lib.c

   1 /*
   2  * 'sparse' library helper routines.
   3  *
   4  * Copyright (C) 2003 Transmeta Corp.
   5  *               2003-2004 Linus Torvalds
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <stdarg.h>
  28 #include <stddef.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <assert.h>
  34
  35 #include <sys/types.h>
  36
  37 #include "lib.h"
  38 #include "allocate.h"
  39 #include "token.h"
  40 #include "parse.h"
  41 #include "symbol.h"
  42 #include "expression.h"
  43 #include "scope.h"
  44 #include "linearize.h"
  45 #include "target.h"
  46 #include "version.h"
  47
  48 int verbose, optimize, optimize_size, preprocessing;
  49 int die_if_error = 0;
  50
  51 #ifndef __GNUC__
  52 # define __GNUC__ 2
  53 # define __GNUC_MINOR__ 95
  54 # define __GNUC_PATCHLEVEL__ 0
  55 #endif
  56
  57 int gcc_major = __GNUC__;
  58 int gcc_minor = __GNUC_MINOR__;
  59 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  60
  61 static const char *gcc_base_dir = GCC_BASE;
  62
  63 struct token *skip_to(struct token *token, int op)
  64 {
  65         while (!match_op(token, op) && !eof_token(token))
  66                 token = token->next;
  67         return token;
  68 }
  69
  70 struct token *expect(struct token *token, int op, const char *where)
  71 {
  72         if (!match_op(token, op)) {
  73                 static struct token bad_token;
  74                 if (token != &bad_token) {
  75                         bad_token.next = token;
  76                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  77                         sparse_error(token->pos, "got %s", show_token(token));
  78                 }
  79                 if (op == ';')
  80                         return skip_to(token, op);
  81                 return &bad_token;
  82         }
  83         return token->next;
  84 }
  85
  86 unsigned int hexval(unsigned int c)
  87 {
  88         int retval = 256;
  89         switch (c) {
  90         case '0'...'9':
  91                 retval = c - '0';
  92                 break;
  93         case 'a'...'f':
  94                 retval = c - 'a' + 10;
  95                 break;
  96         case 'A'...'F':
  97                 retval = c - 'A' + 10;
  98                 break;
  99         }
 100         return retval;
 101 }
 102
 103 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
 104 {
 105         static char buffer[512];
 106         const char *name;
 107
 108         vsprintf(buffer, fmt, args);
 109         name = stream_name(pos.stream);
 110
 111         fprintf(stderr, "%s:%d:%d: %s%s\n",
 112                 name, pos.line, pos.pos, type, buffer);
 113 }
 114
 115 static int max_warnings = 100;
 116 static int show_info = 1;
 117
 118 void info(struct position pos, const char * fmt, ...)
 119 {
 120         va_list args;
 121
 122         if (!show_info)
 123                 return;
 124         va_start(args, fmt);
 125         do_warn("", pos, fmt, args);
 126         va_end(args);
 127 }
 128
 129 static void do_error(struct position pos, const char * fmt, va_list args)
 130 {
 131         static int errors = 0;
 132         die_if_error = 1;
 133         show_info = 1;
 134         /* Shut up warnings after an error */
 135         max_warnings = 0;
 136         if (errors > 100) {
 137                 static int once = 0;
 138                 show_info = 0;
 139                 if (once)
 140                         return;
 141                 fmt = "too many errors";
 142                 once = 1;
 143         }
 144
 145         do_warn("error: ", pos, fmt, args);
 146         errors++;
 147 }
 148
 149 void warning(struct position pos, const char * fmt, ...)
 150 {
 151         va_list args;
 152
 153         if (Werror) {
 154                 va_start(args, fmt);
 155                 do_error(pos, fmt, args);
 156                 va_end(args);
 157                 return;
 158         }
 159
 160         if (!max_warnings) {
 161                 show_info = 0;
 162                 return;
 163         }
 164
 165         if (!--max_warnings) {
 166                 show_info = 0;
 167                 fmt = "too many warnings";
 168         }
 169
 170         va_start(args, fmt);
 171         do_warn("warning: ", pos, fmt, args);
 172         va_end(args);
 173 }
 174
 175 void sparse_error(struct position pos, const char * fmt, ...)
