nsz Git - cparser/blob - main.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <stdbool.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <assert.h>
  11
  12 #ifdef _WIN32
  13
  14 #include <fcntl.h>
  15 #include <io.h>
  16
  17 /* no eXecute on Win32 */
  18 #define X_OK 0
  19 #define W_OK 2
  20 #define R_OK 4
  21
  22 #define O_RDWR          _O_RDWR
  23 #define O_CREAT         _O_CREAT
  24 #define O_EXCL          _O_EXCL
  25 #define O_BINARY        _O_BINARY
  26
  27 /* remap some names, we are not in the POSIX world */
  28 #define access(fname, mode)      _access(fname, mode)
  29 #define mktemp(tmpl)             _mktemp(tmpl)
  30 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  31 #define fdopen(fd, mode)         _fdopen(fd, mode)
  32 #define popen(cmd, mode)         _popen(cmd, mode)
  33 #define pclose(file)             _pclose(file)
  34
  35 #else
  36 #include <unistd.h>
  37 #define HAVE_MKSTEMP
  38 #endif
  39
  40 #ifndef WITH_LIBCORE
  41 #define WITH_LIBCORE
  42 #endif
  43
  44 #include <libfirm/firm.h>
  45 #include <libfirm/be.h>
  46
  47 #include "lexer.h"
  48 #include "token_t.h"
  49 #include "types.h"
  50 #include "type_hash.h"
  51 #include "parser.h"
  52 #include "ast2firm.h"
  53 #include "diagnostic.h"
  54 #include "lang_features.h"
  55 #include "driver/firm_opt.h"
  56 #include "driver/firm_cmdline.h"
  57 #include "adt/error.h"
  58 #include "write_fluffy.h"
  59 #include "revision.h"
  60
  61 #ifndef PREPROCESSOR
  62 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
  63 #endif
  64
  65 #ifndef LINKER
  66 #define LINKER    "gcc -m32"
  67 #endif
  68
  69 #ifndef ASSEMBLER
  70 #define ASSEMBLER "as --32"
  71 #endif
  72
  73 /** The current c mode/dialect. */
  74 unsigned int c_mode = _C89|_C99|_GNUC;
  75
  76 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
  77 unsigned int machine_size = 32;
  78
  79 /** true if the char type is signed. */
  80 bool char_is_signed = true;
  81
  82 /** true for strict language checking. */
  83 bool strict_mode = false;
  84
  85 static int            verbose;
  86 static struct obstack cppflags_obst;
  87
  88 #if defined(_DEBUG) || defined(FIRM_DEBUG)
  89 /**
  90  * Debug printf implementation.
  91  *
  92  * @param fmt  printf style format parameter
  93  */
  94 void dbg_printf(const char *fmt, ...)
  95 {
  96         va_list list;
  97
  98         if (firm_dump.debug_print) {
  99                 va_start(list, fmt);
 100                 vprintf(fmt, list);
 101                 va_end(list);
 102         }  /* if */
 103 }
 104 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 105
 106 static void initialize_firm(void)
 107 {
 108         firm_early_init();
 109
 110         dump_consts_local(1);
 111         dump_keepalive_edges(1);
 112 }
 113
 114 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 115                             const char *newext)
 116 {
 117         size_t last_dot = 0xffffffff;
 118         size_t i = 0;
 119
 120         if(inputname == NULL) {
 121                 snprintf(buf, buflen, "a%s", newext);
 122                 return;
 123         }
 124
 125         for(const char *c = inputname; *c != 0; ++c) {
 126                 if(*c == '.')
