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 #include "warning.h"
  61
  62 #ifndef PREPROCESSOR
  63 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
  64 #endif
  65
  66 #ifndef LINKER
  67 #define LINKER    "gcc -m32"
  68 #endif
  69
  70 #ifndef ASSEMBLER
  71 #define ASSEMBLER "as --32"
  72 #endif
  73
  74 /** The current c mode/dialect. */
  75 unsigned int c_mode = _C89|_C99|_GNUC;
  76
  77 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
  78 unsigned int machine_size = 32;
  79
  80 /** true if the char type is signed. */
  81 bool char_is_signed = true;
  82
  83 /** true for strict language checking. */
  84 bool strict_mode = false;
  85
  86 static int            verbose;
  87 static struct obstack cppflags_obst;
  88
  89 #if defined(_DEBUG) || defined(FIRM_DEBUG)
  90 /**
  91  * Debug printf implementation.
  92  *
  93  * @param fmt  printf style format parameter
  94  */
  95 void dbg_printf(const char *fmt, ...)
  96 {
  97         va_list list;
  98
  99         if (firm_dump.debug_print) {
 100                 va_start(list, fmt);
 101                 vprintf(fmt, list);
 102                 va_end(list);
 103         }  /* if */
 104 }
 105 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 106
 107 static void initialize_firm(void)
 108 {
 109         firm_early_init();
 110
 111         dump_consts_local(1);
 112         dump_keepalive_edges(1);
 113 }
 114
 115 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 116                             const char *newext)
 117 {
 118         size_t last_dot = 0xffffffff;
 119         size_t i = 0;
 120
 121         if(inputname == NULL) {
 122                 snprintf(buf, buflen, "a%s", newext);
 123                 return;
 124         }
 125
 126         for(const char *c = inputname; *c != 0; ++c) {
 127                 if(*c == '.')
 128                         last_dot = i;
 129                 ++i;
 130         }
 131         if(last_dot == 0xffffffff)
 132                 last_dot = i;
 133
 134         if(last_dot >= buflen)
 135                 panic("filename too long");
 136         memcpy(buf, inputname, last_dot);
 137
 138         size_t extlen = strlen(newext) + 1;
 139         if(extlen + last_dot >= buflen)
 140                 panic("filename too long");
 141         memcpy(buf+last_dot, newext, extlen);
 142 }
 143
 144 static translation_unit_t *do_parsing(FILE *const in, const char *const input)
 145 {
 146         lexer_open_stream(in, input);
 147         translation_unit_t *unit = parse();
 148         return unit;
 149 }
 150
 151 static void lextest(FILE *in, const char *fname)
 152 {
 153         lexer_open_stream(in, fname);
 154
 155         do {
 156                 lexer_next_preprocessing_token();
 157                 print_token(stdout, &lexer_token);
 158                 puts("");
 159         } while(lexer_token.type != T_EOF);
 160 }
 161
 162 static FILE* preprocess(FILE* in, const char *fname)
 163 {
 164         char buf[4096];
 165         const char *flags = obstack_finish(&cppflags_obst);
 166
 167         if(in != stdin) {
 168                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 169         } else {
 170                 /* read from stdin */
 171                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 172         }
 173
 174         if(verbose) {
 175                 puts(buf);
 176         }
 177         FILE* f = popen(buf, "r");
 178         if (f == NULL) {
 179                 fprintf(stderr, "invoking preprocessor failed\n");
 180                 exit(1);
 181         }
 182         return f;
 183 }
 184
 185 static void do_link(const char *out, const char *in)
 186 {
 187         char buf[4096];
 188
 189         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 190         if(verbose) {
 191                 puts(buf);
 192         }
 193         int err = system(buf);
 194         if(err != 0) {
 195                 fprintf(stderr, "linker reported an error\n");
 196                 exit(1);
 197         }
 198 }
 199
 200 static void assemble(const char *out, const char *in)
 201 {
 202         char buf[4096];
 203
 204         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 205         if(verbose) {
 206                 puts(buf);
 207         }
 208
 209         int err = system(buf);
 210         if(err != 0) {
 211                 fprintf(stderr, "assembler reported an error\n");
 212                 exit(1);
 213         }
 214 }
 215
 216 static const char *try_dir(const char *dir)
 217 {
 218         if(dir == NULL)
 219                 return dir;
 220         if(access(dir, R_OK | W_OK | X_OK) == 0)
 221                 return dir;
 222         return NULL;
 223 }
 224
 225 static const char *get_tempdir(void)
 226 {
 227         static const char *tmpdir = NULL;
 228
 229         if(tmpdir != NULL)
 230                 return tmpdir;
 231
 232         if(tmpdir == NULL)