 176 {
 177         va_list args;
 178         va_start(args, fmt);
 179         do_error(pos, fmt, args);
 180         va_end(args);
 181 }
 182
 183 void expression_error(struct expression *expr, const char *fmt, ...)
 184 {
 185         va_list args;
 186         va_start(args, fmt);
 187         do_error(expr->pos, fmt, args);
 188         va_end(args);
 189         expr->ctype = &bad_ctype;
 190 }
 191
 192 void error_die(struct position pos, const char * fmt, ...)
 193 {
 194         va_list args;
 195         va_start(args, fmt);
 196         do_warn("error: ", pos, fmt, args);
 197         va_end(args);
 198         exit(1);
 199 }
 200
 201 void die(const char *fmt, ...)
 202 {
 203         va_list args;
 204         static char buffer[512];
 205
 206         va_start(args, fmt);
 207         vsnprintf(buffer, sizeof(buffer), fmt, args);
 208         va_end(args);
 209
 210         fprintf(stderr, "%s\n", buffer);
 211         exit(1);
 212 }
 213
 214 static struct token *pre_buffer_begin = NULL;
 215 static struct token *pre_buffer_end = NULL;
 216
 217 int Waddress_space = 1;
 218 int Wbitwise = 0;
 219 int Wcast_to_as = 0;
 220 int Wcast_truncate = 1;
 221 int Wcontext = 1;
 222 int Wdecl = 1;
 223 int Wdeclarationafterstatement = -1;
 224 int Wdefault_bitfield_sign = 0;
 225 int Wdesignated_init = 1;
 226 int Wdo_while = 0;
 227 int Winit_cstring = 0;
 228 int Wenum_mismatch = 1;
 229 int Werror = 0;
 230 int Wnon_pointer_null = 1;
 231 int Wold_initializer = 1;
 232 int Wone_bit_signed_bitfield = 1;
 233 int Wparen_string = 0;
 234 int Wptr_subtraction_blows = 0;
 235 int Wreturn_void = 0;
 236 int Wshadow = 0;
 237 int Wsizeof_bool = 0;
 238 int Wtransparent_union = 0;
 239 int Wtypesign = 0;
 240 int Wundef = 0;
 241 int Wuninitialized = 1;
 242 int Wvla = 1;
 243
 244 int dbg_entry = 0;
 245 int dbg_dead = 0;
 246
 247 int preprocess_only;
 248
 249 static enum { STANDARD_C89,
 250               STANDARD_C94,
 251               STANDARD_C99,
 252               STANDARD_GNU89,
 253               STANDARD_GNU99, } standard = STANDARD_GNU89;
 254
 255 #ifdef __x86_64__
 256 #define ARCH_M64_DEFAULT 1
 257 #else
 258 #define ARCH_M64_DEFAULT 0
 259 #endif
 260
 261 int arch_m64 = ARCH_M64_DEFAULT;
 262 int arch_msize_long = 0;
 263
 264 #define CMDLINE_INCLUDE 20
 265 static int cmdline_include_nr = 0;
 266 static char *cmdline_include[CMDLINE_INCLUDE];
 267
 268
 269 void add_pre_buffer(const char *fmt, ...)
