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
fatal(const char * message)38 static void fatal(const char* message)
39 {
40 fprintf(stderr,"%s: %s\n",progname,message);
41 exit(EXIT_FAILURE);
42 }
43
cannot(const char * what)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
usage(const char * message)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
doargs(int argc,char * argv[])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
reader(lua_State * L,void * ud,size_t * size)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
combine(lua_State * L,int n)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
writer(lua_State * L,const void * p,size_t size,void * u)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
pmain(lua_State * L)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
main(int argc,char * argv[])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
PrintString(const TString * ts)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
PrintConstant(const Proto * f,int i)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
PrintCode(const Proto * f)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
PrintHeader(const Proto * f)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
PrintDebug(const Proto * f)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
PrintFunction(const Proto * f,int full)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