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 = 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 int Wold_initializer = 1;
 208 int Wnon_pointer_null = 1;
 209
 210 int dbg_entry = 0;
 211 int dbg_dead = 0;
 212
 213 int preprocess_only;
 214
 215 #define CMDLINE_INCLUDE 20
 216 int cmdline_include_nr = 0;
 217 struct cmdline_include cmdline_include[CMDLINE_INCLUDE];
 218
 219
 220 void add_pre_buffer(const char *fmt, ...)
 221 {
 222         va_list args;
 223         unsigned int size;
 224
 225         va_start(args, fmt);
 226         size = pre_buffer_size;
 227         size += vsnprintf(pre_buffer + size,
 228                 sizeof(pre_buffer) - size,
 229                 fmt, args);
 230         pre_buffer_size = size;
 231         va_end(args);
 232 }
 233
 234 static char **handle_switch_D(char *arg, char **next)
 235 {
 236         const char *name = arg + 1;
 237         const char *value = "1";
 238         for (;;) {
 239                 char c;
 240                 c = *++arg;
 241                 if (!c)
 242                         break;
 243                 if (isspace((unsigned char)c) || c == '=') {
 244                         *arg = '\0';
 245                         value = arg + 1;
 246                         break;
 247                 }
 248         }
 249         add_pre_buffer("#define %s %s\n", name, value);
 250         return next;
 251 }
 252
 253 static char **handle_switch_E(char *arg, char **next)
 254 {
 255         preprocess_only = 1;
 256         return next;
 257 }
 258
 259 static char **handle_switch_I(char *arg, char **next)
 260 {
 261         char *path = arg+1;
 262
 263         switch (arg[1]) {
 264         case '-':
 265                 add_pre_buffer("#split_include\n");
 266                 break;
 267
 268         case '\0':      /* Plain "-I" */
 269                 path = *++next;
 270                 if (!path)
 271                         die("missing argument for -I option");
 272                 /* Fall through */
 273         default:
 274                 add_pre_buffer("#add_include \"%s/\"\n", path);
 275         }
 276         return next;
 277 }
 278
 279 static void add_cmdline_include(char *filename)
 280 {
 281         int fd = open(filename, O_RDONLY);
 282         if (fd < 0) {
 283                 perror(filename);
 284                 return;
 285         }
 286         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 287                 die("too many include files for %s\n", filename);
 288         cmdline_include[cmdline_include_nr].filename = filename;
 289         cmdline_include[cmdline_include_nr].fd = fd;
 290         cmdline_include_nr++;
 291 }
 292
 293 static char **handle_switch_i(char *arg, char **next)
 294 {
 295         if (*next && !strcmp(arg, "include"))
 296                 add_cmdline_include(*++next);
 297         else if (*next && !strcmp(arg, "imacros"))
 298                 add_cmdline_include(*++next);
 299         else if (*next && !strcmp(arg, "isystem")) {
 300                 char *path = *++next;
 301                 if (!path)
 302                         die("missing argument for -isystem option");
 303                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 304         }
 305         return next;
 306 }
 307
 308 static char **handle_switch_M(char *arg, char **next)
 309 {
 310         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 311                 if (!*next)
 312                         die("missing argument for -%s option", arg);
 313                 return next + 1;
 314         }
 315         return next;
 316 }
 317
 318 static char **handle_switch_m(char *arg, char **next)
 319 {
 320         if (!strcmp(arg, "m64")) {
 321                 bits_in_long = 64;
 322                 max_int_alignment = 8;
 323                 bits_in_pointer = 64;
 324                 pointer_alignment = 8;
 325         }
 326         return next;
 327 }
 328
 329 static char **handle_switch_o(char *arg, char **next)
 330 {
 331         if (!strcmp (arg, "o") && *next)
 332                 return next + 1; // "-o foo"
 333         else
 334                 return next;     // "-ofoo" or (bogus) terminal "-o"
 335 }
 336
 337 static const struct warning {
 338         const char *name;
 339         int *flag;
 340 } warnings[] = {
 341         { "cast-to-as", &Wcast_to_address_space },
 342         { "decl", &Wdecl },
 343         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 344         { "cast-truncate", &Wcast_truncate },
