external/mit/lua/dist/src/luac.c

   1 /*      $NetBSD: luac.c,v 1.4 2015/10/08 13:21:00 mbalmer Exp $ */
   2
   3 /*
   4 ** Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp
   5 ** Lua compiler (saves bytecodes to files; also lists bytecodes)
   6 ** See Copyright Notice in lua.h
   7 */
   8
   9 #define luac_c
  10 #define LUA_CORE
  11
  12 #include "lprefix.h"
  13
  14 #include <ctype.h>
  15 #include <errno.h>
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19
  20 #include "lua.h"
  21 #include "lauxlib.h"
  22
  23 #include "lobject.h"
  24 #include "lstate.h"
  25 #include "lundump.h"
  26
  27 static void PrintFunction(const Proto* f, int full);
  28 #define luaU_print      PrintFunction
  29
  30 #define PROGNAME        "luac"          /* default program name */
  31 #define OUTPUT          PROGNAME ".out" /* default output file */
  32
  33 static int listing=0;                   /* list bytecodes? */
  34 static int dumping=1;                   /* dump bytecodes? */
  35 static int stripping=0;                 /* strip debug information? */
  36 static char Output[]={ OUTPUT };        /* default output file name */
  37 static const char* output=Output;       /* actual output file name */
  38 static const char* progname=PROGNAME;   /* actual program name */
  39
  40 static void fatal(const char* message)
  41 {
  42  fprintf(stderr,"%s: %s\n",progname,message);
  43  exit(EXIT_FAILURE);
  44 }
  45
  46 static void cannot(const char* what)
  47 {
  48  fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno));
  49  exit(EXIT_FAILURE);
  50 }
  51
  52 static void usage(const char* message)
  53 {
  54  if (*message=='-')
  55   fprintf(stderr,"%s: unrecognized option '%s'\n",progname,message);
  56  else
  57   fprintf(stderr,"%s: %s\n",progname,message);
  58  fprintf(stderr,
  59   "usage: %s [options] [filenames]\n"
  60   "Available options are:\n"
  61   "  -l       list (use -l -l for full listing)\n"
  62   "  -o name  output to file 'name' (default is \"%s\")\n"
  63   "  -p       parse only\n"
  64   "  -s       strip debug information\n"
  65   "  -v       show version information\n"
  66   "  --       stop handling options\n"
  67   "  -        stop handling options and process stdin\n"
  68   ,progname,Output);
  69  exit(EXIT_FAILURE);
  70 }
  71
  72 #define IS(s)   (strcmp(argv[i],s)==0)
  73
  74 static int doargs(int argc, char* argv[])
  75 {
  76  int i;
  77  int version=0;
  78  if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
  79  for (i=1; i<argc; i++)
  80  {
  81   if (*argv[i]!='-')                    /* end of options; keep it */
  82    break;
  83   else if (IS("--"))                    /* end of options; skip it */
  84   {
  85    ++i;
  86    if (version) ++version;
  87    break;
  88   }
  89   else if (IS("-"))                     /* end of options; use stdin */
  90    break;
  91   else if (IS("-l"))                    /* list */
  92    ++listing;
  93   else if (IS("-o"))                    /* output file */
  94   {
  95    output=argv[++i];
  96    if (output==NULL || *output==0 || (*output=='-' && output[1]!=0))
  97     usage("'-o' needs argument");
  98    if (IS("-")) output=NULL;
  99   }
 100   else if (IS("-p"))                    /* parse only */