 233                 tmpdir = try_dir(getenv("TMPDIR"));
 234         if(tmpdir == NULL)
 235                 tmpdir = try_dir(getenv("TMP"));
 236         if(tmpdir == NULL)
 237                 tmpdir = try_dir(getenv("TEMP"));
 238
 239 #ifdef P_tmpdir
 240         if(tmpdir == NULL)
 241                 tmpdir = try_dir(P_tmpdir);
 242 #endif
 243
 244         if(tmpdir == NULL)
 245                 tmpdir = try_dir("/var/tmp");
 246         if(tmpdir == NULL)
 247                 tmpdir = try_dir("/usr/tmp");
 248         if(tmpdir == NULL)
 249                 tmpdir = try_dir("/tmp");
 250
 251         if(tmpdir == NULL)
 252                 tmpdir = ".";
 253
 254         return tmpdir;
 255 }
 256
 257 #ifndef HAVE_MKSTEMP
 258 /* cheap and nasty mkstemp replacement */
 259 static int mkstemp(char *templ)
 260 {
 261         mktemp(templ);
 262         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 263 }
 264 #endif
 265
 266 /**
 267  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 268  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 269  */
 270 static FILE *make_temp_file(char *buffer, size_t buflen,
 271                             const char *prefix, const char *suffix)
 272 {
 273         const char *tempdir = get_tempdir();
 274
 275         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 276         (void) suffix;
 277         suffix = "";
 278
 279         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 280
 281         int fd = mkstemp(buffer);
 282         if(fd == -1) {
 283                 fprintf(stderr, "couldn't create temporary file: %s\n",
 284                         strerror(errno));
 285                 exit(1);
 286         }
 287         FILE *out = fdopen(fd, "w");
 288         if(out == NULL) {
 289                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 290                 exit(1);
 291         }
 292
 293         return out;
 294 }
 295
 296 /**
 297  * Do the necessary lowering for compound parameters.
 298  */
 299 void lower_compound_params(void)
 300 {
 301         lower_params_t params;
 302
 303         params.def_ptr_alignment    = 4;
 304         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 305         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 306         params.find_pointer_type    = NULL;
 307         params.ret_compound_in_regs = NULL;
 308         lower_calls_with_compounds(&params);
 309 }
 310
 311 typedef enum compile_mode_t {
 312         ParseOnly,
 313         Compile,
 314         CompileDump,
 315         CompileAssemble,
 316         CompileAssembleLink,
 317         LexTest,
 318         PrintAst,
 319         PrintFluffy
 320 } compile_mode_t;
 321
 322 static void usage(const char *argv0)
 323 {
 324         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 325 }
 326
 327 int main(int argc, char **argv)
 328 {
 329         initialize_firm();
 330
 331         const char     *input        = NULL;
 332         const char     *outname      = NULL;
 333         const char     *dumpfunction = NULL;
 334         compile_mode_t  mode         = CompileAssembleLink;
 335
 336         obstack_init(&cppflags_obst);
 337
 338 #define GET_ARG_AFTER(def, args)                                             \
 339         def = &arg[sizeof(args)-1];                                              \
 340         if(def[0] == '\0') {                                                     \
 341                 ++i;                                                                 \
 342                 if(i >= argc) {                                                      \
 343                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 344                         argument_errors = true;                                          \
 345                         break;                                                           \
 346                 }                                                                    \
 347                 def = argv[i];                                                       \
 348                 if(def[0] == '-' && def[1] != '\0') {                                \
 349                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 350                         argument_errors = true;                                          \
 351                         continue;                                                        \
 352                 }                                                                    \
 353         }
 354
 355         bool help_displayed  = false;
 356         bool argument_errors = false;
 357         for(int i = 1; i < argc; ++i) {
 358                 const char *arg = argv[i];
 359                 if(strncmp(arg, "-o", 2) == 0) {
 360                         GET_ARG_AFTER(outname, "-o");
 361                 } else if(strcmp(arg, "-c") == 0) {
