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, sizeof warnings/sizeof warnings[0]);
 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, sizeof debugs/sizeof debugs[0]);
 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, sizeof(warnings) / sizeof(warnings[0]));
 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, sizeof(debugs) / sizeof(debugs[0]));
 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         int flag = 1;
 546
 547         arg++;
 548
 549         if (!strncmp(arg, "tabstop=", 8))
 550                 return handle_switch_ftabstop(arg+8, next);
 551
 552         /* handle switches w/ arguments above, boolean and only boolean below */
 553
 554         if (!strncmp(arg, "no-", 3)) {
 555                 flag = 0;
 556                 arg += 3;
 557         }
 558         /* handle switch here.. */
 559         return next;
 560 }
 561
 562 static char **handle_switch_G(char *arg, char **next)
 563 {
 564         if (!strcmp (arg, "G") && *next)
 565                 return next + 1; // "-G 0"
 566         else
 567                 return next;     // "-G0" or (bogus) terminal "-G"
 568 }
 569
 570 static char **handle_switch_a(char *arg, char **next)
 571 {
 572         if (!strcmp (arg, "ansi"))
 573                 standard = STANDARD_C89;
 574
 575         return next;
 576 }
 577
 578 static char **handle_switch_s(char *arg, char **next)
 579 {
 580         if (!strncmp (arg, "std=", 4))
 581         {
 582                 arg += 4;
 583
 584                 if (!strcmp (arg, "c89") ||
 585                     !strcmp (arg, "iso9899:1990"))
 586                         standard = STANDARD_C89;
 587
 588                 else if (!strcmp (arg, "iso9899:199409"))
 589                         standard = STANDARD_C94;
 590
 591                 else if (!strcmp (arg, "c99") ||
 592                          !strcmp (arg, "c9x") ||
 593                          !strcmp (arg, "iso9899:1999") ||
 594                          !strcmp (arg, "iso9899:199x"))
 595                         standard = STANDARD_C99;
 596
 597                 else if (!strcmp (arg, "gnu89"))
 598                         standard = STANDARD_GNU89;
 599
 600                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 601                         standard = STANDARD_GNU99;
 602
 603                 else
 604                         die ("Unsupported C dialect");
 605         }
 606
 607         return next;
 608 }
 609
 610 static char **handle_nostdinc(char *arg, char **next)
 611 {
 612         add_pre_buffer("#nostdinc\n");
 613         return next;
 614 }
 615
 616 static char **handle_base_dir(char *arg, char **next)
 617 {
 618         gcc_base_dir = *++next;
 619         if (!gcc_base_dir)
 620                 die("missing argument for -gcc-base-dir option");
 621         return next;
 622 }
 623
 624 struct switches {
 625         const char *name;
 626         char **(*fn)(char *, char **);
 627 };
 628
 629 static char **handle_switch(char *arg, char **next)
 630 {
 631         static struct switches cmd[] = {
 632                 { "nostdinc", handle_nostdinc },
 633                 { "gcc-base-dir", handle_base_dir},
 634                 { NULL, NULL }
 635         };
 636         struct switches *s;
 637
 638         switch (*arg) {
 639         case 'D': return handle_switch_D(arg, next);
 640         case 'E': return handle_switch_E(arg, next);
 641         case 'I': return handle_switch_I(arg, next);
 642         case 'i': return handle_switch_i(arg, next);
 643         case 'M': return handle_switch_M(arg, next);
 644         case 'm': return handle_switch_m(arg, next);
 645         case 'o': return handle_switch_o(arg, next);
 646         case 'U': return handle_switch_U(arg, next);
 647         case 'v': return handle_switch_v(arg, next);
 648         case 'W': return handle_switch_W(arg, next);
 649         case 'O': return handle_switch_O(arg, next);
 650         case 'f': return handle_switch_f(arg, next);
 651         case 'G': return handle_switch_G(arg, next);
 652         case 'a': return handle_switch_a(arg, next);
 653         case 's': return handle_switch_s(arg, next);
 654         default:
 655                 break;
 656         }
 657
 658         s = cmd;
 659         while (s->name) {
 660                 if (!strcmp(s->name, arg))
 661                         return s->fn(arg, next);
 662                 s++;
 663         }
 664
 665         /*
 666          * Ignore unknown command line options:
 667          * they're probably gcc switches
 668          */
 669         return next;
 670 }
 671
 672 void declare_builtin_functions(void)
 673 {
 674         /* Gaah. gcc knows tons of builtin <string.h> functions */
 675         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 676         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 677         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 678         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 679         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 680         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 681         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 682         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 683         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 684         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 685         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 686         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 687         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 688         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 689
 690         /* And bitwise operations.. */
 691         add_pre_buffer("extern int __builtin_clz(int);\n");
 692         add_pre_buffer("extern int __builtin_clzl(long);\n");
 693         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 694         add_pre_buffer("extern int __builtin_ctz(int);\n");
 695         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 696         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 697         add_pre_buffer("extern int __builtin_ffs(int);\n");
 698         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 699         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 700         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 701         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 702         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 703
 704         /* And some random ones.. */
 705         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 706         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 707         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 708         add_pre_buffer("extern void __builtin_trap(void);\n");
 709         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 710         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 711         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 712         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 713         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 714         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 715         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 716         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 717         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 718         add_pre_buffer("extern long __builtin_labs(long);\n");
