lib.c

   1 /*
   2  * 'sparse' library helper routines.
   3  *
   4  * Copyright (C) 2003 Transmeta Corp.
   5  *               2003-2004 Linus Torvalds
   6  *
   7  *  Licensed under the Open Software License version 1.1
   8  */
   9 #include <ctype.h>
  10 #include <fcntl.h>
  11 #include <stdarg.h>
  12 #include <stddef.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <unistd.h>
  17 #include <assert.h>
  18
  19 #include <sys/types.h>
  20
  21 #include "lib.h"
  22 #include "allocate.h"
  23 #include "token.h"
  24 #include "parse.h"
  25 #include "symbol.h"
  26 #include "expression.h"
  27 #include "scope.h"
  28 #include "linearize.h"
  29 #include "target.h"
  30
  31 int verbose, optimize, optimize_size, preprocessing;
  32 int die_if_error = 0;
  33
  34 #ifndef __GNUC__
  35 # define __GNUC__ 2
  36 # define __GNUC_MINOR__ 95
  37 # define __GNUC_PATCHLEVEL__ 0
  38 #endif
  39
  40 int gcc_major = __GNUC__;
  41 int gcc_minor = __GNUC_MINOR__;
  42 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  43
  44 struct token *skip_to(struct token *token, int op)
  45 {
  46         while (!match_op(token, op) && !eof_token(token))
  47                 token = token->next;
  48         return token;
  49 }
  50
  51 struct token *expect(struct token *token, int op, const char *where)
  52 {
  53         if (!match_op(token, op)) {
  54                 static struct token bad_token;
  55                 if (token != &bad_token) {
  56                         bad_token.next = token;
  57                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  58                         sparse_error(token->pos, "got %s", show_token(token));
  59                 }
  60                 if (op == ';')
  61                         return skip_to(token, op);
  62                 return &bad_token;
  63         }
  64         return token->next;
  65 }
  66
  67 unsigned int hexval(unsigned int c)
  68 {
  69         int retval = 256;
  70         switch (c) {
  71         case '0'...'9':
  72                 retval = c - '0';
  73                 break;
  74         case 'a'...'f':
  75                 retval = c - 'a' + 10;
  76                 break;
  77         case 'A'...'F':
  78                 retval = c - 'A' + 10;
  79                 break;
  80         }
  81         return retval;
  82 }
  83
  84 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
  85 {
  86         static char buffer[512];
  87         const char *name;
  88
  89         vsprintf(buffer, fmt, args);
  90         name = stream_name(pos.stream);
  91
  92         fprintf(stderr, "%s:%d:%d: %s%s\n",
  93                 name, pos.line, pos.pos, type, buffer);
  94 }
  95
  96 static int max_warnings = 100;
  97 static int show_info = 1;
  98
  99 void info(struct position pos, const char * fmt, ...)
 100 {
 101         va_list args;
 102
 103         if (!show_info)
 104                 return;
 105         va_start(args, fmt);
 106         do_warn("", pos, fmt, args);
 107         va_end(args);
 108 }
 109
 110 void warning(struct position pos, const char * fmt, ...)
 111 {
 112         va_list args;
 113
 114         if (!max_warnings) {
 115                 show_info = 0;
 116                 return;
 117         }
 118
 119         if (!--max_warnings) {
 120                 show_info = 0;
 121                 fmt = "too many warnings";
 122         }
 123
 124         va_start(args, fmt);
 125         do_warn("warning: ", pos, fmt, args);
 126         va_end(args);
 127 }
 128
 129 static void do_error(struct position pos, const char * fmt, va_list args)
 130 {
 131         static int errors = 0;
 132         die_if_error = 1;
 133         show_info = 1;
 134         /* Shut up warnings after an error */
 135         max_warnings = 0;
 136         if (errors > 100) {
 137                 static int once = 0;
 138                 show_info = 0;
 139                 if (once)
 140                         return;
 141                 fmt = "too many errors";
 142                 once = 1;
 143         }
 144
 145         do_warn("error: ", pos, fmt, args);
 146         errors++;
 147 }
 148
 149 void sparse_error(struct position pos, const char * fmt, ...)
 150 {
 151         va_list args;
 152         va_start(args, fmt);
 153         do_error(pos, fmt, args);
 154         va_end(args);
 155 }
 156
 157 void expression_error(struct expression *expr, const char *fmt, ...)
 158 {
 159         va_list args;
 160         va_start(args, fmt);
 161         do_error(expr->pos, fmt, args);
 162         va_end(args);
 163         expr->ctype = &bad_ctype;
 164 }
 165
 166 void error_die(struct position pos, const char * fmt, ...)
