lib.c

   1 /*
   2  * 'sparse' library helper routines.
   3  *
   4  * Copyright (C) 2003 Transmeta Corp.
   5  *               2003-2004 Linus Torvalds
   6  *
   7  *  Licensed under the Open Software License version 1.1
   8  */
   9 #include <ctype.h>
  10 #include <fcntl.h>
  11 #include <stdarg.h>
  12 #include <stddef.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <unistd.h>
  17 #include <assert.h>
  18
  19 #include <sys/types.h>
  20
  21 #include "lib.h"
  22 #include "allocate.h"
  23 #include "token.h"
  24 #include "parse.h"
  25 #include "symbol.h"
  26 #include "expression.h"
  27 #include "scope.h"
  28 #include "linearize.h"
  29 #include "target.h"
  30
  31 int verbose, optimize, optimize_size, preprocessing;
  32 int die_if_error = 0;
  33
  34 #ifndef __GNUC__
  35 # define __GNUC__ 2
  36 # define __GNUC_MINOR__ 95
  37 # define __GNUC_PATCHLEVEL__ 0
  38 #endif
  39
  40 int gcc_major = __GNUC__;
  41 int gcc_minor = __GNUC_MINOR__;
  42 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  43
  44 static const char *gcc_base_dir = GCC_BASE;
  45
  46 struct token *skip_to(struct token *token, int op)
  47 {
  48         while (!match_op(token, op) && !eof_token(token))
  49                 token = token->next;
  50         return token;
  51 }
  52
  53 struct token *expect(struct token *token, int op, const char *where)
  54 {
  55         if (!match_op(token, op)) {
  56                 static struct token bad_token;
  57                 if (token != &bad_token) {
  58                         bad_token.next = token;
  59                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  60                         sparse_error(token->pos, "got %s", show_token(token));
  61                 }
  62                 if (op == ';')
  63                         return skip_to(token, op);
  64                 return &bad_token;
  65         }
  66         return token->next;
  67 }
  68
  69 unsigned int hexval(unsigned int c)
  70 {
  71         int retval = 256;
  72         switch (c) {
  73         case '0'...'9':
  74                 retval = c - '0';
  75                 break;
  76         case 'a'...'f':
  77                 retval = c - 'a' + 10;
  78                 break;
  79         case 'A'...'F':
  80                 retval = c - 'A' + 10;
  81                 break;
  82         }
  83         return retval;
  84 }
  85
  86 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
  87 {
  88         static char buffer[512];
  89         const char *name;
  90
  91         vsprintf(buffer, fmt, args);
  92         name = stream_name(pos.stream);
  93
  94         fprintf(stderr, "%s:%d:%d: %s%s\n",
  95                 name, pos.line, pos.pos, type, buffer);
  96 }
  97
  98 static int max_warnings = 100;
  99 static int show_info = 1;
 100
 101 void info(struct position pos, const char * fmt, ...)
 102 {
 103         va_list args;
 104
 105         if (!show_info)
 106                 return;
 107         va_start(args, fmt);
 108         do_warn("", pos, fmt, args);
 109         va_end(args);
 110 }
 111
 112 void warning(struct position pos, const char * fmt, ...)
 113 {
 114         va_list args;
 115
 116         if (!max_warnings) {
 117                 show_info = 0;
 118                 return;
 119         }
 120
 121         if (!--max_warnings) {
 122                 show_info = 0;
 123                 fmt = "too many warnings";
 124         }
 125
 126         va_start(args, fmt);
 127         do_warn("warning: ", 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         max_warnings = 0;
 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 sparse_error(struct position pos, const char * fmt, ...)
 152 {
 153         va_list args;
 154         va_start(args, fmt);
 155         do_error(pos, fmt, args);
 156         va_end(args);
 157 }
 158
 159 void expression_error(struct expression *expr, const char *fmt, ...)
 160 {
 161         va_list args;
 162         va_start(args, fmt);
 163         do_error(expr->pos, fmt, args);
 164         va_end(args);
 165         expr->ctype = &bad_ctype;
 166 }
 167
 168 void error_die(struct position pos, const char * fmt, ...)
