lib.c

   1 /*
   2  * 'sparse' library helper routines.
   3  *
   4  * Copyright (C) 2003 Transmeta Corp.
   5  *               2003-2004 Linus Torvalds
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <stdarg.h>
  28 #include <stddef.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <assert.h>
  34
  35 #include <sys/types.h>
  36
  37 #include "lib.h"
  38 #include "allocate.h"
  39 #include "token.h"
  40 #include "parse.h"
  41 #include "symbol.h"
  42 #include "expression.h"
  43 #include "scope.h"
  44 #include "linearize.h"
  45 #include "target.h"
  46 #include "version.h"
  47
  48 int verbose, optimize, optimize_size, preprocessing;
  49 int die_if_error = 0;
  50
  51 #ifndef __GNUC__
  52 # define __GNUC__ 2
  53 # define __GNUC_MINOR__ 95
  54 # define __GNUC_PATCHLEVEL__ 0
  55 #endif
  56
  57 int gcc_major = __GNUC__;
  58 int gcc_minor = __GNUC_MINOR__;
  59 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  60
  61 static const char *gcc_base_dir = GCC_BASE;
  62 static const char *multiarch_dir = MULTIARCH_TRIPLET;
  63
  64 struct token *skip_to(struct token *token, int op)
  65 {
  66         while (!match_op(token, op) && !eof_token(token))
  67                 token = token->next;
  68         return token;
  69 }
  70
  71 struct token *expect(struct token *token, int op, const char *where)
  72 {
  73         if (!match_op(token, op)) {
  74                 static struct token bad_token;
  75                 if (token != &bad_token) {
  76                         bad_token.next = token;
  77                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  78                         sparse_error(token->pos, "got %s", show_token(token));
  79                 }
  80                 if (op == ';')
  81                         return skip_to(token, op);
  82                 return &bad_token;
  83         }
  84         return token->next;
  85 }
  86
  87 unsigned int hexval(unsigned int c)
  88 {
  89         int retval = 256;
  90         switch (c) {
  91         case '0'...'9':
  92                 retval = c - '0';
  93                 break;
  94         case 'a'...'f':
  95                 retval = c - 'a' + 10;
  96                 break;
  97         case 'A'...'F':
  98                 retval = c - 'A' + 10;
  99                 break;
 100         }
 101         return retval;
 102 }
 103
 104 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
 105 {
 106         static char buffer[512];
 107         const char *name;
 108
 109         vsprintf(buffer, fmt, args);
 110         name = stream_name(pos.stream);
 111
 112         fprintf(stderr, "%s:%d:%d: %s%s\n",
 113                 name, pos.line, pos.pos, type, buffer);
 114 }
 115
 116 static int max_warnings = 100;
 117 static int show_info = 1;
 118
 119 void info(struct position pos, const char * fmt, ...)
 120 {
 121         va_list args;
 122
 123         if (!show_info)
 124                 return;
 125         va_start(args, fmt);
 126         do_warn("", pos, fmt, args);
 127         va_end(args);
 128 }
 129
 130 static void do_error(struct position pos, const char * fmt, va_list args)
 131 {
 132         static int errors = 0;
 133         die_if_error = 1;
 134         show_info = 1;
 135         /* Shut up warnings after an error */
 136         max_warnings = 0;
 137         if (errors > 100) {
 138                 static int once = 0;
 139                 show_info = 0;
 140                 if (once)
 141                         return;
 142                 fmt = "too many errors";
 143                 once = 1;
 144         }
 145
 146         do_warn("error: ", pos, fmt, args);
 147         errors++;
 148 }
 149
 150 void warning(struct position pos, const char * fmt, ...)
 151 {
 152         va_list args;
 153
 154         if (Wsparse_error) {
 155                 va_start(args, fmt);
 156                 do_error(pos, fmt, args);
 157                 va_end(args);
 158                 return;
 159         }
 160
 161         if (!max_warnings) {
 162                 show_info = 0;
 163                 return;
 164         }
 165
 166         if (!--max_warnings) {
 167                 show_info = 0;
 168                 fmt = "too many warnings";
 169         }
 170
 171         va_start(args, fmt);
 172         do_warn("warning: ", pos, fmt, args);
 173         va_end(args);
 174 }
 175
 176 void sparse_error(struct position pos, const char * fmt, ...)
