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 <unistd.h>
  11 #include <assert.h>
  12
  13 #ifndef WITH_LIBCORE
  14 #define WITH_LIBCORE
  15 #endif
  16
  17 #include <libfirm/firm.h>
  18 #include <libfirm/be.h>
  19
  20 #include "lexer.h"
  21 #include "token_t.h"
  22 #include "type_hash.h"
  23 #include "parser.h"
  24 #include "ast2firm.h"
  25 #include "driver/firm_cmdline.h"
  26 #include "adt/error.h"
  27 #include "write_fluffy.h"
  28 #include "driver/firm_opt.h"
  29
  30 #ifndef PREPROCESSOR
  31 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
  32 #endif
  33
  34 #ifndef LINKER
  35 #define LINKER       "gcc"
  36 #endif
  37
  38 #ifndef ASSEMBLER
  39 #define ASSEMBLER "as"
  40 #endif
  41
  42 #ifdef _WIN32
  43 /* remap some names */
  44 #define popen(cmd, mode)  _popen(cmd, mode)
  45 #define pclose(file)      _pclose(file)
  46 #endif /* _WIN32 */
  47
  48 static int            verbose;
  49 static bool           do_dump;
  50 static struct obstack cppflags_obst;
  51
  52 static void initialize_firm(void)
  53 {
  54         firm_early_init();
  55
  56         dump_consts_local(1);
  57         dump_keepalive_edges(1);
  58 }
  59
  60 static void dump(ir_graph *irg, const char *suffix)
  61 {
  62         if(do_dump) {
  63                 dump_ir_block_graph(irg, suffix);
  64         }
  65 }
  66
  67 static void get_output_name(char *buf, size_t buflen, const char *inputname,
  68                             const char *newext)
  69 {
  70         size_t last_dot = 0xffffffff;
  71         size_t i = 0;
  72
  73         if(inputname == NULL) {
  74                 snprintf(buf, buflen, "a%s", newext);
  75                 return;
  76         }
  77
  78         for(const char *c = inputname; *c != 0; ++c) {
  79                 if(*c == '.')
  80                         last_dot = i;
  81                 ++i;
  82         }
  83         if(last_dot == 0xffffffff)
  84                 last_dot = i;
  85
  86         if(last_dot >= buflen)
  87                 panic("filename too long");
  88         memcpy(buf, inputname, last_dot);
  89
  90         size_t extlen = strlen(newext) + 1;
  91         if(extlen + last_dot >= buflen)
  92                 panic("filename too long");
  93         memcpy(buf+last_dot, newext, extlen);
  94 }
  95
  96 static translation_unit_t *do_parsing(FILE *const in, const char *const input)
  97 {
  98         lexer_open_stream(in, input);
  99         translation_unit_t *unit = parse();
 100         return unit;
 101 }
 102
 103 static void lextest(FILE *in, const char *fname)
 104 {
 105         lexer_open_stream(in, fname);
 106
 107         do {
 108                 lexer_next_preprocessing_token();
 109                 print_token(stdout, &lexer_token);
 110                 puts("");
 111         } while(lexer_token.type != T_EOF);
 112 }
 113
 114 static FILE* preprocess(FILE* in, const char *fname)
 115 {
 116         char buf[4096];
 117         const char *flags = obstack_finish(&cppflags_obst);
 118
 119         if(in != stdin) {
 120                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
 121         } else {
 122                 /* read from stdin */
 123                 snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
 124         }
 125
 126         if(verbose) {
 127                 puts(buf);
 128         }
 129         FILE* f = popen(buf, "r");
 130         if (f == NULL) {
 131                 fprintf(stderr, "invoking preprocessor failed\n");
 132                 exit(1);
 133         }
 134         return f;
 135 }
 136
 137 static void do_link(const char *out, const char *in)
 138 {
 139         char buf[4096];
 140
 141         snprintf(buf, sizeof(buf), "%s %s -o %s", LINKER, in, out);
 142         if(verbose) {
 143                 puts(buf);
 144         }
 145         int err = system(buf);
 146         if(err != 0) {
 147                 fprintf(stderr, "linker reported an error\n");
 148                 exit(1);
 149         }
 150 }
 151
 152 static void assemble(const char *out, const char *in)
 153 {
 154         char buf[4096];
 155
 156         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 157         if(verbose) {
 158                 puts(buf);
 159         }
 160
 161         int err = system(buf);
 162         if(err != 0) {
 163                 fprintf(stderr, "assembler reported an error\n");
 164                 exit(1);
 165         }
 166 }
 167
 168 static const char *try_dir(const char *dir)
 169 {
 170         if(dir == NULL)
 171                 return dir;
 172         if(access(dir, R_OK | W_OK | X_OK) == 0)
 173                 return dir;
 174         return NULL;
 175 }
 176
 177 static const char *get_tempdir(void)
 178 {
 179         static const char *tmpdir = NULL;
 180
 181         if(tmpdir != NULL)
 182                 return tmpdir;
 183
 184         if(tmpdir == NULL)
 185                 tmpdir = try_dir(getenv("TMPDIR"));
 186         if(tmpdir == NULL)
 187                 tmpdir = try_dir(getenv("TMP"));
 188         if(tmpdir == NULL)
 189                 tmpdir = try_dir(getenv("TEMP"));
 190
 191 #ifdef P_tmpdir
 192         if(tmpdir == NULL)
 193                 tmpdir = try_dir(P_tmpdir);
 194 #endif
 195