 169 {
 170         va_list args;
 171         va_start(args, fmt);
 172         do_warn("error: ", pos, fmt, args);
 173         va_end(args);
 174         exit(1);
 175 }
 176
 177 void die(const char *fmt, ...)
 178 {
 179         va_list args;
 180         static char buffer[512];
 181
 182         va_start(args, fmt);
 183         vsnprintf(buffer, sizeof(buffer), fmt, args);
 184         va_end(args);
 185
 186         fprintf(stderr, "%s\n", buffer);
 187         exit(1);
 188 }
 189
 190 static struct token *pre_buffer_begin = NULL;
 191 static struct token *pre_buffer_end = NULL;
 192
 193 int Waddress_space = 1;
 194 int Wbitwise = 0;
 195 int Wcast_to_as = 0;
 196 int Wcast_truncate = 1;
 197 int Wcontext = 1;
 198 int Wdecl = 1;
 199 int Wdefault_bitfield_sign = 0;
 200 int Wdesignated_init = 1;
 201 int Wdo_while = 0;
 202 int Wenum_mismatch = 1;
 203 int Wnon_pointer_null = 1;
 204 int Wold_initializer = 1;
 205 int Wone_bit_signed_bitfield = 1;
 206 int Wparen_string = 0;
 207 int Wptr_subtraction_blows = 0;
 208 int Wreturn_void = 0;
 209 int Wshadow = 0;
 210 int Wtransparent_union = 0;
 211 int Wtypesign = 0;
 212 int Wundef = 0;
 213 int Wuninitialized = 1;
 214 int Wdeclarationafterstatement = -1;
 215
 216 int dbg_entry = 0;
 217 int dbg_dead = 0;
 218
 219 int preprocess_only;
 220
 221 static enum { STANDARD_C89,
 222               STANDARD_C94,
 223               STANDARD_C99,
 224               STANDARD_GNU89,
 225               STANDARD_GNU99, } standard = STANDARD_GNU89;
 226
 227 #ifdef __x86_64__
 228 #define ARCH_M64_DEFAULT 1
 229 #else
 230 #define ARCH_M64_DEFAULT 0
 231 #endif
 232
 233 int arch_m64 = ARCH_M64_DEFAULT;
 234 int arch_msize_long = 0;
 235
 236 #define CMDLINE_INCLUDE 20
 237 static int cmdline_include_nr = 0;
 238 static char *cmdline_include[CMDLINE_INCLUDE];
 239
 240
 241 void add_pre_buffer(const char *fmt, ...)
 242 {
 243         va_list args;
 244         unsigned int size;
 245         struct token *begin, *end;
 246         char buffer[4096];
 247
 248         va_start(args, fmt);
 249         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 250         va_end(args);
 251         begin = tokenize_buffer(buffer, size, &end);
 252         if (!pre_buffer_begin)
 253                 pre_buffer_begin = begin;
 254         if (pre_buffer_end)
 255                 pre_buffer_end->next = begin;
 256         pre_buffer_end = end;
 257 }
 258
 259 static char **handle_switch_D(char *arg, char **next)
 260 {
 261         const char *name = arg + 1;
 262         const char *value = "1";
 263
 264         if (!*name || isspace(*name))
 265                 die("argument to `-D' is missing");
 266
 267         for (;;) {
 268                 char c;
 269                 c = *++arg;
 270                 if (!c)
 271                         break;
 272                 if (isspace((unsigned char)c) || c == '=') {
 273                         *arg = '\0';
 274                         value = arg + 1;
 275                         break;
 276                 }
 277         }
 278         add_pre_buffer("#define %s %s\n", name, value);
 279         return next;
 280 }
 281
 282 static char **handle_switch_E(char *arg, char **next)
 283 {
 284         if (arg[1] == '\0')
 285                 preprocess_only = 1;
 286         return next;
 287 }
 288
 289 static char **handle_switch_I(char *arg, char **next)
 290 {
 291         char *path = arg+1;
 292
 293         switch (arg[1]) {
 294         case '-':
 295                 add_pre_buffer("#split_include\n");
 296                 break;
 297
 298         case '\0':      /* Plain "-I" */
 299                 path = *++next;
 300                 if (!path)
 301                         die("missing argument for -I option");
 302                 /* Fall through */
 303         default:
 304                 add_pre_buffer("#add_include \"%s/\"\n", path);
 305         }
 306         return next;
 307 }
 308
 309 static void add_cmdline_include(char *filename)
 310 {
 311         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 312                 die("too many include files for %s\n", filename);
 313         cmdline_include[cmdline_include_nr++] = filename;
 314 }
 315
 316 static char **handle_switch_i(char *arg, char **next)
 317 {
 318         if (*next && !strcmp(arg, "include"))
 319                 add_cmdline_include(*++next);
 320         else if (*next && !strcmp(arg, "imacros"))
