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