 345         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 346         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 347         { "undef", &Wundefined_preprocessor },
 348         { "bitwise", &Wbitwise },
 349         { "typesign", &Wtypesign },
 350         { "context", &Wcontext },
 351         { "transparent-union", &Wtransparent_union },
 352         { "shadow", &Wshadow },
 353         { "address-space", &Waddress_space },
 354         { "enum-mismatch", &Wenum_mismatch },
 355         { "do-while", &Wdo_while },
 356         { "uninitialized", &Wuninitialized },
 357         { "old-initializer", &Wold_initializer },
 358         { "non-pointer-null", &Wnon_pointer_null },
 359 };
 360
 361 enum {
 362         WARNING_OFF,
 363         WARNING_ON,
 364         WARNING_FORCE_OFF
 365 };
 366
 367
 368 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 369 {
 370         int flag = WARNING_ON;
 371         char *p = arg + 1;
 372         unsigned i;
 373
 374         if (!strcmp(p, "all")) {
 375                 for (i = 0; i < n; i++) {
 376                         if (*warnings[i].flag != WARNING_FORCE_OFF)
 377                                 *warnings[i].flag = WARNING_ON;
 378                 }
 379         }
 380
 381         // Prefixes "no" and "no-" mean to turn warning off.
 382         if (p[0] == 'n' && p[1] == 'o') {
 383                 p += 2;
 384                 if (p[0] == '-')
 385                         p++;
 386                 flag = WARNING_FORCE_OFF;
 387         }
 388
 389         for (i = 0; i < n; i++) {
 390                 if (!strcmp(p,warnings[i].name)) {
 391                         *warnings[i].flag = flag;
 392                         return next;
 393                 }
 394         }
 395
 396         // Unknown.
 397         return NULL;
 398 }
 399
 400 static char **handle_switch_W(char *arg, char **next)
 401 {
 402         char ** ret = handle_onoff_switch(arg, next, warnings, sizeof warnings/sizeof warnings[0]);
 403         if (ret)
 404                 return ret;
 405
 406         // Unknown.
 407         return next;
 408 }
 409
 410 static struct warning debugs[] = {
 411         { "entry", &dbg_entry},
 412         { "dead", &dbg_dead},
 413 };
 414
 415
 416 static char **handle_switch_v(char *arg, char **next)
 417 {
 418         char ** ret = handle_onoff_switch(arg, next, debugs, sizeof debugs/sizeof debugs[0]);
 419         if (ret)
 420                 return ret;
 421
 422         // Unknown.
 423         do {
 424                 verbose++;
 425         } while (*++arg == 'v');
 426         return next;
 427 }
 428
 429
 430 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 431 {
 432         unsigned i;
 433
 434         for (i = 0; i < n; i++) {
 435                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 436                         *warnings[i].flag = WARNING_OFF;
 437         }
 438 }
 439
 440 static void handle_switch_W_finalize(void)
 441 {
 442         handle_onoff_switch_finalize(warnings, sizeof(warnings) / sizeof(warnings[0]));
 443 }
 444
 445 static void handle_switch_v_finalize(void)
 446 {
 447         handle_onoff_switch_finalize(debugs, sizeof(debugs) / sizeof(debugs[0]));
 448 }
 449
 450 static char **handle_switch_U(char *arg, char **next)
 451 {
 452         const char *name = arg + 1;
 453         add_pre_buffer ("#undef %s\n", name);
 454         return next;
 455 }
 456
 457 static char **handle_switch_O(char *arg, char **next)
 458 {
 459         int level = 1;
 460         if (arg[1] >= '0' && arg[1] <= '9')
 461                 level = arg[1] - '0';
 462         optimize = level;
 463         optimize_size = arg[1] == 's';
 464         return next;
 465 }
 466
 467 static char **handle_switch_f(char *arg, char **next)
 468 {
 469         int flag = 1;
 470
 471         arg++;
 472         if (!strncmp(arg, "no-", 3)) {
 473                 flag = 0;
 474                 arg += 3;
 475         }
 476         /* handle switch here.. */
 477         return next;
 478 }
 479
 480 static char **handle_switch_G(char *arg, char **next)
 481 {
 482         if (!strcmp (arg, "G") && *next)
 483                 return next + 1; // "-G 0"
 484         else
 485                 return next;     // "-G0" or (bogus) terminal "-G"
 486 }
 487
 488 static char **handle_nostdinc(char *arg, char **next)
 489 {
 490         add_pre_buffer("#nostdinc\n");
 491         return next;
 492 }
 493