 321                 add_cmdline_include(*++next);
 322         else if (*next && !strcmp(arg, "isystem")) {
 323                 char *path = *++next;
 324                 if (!path)
 325                         die("missing argument for -isystem option");
 326                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 327         } else if (*next && !strcmp(arg, "idirafter")) {
 328                 char *path = *++next;
 329                 if (!path)
 330                         die("missing argument for -idirafter option");
 331                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 332         }
 333         return next;
 334 }
 335
 336 static char **handle_switch_M(char *arg, char **next)
 337 {
 338         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 339                 if (!*next)
 340                         die("missing argument for -%s option", arg);
 341                 return next + 1;
 342         }
 343         return next;
 344 }
 345
 346 static char **handle_switch_m(char *arg, char **next)
 347 {
 348         if (!strcmp(arg, "m64")) {
 349                 arch_m64 = 1;
 350         } else if (!strcmp(arg, "m32")) {
 351                 arch_m64 = 0;
 352         } else if (!strcmp(arg, "msize-long")) {
 353                 arch_msize_long = 1;
 354         }
 355         return next;
 356 }
 357
 358 static void handle_arch_m64_finalize(void)
 359 {
 360         if (arch_m64) {
 361                 bits_in_long = 64;
 362                 max_int_alignment = 8;
 363                 bits_in_pointer = 64;
 364                 pointer_alignment = 8;
 365                 size_t_ctype = &ulong_ctype;
 366                 ssize_t_ctype = &long_ctype;
 367 #ifdef __x86_64__
 368                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 369 #endif
 370         }
 371 }
 372
 373 static void handle_arch_msize_long_finalize(void)
 374 {
 375         if (arch_msize_long) {
 376                 size_t_ctype = &ulong_ctype;
 377                 ssize_t_ctype = &long_ctype;
 378         }
 379 }
 380
 381 static void handle_arch_finalize(void)
 382 {
 383         handle_arch_m64_finalize();
 384         handle_arch_msize_long_finalize();
 385 }
 386
 387
 388 static char **handle_switch_o(char *arg, char **next)
 389 {
 390         if (!strcmp (arg, "o")) {       // "-o foo"
 391                 if (!*++next)
 392                         die("argument to '-o' is missing");
 393         }
 394         // else "-ofoo"
 395
 396         return next;
 397 }
 398
 399 static const struct warning {
 400         const char *name;
 401         int *flag;
 402 } warnings[] = {
 403         { "address-space", &Waddress_space },
 404         { "bitwise", &Wbitwise },
 405         { "cast-to-as", &Wcast_to_as },
 406         { "cast-truncate", &Wcast_truncate },
 407         { "context", &Wcontext },
 408         { "decl", &Wdecl },
 409         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 410         { "designated-init", &Wdesignated_init },
 411         { "do-while", &Wdo_while },
 412         { "enum-mismatch", &Wenum_mismatch },
 413         { "non-pointer-null", &Wnon_pointer_null },
 414         { "old-initializer", &Wold_initializer },
 415         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 416         { "paren-string", &Wparen_string },
 417         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 418         { "return-void", &Wreturn_void },
 419         { "shadow", &Wshadow },
 420         { "transparent-union", &Wtransparent_union },
 421         { "typesign", &Wtypesign },
 422         { "undef", &Wundef },
 423         { "uninitialized", &Wuninitialized },
 424         { "declaration-after-statement", &Wdeclarationafterstatement },
 425 };
 426
 427 enum {
 428         WARNING_OFF,
 429         WARNING_ON,
 430         WARNING_FORCE_OFF
 431 };
 432
 433
 434 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 435 {
 436         int flag = WARNING_ON;
 437         char *p = arg + 1;
 438         unsigned i;
 439
 440         if (!strcmp(p, "sparse-all")) {
 441                 for (i = 0; i < n; i++) {
 442                         if (*warnings[i].flag != WARNING_FORCE_OFF)
 443                                 *warnings[i].flag = WARNING_ON;
 444                 }
 445         }
 446
 447         // Prefixes "no" and "no-" mean to turn warning off.
