xref: /freebsd/contrib/lua/src/luac.c (revision b9f654b163bce26de79705e77b872427c9f2afa1) 
1 /*
2 ** $Id: luac.c,v 1.76 2018/06/19 01:32:02 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 1.76 2018/06/19 01:32:02 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_MOD:
352    case OP_POW:
353    case OP_DIV:
354    case OP_IDIV:
355    case OP_BAND:
356    case OP_BOR:
357    case OP_BXOR:
358    case OP_SHL:
359    case OP_SHR:
360    case OP_EQ:
361    case OP_LT:
362    case OP_LE:
363     if (ISK(b) || ISK(c))
364     {
365      printf("\t; ");
366      if (ISK(b)) PrintConstant(f,INDEXK(b)); else printf("-");
367      printf(" ");
368      if (ISK(c)) PrintConstant(f,INDEXK(c)); else printf("-");
369     }
370     break;
371    case OP_JMP:
372    case OP_FORLOOP:
373    case OP_FORPREP:
374    case OP_TFORLOOP:
375     printf("\t; to %d",sbx+pc+2);
376     break;
377    case OP_CLOSURE:
378     printf("\t; %p",VOID(f->p[bx]));
379     break;
380    case OP_SETLIST:
381     if (c==0) printf("\t; %d",(int)code[++pc]); else printf("\t; %d",c);
382     break;
383    case OP_EXTRAARG:
384     printf("\t; "); PrintConstant(f,ax);
385     break;
386    default:
387     break;
388   }
389   printf("\n");
390  }
391 }
392 
393 #define SS(x)	((x==1)?"":"s")
394 #define S(x)	(int)(x),SS(x)
395 
396 static void PrintHeader(const Proto* f)
397 {
398  const char* s=f->source ? getstr(f->source) : "=?";
399  if (*s=='@' || *s=='=')
400   s++;
401  else if (*s==LUA_SIGNATURE[0])
402   s="(bstring)";
403  else
404   s="(string)";
405  printf("\n%s <%s:%d,%d> (%d instruction%s at %p)\n",
406  	(f->linedefined==0)?"main":"function",s,
407 	f->linedefined,f->lastlinedefined,
408 	S(f->sizecode),VOID(f));
409  printf("%d%s param%s, %d slot%s, %d upvalue%s, ",
410 	(int)(f->numparams),f->is_vararg?"+":"",SS(f->numparams),
411 	S(f->maxstacksize),S(f->sizeupvalues));
412  printf("%d local%s, %d constant%s, %d function%s\n",
413 	S(f->sizelocvars),S(f->sizek),S(f->sizep));
414 }
415 
416 static void PrintDebug(const Proto* f)
417 {
418  int i,n;
419  n=f->sizek;
420  printf("constants (%d) for %p:\n",n,VOID(f));
421  for (i=0; i<n; i++)
422  {
423   printf("\t%d\t",i+1);
424   PrintConstant(f,i);
425   printf("\n");
426  }
427  n=f->sizelocvars;
428  printf("locals (%d) for %p:\n",n,VOID(f));
429  for (i=0; i<n; i++)
430  {
431   printf("\t%d\t%s\t%d\t%d\n",
432   i,getstr(f->locvars[i].varname),f->locvars[i].startpc+1,f->locvars[i].endpc+1);
433  }
434  n=f->sizeupvalues;
435  printf("upvalues (%d) for %p:\n",n,VOID(f));
436  for (i=0; i<n; i++)
437  {
438   printf("\t%d\t%s\t%d\t%d\n",
439   i,UPVALNAME(i),f->upvalues[i].instack,f->upvalues[i].idx);
440  }
441 }
442 
443 static void PrintFunction(const Proto* f, int full)
444 {
445  int i,n=f->sizep;
446  PrintHeader(f);
447  PrintCode(f);
448  if (full) PrintDebug(f);
449  for (i=0; i<n; i++) PrintFunction(f->p[i],full);
450 }
451