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 int has_error = 0;
  51
  52 #ifndef __GNUC__
  53 # define __GNUC__ 2
  54 # define __GNUC_MINOR__ 95
  55 # define __GNUC_PATCHLEVEL__ 0
  56 #endif
  57
  58 int gcc_major = __GNUC__;
  59 int gcc_minor = __GNUC_MINOR__;
  60 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  61
  62 static const char *gcc_base_dir = GCC_BASE;
  63 static const char *multiarch_dir = MULTIARCH_TRIPLET;
  64
  65 struct token *skip_to(struct token *token, int op)
  66 {
  67         while (!match_op(token, op) && !eof_token(token))
  68                 token = token->next;
  69         return token;
  70 }
  71
  72 struct token *expect(struct token *token, int op, const char *where)
  73 {
  74         if (!match_op(token, op)) {
  75                 static struct token bad_token;
  76                 if (token != &bad_token) {
  77                         bad_token.next = token;
  78                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  79                         sparse_error(token->pos, "got %s", show_token(token));
  80                 }
  81                 if (op == ';')
  82                         return skip_to(token, op);
  83                 return &bad_token;
  84         }
  85         return token->next;
  86 }
  87
  88 unsigned int hexval(unsigned int c)
  89 {
  90         int retval = 256;
  91         switch (c) {
  92         case '0'...'9':
  93                 retval = c - '0';
  94                 break;
  95         case 'a'...'f':
  96                 retval = c - 'a' + 10;
  97                 break;
  98         case 'A'...'F':
  99                 retval = c - 'A' + 10;
 100                 break;
 101         }
 102         return retval;
 103 }
 104
 105 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
 106 {
 107         static char buffer[512];
 108         const char *name;
 109
 110         vsprintf(buffer, fmt, args);
 111         name = stream_name(pos.stream);
 112
 113         fprintf(stderr, "%s:%d:%d: %s%s\n",
 114                 name, pos.line, pos.pos, type, buffer);
 115 }
 116
 117 static int max_warnings = 100;
 118 static int show_info = 1;
 119
 120 void info(struct position pos, const char * fmt, ...)
 121 {
 122         va_list args;
 123
 124         if (!show_info)
 125                 return;
 126         va_start(args, fmt);
 127         do_warn("", pos, fmt, args);
 128         va_end(args);
 129 }
 130
 131 static void do_error(struct position pos, const char * fmt, va_list args)
 132 {
 133         static int errors = 0;
 134         die_if_error = 1;
 135         show_info = 1;
 136         /* Shut up warnings after an error */
 137         has_error |= ERROR_CURR_PHASE;
 138         if (errors > 100) {
 139                 static int once = 0;
 140                 show_info = 0;
 141                 if (once)
 142                         return;
 143                 fmt = "too many errors";
 144                 once = 1;
 145         }
 146
 147         do_warn("error: ", pos, fmt, args);
 148         errors++;
 149 }
 150
 151 void warning(struct position pos, const char * fmt, ...)
 152 {
 153         va_list args;
 154
 155         if (Wsparse_error) {
 156                 va_start(args, fmt);
 157                 do_error(pos, fmt, args);
 158                 va_end(args);
 159                 return;
 160         }
 161
 162         if (!max_warnings || has_error) {
 163                 show_info = 0;
 164                 return;
 165         }
 166
 167         if (!--max_warnings) {
 168                 show_info = 0;
 169                 fmt = "too many warnings";
 170         }
 171
 172         va_start(args, fmt);
 173         do_warn("warning: ", pos, fmt, args);
 174         va_end(args);
 175 }
 176
 177 void sparse_error(struct position pos, const char * fmt, ...)
 178 {
 179         va_list args;
 180         va_start(args, fmt);
 181         do_error(pos, fmt, args);
 182         va_end(args);
 183 }
 184
 185 void expression_error(struct expression *expr, const char *fmt, ...)
 186 {
 187         va_list args;
 188         va_start(args, fmt);
 189         do_error(expr->pos, fmt, args);
 190         va_end(args);
 191         expr->ctype = &bad_ctype;
 192 }
 193
 194 void error_die(struct position pos, const char * fmt, ...)
 195 {
 196         va_list args;
 197         va_start(args, fmt);
 198         do_warn("error: ", pos, fmt, args);
 199         va_end(args);
 200         exit(1);
 201 }
 202
 203 void die(const char *fmt, ...)