 101    dumping=0;
 102   else if (IS("-s"))                    /* strip debug information */
 103    stripping=1;
 104   else if (IS("-v"))                    /* show version */
 105    ++version;
 106   else                                  /* unknown option */
 107    usage(argv[i]);
 108  }
 109  if (i==argc && (listing || !dumping))
 110  {
 111   dumping=0;
 112   argv[--i]=Output;
 113  }
 114  if (version)
 115  {
 116   printf("%s\n",LUA_COPYRIGHT);
 117   if (version==argc-1) exit(EXIT_SUCCESS);
 118  }
 119  return i;
 120 }
 121
 122 #define FUNCTION "(function()end)();"
 123
 124 static const char* reader(lua_State *L, void *ud, size_t *size)
 125 {
 126  UNUSED(L);
 127  if ((*(int*)ud)--)
 128  {
 129   *size=sizeof(FUNCTION)-1;
 130   return FUNCTION;
 131  }
 132  else
 133  {
 134   *size=0;
 135   return NULL;
 136  }
 137 }
 138
 139 #define toproto(L,i) getproto(L->top+(i))
 140
 141 static const Proto* combine(lua_State* L, int n)
 142 {
 143  if (n==1)
 144   return toproto(L,-1);
 145  else
 146  {
 147   Proto* f;
 148   int i=n;
 149   if (lua_load(L,reader,&i,"=(" PROGNAME ")",NULL)!=LUA_OK) fatal(lua_tostring(L,-1));
 150   f=toproto(L,-1);
 151   for (i=0; i<n; i++)
 152   {
 153    f->p[i]=toproto(L,i-n-1);
 154    if (f->p[i]->sizeupvalues>0) f->p[i]->upvalues[0].instack=0;
 155   }
 156   f->sizelineinfo=0;
 157   return f;
 158  }
 159 }
 160
 161 static int writer(lua_State* L, const void* p, size_t size, void* u)
 162 {
 163  UNUSED(L);
 164  return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0);
 165 }
 166
 167 static int pmain(lua_State* L)
 168 {
 169  int argc=(int)lua_tointeger(L,1);
 170  char** argv=(char**)lua_touserdata(L,2);
 171  const Proto* f;
 172  int i;
 173  if (!lua_checkstack(L,argc)) fatal("too many input files");
 174  for (i=0; i<argc; i++)
 175  {
 176   const char* filename=IS("-") ? NULL : argv[i];
 177   if (luaL_loadfile(L,filename)!=LUA_OK) fatal(lua_tostring(L,-1));
 178  }
 179  f=combine(L,argc);
 180  if (listing) luaU_print(f,listing>1);
 181  if (dumping)
 182  {
 183   FILE* D= (output==NULL) ? stdout : fopen(output,"wb");
 184   if (D==NULL) cannot("open");
 185   lua_lock(L);
 186   luaU_dump(L,f,writer,D,stripping);
 187   lua_unlock(L);
 188   if (ferror(D)) cannot("write");
 189   if (fclose(D)) cannot("close");
 190  }
 191  return 0;
 192 }
 193
 194 int main(int argc, char* argv[])
 195 {
 196  lua_State* L;
 197  int i=doargs(argc,argv);
 198  argc-=i; argv+=i;
 199  if (argc<=0) usage("no input files given");
 200  L=luaL_newstate();
 201  if (L==NULL) fatal("cannot create state: not enough memory");
 202  lua_pushcfunction(L,&pmain);
 203  lua_pushinteger(L,argc);
 204  lua_pushlightuserdata(L,argv);
 205  if (lua_pcall(L,2,0,0)!=LUA_OK) fatal(lua_tostring(L,-1));
 206  lua_close(L);
 207  return EXIT_SUCCESS;
 208 }
 209
 210 /*
 211 ** Id: luac.c,v 1.75 2015/03/12 01:58:27 lhf Exp
 212 ** print bytecodes
 213 ** See Copyright Notice in lua.h
 214 */
 215
 216 #include <ctype.h>
 217 #include <stdio.h>
 218
 219 #define luac_c
 220 #define LUA_CORE
 221
 222 #include "ldebug.h"
 223 #include "lobject.h"
 224 #include "lopcodes.h"
 225
 226 #define VOID(p)         ((const void*)(p))
 227
