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 static const char *gcc_base_dir = GCC_BASE;
  45
  46 struct token *skip_to(struct token *token, int op)
  47 {
  48         while (!match_op(token, op) && !eof_token(token))
  49                 token = token->next;
  50         return token;
  51 }
  52
  53 struct token *expect(struct token *token, int op, const char *where)
  54 {
  55         if (!match_op(token, op)) {
  56                 static struct token bad_token;
  57                 if (token != &bad_token) {
  58                         bad_token.next = token;
  59                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  60                         sparse_error(token->pos, "got %s", show_token(token));
  61                 }
  62                 if (op == ';')
  63                         return skip_to(token, op);
  64                 return &bad_token;
  65         }
  66         return token->next;
  67 }
  68
  69 unsigned int hexval(unsigned int c)
  70 {
  71         int retval = 256;
  72         switch (c) {
  73         case '0'...'9':
  74                 retval = c - '0';
  75                 break;
  76         case 'a'...'f':
  77                 retval = c - 'a' + 10;
  78                 break;
  79         case 'A'...'F':
  80                 retval = c - 'A' + 10;
  81                 break;
  82         }
  83         return retval;
  84 }
  85
  86 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
  87 {
  88         static char buffer[512];
  89         const char *name;
  90
  91         vsprintf(buffer, fmt, args);
  92         name = stream_name(pos.stream);
  93
  94         fprintf(stderr, "%s:%d:%d: %s%s\n",
  95                 name, pos.line, pos.pos, type, buffer);
  96 }
  97
  98 static int max_warnings = 100;
  99 static int show_info = 1;
 100
 101 void info(struct position pos, const char * fmt, ...)
 102 {
 103         va_list args;
 104
 105         if (!show_info)
 106                 return;
 107         va_start(args, fmt);
 108         do_warn("", pos, fmt, args);
 109         va_end(args);
 110 }
 111
 112 void warning(struct position pos, const char * fmt, ...)
 113 {
 114         va_list args;
 115
 116         if (!max_warnings) {
 117                 show_info = 0;
 118                 return;
 119         }
 120
 121         if (!--max_warnings) {
 122                 show_info = 0;
 123                 fmt = "too many warnings";
 124         }
 125
 126         va_start(args, fmt);
 127         do_warn("warning: ", pos, fmt, args);
 128         va_end(args);
 129 }
 130
 131 static void do_error(struct position pos, const char * fmt, va_list args)
 132 {
 133         static int errors = 0;
 134         die_if_error = 1;
 135         show_info = 1;
 136         /* Shut up warnings after an error */
 137         max_warnings = 0;
 138         if (errors > 100) {
 139                 static int once = 0;
 140                 show_info = 0;
 141                 if (once)
 142                         return;
 143                 fmt = "too many errors";
 144                 once = 1;
 145         }
 146
 147         do_warn("error: ", pos, fmt, args);
 148         errors++;
 149 }
 150
 151 void sparse_error(struct position pos, const char * fmt, ...)
 152 {
 153         va_list args;
 154         va_start(args, fmt);
 155         do_error(pos, fmt, args);
 156         va_end(args);
 157 }
 158
 159 void expression_error(struct expression *expr, const char *fmt, ...)
 160 {
 161         va_list args;
 162         va_start(args, fmt);
 163         do_error(expr->pos, fmt, args);
 164         va_end(args);
 165         expr->ctype = &bad_ctype;
 166 }
 167
 168 void error_die(struct position pos, const char * fmt, ...)
 169 {
 170         va_list args;
 171         va_start(args, fmt);
 172         do_warn("error: ", pos, fmt, args);
 173         va_end(args);
 174         exit(1);
 175 }
 176
 177 void die(const char *fmt, ...)