 494 static char **handle_dirafter(char *arg, char **next)
 495 {
 496         char *path = *++next;
 497         if (!path)
 498                 die("missing argument for -dirafter option");
 499         add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 500         return next;
 501 }
 502
 503 struct switches {
 504         const char *name;
 505         char **(*fn)(char *, char **);
 506 };
 507
 508 char **handle_switch(char *arg, char **next)
 509 {
 510         static struct switches cmd[] = {
 511                 { "nostdinc", handle_nostdinc },
 512                 { "dirafter", handle_dirafter },
 513                 { NULL, NULL }
 514         };
 515         struct switches *s;
 516
 517         switch (*arg) {
 518         case 'D': return handle_switch_D(arg, next);
 519         case 'E': return handle_switch_E(arg, next);
 520         case 'I': return handle_switch_I(arg, next);
 521         case 'i': return handle_switch_i(arg, next);
 522         case 'M': return handle_switch_M(arg, next);
 523         case 'm': return handle_switch_m(arg, next);
 524         case 'o': return handle_switch_o(arg, next);
 525         case 'U': return handle_switch_U(arg, next);
 526         case 'v': return handle_switch_v(arg, next);
 527         case 'W': return handle_switch_W(arg, next);
 528         case 'O': return handle_switch_O(arg, next);
 529         case 'f': return handle_switch_f(arg, next);
 530         case 'G': return handle_switch_G(arg, next);
 531         default:
 532                 break;
 533         }
 534
 535         s = cmd;
 536         while (s->name) {
 537                 if (!strcmp(s->name, arg))
 538                         return s->fn(arg, next);
 539                 s++;
 540         }
 541
 542         /*
 543          * Ignore unknown command line options:
 544          * they're probably gcc switches
 545          */
 546         return next;
 547 }
 548
 549 void declare_builtin_functions(void)
 550 {
 551         /* Gaah. gcc knows tons of builtin <string.h> functions */
 552         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 553         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 554         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 555         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 556         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 557         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 558         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 559         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 560         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 561         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 562
 563         /* And some random ones.. */
 564         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 565         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 566         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 567         add_pre_buffer("extern void __builtin_trap(void);\n");
 568         add_pre_buffer("extern int __builtin_ffs(int);\n");
 569         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 570         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 571         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 572         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 573         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 574         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 575         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 576         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 577         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 578         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 579         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 580 }
 581
 582 void create_builtin_stream(void)
 583 {
 584         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 585         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 586         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 587         add_pre_buffer("#define __extension__\n");
 588         add_pre_buffer("#define __pragma__\n");
 589
 590         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 591         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 592         // it is "long unsigned int".  In either case we can probably
 593         // get away with this.  We need the #weak_define as cgcc will define
 594         // the right __SIZE_TYPE__.