 127                         last_dot = i;
 128                 ++i;
 129         }
 130         if(last_dot == 0xffffffff)
 131                 last_dot = i;
 132
 133         if(last_dot >= buflen)
 134                 panic("filename too long");
 135         memcpy(buf, inputname, last_dot);
 136
 137         size_t extlen = strlen(newext) + 1;
 138         if(extlen + last_dot >= buflen)
 139                 panic("filename too long");
 140         memcpy(buf+last_dot, newext, extlen);
 141 }
 142
 143 static translation_unit_t *do_parsing(FILE *const in, const char *const input)
 144 {
 145         lexer_open_stream(in, input);
 146         translation_unit_t *unit = parse();
 147         return unit;
 148 }
 149
 150 static void lextest(FILE *in, const char *fname)
 151 {
 152         lexer_open_stream(in, fname);
 153
 154         do {
 155                 lexer_next_preprocessing_token();
 156                 print_token(stdout, &lexer_token);
 157                 puts("");
 158         } while(lexer_token.type != T_EOF);
 159 }
 160
 161 static FILE* preprocess(FILE* in, const char *fname)
 162 {
 163         char buf[4096];
 164         const char *flags = obstack_finish(&cppflags_obst);
 165
 166         if(in != stdin) {
 167                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 168         } else {
 169                 /* read from stdin */
 170                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 171         }
 172
 173         if(verbose) {
 174                 puts(buf);
 175         }
 176         FILE* f = popen(buf, "r");
 177         if (f == NULL) {
 178                 fprintf(stderr, "invoking preprocessor failed\n");
 179                 exit(1);
 180         }
 181         return f;
 182 }
 183
 184 static void do_link(const char *out, const char *in)
 185 {
 186         char buf[4096];
 187
 188         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 189         if(verbose) {
 190                 puts(buf);
 191         }
 192         int err = system(buf);
 193         if(err != 0) {
 194                 fprintf(stderr, "linker reported an error\n");
 195                 exit(1);
 196         }
 197 }
 198
 199 static void assemble(const char *out, const char *in)
 200 {
 201         char buf[4096];
 202
 203         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 204         if(verbose) {
 205                 puts(buf);
 206         }
 207
 208         int err = system(buf);
 209         if(err != 0) {
 210                 fprintf(stderr, "assembler reported an error\n");
 211                 exit(1);
 212         }
 213 }
 214
 215 static const char *try_dir(const char *dir)
 216 {
 217         if(dir == NULL)
 218                 return dir;
 219         if(access(dir, R_OK | W_OK | X_OK) == 0)
 220                 return dir;
 221         return NULL;
 222 }
 223
 224 static const char *get_tempdir(void)
 225 {
 226         static const char *tmpdir = NULL;
 227
 228         if(tmpdir != NULL)
 229                 return tmpdir;
 230
 231         if(tmpdir == NULL)
 232                 tmpdir = try_dir(getenv("TMPDIR"));
 233         if(tmpdir == NULL)
 234                 tmpdir = try_dir(getenv("TMP"));
 235         if(tmpdir == NULL)
 236                 tmpdir = try_dir(getenv("TEMP"));
 237
 238 #ifdef P_tmpdir
 239         if(tmpdir == NULL)
 240                 tmpdir = try_dir(P_tmpdir);
 241 #endif
 242
 243         if(tmpdir == NULL)
 244                 tmpdir = try_dir("/var/tmp");
 245         if(tmpdir == NULL)
 246                 tmpdir = try_dir("/usr/tmp");
 247         if(tmpdir == NULL)
 248                 tmpdir = try_dir("/tmp");
 249
 250         if(tmpdir == NULL)
 251                 tmpdir = ".";
 252
 253         return tmpdir;
 254 }
 255
 256 #ifndef HAVE_MKSTEMP
 257 /* cheap and nasty mkstemp replacement */
 258 static int mkstemp(char *templ)
 259 {
 260         mktemp(templ);
 261         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 262 }
 263 #endif
 264
 265 /**
 266  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 267  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 268  */
 269 static FILE *make_temp_file(char *buffer, size_t buflen,
 270                             const char *prefix, const char *suffix)
 271 {
 272         const char *tempdir = get_tempdir();
 273
 274         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 275         (void) suffix;
 276         suffix = "";
 277
 278         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 279
 280         int fd = mkstemp(buffer);
 281         if(fd == -1) {
 282                 fprintf(stderr, "couldn't create temporary file: %s\n",
 283                         strerror(errno));
 284                 exit(1);
 285         }
 286         FILE *out = fdopen(fd, "w");
 287         if(out == NULL) {
 288                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 289                 exit(1);
 290         }
 291
 292         return out;
 293 }
 294
 295 /**
 296  * Do the necessary lowering for compound parameters.
