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 static const char *multiarch_dir = MULTIARCH_TRIPLET;
  63
  64 struct token *skip_to(struct token *token, int op)
  65 {
  66         while (!match_op(token, op) && !eof_token(token))
  67                 token = token->next;
  68         return token;
  69 }
  70
  71 struct token *expect(struct token *token, int op, const char *where)
  72 {
  73         if (!match_op(token, op)) {
  74                 static struct token bad_token;
  75                 if (token != &bad_token) {
  76                         bad_token.next = token;
  77                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  78                         sparse_error(token->pos, "got %s", show_token(token));
  79                 }
  80                 if (op == ';')
  81                         return skip_to(token, op);
  82                 return &bad_token;
  83         }
  84         return token->next;
  85 }
  86
  87 unsigned int hexval(unsigned int c)
  88 {
  89         int retval = 256;
  90         switch (c) {
  91         case '0'...'9':
  92                 retval = c - '0';
  93                 break;
  94         case 'a'...'f':
  95                 retval = c - 'a' + 10;
  96                 break;
  97         case 'A'...'F':
  98                 retval = c - 'A' + 10;
  99                 break;
 100         }
 101         return retval;
 102 }
 103
 104 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
 105 {
 106         static char buffer[512];
 107         const char *name;
 108
 109         vsprintf(buffer, fmt, args);
 110         name = stream_name(pos.stream);
 111
 112         fprintf(stderr, "%s:%d:%d: %s%s\n",
 113                 name, pos.line, pos.pos, type, buffer);
 114 }
 115
 116 static int max_warnings = 100;
 117 static int show_info = 1;
 118
 119 void info(struct position pos, const char * fmt, ...)
 120 {
 121         va_list args;
 122
 123         if (!show_info)
 124                 return;
 125         va_start(args, fmt);
 126         do_warn("", pos, fmt, args);
 127         va_end(args);
 128 }
 129
 130 static void do_error(struct position pos, const char * fmt, va_list args)
 131 {
 132         static int errors = 0;
 133         die_if_error = 1;
 134         show_info = 1;
 135         /* Shut up warnings after an error */
 136         max_warnings = 0;
 137         if (errors > 100) {
 138                 static int once = 0;
 139                 show_info = 0;
 140                 if (once)
 141                         return;
 142                 fmt = "too many errors";
 143                 once = 1;
 144         }
 145
 146         do_warn("error: ", pos, fmt, args);
 147         errors++;
 148 }
 149
 150 void warning(struct position pos, const char * fmt, ...)
 151 {
 152         va_list args;
 153
 154         if (Wsparse_error) {
 155                 va_start(args, fmt);
 156                 do_error(pos, fmt, args);
 157                 va_end(args);
 158                 return;
 159         }
 160
 161         if (!max_warnings) {
 162                 show_info = 0;
 163                 return;
 164         }
 165
 166         if (!--max_warnings) {
 167                 show_info = 0;
 168                 fmt = "too many warnings";
 169         }
 170
 171         va_start(args, fmt);
 172         do_warn("warning: ", pos, fmt, args);
 173         va_end(args);
 174 }
 175
 176 void sparse_error(struct position pos, const char * fmt, ...)
 177 {
 178         va_list args;
 179         va_start(args, fmt);
 180         do_error(pos, fmt, args);
 181         va_end(args);
 182 }
 183
 184 void expression_error(struct expression *expr, const char *fmt, ...)
 185 {
 186         va_list args;
 187         va_start(args, fmt);
 188         do_error(expr->pos, fmt, args);
 189         va_end(args);
 190         expr->ctype = &bad_ctype;
 191 }
 192
 193 void error_die(struct position pos, const char * fmt, ...)
 194 {
 195         va_list args;
 196         va_start(args, fmt);
 197         do_warn("error: ", pos, fmt, args);
 198         va_end(args);
 199         exit(1);
 200 }
 201
 202 void die(const char *fmt, ...)