 167 {
 168         va_list args;
 169         va_start(args, fmt);
 170         do_warn("error: ", pos, fmt, args);
 171         va_end(args);
 172         exit(1);
 173 }
 174
 175 void die(const char *fmt, ...)
 176 {
 177         va_list args;
 178         static char buffer[512];
 179
 180         va_start(args, fmt);
 181         vsnprintf(buffer, sizeof(buffer), fmt, args);
 182         va_end(args);
 183
 184         fprintf(stderr, "%s\n", buffer);
 185         exit(1);
 186 }
 187
 188 static unsigned int pre_buffer_size;
 189 static char pre_buffer[8192];
 190
 191 int Wdefault_bitfield_sign = 0;
 192 int Wone_bit_signed_bitfield = 1;
 193 int Wcast_truncate = 1;
 194 int Wbitwise = 0;
 195 int Wtypesign = 0;
 196 int Wcontext = 1;
 197 int Wundefined_preprocessor = 0;
 198 int Wptr_subtraction_blows = 0;
 199 int Wcast_to_address_space = 0;
 200 int Wdecl = 1;
 201 int Wtransparent_union = 1;
 202 int Wshadow = 0;
 203 int Waddress_space = 1;
 204 int Wenum_mismatch = 1;
 205 int Wdo_while = 1;
 206 int Wuninitialized = 1;
 207 int Wold_initializer = 1;
 208 int Wnon_pointer_null = 1;
 209 int Wparen_string = 0;
 210
 211 int dbg_entry = 0;
 212 int dbg_dead = 0;
 213
 214 int preprocess_only;
 215
 216 #define CMDLINE_INCLUDE 20
 217 int cmdline_include_nr = 0;
 218 struct cmdline_include cmdline_include[CMDLINE_INCLUDE];
 219
 220
 221 void add_pre_buffer(const char *fmt, ...)
 222 {
 223         va_list args;
 224         unsigned int size;
 225
 226         va_start(args, fmt);
 227         size = pre_buffer_size;
 228         size += vsnprintf(pre_buffer + size,
 229                 sizeof(pre_buffer) - size,
 230                 fmt, args);
 231         pre_buffer_size = size;
 232         va_end(args);
 233 }
 234
 235 static char **handle_switch_D(char *arg, char **next)
 236 {
 237         const char *name = arg + 1;
 238         const char *value = "1";
 239         for (;;) {
 240                 char c;
 241                 c = *++arg;
 242                 if (!c)
 243                         break;
 244                 if (isspace((unsigned char)c) || c == '=') {
 245                         *arg = '\0';
 246                         value = arg + 1;
 247                         break;
 248                 }
 249         }
 250         add_pre_buffer("#define %s %s\n", name, value);
 251         return next;
 252 }
 253
 254 static char **handle_switch_E(char *arg, char **next)
 255 {
 256         if (arg[1] == '\0')
 257                 preprocess_only = 1;
 258         return next;
 259 }
 260
 261 static char **handle_switch_I(char *arg, char **next)
 262 {
 263         char *path = arg+1;
 264
 265         switch (arg[1]) {
 266         case '-':
 267                 add_pre_buffer("#split_include\n");
 268                 break;
 269
 270         case '\0':      /* Plain "-I" */
 271                 path = *++next;
 272                 if (!path)
 273                         die("missing argument for -I option");
 274                 /* Fall through */
 275         default:
 276                 add_pre_buffer("#add_include \"%s/\"\n", path);
 277         }
 278         return next;
 279 }
 280
 281 static void add_cmdline_include(char *filename)
 282 {
 283         int fd = open(filename, O_RDONLY);
 284         if (fd < 0) {
 285                 perror(filename);
 286                 return;
 287         }
 288         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 289                 die("too many include files for %s\n", filename);
 290         cmdline_include[cmdline_include_nr].filename = filename;
 291         cmdline_include[cmdline_include_nr].fd = fd;
 292         cmdline_include_nr++;
 293 }
 294
 295 static char **handle_switch_i(char *arg, char **next)
 296 {
 297         if (*next && !strcmp(arg, "include"))
 298                 add_cmdline_include(*++next);
 299         else if (*next && !strcmp(arg, "imacros"))
 300                 add_cmdline_include(*++next);
 301         else if (*next && !strcmp(arg, "isystem")) {
