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 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 = 0;
 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
 208 int dbg_entry = 0;
 209 int dbg_dead = 0;
 210
 211 int preprocess_only;
 212 char *include;
 213
 214 #define CMDLINE_INCLUDE 20
 215 int cmdline_include_nr = 0;
 216 struct cmdline_include cmdline_include[CMDLINE_INCLUDE];
 217
 218
 219 void add_pre_buffer(const char *fmt, ...)
 220 {
 221         va_list args;
 222         unsigned int size;
 223
 224         va_start(args, fmt);
 225         size = pre_buffer_size;
 226         size += vsnprintf(pre_buffer + size,
 227                 sizeof(pre_buffer) - size,
 228                 fmt, args);
 229         pre_buffer_size = size;
 230         va_end(args);
 231 }
 232
 233 static char **handle_switch_D(char *arg, char **next)
 234 {
 235         const char *name = arg + 1;
 236         const char *value = "1";
 237         for (;;) {
 238                 char c;
 239                 c = *++arg;
 240                 if (!c)
 241                         break;
 242                 if (isspace((unsigned char)c) || c == '=') {
 243                         *arg = '\0';
 244                         value = arg + 1;
 245                         break;
 246                 }
 247         }
 248         add_pre_buffer("#define %s %s\n", name, value);
 249         return next;
 250 }
 251
 252 static char **handle_switch_E(char *arg, char **next)
 253 {
 254         preprocess_only = 1;
 255         return next;
 256 }
 257
 258 static char **handle_switch_I(char *arg, char **next)
 259 {
 260         char *path = arg+1;
 261
 262         switch (arg[1]) {
 263         case '-':
 264                 add_pre_buffer("#split_include\n");
 265                 break;
 266
 267         case '\0':      /* Plain "-I" */
 268                 path = *++next;
 269                 if (!path)
 270                         die("missing argument for -I option");
 271                 /* Fallthrough */
 272         default:
 273                 add_pre_buffer("#add_include \"%s/\"\n", path);
 274         }
 275         return next;
 276 }
 277
 278 static void add_cmdline_include(char *filename)
 279 {
 280         int fd = open(filename, O_RDONLY);
 281         if (fd < 0) {
 282                 perror(filename);
 283                 return;
 284         }
 285         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 286                 die("too many include files for %s\n", filename);
 287         cmdline_include[cmdline_include_nr].filename = filename;
 288         cmdline_include[cmdline_include_nr].fd = fd;
 289         cmdline_include_nr++;
 290 }
 291
 292 static char **handle_switch_i(char *arg, char **next)
 293 {
 294         if (*next && !strcmp(arg, "include"))
 295                 add_cmdline_include(*++next);
 296         else if (*next && !strcmp(arg, "imacros"))
 297                 add_cmdline_include(*++next);
 298         else if (*next && !strcmp(arg, "isystem")) {
 299                 char *path = *++next;
 300                 if (!path)
 301                         die("missing argument for -isystem option");
 302                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 303         }
 304         return next;
 305 }
 306
 307 static char **handle_switch_M(char *arg, char **next)
 308 {
 309         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 310                 if (!*next)
 311                         die("missing argument for -%s option", arg);
 312                 return next + 1;
 313         }
 314         return next;
 315 }
 316
 317 static char **handle_switch_m(char *arg, char **next)
 318 {
 319         if (!strcmp(arg, "m64")) {
 320                 bits_in_long = 64;
 321                 max_int_alignment = 8;
 322                 bits_in_pointer = 64;
 323                 pointer_alignment = 8;
 324         }
 325         return next;
 326 }
 327
 328 static char **handle_switch_o(char *arg, char **next)
 329 {
 330         if (!strcmp (arg, "o") && *next)
 331                 return next + 1; // "-o foo"
 332         else
 333                 return next;     // "-ofoo" or (bogus) terminal "-o"
 334 }
 335
 336 static const struct warning {
 337         const char *name;
 338         int *flag;
 339 } warnings[] = {
 340         { "cast-to-as", &Wcast_to_address_space },
 341         { "decl", &Wdecl },
 342         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 343         { "cast-truncate", &Wcast_truncate },
 344         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 345         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 346         { "undef", &Wundefined_preprocessor },
 347         { "bitwise", &Wbitwise },
 348         { "typesign", &Wtypesign },
 349         { "context", &Wcontext },
 350         { "transparent-union", &Wtransparent_union },
 351         { "shadow", &Wshadow },
 352         { "address-space", &Waddress_space },
 353         { "enum-mismatch", &Wenum_mismatch },
 354         { "do-while", &Wdo_while },
 355         { "uninitialized", &Wuninitialized },
 356 };
 357
 358 enum {
 359         WARNING_OFF,
 360         WARNING_ON,
 361         WARNING_FORCE_OFF
 362 };
 363
 364
 365 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 366 {
 367         int flag = WARNING_ON;
 368         char *p = arg + 1;
 369         unsigned i;
 370
 371         if (!strcmp(p, "all")) {
 372                 for (i = 0; i < n; i++) {
 373                         if (*warnings[i].flag != WARNING_FORCE_OFF)
 374                                 *warnings[i].flag = WARNING_ON;
 375                 }
 376         }
 377
 378         // Prefixes "no" and "no-" mean to turn warning off.