 270 {
 271         va_list args;
 272         unsigned int size;
 273         struct token *begin, *end;
 274         char buffer[4096];
 275
 276         va_start(args, fmt);
 277         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 278         va_end(args);
 279         begin = tokenize_buffer(buffer, size, &end);
 280         if (!pre_buffer_begin)
 281                 pre_buffer_begin = begin;
 282         if (pre_buffer_end)
 283                 pre_buffer_end->next = begin;
 284         pre_buffer_end = end;
 285 }
 286
 287 static char **handle_switch_D(char *arg, char **next)
 288 {
 289         const char *name = arg + 1;
 290         const char *value = "1";
 291
 292         if (!*name || isspace(*name))
 293                 die("argument to `-D' is missing");
 294
 295         for (;;) {
 296                 char c;
 297                 c = *++arg;
 298                 if (!c)
 299                         break;
 300                 if (isspace((unsigned char)c) || c == '=') {
 301                         *arg = '\0';
 302                         value = arg + 1;
 303                         break;
 304                 }
 305         }
 306         add_pre_buffer("#define %s %s\n", name, value);
 307         return next;
 308 }
 309
 310 static char **handle_switch_E(char *arg, char **next)
 311 {
 312         if (arg[1] == '\0')
 313                 preprocess_only = 1;
 314         return next;
 315 }
 316
 317 static char **handle_switch_I(char *arg, char **next)
 318 {
 319         char *path = arg+1;
 320
 321         switch (arg[1]) {
 322         case '-':
 323                 add_pre_buffer("#split_include\n");
 324                 break;
 325
 326         case '\0':      /* Plain "-I" */
 327                 path = *++next;
 328                 if (!path)
 329                         die("missing argument for -I option");
 330                 /* Fall through */
 331         default:
 332                 add_pre_buffer("#add_include \"%s/\"\n", path);
 333         }
 334         return next;
 335 }
 336
 337 static void add_cmdline_include(char *filename)
 338 {
 339         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 340                 die("too many include files for %s\n", filename);
 341         cmdline_include[cmdline_include_nr++] = filename;
 342 }
 343
 344 static char **handle_switch_i(char *arg, char **next)
 345 {
 346         if (*next && !strcmp(arg, "include"))
 347                 add_cmdline_include(*++next);
 348         else if (*next && !strcmp(arg, "imacros"))
 349                 add_cmdline_include(*++next);
 350         else if (*next && !strcmp(arg, "isystem")) {
 351                 char *path = *++next;
 352                 if (!path)
 353                         die("missing argument for -isystem option");
 354                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 355         } else if (*next && !strcmp(arg, "idirafter")) {
 356                 char *path = *++next;
 357                 if (!path)
 358                         die("missing argument for -idirafter option");
 359                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 360         }
 361         return next;
 362 }
 363
 364 static char **handle_switch_M(char *arg, char **next)
 365 {
 366         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 367                 if (!*next)
 368                         die("missing argument for -%s option", arg);
 369                 return next + 1;
 370         }
 371         return next;
 372 }
 373
 374 static char **handle_switch_m(char *arg, char **next)
 375 {
 376         if (!strcmp(arg, "m64")) {
 377                 arch_m64 = 1;
 378         } else if (!strcmp(arg, "m32")) {
 379                 arch_m64 = 0;
 380         } else if (!strcmp(arg, "msize-long")) {
 381                 arch_msize_long = 1;
 382         }
 383         return next;
 384 }
 385
 386 static void handle_arch_m64_finalize(void)
 387 {
 388         if (arch_m64) {
 389                 bits_in_long = 64;
 390                 max_int_alignment = 8;
 391                 bits_in_pointer = 64;
 392                 pointer_alignment = 8;
 393                 size_t_ctype = &ulong_ctype;
 394                 ssize_t_ctype = &long_ctype;
 395 #ifdef __x86_64__
 396                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 397 #endif
 398         }
 399 }
 400
 401 static void handle_arch_msize_long_finalize(void)
 402 {
 403         if (arch_msize_long) {
 404                 size_t_ctype = &ulong_ctype;
 405                 ssize_t_ctype = &long_ctype;
 406         }
 407 }
 408
 409 static void handle_arch_finalize(void)
 410 {
 411         handle_arch_m64_finalize();
 412         handle_arch_msize_long_finalize();
 413 }
 414
 415
 416 static char **handle_switch_o(char *arg, char **next)
 417 {
 418         if (!strcmp (arg, "o")) {       // "-o foo"
 419                 if (!*++next)
 420                         die("argument to '-o' is missing");
 421         }
 422         // else "-ofoo"
 423
 424         return next;
 425 }
 426
 427 static const struct warning {
 428         const char *name;
 429         int *flag;
 430 } warnings[] = {
 431         { "address-space", &Waddress_space },
 432         { "bitwise", &Wbitwise },
 433         { "cast-to-as", &Wcast_to_as },
 434         { "cast-truncate", &Wcast_truncate },