 203 {
 204         va_list args;
 205         static char buffer[512];
 206
 207         va_start(args, fmt);
 208         vsnprintf(buffer, sizeof(buffer), fmt, args);
 209         va_end(args);
 210
 211         fprintf(stderr, "%s\n", buffer);
 212         exit(1);
 213 }
 214
 215 static struct token *pre_buffer_begin = NULL;
 216 static struct token *pre_buffer_end = NULL;
 217
 218 int Waddress_space = 1;
 219 int Wbitwise = 0;
 220 int Wcast_to_as = 0;
 221 int Wcast_truncate = 1;
 222 int Wcontext = 1;
 223 int Wdecl = 1;
 224 int Wdeclarationafterstatement = -1;
 225 int Wdefault_bitfield_sign = 0;
 226 int Wdesignated_init = 1;
 227 int Wdo_while = 0;
 228 int Winit_cstring = 0;
 229 int Wenum_mismatch = 1;
 230 int Wsparse_error = 0;
 231 int Wnon_pointer_null = 1;
 232 int Wold_initializer = 1;
 233 int Wone_bit_signed_bitfield = 1;
 234 int Wparen_string = 0;
 235 int Wptr_subtraction_blows = 0;
 236 int Wreturn_void = 0;
 237 int Wshadow = 0;
 238 int Wsizeof_bool = 0;
 239 int Wtransparent_union = 0;
 240 int Wtypesign = 0;
 241 int Wundef = 0;
 242 int Wuninitialized = 1;
 243 int Wunknown_attribute = 1;
 244 int Wvla = 1;
 245
 246 int dbg_entry = 0;
 247 int dbg_dead = 0;
 248
 249 int preprocess_only;
 250
 251 static enum { STANDARD_C89,
 252               STANDARD_C94,
 253               STANDARD_C99,
 254               STANDARD_GNU89,
 255               STANDARD_GNU99, } standard = STANDARD_GNU89;
 256
 257 #ifdef __x86_64__
 258 #define ARCH_M64_DEFAULT 1
 259 #else
 260 #define ARCH_M64_DEFAULT 0
 261 #endif
 262
 263 int arch_m64 = ARCH_M64_DEFAULT;
 264 int arch_msize_long = 0;
 265
 266 #define CMDLINE_INCLUDE 20
 267 static int cmdline_include_nr = 0;
 268 static char *cmdline_include[CMDLINE_INCLUDE];
 269
 270
 271 void add_pre_buffer(const char *fmt, ...)
 272 {
 273         va_list args;
 274         unsigned int size;
 275         struct token *begin, *end;
 276         char buffer[4096];
 277
 278         va_start(args, fmt);
 279         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 280         va_end(args);
 281         begin = tokenize_buffer(buffer, size, &end);
 282         if (!pre_buffer_begin)
 283                 pre_buffer_begin = begin;
 284         if (pre_buffer_end)
 285                 pre_buffer_end->next = begin;
 286         pre_buffer_end = end;
 287 }
 288
 289 static char **handle_switch_D(char *arg, char **next)
 290 {
 291         const char *name = arg + 1;
 292         const char *value = "1";
 293
 294         if (!*name || isspace((unsigned char)*name))
 295                 die("argument to `-D' is missing");
 296
 297         for (;;) {
 298                 char c;
 299                 c = *++arg;
 300                 if (!c)
 301                         break;
 302                 if (isspace((unsigned char)c) || c == '=') {
 303                         *arg = '\0';
 304                         value = arg + 1;
 305                         break;
 306                 }
 307         }
 308         add_pre_buffer("#define %s %s\n", name, value);
 309         return next;
 310 }
 311
 312 static char **handle_switch_E(char *arg, char **next)
 313 {
 314         if (arg[1] == '\0')
 315                 preprocess_only = 1;
 316         return next;
 317 }
 318
 319 static char **handle_switch_I(char *arg, char **next)
 320 {
 321         char *path = arg+1;
 322
 323         switch (arg[1]) {
 324         case '-':
 325                 add_pre_buffer("#split_include\n");
 326                 break;
 327
 328         case '\0':      /* Plain "-I" */
 329                 path = *++next;
 330                 if (!path)
 331                         die("missing argument for -I option");
 332                 /* Fall through */
 333         default:
 334                 add_pre_buffer("#add_include \"%s/\"\n", path);
 335         }
 336         return next;
 337 }
 338
 339 static void add_cmdline_include(char *filename)
 340 {
 341         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 342                 die("too many include files for %s\n", filename);
 343         cmdline_include[cmdline_include_nr++] = filename;
 344 }
 345
 346 static char **handle_switch_i(char *arg, char **next)
 347 {
 348         if (*next && !strcmp(arg, "include"))
 349                 add_cmdline_include(*++next);
 350         else if (*next && !strcmp(arg, "imacros"))
 351                 add_cmdline_include(*++next);
 352         else if (*next && !strcmp(arg, "isystem")) {
 353                 char *path = *++next;
 354                 if (!path)
 355                         die("missing argument for -isystem option");