 196         if(tmpdir == NULL)
 197                 tmpdir = try_dir("/var/tmp");
 198         if(tmpdir == NULL)
 199                 tmpdir = try_dir("/usr/tmp");
 200         if(tmpdir == NULL)
 201                 tmpdir = try_dir("/tmp");
 202
 203         if(tmpdir == NULL)
 204                 tmpdir = ".";
 205
 206         return tmpdir;
 207 }
 208
 209 /**
 210  * an own version of tmpnam, which: writes in a buffer, appends a user specified
 211  * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
 212  */
 213 static FILE *make_temp_file(char *buffer, size_t buflen,
 214                             const char *prefix, const char *suffix)
 215 {
 216         const char *tempdir = get_tempdir();
 217
 218         /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
 219         (void) suffix;
 220         suffix = "";
 221
 222         snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
 223
 224         int fd = mkstemp(buffer);
 225         if(fd == -1) {
 226                 fprintf(stderr, "couldn't create temporary file: %s\n",
 227                         strerror(errno));
 228                 exit(1);
 229         }
 230         FILE *out = fdopen(fd, "w");
 231         if(out == NULL) {
 232                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 233                 exit(1);
 234         }
 235
 236         return out;
 237 }
 238
 239 /**
 240  * Do the necessary lowering for compound parameters.
 241  */
 242 void lower_compound_params(void)
 243 {
 244         lower_params_t params;
 245
 246         params.def_ptr_alignment    = 4;
 247         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 248         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 249         params.find_pointer_type    = NULL;
 250         params.ret_compound_in_regs = NULL;
 251         lower_calls_with_compounds(&params);
 252 }
 253
 254 static void create_firm_prog(translation_unit_t *unit)
 255 {
 256         translation_unit_to_firm(unit);
 257
 258         int n_irgs = get_irp_n_irgs();
 259         for(int i = 0; i < n_irgs; ++i) {
 260                 ir_graph *const irg = get_irp_irg(i);
 261                 dump(irg, "-start");
 262         }
 263
 264         lower_compound_params();
 265         lower_highlevel();
 266
 267         for(int i = 0; i < n_irgs; ++i) {
 268                 ir_graph *const irg = get_irp_irg(i);
 269                 dump(irg, "-lower");
 270         }
 271 }
 272
 273 typedef enum compile_mode_t {
 274         ParseOnly,
 275         Compile,
 276         CompileDump,
 277         CompileAssemble,
 278         CompileAssembleLink,
 279         LexTest,
 280         PrintAst,
 281         PrintFluffy
 282 } compile_mode_t;
 283
 284 static void usage(const char *argv0)
 285 {
 286         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 287 }
 288
 289 int main(int argc, char **argv)
 290 {
 291         initialize_firm();
 292
 293         init_symbol_table();
 294         init_tokens();
 295         init_types();
 296         init_typehash();
 297         init_lexer();
 298         init_ast();
 299         init_parser();
 300         init_ast2firm();
 301
 302         const char     *input        = NULL;
 303         const char     *outname      = NULL;
 304         const char     *dumpfunction = NULL;
 305         compile_mode_t  mode         = CompileAssembleLink;
 306
 307         obstack_init(&cppflags_obst);
 308
 309 #define GET_ARG_AFTER(def, args)                                             \
 310         def = &arg[sizeof(args)-1];                                              \
 311         if(def[0] == '\0') {                                                     \
 312                 ++i;                                                                 \
 313                 if(i >= argc) {                                                      \
 314                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 315                         argument_errors = true;                                          \
 316                         break;                                                           \
 317                 }                                                                    \
 318                 def = argv[i];                                                       \
 319                 if(def[0] == '-' && def[1] != '\0') {                                \
 320                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 321                         argument_errors = true;                                          \
 322                         continue;                                                        \
 323                 }                                                                    \
 324         }
 325
 326         bool help_displayed  = false;
 327         bool argument_errors = false;
 328         for(int i = 1; i < argc; ++i) {
 329                 const char *arg = argv[i];
 330                 if(strncmp(arg, "-o", 2) == 0) {
 331                         GET_ARG_AFTER(outname, "-o");
 332                 } else if(strcmp(arg, "-c") == 0) {
 333                         mode = CompileAssemble;
 334                 } else if(strcmp(arg, "-S") == 0) {