 435         { "context", &Wcontext },
 436         { "decl", &Wdecl },
 437         { "declaration-after-statement", &Wdeclarationafterstatement },
 438         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 439         { "designated-init", &Wdesignated_init },
 440         { "do-while", &Wdo_while },
 441         { "enum-mismatch", &Wenum_mismatch },
 442         { "error", &Werror },
 443         { "init-cstring", &Winit_cstring },
 444         { "non-pointer-null", &Wnon_pointer_null },
 445         { "old-initializer", &Wold_initializer },
 446         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 447         { "paren-string", &Wparen_string },
 448         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 449         { "return-void", &Wreturn_void },
 450         { "shadow", &Wshadow },
 451         { "sizeof-bool", &Wsizeof_bool },
 452         { "transparent-union", &Wtransparent_union },
 453         { "typesign", &Wtypesign },
 454         { "undef", &Wundef },
 455         { "uninitialized", &Wuninitialized },
 456         { "vla", &Wvla },
 457 };
 458
 459 enum {
 460         WARNING_OFF,
 461         WARNING_ON,
 462         WARNING_FORCE_OFF
 463 };
 464
 465
 466 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 467 {
 468         int flag = WARNING_ON;
 469         char *p = arg + 1;
 470         unsigned i;
 471
 472         if (!strcmp(p, "sparse-all")) {
 473                 for (i = 0; i < n; i++) {
 474                         if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Werror)
 475                                 *warnings[i].flag = WARNING_ON;
 476                 }
 477         }
 478
 479         // Prefixes "no" and "no-" mean to turn warning off.
 480         if (p[0] == 'n' && p[1] == 'o') {
 481                 p += 2;
 482                 if (p[0] == '-')
 483                         p++;
 484                 flag = WARNING_FORCE_OFF;
 485         }
 486
 487         for (i = 0; i < n; i++) {
 488                 if (!strcmp(p,warnings[i].name)) {
 489                         *warnings[i].flag = flag;
 490                         return next;
 491                 }
 492         }
 493
 494         // Unknown.
 495         return NULL;
 496 }
 497
 498 static char **handle_switch_W(char *arg, char **next)
 499 {
 500         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 501         if (ret)
 502                 return ret;
 503
 504         // Unknown.
 505         return next;
 506 }
 507
 508 static struct warning debugs[] = {
 509         { "entry", &dbg_entry},
 510         { "dead", &dbg_dead},
 511 };
 512
 513
 514 static char **handle_switch_v(char *arg, char **next)
 515 {
 516         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 517         if (ret)
 518                 return ret;
 519
 520         // Unknown.
 521         do {
 522                 verbose++;
 523         } while (*++arg == 'v');
 524         return next;
 525 }
 526
 527
 528 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 529 {
 530         unsigned i;
 531
 532         for (i = 0; i < n; i++) {
 533                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 534                         *warnings[i].flag = WARNING_OFF;
 535         }
 536 }
 537
 538 static void handle_switch_W_finalize(void)
 539 {
 540         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 541
 542         /* default Wdeclarationafterstatement based on the C dialect */
 543         if (-1 == Wdeclarationafterstatement)
 544         {
 545                 switch (standard)
 546                 {
 547                         case STANDARD_C89:
 548                         case STANDARD_C94:
 549                                 Wdeclarationafterstatement = 1;
 550                                 break;
 551
 552                         case STANDARD_C99:
 553                         case STANDARD_GNU89:
 554                         case STANDARD_GNU99:
 555                                 Wdeclarationafterstatement = 0;
 556                                 break;
 557
 558                         default:
 559                                 assert (0);
 560                 }
 561
 562         }
 563 }
 564
 565 static void handle_switch_v_finalize(void)
 566 {
 567         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 568 }
 569
 570 static char **handle_switch_U(char *arg, char **next)
 571 {
 572         const char *name = arg + 1;
 573         add_pre_buffer ("#undef %s\n", name);
 574         return next;
 575 }
 576
 577 static char **handle_switch_O(char *arg, char **next)
 578 {
 579         int level = 1;
 580         if (arg[1] >= '0' && arg[1] <= '9')
 581                 level = arg[1] - '0';
 582         optimize = level;
 583         optimize_size = arg[1] == 's';
 584         return next;
 585 }
 586
 587 static char **handle_switch_ftabstop(char *arg, char **next)
 588 {
 589         char *end;
 590         unsigned long val;
 591
 592         if (*arg == '\0')
 593                 die("error: missing argument to \"-ftabstop=\"");
 594
 595         /* we silently ignore silly values */
 596         val = strtoul(arg, &end, 10);
 597         if (*end == '\0' && 1 <= val && val <= 100)
 598                 tabstop = val;
 599
 600         return next;
 601 }
 602
 603 static char **handle_switch_f(char *arg, char **next)