 379         if (p[0] == 'n' && p[1] == 'o') {
 380                 p += 2;
 381                 if (p[0] == '-')
 382                         p++;
 383                 flag = WARNING_FORCE_OFF;
 384         }
 385
 386         for (i = 0; i < n; i++) {
 387                 if (!strcmp(p,warnings[i].name)) {
 388                         *warnings[i].flag = flag;
 389                         return next;
 390                 }
 391         }
 392
 393         // Unknown.
 394         return NULL;
 395 }
 396
 397 static char **handle_switch_W(char *arg, char **next)
 398 {
 399         char ** ret = handle_onoff_switch(arg, next, warnings, sizeof warnings/sizeof warnings[0]);
 400         if (ret)
 401                 return ret;
 402
 403         // Unknown.
 404         return next;
 405 }
 406
 407 static struct warning debugs[] = {
 408         { "entry", &dbg_entry},
 409         { "dead", &dbg_dead},
 410 };
 411
 412
 413 static char **handle_switch_v(char *arg, char **next)
 414 {
 415         char ** ret = handle_onoff_switch(arg, next, debugs, sizeof debugs/sizeof debugs[0]);
 416         if (ret)
 417                 return ret;
 418
 419         // Unknown.
 420         do {
 421                 verbose++;
 422         } while (*++arg == 'v');
 423         return next;
 424 }
 425
 426
 427 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 428 {
 429         unsigned i;
 430
 431         for (i = 0; i < n; i++) {
 432                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 433                         *warnings[i].flag = WARNING_OFF;
 434         }
 435 }
 436
 437 static void handle_switch_W_finalize(void)
 438 {
 439         handle_onoff_switch_finalize(warnings, sizeof(warnings) / sizeof(warnings[0]));
 440 }
 441
 442 static void handle_switch_v_finalize(void)
 443 {
 444         handle_onoff_switch_finalize(debugs, sizeof(debugs) / sizeof(debugs[0]));
 445 }
 446
 447 static char **handle_switch_U(char *arg, char **next)
 448 {
 449         const char *name = arg + 1;
 450         add_pre_buffer ("#undef %s\n", name);
 451         return next;
 452 }
 453
 454 static char **handle_switch_O(char *arg, char **next)
 455 {
 456         int level = 1;
 457         if (arg[1] >= '0' && arg[1] <= '9')
 458                 level = arg[1] - '0';
 459         optimize = level;
 460         optimize_size = arg[1] == 's';
 461         return next;
 462 }
 463
 464 static char **handle_switch_f(char *arg, char **next)
 465 {
 466         int flag = 1;
 467
 468         arg++;
 469         if (!strncmp(arg, "no-", 3)) {
 470                 flag = 0;
 471                 arg += 3;
 472         }
 473         /* handle switch here.. */
 474         return next;
 475 }
 476
 477 static char **handle_switch_G(char *arg, char **next)
 478 {
 479         if (!strcmp (arg, "G") && *next)
 480                 return next + 1; // "-G 0"
 481         else
 482                 return next;     // "-G0" or (bogus) terminal "-G"
 483 }
 484
 485 static char **handle_nostdinc(char *arg, char **next)
 486 {
 487         add_pre_buffer("#nostdinc\n");
 488         return next;
 489 }
 490
 491 static char **handle_dirafter(char *arg, char **next)
 492 {
 493         char *path = *++next;
 494         if (!path)
 495                 die("missing argument for -dirafter option");
 496         add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 497         return next;
 498 }
 499
 500 struct switches {
 501         const char *name;
 502         char **(*fn)(char *, char **);
 503 };
 504
 505 char **handle_switch(char *arg, char **next)
 506 {
 507         static struct switches cmd[] = {
 508                 { "nostdinc", handle_nostdinc },
 509                 { "dirafter", handle_dirafter },
 510                 { NULL, NULL }
 511         };