 178 {
 179         va_list args;
 180         static char buffer[512];
 181
 182         va_start(args, fmt);
 183         vsnprintf(buffer, sizeof(buffer), fmt, args);
 184         va_end(args);
 185
 186         fprintf(stderr, "%s\n", buffer);
 187         exit(1);
 188 }
 189
 190 static struct token *pre_buffer_begin = NULL;
 191 static struct token *pre_buffer_end = NULL;
 192
 193 int Waddress_space = 1;
 194 int Wbitwise = 0;
 195 int Wcast_to_as = 0;
 196 int Wcast_truncate = 1;
 197 int Wcontext = 1;
 198 int Wdecl = 1;
 199 int Wdefault_bitfield_sign = 0;
 200 int Wdesignated_init = 1;
 201 int Wdo_while = 0;
 202 int Wenum_mismatch = 1;
 203 int Wnon_pointer_null = 1;
 204 int Wold_initializer = 1;
 205 int Wone_bit_signed_bitfield = 1;
 206 int Wparen_string = 0;
 207 int Wptr_subtraction_blows = 0;
 208 int Wreturn_void = 0;
 209 int Wshadow = 0;
 210 int Wtransparent_union = 0;
 211 int Wtypesign = 0;
 212 int Wundef = 0;
 213 int Wuninitialized = 1;
 214 int Wdeclarationafterstatement = -1;
 215
 216 int dbg_entry = 0;
 217 int dbg_dead = 0;
 218
 219 int preprocess_only;
 220
 221 static enum { STANDARD_C89,
 222               STANDARD_C94,
 223               STANDARD_C99,
 224               STANDARD_GNU89,
 225               STANDARD_GNU99, } standard = STANDARD_GNU89;
 226
 227 #define CMDLINE_INCLUDE 20
 228 int cmdline_include_nr = 0;
 229 struct cmdline_include cmdline_include[CMDLINE_INCLUDE];
 230
 231
 232 void add_pre_buffer(const char *fmt, ...)
 233 {
 234         va_list args;
 235         unsigned int size;
 236         struct token *begin, *end;
 237         char buffer[4096];
 238
 239         va_start(args, fmt);
 240         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 241         va_end(args);
 242         begin = tokenize_buffer(buffer, size, &end);
 243         if (!pre_buffer_begin)
 244                 pre_buffer_begin = begin;
 245         if (pre_buffer_end)
 246                 pre_buffer_end->next = begin;
 247         pre_buffer_end = end;
 248 }
 249
 250 static char **handle_switch_D(char *arg, char **next)
 251 {
 252         const char *name = arg + 1;
 253         const char *value = "1";
 254
 255         if (!*name || isspace(*name))
 256                 die("argument to `-D' is missing");
 257
 258         for (;;) {
 259                 char c;
 260                 c = *++arg;
 261                 if (!c)
 262                         break;
 263                 if (isspace((unsigned char)c) || c == '=') {
 264                         *arg = '\0';
 265                         value = arg + 1;
 266                         break;
 267                 }
 268         }
 269         add_pre_buffer("#define %s %s\n", name, value);
 270         return next;
 271 }
 272
 273 static char **handle_switch_E(char *arg, char **next)
 274 {
 275         if (arg[1] == '\0')
 276                 preprocess_only = 1;
 277         return next;
 278 }
 279
 280 static char **handle_switch_I(char *arg, char **next)
 281 {
 282         char *path = arg+1;
 283
 284         switch (arg[1]) {
 285         case '-':
 286                 add_pre_buffer("#split_include\n");
 287                 break;
 288
 289         case '\0':      /* Plain "-I" */
 290                 path = *++next;
 291                 if (!path)
 292                         die("missing argument for -I option");
 293                 /* Fall through */
 294         default:
 295                 add_pre_buffer("#add_include \"%s/\"\n", path);
 296         }
 297         return next;
 298 }
 299
 300 static void add_cmdline_include(char *filename)
 301 {
 302         int fd = open(filename, O_RDONLY);
 303         if (fd < 0) {
 304                 perror(filename);
 305                 return;
 306         }
 307         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 308                 die("too many include files for %s\n", filename);
 309         cmdline_include[cmdline_include_nr].filename = filename;
 310         cmdline_include[cmdline_include_nr].fd = fd;