 604 {
 605         arg++;
 606
 607         if (!strncmp(arg, "tabstop=", 8))
 608                 return handle_switch_ftabstop(arg+8, next);
 609
 610         /* handle switches w/ arguments above, boolean and only boolean below */
 611
 612         if (!strncmp(arg, "no-", 3)) {
 613                 arg += 3;
 614         }
 615         /* handle switch here.. */
 616         return next;
 617 }
 618
 619 static char **handle_switch_G(char *arg, char **next)
 620 {
 621         if (!strcmp (arg, "G") && *next)
 622                 return next + 1; // "-G 0"
 623         else
 624                 return next;     // "-G0" or (bogus) terminal "-G"
 625 }
 626
 627 static char **handle_switch_a(char *arg, char **next)
 628 {
 629         if (!strcmp (arg, "ansi"))
 630                 standard = STANDARD_C89;
 631
 632         return next;
 633 }
 634
 635 static char **handle_switch_s(char *arg, char **next)
 636 {
 637         if (!strncmp (arg, "std=", 4))
 638         {
 639                 arg += 4;
 640
 641                 if (!strcmp (arg, "c89") ||
 642                     !strcmp (arg, "iso9899:1990"))
 643                         standard = STANDARD_C89;
 644
 645                 else if (!strcmp (arg, "iso9899:199409"))
 646                         standard = STANDARD_C94;
 647
 648                 else if (!strcmp (arg, "c99") ||
 649                          !strcmp (arg, "c9x") ||
 650                          !strcmp (arg, "iso9899:1999") ||
 651                          !strcmp (arg, "iso9899:199x"))
 652                         standard = STANDARD_C99;
 653
 654                 else if (!strcmp (arg, "gnu89"))
 655                         standard = STANDARD_GNU89;
 656
 657                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 658                         standard = STANDARD_GNU99;
 659
 660                 else
 661                         die ("Unsupported C dialect");
 662         }
 663
 664         return next;
 665 }
 666
 667 static char **handle_nostdinc(char *arg, char **next)
 668 {
 669         add_pre_buffer("#nostdinc\n");
 670         return next;
 671 }
 672
 673 static char **handle_switch_n(char *arg, char **next)
 674 {
 675         if (!strcmp (arg, "nostdinc"))
 676                 return handle_nostdinc(arg, next);
 677
 678         return next;
 679 }
 680
 681 static char **handle_base_dir(char *arg, char **next)
 682 {
 683         gcc_base_dir = *++next;
 684         if (!gcc_base_dir)
 685                 die("missing argument for -gcc-base-dir option");
 686         return next;
 687 }
 688
 689 static char **handle_no_lineno(char *arg, char **next)
 690 {
 691         no_lineno = 1;
 692         return next;
 693 }
 694
 695 static char **handle_switch_g(char *arg, char **next)
 696 {
 697         if (!strcmp (arg, "gcc-base-dir"))
 698                 return handle_base_dir(arg, next);
 699
 700         return next;
 701 }
 702
 703 static char **handle_version(char *arg, char **next)
 704 {
 705         printf("%s\n", SPARSE_VERSION);
 706         exit(0);
 707 }
 708
 709 static char **handle_param(char *arg, char **next)
 710 {
 711         char *value = NULL;
 712
 713         /* For now just skip any '--param=*' or '--param *' */
 714         if (*arg == '\0') {
 715                 value = *++next;
 716         } else if (isspace(*arg) || *arg == '=') {
 717                 value = ++arg;
 718         }
 719
 720         if (!value)
 721                 die("missing argument for --param option");
 722
 723         return next;
 724 }
 725
 726 struct switches {
 727         const char *name;
 728         char **(*fn)(char *, char **);
 729         unsigned int prefix:1;
 730 };
 731
 732 static char **handle_long_options(char *arg, char **next)
 733 {
 734         static struct switches cmd[] = {
 735                 { "param", handle_param, 1 },
 736                 { "version", handle_version },
 737                 { "nostdinc", handle_nostdinc },
 738                 { "gcc-base-dir", handle_base_dir},
 739                 { "no-lineno", handle_no_lineno},
 740                 { NULL, NULL }
 741         };
 742         struct switches *s = cmd;
 743
 744         while (s->name) {
 745                 int optlen = strlen(s->name);
 746                 if (!strncmp(s->name, arg, optlen + !s->prefix))
 747                         return s->fn(arg + optlen, next);
 748                 s++;
 749         }
 750         return next;
 751 }
 752
 753 static char **handle_switch(char *arg, char **next)
 754 {
 755         switch (*arg) {
 756         case 'a': return handle_switch_a(arg, next);
 757         case 'D': return handle_switch_D(arg, next);
 758         case 'E': return handle_switch_E(arg, next);
 759         case 'f': return handle_switch_f(arg, next);
 760         case 'g': return handle_switch_g(arg, next);
 761         case 'G': return handle_switch_G(arg, next);
 762         case 'I': return handle_switch_I(arg, next);
 763         case 'i': return handle_switch_i(arg, next);
 764         case 'M': return handle_switch_M(arg, next);
 765         case 'm': return handle_switch_m(arg, next);
 766         case 'n': return handle_switch_n(arg, next);
 767         case 'o': return handle_switch_o(arg, next);
 768         case 'O': return handle_switch_O(arg, next);
 769         case 's': return handle_switch_s(arg, next);