 297  */
 298 void lower_compound_params(void)
 299 {
 300         lower_params_t params;
 301
 302         params.def_ptr_alignment    = 4;
 303         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 304         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 305         params.find_pointer_type    = NULL;
 306         params.ret_compound_in_regs = NULL;
 307         lower_calls_with_compounds(&params);
 308 }
 309
 310 typedef enum compile_mode_t {
 311         ParseOnly,
 312         Compile,
 313         CompileDump,
 314         CompileAssemble,
 315         CompileAssembleLink,
 316         LexTest,
 317         PrintAst,
 318         PrintFluffy
 319 } compile_mode_t;
 320
 321 static void usage(const char *argv0)
 322 {
 323         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 324 }
 325
 326 int main(int argc, char **argv)
 327 {
 328         initialize_firm();
 329
 330         const char     *input        = NULL;
 331         const char     *outname      = NULL;
 332         const char     *dumpfunction = NULL;
 333         compile_mode_t  mode         = CompileAssembleLink;
 334
 335         obstack_init(&cppflags_obst);
 336
 337 #define GET_ARG_AFTER(def, args)                                             \
 338         def = &arg[sizeof(args)-1];                                              \
 339         if(def[0] == '\0') {                                                     \
 340                 ++i;                                                                 \
 341                 if(i >= argc) {                                                      \
 342                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 343                         argument_errors = true;                                          \
 344                         break;                                                           \
 345                 }                                                                    \
 346                 def = argv[i];                                                       \
 347                 if(def[0] == '-' && def[1] != '\0') {                                \
 348                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 349                         argument_errors = true;                                          \
 350                         continue;                                                        \
 351                 }                                                                    \
 352         }
 353
 354         bool help_displayed  = false;
 355         bool argument_errors = false;
 356         for(int i = 1; i < argc; ++i) {
 357                 const char *arg = argv[i];
 358                 if(strncmp(arg, "-o", 2) == 0) {
 359                         GET_ARG_AFTER(outname, "-o");
 360                 } else if(strcmp(arg, "-c") == 0) {
 361                         mode = CompileAssemble;
 362                 } else if(strcmp(arg, "-S") == 0) {
 363                         mode = Compile;
 364                 } else if(strcmp(arg, "--gcc") == 0) {
 365                         c_mode |= _GNUC;
 366                 } else if(strcmp(arg, "--no-gcc") == 0) {
 367                         c_mode &= ~_GNUC;
 368                 } else if(strcmp(arg, "--ms") == 0) {
 369                         c_mode |= _MS;
 370                 } else if(strcmp(arg, "--signed-chars") == 0) {
 371                         char_is_signed = true;
 372                 } else if(strcmp(arg, "--unsigned-chars") == 0) {
 373                         char_is_signed = false;
 374                 } else if(strcmp(arg, "--strict") == 0) {
 375                         strict_mode = true;
 376                 } else if(strcmp(arg, "--no-ms") == 0) {
 377                         c_mode &= ~_MS;
 378                 } else if(strcmp(arg, "--lextest") == 0) {
 379                         mode = LexTest;
 380                 } else if(strcmp(arg, "--print-ast") == 0) {
 381                         mode = PrintAst;
 382                 } else if(strcmp(arg, "--print-fluffy") == 0) {
 383                         mode = PrintFluffy;
 384                 } else if(strcmp(arg, "--version") == 0) {
 385                         firm_version_t ver;
 386                         firm_get_version(&ver);
 387                         printf("cparser (%d.%d %s) using libFirm (%u.%u", 0, 1, cparser_REVISION, ver.major, ver.minor);
 388                         if(ver.revision[0] != 0) {
 389                                 putchar(' ');
 390                                 fputs(ver.revision, stdout);
 391                         }
 392                         if(ver.build[0] != 0) {
 393                                 putchar(' ');
 394                                 fputs(ver.build, stdout);
 395                         }
 396                         puts(")\n");
 397                         exit(EXIT_SUCCESS);
 398                 } else if(strcmp(arg, "-fsyntax-only") == 0) {
 399                         mode = ParseOnly;
 400                 } else if(strncmp(arg, "-I", 2) == 0) {
 401                         const char *opt;
 402                         GET_ARG_AFTER(opt, "-I");
 403                         obstack_printf(&cppflags_obst, " -I%s", opt);
 404                 } else if(strncmp(arg, "-D", 2) == 0) {
 405                         const char *opt;
 406                         GET_ARG_AFTER(opt, "-D");
 407                         obstack_printf(&cppflags_obst, " -D%s", opt);
 408                 } else if(strncmp(arg, "-U", 2) == 0) {
 409                         const char *opt;
 410                         GET_ARG_AFTER(opt, "-U");
 411                         obstack_printf(&cppflags_obst, " -U%s", opt);
 412                 } else if(strcmp(arg, "--dump-function") == 0) {
 413                         ++i;
 414                         if(i >= argc) {