 204 {
 205         va_list args;
 206         static char buffer[512];
 207
 208         va_start(args, fmt);
 209         vsnprintf(buffer, sizeof(buffer), fmt, args);
 210         va_end(args);
 211
 212         fprintf(stderr, "%s\n", buffer);
 213         exit(1);
 214 }
 215
 216 static struct token *pre_buffer_begin = NULL;
 217 static struct token *pre_buffer_end = NULL;
 218
 219 int Waddress = 0;
 220 int Waddress_space = 1;
 221 int Wbitwise = 1;
 222 int Wcast_to_as = 0;
 223 int Wcast_truncate = 1;
 224 int Wcontext = 1;
 225 int Wdecl = 1;
 226 int Wdeclarationafterstatement = -1;
 227 int Wdefault_bitfield_sign = 0;
 228 int Wdesignated_init = 1;
 229 int Wdo_while = 0;
 230 int Winit_cstring = 0;
 231 int Wenum_mismatch = 1;
 232 int Wsparse_error = 0;
 233 int Wmemcpy_max_count = 1;
 234 int Wnon_pointer_null = 1;
 235 int Wold_initializer = 1;
 236 int Wone_bit_signed_bitfield = 1;
 237 int Woverride_init = 1;
 238 int Woverride_init_all = 0;
 239 int Woverride_init_whole_range = 0;
 240 int Wparen_string = 0;
 241 int Wptr_subtraction_blows = 0;
 242 int Wreturn_void = 0;
 243 int Wshadow = 0;
 244 int Wsizeof_bool = 0;
 245 int Wtautological_compare = 0;
 246 int Wtransparent_union = 0;
 247 int Wtypesign = 0;
 248 int Wundef = 0;
 249 int Wuninitialized = 1;
 250 int Wunknown_attribute = 1;
 251 int Wvla = 1;
 252
 253 int dump_macro_defs = 0;
 254
 255 int dbg_entry = 0;
 256 int dbg_dead = 0;
 257
 258 int fmem_report = 0;
 259 int fdump_linearize;
 260 unsigned long long fmemcpy_max_count = 100000;
 261
 262 int preprocess_only;
 263
 264 static enum { STANDARD_C89,
 265               STANDARD_C94,
 266               STANDARD_C99,
 267               STANDARD_C11,
 268               STANDARD_GNU11,
 269               STANDARD_GNU89,
 270               STANDARD_GNU99, } standard = STANDARD_GNU89;
 271
 272 #define ARCH_LP32  0
 273 #define ARCH_LP64  1
 274 #define ARCH_LLP64 2
 275
 276 #ifdef __x86_64__
 277 #define ARCH_M64_DEFAULT ARCH_LP64
 278 #else
 279 #define ARCH_M64_DEFAULT ARCH_LP32
 280 #endif
 281
 282 int arch_m64 = ARCH_M64_DEFAULT;
 283 int arch_msize_long = 0;
 284
 285 #ifdef __BIG_ENDIAN__
 286 #define ARCH_BIG_ENDIAN 1
 287 #else
 288 #define ARCH_BIG_ENDIAN 0
 289 #endif
 290 int arch_big_endian = ARCH_BIG_ENDIAN;
 291
 292
 293 #define CMDLINE_INCLUDE 20
 294 static int cmdline_include_nr = 0;
 295 static char *cmdline_include[CMDLINE_INCLUDE];
 296
 297
 298 void add_pre_buffer(const char *fmt, ...)
 299 {
 300         va_list args;
 301         unsigned int size;
 302         struct token *begin, *end;
 303         char buffer[4096];
 304
 305         va_start(args, fmt);
 306         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 307         va_end(args);
 308         begin = tokenize_buffer(buffer, size, &end);
 309         if (!pre_buffer_begin)
 310                 pre_buffer_begin = begin;
 311         if (pre_buffer_end)
 312                 pre_buffer_end->next = begin;
 313         pre_buffer_end = end;
 314 }
 315
 316 static char **handle_switch_D(char *arg, char **next)
 317 {
 318         const char *name = arg + 1;
 319         const char *value = "1";
 320
 321         if (!*name || isspace((unsigned char)*name))
 322                 die("argument to `-D' is missing");
 323
 324         for (;;) {
 325                 char c;
 326                 c = *++arg;
 327                 if (!c)
 328                         break;
 329                 if (isspace((unsigned char)c) || c == '=') {
 330                         *arg = '\0';
 331                         value = arg + 1;
 332                         break;
 333                 }
 334         }
 335         add_pre_buffer("#define %s %s\n", name, value);
 336         return next;
 337 }
 338
 339 static char **handle_switch_E(char *arg, char **next)
 340 {
 341         if (arg[1] == '\0')
 342                 preprocess_only = 1;
 343         return next;
 344 }
 345
 346 static char **handle_switch_I(char *arg, char **next)
 347 {
 348         char *path = arg+1;
 349
 350         switch (arg[1]) {
 351         case '-':
 352                 add_pre_buffer("#split_include\n");
 353                 break;
 354
 355         case '\0':      /* Plain "-I" */
 356                 path = *++next;
 357                 if (!path)
 358                         die("missing argument for -I option");
 359                 /* Fall through */
 360         default:
 361                 add_pre_buffer("#add_include \"%s/\"\n", path);
 362         }
 363         return next;
 364 }
 365
 366 static void add_cmdline_include(char *filename)
 367 {
 368         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 369                 die("too many include files for %s\n", filename);
 370         cmdline_include[cmdline_include_nr++] = filename;
 371 }
 372
 373 static char **handle_switch_i(char *arg, char **next)
 374 {
 375         if (*next && !strcmp(arg, "include"))
 376                 add_cmdline_include(*++next);
 377         else if (*next && !strcmp(arg, "imacros"))
 378                 add_cmdline_include(*++next);
 379         else if (*next && !strcmp(arg, "isystem")) {
 380                 char *path = *++next;
 381                 if (!path)
 382                         die("missing argument for -isystem option");
 383                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 384         } else if (*next && !strcmp(arg, "idirafter")) {
 385                 char *path = *++next;
 386                 if (!path)
 387                         die("missing argument for -idirafter option");
 388                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 389         }
 390         return next;
 391 }
 392
 393 static char **handle_switch_M(char *arg, char **next)
 394 {
 395         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 396                 if (!*next)
 397                         die("missing argument for -%s option", arg);
 398                 return next + 1;
 399         }
 400         return next;
 401 }
 402
 403 static char **handle_multiarch_dir(char *arg, char **next)
 404 {
 405         multiarch_dir = *++next;
 406         if (!multiarch_dir)
 407                 die("missing argument for -multiarch-dir option");
 408         return next;
