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      1 /*
      2 ** $Id: luac.c,v 1.69 2011/11/29 17:46:33 lhf Exp $
      3 ** Lua compiler (saves bytecodes to files; also list bytecodes)
      4 ** See Copyright Notice in lua.h
      5 */
      6 
      7 #include <errno.h>
      8 #include <stdio.h>
      9 #include <stdlib.h>
     10 #include <string.h>
     11 
     12 #define luac_c
     13 #define LUA_CORE
     14 
     15 #include "lua.h"
     16 #include "lauxlib.h"
     17 
     18 #include "lobject.h"
     19 #include "lstate.h"
     20 #include "lundump.h"
     21 
     22 static void PrintFunction(const Proto* f, int full);
     23 #define luaU_print	PrintFunction
     24 
     25 #define PROGNAME	"luac"		/* default program name */
     26 #define OUTPUT		PROGNAME ".out"	/* default output file */
     27 
     28 static int listing=0;			/* list bytecodes? */
     29 static int dumping=1;			/* dump bytecodes? */
     30 static int stripping=0;			/* strip debug information? */
     31 static char Output[]={ OUTPUT };	/* default output file name */
     32 static const char* output=Output;	/* actual output file name */
     33 static const char* progname=PROGNAME;	/* actual program name */
     34 
     35 static void fatal(const char* message)
     36 {
     37  fprintf(stderr,"%s: %s\n",progname,message);
     38  exit(EXIT_FAILURE);
     39 }
     40 
     41 static void cannot(const char* what)
     42 {
     43  fprintf(stderr,"%s: cannot %s %s: %s\n",progname,what,output,strerror(errno));
     44  exit(EXIT_FAILURE);
     45 }
     46 
     47 static void usage(const char* message)
     48 {
     49  if (*message=='-')
     50   fprintf(stderr,"%s: unrecognized option " LUA_QS "\n",progname,message);
     51  else
     52   fprintf(stderr,"%s: %s\n",progname,message);
     53  fprintf(stderr,
     54   "usage: %s [options] [filenames]\n"
     55   "Available options are:\n"
     56   "  -l       list (use -l -l for full listing)\n"
     57   "  -o name  output to file " LUA_QL("name") " (default is \"%s\")\n"
     58   "  -p       parse only\n"
     59   "  -s       strip debug information\n"
     60   "  -v       show version information\n"
     61   "  --       stop handling options\n"
     62   "  -        stop handling options and process stdin\n"
     63   ,progname,Output);
     64  exit(EXIT_FAILURE);
     65 }
     66 
     67 #define IS(s)	(strcmp(argv[i],s)==0)
     68 
     69 static int doargs(int argc, char* argv[])
     70 {
     71  int i;
     72  int version=0;
     73  if (argv[0]!=NULL && *argv[0]!=0) progname=argv[0];
     74  for (i=1; i<argc; i++)
     75  {
     76   if (*argv[i]!='-')			/* end of options; keep it */
     77    break;
     78   else if (IS("--"))			/* end of options; skip it */
     79   {
     80    ++i;
     81    if (version) ++version;
     82    break;
     83   }
     84   else if (IS("-"))			/* end of options; use stdin */
     85    break;
     86   else if (IS("-l"))			/* list */
     87    ++listing;
     88   else if (IS("-o"))			/* output file */
     89   {
     90    output=argv[++i];
     91    if (output==NULL || *output==0 || (*output=='-' && output[1]!=0))
     92     usage(LUA_QL("-o") " needs argument");
     93    if (IS("-")) output=NULL;
     94   }
     95   else if (IS("-p"))			/* parse only */
     96    dumping=0;