 335                         mode = Compile;
 336                 } else if(strcmp(arg, "--lextest") == 0) {
 337                         mode = LexTest;
 338                 } else if(strcmp(arg, "--print-ast") == 0) {
 339                         mode = PrintAst;
 340                 } else if(strcmp(arg, "--print-fluffy") == 0) {
 341                         mode = PrintFluffy;
 342                 } else if(strcmp(arg, "-fsyntax-only") == 0) {
 343                         mode = ParseOnly;
 344                 } else if(strncmp(arg, "-I", 2) == 0) {
 345                         const char *opt;
 346                         GET_ARG_AFTER(opt, "-I");
 347                         obstack_printf(&cppflags_obst, " -I%s", opt);
 348                 } else if(strncmp(arg, "-D", 2) == 0) {
 349                         const char *opt;
 350                         GET_ARG_AFTER(opt, "-D");
 351                         obstack_printf(&cppflags_obst, " -D%s", opt);
 352                 } else if(strcmp(arg, "--dump") == 0) {
 353                         do_dump = true;
 354                 } else if(strcmp(arg, "--dump-function") == 0) {
 355                         ++i;
 356                         if(i >= argc) {
 357                                 fprintf(stderr, "error: "
 358                                         "expected argument after '--dump-function'\n");
 359                                 argument_errors = true;
 360                                 break;
 361                         }
 362                         dumpfunction = argv[i];
 363                         mode         = CompileDump;
 364                 } else if(strcmp(arg, "-v") == 0) {
 365                         verbose = 1;
 366                 } else if(arg[0] == '-' && arg[1] == 'f') {
 367                         const char *opt;
 368                         GET_ARG_AFTER(opt, "-f");
 369                         int res = firm_option(opt);
 370                         if (res == 0) {
 371                                 fprintf(stderr, "error: unknown Firm option '-f %s'\n", opt);
 372                                 argument_errors = true;
 373                                 continue;
 374                         } else if (res == -1) {
 375                                 help_displayed = true;
 376                         }
 377                 } else if(arg[0] == '-' && arg[1] == 'b') {
 378                         const char *opt;
 379                         GET_ARG_AFTER(opt, "-b");
 380                         int res = firm_be_option(opt);
 381                         if (res == 0) {
 382                                 fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 383                                         opt);
 384                                 argument_errors = true;
 385                         } else if (res == -1) {
 386                                 help_displayed = true;
 387                         }
 388                 } else if(arg[0] == '-') {
 389                         if (arg[1] == '\0') {
 390                                 if(input != NULL) {
 391                                         fprintf(stderr, "error: multiple input files specified\n");
 392                                         argument_errors = true;
 393                                 } else {
 394                                         input = arg;
 395                                 }
 396                         } else if(strcmp(arg, "-pedantic") == 0) {
 397                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 398                         } else if(arg[1] == 'O' ||
 399                                         arg[1] == 'f' ||
 400                                         arg[1] == 'W' ||
 401                                         arg[1] == 'g' ||
 402                                         strncmp(arg + 1, "std=", 4) == 0) {
 403                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 404                         } else {
 405                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 406                                 argument_errors = true;
 407                         }
 408                 } else {
 409                         if(input != NULL) {
 410                                 fprintf(stderr, "error: multiple input files specified\n");
 411                                 argument_errors = true;
 412                         } else {
 413                                 input = arg;
 414                         }
 415                 }
 416         }
 417
 418         if(help_displayed) {
 419                 return !argument_errors;
 420         }
 421         if(argument_errors) {
 422                 usage(argv[0]);
 423                 return 1;
 424         }
 425
 426         FILE *out;
 427         char  outnamebuf[4096];
 428         if(outname == NULL) {
 429                 switch(mode) {
 430                 case PrintAst:
 431                 case PrintFluffy:
 432                 case LexTest:
 433                 case ParseOnly:
 434                         break;
 435                 case Compile:
 436                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
 437                         outname = outnamebuf;
 438                         break;
