source/texk/web2c/luatexdir/lua/texluac.w

   1 % texluac.w
   2 %
   3 % Copyright (C) 1994-2007 Lua.org, PUC-Rio.  All rights reserved.
   4 % Copyright 2006-2013 Taco Hoekwater <taco@@luatex.org>
   5 %
   6 % Permission is hereby granted, free of charge, to any person obtaining
   7 % a copy of this software and associated documentation files (the
   8 % "Software"), to deal in the Software without restriction, including
   9 % without limitation the rights to use, copy, modify, merge, publish,
  10 % distribute, sublicense, and/or sell copies of the Software, and to
  11 % permit persons to whom the Software is furnished to do so, subject to
  12 % the following conditions:
  13 %
  14 % The above copyright notice and this permission notice shall be
  15 % included in all copies or substantial portions of the Software.
  16 %
  17 % THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18 % EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19 % MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20 % IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  21 % CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22 % TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23 % SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24 %
  25 % This file is part of LuaTeX.
  26
  27 @ @c
  28
  29
  30 #include <ctype.h>
  31 #include <errno.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 #define luac_c
  37 #define LUA_CORE
  38
  39 #include "lua.h"
  40 #include "lauxlib.h"
  41
  42 #include "ldebug.h"
  43 #include "ldo.h"
  44 #include "lfunc.h"
  45 #include "lmem.h"
  46 #include "lobject.h"
  47 #include "lopcodes.h"
  48 #include "lstring.h"
  49 #include "lundump.h"
  50
  51 #include "lua/luatex-api.h"
  52
  53 static void PrintFunction(const Proto* f, int full);
  54 #define luaU_print      PrintFunction
  55
  56 @ @c
  57 /*  fix for non-gcc compilation: */
  58 #if !defined(__GNUC__) || (__GNUC__ < 2)
  59 # define __attribute__(x)
  60 #endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
  61
  62 @ @c
  63 #define PROGNAME        "texluac"       /* default program name */
  64 #define OUTPUT          PROGNAME ".out" /* default output file */
  65
  66 static int listing=0;                   /* list bytecodes? */
  67 static int dumping = 1;         /* dump bytecodes? */
  68 static int stripping = 0;       /* strip debug information? */
  69 static char Output[] = { OUTPUT };      /* default output file name */
  70
  71 static const char *output = Output;     /* actual output file name */
  72 static const char *progname = PROGNAME; /* actual program name */
  73
  74 @ @c
  75 __attribute__ ((noreturn))
  76 static void fatal(const char *message)
  77 {
  78  fprintf(stderr,"%s: %s\n",progname,message);
  79  exit(EXIT_FAILURE);
  80 }
  81
  82 @ @c
  83 __attribute__ ((noreturn))
  84 static void cannot(const char *what)
  85 {
  86  fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno));
  87  exit(EXIT_FAILURE);
  88 }
  89
  90 @ @c
  91 __attribute__ ((noreturn))
  92 static void usage(const char* message)
  93 {
  94  if (*message=='-')
  95   fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message);
  96  else
  97   fprintf(stderr,"%s: %s\n",progname,message);
  98  fprintf(stderr,
  99   "usage: %s [options] [filenames]\n"
 100   "Available options are:\n"
 101   "  -l       list (use -l -l for full listing)\n"
 102   "  -o name  output to file " LUA_QL("name") " (default is \"%s\")\n"
 103   "  -p       parse only\n"
 104   "  -s       strip debug information\n"