 356                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 357         } else if (*next && !strcmp(arg, "idirafter")) {
 358                 char *path = *++next;
 359                 if (!path)
 360                         die("missing argument for -idirafter option");
 361                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 362         }
 363         return next;
 364 }
 365
 366 static char **handle_switch_M(char *arg, char **next)
 367 {
 368         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 369                 if (!*next)
 370                         die("missing argument for -%s option", arg);
 371                 return next + 1;
 372         }
 373         return next;
 374 }
 375
 376 static char **handle_multiarch_dir(char *arg, char **next)
 377 {
 378         multiarch_dir = *++next;
 379         if (!multiarch_dir)
 380                 die("missing argument for -multiarch-dir option");
 381         return next;
 382 }
 383
 384 static char **handle_switch_m(char *arg, char **next)
 385 {
 386         if (!strcmp(arg, "m64")) {
 387                 arch_m64 = 1;
 388         } else if (!strcmp(arg, "m32")) {
 389                 arch_m64 = 0;
 390         } else if (!strcmp(arg, "msize-long")) {
 391                 arch_msize_long = 1;
 392         } else if (!strcmp(arg, "multiarch-dir"))
 393                 return handle_multiarch_dir(arg, next);
 394         return next;
 395 }
 396
 397 static void handle_arch_m64_finalize(void)
 398 {
 399         if (arch_m64) {
 400                 bits_in_long = 64;
 401                 max_int_alignment = 8;
 402                 bits_in_pointer = 64;
 403                 pointer_alignment = 8;
 404                 size_t_ctype = &ulong_ctype;
 405                 ssize_t_ctype = &long_ctype;
 406 #ifdef __x86_64__
 407                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 408 #endif
 409         }
 410 }
 411
 412 static void handle_arch_msize_long_finalize(void)
 413 {
 414         if (arch_msize_long) {
 415                 size_t_ctype = &ulong_ctype;
 416                 ssize_t_ctype = &long_ctype;
 417         }
 418 }
 419
 420 static void handle_arch_finalize(void)
 421 {
 422         handle_arch_m64_finalize();
 423         handle_arch_msize_long_finalize();
 424 }
 425
 426
 427 static char **handle_switch_o(char *arg, char **next)
 428 {
 429         if (!strcmp (arg, "o")) {       // "-o foo"
 430                 if (!*++next)
 431                         die("argument to '-o' is missing");
 432         }
 433         // else "-ofoo"
 434
 435         return next;
 436 }
 437
 438 static const struct warning {
 439         const char *name;
 440         int *flag;
 441 } warnings[] = {
 442         { "address-space", &Waddress_space },
 443         { "bitwise", &Wbitwise },
 444         { "cast-to-as", &Wcast_to_as },
 445         { "cast-truncate", &Wcast_truncate },
 446         { "context", &Wcontext },
 447         { "decl", &Wdecl },
 448         { "declaration-after-statement", &Wdeclarationafterstatement },
 449         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 450         { "designated-init", &Wdesignated_init },
 451         { "do-while", &Wdo_while },
 452         { "enum-mismatch", &Wenum_mismatch },
 453         { "sparse-error", &Wsparse_error },
 454         { "init-cstring", &Winit_cstring },
 455         { "non-pointer-null", &Wnon_pointer_null },
 456         { "old-initializer", &Wold_initializer },
 457         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 458         { "paren-string", &Wparen_string },
 459         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 460         { "return-void", &Wreturn_void },
 461         { "shadow", &Wshadow },
 462         { "sizeof-bool", &Wsizeof_bool },
 463         { "transparent-union", &Wtransparent_union },
 464         { "typesign", &Wtypesign },
 465         { "undef", &Wundef },
 466         { "uninitialized", &Wuninitialized },
 467         { "unknown-attribute", &Wunknown_attribute },
 468         { "vla", &Wvla },
 469 };
 470
 471 enum {
 472         WARNING_OFF,
 473         WARNING_ON,
 474         WARNING_FORCE_OFF
 475 };
 476
 477
 478 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 479 {
 480         int flag = WARNING_ON;
 481         char *p = arg + 1;
 482         unsigned i;
 483
 484         if (!strcmp(p, "sparse-all")) {
 485                 for (i = 0; i < n; i++) {
 486                         if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Wsparse_error)
 487                                 *warnings[i].flag = WARNING_ON;
 488                 }
 489         }
 490
 491         // Prefixes "no" and "no-" mean to turn warning off.