 362                         mode = CompileAssemble;
 363                 } else if(strcmp(arg, "-S") == 0) {
 364                         mode = Compile;
 365                 } else if(strcmp(arg, "--gcc") == 0) {
 366                         c_mode |= _GNUC;
 367                 } else if(strcmp(arg, "--no-gcc") == 0) {
 368                         c_mode &= ~_GNUC;
 369                 } else if(strcmp(arg, "--ms") == 0) {
 370                         c_mode |= _MS;
 371                 } else if(strcmp(arg, "--signed-chars") == 0) {
 372                         char_is_signed = true;
 373                 } else if(strcmp(arg, "--unsigned-chars") == 0) {
 374                         char_is_signed = false;
 375                 } else if(strcmp(arg, "--strict") == 0) {
 376                         strict_mode = true;
 377                 } else if(strcmp(arg, "--no-ms") == 0) {
 378                         c_mode &= ~_MS;
 379                 } else if(strcmp(arg, "--lextest") == 0) {
 380                         mode = LexTest;
 381                 } else if(strcmp(arg, "--print-ast") == 0) {
 382                         mode = PrintAst;
 383                 } else if(strcmp(arg, "--print-fluffy") == 0) {
 384                         mode = PrintFluffy;
 385                 } else if(strcmp(arg, "--version") == 0) {
 386                         firm_version_t ver;
 387                         firm_get_version(&ver);
 388                         printf("cparser (%d.%d %s) using libFirm (%u.%u", 0, 1, cparser_REVISION, ver.major, ver.minor);
 389                         if(ver.revision[0] != 0) {
 390                                 putchar(' ');
 391                                 fputs(ver.revision, stdout);
 392                         }
 393                         if(ver.build[0] != 0) {
 394                                 putchar(' ');
 395                                 fputs(ver.build, stdout);
 396                         }
 397                         puts(")\n");
 398                         exit(EXIT_SUCCESS);
 399                 } else if(strcmp(arg, "-fsyntax-only") == 0) {
 400                         mode = ParseOnly;
 401                 } else if(strncmp(arg, "-I", 2) == 0) {
 402                         const char *opt;
 403                         GET_ARG_AFTER(opt, "-I");
 404                         obstack_printf(&cppflags_obst, " -I%s", opt);
 405                 } else if(strncmp(arg, "-D", 2) == 0) {
 406                         const char *opt;
 407                         GET_ARG_AFTER(opt, "-D");
 408                         obstack_printf(&cppflags_obst, " -D%s", opt);
 409                 } else if(strncmp(arg, "-U", 2) == 0) {
 410                         const char *opt;
 411                         GET_ARG_AFTER(opt, "-U");
 412                         obstack_printf(&cppflags_obst, " -U%s", opt);
 413                 } else if(strcmp(arg, "--dump-function") == 0) {
 414                         ++i;
 415                         if(i >= argc) {
 416                                 fprintf(stderr, "error: "
 417                                         "expected argument after '--dump-function'\n");
 418                                 argument_errors = true;
 419                                 break;
 420                         }
 421                         dumpfunction = argv[i];
 422                         mode         = CompileDump;
 423                 } else if(strcmp(arg, "-v") == 0) {
 424                         verbose = 1;
 425                 } else if(strcmp(arg, "-w") == 0) {
 426                         inhibit_all_warnings = true;
 427                 } else if(arg[0] == '-' && arg[1] == 'f') {
 428                         const char *opt;
 429                         GET_ARG_AFTER(opt, "-f");
 430
 431                         if(strcmp(opt, "omit-frame-pointer") == 0) {
 432                                 firm_be_option("omitfp");
 433                         } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
 434                                 firm_be_option("omitfp=no");
 435                         } else {
 436                                 int res = firm_option(opt);
 437                                 if (res == 0) {
 438                                         fprintf(stderr, "error: unknown Firm option '-f %s'\n",
 439                                                 opt);
 440                                         argument_errors = true;
 441                                         continue;
 442                                 } else if (res == -1) {
 443                                         help_displayed = true;
 444                                 }
 445                         }
 446                 } else if(arg[0] == '-' && arg[1] == 'b') {
 447                         const char *opt;
 448                         GET_ARG_AFTER(opt, "-b");
 449                         int res = firm_be_option(opt);