 439                 case CompileAssemble:
 440                         get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
 441                         outname = outnamebuf;
 442                         break;
 443                 case CompileDump:
 444                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
 445                                         ".vcg");
 446                         outname = outnamebuf;
 447                         break;
 448                 case CompileAssembleLink:
 449                         outname = "a.out";
 450                         break;
 451                 }
 452         }
 453
 454         if(outname != NULL) {
 455                 if(strcmp(outname, "-") == 0) {
 456                         out = stdout;
 457                 } else {
 458                         out = fopen(outname, "w");
 459                         if(out == NULL) {
 460                                 fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
 461                                         strerror(errno));
 462                                 return 1;
 463                         }
 464                 }
 465         }
 466
 467         FILE *in;
 468         if(input == NULL) {
 469                 fprintf(stderr, "%s: no input files\n", argv[0]);
 470                 return 1;
 471         } else if(strcmp(input, "-") == 0) {
 472                 in    = stdin;
 473                 input = "<stdin>";
 474         } else {
 475                 in = fopen(input, "r");
 476                 if(in == NULL) {
 477                         fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
 478                         return 1;
 479                 }
 480         }
 481
 482         if(mode == LexTest) {
 483                 lextest(in, input);
 484                 fclose(in);
 485                 return 0;
 486         }
 487
 488         FILE *preprocessed_in = preprocess(in, input);
 489         translation_unit_t *const unit = do_parsing(preprocessed_in, input);
 490         pclose(preprocessed_in);
 491         if(unit == NULL)
 492                 return 1;
 493
 494         if(mode == PrintAst) {
 495                 ast_set_output(out);
 496                 print_ast(unit);
 497                 return 0;
 498         }
 499         if(mode == PrintFluffy) {
 500                 write_fluffy_decls(out, unit);
 501         }
 502
 503         gen_firm_init();
 504         create_firm_prog(unit);
 505
 506         if(mode == ParseOnly) {
 507                 return 0;
 508         }
 509
 510         FILE *asm_out;
 511         char  asm_tempfile[1024];
 512         if(mode == CompileDump) {
 513                 asm_out = NULL;
 514                 firm_be_opt.selection = BE_NONE;
 515         } else if(mode == Compile) {
 516                 asm_out = out;
 517         } else {
 518                 asm_out
 519                         = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
 520         }
 521         gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
 522
 523         if(mode == CompileDump) {
 524                 /* find irg */
 525                 ident    *id     = new_id_from_str(dumpfunction);
 526                 ir_graph *irg    = NULL;
 527                 int       n_irgs = get_irp_n_irgs();
 528                 for(int i = 0; i < n_irgs; ++i) {
 529                         ir_graph *tirg   = get_irp_irg(i);
 530                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
 531                         if(irg_id == id) {
 532                                 irg = tirg;
 533                                 break;
 534                         }
 535                 }
 536
 537                 if(irg == NULL) {
 538                         fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
 539                         return 1;
 540                 }
 541
 542                 dump_ir_block_graph_file(irg, out);
 543                 fclose(out);
 544                 return 0;
 545         }
 546
 547         fclose(asm_out);
 548
 549         /* assemble assembler and create object file */
 550         char obj_tfile[1024];
 551         if(mode == CompileAssemble || mode == CompileAssembleLink) {
 552                 const char *obj_outfile;
 553                 if(mode == CompileAssemble) {
 554                         fclose(out);
 555                         obj_outfile = outname;
 556                 } else {
 557                         FILE *tempf
 558                                 = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
 559                         fclose(tempf);
 560                         obj_outfile = obj_tfile;
 561                 }
 562
 563                 assemble(obj_outfile, asm_tempfile);
 564         }
 565
 566         /* link object file */
 567         if(mode == CompileAssembleLink) {
 568                 do_link(outname, obj_tfile);
 569         }
 570
 571         obstack_free(&cppflags_obst, NULL);
 572
 573         exit_ast2firm();
 574         exit_parser();
 575         exit_ast();
 576         exit_lexer();
 577         exit_typehash();
 578         exit_types();
 579         exit_tokens();
 580         exit_symbol_table();
 581         return 0;
 582 }