 409 }
 410
 411 static char **handle_switch_m(char *arg, char **next)
 412 {
 413         if (!strcmp(arg, "m64")) {
 414                 arch_m64 = ARCH_LP64;
 415         } else if (!strcmp(arg, "m32")) {
 416                 arch_m64 = ARCH_LP32;
 417         } else if (!strcmp(arg, "msize-llp64")) {
 418                 arch_m64 = ARCH_LLP64;
 419         } else if (!strcmp(arg, "msize-long")) {
 420                 arch_msize_long = 1;
 421         } else if (!strcmp(arg, "multiarch-dir")) {
 422                 return handle_multiarch_dir(arg, next);
 423         } else if (!strcmp(arg, "mbig-endian")) {
 424                 arch_big_endian = 1;
 425         } else if (!strcmp(arg, "mlittle-endian")) {
 426                 arch_big_endian = 0;
 427         }
 428         return next;
 429 }
 430
 431 static void handle_arch_m64_finalize(void)
 432 {
 433         switch (arch_m64) {
 434         case ARCH_LP32:
 435                 /* default values */
 436                 return;
 437         case ARCH_LP64:
 438                 bits_in_long = 64;
 439                 max_int_alignment = 8;
 440                 size_t_ctype = &ulong_ctype;
 441                 ssize_t_ctype = &long_ctype;
 442                 add_pre_buffer("#weak_define __LP64__ 1\n");
 443                 add_pre_buffer("#weak_define _LP64 1\n");
 444                 goto case_64bit_common;
 445         case ARCH_LLP64:
 446                 bits_in_long = 32;
 447                 max_int_alignment = 4;
 448                 size_t_ctype = &ullong_ctype;
 449                 ssize_t_ctype = &llong_ctype;
 450                 add_pre_buffer("#weak_define __LLP64__ 1\n");
 451                 goto case_64bit_common;
 452         case_64bit_common:
 453                 bits_in_pointer = 64;
 454                 pointer_alignment = 8;
 455 #ifdef __x86_64__
 456                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 457 #endif
 458                 break;
 459         }
 460 }
 461
 462 static void handle_arch_msize_long_finalize(void)
 463 {
 464         if (arch_msize_long) {
 465                 size_t_ctype = &ulong_ctype;
 466                 ssize_t_ctype = &long_ctype;
 467         }
 468 }
 469
 470 static void handle_arch_finalize(void)
 471 {
 472         handle_arch_m64_finalize();
 473         handle_arch_msize_long_finalize();
 474 }
 475
 476
 477 static int handle_simple_switch(const char *arg, const char *name, int *flag)
 478 {
 479         int val = 1;
 480
 481         // Prefixe "no-" mean to turn flag off.
 482         if (strncmp(arg, "no-", 3) == 0) {
 483                 arg += 3;
 484                 val = 0;
 485         }
 486
 487         if (strcmp(arg, name) == 0) {
 488                 *flag = val;
 489                 return 1;
 490         }
 491
 492         // not handled
 493         return 0;
 494 }
 495
 496 static char **handle_switch_o(char *arg, char **next)
 497 {
 498         if (!strcmp (arg, "o")) {       // "-o foo"
 499                 if (!*++next)
 500                         die("argument to '-o' is missing");
 501         }
 502         // else "-ofoo"
 503
 504         return next;
 505 }
 506
 507 static const struct warning {
 508         const char *name;
 509         int *flag;
 510 } warnings[] = {
 511         { "address", &Waddress },
 512         { "address-space", &Waddress_space },
 513         { "bitwise", &Wbitwise },
 514         { "cast-to-as", &Wcast_to_as },
 515         { "cast-truncate", &Wcast_truncate },
 516         { "context", &Wcontext },
 517         { "decl", &Wdecl },
 518         { "declaration-after-statement", &Wdeclarationafterstatement },
 519         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 520         { "designated-init", &Wdesignated_init },
 521         { "do-while", &Wdo_while },
 522         { "enum-mismatch", &Wenum_mismatch },
 523         { "init-cstring", &Winit_cstring },
 524         { "memcpy-max-count", &Wmemcpy_max_count },
 525         { "non-pointer-null", &Wnon_pointer_null },
 526         { "old-initializer", &Wold_initializer },
 527         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 528         { "override-init", &Woverride_init },
 529         { "override-init-all", &Woverride_init_all },
 530         { "paren-string", &Wparen_string },
 531         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 532         { "return-void", &Wreturn_void },
 533         { "shadow", &Wshadow },
 534         { "sizeof-bool", &Wsizeof_bool },
 535         { "sparse-error", &Wsparse_error },
 536         { "tautological-compare", &Wtautological_compare },
 537         { "transparent-union", &Wtransparent_union },
 538         { "typesign", &Wtypesign },
 539         { "undef", &Wundef },
 540         { "uninitialized", &Wuninitialized },
 541         { "unknown-attribute", &Wunknown_attribute },
 542         { "vla", &Wvla },
 543 };
 544
 545 enum {
 546         WARNING_OFF,
 547         WARNING_ON,
 548         WARNING_FORCE_OFF
 549 };
 550
 551
 552 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 553 {
 554         int flag = WARNING_ON;
 555         char *p = arg + 1;
 556         unsigned i;
 557
 558         if (!strcmp(p, "sparse-all")) {
 559                 for (i = 0; i < n; i++) {
 560                         if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Wsparse_error)
 561                                 *warnings[i].flag = WARNING_ON;
 562                 }
 563         }
 564
 565         // Prefixes "no" and "no-" mean to turn warning off.
 566         if (p[0] == 'n' && p[1] == 'o') {
 567                 p += 2;
 568                 if (p[0] == '-')
 569                         p++;
 570                 flag = WARNING_FORCE_OFF;
 571         }
 572
 573         for (i = 0; i < n; i++) {
 574                 if (!strcmp(p,warnings[i].name)) {
 575                         *warnings[i].flag = flag;
 576                         return next;
 577                 }
 578         }
 579
 580         // Unknown.
 581         return NULL;
 582 }
 583
 584 static char **handle_switch_W(char *arg, char **next)
 585 {
 586         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 587         if (ret)
 588                 return ret;
 589
 590         // Unknown.