 302                 char *path = *++next;
 303                 if (!path)
 304                         die("missing argument for -isystem option");
 305                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 306         }
 307         return next;
 308 }
 309
 310 static char **handle_switch_M(char *arg, char **next)
 311 {
 312         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 313                 if (!*next)
 314                         die("missing argument for -%s option", arg);
 315                 return next + 1;
 316         }
 317         return next;
 318 }
 319
 320 static char **handle_switch_m(char *arg, char **next)
 321 {
 322         if (!strcmp(arg, "m64")) {
 323                 bits_in_long = 64;
 324                 max_int_alignment = 8;
 325                 bits_in_pointer = 64;
 326                 pointer_alignment = 8;
 327         }
 328         return next;
 329 }
 330
 331 static char **handle_switch_o(char *arg, char **next)
 332 {
 333         if (!strcmp (arg, "o") && *next)
 334                 return next + 1; // "-o foo"
 335         else
 336                 return next;     // "-ofoo" or (bogus) terminal "-o"
 337 }
 338
 339 static const struct warning {
 340         const char *name;
 341         int *flag;
 342 } warnings[] = {
 343         { "cast-to-as", &Wcast_to_address_space },
 344         { "decl", &Wdecl },
 345         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 346         { "cast-truncate", &Wcast_truncate },
 347         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 348         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 349         { "undef", &Wundefined_preprocessor },
 350         { "bitwise", &Wbitwise },
 351         { "typesign", &Wtypesign },
 352         { "context", &Wcontext },
 353         { "transparent-union", &Wtransparent_union },
 354         { "shadow", &Wshadow },
 355         { "address-space", &Waddress_space },
 356         { "enum-mismatch", &Wenum_mismatch },
 357         { "do-while", &Wdo_while },
 358         { "uninitialized", &Wuninitialized },
 359         { "old-initializer", &Wold_initializer },
 360         { "non-pointer-null", &Wnon_pointer_null },
 361         { "paren-string", &Wparen_string },
 362 };
 363
 364 enum {
 365         WARNING_OFF,
 366         WARNING_ON,
 367         WARNING_FORCE_OFF
 368 };
 369
 370
 371 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 372 {
 373         int flag = WARNING_ON;
 374         char *p = arg + 1;
 375         unsigned i;
 376
 377         if (!strcmp(p, "all")) {
 378                 for (i = 0; i < n; i++) {
 379                         if (*warnings[i].flag != WARNING_FORCE_OFF)
 380                                 *warnings[i].flag = WARNING_ON;
 381                 }
 382         }
 383
 384         // Prefixes "no" and "no-" mean to turn warning off.
 385         if (p[0] == 'n' && p[1] == 'o') {
 386                 p += 2;
 387                 if (p[0] == '-')
 388                         p++;
 389                 flag = WARNING_FORCE_OFF;
 390         }
 391
 392         for (i = 0; i < n; i++) {
 393                 if (!strcmp(p,warnings[i].name)) {
 394                         *warnings[i].flag = flag;
 395                         return next;
 396                 }
 397         }
 398
 399         // Unknown.
 400         return NULL;
 401 }
 402
 403 static char **handle_switch_W(char *arg, char **next)
 404 {
 405         char ** ret = handle_onoff_switch(arg, next, warnings, sizeof warnings/sizeof warnings[0]);
 406         if (ret)
 407                 return ret;
 408
 409         // Unknown.
 410         return next;
 411 }
 412
 413 static struct warning debugs[] = {
 414         { "entry", &dbg_entry},
 415         { "dead", &dbg_dead},
 416 };
 417
 418
 419 static char **handle_switch_v(char *arg, char **next)
 420 {
 421         char ** ret = handle_onoff_switch(arg, next, debugs, sizeof debugs/sizeof debugs[0]);
 422         if (ret)
 423                 return ret;
 424
 425         // Unknown.