 512         struct switches *s;
 513
 514         switch (*arg) {
 515         case 'D': return handle_switch_D(arg, next);
 516         case 'E': return handle_switch_E(arg, next);
 517         case 'I': return handle_switch_I(arg, next);
 518         case 'i': return handle_switch_i(arg, next);
 519         case 'M': return handle_switch_M(arg, next);
 520         case 'm': return handle_switch_m(arg, next);
 521         case 'o': return handle_switch_o(arg, next);
 522         case 'U': return handle_switch_U(arg, next);
 523         case 'v': return handle_switch_v(arg, next);
 524         case 'W': return handle_switch_W(arg, next);
 525         case 'O': return handle_switch_O(arg, next);
 526         case 'f': return handle_switch_f(arg, next);
 527         case 'G': return handle_switch_G(arg, next);
 528         default:
 529                 break;
 530         }
 531
 532         s = cmd;
 533         while (s->name) {
 534                 if (!strcmp(s->name, arg))
 535                         return s->fn(arg, next);
 536                 s++;
 537         }
 538
 539         /*
 540          * Ignore unknown command line options:
 541          * they're probably gcc switches
 542          */
 543         return next;
 544 }
 545
 546 void declare_builtin_functions(void)
 547 {
 548         /* Gaah. gcc knows tons of builtin <string.h> functions */
 549         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 550         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 551         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 552         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 553         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 554         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 555         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 556         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 557         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 558         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 559
 560         /* And some random ones.. */
 561         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 562         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 563         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 564         add_pre_buffer("extern void __builtin_trap(void);\n");
 565         add_pre_buffer("extern int __builtin_ffs(int);\n");
 566         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 567         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 568         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 569         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 570         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 571         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 572         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 573         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 574         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 575         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 576         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 577 }
 578
 579 void create_builtin_stream(void)
 580 {
 581         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 582         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 583         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 584         add_pre_buffer("#define __extension__\n");
 585         add_pre_buffer("#define __pragma__\n");
 586
 587         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 588         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 589         // it is "long unsigned int".  In either case we can probably
 590         // get away with this.  We need the #ifndef as cgcc will define
 591         // the right __SIZE_TYPE__.