 719
 720         /* And some floating point stuff.. */
 721         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 722         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 723         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 724         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 725         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 726         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 727
 728         /* And some __FORTIFY_SOURCE ones.. */
 729         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(void *, int);\n");
 730         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 731         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 732         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 733         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 734         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 735         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 736         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 737         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 738         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 739         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 740         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 741         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 742         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 743 }
 744
 745 void create_builtin_stream(void)
 746 {
 747         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 748         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 749         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 750
 751         /* We add compiler headers path here because we have to parse
 752          * the arguments to get it, falling back to default. */
 753         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
 754         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
 755
 756         add_pre_buffer("#define __extension__\n");
 757         add_pre_buffer("#define __pragma__\n");
 758
 759         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 760         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 761         // it is "long unsigned int".  In either case we can probably
 762         // get away with this.  We need the #weak_define as cgcc will define
 763         // the right __SIZE_TYPE__.
 764         if (size_t_ctype == &ulong_ctype)
 765                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 766         else
 767                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
 768         add_pre_buffer("#weak_define __STDC__ 1\n");
 769
 770         switch (standard)
 771         {
 772                 case STANDARD_C89:
 773                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 774                         break;
 775
 776                 case STANDARD_C94:
 777                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
 778                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 779                         break;
 780
 781                 case STANDARD_C99:
 782                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 783                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 784                         break;
 785
 786                 case STANDARD_GNU89:
 787                         break;
 788
 789                 case STANDARD_GNU99:
 790                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 791                         break;
 792
 793                 default:
 794                         assert (0);
 795         }
 796
 797         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 798         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 799         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
 800         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 801         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 802         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 803         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 804         add_pre_buffer("#define __builtin_va_end(arg)\n");
 805         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 806
 807         /* FIXME! We need to do these as special magic macros at expansion time! */
 808         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 809
 810         if (optimize)
 811                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 812         if (optimize_size)
 813                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 814
 815         /* GCC defines these for limits.h */
 816         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
 817         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
 818         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
 819         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
 820         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
 821         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
 822 }
 823
 824 static struct symbol_list *sparse_tokenstream(struct token *token)
 825 {
 826         // Preprocess the stream
 827         token = preprocess(token);
 828
 829         if (preprocess_only) {
 830                 while (!eof_token(token)) {
 831                         int prec = 1;
 832                         struct token *next = token->next;
 833                         const char *separator = "";
 834                         if (next->pos.whitespace)
 835                                 separator = " ";
 836                         if (next->pos.newline) {
 837                                 separator = "\n\t\t\t\t\t";
 838                                 prec = next->pos.pos;
 839                                 if (prec > 4)
 840                                         prec = 4;
 841                         }
 842                         printf("%s%.*s", show_token(token), prec, separator);
 843                         token = next;
 844                 }
 845                 putchar('\n');
 846
 847                 return NULL;
 848         }
 849
 850         // Parse the resulting C code
 851         while (!eof_token(token))
 852                 token = external_declaration(token, &translation_unit_used_list);
 853         return translation_unit_used_list;
 854 }
 855
 856 static struct symbol_list *sparse_file(const char *filename)
 857 {
 858         int fd;
 859         struct token *token;
 860
 861         if (strcmp (filename, "-") == 0) {
 862                 fd = 0;
 863         } else {
 864                 fd = open(filename, O_RDONLY);
 865                 if (fd < 0)
 866                         die("No such file: %s", filename);
 867         }
 868
 869         // Tokenize the input stream
 870         token = tokenize(filename, fd, NULL, includepath);
 871         close(fd);
 872
 873         return sparse_tokenstream(token);
 874 }
 875
 876 /*
 877  * This handles the "-include" directive etc: we're in global
 878  * scope, and all types/macros etc will affect all the following
 879  * files.