 770         case 'U': return handle_switch_U(arg, next);
 771         case 'v': return handle_switch_v(arg, next);
 772         case 'W': return handle_switch_W(arg, next);
 773         case '-': return handle_long_options(arg + 1, next);
 774         default:
 775                 break;
 776         }
 777
 778         /*
 779          * Ignore unknown command line options:
 780          * they're probably gcc switches
 781          */
 782         return next;
 783 }
 784
 785 void declare_builtin_functions(void)
 786 {
 787         /* Gaah. gcc knows tons of builtin <string.h> functions */
 788         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 789         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 790         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 791         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 792         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 793         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 794         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 795         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 796         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 797         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 798         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 799         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 800         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 801         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
 802         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 803
 804         /* And bitwise operations.. */
 805         add_pre_buffer("extern int __builtin_clz(int);\n");
 806         add_pre_buffer("extern int __builtin_clzl(long);\n");
 807         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 808         add_pre_buffer("extern int __builtin_ctz(int);\n");
 809         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 810         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 811         add_pre_buffer("extern int __builtin_ffs(int);\n");
 812         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 813         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 814         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 815         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 816         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 817
 818         /* And byte swaps.. */
 819         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
 820         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
 821         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
 822
 823         /* And atomic memory access functions.. */
 824         add_pre_buffer("extern int __sync_fetch_and_add(void *, ...);\n");
 825         add_pre_buffer("extern int __sync_fetch_and_sub(void *, ...);\n");
 826         add_pre_buffer("extern int __sync_fetch_and_or(void *, ...);\n");
 827         add_pre_buffer("extern int __sync_fetch_and_and(void *, ...);\n");
 828         add_pre_buffer("extern int __sync_fetch_and_xor(void *, ...);\n");
 829         add_pre_buffer("extern int __sync_fetch_and_nand(void *, ...);\n");
 830         add_pre_buffer("extern int __sync_add_and_fetch(void *, ...);\n");
 831         add_pre_buffer("extern int __sync_sub_and_fetch(void *, ...);\n");
 832         add_pre_buffer("extern int __sync_or_and_fetch(void *, ...);\n");
 833         add_pre_buffer("extern int __sync_and_and_fetch(void *, ...);\n");
 834         add_pre_buffer("extern int __sync_xor_and_fetch(void *, ...);\n");
 835         add_pre_buffer("extern int __sync_nand_and_fetch(void *, ...);\n");
 836         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
 837         add_pre_buffer("extern int __sync_val_compare_and_swap(void *, ...);\n");
 838         add_pre_buffer("extern void __sync_synchronize();\n");
 839         add_pre_buffer("extern int __sync_lock_test_and_set(void *, ...);\n");
 840         add_pre_buffer("extern void __sync_lock_release(void *, ...);\n");
 841
 842         /* And some random ones.. */
 843         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 844         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 845         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 846         add_pre_buffer("extern void __builtin_trap(void);\n");
 847         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 848         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 849         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 850         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 851         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 852         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 853         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 854         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 855         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 856         add_pre_buffer("extern long __builtin_labs(long);\n");
 857         add_pre_buffer("extern double __builtin_fabs(double);\n");
 858         add_pre_buffer("extern __SIZE_TYPE__ __builtin_va_arg_pack_len(void);\n");
 859
 860         /* Add Blackfin-specific stuff */
 861         add_pre_buffer(
 862                 "#ifdef __bfin__\n"
 863                 "extern void __builtin_bfin_csync(void);\n"