 492         if (p[0] == 'n' && p[1] == 'o') {
 493                 p += 2;
 494                 if (p[0] == '-')
 495                         p++;
 496                 flag = WARNING_FORCE_OFF;
 497         }
 498
 499         for (i = 0; i < n; i++) {
 500                 if (!strcmp(p,warnings[i].name)) {
 501                         *warnings[i].flag = flag;
 502                         return next;
 503                 }
 504         }
 505
 506         // Unknown.
 507         return NULL;
 508 }
 509
 510 static char **handle_switch_W(char *arg, char **next)
 511 {
 512         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 513         if (ret)
 514                 return ret;
 515
 516         // Unknown.
 517         return next;
 518 }
 519
 520 static struct warning debugs[] = {
 521         { "entry", &dbg_entry},
 522         { "dead", &dbg_dead},
 523 };
 524
 525
 526 static char **handle_switch_v(char *arg, char **next)
 527 {
 528         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 529         if (ret)
 530                 return ret;
 531
 532         // Unknown.
 533         do {
 534                 verbose++;
 535         } while (*++arg == 'v');
 536         return next;
 537 }
 538
 539
 540 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 541 {
 542         unsigned i;
 543
 544         for (i = 0; i < n; i++) {
 545                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 546                         *warnings[i].flag = WARNING_OFF;
 547         }
 548 }
 549
 550 static void handle_switch_W_finalize(void)
 551 {
 552         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 553
 554         /* default Wdeclarationafterstatement based on the C dialect */
 555         if (-1 == Wdeclarationafterstatement)
 556         {
 557                 switch (standard)
 558                 {
 559                         case STANDARD_C89:
 560                         case STANDARD_C94:
 561                                 Wdeclarationafterstatement = 1;
 562                                 break;
 563
 564                         case STANDARD_C99:
 565                         case STANDARD_GNU89:
 566                         case STANDARD_GNU99:
 567                                 Wdeclarationafterstatement = 0;
 568                                 break;
 569
 570                         default:
 571                                 assert (0);
 572                 }
 573
 574         }
 575 }
 576
 577 static void handle_switch_v_finalize(void)
 578 {
 579         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 580 }
 581
 582 static char **handle_switch_U(char *arg, char **next)
 583 {
 584         const char *name = arg + 1;
 585         add_pre_buffer ("#undef %s\n", name);
 586         return next;
 587 }
 588
 589 static char **handle_switch_O(char *arg, char **next)
 590 {
 591         int level = 1;
 592         if (arg[1] >= '0' && arg[1] <= '9')
 593                 level = arg[1] - '0';
 594         optimize = level;
 595         optimize_size = arg[1] == 's';
 596         return next;
 597 }
 598
 599 static char **handle_switch_ftabstop(char *arg, char **next)
 600 {
 601         char *end;
 602         unsigned long val;
 603
 604         if (*arg == '\0')
 605                 die("error: missing argument to \"-ftabstop=\"");
 606
 607         /* we silently ignore silly values */
 608         val = strtoul(arg, &end, 10);
 609         if (*end == '\0' && 1 <= val && val <= 100)
 610                 tabstop = val;
 611
 612         return next;
 613 }
 614
 615 static char **handle_switch_f(char *arg, char **next)
 616 {
 617         arg++;
 618
 619         if (!strncmp(arg, "tabstop=", 8))
 620                 return handle_switch_ftabstop(arg+8, next);
 621
 622         /* handle switches w/ arguments above, boolean and only boolean below */
 623
 624         if (!strncmp(arg, "no-", 3)) {
 625                 arg += 3;
 626         }
 627         /* handle switch here.. */
 628         return next;
 629 }
 630
 631 static char **handle_switch_G(char *arg, char **next)
 632 {
 633         if (!strcmp (arg, "G") && *next)
 634                 return next + 1; // "-G 0"
 635         else
 636                 return next;     // "-G0" or (bogus) terminal "-G"
 637 }
 638
 639 static char **handle_switch_a(char *arg, char **next)
 640 {
 641         if (!strcmp (arg, "ansi"))
 642                 standard = STANDARD_C89;
 643
 644         return next;
 645 }
 646
 647 static char **handle_switch_s(char *arg, char **next)
 648 {
 649         if (!strncmp (arg, "std=", 4))
 650         {
 651                 arg += 4;
 652
 653                 if (!strcmp (arg, "c89") ||
 654                     !strcmp (arg, "iso9899:1990"))
 655                         standard = STANDARD_C89;
 656
 657                 else if (!strcmp (arg, "iso9899:199409"))
 658                         standard = STANDARD_C94;
 659
 660                 else if (!strcmp (arg, "c99") ||
 661                          !strcmp (arg, "c9x") ||
 662                          !strcmp (arg, "iso9899:1999") ||
 663                          !strcmp (arg, "iso9899:199x"))
