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