 311         cmdline_include_nr++;
 312 }
 313
 314 static char **handle_switch_i(char *arg, char **next)
 315 {
 316         if (*next && !strcmp(arg, "include"))
 317                 add_cmdline_include(*++next);
 318         else if (*next && !strcmp(arg, "imacros"))
 319                 add_cmdline_include(*++next);
 320         else if (*next && !strcmp(arg, "isystem")) {
 321                 char *path = *++next;
 322                 if (!path)
 323                         die("missing argument for -isystem option");
 324                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 325         } else if (*next && !strcmp(arg, "idirafter")) {
 326                 char *path = *++next;
 327                 if (!path)
 328                         die("missing argument for -idirafter option");
 329                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 330         }
 331         return next;
 332 }
 333
 334 static char **handle_switch_M(char *arg, char **next)
 335 {
 336         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 337                 if (!*next)
 338                         die("missing argument for -%s option", arg);
 339                 return next + 1;
 340         }
 341         return next;
 342 }
 343
 344 static char **handle_switch_m(char *arg, char **next)
 345 {
 346         if (!strcmp(arg, "m64")) {
 347                 bits_in_long = 64;
 348                 max_int_alignment = 8;
 349                 bits_in_pointer = 64;
 350                 pointer_alignment = 8;
 351                 size_t_ctype = &ulong_ctype;
 352                 ssize_t_ctype = &long_ctype;
 353         } else if (!strcmp(arg, "msize-long")) {
 354                 size_t_ctype = &ulong_ctype;
 355                 ssize_t_ctype = &long_ctype;
 356         }
 357         return next;
 358 }
 359
 360 static char **handle_switch_o(char *arg, char **next)
 361 {
 362         if (!strcmp (arg, "o")) {       // "-o foo"
 363                 if (!*++next)
 364                         die("argument to '-o' is missing");
 365         }
 366         // else "-ofoo"
 367
 368         return next;
 369 }
 370
 371 static const struct warning {
 372         const char *name;
 373         int *flag;
 374 } warnings[] = {
 375         { "address-space", &Waddress_space },
 376         { "bitwise", &Wbitwise },
 377         { "cast-to-as", &Wcast_to_as },
 378         { "cast-truncate", &Wcast_truncate },
 379         { "context", &Wcontext },
 380         { "decl", &Wdecl },
 381         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 382         { "designated-init", &Wdesignated_init },
 383         { "do-while", &Wdo_while },
 384         { "enum-mismatch", &Wenum_mismatch },
 385         { "non-pointer-null", &Wnon_pointer_null },
 386         { "old-initializer", &Wold_initializer },
 387         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 388         { "paren-string", &Wparen_string },
 389         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 390         { "return-void", &Wreturn_void },
 391         { "shadow", &Wshadow },
 392         { "transparent-union", &Wtransparent_union },
 393         { "typesign", &Wtypesign },
 394         { "undef", &Wundef },
 395         { "uninitialized", &Wuninitialized },
 396         { "declaration-after-statement", &Wdeclarationafterstatement },
 397 };
 398
 399 enum {
 400         WARNING_OFF,
 401         WARNING_ON,
 402         WARNING_FORCE_OFF
 403 };
 404
 405
 406 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 407 {
 408         int flag = WARNING_ON;
 409         char *p = arg + 1;
 410         unsigned i;
 411
 412         if (!strcmp(p, "sparse-all")) {
 413                 for (i = 0; i < n; i++) {
 414                         if (*warnings[i].flag != WARNING_FORCE_OFF)
 415                                 *warnings[i].flag = WARNING_ON;
 416                 }
 417         }
 418
 419         // Prefixes "no" and "no-" mean to turn warning off.