 591         return next;
 592 }
 593
 594 static struct warning debugs[] = {
 595         { "entry", &dbg_entry},
 596         { "dead", &dbg_dead},
 597 };
 598
 599
 600 static char **handle_switch_v(char *arg, char **next)
 601 {
 602         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 603         if (ret)
 604                 return ret;
 605
 606         // Unknown.
 607         do {
 608                 verbose++;
 609         } while (*++arg == 'v');
 610         return next;
 611 }
 612
 613 static struct warning dumps[] = {
 614         { "D", &dump_macro_defs},
 615 };
 616
 617 static char **handle_switch_d(char *arg, char **next)
 618 {
 619         char ** ret = handle_onoff_switch(arg, next, dumps, ARRAY_SIZE(dumps));
 620         if (ret)
 621                 return ret;
 622
 623         return next;
 624 }
 625
 626
 627 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 628 {
 629         unsigned i;
 630
 631         for (i = 0; i < n; i++) {
 632                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 633                         *warnings[i].flag = WARNING_OFF;
 634         }
 635 }
 636
 637 static void handle_switch_W_finalize(void)
 638 {
 639         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 640
 641         /* default Wdeclarationafterstatement based on the C dialect */
 642         if (-1 == Wdeclarationafterstatement)
 643         {
 644                 switch (standard)
 645                 {
 646                         case STANDARD_C89:
 647                         case STANDARD_C94:
 648                                 Wdeclarationafterstatement = 1;
 649                                 break;
 650
 651                         case STANDARD_C99:
 652                         case STANDARD_GNU89:
 653                         case STANDARD_GNU99:
 654                         case STANDARD_C11:
 655                         case STANDARD_GNU11:
 656                                 Wdeclarationafterstatement = 0;
 657                                 break;
 658
 659                         default:
 660                                 assert (0);
 661                 }
 662
 663         }
 664 }
 665
 666 static void handle_switch_v_finalize(void)
 667 {
 668         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 669 }
 670
 671 static char **handle_switch_U(char *arg, char **next)
 672 {
 673         const char *name = arg + 1;
 674         add_pre_buffer ("#undef %s\n", name);
 675         return next;
 676 }
 677
 678 static char **handle_switch_O(char *arg, char **next)
 679 {
 680         int level = 1;
 681         if (arg[1] >= '0' && arg[1] <= '9')
 682                 level = arg[1] - '0';
 683         optimize = level;
 684         optimize_size = arg[1] == 's';
 685         return next;
 686 }
 687
 688 static char **handle_switch_fmemcpy_max_count(char *arg, char **next)
 689 {
 690         unsigned long long val;
 691         char *end;
 692
 693         val = strtoull(arg, &end, 0);
 694         if (*end != '\0' || end == arg)
 695                 die("error: missing argument to \"-fmemcpy-max-count=\"");
 696
 697         if (val == 0)
 698                 val = ~0ULL;
 699         fmemcpy_max_count = val;
 700         return next;
 701 }
 702
 703 static char **handle_switch_ftabstop(char *arg, char **next)
 704 {
 705         char *end;
 706         unsigned long val;
 707
 708         if (*arg == '\0')
 709                 die("error: missing argument to \"-ftabstop=\"");
 710
 711         /* we silently ignore silly values */
 712         val = strtoul(arg, &end, 10);
 713         if (*end == '\0' && 1 <= val && val <= 100)
 714                 tabstop = val;
 715
 716         return next;
 717 }
 718
 719 static char **handle_switch_fdump(char *arg, char **next)
 720 {
 721         if (!strncmp(arg, "linearize", 9)) {
 722                 arg += 9;
 723                 if (*arg == '\0')
 724                         fdump_linearize = 1;
 725                 else if (!strcmp(arg, "=only"))
 726                         fdump_linearize = 2;
 727                 else
 728                         goto err;
 729         }
 730
 731         /* ignore others flags */
 732         return next;
 733
 734 err:
 735         die("error: unknown flag \"-fdump-%s\"", arg);
 736 }
 737
 738 static char **handle_switch_f(char *arg, char **next)
 739 {
 740         arg++;
 741
 742         if (!strncmp(arg, "tabstop=", 8))
 743                 return handle_switch_ftabstop(arg+8, next);
 744         if (!strncmp(arg, "dump-", 5))
 745                 return handle_switch_fdump(arg+5, next);
 746         if (!strncmp(arg, "memcpy-max-count=", 17))
 747                 return handle_switch_fmemcpy_max_count(arg+17, next);
 748
 749         /* handle switches w/ arguments above, boolean and only boolean below */
 750         if (handle_simple_switch(arg, "mem-report", &fmem_report))
 751                 return next;
 752
 753         return next;
 754 }
 755
 756 static char **handle_switch_G(char *arg, char **next)
 757 {
 758         if (!strcmp (arg, "G") && *next)
 759                 return next + 1; // "-G 0"
 760         else
 761                 return next;     // "-G0" or (bogus) terminal "-G"
 762 }
 763
 764 static char **handle_switch_a(char *arg, char **next)
 765 {
 766         if (!strcmp (arg, "ansi"))
 767                 standard = STANDARD_C89;
 768
 769         return next;
 770 }
 771
 772 static char **handle_switch_s(char *arg, char **next)
 773 {
 774         if (!strncmp (arg, "std=", 4))
 775         {
 776                 arg += 4;
 777
 778                 if (!strcmp (arg, "c89") ||
 779                     !strcmp (arg, "iso9899:1990"))
 780                         standard = STANDARD_C89;
 781
 782                 else if (!strcmp (arg, "iso9899:199409"))
 783                         standard = STANDARD_C94;
 784
 785                 else if (!strcmp (arg, "c99") ||
 786                          !strcmp (arg, "c9x") ||
 787                          !strcmp (arg, "iso9899:1999") ||
 788                          !strcmp (arg, "iso9899:199x"))
 789                         standard = STANDARD_C99;
 790
 791                 else if (!strcmp (arg, "gnu89"))