 448         if (p[0] == 'n' && p[1] == 'o') {
 449                 p += 2;
 450                 if (p[0] == '-')
 451                         p++;
 452                 flag = WARNING_FORCE_OFF;
 453         }
 454
 455         for (i = 0; i < n; i++) {
 456                 if (!strcmp(p,warnings[i].name)) {
 457                         *warnings[i].flag = flag;
 458                         return next;
 459                 }
 460         }
 461
 462         // Unknown.
 463         return NULL;
 464 }
 465
 466 static char **handle_switch_W(char *arg, char **next)
 467 {
 468         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 469         if (ret)
 470                 return ret;
 471
 472         // Unknown.
 473         return next;
 474 }
 475
 476 static struct warning debugs[] = {
 477         { "entry", &dbg_entry},
 478         { "dead", &dbg_dead},
 479 };
 480
 481
 482 static char **handle_switch_v(char *arg, char **next)
 483 {
 484         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 485         if (ret)
 486                 return ret;
 487
 488         // Unknown.
 489         do {
 490                 verbose++;
 491         } while (*++arg == 'v');
 492         return next;
 493 }
 494
 495
 496 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 497 {
 498         unsigned i;
 499
 500         for (i = 0; i < n; i++) {
 501                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 502                         *warnings[i].flag = WARNING_OFF;
 503         }
 504 }
 505
 506 static void handle_switch_W_finalize(void)
 507 {
 508         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 509
 510         /* default Wdeclarationafterstatement based on the C dialect */
 511         if (-1 == Wdeclarationafterstatement)
 512         {
 513                 switch (standard)
 514                 {
 515                         case STANDARD_C89:
 516                         case STANDARD_C94:
 517                                 Wdeclarationafterstatement = 1;
 518                                 break;
 519
 520                         case STANDARD_C99:
 521                         case STANDARD_GNU89:
 522                         case STANDARD_GNU99:
 523                                 Wdeclarationafterstatement = 0;
 524                                 break;
 525
 526                         default:
 527                                 assert (0);
 528                 }
 529
 530         }
 531 }
 532
 533 static void handle_switch_v_finalize(void)
 534 {
 535         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 536 }
 537
 538 static char **handle_switch_U(char *arg, char **next)
 539 {
 540         const char *name = arg + 1;
 541         add_pre_buffer ("#undef %s\n", name);
 542         return next;
 543 }
 544
 545 static char **handle_switch_O(char *arg, char **next)
 546 {
 547         int level = 1;
 548         if (arg[1] >= '0' && arg[1] <= '9')
 549                 level = arg[1] - '0';
 550         optimize = level;
 551         optimize_size = arg[1] == 's';
 552         return next;
 553 }
 554
 555 static char **handle_switch_ftabstop(char *arg, char **next)
 556 {
 557         char *end;
 558         unsigned long val;
 559
 560         if (*arg == '\0')
 561                 die("error: missing argument to \"-ftabstop=\"");
 562
 563         /* we silently ignore silly values */
 564         val = strtoul(arg, &end, 10);
 565         if (*end == '\0' && 1 <= val && val <= 100)
 566                 tabstop = val;
 567
 568         return next;
 569 }
 570
 571 static char **handle_switch_f(char *arg, char **next)
 572 {
 573         arg++;
 574
 575         if (!strncmp(arg, "tabstop=", 8))
 576                 return handle_switch_ftabstop(arg+8, next);
 577
 578         /* handle switches w/ arguments above, boolean and only boolean below */
 579
 580         if (!strncmp(arg, "no-", 3)) {
 581                 arg += 3;
 582         }
 583         /* handle switch here.. */
 584         return next;
 585 }
 586
 587 static char **handle_switch_G(char *arg, char **next)
 588 {
 589         if (!strcmp (arg, "G") && *next)
 590                 return next + 1; // "-G 0"
 591         else
 592                 return next;     // "-G0" or (bogus) terminal "-G"
 593 }
 594
 595 static char **handle_switch_a(char *arg, char **next)
 596 {
 597         if (!strcmp (arg, "ansi"))
 598                 standard = STANDARD_C89;
 599
 600         return next;
 601 }
 602
 603 static char **handle_switch_s(char *arg, char **next)
 604 {
 605         if (!strncmp (arg, "std=", 4))
 606         {
 607                 arg += 4;
 608
 609                 if (!strcmp (arg, "c89") ||
 610                     !strcmp (arg, "iso9899:1990"))
 611                         standard = STANDARD_C89;
 612
 613                 else if (!strcmp (arg, "iso9899:199409"))
 614                         standard = STANDARD_C94;
 615
 616                 else if (!strcmp (arg, "c99") ||
 617                          !strcmp (arg, "c9x") ||
 618                          !strcmp (arg, "iso9899:1999") ||
 619                          !strcmp (arg, "iso9899:199x"))
 620                         standard = STANDARD_C99;
 621
 622                 else if (!strcmp (arg, "gnu89"))
 623                         standard = STANDARD_GNU89;
 624
 625                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 626                         standard = STANDARD_GNU99;