 420         if (p[0] == 'n' && p[1] == 'o') {
 421                 p += 2;
 422                 if (p[0] == '-')
 423                         p++;
 424                 flag = WARNING_FORCE_OFF;
 425         }
 426
 427         for (i = 0; i < n; i++) {
 428                 if (!strcmp(p,warnings[i].name)) {
 429                         *warnings[i].flag = flag;
 430                         return next;
 431                 }
 432         }
 433
 434         // Unknown.
 435         return NULL;
 436 }
 437
 438 static char **handle_switch_W(char *arg, char **next)
 439 {
 440         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 441         if (ret)
 442                 return ret;
 443
 444         // Unknown.
 445         return next;
 446 }
 447
 448 static struct warning debugs[] = {
 449         { "entry", &dbg_entry},
 450         { "dead", &dbg_dead},
 451 };
 452
 453
 454 static char **handle_switch_v(char *arg, char **next)
 455 {
 456         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 457         if (ret)
 458                 return ret;
 459
 460         // Unknown.
 461         do {
 462                 verbose++;
 463         } while (*++arg == 'v');
 464         return next;
 465 }
 466
 467
 468 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 469 {
 470         unsigned i;
 471
 472         for (i = 0; i < n; i++) {
 473                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 474                         *warnings[i].flag = WARNING_OFF;
 475         }
 476 }
 477
 478 static void handle_switch_W_finalize(void)
 479 {
 480         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 481
 482         /* default Wdeclarationafterstatement based on the C dialect */
 483         if (-1 == Wdeclarationafterstatement)
 484         {
 485                 switch (standard)
 486                 {
 487                         case STANDARD_C89:
 488                         case STANDARD_C94:
 489                                 Wdeclarationafterstatement = 1;
 490                                 break;
 491
 492                         case STANDARD_C99:
 493                         case STANDARD_GNU89:
 494                         case STANDARD_GNU99:
 495                                 Wdeclarationafterstatement = 0;
 496                                 break;
 497
 498                         default:
 499                                 assert (0);
 500                 }
 501
 502         }
 503 }
 504
 505 static void handle_switch_v_finalize(void)
 506 {
 507         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 508 }
 509
 510 static char **handle_switch_U(char *arg, char **next)
 511 {
 512         const char *name = arg + 1;
 513         add_pre_buffer ("#undef %s\n", name);
 514         return next;
 515 }
 516
 517 static char **handle_switch_O(char *arg, char **next)
 518 {
 519         int level = 1;
 520         if (arg[1] >= '0' && arg[1] <= '9')
 521                 level = arg[1] - '0';
 522         optimize = level;
 523         optimize_size = arg[1] == 's';
 524         return next;
 525 }
 526
 527 static char **handle_switch_ftabstop(char *arg, char **next)
 528 {
 529         char *end;
 530         unsigned long val;
 531
 532         if (*arg == '\0')
 533                 die("error: missing argument to \"-ftabstop=\"");
 534
 535         /* we silently ignore silly values */
 536         val = strtoul(arg, &end, 10);
 537         if (*end == '\0' && 1 <= val && val <= 100)
 538                 tabstop = val;
 539
 540         return next;
 541 }
 542
 543 static char **handle_switch_f(char *arg, char **next)
 544 {
 545         arg++;
 546
 547         if (!strncmp(arg, "tabstop=", 8))
 548                 return handle_switch_ftabstop(arg+8, next);
 549
 550         /* handle switches w/ arguments above, boolean and only boolean below */
 551
 552         if (!strncmp(arg, "no-", 3)) {
 553                 arg += 3;
 554         }
 555         /* handle switch here.. */
 556         return next;
 557 }
 558
 559 static char **handle_switch_G(char *arg, char **next)
 560 {
 561         if (!strcmp (arg, "G") && *next)
 562                 return next + 1; // "-G 0"
 563         else
 564                 return next;     // "-G0" or (bogus) terminal "-G"
 565 }
 566
 567 static char **handle_switch_a(char *arg, char **next)
 568 {
 569         if (!strcmp (arg, "ansi"))
 570                 standard = STANDARD_C89;
 571
 572         return next;
 573 }
 574
 575 static char **handle_switch_s(char *arg, char **next)
 576 {
 577         if (!strncmp (arg, "std=", 4))
 578         {
 579                 arg += 4;
 580
 581                 if (!strcmp (arg, "c89") ||
 582                     !strcmp (arg, "iso9899:1990"))
 583                         standard = STANDARD_C89;
 584
 585                 else if (!strcmp (arg, "iso9899:199409"))
 586                         standard = STANDARD_C94;
 587
 588                 else if (!strcmp (arg, "c99") ||
 589                          !strcmp (arg, "c9x") ||
 590                          !strcmp (arg, "iso9899:1999") ||
 591                          !strcmp (arg, "iso9899:199x"))
 592                         standard = STANDARD_C99;
 593
 594                 else if (!strcmp (arg, "gnu89"))
 595                         standard = STANDARD_GNU89;
 596
 597                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 598                         standard = STANDARD_GNU99;
 599
 600                 else
 601                         die ("Unsupported C dialect");
 602         }
 603
 604         return next;
 605 }
 606
 607 static char **handle_nostdinc(char *arg, char **next)
 608 {
 609         add_pre_buffer("#nostdinc\n");
 610         return next;
 611 }
 612
 613 static char **handle_base_dir(char *arg, char **next)
 614 {
 615         gcc_base_dir = *++next;
 616         if (!gcc_base_dir)
 617                 die("missing argument for -gcc-base-dir option");
 618         return next;
 619 }
 620
 621 struct switches {
 622         const char *name;
 623         char **(*fn)(char *, char **);