 864                 "extern void __builtin_bfin_ssync(void);\n"
 865                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
 866                 "#endif\n"
 867         );
 868
 869         /* And some floating point stuff.. */
 870         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 871         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 872         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 873         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 874         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 875         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 876
 877         /* And some __FORTIFY_SOURCE ones.. */
 878         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(void *, int);\n");
 879         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 880         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 881         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 882         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 883         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 884         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 885         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 886         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 887         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 888         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 889         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 890         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 891         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 892         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
 893 }
 894
 895 void create_builtin_stream(void)
 896 {
 897         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 898         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 899         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 900
 901         /* We add compiler headers path here because we have to parse
 902          * the arguments to get it, falling back to default. */
 903         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
 904         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
 905
 906         add_pre_buffer("#define __extension__\n");
 907         add_pre_buffer("#define __pragma__\n");
 908
 909         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 910         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 911         // it is "long unsigned int".  In either case we can probably
 912         // get away with this.  We need the #weak_define as cgcc will define
 913         // the right __SIZE_TYPE__.
 914         if (size_t_ctype == &ulong_ctype)
 915                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 916         else
 917                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
 918         add_pre_buffer("#weak_define __STDC__ 1\n");
 919
 920         switch (standard)
 921         {
 922                 case STANDARD_C89:
 923                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 924                         break;
 925
 926                 case STANDARD_C94:
 927                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
 928                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 929                         break;
 930
 931                 case STANDARD_C99:
 932                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 933                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 934                         break;
 935
 936                 case STANDARD_GNU89:
 937                         break;
 938
 939                 case STANDARD_GNU99:
 940                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 941                         break;
 942
 943                 default:
 944                         assert (0);
 945         }
 946
 947         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 948         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 949         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
 950         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 951         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 952         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 953         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 954         add_pre_buffer("#define __builtin_va_end(arg)\n");
 955         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 956         add_pre_buffer("#define __builtin_va_arg_pack()\n");
 957
 958         /* FIXME! We need to do these as special magic macros at expansion time! */
 959         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 960
 961         if (optimize)
 962                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 963         if (optimize_size)
 964                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 965
 966         /* GCC defines these for limits.h */
 967         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
 968         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
 969         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
 970         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
 971         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