 664                         standard = STANDARD_C99;
 665
 666                 else if (!strcmp (arg, "gnu89"))
 667                         standard = STANDARD_GNU89;
 668
 669                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 670                         standard = STANDARD_GNU99;
 671
 672                 else
 673                         die ("Unsupported C dialect");
 674         }
 675
 676         return next;
 677 }
 678
 679 static char **handle_nostdinc(char *arg, char **next)
 680 {
 681         add_pre_buffer("#nostdinc\n");
 682         return next;
 683 }
 684
 685 static char **handle_switch_n(char *arg, char **next)
 686 {
 687         if (!strcmp (arg, "nostdinc"))
 688                 return handle_nostdinc(arg, next);
 689
 690         return next;
 691 }
 692
 693 static char **handle_base_dir(char *arg, char **next)
 694 {
 695         gcc_base_dir = *++next;
 696         if (!gcc_base_dir)
 697                 die("missing argument for -gcc-base-dir option");
 698         return next;
 699 }
 700
 701 static char **handle_switch_g(char *arg, char **next)
 702 {
 703         if (!strcmp (arg, "gcc-base-dir"))
 704                 return handle_base_dir(arg, next);
 705
 706         return next;
 707 }
 708
 709
 710 static char **handle_version(char *arg, char **next)
 711 {
 712         printf("%s\n", SPARSE_VERSION);
 713         exit(0);
 714 }
 715
 716 static char **handle_param(char *arg, char **next)
 717 {
 718         char *value = NULL;
 719
 720         /* For now just skip any '--param=*' or '--param *' */
 721         if (*arg == '\0') {
 722                 value = *++next;
 723         } else if (isspace((unsigned char)*arg) || *arg == '=') {
 724                 value = ++arg;
 725         }
 726
 727         if (!value)
 728                 die("missing argument for --param option");
 729
 730         return next;
 731 }
 732
 733 struct switches {
 734         const char *name;
 735         char **(*fn)(char *, char **);
 736         unsigned int prefix:1;
 737 };
 738
 739 static char **handle_long_options(char *arg, char **next)
 740 {
 741         static struct switches cmd[] = {
 742                 { "param", handle_param, 1 },
 743                 { "version", handle_version },
 744                 { NULL, NULL }
 745         };
 746         struct switches *s = cmd;
 747
 748         while (s->name) {
 749                 int optlen = strlen(s->name);
 750                 if (!strncmp(s->name, arg, optlen + !s->prefix))
 751                         return s->fn(arg + optlen, next);
 752                 s++;
 753         }
 754         return next;
 755 }
 756
 757 static char **handle_switch(char *arg, char **next)
 758 {
 759         switch (*arg) {
 760         case 'a': return handle_switch_a(arg, next);
 761         case 'D': return handle_switch_D(arg, next);
 762         case 'E': return handle_switch_E(arg, next);
 763         case 'f': return handle_switch_f(arg, next);
 764         case 'g': return handle_switch_g(arg, next);
 765         case 'G': return handle_switch_G(arg, next);
 766         case 'I': return handle_switch_I(arg, next);
 767         case 'i': return handle_switch_i(arg, next);
 768         case 'M': return handle_switch_M(arg, next);
 769         case 'm': return handle_switch_m(arg, next);
 770         case 'n': return handle_switch_n(arg, next);
 771         case 'o': return handle_switch_o(arg, next);
 772         case 'O': return handle_switch_O(arg, next);
 773         case 's': return handle_switch_s(arg, next);
 774         case 'U': return handle_switch_U(arg, next);
 775         case 'v': return handle_switch_v(arg, next);
 776         case 'W': return handle_switch_W(arg, next);
 777         case '-': return handle_long_options(arg + 1, next);
 778         default:
 779                 break;
 780         }
 781
 782         /*
 783          * Ignore unknown command line options:
 784          * they're probably gcc switches
 785          */
 786         return next;
 787 }
 788
 789 void declare_builtin_functions(void)
 790 {
 791         /* Gaah. gcc knows tons of builtin <string.h> functions */
 792         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 793         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 794         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 795         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 796         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 797         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 798         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 799         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 800         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 801         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 802         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 803         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 804         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 805         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
 806         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 807
 808         /* And bitwise operations.. */