 450                         if (res == 0) {
 451                                 fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 452                                         opt);
 453                                 argument_errors = true;
 454                         } else if (res == -1) {
 455                                 help_displayed = true;
 456                         }
 457                 } else if(arg[0] == '-' && arg[1] == 'W') {
 458                         const char *opt;
 459                         GET_ARG_AFTER(opt, "-W");
 460                         set_warning_opt(opt);
 461                 } else if(arg[0] == '-' && arg[1] == 'm') {
 462                         const char *opt;
 463                         GET_ARG_AFTER(opt, "-m");
 464                         char *endptr;
 465                         long int value = strtol(opt, &endptr, 10);
 466                         if (*endptr != '\0') {
 467                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 468                                 argument_errors = true;
 469                         }
 470                         if (value != 16 && value != 32 && value != 64) {
 471                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 472                                 argument_errors = true;
 473                         } else {
 474                                 machine_size = (unsigned int)value;
 475                         }
 476                 } else if(arg[0] == '-') {
 477                         if (arg[1] == '\0') {
 478                                 if(input != NULL) {
 479                                         fprintf(stderr, "error: multiple input files specified\n");
 480                                         argument_errors = true;
 481                                 } else {
 482                                         input = arg;
 483                                 }
 484                         } else if(strcmp(arg, "-pedantic") == 0) {
 485                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 486                         } else if(arg[1] == 'O' ||
 487                                         arg[1] == 'g' ||
 488                                         strncmp(arg + 1, "std=", 4) == 0) {
 489                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 490                         } else {
 491                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 492                                 argument_errors = true;
 493                         }
 494                 } else {
 495                         if(input != NULL) {
 496                                 fprintf(stderr, "error: multiple input files specified\n");
 497                                 argument_errors = true;
 498                         } else {
 499                                 input = arg;
 500                         }
 501                 }
 502         }
 503
 504         /* we do the lowering in ast2firm */
 505         firm_opt.lower_bitfields = FALSE;
 506
 507         if(help_displayed) {
 508                 return !argument_errors;
 509         }
 510         if(argument_errors) {
 511                 usage(argv[0]);
 512                 return 1;
 513         }
 514
 515         gen_firm_init();
 516         init_symbol_table();
 517         init_tokens();
 518         init_types();
 519         init_typehash();
 520         init_basic_types();
 521         init_lexer();
 522         init_ast();
 523         init_parser();
 524         init_ast2firm();
 525
 526         FILE *out = NULL;
 527         char  outnamebuf[4096];
 528         if(outname == NULL) {
 529                 switch(mode) {
 530                 case PrintAst:
 531                 case PrintFluffy:
 532                 case LexTest:
 533                         if(outname == NULL)
 534                                 outname = "-";
 535                         break;
 536                 case ParseOnly:
 537                         break;
 538                 case Compile:
 539                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 540                         outname = outnamebuf;
 541                         break;
 542                 case CompileAssemble:
 543                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 544                         outname = outnamebuf;
 545                         break;
 546                 case CompileDump:
 547                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 548                                         ".vcg");
 549                         outname = outnamebuf;
 550                         break;
 551                 case CompileAssembleLink:
 552                         outname = "a.out";
 553                         break;
 554                 }
 555         }
 556
 557         if(outname != NULL) {
 558                 if(strcmp(outname, "-") == 0) {