 792                         standard = STANDARD_GNU89;
 793
 794                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 795                         standard = STANDARD_GNU99;
 796
 797                 else if (!strcmp(arg, "c11") ||
 798                          !strcmp(arg, "c1x") ||
 799                          !strcmp(arg, "iso9899:2011"))
 800                         standard = STANDARD_C11;
 801
 802                 else if (!strcmp(arg, "gnu11"))
 803                         standard = STANDARD_GNU11;
 804
 805                 else
 806                         die ("Unsupported C dialect");
 807         }
 808
 809         return next;
 810 }
 811
 812 static char **handle_nostdinc(char *arg, char **next)
 813 {
 814         add_pre_buffer("#nostdinc\n");
 815         return next;
 816 }
 817
 818 static char **handle_switch_n(char *arg, char **next)
 819 {
 820         if (!strcmp (arg, "nostdinc"))
 821                 return handle_nostdinc(arg, next);
 822
 823         return next;
 824 }
 825
 826 static char **handle_base_dir(char *arg, char **next)
 827 {
 828         gcc_base_dir = *++next;
 829         if (!gcc_base_dir)
 830                 die("missing argument for -gcc-base-dir option");
 831         return next;
 832 }
 833
 834 static char **handle_switch_g(char *arg, char **next)
 835 {
 836         if (!strcmp (arg, "gcc-base-dir"))
 837                 return handle_base_dir(arg, next);
 838
 839         return next;
 840 }
 841
 842
 843 static char **handle_version(char *arg, char **next)
 844 {
 845         printf("%s\n", SPARSE_VERSION);
 846         exit(0);
 847 }
 848
 849 static char **handle_param(char *arg, char **next)
 850 {
 851         char *value = NULL;
 852
 853         /* For now just skip any '--param=*' or '--param *' */
 854         if (*arg == '\0') {
 855                 value = *++next;
 856         } else if (isspace((unsigned char)*arg) || *arg == '=') {
 857                 value = ++arg;
 858         }
 859
 860         if (!value)
 861                 die("missing argument for --param option");
 862
 863         return next;
 864 }
 865
 866 struct switches {
 867         const char *name;
 868         char **(*fn)(char *, char **);
 869         unsigned int prefix:1;
 870 };
 871
 872 static char **handle_long_options(char *arg, char **next)
 873 {
 874         static struct switches cmd[] = {
 875                 { "param", handle_param, 1 },
 876                 { "version", handle_version },
 877                 { NULL, NULL }
 878         };
 879         struct switches *s = cmd;
 880
 881         while (s->name) {
 882                 int optlen = strlen(s->name);
 883                 if (!strncmp(s->name, arg, optlen + !s->prefix))
 884                         return s->fn(arg + optlen, next);
 885                 s++;
 886         }
 887         return next;
 888 }
 889
 890 static char **handle_switch(char *arg, char **next)
 891 {
 892         switch (*arg) {
 893         case 'a': return handle_switch_a(arg, next);
 894         case 'D': return handle_switch_D(arg, next);
 895         case 'd': return handle_switch_d(arg, next);
 896         case 'E': return handle_switch_E(arg, next);
 897         case 'f': return handle_switch_f(arg, next);
 898         case 'g': return handle_switch_g(arg, next);
 899         case 'G': return handle_switch_G(arg, next);
 900         case 'I': return handle_switch_I(arg, next);
 901         case 'i': return handle_switch_i(arg, next);
 902         case 'M': return handle_switch_M(arg, next);
 903         case 'm': return handle_switch_m(arg, next);
 904         case 'n': return handle_switch_n(arg, next);
 905         case 'o': return handle_switch_o(arg, next);
 906         case 'O': return handle_switch_O(arg, next);
 907         case 's': return handle_switch_s(arg, next);
 908         case 'U': return handle_switch_U(arg, next);
 909         case 'v': return handle_switch_v(arg, next);
 910         case 'W': return handle_switch_W(arg, next);
 911         case '-': return handle_long_options(arg + 1, next);
 912         default:
 913                 break;
 914         }
 915
 916         /*
 917          * Ignore unknown command line options:
 918          * they're probably gcc switches
 919          */
 920         return next;
 921 }
 922
 923 static void predefined_sizeof(const char *name, unsigned bits)
 924 {
 925         add_pre_buffer("#weak_define __SIZEOF_%s__ %d\n", name, bits/8);
 926 }
 927
 928 static void predefined_max(const char *name, const char *suffix, unsigned bits)
 929 {
 930         unsigned long long max = (1ULL << (bits - 1 )) - 1;
 931
 932         add_pre_buffer("#weak_define __%s_MAX__ %#llx%s\n", name, max, suffix);
 933 }
 934
 935 static void predefined_type_size(const char *name, const char *suffix, unsigned bits)
 936 {
 937         predefined_max(name, suffix, bits);
 938         predefined_sizeof(name, bits);
 939 }
 940
 941 static void predefined_macros(void)
 942 {
 943         add_pre_buffer("#define __CHECKER__ 1\n");
 944
 945         predefined_sizeof("SHORT", bits_in_short);
 946         predefined_max("SHRT", "", bits_in_short);
 947         predefined_max("SCHAR", "", bits_in_char);
 948         predefined_max("WCHAR", "", bits_in_wchar);
 949         add_pre_buffer("#weak_define __CHAR_BIT__ %d\n", bits_in_char);
 950
 951         predefined_type_size("INT", "", bits_in_int);
 952         predefined_type_size("LONG", "L", bits_in_long);
 953         predefined_type_size("LONG_LONG", "LL", bits_in_longlong);
 954
 955         predefined_sizeof("INT128", 128);
 956
 957         predefined_sizeof("SIZE_T", bits_in_pointer);
 958         predefined_sizeof("PTRDIFF_T", bits_in_pointer);
 959         predefined_sizeof("POINTER", bits_in_pointer);
 960
 961         predefined_sizeof("FLOAT", bits_in_float);
 962         predefined_sizeof("DOUBLE", bits_in_double);
 963         predefined_sizeof("LONG_DOUBLE", bits_in_longdouble);
 964
 965         add_pre_buffer("#weak_define __%s_ENDIAN__ 1\n",
 966                 arch_big_endian ? "BIG" : "LITTLE");
 967
 968         add_pre_buffer("#weak_define __ORDER_LITTLE_ENDIAN__ 1234\n");
 969         add_pre_buffer("#weak_define __ORDER_BIG_ENDIAN__ 4321\n");