 624 };
 625
 626 static char **handle_switch(char *arg, char **next)
 627 {
 628         static struct switches cmd[] = {
 629                 { "nostdinc", handle_nostdinc },
 630                 { "gcc-base-dir", handle_base_dir},
 631                 { NULL, NULL }
 632         };
 633         struct switches *s;
 634
 635         switch (*arg) {
 636         case 'D': return handle_switch_D(arg, next);
 637         case 'E': return handle_switch_E(arg, next);
 638         case 'I': return handle_switch_I(arg, next);
 639         case 'i': return handle_switch_i(arg, next);
 640         case 'M': return handle_switch_M(arg, next);
 641         case 'm': return handle_switch_m(arg, next);
 642         case 'o': return handle_switch_o(arg, next);
 643         case 'U': return handle_switch_U(arg, next);
 644         case 'v': return handle_switch_v(arg, next);
 645         case 'W': return handle_switch_W(arg, next);
 646         case 'O': return handle_switch_O(arg, next);
 647         case 'f': return handle_switch_f(arg, next);
 648         case 'G': return handle_switch_G(arg, next);
 649         case 'a': return handle_switch_a(arg, next);
 650         case 's': return handle_switch_s(arg, next);
 651         default:
 652                 break;
 653         }
 654
 655         s = cmd;
 656         while (s->name) {
 657                 if (!strcmp(s->name, arg))
 658                         return s->fn(arg, next);
 659                 s++;
 660         }
 661
 662         /*
 663          * Ignore unknown command line options:
 664          * they're probably gcc switches
 665          */
 666         return next;
 667 }
 668
 669 void declare_builtin_functions(void)
 670 {
 671         /* Gaah. gcc knows tons of builtin <string.h> functions */
 672         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 673         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 674         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 675         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 676         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 677         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 678         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 679         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 680         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 681         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 682         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 683         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 684         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 685         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 686
 687         /* And bitwise operations.. */
 688         add_pre_buffer("extern int __builtin_clz(int);\n");
 689         add_pre_buffer("extern int __builtin_clzl(long);\n");
 690         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 691         add_pre_buffer("extern int __builtin_ctz(int);\n");
 692         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 693         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 694         add_pre_buffer("extern int __builtin_ffs(int);\n");
 695         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 696         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 697         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 698         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 699         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 700
 701         /* And some random ones.. */
 702         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 703         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 704         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 705         add_pre_buffer("extern void __builtin_trap(void);\n");
 706         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 707         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 708         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 709         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 710         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 711         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 712         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 713         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 714         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 715         add_pre_buffer("extern long __builtin_labs(long);\n");
 716         add_pre_buffer("extern double __builtin_fabs(double);\n");
 717
 718         /* Add Blackfin-specific stuff */
 719         add_pre_buffer(
 720                 "#ifdef __bfin__\n"
 721                 "extern void __builtin_bfin_csync(void);\n"
 722                 "extern void __builtin_bfin_ssync(void);\n"
 723                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
 724                 "#endif\n"
 725         );
 726
 727         /* And some floating point stuff.. */
 728         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 729         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 730         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 731         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 732         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 733         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 734
 735         /* And some __FORTIFY_SOURCE ones.. */
 736         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(void *, int);\n");
 737         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 738         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 739         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 740         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 741         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 742         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 743         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 744         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 745         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 746         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 747         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 748         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 749         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 750         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