 627
 628                 else
 629                         die ("Unsupported C dialect");
 630         }
 631
 632         return next;
 633 }
 634
 635 static char **handle_nostdinc(char *arg, char **next)
 636 {
 637         add_pre_buffer("#nostdinc\n");
 638         return next;
 639 }
 640
 641 static char **handle_base_dir(char *arg, char **next)
 642 {
 643         gcc_base_dir = *++next;
 644         if (!gcc_base_dir)
 645                 die("missing argument for -gcc-base-dir option");
 646         return next;
 647 }
 648
 649 struct switches {
 650         const char *name;
 651         char **(*fn)(char *, char **);
 652 };
 653
 654 static char **handle_switch(char *arg, char **next)
 655 {
 656         static struct switches cmd[] = {
 657                 { "nostdinc", handle_nostdinc },
 658                 { "gcc-base-dir", handle_base_dir},
 659                 { NULL, NULL }
 660         };
 661         struct switches *s;
 662
 663         switch (*arg) {
 664         case 'D': return handle_switch_D(arg, next);
 665         case 'E': return handle_switch_E(arg, next);
 666         case 'I': return handle_switch_I(arg, next);
 667         case 'i': return handle_switch_i(arg, next);
 668         case 'M': return handle_switch_M(arg, next);
 669         case 'm': return handle_switch_m(arg, next);
 670         case 'o': return handle_switch_o(arg, next);
 671         case 'U': return handle_switch_U(arg, next);
 672         case 'v': return handle_switch_v(arg, next);
 673         case 'W': return handle_switch_W(arg, next);
 674         case 'O': return handle_switch_O(arg, next);
 675         case 'f': return handle_switch_f(arg, next);
 676         case 'G': return handle_switch_G(arg, next);
 677         case 'a': return handle_switch_a(arg, next);
 678         case 's': return handle_switch_s(arg, next);
 679         default:
 680                 break;
 681         }
 682
 683         s = cmd;
 684         while (s->name) {
 685                 if (!strcmp(s->name, arg))
 686                         return s->fn(arg, next);
 687                 s++;
 688         }
 689
 690         /*
 691          * Ignore unknown command line options:
 692          * they're probably gcc switches
 693          */
 694         return next;
 695 }
 696
 697 void declare_builtin_functions(void)
 698 {
 699         /* Gaah. gcc knows tons of builtin <string.h> functions */
 700         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 701         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 702         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 703         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 704         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 705         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 706         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 707         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 708         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 709         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 710         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 711         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 712         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 713         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
 714         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 715
 716         /* And bitwise operations.. */
 717         add_pre_buffer("extern int __builtin_clz(int);\n");
 718         add_pre_buffer("extern int __builtin_clzl(long);\n");
 719         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 720         add_pre_buffer("extern int __builtin_ctz(int);\n");
 721         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 722         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 723         add_pre_buffer("extern int __builtin_ffs(int);\n");
 724         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 725         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 726         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 727         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 728         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 729
 730         /* And byte swaps.. */
 731         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
 732         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
 733         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
 734
 735         /* And some random ones.. */
 736         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 737         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 738         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 739         add_pre_buffer("extern void __builtin_trap(void);\n");
 740         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 741         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 742         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 743         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 744         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 745         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 746         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 747         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 748         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 749         add_pre_buffer("extern long __builtin_labs(long);\n");