 177 {
 178         va_list args;
 179         va_start(args, fmt);
 180         do_error(pos, fmt, args);
 181         va_end(args);
 182 }
 183
 184 void expression_error(struct expression *expr, const char *fmt, ...)
 185 {
 186         va_list args;
 187         va_start(args, fmt);
 188         do_error(expr->pos, fmt, args);
 189         va_end(args);
 190         expr->ctype = &bad_ctype;
 191 }
 192
 193 void error_die(struct position pos, const char * fmt, ...)
 194 {
 195         va_list args;
 196         va_start(args, fmt);
 197         do_warn("error: ", pos, fmt, args);
 198         va_end(args);
 199         exit(1);
 200 }
 201
 202 void die(const char *fmt, ...)
 203 {
 204         va_list args;
 205         static char buffer[512];
 206
 207         va_start(args, fmt);
 208         vsnprintf(buffer, sizeof(buffer), fmt, args);
 209         va_end(args);
 210
 211         fprintf(stderr, "%s\n", buffer);
 212         exit(1);
 213 }
 214
 215 static struct token *pre_buffer_begin = NULL;
 216 static struct token *pre_buffer_end = NULL;
 217
 218 int Waddress = 0;
 219 int Waddress_space = 1;
 220 int Wbitwise = 1;
 221 int Wcast_to_as = 0;
 222 int Wcast_truncate = 1;
 223 int Wcontext = 1;
 224 int Wdecl = 1;
 225 int Wdeclarationafterstatement = -1;
 226 int Wdefault_bitfield_sign = 0;
 227 int Wdesignated_init = 1;
 228 int Wdo_while = 0;
 229 int Winit_cstring = 0;
 230 int Wenum_mismatch = 1;
 231 int Wsparse_error = 0;
 232 int Wnon_pointer_null = 1;
 233 int Wold_initializer = 1;
 234 int Wone_bit_signed_bitfield = 1;
 235 int Woverride_init = 1;
 236 int Woverride_init_all = 0;
 237 int Woverride_init_whole_range = 0;
 238 int Wparen_string = 0;
 239 int Wptr_subtraction_blows = 0;
 240 int Wreturn_void = 0;
 241 int Wshadow = 0;
 242 int Wsizeof_bool = 0;
 243 int Wtautological_compare = 0;
 244 int Wtransparent_union = 0;
 245 int Wtypesign = 0;
 246 int Wundef = 0;
 247 int Wuninitialized = 1;
 248 int Wunknown_attribute = 1;
 249 int Wvla = 1;
 250
 251 int dbg_entry = 0;
 252 int dbg_dead = 0;
 253
 254 int preprocess_only;
 255
 256 static enum { STANDARD_C89,
 257               STANDARD_C94,
 258               STANDARD_C99,
 259               STANDARD_C11,
 260               STANDARD_GNU11,
 261               STANDARD_GNU89,
 262               STANDARD_GNU99, } standard = STANDARD_GNU89;
 263
 264 #define ARCH_LP32  0
 265 #define ARCH_LP64  1
 266 #define ARCH_LLP64 2
 267
 268 #ifdef __x86_64__
 269 #define ARCH_M64_DEFAULT ARCH_LP64
 270 #else
 271 #define ARCH_M64_DEFAULT ARCH_LP32
 272 #endif
 273
 274 int arch_m64 = ARCH_M64_DEFAULT;
 275 int arch_msize_long = 0;
 276
 277 #define CMDLINE_INCLUDE 20
 278 static int cmdline_include_nr = 0;
 279 static char *cmdline_include[CMDLINE_INCLUDE];
 280
 281
 282 void add_pre_buffer(const char *fmt, ...)