 809         add_pre_buffer("extern int __builtin_clz(int);\n");
 810         add_pre_buffer("extern int __builtin_clzl(long);\n");
 811         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 812         add_pre_buffer("extern int __builtin_ctz(int);\n");
 813         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 814         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 815         add_pre_buffer("extern int __builtin_ffs(int);\n");
 816         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 817         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 818         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 819         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 820         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 821
 822         /* And byte swaps.. */
 823         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
 824         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
 825         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
 826
 827         /* And atomic memory access functions.. */
 828         add_pre_buffer("extern int __sync_fetch_and_add(void *, ...);\n");
 829         add_pre_buffer("extern int __sync_fetch_and_sub(void *, ...);\n");
 830         add_pre_buffer("extern int __sync_fetch_and_or(void *, ...);\n");
 831         add_pre_buffer("extern int __sync_fetch_and_and(void *, ...);\n");
 832         add_pre_buffer("extern int __sync_fetch_and_xor(void *, ...);\n");
 833         add_pre_buffer("extern int __sync_fetch_and_nand(void *, ...);\n");
 834         add_pre_buffer("extern int __sync_add_and_fetch(void *, ...);\n");
 835         add_pre_buffer("extern int __sync_sub_and_fetch(void *, ...);\n");
 836         add_pre_buffer("extern int __sync_or_and_fetch(void *, ...);\n");
 837         add_pre_buffer("extern int __sync_and_and_fetch(void *, ...);\n");
 838         add_pre_buffer("extern int __sync_xor_and_fetch(void *, ...);\n");
 839         add_pre_buffer("extern int __sync_nand_and_fetch(void *, ...);\n");
 840         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
 841         add_pre_buffer("extern int __sync_val_compare_and_swap(void *, ...);\n");
 842         add_pre_buffer("extern void __sync_synchronize();\n");
 843         add_pre_buffer("extern int __sync_lock_test_and_set(void *, ...);\n");
 844         add_pre_buffer("extern void __sync_lock_release(void *, ...);\n");
 845
 846         /* And some random ones.. */
 847         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 848         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 849         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 850         add_pre_buffer("extern void __builtin_trap(void);\n");
 851         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 852         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 853         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 854         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 855         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 856         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 857         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 858         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 859         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 860         add_pre_buffer("extern long __builtin_labs(long);\n");
 861         add_pre_buffer("extern double __builtin_fabs(double);\n");
 862         add_pre_buffer("extern __SIZE_TYPE__ __builtin_va_arg_pack_len(void);\n");
 863
 864         /* Add Blackfin-specific stuff */
 865         add_pre_buffer(
 866                 "#ifdef __bfin__\n"
 867                 "extern void __builtin_bfin_csync(void);\n"
 868                 "extern void __builtin_bfin_ssync(void);\n"
 869                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
 870                 "#endif\n"
 871         );
 872
 873         /* And some floating point stuff.. */
 874         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 875         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 876         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 877         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 878         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 879         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 880
 881         /* And some INFINITY / NAN stuff.. */
 882         add_pre_buffer("extern double __builtin_huge_val(void);\n");
 883         add_pre_buffer("extern float __builtin_huge_valf(void);\n");
 884         add_pre_buffer("extern long double __builtin_huge_vall(void);\n");
 885         add_pre_buffer("extern double __builtin_inf(void);\n");
 886         add_pre_buffer("extern float __builtin_inff(void);\n");
 887         add_pre_buffer("extern long double __builtin_infl(void);\n");
 888         add_pre_buffer("extern double __builtin_nan(const char *);\n");
 889         add_pre_buffer("extern float __builtin_nanf(const char *);\n");
 890         add_pre_buffer("extern long double __builtin_nanl(const char *);\n");
 891
 892         /* And some __FORTIFY_SOURCE ones.. */
