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