 595         add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 596         add_pre_buffer("#weak_define __STDC__ 1\n");
 597
 598         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 599         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 600         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 601         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 602         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 603         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 604         add_pre_buffer("#define __builtin_va_end(arg)\n");
 605         add_pre_buffer("#define __builtin_offsetof(type, name) ((__SIZE_TYPE__)&((type *)(0ul))->name)\n");
 606
 607         /* FIXME! We need to do these as special magic macros at expansion time! */
 608         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 609
 610         if (optimize)
 611                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 612         if (optimize_size)
 613                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 614 }
 615
 616 static struct symbol_list *sparse_tokenstream(struct token *token)
 617 {
 618         // Preprocess the stream
 619         token = preprocess(token);
 620
 621         if (preprocess_only) {
 622                 while (!eof_token(token)) {
 623                         int prec = 1;
 624                         struct token *next = token->next;
 625                         const char *separator = "";
 626                         if (next->pos.whitespace)
 627                                 separator = " ";
 628                         if (next->pos.newline) {
 629                                 separator = "\n\t\t\t\t\t";
 630                                 prec = next->pos.pos;
 631                                 if (prec > 4)
 632                                         prec = 4;
 633                         }
 634                         printf("%s%.*s", show_token(token), prec, separator);
 635                         token = next;
 636                 }
 637                 putchar('\n');
 638
 639                 return NULL;
 640         }
 641
 642         // Parse the resulting C code
 643         while (!eof_token(token))
 644                 token = external_declaration(token, &translation_unit_used_list);
 645         return translation_unit_used_list;
 646 }
 647
 648 static struct symbol_list *sparse_file(const char *filename)
 649 {
 650         int fd;
 651         struct token *token;
 652
 653         if (strcmp (filename, "-") == 0) {
 654                 fd = 0;
 655         } else {
 656                 fd = open(filename, O_RDONLY);
 657                 if (fd < 0)
 658                         die("No such file: %s", filename);
 659         }
 660
 661         // Tokenize the input stream
 662         token = tokenize(filename, fd, NULL, includepath);
 663         close(fd);
 664
 665         return sparse_tokenstream(token);
 666 }
 667
 668 /*
 669  * This handles the "-include" directive etc: we're in global
 670  * scope, and all types/macros etc will affect all the following
 671  * files.
 672  *
 673  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 674  * affect all subsequent files too, i.e. we can have non-local
 675  * behaviour between files!
 676  */
 677 static struct symbol_list *sparse_initial(void)
 678 {
 679         struct token *token;
 680         int i;
 681
 682         // Prepend any "include" file to the stream.
 683         // We're in global scope, it will affect all files!
 684         token = NULL;
 685         for (i = cmdline_include_nr - 1; i >= 0; i--)
 686                 token = tokenize(cmdline_include[i].filename, cmdline_include[i].fd,
 687                                  token, includepath);
 688
 689         // Prepend the initial built-in stream
 690         token = tokenize_buffer(pre_buffer, pre_buffer_size, token);
 691         return sparse_tokenstream(token);
 692 }
 693
 694 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 695 {
 696         char **args;
 697         struct symbol_list *list;
 698
 699         // Initialize symbol stream first, so that we can add defines etc
 700         init_symbols();
 701
 702         args = argv;
 703         for (;;) {
 704                 char *arg = *++args;
 705                 if (!arg)
 706                         break;
 707
 708                 if (arg[0] == '-' && arg[1]) {
 709                         args = handle_switch(arg+1, args);
 710                         continue;
 711                 }
 712                 add_ptr_list_notag(filelist, arg);
 713         }
 714         handle_switch_W_finalize();
 715         handle_switch_v_finalize();
 716
 717         list = NULL;
 718         if (!ptr_list_empty(filelist)) {
 719                 // Initialize type system
 720                 init_ctype();
 721
 722                 create_builtin_stream();
 723                 add_pre_buffer("#define __CHECKER__ 1\n");
 724                 if (!preprocess_only)
 725                         declare_builtin_functions();
 726
 727                 list = sparse_initial();
 728
 729                 /*
 730                  * Protect the initial token allocations, since
 731                  * they need to survive all the others
 732                  */
 733                 protect_token_alloc();
 734         }
 735         return list;
 736 }
 737
 738 struct symbol_list * __sparse(char *filename)
 739 {
 740         struct symbol_list *res;
 741
 742         /* Clear previous symbol list */
 743         translation_unit_used_list = NULL;
 744
 745         new_file_scope();
 746         res = sparse_file(filename);
 747
 748         /* Drop the tokens for this file after parsing */
 749         clear_token_alloc();
 750
 751         /* And return it */
 752         return res;
 753 }
 754
 755 struct symbol_list * sparse(char *filename)
 756 {
 757         struct symbol_list *res = __sparse(filename);
 758
 759         /* Evaluate the complete symbol list */
 760         evaluate_symbol_list(res);
 761
 762         return res;
 763 }