 750         add_pre_buffer("extern double __builtin_fabs(double);\n");
 751         add_pre_buffer("extern void __sync_synchronize();\n");
 752         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
 753
 754         /* Add Blackfin-specific stuff */
 755         add_pre_buffer(
 756                 "#ifdef __bfin__\n"
 757                 "extern void __builtin_bfin_csync(void);\n"
 758                 "extern void __builtin_bfin_ssync(void);\n"
 759                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
 760                 "#endif\n"
 761         );
 762
 763         /* And some floating point stuff.. */
 764         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 765         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 766         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 767         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 768         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 769         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 770
 771         /* And some __FORTIFY_SOURCE ones.. */
 772         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(void *, int);\n");
 773         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 774         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 775         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 776         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 777         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 778         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 779         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 780         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 781         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 782         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 783         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 784         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 785         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 786         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
 787 }
 788
 789 void create_builtin_stream(void)
 790 {
 791         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 792         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 793         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 794
 795         /* We add compiler headers path here because we have to parse
 796          * the arguments to get it, falling back to default. */
 797         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
 798         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
 799
 800         add_pre_buffer("#define __extension__\n");
 801         add_pre_buffer("#define __pragma__\n");
 802
 803         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
 804         // solaris/sparc that is really "unsigned int" and for linux/x86_64
 805         // it is "long unsigned int".  In either case we can probably
 806         // get away with this.  We need the #weak_define as cgcc will define
 807         // the right __SIZE_TYPE__.
 808         if (size_t_ctype == &ulong_ctype)
 809                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
 810         else
 811                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
 812         add_pre_buffer("#weak_define __STDC__ 1\n");
 813
 814         switch (standard)
 815         {
 816                 case STANDARD_C89:
 817                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 818                         break;
 819
 820                 case STANDARD_C94:
 821                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
 822                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 823                         break;
 824
 825                 case STANDARD_C99:
 826                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 827                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
 828                         break;
 829
 830                 case STANDARD_GNU89:
 831                         break;
 832
 833                 case STANDARD_GNU99:
 834                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
 835                         break;
 836
 837                 default:
 838                         assert (0);
 839         }
 840
 841         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 842         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
 843         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
 844         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
 845         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
 846         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
 847         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
 848         add_pre_buffer("#define __builtin_va_end(arg)\n");
 849         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
 850
 851         /* FIXME! We need to do these as special magic macros at expansion time! */
 852         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
 853
 854         if (optimize)
 855                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
 856         if (optimize_size)
 857                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
 858
 859         /* GCC defines these for limits.h */
 860         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