 893         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(const void *, int);\n");
 894         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 895         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 896         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 897         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 898         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 899         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 900         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 901         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 902         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 903         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 904         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 905         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 906         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 907         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
 908 }
 909
 910 void create_builtin_stream(void)
 911 {
 912         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 913         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 914         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 915
 916         /* add the multiarch include directories, if any */
 917         if (multiarch_dir && *multiarch_dir) {
 918                 add_pre_buffer("#add_system \"/usr/include/%s\"\n", multiarch_dir);
 919                 add_pre_buffer("#add_system \"/usr/local/include/%s\"\n", multiarch_dir);
 920         }
 921
 922         /* We add compiler headers path here because we have to parse
 923          * the arguments to get it, falling back to default. */
 924         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
 925         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
 926
 927         add_pre_buffer("#define __extension__\n");
 928         add_pre_buffer("#define __pragma__\n");
 929
 930         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 931         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 932         // it is "long unsigned int".  In either case we can probably
 933         // get away with this.  We need the #weak_define as cgcc will define
 934         // the right __SIZE_TYPE__.
 935         if (size_t_ctype == &ulong_ctype)
 936                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 937         else
 938                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
 939         add_pre_buffer("#weak_define __STDC__ 1\n");
 940
 941         switch (standard)
 942         {
 943                 case STANDARD_C89:
 944                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 945                         break;
 946
 947                 case STANDARD_C94:
 948                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
 949                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 950                         break;
 951
 952                 case STANDARD_C99:
 953                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 954                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 955                         break;
 956
 957                 case STANDARD_GNU89:
 958                         break;
 959
 960                 case STANDARD_GNU99:
 961                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 962                         break;
 963
 964                 default:
 965                         assert (0);
 966         }
 967
 968         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 969         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 970         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
 971         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 972         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 973         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 974         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 975         add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 976         add_pre_buffer("#define __builtin_va_end(arg)\n");
 977         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 978         add_pre_buffer("#define __builtin_va_arg_pack()\n");
 979
 980         /* FIXME! We need to do these as special magic macros at expansion time! */
 981         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 982
 983         if (optimize)
 984                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 985         if (optimize_size)
 986                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 987
 988         /* GCC defines these for limits.h */
 989         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
 990         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
 991         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
 992         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
 993         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
 994         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
 995         add_pre_buffer("#weak_define __SIZEOF_POINTER__ " STRINGIFY(__SIZEOF_POINTER__) "\n");
