luac.c revision 344220 
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
25static 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
31static int listing=0;			/* list bytecodes? */
32static int dumping=1;			/* dump bytecodes? */
33static int stripping=0;			/* strip debug information? */
34static char Output[]={ OUTPUT };	/* default output file name */
35static const char* output=Output;	/* actual output file name */
36static const char* progname=PROGNAME;	/* actual program name */
37
38static void fatal(const char* message)
39{
40 fprintf(stderr,"%s: %s\n",progname,message);
41 exit(EXIT_FAILURE);
42}
43
44static 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
50static 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
72static 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
122static 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
139static 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
159static 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
165static 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
192int 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
226static 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
254static 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
288static 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
396static 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
416static 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
443static 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