 970         add_pre_buffer("#weak_define __ORDER_PDP_ENDIAN__ 3412\n");
 971         add_pre_buffer("#weak_define __BYTE_ORDER__ __ORDER_%s_ENDIAN__\n",
 972                 arch_big_endian ? "BIG" : "LITTLE");
 973 }
 974
 975 void declare_builtin_functions(void)
 976 {
 977         /* Gaah. gcc knows tons of builtin <string.h> functions */
 978         add_pre_buffer("extern void *__builtin_memchr(const void *, int, __SIZE_TYPE__);\n");
 979         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 980         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 981         add_pre_buffer("extern void *__builtin_memmove(void *, const void *, __SIZE_TYPE__);\n");
 982         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 983         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 984         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 985         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 986         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 987         add_pre_buffer("extern int __builtin_strncmp(const char *, const char *, __SIZE_TYPE__);\n");
 988         add_pre_buffer("extern int __builtin_strcasecmp(const char *, const char *);\n");
 989         add_pre_buffer("extern int __builtin_strncasecmp(const char *, const char *, __SIZE_TYPE__);\n");
 990         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 991         add_pre_buffer("extern char *__builtin_strrchr(const char *, int);\n");
 992         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 993         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 994         add_pre_buffer("extern char *__builtin_strdup(const char *);\n");
 995         add_pre_buffer("extern char *__builtin_strndup(const char *, __SIZE_TYPE__);\n");
 996         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 997         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 998         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 999         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
1000         add_pre_buffer("extern char* __builtin_stpncpy(const char *, const char*, __SIZE_TYPE__);\n");
1001         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
1002         add_pre_buffer("extern char *__builtin_strstr(const char *, const char *);\n");
1003         add_pre_buffer("extern char *__builtin_strcasestr(const char *, const char *);\n");
1004         add_pre_buffer("extern char *__builtin_strnstr(const char *, const char *, __SIZE_TYPE__);\n");
1005
1006         /* And even some from <strings.h> */
1007         add_pre_buffer("extern int  __builtin_bcmp(const void *, const void *, __SIZE_TYPE__);\n");
1008         add_pre_buffer("extern void __builtin_bcopy(const void *, void *, __SIZE_TYPE__);\n");
1009         add_pre_buffer("extern void __builtin_bzero(void *, __SIZE_TYPE__);\n");
1010         add_pre_buffer("extern char*__builtin_index(const char *, int);\n");
1011         add_pre_buffer("extern char*__builtin_rindex(const char *, int);\n");
1012
1013         /* And bitwise operations.. */
1014         add_pre_buffer("extern int __builtin_clrsb(int);\n");
1015         add_pre_buffer("extern int __builtin_clrsbl(long);\n");
1016         add_pre_buffer("extern int __builtin_clrsbll(long long);\n");
1017         add_pre_buffer("extern int __builtin_clz(int);\n");
1018         add_pre_buffer("extern int __builtin_clzl(long);\n");
1019         add_pre_buffer("extern int __builtin_clzll(long long);\n");
1020         add_pre_buffer("extern int __builtin_ctz(int);\n");
1021         add_pre_buffer("extern int __builtin_ctzl(long);\n");
1022         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
1023         add_pre_buffer("extern int __builtin_ffs(int);\n");
1024         add_pre_buffer("extern int __builtin_ffsl(long);\n");
1025         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
1026         add_pre_buffer("extern int __builtin_parity(unsigned int);\n");
1027         add_pre_buffer("extern int __builtin_parityl(unsigned long);\n");
1028         add_pre_buffer("extern int __builtin_parityll(unsigned long long);\n");
1029         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
1030         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
1031         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
1032
1033         /* And byte swaps.. */
1034         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
1035         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
1036         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
1037
1038         /* And atomic memory access functions.. */
1039         add_pre_buffer("extern int __sync_fetch_and_add(void *, ...);\n");
1040         add_pre_buffer("extern int __sync_fetch_and_sub(void *, ...);\n");
1041         add_pre_buffer("extern int __sync_fetch_and_or(void *, ...);\n");
1042         add_pre_buffer("extern int __sync_fetch_and_and(void *, ...);\n");
1043         add_pre_buffer("extern int __sync_fetch_and_xor(void *, ...);\n");
1044         add_pre_buffer("extern int __sync_fetch_and_nand(void *, ...);\n");
1045         add_pre_buffer("extern int __sync_add_and_fetch(void *, ...);\n");
1046         add_pre_buffer("extern int __sync_sub_and_fetch(void *, ...);\n");
1047         add_pre_buffer("extern int __sync_or_and_fetch(void *, ...);\n");
1048         add_pre_buffer("extern int __sync_and_and_fetch(void *, ...);\n");
1049         add_pre_buffer("extern int __sync_xor_and_fetch(void *, ...);\n");
1050         add_pre_buffer("extern int __sync_nand_and_fetch(void *, ...);\n");
1051         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
1052         add_pre_buffer("extern int __sync_val_compare_and_swap(void *, ...);\n");
1053         add_pre_buffer("extern void __sync_synchronize();\n");
1054         add_pre_buffer("extern int __sync_lock_test_and_set(void *, ...);\n");
1055         add_pre_buffer("extern void __sync_lock_release(void *, ...);\n");
1056
1057         /* And some random ones.. */
1058         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
1059         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
1060         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