 415                                 fprintf(stderr, "error: "
 416                                         "expected argument after '--dump-function'\n");
 417                                 argument_errors = true;
 418                                 break;
 419                         }
 420                         dumpfunction = argv[i];
 421                         mode         = CompileDump;
 422                 } else if(strcmp(arg, "-v") == 0) {
 423                         verbose = 1;
 424                 } else if(arg[0] == '-' && arg[1] == 'f') {
 425                         const char *opt;
 426                         GET_ARG_AFTER(opt, "-f");
 427
 428                         if(strcmp(opt, "omit-frame-pointer") == 0) {
 429                                 firm_be_option("omitfp");
 430                         } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 431                                 firm_be_option("omitfp=no");
 432                         } else {
 433                                 int res = firm_option(opt);
 434                                 if (res == 0) {
 435                                         fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 436                                                 opt);
 437                                         argument_errors = true;
 438                                         continue;
 439                                 } else if (res == -1) {
 440                                         help_displayed = true;
 441                                 }
 442                         }
 443                 } else if(arg[0] == '-' && arg[1] == 'b') {
 444                         const char *opt;
 445                         GET_ARG_AFTER(opt, "-b");
 446                         int res = firm_be_option(opt);
 447                         if (res == 0) {
 448                                 fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 449                                         opt);
 450                                 argument_errors = true;
 451                         } else if (res == -1) {
 452                                 help_displayed = true;
 453                         }
 454                 } else if(arg[0] == '-' && arg[1] == 'W') {
 455                         const char *opt;
 456                         GET_ARG_AFTER(opt, "-W");
 457                         if (strcmp(opt, "error") == 0) {
 458                                 warnings_are_errors = true;
 459                         } else {
 460                                 fprintf(stderr, "warning: ignoring gcc option -W%s\n", opt);
 461                         }
 462                 } else if(arg[0] == '-' && arg[1] == 'm') {
 463                         const char *opt;
 464                         GET_ARG_AFTER(opt, "-m");
 465                         char *endptr;
 466                         long int value = strtol(opt, &endptr, 10);
 467                         if (*endptr != '\0') {
 468                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 469                                 argument_errors = true;
 470                         }
 471                         if (value != 16 && value != 32 && value != 64) {
 472                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 473                                 argument_errors = true;
 474                         } else {
 475                                 machine_size = (unsigned int)value;
 476                         }
 477                 } else if(arg[0] == '-') {
 478                         if (arg[1] == '\0') {
 479                                 if(input != NULL) {
 480                                         fprintf(stderr, "error: multiple input files specified\n");
 481                                         argument_errors = true;
 482                                 } else {
 483                                         input = arg;
 484                                 }
 485                         } else if(strcmp(arg, "-pedantic") == 0) {
 486                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 487                         } else if(arg[1] == 'O' ||
 488                                         arg[1] == 'g' ||
 489                                         strncmp(arg + 1, "std=", 4) == 0) {
 490                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 491                         } else {
 492                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 493                                 argument_errors = true;
 494                         }
 495                 } else {
 496                         if(input != NULL) {
 497                                 fprintf(stderr, "error: multiple input files specified\n");
 498                                 argument_errors = true;
 499                         } else {
 500                                 input = arg;
 501                         }
 502                 }
 503         }
 504
 505         /* we do the lowering in ast2firm */
 506         firm_opt.lower_bitfields = FALSE;
 507
 508         if(help_displayed) {
 509                 return !argument_errors;
 510         }
 511         if(argument_errors) {
 512                 usage(argv[0]);
 513                 return 1;
 514         }
 515
 516         gen_firm_init();
 517         init_symbol_table();
 518         init_tokens();
 519         init_types();
 520         init_typehash();
 521         init_basic_types();
 522         init_lexer();
 523         init_ast();
 524         init_parser();
 525         init_ast2firm();
 526
 527         FILE *out = NULL;
 528         char  outnamebuf[4096];
 529         if(outname == NULL) {
 530                 switch(mode) {
 531                 case PrintAst:
 532                 case PrintFluffy:
 533                 case LexTest:
 534                         if(outname == NULL)