 559                         out = stdout;
 560                 } else {
 561                         out = fopen(outname, "w");
 562                         if(out == NULL) {
 563                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 564                                         strerror(errno));
 565                                 return 1;
 566                         }
 567                 }
 568         }
 569
 570         FILE *in;
 571         if(input == NULL) {
 572                 fprintf(stderr, "%s: no input files\n", argv[0]);
 573                 return 1;
 574         } else if(strcmp(input, "-") == 0) {
 575                 in    = stdin;
 576                 input = "<stdin>";
 577         } else {
 578                 in = fopen(input, "r");
 579                 if(in == NULL) {
 580                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 581                         return 1;
 582                 }
 583         }
 584
 585         if(mode == LexTest) {
 586                 lextest(in, input);
 587                 fclose(in);
 588                 return 0;
 589         }
 590
 591         FILE *preprocessed_in = preprocess(in, input);
 592         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 593         int result = pclose(preprocessed_in);
 594         if(result != 0) {
 595                 return result;
 596         }
 597         if(unit == NULL) {
 598                 /* parsing failed because of errors */
 599                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
 600                 return EXIT_FAILURE;
 601         }
 602         if (warning_count > 0) {
 603                 fprintf(stderr, "%u warning(s)\n", warning_count);
 604         }
 605
 606         if(mode == PrintAst) {
 607                 type_set_output(out);
 608                 ast_set_output(out);
 609                 print_ast(unit);
 610                 return 0;
 611         }
 612         if(mode == PrintFluffy) {
 613                 type_set_output(out);
 614                 ast_set_output(out);
 615                 write_fluffy_decls(out, unit);
 616         }
 617
 618         translation_unit_to_firm(unit);
 619
 620         if(mode == ParseOnly) {
 621                 return 0;
 622         }
 623
 624         FILE *asm_out;
 625         char  asm_tempfile[1024];
 626         if(mode == CompileDump) {
 627                 asm_out = NULL;
 628                 firm_be_opt.selection = BE_NONE;
 629         } else if(mode == Compile) {
 630                 asm_out = out;
 631         } else {
 632                 asm_out
 633                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 634         }
 635         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 636
 637         if(mode == CompileDump) {
 638                 /* find irg */
 639                 ident    *id     = new_id_from_str(dumpfunction);
 640                 ir_graph *irg    = NULL;
 641                 int       n_irgs = get_irp_n_irgs();
 642                 for(int i = 0; i < n_irgs; ++i) {
 643                         ir_graph *tirg   = get_irp_irg(i);
 644                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 645                         if(irg_id == id) {
 646                                 irg = tirg;
 647                                 break;
 648                         }
 649                 }
 650
 651                 if(irg == NULL) {
 652                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 653                         return 1;
 654                 }
 655
 656                 dump_ir_block_graph_file(irg, out);
 657                 fclose(out);
 658                 return 0;
 659         }
 660
 661         fclose(asm_out);
 662
 663         /* assemble assembler and create object file */
 664         char obj_tfile[1024];
 665         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 666                 const char *obj_outfile;
 667                 if(mode == CompileAssemble) {
 668                         fclose(out);
 669                         obj_outfile = outname;
 670                 } else {
 671                         FILE *tempf
 672                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 673                         fclose(tempf);
 674                         obj_outfile = obj_tfile;
 675                 }
 676
 677                 assemble(obj_outfile, asm_tempfile);
 678         }
 679
 680         /* link object file */
 681         if(mode == CompileAssembleLink) {
 682                 do_link(outname, obj_tfile);
 683         }
 684
 685         obstack_free(&cppflags_obst, NULL);
 686
 687         exit_ast2firm();
 688         exit_parser();
 689         exit_ast();
 690         exit_lexer();
 691         exit_typehash();
 692         exit_types();
 693         exit_tokens();
 694         exit_symbol_table();
 695         return 0;
 696 }