 426         do {
 427                 verbose++;
 428         } while (*++arg == 'v');
 429         return next;
 430 }
 431
 432
 433 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 434 {
 435         unsigned i;
 436
 437         for (i = 0; i < n; i++) {
 438                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 439                         *warnings[i].flag = WARNING_OFF;
 440         }
 441 }
 442
 443 static void handle_switch_W_finalize(void)
 444 {
 445         handle_onoff_switch_finalize(warnings, sizeof(warnings) / sizeof(warnings[0]));
 446 }
 447
 448 static void handle_switch_v_finalize(void)
 449 {
 450         handle_onoff_switch_finalize(debugs, sizeof(debugs) / sizeof(debugs[0]));
 451 }
 452
 453 static char **handle_switch_U(char *arg, char **next)
 454 {
 455         const char *name = arg + 1;
 456         add_pre_buffer ("#undef %s\n", name);
 457         return next;
 458 }
 459
 460 static char **handle_switch_O(char *arg, char **next)
 461 {
 462         int level = 1;
 463         if (arg[1] >= '0' && arg[1] <= '9')
 464                 level = arg[1] - '0';
 465         optimize = level;
 466         optimize_size = arg[1] == 's';
 467         return next;
 468 }
 469
 470 static char **handle_switch_f(char *arg, char **next)
 471 {
 472         int flag = 1;
 473
 474         arg++;
 475         if (!strncmp(arg, "no-", 3)) {
 476                 flag = 0;
 477                 arg += 3;
 478         }
 479         /* handle switch here.. */
 480         return next;
 481 }
 482
 483 static char **handle_switch_G(char *arg, char **next)
 484 {
 485         if (!strcmp (arg, "G") && *next)
 486                 return next + 1; // "-G 0"
 487         else
 488                 return next;     // "-G0" or (bogus) terminal "-G"
 489 }
 490
 491 static char **handle_nostdinc(char *arg, char **next)
 492 {
 493         add_pre_buffer("#nostdinc\n");
 494         return next;
 495 }
 496
 497 static char **handle_dirafter(char *arg, char **next)
 498 {
 499         char *path = *++next;
 500         if (!path)
 501                 die("missing argument for -dirafter option");
 502         add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 503         return next;
 504 }
 505
 506 struct switches {
 507         const char *name;
 508         char **(*fn)(char *, char **);
 509 };
 510
 511 char **handle_switch(char *arg, char **next)
 512 {
 513         static struct switches cmd[] = {
 514                 { "nostdinc", handle_nostdinc },
 515                 { "dirafter", handle_dirafter },
 516                 { NULL, NULL }
 517         };
 518         struct switches *s;
 519
 520         switch (*arg) {
 521         case 'D': return handle_switch_D(arg, next);
 522         case 'E': return handle_switch_E(arg, next);
 523         case 'I': return handle_switch_I(arg, next);
 524         case 'i': return handle_switch_i(arg, next);
 525         case 'M': return handle_switch_M(arg, next);
 526         case 'm': return handle_switch_m(arg, next);
 527         case 'o': return handle_switch_o(arg, next);
 528         case 'U': return handle_switch_U(arg, next);
 529         case 'v': return handle_switch_v(arg, next);
 530         case 'W': return handle_switch_W(arg, next);
 531         case 'O': return handle_switch_O(arg, next);
 532         case 'f': return handle_switch_f(arg, next);
 533         case 'G': return handle_switch_G(arg, next);
 534         default:
 535                 break;
 536         }
 537
 538         s = cmd;
 539         while (s->name) {
 540                 if (!strcmp(s->name, arg))
 541                         return s->fn(arg, next);
 542                 s++;
 543         }
 544
 545         /*
 546          * Ignore unknown command line options:
 547          * they're probably gcc switches
 548          */
 549         return next;
 550 }
 551
 552 void declare_builtin_functions(void)
 553 {
 554         /* Gaah. gcc knows tons of builtin <string.h> functions */
 555         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 556         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 557         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 558         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 559         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 560         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 561         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 562         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 563         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 564         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 565         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 566         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 567
 568         /* And some random ones.. */
 569         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 570         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 571         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 572         add_pre_buffer("extern void __builtin_trap(void);\n");
 573         add_pre_buffer("extern int __builtin_ffs(int);\n");
 574         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 575         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 576         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 577         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 578         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 579         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 580         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 581         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 582         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 583         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 584         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 585 }
 586
 587 void create_builtin_stream(void)
 588 {
 589         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 590         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 591         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 592         add_pre_buffer("#define __extension__\n");
 593         add_pre_buffer("#define __pragma__\n");
 594
 595         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 596         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 597         // it is "long unsigned int".  In either case we can probably
 598         // get away with this.  We need the #weak_define as cgcc will define
 599         // the right __SIZE_TYPE__.
