int pc;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   319
  int last;  /* stores position of last instruction that changed `reg' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   320
  last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   321
  check(precheck(pt));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   322
  for (pc = 0; pc < lastpc; pc++) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   323
    Instruction i = pt->code[pc];
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   324
    OpCode op = GET_OPCODE(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   325
    int a = GETARG_A(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   326
    int b = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   327
    int c = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   328
    check(op < NUM_OPCODES);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   329
    checkreg(pt, a);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   330
    switch (getOpMode(op)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   331
      case iABC: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   332
        b = GETARG_B(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   333
        c = GETARG_C(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   334
        check(checkArgMode(pt, b, getBMode(op)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   335
        check(checkArgMode(pt, c, getCMode(op)));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   336
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   337
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   338
      case iABx: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   339
        b = GETARG_Bx(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   340
        if (getBMode(op) == OpArgK) check(b < pt->sizek);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   341
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   342
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   343
      case iAsBx: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   344
        b = GETARG_sBx(i);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   345
        if (getBMode(op) == OpArgR) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   346
          int dest = pc+1+b;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   347
          check(0 <= dest && dest < pt->sizecode);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   348
          if (dest > 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   349
            int j;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   350
            /* check that it does not jump to a setlist count; this
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   351
               is tricky, because the count from a previous setlist may
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   352
               have the same value of an invalid setlist; so, we must
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   353
               go all the way back to the first of them (if any) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   354
            for (j = 0; j < dest; j++) {
0a24853de796 add liblua to sources for macosx
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;
0a24853de796 add liblua to sources for macosx
koda
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;
0a24853de796 add liblua to sources for macosx
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