 228 static void PrintString(const TString* ts)
 229 {
 230  const char* s=getstr(ts);
 231  size_t i,n=tsslen(ts);
 232  printf("%c",'"');
 233  for (i=0; i<n; i++)
 234  {
 235   int c=(int)(unsigned char)s[i];
 236   switch (c)
 237   {
 238    case '"':  printf("\\\""); break;
 239    case '\\': printf("\\\\"); break;
 240    case '\a': printf("\\a"); break;
 241    case '\b': printf("\\b"); break;
 242    case '\f': printf("\\f"); break;
 243    case '\n': printf("\\n"); break;
 244    case '\r': printf("\\r"); break;
 245    case '\t': printf("\\t"); break;
 246    case '\v': printf("\\v"); break;
 247    default:     if (isprint(c))
 248                         printf("%c",c);
 249                 else
 250                         printf("\\%03d",c);
 251   }
 252  }
 253  printf("%c",'"');
 254 }
 255
 256 static void PrintConstant(const Proto* f, int i)
 257 {
 258  const TValue* o=&f->k[i];
 259  switch (ttype(o))
 260  {
 261   case LUA_TNIL:
 262         printf("nil");
 263         break;
 264   case LUA_TBOOLEAN:
 265         printf(bvalue(o) ? "true" : "false");
 266         break;
 267   case LUA_TNUMFLT:
 268         {
 269         char buff[100];
 270         sprintf(buff,LUA_NUMBER_FMT,fltvalue(o));
 271         printf("%s",buff);
 272         if (buff[strspn(buff,"-0123456789")]=='\0') printf(".0");
 273         break;
 274         }
 275   case LUA_TNUMINT:
 276         printf(LUA_INTEGER_FMT,ivalue(o));
 277         break;
 278   case LUA_TSHRSTR: case LUA_TLNGSTR:
 279         PrintString(tsvalue(o));
 280         break;
 281   default:                              /* cannot happen */
 282         printf("? type=%d",ttype(o));
 283         break;
 284  }
 285 }
 286
 287 #define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-")
 288 #define MYK(x)          (-1-(x))
 289
 290 static void PrintCode(const Proto* f)
 291 {
 292  const Instruction* code=f->code;
 293  int pc,n=f->sizecode;
 294  for (pc=0; pc<n; pc++)
 295  {
 296   Instruction i=code[pc];
 297   OpCode o=GET_OPCODE(i);
 298   int a=GETARG_A(i);
 299   int b=GETARG_B(i);
 300   int c=GETARG_C(i);
 301   int ax=GETARG_Ax(i);
 302   int bx=GETARG_Bx(i);
 303   int sbx=GETARG_sBx(i);
 304   int line=getfuncline(f,pc);
 305   printf("\t%d\t",pc+1);
 306   if (line>0) printf("[%d]\t",line); else printf("[-]\t");
 307   printf("%-9s\t",luaP_opnames[o]);
 308   switch (getOpMode(o))
 309   {
 310    case iABC:
 311     printf("%d",a);
 312     if (getBMode(o)!=OpArgN) printf(" %d",ISK(b) ? (MYK(INDEXK(b))) : b);
 313     if (getCMode(o)!=OpArgN) printf(" %d",ISK(c) ? (MYK(INDEXK(c))) : c);
 314     break;
 315    case iABx:
 316     printf("%d",a);
 317     if (getBMode(o)==OpArgK) printf(" %d",MYK(bx));
 318     if (getBMode(o)==OpArgU) printf(" %d",bx);
 319     break;
 320    case iAsBx:
 321     printf("%d %d",a,sbx);
 322     break;
 323    case iAx:
 324     printf("%d",MYK(ax));
 325     break;
 326   }
 327   switch (o)
 328   {
 329    case OP_LOADK:
 330     printf("\t; "); PrintConstant(f,bx);
 331     break;
 332    case OP_GETUPVAL:
 333    case OP_SETUPVAL:
 334     printf("\t; %s",UPVALNAME(b));
 335     break;
 336    case OP_GETTABUP:
 337     printf("\t; %s",UPVALNAME(b));
 338     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