 751 }
 752
 753 void create_builtin_stream(void)
 754 {
 755         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 756         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 757         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 758
 759         /* We add compiler headers path here because we have to parse
 760          * the arguments to get it, falling back to default. */
 761         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
 762         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
 763
 764         add_pre_buffer("#define __extension__\n");
 765         add_pre_buffer("#define __pragma__\n");
 766
 767         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 768         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 769         // it is "long unsigned int".  In either case we can probably
 770         // get away with this.  We need the #weak_define as cgcc will define
 771         // the right __SIZE_TYPE__.
 772         if (size_t_ctype == &ulong_ctype)
 773                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 774         else
 775                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
 776         add_pre_buffer("#weak_define __STDC__ 1\n");
 777
 778         switch (standard)
 779         {
 780                 case STANDARD_C89:
 781                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 782                         break;
 783
 784                 case STANDARD_C94:
 785                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
 786                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 787                         break;
 788
 789                 case STANDARD_C99:
 790                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 791                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 792                         break;
 793
 794                 case STANDARD_GNU89:
 795                         break;
 796
 797                 case STANDARD_GNU99:
 798                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 799                         break;
 800
 801                 default:
 802                         assert (0);
 803         }
 804
 805         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 806         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 807         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
 808         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 809         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 810         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 811         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 812         add_pre_buffer("#define __builtin_va_end(arg)\n");
 813         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 814
 815         /* FIXME! We need to do these as special magic macros at expansion time! */
 816         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 817
 818         if (optimize)
 819                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 820         if (optimize_size)
 821                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 822
 823         /* GCC defines these for limits.h */
 824         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
 825         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
 826         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
 827         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
 828         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
 829         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
 830 }
 831
 832 static struct symbol_list *sparse_tokenstream(struct token *token)
 833 {
 834         // Preprocess the stream
 835         token = preprocess(token);
 836
 837         if (preprocess_only) {
 838                 while (!eof_token(token)) {
 839                         int prec = 1;
 840                         struct token *next = token->next;
 841                         const char *separator = "";
 842                         if (next->pos.whitespace)
 843                                 separator = " ";
 844                         if (next->pos.newline) {
 845                                 separator = "\n\t\t\t\t\t";
 846                                 prec = next->pos.pos;
 847                                 if (prec > 4)
 848                                         prec = 4;
 849                         }
 850                         printf("%s%.*s", show_token(token), prec, separator);
 851                         token = next;
 852                 }
 853                 putchar('\n');
 854
 855                 return NULL;
 856         }
 857
 858         // Parse the resulting C code
 859         while (!eof_token(token))
 860                 token = external_declaration(token, &translation_unit_used_list);
 861         return translation_unit_used_list;
 862 }
 863
 864 static struct symbol_list *sparse_file(const char *filename)
 865 {
 866         int fd;
 867         struct token *token;
 868
 869         if (strcmp (filename, "-") == 0) {
 870                 fd = 0;
 871         } else {
 872                 fd = open(filename, O_RDONLY);
 873                 if (fd < 0)
 874                         die("No such file: %s", filename);
 875         }
 876
 877         // Tokenize the input stream
 878         token = tokenize(filename, fd, NULL, includepath);
 879         close(fd);
 880
 881         return sparse_tokenstream(token);
 882 }
 883
 884 /*
 885  * This handles the "-include" directive etc: we're in global
 886  * scope, and all types/macros etc will affect all the following
 887  * files.
