ceph/src/lua/src/luac.c

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