 600         add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 601         add_pre_buffer("#weak_define __STDC__ 1\n");
 602
 603         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 604         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 605         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 606         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 607         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 608         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 609         add_pre_buffer("#define __builtin_va_end(arg)\n");
 610         add_pre_buffer("#define __builtin_offsetof(type, name) ((__SIZE_TYPE__)&((type *)(0ul))->name)\n");
 611
 612         /* FIXME! We need to do these as special magic macros at expansion time! */
 613         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 614
 615         if (optimize)
 616                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 617         if (optimize_size)
 618                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 619 }
 620
 621 static struct symbol_list *sparse_tokenstream(struct token *token)
 622 {
 623         // Preprocess the stream
 624         token = preprocess(token);
 625
 626         if (preprocess_only) {
 627                 while (!eof_token(token)) {
 628                         int prec = 1;
 629                         struct token *next = token->next;
 630                         const char *separator = "";
 631                         if (next->pos.whitespace)
 632                                 separator = " ";
 633                         if (next->pos.newline) {
 634                                 separator = "\n\t\t\t\t\t";
 635                                 prec = next->pos.pos;
 636                                 if (prec > 4)
 637                                         prec = 4;
 638                         }
 639                         printf("%s%.*s", show_token(token), prec, separator);
 640                         token = next;
 641                 }
 642                 putchar('\n');
 643
 644                 return NULL;
 645         }
 646
 647         // Parse the resulting C code
 648         while (!eof_token(token))
 649                 token = external_declaration(token, &translation_unit_used_list);
 650         return translation_unit_used_list;
 651 }
 652
 653 static struct symbol_list *sparse_file(const char *filename)
 654 {
 655         int fd;
 656         struct token *token;
 657
 658         if (strcmp (filename, "-") == 0) {
 659                 fd = 0;
 660         } else {
 661                 fd = open(filename, O_RDONLY);
 662                 if (fd < 0)
 663                         die("No such file: %s", filename);
 664         }
 665
 666         // Tokenize the input stream
 667         token = tokenize(filename, fd, NULL, includepath);
 668         close(fd);
 669
 670         return sparse_tokenstream(token);
 671 }
 672
 673 /*
 674  * This handles the "-include" directive etc: we're in global
 675  * scope, and all types/macros etc will affect all the following
 676  * files.
 677  *
 678  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 679  * affect all subsequent files too, i.e. we can have non-local
 680  * behaviour between files!
 681  */
 682 static struct symbol_list *sparse_initial(void)
 683 {
 684         struct token *token;
 685         int i;
 686
 687         // Prepend any "include" file to the stream.
 688         // We're in global scope, it will affect all files!
 689         token = NULL;
 690         for (i = cmdline_include_nr - 1; i >= 0; i--)
 691                 token = tokenize(cmdline_include[i].filename, cmdline_include[i].fd,
 692                                  token, includepath);
 693
 694         // Prepend the initial built-in stream
 695         token = tokenize_buffer(pre_buffer, pre_buffer_size, token);
 696         return sparse_tokenstream(token);
 697 }
 698
 699 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 700 {
 701         char **args;
 702         struct symbol_list *list;
 703
 704         // Initialize symbol stream first, so that we can add defines etc
 705         init_symbols();
 706
 707         args = argv;
 708         for (;;) {
 709                 char *arg = *++args;
 710                 if (!arg)
 711                         break;
 712
 713                 if (arg[0] == '-' && arg[1]) {
 714                         args = handle_switch(arg+1, args);
 715                         continue;
 716                 }
 717                 add_ptr_list_notag(filelist, arg);
 718         }
 719         handle_switch_W_finalize();
 720         handle_switch_v_finalize();
 721
 722         list = NULL;
 723         if (!ptr_list_empty(filelist)) {
 724                 // Initialize type system
 725                 init_ctype();
 726
 727                 create_builtin_stream();
 728                 add_pre_buffer("#define __CHECKER__ 1\n");
 729                 if (!preprocess_only)
 730                         declare_builtin_functions();
 731
 732                 list = sparse_initial();
 733
 734                 /*
 735                  * Protect the initial token allocations, since
 736                  * they need to survive all the others
 737                  */
 738                 protect_token_alloc();
 739         }
 740         return list;
 741 }
 742
 743 struct symbol_list * __sparse(char *filename)
 744 {
 745         struct symbol_list *res;
 746
 747         /* Clear previous symbol list */
 748         translation_unit_used_list = NULL;
 749
 750         new_file_scope();
 751         res = sparse_file(filename);
 752
 753         /* Drop the tokens for this file after parsing */
 754         clear_token_alloc();
 755
 756         /* And return it */
 757         return res;
 758 }
 759
 760 struct symbol_list * sparse(char *filename)
 761 {
 762         struct symbol_list *res = __sparse(filename);
 763
 764         /* Evaluate the complete symbol list */
 765         evaluate_symbol_list(res);
 766
 767         return res;
 768 }