1061         add_pre_buffer("extern void __builtin_trap(void);\n");
1062         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
1063         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
1064         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
1065         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
1066         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
1067         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
1068         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
1069         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
1070         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
1071         add_pre_buffer("extern int  __builtin_abs(int);\n");
1072         add_pre_buffer("extern long __builtin_labs(long);\n");
1073         add_pre_buffer("extern long long __builtin_llabs(long long);\n");
1074         add_pre_buffer("extern double __builtin_fabs(double);\n");
1075         add_pre_buffer("extern __SIZE_TYPE__ __builtin_va_arg_pack_len(void);\n");
1076
1077         /* Add Blackfin-specific stuff */
1078         add_pre_buffer(
1079                 "#ifdef __bfin__\n"
1080                 "extern void __builtin_bfin_csync(void);\n"
1081                 "extern void __builtin_bfin_ssync(void);\n"
1082                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
1083                 "#endif\n"
1084         );
1085
1086         /* And some floating point stuff.. */
1087         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
1088         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
1089         add_pre_buffer("extern int __builtin_isless(float, float);\n");
1090         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
1091         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
1092         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
1093
1094         /* And some INFINITY / NAN stuff.. */
1095         add_pre_buffer("extern double __builtin_huge_val(void);\n");
1096         add_pre_buffer("extern float __builtin_huge_valf(void);\n");
1097         add_pre_buffer("extern long double __builtin_huge_vall(void);\n");
1098         add_pre_buffer("extern double __builtin_inf(void);\n");
1099         add_pre_buffer("extern float __builtin_inff(void);\n");
1100         add_pre_buffer("extern long double __builtin_infl(void);\n");
1101         add_pre_buffer("extern double __builtin_nan(const char *);\n");
1102         add_pre_buffer("extern float __builtin_nanf(const char *);\n");
1103         add_pre_buffer("extern long double __builtin_nanl(const char *);\n");
1104
1105         /* And some __FORTIFY_SOURCE ones.. */
1106         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(const void *, int);\n");
1107         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1108         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1109         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1110         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1111         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
1112         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
1113         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
1114         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
1115         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
1116         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1117         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1118         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
1119         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
1120         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
1121
1122         /* And some from <stdlib.h> */
1123         add_pre_buffer("extern void __builtin_abort(void);\n");
1124         add_pre_buffer("extern void *__builtin_calloc(__SIZE_TYPE__, __SIZE_TYPE__);\n");
1125         add_pre_buffer("extern void __builtin_exit(int);\n");
1126         add_pre_buffer("extern void *__builtin_malloc(__SIZE_TYPE__);\n");
1127         add_pre_buffer("extern void *__builtin_realloc(void *, __SIZE_TYPE__);\n");
1128         add_pre_buffer("extern void __builtin_free(void *);\n");
1129
1130         /* And some from <stdio.h> */
1131         add_pre_buffer("extern int __builtin_printf(const char *, ...);\n");
1132         add_pre_buffer("extern int __builtin_sprintf(char *, const char *, ...);\n");
1133         add_pre_buffer("extern int __builtin_snprintf(char *, __SIZE_TYPE__, const char *, ...);\n");
1134         add_pre_buffer("extern int __builtin_puts(const char *);\n");
1135         add_pre_buffer("extern int __builtin_vprintf(const char *, __builtin_va_list);\n");
1136         add_pre_buffer("extern int __builtin_vsprintf(char *, const char *, __builtin_va_list);\n");
1137         add_pre_buffer("extern int __builtin_vsnprintf(char *, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
1138 }
1139
1140 void create_builtin_stream(void)
1141 {
1142         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
1143         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
1144         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
1145
1146         /* add the multiarch include directories, if any */
1147         if (multiarch_dir && *multiarch_dir) {
1148                 add_pre_buffer("#add_system \"/usr/include/%s\"\n", multiarch_dir);
1149                 add_pre_buffer("#add_system \"/usr/local/include/%s\"\n", multiarch_dir);
1150         }
1151
1152         /* We add compiler headers path here because we have to parse
1153          * the arguments to get it, falling back to default. */
1154         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
1155         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
1156
1157         add_pre_buffer("#define __extension__\n");
1158         add_pre_buffer("#define __pragma__\n");
1159
1160         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
1161         // solaris/sparc that is really "unsigned int" and for linux/x86_64
1162         // it is "long unsigned int".  In either case we can probably
1163         // get away with this.  We need the #weak_define as cgcc will define
1164         // the right __SIZE_TYPE__.