 105   "  -v       show version information\n"
 106   "  --       stop handling options\n"
 107   "  -        stop handling options and process stdin\n"
 108   ,progname,Output);
 109  exit(EXIT_FAILURE);
 110 }
 111
 112 @ @c
 113 #define IS(s)   (strcmp(argv[i],s)==0)
 114
 115 static int doargs(int argc, char* argv[])
 116 {
 117  int i;
 118  int version=0;
 119  if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
 120  for (i=1; i<argc; i++)
 121  {
 122   if (*argv[i]!='-')                    /* end of options; keep it */
 123    break;
 124   else if (IS("--"))                    /* end of options; skip it */
 125   {
 126    ++i;
 127    if (version) ++version;
 128    break;
 129   }
 130   else if (IS("-"))                     /* end of options; use stdin */
 131    break;
 132   else if (IS("-l"))                    /* list */
 133    ++listing;
 134   else if (IS("-o"))                    /* output file */
 135   {
 136    output=argv[++i];
 137    if (output==NULL || *output==0 || (*output=='-' && output[1]!=0))
 138     usage(LUA_QL("-o") " needs argument");
 139    if (IS("-")) output=NULL;
 140   }
 141   else if (IS("-p"))                    /* parse only */
 142    dumping=0;
 143   else if (IS("-s"))                    /* strip debug information */
 144    stripping=1;
 145   else if (IS("-v"))                    /* show version */
 146    ++version;
 147   else                                  /* unknown option */
 148    usage(argv[i]);
 149  }
 150  if (i==argc && (listing || !dumping))
 151  {
 152   dumping=0;
 153   argv[--i]=Output;
 154  }
 155  if (version)
 156  {
 157   printf("%s\n",LUA_COPYRIGHT);
 158   if (version==argc-1) exit(EXIT_SUCCESS);
 159  }
 160  return i;
 161 }
 162
 163 @ @c
 164 #define FUNCTION "(function()end)();"
 165
 166 static const char* reader(lua_State *L, void *ud, size_t *size)
 167 {
 168  UNUSED(L);
 169  if ((*(int*)ud)--)
 170  {
 171   *size=sizeof(FUNCTION)-1;
 172   return FUNCTION;
 173  }
 174  else
 175  {
 176   *size=0;
 177   return NULL;
 178  }
 179 }
 180
 181 #define toproto(L,i) getproto(L->top+(i))
 182
 183 static const Proto* combine(lua_State* L, int n)
 184 {
 185  if (n==1)
 186   return toproto(L,-1);
 187  else
 188  {
 189   Proto* f;
 190   int i=n;
 191   if (lua_load(L,reader,&i,"=(" PROGNAME ")",NULL)!=LUA_OK) fatal(lua_tostring(L,-1));
 192   f=toproto(L,-1);
 193   for (i=0; i<n; i++)
 194   {
 195    f->p[i]=toproto(L,i-n-1);
 196    if (f->p[i]->sizeupvalues>0) f->p[i]->upvalues[0].instack=0;
 197   }
 198   f->sizelineinfo=0;
 199   return f;
 200  }
 201 }
 202
 203 @ @c
 204 static int writer(lua_State* L, const void* p, size_t size, void* u)
 205 {
 206  UNUSED(L);
 207  return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0);
 208 }
 209
 210 static int pmain(lua_State* L)
 211 {
 212  int argc=(int)lua_tointeger(L,1);
 213  char** argv=(char**)lua_touserdata(L,2);
 214  const Proto* f;
 215  int i;
 216  if (!lua_checkstack(L,argc)) fatal("too many input files");
 217  /* open standard libraries:    */
 218  /* we need to to this to keep */
 219  /* the symbol luaL_openlibs   */
 220  luaL_checkversion(L);
 221  lua_gc(L, LUA_GCSTOP, 0);  /* stop collector during initialization */
 222  luaL_openlibs(L);  /* open libraries */
 223  lua_gc(L, LUA_GCRESTART, 0);
 224  for (i=0; i<argc; i++)
 225  {
 226   const char* filename=IS("-") ? NULL : argv[i];
 227   if (luaL_loadfile(L,filename)!=LUA_OK) fatal(lua_tostring(L,-1));
 228  }
 229  f=combine(L,argc);
 230  if (listing) luaU_print(f,listing>1);