 996         add_pre_buffer("#weak_define __CHAR_BIT__ " STRINGIFY(__CHAR_BIT__) "\n");
 997 }
 998
 999 static struct symbol_list *sparse_tokenstream(struct token *token)
1000 {
1001         // Preprocess the stream
1002         token = preprocess(token);
1003
1004         if (preprocess_only) {
1005                 while (!eof_token(token)) {
1006                         int prec = 1;
1007                         struct token *next = token->next;
1008                         const char *separator = "";
1009                         if (next->pos.whitespace)
1010                                 separator = " ";
1011                         if (next->pos.newline) {
1012                                 separator = "\n\t\t\t\t\t";
1013                                 prec = next->pos.pos;
1014                                 if (prec > 4)
1015                                         prec = 4;
1016                         }
1017                         printf("%s%.*s", show_token(token), prec, separator);
1018                         token = next;
1019                 }
1020                 putchar('\n');
1021
1022                 return NULL;
1023         }
1024
1025         // Parse the resulting C code
1026         while (!eof_token(token))
1027                 token = external_declaration(token, &translation_unit_used_list);
1028         return translation_unit_used_list;
1029 }
1030
1031 static struct symbol_list *sparse_file(const char *filename)
1032 {
1033         int fd;
1034         struct token *token;
1035
1036         if (strcmp (filename, "-") == 0) {
1037                 fd = 0;
1038         } else {
1039                 fd = open(filename, O_RDONLY);
1040                 if (fd < 0)
1041                         die("No such file: %s", filename);
1042         }
1043
1044         // Tokenize the input stream
1045         token = tokenize(filename, fd, NULL, includepath);
1046         close(fd);
1047
1048         return sparse_tokenstream(token);
1049 }
1050
1051 /*
1052  * This handles the "-include" directive etc: we're in global
1053  * scope, and all types/macros etc will affect all the following
1054  * files.
1055  *
1056  * NOTE NOTE NOTE! "#undef" of anything in this stage will
1057  * affect all subsequent files too, i.e. we can have non-local
1058  * behaviour between files!
1059  */
1060 static struct symbol_list *sparse_initial(void)
1061 {
1062         int i;
1063
1064         // Prepend any "include" file to the stream.
1065         // We're in global scope, it will affect all files!
1066         for (i = 0; i < cmdline_include_nr; i++)
1067                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1068
1069         return sparse_tokenstream(pre_buffer_begin);
1070 }
1071
1072 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1073 {
1074         char **args;
1075         struct symbol_list *list;
1076
1077         // Initialize symbol stream first, so that we can add defines etc
1078         init_symbols();
1079
1080         args = argv;
1081         for (;;) {
1082                 char *arg = *++args;
1083                 if (!arg)
1084                         break;
1085
1086                 if (arg[0] == '-' && arg[1]) {
1087                         args = handle_switch(arg+1, args);
1088                         continue;
1089                 }
1090                 add_ptr_list_notag(filelist, arg);
1091         }
1092         handle_switch_W_finalize();
1093         handle_switch_v_finalize();
1094
1095         handle_arch_finalize();
1096
1097         list = NULL;
1098         if (!ptr_list_empty(filelist)) {
1099                 // Initialize type system
1100                 init_ctype();
1101
1102                 create_builtin_stream();
1103                 add_pre_buffer("#define __CHECKER__ 1\n");
1104                 if (!preprocess_only)
1105                         declare_builtin_functions();
1106
1107                 list = sparse_initial();
1108
1109                 /*
1110                  * Protect the initial token allocations, since
1111                  * they need to survive all the others
1112                  */
1113                 protect_token_alloc();
1114         }
1115         return list;
1116 }
1117
1118 struct symbol_list * sparse_keep_tokens(char *filename)
1119 {
1120         struct symbol_list *res;
1121
1122         /* Clear previous symbol list */
1123         translation_unit_used_list = NULL;
1124
1125         new_file_scope();
1126         res = sparse_file(filename);
1127
1128         /* And return it */
1129         return res;
1130 }
1131
1132
1133 struct symbol_list * __sparse(char *filename)
1134 {
1135         struct symbol_list *res;
1136
1137         res = sparse_keep_tokens(filename);
1138
1139         /* Drop the tokens for this file after parsing */
1140         clear_token_alloc();
1141
1142         /* And return it */
1143         return res;
1144 }
1145
1146 struct symbol_list * sparse(char *filename)
1147 {
1148         struct symbol_list *res = __sparse(filename);
1149
1150         /* Evaluate the complete symbol list */
1151         evaluate_symbol_list(res);
1152
1153         return res;
1154 }