 972         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
 973         add_pre_buffer("#weak_define __SIZEOF_POINTER__ " STRINGIFY(__SIZEOF_POINTER__) "\n");
 974         add_pre_buffer("#weak_define __CHAR_BIT__ " STRINGIFY(__CHAR_BIT__) "\n");
 975 }
 976
 977 static struct symbol_list *sparse_tokenstream(struct token *token)
 978 {
 979         // Preprocess the stream
 980         token = preprocess(token);
 981
 982         if (preprocess_only) {
 983                 while (!eof_token(token)) {
 984                         int prec = 1;
 985                         struct token *next = token->next;
 986                         const char *separator = "";
 987                         if (next->pos.whitespace)
 988                                 separator = " ";
 989                         if (next->pos.newline) {
 990                                 separator = "\n\t\t\t\t\t";
 991                                 prec = next->pos.pos;
 992                                 if (prec > 4)
 993                                         prec = 4;
 994                         }
 995                         printf("%s%.*s", show_token(token), prec, separator);
 996                         token = next;
 997                 }
 998                 putchar('\n');
 999
1000                 return NULL;
1001         }
1002
1003         // Parse the resulting C code
1004         while (!eof_token(token))
1005                 token = external_declaration(token, &translation_unit_used_list);
1006         return translation_unit_used_list;
1007 }
1008
1009 static struct symbol_list *sparse_file(const char *filename)
1010 {
1011         int fd;
1012         struct token *token;
1013
1014         if (strcmp (filename, "-") == 0) {
1015                 fd = 0;
1016         } else {
1017                 fd = open(filename, O_RDONLY);
1018                 if (fd < 0)
1019                         die("No such file: %s", filename);
1020         }
1021
1022         // Tokenize the input stream
1023         token = tokenize(filename, fd, NULL, includepath);
1024         store_all_tokens(token);
1025         close(fd);
1026
1027         return sparse_tokenstream(token);
1028 }
1029
1030 /*
1031  * This handles the "-include" directive etc: we're in global
1032  * scope, and all types/macros etc will affect all the following
1033  * files.
1034  *
1035  * NOTE NOTE NOTE! "#undef" of anything in this stage will
1036  * affect all subsequent files too, i.e. we can have non-local
1037  * behaviour between files!
1038  */
1039 static struct symbol_list *sparse_initial(void)
1040 {
1041         int i;
1042
1043         // Prepend any "include" file to the stream.
1044         // We're in global scope, it will affect all files!
1045         for (i = 0; i < cmdline_include_nr; i++)
1046                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1047
1048         return sparse_tokenstream(pre_buffer_begin);
1049 }
1050
1051 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1052 {
1053         char **args;
1054         struct symbol_list *list;
1055
1056         // Initialize symbol stream first, so that we can add defines etc
1057         init_symbols();
1058
1059         args = argv;
1060         for (;;) {
1061                 char *arg = *++args;
1062                 if (!arg)
1063                         break;
1064
1065                 if (arg[0] == '-' && arg[1]) {
1066                         args = handle_switch(arg+1, args);
1067                         continue;
1068                 }
1069                 add_ptr_list_notag(filelist, arg);
1070         }
1071         handle_switch_W_finalize();
1072         handle_switch_v_finalize();
1073
1074         handle_arch_finalize();
1075
1076         list = NULL;
1077         if (!ptr_list_empty(filelist)) {
1078                 // Initialize type system
1079                 init_ctype();
1080
1081                 create_builtin_stream();
1082                 add_pre_buffer("#define __CHECKER__ 1\n");
1083                 if (!preprocess_only)
1084                         declare_builtin_functions();
1085
1086                 list = sparse_initial();
1087
1088                 /*
1089                  * Protect the initial token allocations, since
1090                  * they need to survive all the others
1091                  */
1092                 protect_token_alloc();
1093         }
1094         return list;
1095 }
1096
1097 struct symbol_list * sparse_keep_tokens(char *filename)
1098 {
1099         struct symbol_list *res;
1100
1101         /* Clear previous symbol list */
1102         translation_unit_used_list = NULL;
1103
1104         new_file_scope();
1105         res = sparse_file(filename);
1106
1107         /* And return it */
1108         return res;
1109 }
1110
1111
1112 struct symbol_list * __sparse(char *filename)
1113 {
1114         struct symbol_list *res;
1115
1116         res = sparse_keep_tokens(filename);
1117
1118         /* Drop the tokens for this file after parsing */
1119         clear_token_alloc();
1120
1121         /* And return it */
1122         return res;
1123 }
1124
1125 struct symbol_list * sparse(char *filename)
1126 {
1127         struct symbol_list *res = __sparse(filename);
1128
1129         /* Evaluate the complete symbol list */
1130         evaluate_symbol_list(res);
1131
1132         return res;
1133 }