 592         add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 593         add_pre_buffer("#weak_define __STDC__ 1\n");
 594
 595         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 596         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 597         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 598         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 599         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 600         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 601         add_pre_buffer("#define __builtin_va_end(arg)\n");
 602         add_pre_buffer("#define __builtin_offsetof(type, name) ((__SIZE_TYPE__)&((type *)(0ul))->name)\n");
 603
 604         /* FIXME! We need to do these as special magic macros at expansion time! */
 605         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 606         add_pre_buffer("#define __DATE__ \"??? ?? ????\"\n");
 607         add_pre_buffer("#define __TIME__ \"??:??:??\"\n");
 608
 609         if (optimize)
 610                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 611         if (optimize_size)
 612                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 613 }
 614
 615 static struct symbol_list *sparse_tokenstream(struct token *token)
 616 {
 617         // Pre-process the stream
 618         token = preprocess(token);
 619
 620         if (preprocess_only) {
 621                 while (!eof_token(token)) {
 622                         int prec = 1;
 623                         struct token *next = token->next;
 624                         const char *separator = "";
 625                         if (next->pos.whitespace)
 626                                 separator = " ";
 627                         if (next->pos.newline) {
 628                                 separator = "\n\t\t\t\t\t";
 629                                 prec = next->pos.pos;
 630                                 if (prec > 4)
 631                                         prec = 4;
 632                         }
 633                         printf("%s%.*s", show_token(token), prec, separator);
 634                         token = next;
 635                 }
 636                 putchar('\n');
 637
 638                 return NULL;
 639         }
 640
 641         // Parse the resulting C code
 642         while (!eof_token(token))
 643                 token = external_declaration(token, &translation_unit_used_list);
 644         return translation_unit_used_list;
 645 }
 646
 647 static struct symbol_list *sparse_file(const char *filename)
 648 {
 649         int fd;
 650         struct token *token;
 651
 652         if (strcmp (filename, "-") == 0) {
 653                 fd = 0;
 654         } else {
 655                 fd = open(filename, O_RDONLY);
 656                 if (fd < 0)
 657                         die("No such file: %s", filename);
 658         }
 659
 660         // Tokenize the input stream
 661         token = tokenize(filename, fd, NULL, includepath);
 662         close(fd);
 663
 664         return sparse_tokenstream(token);
 665 }
 666
 667 /*
 668  * This handles the "-include" directive etc: we're in global
 669  * scope, and all types/macros etc will affect all the following
 670  * files.
 671  *
 672  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 673  * affect all subsequent files too, ie we can have non-local
 674  * behaviour between files!
 675  */
 676 static struct symbol_list *sparse_initial(void)
 677 {
 678         struct token *token;
 679         int i;
 680
 681         // Prepend any "include" file to the stream.
 682         // We're in global scope, it will affect all files!
 683         token = NULL;
 684         for (i = cmdline_include_nr - 1; i >= 0; i--)
 685                 token = tokenize(cmdline_include[i].filename, cmdline_include[i].fd,
 686                                  token, includepath);
 687
 688         // Prepend the initial built-in stream
 689         token = tokenize_buffer(pre_buffer, pre_buffer_size, token);
 690         return sparse_tokenstream(token);
 691 }
 692
 693 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 694 {
 695         char **args;
 696         struct symbol_list *list;
 697
 698         // Initialize symbol stream first, so that we can add defines etc
 699         init_symbols();
 700
 701         args = argv;
 702         for (;;) {
 703                 char *arg = *++args;
 704                 if (!arg)
 705                         break;
 706
 707                 if (arg[0] == '-' && arg[1]) {
 708                         args = handle_switch(arg+1, args);
 709                         continue;
 710                 }
 711                 add_ptr_list_notag(filelist, arg);
 712         }
 713         handle_switch_W_finalize();
 714         handle_switch_v_finalize();
 715
 716         list = NULL;
 717         if (!ptr_list_empty(filelist)) {
 718                 // Initialize type system
 719                 init_ctype();
 720
 721                 create_builtin_stream();
 722                 add_pre_buffer("#define __CHECKER__ 1\n");
 723                 if (!preprocess_only)
 724                         declare_builtin_functions();
 725
 726                 list = sparse_initial();
 727
 728                 /*
 729                  * Protect the initial token allocations, since
 730                  * they need to survive all the others
 731                  */
 732                 protect_token_alloc();
 733         }
 734         return list;
 735 }
 736
 737 struct symbol_list * __sparse(char *filename)
 738 {
 739         struct symbol_list *res;
 740
 741         /* Clear previous symbol list */
 742         translation_unit_used_list = NULL;
 743
 744         new_file_scope();
 745         res = sparse_file(filename);
 746
 747         /* Drop the tokens for this file after parsing */
 748         clear_token_alloc();
 749
 750         /* And return it */
 751         return res;
 752 }
 753
 754 struct symbol_list * sparse(char *filename)
 755 {
 756         struct symbol_list *res = __sparse(filename);
 757
 758         /* Evaluate the complete symbol list */
 759         evaluate_symbol_list(res);
 760
 761         return res;
 762 }