 535                                 outname = "-";
 536                         break;
 537                 case ParseOnly:
 538                         break;
 539                 case Compile:
 540                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 541                         outname = outnamebuf;
 542                         break;
 543                 case CompileAssemble:
 544                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 545                         outname = outnamebuf;
 546                         break;
 547                 case CompileDump:
 548                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 549                                         ".vcg");
 550                         outname = outnamebuf;
 551                         break;
 552                 case CompileAssembleLink:
 553                         outname = "a.out";
 554                         break;
 555                 }
 556         }
 557
 558         if(outname != NULL) {
 559                 if(strcmp(outname, "-") == 0) {
 560                         out = stdout;
 561                 } else {
 562                         out = fopen(outname, "w");
 563                         if(out == NULL) {
 564                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 565                                         strerror(errno));
 566                                 return 1;
 567                         }
 568                 }
 569         }
 570
 571         FILE *in;
 572         if(input == NULL) {
 573                 fprintf(stderr, "%s: no input files\n", argv[0]);
 574                 return 1;
 575         } else if(strcmp(input, "-") == 0) {
 576                 in    = stdin;
 577                 input = "<stdin>";
 578         } else {
 579                 in = fopen(input, "r");
 580                 if(in == NULL) {
 581                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 582                         return 1;
 583                 }
 584         }
 585
 586         if(mode == LexTest) {
 587                 lextest(in, input);
 588                 fclose(in);
 589                 return 0;
 590         }
 591
 592         FILE *preprocessed_in = preprocess(in, input);
 593         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 594         pclose(preprocessed_in);
 595         if(unit == NULL) {
 596                 /* parsing failed because of errors */
 597                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 598                 return EXIT_FAILURE;
 599         }
 600         if (warning_count > 0) {
 601                 fprintf(stderr, "%u warning(s)\n", warning_count);
 602         }
 603
 604         if(mode == PrintAst) {
 605                 type_set_output(out);
 606                 ast_set_output(out);
 607                 print_ast(unit);
 608                 return 0;
 609         }
 610         if(mode == PrintFluffy) {
 611                 type_set_output(out);
 612                 ast_set_output(out);
 613                 write_fluffy_decls(out, unit);
 614         }
 615
 616         translation_unit_to_firm(unit);
 617
 618         if(mode == ParseOnly) {
 619                 return 0;
 620         }
 621
 622         FILE *asm_out;
 623         char  asm_tempfile[1024];
 624         if(mode == CompileDump) {
 625                 asm_out = NULL;
 626                 firm_be_opt.selection = BE_NONE;
 627         } else if(mode == Compile) {
 628                 asm_out = out;
 629         } else {
 630                 asm_out
 631                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 632         }
 633         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 634
 635         if(mode == CompileDump) {
 636                 /* find irg */
 637                 ident    *id     = new_id_from_str(dumpfunction);
 638                 ir_graph *irg    = NULL;
 639                 int       n_irgs = get_irp_n_irgs();
 640                 for(int i = 0; i < n_irgs; ++i) {
 641                         ir_graph *tirg   = get_irp_irg(i);
 642                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 643                         if(irg_id == id) {
 644                                 irg = tirg;
 645                                 break;
 646                         }
 647                 }
 648
 649                 if(irg == NULL) {
 650                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 651                         return 1;
 652                 }
 653
 654                 dump_ir_block_graph_file(irg, out);
 655                 fclose(out);
 656                 return 0;
 657         }
 658
 659         fclose(asm_out);
 660
 661         /* assemble assembler and create object file */
 662         char obj_tfile[1024];
 663         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 664                 const char *obj_outfile;
 665                 if(mode == CompileAssemble) {
 666                         fclose(out);
 667                         obj_outfile = outname;
 668                 } else {
 669                         FILE *tempf
 670                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 671                         fclose(tempf);
 672                         obj_outfile = obj_tfile;
 673                 }
 674
 675                 assemble(obj_outfile, asm_tempfile);
 676         }
 677
 678         /* link object file */
 679         if(mode == CompileAssembleLink) {
 680                 do_link(outname, obj_tfile);
 681         }
 682
 683         obstack_free(&cppflags_obst, NULL);
 684
 685         exit_ast2firm();
 686         exit_parser();
 687         exit_ast();
 688         exit_lexer();
 689         exit_typehash();
 690         exit_types();
 691         exit_tokens();
 692         exit_symbol_table();
 693         return 0;
 694 }