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