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
22static 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
28static int listing=0;			/* list bytecodes? */
29static int dumping=1;			/* dump bytecodes? */
30static int stripping=0;			/* strip debug information? */
31static char Output[]={ OUTPUT };	/* default output file name */
32static const char* output=Output;	/* actual output file name */
33static const char* progname=PROGNAME;	/* actual program name */
34
35static void fatal(const char* message)
36{
37 fprintf(stderr,"%s: %s\n",progname,message);
38 exit(EXIT_FAILURE);
39}
40
41static 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
47static 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
69static 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
119static 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
136static 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
156static 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
162static 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
189int 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 1.68 2011/09/30 10:21:20 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
223static 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
251static void PrintConstant(const Proto* f, int i)
252{
253 const TValue* o=&f->k[i];
254 switch (ttype(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
277static 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
378static 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
398static 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
425static 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