 888  *
 889  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 890  * affect all subsequent files too, i.e. we can have non-local
 891  * behaviour between files!
 892  */
 893 static struct symbol_list *sparse_initial(void)
 894 {
 895         struct token *token;
 896         int i;
 897
 898         // Prepend any "include" file to the stream.
 899         // We're in global scope, it will affect all files!
 900         token = NULL;
 901         for (i = cmdline_include_nr - 1; i >= 0; i--)
 902                 token = tokenize(cmdline_include[i].filename, cmdline_include[i].fd,
 903                                  token, includepath);
 904
 905         // Prepend the initial built-in stream
 906         if (token)
 907                 pre_buffer_end->next = token;
 908         return sparse_tokenstream(pre_buffer_begin);
 909 }
 910
 911 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 912 {
 913         char **args;
 914         struct symbol_list *list;
 915
 916         // Initialize symbol stream first, so that we can add defines etc
 917         init_symbols();
 918
 919         args = argv;
 920         for (;;) {
 921                 char *arg = *++args;
 922                 if (!arg)
 923                         break;
 924
 925                 if (arg[0] == '-' && arg[1]) {
 926                         args = handle_switch(arg+1, args);
 927                         continue;
 928                 }
 929                 add_ptr_list_notag(filelist, arg);
 930         }
 931         handle_switch_W_finalize();
 932         handle_switch_v_finalize();
 933
 934         list = NULL;
 935         if (!ptr_list_empty(filelist)) {
 936                 // Initialize type system
 937                 init_ctype();
 938
 939                 create_builtin_stream();
 940                 add_pre_buffer("#define __CHECKER__ 1\n");
 941                 if (!preprocess_only)
 942                         declare_builtin_functions();
 943
 944                 list = sparse_initial();
 945
 946                 /*
 947                  * Protect the initial token allocations, since
 948                  * they need to survive all the others
 949                  */
 950                 protect_token_alloc();
 951         }
 952         return list;
 953 }
 954
 955 struct symbol_list * sparse_keep_tokens(char *filename)
 956 {
 957         struct symbol_list *res;
 958
 959         /* Clear previous symbol list */
 960         translation_unit_used_list = NULL;
 961
 962         new_file_scope();
 963         res = sparse_file(filename);
 964
 965         /* And return it */
 966         return res;
 967 }
 968
 969
 970 struct symbol_list * __sparse(char *filename)
 971 {
 972         struct symbol_list *res;
 973
 974         res = sparse_keep_tokens(filename);
 975
 976         /* Drop the tokens for this file after parsing */
 977         clear_token_alloc();
 978
 979         /* And return it */
 980         return res;
 981 }
 982
 983 struct symbol_list * sparse(char *filename)
 984 {
 985         struct symbol_list *res = __sparse(filename);
 986
 987         /* Evaluate the complete symbol list */
 988         evaluate_symbol_list(res);
 989
 990         return res;
 991 }