     97   else if (IS("-s"))			/* strip debug information */
     98    stripping=1;
     99   else if (IS("-v"))			/* show version */
    100    ++version;
    101   else					/* unknown option */
    102    usage(argv[i]);
    103  }
    104  if (i==argc && (listing || !dumping))
    105  {
    106   dumping=0;
    107   argv[--i]=Output;
    108  }
    109  if (version)
    110  {
    111   printf("%s\n",LUA_COPYRIGHT);
    112   if (version==argc-1) exit(EXIT_SUCCESS);
    113  }
    114  return i;
    115 }
    116 
    117 #define FUNCTION "(function()end)();"
    118 
    119 static const char* reader(lua_State *L, void *ud, size_t *size)
    120 {
    121  UNUSED(L);
    122  if ((*(int*)ud)--)
    123  {
    124   *size=sizeof(FUNCTION)-1;
    125   return FUNCTION;
    126  }
    127  else
    128  {
    129   *size=0;
    130   return NULL;
    131  }
    132 }
    133 
    134 #define toproto(L,i) getproto(L->top+(i))
    135 
    136 static const Proto* combine(lua_State* L, int n)
    137 {
    138  if (n==1)
    139   return toproto(L,-1);
    140  else
    141  {
    142   Proto* f;
    143   int i=n;
    144   if (lua_load(L,reader,&i,"=(" PROGNAME ")",NULL)!=LUA_OK) fatal(lua_tostring(L,-1));
    145   f=toproto(L,-1);
    146   for (i=0; i<n; i++)
    147   {
    148    f->p[i]=toproto(L,i-n-1);
    149    if (f->p[i]->sizeupvalues>0) f->p[i]->upvalues[0].instack=0;
    150   }
    151   f->sizelineinfo=0;
    152   return f;
    153  }
    154 }
    155 
    156 static int writer(lua_State* L, const void* p, size_t size, void* u)
    157 {
    158  UNUSED(L);
    159  return (fwrite(p,size,1,(FILE*)u)!=1) && (size!=0);
    160 }
    161 
    162 static int pmain(lua_State* L)
    163 {
    164  int argc=(int)lua_tointeger(L,1);
    165  char** argv=(char**)lua_touserdata(L,2);
    166  const Proto* f;
    167  int i;
    168  if (!lua_checkstack(L,argc)) fatal("too many input files");
    169  for (i=0; i<argc; i++)
    170  {
    171   const char* filename=IS("-") ? NULL : argv[i];
    172   if (luaL_loadfile(L,filename)!=LUA_OK) fatal(lua_tostring(L,-1));
    173  }
    174  f=combine(L,argc);
    175  if (listing) luaU_print(f,listing>1);
    176  if (dumping)
    177  {
    178   FILE* D= (output==NULL) ? stdout : fopen(output,"wb");
    179   if (D==NULL) cannot("open");
    180   lua_lock(L);
    181   luaU_dump(L,f,writer,D,stripping);
    182   lua_unlock(L);
    183   if (ferror(D)) cannot("write");
    184   if (fclose(D)) cannot("close");
    185  }
    186  return 0;
    187 }
    188 
    189 int main(int argc, char* argv[])
    190 {
    191  lua_State* L;
    192  int i=doargs(argc,argv);
    193  argc-=i; argv+=i;
    194  if (argc<=0) usage("no input files given");
    195  L=luaL_newstate();
    196  if (L==NULL) fatal("cannot create state: not enough memory");
    197  lua_pushcfunction(L,&pmain);
    198  lua_pushinteger(L,argc);
    199  lua_pushlightuserdata(L,argv);
    200  if (lua_pcall(L,2,0,0)!=LUA_OK) fatal(lua_tostring(L,-1));
    201  lua_close(L);
    202  return EXIT_SUCCESS;
    203 }
    204 
    205 /*
    206 ** $Id: print.c,v 1.69 2013/07/04 01:03:46 lhf Exp $
    207 ** print bytecodes
    208 ** See Copyright Notice in lua.h
    209 */
    210 
    211 #include <ctype.h>
    212 #include <stdio.h>
    213 
    214 #define luac_c
    215 #define LUA_CORE
    216 