 339     break;
 340    case OP_SETTABUP:
 341     printf("\t; %s",UPVALNAME(a));
 342     if (ISK(b)) { printf(" "); PrintConstant(f,INDEXK(b)); }
 343     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
 344     break;
 345    case OP_GETTABLE:
 346    case OP_SELF:
 347     if (ISK(c)) { printf("\t; "); PrintConstant(f,INDEXK(c)); }
 348     break;
 349    case OP_SETTABLE:
 350    case OP_ADD:
 351    case OP_SUB:
 352    case OP_MUL:
 353    case OP_POW:
 354    case OP_DIV:
 355    case OP_IDIV:
 356    case OP_BAND:
 357    case OP_BOR:
 358    case OP_BXOR:
 359    case OP_SHL:
 360    case OP_SHR:
 361    case OP_EQ:
 362    case OP_LT:
 363    case OP_LE:
 364     if (ISK(b) || ISK(c))
 365     {
 366      printf("\t; ");
 367      if (ISK(b)) PrintConstant(f,INDEXK(b)); else printf("-");
 368      printf(" ");
 369      if (ISK(c)) PrintConstant(f,INDEXK(c)); else printf("-");
 370     }
 371     break;
 372    case OP_JMP:
 373    case OP_FORLOOP:
 374    case OP_FORPREP:
 375    case OP_TFORLOOP:
 376     printf("\t; to %d",sbx+pc+2);
 377     break;
 378    case OP_CLOSURE:
 379     printf("\t; %p",VOID(f->p[bx]));
 380     break;
 381    case OP_SETLIST:
 382     if (c==0) printf("\t; %d",(int)code[++pc]); else printf("\t; %d",c);
 383     break;
 384    case OP_EXTRAARG:
 385     printf("\t; "); PrintConstant(f,ax);
 386     break;
 387    default:
 388     break;
 389   }
 390   printf("\n");
 391  }
 392 }
 393
 394 #define SS(x)   ((x==1)?"":"s")
 395 #define S(x)    (int)(x),SS(x)
 396
 397 static void PrintHeader(const Proto* f)
 398 {
 399  const char* s=f->source ? getstr(f->source) : "=?";
 400  if (*s=='@' || *s=='=')
 401   s++;
 402  else if (*s==LUA_SIGNATURE[0])
 403   s="(bstring)";
 404  else
 405   s="(string)";
 406  printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n",
 407         (f->linedefined==0)?"main":"function",s,
 408         f->linedefined,f->lastlinedefined,
 409         S(f->sizecode),VOID(f));
 410  printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
 411         (int)(f->numparams),f->is_vararg?"+":"",SS(f->numparams),
 412         S(f->maxstacksize),S(f->sizeupvalues));
 413  printf("%d local%s, %d constant%s, %d function%s\n",
 414         S(f->sizelocvars),S(f->sizek),S(f->sizep));
 415 }
 416
 417 static void PrintDebug(const Proto* f)
 418 {
 419  int i,n;
 420  n=f->sizek;
 421  printf("constants (%d) for %p:\n",n,VOID(f));
 422  for (i=0; i<n; i++)
 423  {
 424   printf("\t%d\t",i+1);
 425   PrintConstant(f,i);
 426   printf("\n");
 427  }
 428  n=f->sizelocvars;
 429  printf("locals (%d) for %p:\n",n,VOID(f));
 430  for (i=0; i<n; i++)
 431  {
 432   printf("\t%d\t%s\t%d\t%d\n",
 433   i,getstr(f->locvars[i].varname),f->locvars[i].startpc+1,f->locvars[i].endpc+1);
 434  }
 435  n=f->sizeupvalues;
 436  printf("upvalues (%d) for %p:\n",n,VOID(f));
 437  for (i=0; i<n; i++)
 438  {
 439   printf("\t%d\t%s\t%d\t%d\n",
 440   i,UPVALNAME(i),f->upvalues[i].instack,f->upvalues[i].idx);
 441  }
 442 }
 443
 444 static void PrintFunction(const Proto* f, int full)
 445 {
 446  int i,n=f->sizep;
 447  PrintHeader(f);
 448  PrintCode(f);
 449  if (full) PrintDebug(f);
 450  for (i=0; i<n; i++) PrintFunction(f->p[i],full);
 451 }