 231  if (dumping)
 232  {
 233   FILE* D= (output==NULL) ? stdout : fopen(output,"wb");
 234   if (D==NULL) cannot("open");
 235   lua_lock(L);
 236   luaU_dump(L,f,writer,D,stripping);
 237   lua_unlock(L);
 238   if (ferror(D)) cannot("write");
 239   if (fclose(D)) cannot("close");
 240  }
 241  return 0;
 242 }
 243
 244 @ @c
 245 int luac_main(int ac, char *av[])
 246 {
 247     lua_State *L;
 248     int i = doargs(ac, av);
 249     ac -= i;
 250     av += i;
 251     if (ac <= 0)
 252         usage("no input files given");
 253     L=luaL_newstate();
 254     if (L == NULL)
 255         fatal("not enough memory for state");
 256     lua_pushcfunction(L,&pmain);
 257     lua_pushinteger(L,ac);
 258     lua_pushlightuserdata(L,av);
 259     if (lua_pcall(L,2,0,0)!=LUA_OK)
 260       fatal(lua_tostring(L,-1));
 261     lua_close(L);
 262     return EXIT_SUCCESS;
 263 }
 264
 265 /*
 266 ** print bytecodes
 267 ** See Copyright Notice in lua.h
 268 */
 269
 270 #define VOID(p)         ((const void*)(p))
 271
 272 static void PrintString(const TString* ts)
 273 {
 274  const char* s=getstr(ts);
 275  size_t i,n=ts->tsv.len;
 276  printf("%c",'"');
 277  for (i=0; i<n; i++)
 278  {
 279   int c=(int)(unsigned char)s[i];
 280   switch (c)
 281   {
 282    case '"':  printf("\\\""); break;
 283    case '\\': printf("\\\\"); break;
 284    case '\a': printf("\\a"); break;
 285    case '\b': printf("\\b"); break;
 286    case '\f': printf("\\f"); break;
 287    case '\n': printf("\\n"); break;
 288    case '\r': printf("\\r"); break;
 289    case '\t': printf("\\t"); break;
 290    case '\v': printf("\\v"); break;
 291    default:     if (isprint(c))
 292                         printf("%c",c);
 293                 else
 294                         printf("\\%03d",c);
 295   }
 296  }
 297  printf("%c",'"');
 298 }
 299
 300 static void PrintConstant(const Proto* f, int i)
 301 {
 302  const TValue* o=&f->k[i];
 303  switch (ttype(o))
 304  {
 305   case LUA_TNIL:
 306         printf("nil");
 307         break;
 308   case LUA_TBOOLEAN:
 309         printf(bvalue(o) ? "true" : "false");
 310         break;
 311   case LUA_TNUMBER:
 312         printf(LUA_NUMBER_FMT,nvalue(o));
 313         break;
 314   case LUA_TSTRING:
 315         PrintString(rawtsvalue(o));
 316         break;
 317   default:                              /* cannot happen */
 318         printf("? type=%d",ttype(o));
 319         break;
 320  }
 321 }
 322
 323 #define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-")
 324 #define MYK(x)          (-1-(x))
 325
 326 static void PrintCode(const Proto* f)
 327 {
 328  const Instruction* code=f->code;
 329  int pc,n=f->sizecode;
 330  for (pc=0; pc<n; pc++)
 331  {
 332   Instruction i=code[pc];
 333   OpCode o=GET_OPCODE(i);
 334   int a=GETARG_A(i);
 335   int b=GETARG_B(i);
 336   int c=GETARG_C(i);
 337   int ax=GETARG_Ax(i);
 338   int bx=GETARG_Bx(i);
 339   int sbx=GETARG_sBx(i);
 340   int line=getfuncline(f,pc);
 341   printf("\t%d\t",pc+1);
 342   if (line>0) printf("[%d]\t",line); else printf("[-]\t");
 343   printf("%-9s\t",luaP_opnames[o]);
 344   switch (getOpMode(o))
 345   {
 346    case iABC:
 347     printf("%d",a);
 348     if (getBMode(o)!=OpArgN) printf(" %d",ISK(b) ? (MYK(INDEXK(b))) : b);
 349     if (getCMode(o)!=OpArgN) printf(" %d",ISK(c) ? (MYK(INDEXK(c))) : c);
 350     break;
 351    case iABx:
 352     printf("%d",a);
 353     if (getBMode(o)==OpArgK) printf(" %d",MYK(bx));
 354     if (getBMode(o)==OpArgU) printf(" %d",bx);
 355     break;
 356    case iAsBx:
 357     printf("%d %d",a,sbx);
 358     break;
 359    case iAx:
 360     printf("%d",MYK(ax));
 361     break;
 362   }
 363   switch (o)
 364   {
 365    case OP_LOADK:
 366     printf("\t; "); PrintConstant(f,bx);
 367     break;
 368    case OP_GETUPVAL:
 369    case OP_SETUPVAL:
 370     printf("\t; %s",UPVALNAME(b));
 371     break;
 372    case OP_GETTABUP:
 373     printf("\t; %s",UPVALNAME(b));
 374     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
 375     break;
 376    case OP_SETTABUP:
 377     printf("\t; %s",UPVALNAME(a));
 378     if (ISK(b)) { printf(" "); PrintConstant(f,INDEXK(b)); }
 379     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
 380     break;
 381    case OP_GETTABLE:
 382    case OP_SELF:
 383     if (ISK(c)) { printf("\t; "); PrintConstant(f,INDEXK(c)); }
 384     break;
 385    case OP_SETTABLE:
 386    case OP_ADD:
 387    case OP_SUB:
 388    case OP_MUL:
 389    case OP_DIV:
 390    case OP_POW:
 391    case OP_EQ:
 392    case OP_LT:
 393    case OP_LE:
 394     if (ISK(b) || ISK(c))
 395     {
 396      printf("\t; ");
 397      if (ISK(b)) PrintConstant(f,INDEXK(b)); else printf("-");
 398      printf(" ");
 399      if (ISK(c)) PrintConstant(f,INDEXK(c)); else printf("-");
 400     }
 401     break;
 402    case OP_JMP:
 403    case OP_FORLOOP:
 404    case OP_FORPREP:
 405    case OP_TFORLOOP:
 406     printf("\t; to %d",sbx+pc+2);
 407     break;
 408    case OP_CLOSURE:
 409     printf("\t; %p",VOID(f->p[bx]));
 410     break;
 411    case OP_SETLIST:
 412     if (c==0) printf("\t; %d",(int)code[++pc]); else printf("\t; %d",c);
 413     break;
 414    case OP_EXTRAARG:
 415     printf("\t; "); PrintConstant(f,ax);
 416     break;
 417    default:
 418     break;
 419   }
 420   printf("\n");
 421  }
 422 }
 423
 424 #define SS(x)   ((x==1)?"":"s")
 425 #define S(x)    (int)(x),SS(x)
 426
 427 static void PrintHeader(const Proto* f)
 428 {
 429  const char* s=f->source ? getstr(f->source) : "=?";
 430  if (*s=='@@' || *s=='=')
 431   s++;
 432  else if (*s==LUA_SIGNATURE[0])
 433   s="(bstring)";
 434  else
 435   s="(string)";
 436  printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n",
 437         (f->linedefined==0)?"main":"function",s,
 438         f->linedefined,f->lastlinedefined,
 439         S(f->sizecode),VOID(f));
 440  printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
 441         (int)(f->numparams),f->is_vararg?"+":"",SS(f->numparams),
 442         S(f->maxstacksize),S(f->sizeupvalues));
 443  printf("%d local%s, %d constant%s, %d function%s\n",
 444         S(f->sizelocvars),S(f->sizek),S(f->sizep));
 445 }
 446
 447 static void PrintDebug(const Proto* f)
 448 {
 449  int i,n;
 450  n=f->sizek;
 451  printf("constants (%d) for %p:\n",n,VOID(f));
 452  for (i=0; i<n; i++)
 453  {
 454   printf("\t%d\t",i+1);
 455   PrintConstant(f,i);
 456   printf("\n");
 457  }
 458  n=f->sizelocvars;
 459  printf("locals (%d) for %p:\n",n,VOID(f));
 460  for (i=0; i<n; i++)
 461  {
 462   printf("\t%d\t%s\t%d\t%d\n",
 463   i,getstr(f->locvars[i].varname),f->locvars[i].startpc+1,f->locvars[i].endpc+1);
 464  }
 465  n=f->sizeupvalues;
 466  printf("upvalues (%d) for %p:\n",n,VOID(f));
 467  for (i=0; i<n; i++)
 468  {
 469   printf("\t%d\t%s\t%d\t%d\n",
 470   i,UPVALNAME(i),f->upvalues[i].instack,f->upvalues[i].idx);
 471  }
 472 }
 473
 474 static void PrintFunction(const Proto* f, int full)
 475 {
 476  int i,n=f->sizep;
 477  PrintHeader(f);
 478  PrintCode(f);
 479  if (full) PrintDebug(f);
 480  for (i=0; i<n; i++) PrintFunction(f->p[i],full);
 481 }