 861         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
 862         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
 863         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
 864         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
 865         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
 866 }
 867
 868 static struct symbol_list *sparse_tokenstream(struct token *token)
 869 {
 870         // Preprocess the stream
 871         token = preprocess(token);
 872
 873         if (preprocess_only) {
 874                 while (!eof_token(token)) {
 875                         int prec = 1;
 876                         struct token *next = token->next;
 877                         const char *separator = "";
 878                         if (next->pos.whitespace)
 879                                 separator = " ";
 880                         if (next->pos.newline) {
 881                                 separator = "\n\t\t\t\t\t";
 882                                 prec = next->pos.pos;
 883                                 if (prec > 4)
 884                                         prec = 4;
 885                         }
 886                         printf("%s%.*s", show_token(token), prec, separator);
 887                         token = next;
 888                 }
 889                 putchar('\n');
 890
 891                 return NULL;
 892         }
 893
 894         // Parse the resulting C code
 895         while (!eof_token(token))
 896                 token = external_declaration(token, &translation_unit_used_list);
 897         return translation_unit_used_list;
 898 }
 899
 900 static struct symbol_list *sparse_file(const char *filename)
 901 {
 902         int fd;
 903         struct token *token;
 904
 905         if (strcmp (filename, "-") == 0) {
 906                 fd = 0;
 907         } else {
 908                 fd = open(filename, O_RDONLY);
 909                 if (fd < 0)
 910                         die("No such file: %s", filename);
 911         }
 912
 913         // Tokenize the input stream
 914         token = tokenize(filename, fd, NULL, includepath);
 915         close(fd);
 916
 917         return sparse_tokenstream(token);
 918 }
 919
 920 /*
 921  * This handles the "-include" directive etc: we're in global
 922  * scope, and all types/macros etc will affect all the following
 923  * files.
 924  *
 925  * NOTE NOTE NOTE! "#undef" of anything in this stage will
 926  * affect all subsequent files too, i.e. we can have non-local
 927  * behaviour between files!
 928  */
 929 static struct symbol_list *sparse_initial(void)
 930 {
 931         int i;
 932
 933         // Prepend any "include" file to the stream.
 934         // We're in global scope, it will affect all files!
 935         for (i = 0; i < cmdline_include_nr; i++)
 936                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
 937
 938         return sparse_tokenstream(pre_buffer_begin);
 939 }
 940
 941 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
 942 {
 943         char **args;
 944         struct symbol_list *list;
 945
 946         // Initialize symbol stream first, so that we can add defines etc
 947         init_symbols();
 948
 949         args = argv;
 950         for (;;) {
 951                 char *arg = *++args;
 952                 if (!arg)
 953                         break;
 954
 955                 if (arg[0] == '-' && arg[1]) {
 956                         args = handle_switch(arg+1, args);
 957                         continue;
 958                 }
 959                 add_ptr_list_notag(filelist, arg);
 960         }
 961         handle_switch_W_finalize();
 962         handle_switch_v_finalize();
 963
 964         handle_arch_finalize();
 965
 966         list = NULL;
 967         if (!ptr_list_empty(filelist)) {
 968                 // Initialize type system
 969                 init_ctype();
 970
 971                 create_builtin_stream();
 972                 add_pre_buffer("#define __CHECKER__ 1\n");
 973                 if (!preprocess_only)
 974                         declare_builtin_functions();
 975
 976                 list = sparse_initial();
 977
 978                 /*
 979                  * Protect the initial token allocations, since
 980                  * they need to survive all the others
 981                  */
 982                 protect_token_alloc();
 983         }
 984         return list;
 985 }
 986
 987 struct symbol_list * sparse_keep_tokens(char *filename)
 988 {
 989         struct symbol_list *res;
 990
 991         /* Clear previous symbol list */
 992         translation_unit_used_list = NULL;
 993
 994         new_file_scope();
 995         res = sparse_file(filename);
 996
 997         /* And return it */
 998         return res;
 999 }
1000
1001
1002 struct symbol_list * __sparse(char *filename)
1003 {
1004         struct symbol_list *res;
1005
1006         res = sparse_keep_tokens(filename);
1007
1008         /* Drop the tokens for this file after parsing */
1009         clear_token_alloc();
1010
1011         /* And return it */
1012         return res;
1013 }
1014
1015 struct symbol_list * sparse(char *filename)
1016 {
1017         struct symbol_list *res = __sparse(filename);
1018
1019         /* Evaluate the complete symbol list */
1020         evaluate_symbol_list(res);
1021
1022         return res;
1023 }