    217 #include "ldebug.h"
    218 #include "lobject.h"
    219 #include "lopcodes.h"
    220 
    221 #define VOID(p)		((const void*)(p))
    222 
    223 static void PrintString(const TString* ts)
    224 {
    225  const char* s=getstr(ts);
    226  size_t i,n=ts->tsv.len;
    227  printf("%c",'"');
    228  for (i=0; i<n; i++)
    229  {
    230   int c=(int)(unsigned char)s[i];
    231   switch (c)
    232   {
    233    case '"':  printf("\\\""); break;
    234    case '\\': printf("\\\\"); break;
    235    case '\a': printf("\\a"); break;
    236    case '\b': printf("\\b"); break;
    237    case '\f': printf("\\f"); break;
    238    case '\n': printf("\\n"); break;
    239    case '\r': printf("\\r"); break;
    240    case '\t': printf("\\t"); break;
    241    case '\v': printf("\\v"); break;
    242    default:	if (isprint(c))
    243    			printf("%c",c);
    244 		else
    245 			printf("\\%03d",c);
    246   }
    247  }
    248  printf("%c",'"');
    249 }
    250 
    251 static void PrintConstant(const Proto* f, int i)
    252 {
    253  const TValue* o=&f->k[i];
    254  switch (ttypenv(o))
    255  {
    256   case LUA_TNIL:
    257 	printf("nil");
    258 	break;
    259   case LUA_TBOOLEAN:
    260 	printf(bvalue(o) ? "true" : "false");
    261 	break;
    262   case LUA_TNUMBER:
    263 	printf(LUA_NUMBER_FMT,nvalue(o));
    264 	break;
    265   case LUA_TSTRING:
    266 	PrintString(rawtsvalue(o));
    267 	break;
    268   default:				/* cannot happen */
    269 	printf("? type=%d",ttype(o));
    270 	break;
    271  }
    272 }
    273 
    274 #define UPVALNAME(x) ((f->upvalues[x].name) ? getstr(f->upvalues[x].name) : "-")
    275 #define MYK(x)		(-1-(x))
    276 
    277 static void PrintCode(const Proto* f)
    278 {
    279  const Instruction* code=f->code;
    280  int pc,n=f->sizecode;
    281  for (pc=0; pc<n; pc++)
    282  {
    283   Instruction i=code[pc];
    284   OpCode o=GET_OPCODE(i);
    285   int a=GETARG_A(i);
    286   int b=GETARG_B(i);
    287   int c=GETARG_C(i);
    288   int ax=GETARG_Ax(i);
    289   int bx=GETARG_Bx(i);
    290   int sbx=GETARG_sBx(i);
    291   int line=getfuncline(f,pc);
    292   printf("\t%d\t",pc+1);
    293   if (line>0) printf("[%d]\t",line); else printf("[-]\t");
    294   printf("%-9s\t",luaP_opnames[o]);
    295   switch (getOpMode(o))
    296   {
    297    case iABC:
    298     printf("%d",a);
    299     if (getBMode(o)!=OpArgN) printf(" %d",ISK(b) ? (MYK(INDEXK(b))) : b);
    300     if (getCMode(o)!=OpArgN) printf(" %d",ISK(c) ? (MYK(INDEXK(c))) : c);
    301     break;
    302    case iABx:
    303     printf("%d",a);
    304     if (getBMode(o)==OpArgK) printf(" %d",MYK(bx));
    305     if (getBMode(o)==OpArgU) printf(" %d",bx);
    306     break;
    307    case iAsBx:
    308     printf("%d %d",a,sbx);
    309     break;
    310    case iAx:
    311     printf("%d",MYK(ax));
    312     break;
    313   }
    314   switch (o)
    315   {
    316    case OP_LOADK:
    317     printf("\t; "); PrintConstant(f,bx);
    318     break;
    319    case OP_GETUPVAL:
    320    case OP_SETUPVAL:
    321     printf("\t; %s",UPVALNAME(b));
    322     break;
    323    case OP_GETTABUP:
    324     printf("\t; %s",UPVALNAME(b));
    325     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
    326     break;
    327    case OP_SETTABUP:
    328     printf("\t; %s",UPVALNAME(a));
    329     if (ISK(b)) { printf(" "); PrintConstant(f,INDEXK(b)); }
    330     if (ISK(c)) { printf(" "); PrintConstant(f,INDEXK(c)); }
    331     break;
    332    case OP_GETTABLE:
    333    case OP_SELF:
    334     if (ISK(c)) { printf("\t; "); PrintConstant(f,INDEXK(c)); }
    335     break;
    336    case OP_SETTABLE:
    337    case OP_ADD:
    338    case OP_SUB:
    339    case OP_MUL:
    340    case OP_DIV:
    341    case OP_POW:
    342    case OP_EQ:
    343    case OP_LT:
    344    case OP_LE:
    345     if (ISK(b) || ISK(c))
    346     {
    347      printf("\t; ");
    348      if (ISK(b)) PrintConstant(f,INDEXK(b)); else printf("-");
    349      printf(" ");
    350      if (ISK(c)) PrintConstant(f,INDEXK(c)); else printf("-");
    351     }
    352     break;
    353    case OP_JMP:
    354    case OP_FORLOOP:
    355    case OP_FORPREP:
    356    case OP_TFORLOOP:
    357     printf("\t; to %d",sbx+pc+2);
    358     break;
    359    case OP_CLOSURE:
    360     printf("\t; %p",VOID(f->p[bx]));
    361     break;
    362    case OP_SETLIST:
    363     if (c==0) printf("\t; %d",(int)code[++pc]); else printf("\t; %d",c);
    364     break;
    365    case OP_EXTRAARG:
    366     printf("\t; "); PrintConstant(f,ax);
    367     break;
    368    default:
    369     break;
    370   }
    371   printf("\n");
    372  }
    373 }
    374 
    375 #define SS(x)	((x==1)?"":"s")
    376 #define S(x)	(int)(x),SS(x)
    377 
    378 static void PrintHeader(const Proto* f)
    379 {
    380  const char* s=f->source ? getstr(f->source) : "=?";
    381  if (*s=='@' || *s=='=')
    382   s++;
    383  else if (*s==LUA_SIGNATURE[0])
    384   s="(bstring)";
    385  else
    386   s="(string)";
    387  printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n",
    388  	(f->linedefined==0)?"main":"function",s,
    389 	f->linedefined,f->lastlinedefined,
    390 	S(f->sizecode),VOID(f));
    391  printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
    392 	(int)(f->numparams),f->is_vararg?"+":"",SS(f->numparams),
    393 	S(f->maxstacksize),S(f->sizeupvalues));
    394  printf("%d local%s, %d constant%s, %d function%s\n",
    395 	S(f->sizelocvars),S(f->sizek),S(f->sizep));
    396 }
    397 
    398 static void PrintDebug(const Proto* f)
    399 {
    400  int i,n;
    401  n=f->sizek;
    402  printf("constants (%d) for %p:\n",n,VOID(f));
    403  for (i=0; i<n; i++)
    404  {
    405   printf("\t%d\t",i+1);
    406   PrintConstant(f,i);
    407   printf("\n");
    408  }
    409  n=f->sizelocvars;
    410  printf("locals (%d) for %p:\n",n,VOID(f));
    411  for (i=0; i<n; i++)
    412  {
    413   printf("\t%d\t%s\t%d\t%d\n",
    414   i,getstr(f->locvars[i].varname),f->locvars[i].startpc+1,f->locvars[i].endpc+1);
    415  }
    416  n=f->sizeupvalues;
    417  printf("upvalues (%d) for %p:\n",n,VOID(f));
    418  for (i=0; i<n; i++)
    419  {
    420   printf("\t%d\t%s\t%d\t%d\n",
    421   i,UPVALNAME(i),f->upvalues[i].instack,f->upvalues[i].idx);
    422  }
    423 }
    424 
    425 static void PrintFunction(const Proto* f, int full)
    426 {
    427  int i,n=f->sizep;
    428  PrintHeader(f);
    429  PrintCode(f);
    430  if (full) PrintDebug(f);
    431  for (i=0; i<n; i++) PrintFunction(f->p[i],full);
    432 }
    433