1165         if (size_t_ctype == &ulong_ctype)
1166                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
1167         else
1168                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
1169         add_pre_buffer("#weak_define __STDC__ 1\n");
1170
1171         switch (standard)
1172         {
1173                 case STANDARD_C89:
1174                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1175                         break;
1176
1177                 case STANDARD_C94:
1178                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
1179                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1180                         break;
1181
1182                 case STANDARD_C99:
1183                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1184                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1185                         break;
1186
1187                 case STANDARD_GNU89:
1188                         break;
1189
1190                 case STANDARD_GNU99:
1191                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1192                         break;
1193
1194                 case STANDARD_C11:
1195                         add_pre_buffer("#weak_define __STRICT_ANSI__ 1\n");
1196                 case STANDARD_GNU11:
1197                         add_pre_buffer("#weak_define __STDC_NO_ATOMICS__ 1\n");
1198                         add_pre_buffer("#weak_define __STDC_NO_COMPLEX__ 1\n");
1199                         add_pre_buffer("#weak_define __STDC_NO_THREADS__ 1\n");
1200                         add_pre_buffer("#weak_define __STDC_VERSION__ 201112L\n");
1201                         break;
1202
1203                 default:
1204                         assert (0);
1205         }
1206
1207         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1208         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1209         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
1210         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
1211         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
1212         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
1213         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1214         add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1215         add_pre_buffer("#define __builtin_va_end(arg)\n");
1216         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
1217         add_pre_buffer("#define __builtin_va_arg_pack()\n");
1218
1219         /* FIXME! We need to do these as special magic macros at expansion time! */
1220         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
1221
1222         if (optimize)
1223                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
1224         if (optimize_size)
1225                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
1226 }
1227
1228 static struct symbol_list *sparse_tokenstream(struct token *token)
1229 {
1230         int builtin = token && !token->pos.stream;
1231
1232         // Preprocess the stream
1233         token = preprocess(token);
1234
1235         if (dump_macro_defs && !builtin)
1236                 dump_macro_definitions();
1237
1238         if (preprocess_only) {
1239                 while (!eof_token(token)) {
1240                         int prec = 1;
1241                         struct token *next = token->next;
1242                         const char *separator = "";
1243                         if (next->pos.whitespace)
1244                                 separator = " ";
1245                         if (next->pos.newline) {
1246                                 separator = "\n\t\t\t\t\t";
1247                                 prec = next->pos.pos;
1248                                 if (prec > 4)
1249                                         prec = 4;
1250                         }
1251                         printf("%s%.*s", show_token(token), prec, separator);
1252                         token = next;
1253                 }
1254                 putchar('\n');
1255
1256                 return NULL;
1257         }
1258
1259         // Parse the resulting C code
1260         while (!eof_token(token))
1261                 token = external_declaration(token, &translation_unit_used_list, NULL);
1262         return translation_unit_used_list;
1263 }
1264
1265 static struct symbol_list *sparse_file(const char *filename)
1266 {
1267         int fd;
1268         struct token *token;
1269
1270         if (strcmp (filename, "-") == 0) {
1271                 fd = 0;
1272         } else {
1273                 fd = open(filename, O_RDONLY);
1274                 if (fd < 0)
1275                         die("No such file: %s", filename);
1276         }
1277
1278         // Tokenize the input stream
1279         token = tokenize(filename, fd, NULL, includepath);
1280         close(fd);
1281
1282         return sparse_tokenstream(token);
1283 }
1284
1285 /*
1286  * This handles the "-include" directive etc: we're in global
1287  * scope, and all types/macros etc will affect all the following
1288  * files.
1289  *
1290  * NOTE NOTE NOTE! "#undef" of anything in this stage will
1291  * affect all subsequent files too, i.e. we can have non-local
1292  * behaviour between files!
1293  */
1294 static struct symbol_list *sparse_initial(void)
1295 {
1296         int i;
1297
1298         // Prepend any "include" file to the stream.
1299         // We're in global scope, it will affect all files!
1300         for (i = 0; i < cmdline_include_nr; i++)
1301                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1302
1303         return sparse_tokenstream(pre_buffer_begin);
1304 }
1305
1306 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1307 {
1308         char **args;
1309         struct symbol_list *list;
1310
1311         // Initialize symbol stream first, so that we can add defines etc
1312         init_symbols();
1313
1314         args = argv;
1315         for (;;) {
1316                 char *arg = *++args;
1317                 if (!arg)
1318                         break;
1319
1320                 if (arg[0] == '-' && arg[1]) {
1321                         args = handle_switch(arg+1, args);
1322                         continue;
1323                 }
1324                 add_ptr_list_notag(filelist, arg);
1325         }
1326         handle_switch_W_finalize();
1327         handle_switch_v_finalize();
1328
1329         handle_arch_finalize();
1330
1331         list = NULL;
1332         if (!ptr_list_empty(filelist)) {
1333                 // Initialize type system
1334                 init_ctype();
1335
1336                 create_builtin_stream();
1337                 predefined_macros();
1338                 if (!preprocess_only)
1339                         declare_builtin_functions();
1340
1341                 list = sparse_initial();
1342
1343                 /*
1344                  * Protect the initial token allocations, since
1345                  * they need to survive all the others
1346                  */
1347                 protect_token_alloc();
1348         }
1349         return list;
1350 }
1351
1352 struct symbol_list * sparse_keep_tokens(char *filename)
1353 {
1354         struct symbol_list *res;
1355
1356         /* Clear previous symbol list */
1357         translation_unit_used_list = NULL;
1358
1359         new_file_scope();
1360         res = sparse_file(filename);
1361
1362         /* And return it */
1363         return res;
1364 }
1365
1366
1367 struct symbol_list * __sparse(char *filename)
1368 {
1369         struct symbol_list *res;
1370
1371         res = sparse_keep_tokens(filename);
1372
1373         /* Drop the tokens for this file after parsing */
1374         clear_token_alloc();
1375
1376         /* And return it */
1377         return res;
1378 }
1379
1380 struct symbol_list * sparse(char *filename)
1381 {
1382         struct symbol_list *res = __sparse(filename);
1383
1384         if (has_error & ERROR_CURR_PHASE)
1385                 has_error = ERROR_PREV_PHASE;
1386         /* Evaluate the complete symbol list */
1387         evaluate_symbol_list(res);
1388
1389         return res;
1390 }