 880  *
 881  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 882  * affect all subsequent files too, i.e. we can have non-local
 883  * behaviour between files!
 884  */
 885 static struct symbol_list *sparse_initial(void)
 886 {
 887         struct token *token;
 888         int i;
 889
 890         // Prepend any "include" file to the stream.
 891         // We're in global scope, it will affect all files!
 892         token = NULL;
 893         for (i = cmdline_include_nr - 1; i >= 0; i--)
 894                 token = tokenize(cmdline_include[i].filename, cmdline_include[i].fd,
 895                                  token, includepath);
 896
 897         // Prepend the initial built-in stream
 898         if (token)
 899                 pre_buffer_end->next = token;
 900         return sparse_tokenstream(pre_buffer_begin);
 901 }
 902
 903 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 904 {
 905         char **args;
 906         struct symbol_list *list;
 907
 908         // Initialize symbol stream first, so that we can add defines etc
 909         init_symbols();
 910
 911         args = argv;
 912         for (;;) {
 913                 char *arg = *++args;
 914                 if (!arg)
 915                         break;
 916
 917                 if (arg[0] == '-' && arg[1]) {
 918                         args = handle_switch(arg+1, args);
 919                         continue;
 920                 }
 921                 add_ptr_list_notag(filelist, arg);
 922         }
 923         handle_switch_W_finalize();
 924         handle_switch_v_finalize();
 925
 926         list = NULL;
 927         if (!ptr_list_empty(filelist)) {
 928                 // Initialize type system
 929                 init_ctype();
 930
 931                 create_builtin_stream();
 932                 add_pre_buffer("#define __CHECKER__ 1\n");
 933                 if (!preprocess_only)
 934                         declare_builtin_functions();
 935
 936                 list = sparse_initial();
 937
 938                 /*
 939                  * Protect the initial token allocations, since
 940                  * they need to survive all the others
 941                  */
 942                 protect_token_alloc();
 943         }
 944         return list;
 945 }
 946
 947 struct symbol_list * sparse_keep_tokens(char *filename)
 948 {
 949         struct symbol_list *res;
 950
 951         /* Clear previous symbol list */
 952         translation_unit_used_list = NULL;
 953
 954         new_file_scope();
 955         res = sparse_file(filename);
 956
 957         /* And return it */
 958         return res;
 959 }
 960
 961
 962 struct symbol_list * __sparse(char *filename)
 963 {
 964         struct symbol_list *res;
 965
 966         res = sparse_keep_tokens(filename);
 967
 968         /* Drop the tokens for this file after parsing */
 969         clear_token_alloc();
 970
 971         /* And return it */
 972         return res;
 973 }
 974
 975 struct symbol_list * sparse(char *filename)
 976 {
 977         struct symbol_list *res = __sparse(filename);
 978
 979         /* Evaluate the complete symbol list */
 980         evaluate_symbol_list(res);
 981
 982         return res;
 983 }