 283 {
 284         va_list args;
 285         unsigned int size;
 286         struct token *begin, *end;
 287         char buffer[4096];
 288
 289         va_start(args, fmt);
 290         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 291         va_end(args);
 292         begin = tokenize_buffer(buffer, size, &end);
 293         if (!pre_buffer_begin)
 294                 pre_buffer_begin = begin;
 295         if (pre_buffer_end)
 296                 pre_buffer_end->next = begin;
 297         pre_buffer_end = end;
 298 }
 299
 300 static char **handle_switch_D(char *arg, char **next)
 301 {
 302         const char *name = arg + 1;
 303         const char *value = "1";
 304
 305         if (!*name || isspace((unsigned char)*name))
 306                 die("argument to `-D' is missing");
 307
 308         for (;;) {
 309                 char c;
 310                 c = *++arg;
 311                 if (!c)
 312                         break;
 313                 if (isspace((unsigned char)c) || c == '=') {
 314                         *arg = '\0';
 315                         value = arg + 1;
 316                         break;
 317                 }
 318         }
 319         add_pre_buffer("#define %s %s\n", name, value);
 320         return next;
 321 }
 322
 323 static char **handle_switch_E(char *arg, char **next)
 324 {
 325         if (arg[1] == '\0')
 326                 preprocess_only = 1;
 327         return next;
 328 }
 329
 330 static char **handle_switch_I(char *arg, char **next)
 331 {
 332         char *path = arg+1;
 333
 334         switch (arg[1]) {
 335         case '-':
 336                 add_pre_buffer("#split_include\n");
 337                 break;
 338
 339         case '\0':      /* Plain "-I" */
 340                 path = *++next;
 341                 if (!path)
 342                         die("missing argument for -I option");
 343                 /* Fall through */
 344         default:
 345                 add_pre_buffer("#add_include \"%s/\"\n", path);
 346         }
 347         return next;
 348 }
 349
 350 static void add_cmdline_include(char *filename)
 351 {
 352         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 353                 die("too many include files for %s\n", filename);
 354         cmdline_include[cmdline_include_nr++] = filename;
 355 }
 356
 357 static char **handle_switch_i(char *arg, char **next)
 358 {
 359         if (*next && !strcmp(arg, "include"))
 360                 add_cmdline_include(*++next);
 361         else if (*next && !strcmp(arg, "imacros"))
 362                 add_cmdline_include(*++next);
 363         else if (*next && !strcmp(arg, "isystem")) {
 364                 char *path = *++next;
 365                 if (!path)
 366                         die("missing argument for -isystem option");
 367                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 368         } else if (*next && !strcmp(arg, "idirafter")) {
 369                 char *path = *++next;
 370                 if (!path)
 371                         die("missing argument for -idirafter option");
 372                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 373         }
 374         return next;
 375 }
 376
 377 static char **handle_switch_M(char *arg, char **next)
 378 {
 379         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 380                 if (!*next)
 381                         die("missing argument for -%s option", arg);
 382                 return next + 1;
 383         }
 384         return next;
 385 }
 386
 387 static char **handle_multiarch_dir(char *arg, char **next)
 388 {
 389         multiarch_dir = *++next;
 390         if (!multiarch_dir)
 391                 die("missing argument for -multiarch-dir option");
 392         return next;
 393 }
 394
 395 static char **handle_switch_m(char *arg, char **next)
 396 {
 397         if (!strcmp(arg, "m64")) {
 398                 arch_m64 = ARCH_LP64;
 399         } else if (!strcmp(arg, "m32")) {
 400                 arch_m64 = ARCH_LP32;
 401         } else if (!strcmp(arg, "msize-llp64")) {
 402                 arch_m64 = ARCH_LLP64;
 403         } else if (!strcmp(arg, "msize-long")) {
 404                 arch_msize_long = 1;
 405         } else if (!strcmp(arg, "multiarch-dir"))
 406                 return handle_multiarch_dir(arg, next);
 407         return next;
 408 }
 409
 410 static void handle_arch_m64_finalize(void)
 411 {
 412         switch (arch_m64) {
 413         case ARCH_LP32:
 414                 /* default values */
 415                 return;
 416         case ARCH_LP64:
 417                 bits_in_long = 64;
 418                 max_int_alignment = 8;
 419                 size_t_ctype = &ulong_ctype;
 420                 ssize_t_ctype = &long_ctype;
 421                 add_pre_buffer("#weak_define __LP64__ 1\n");
 422                 add_pre_buffer("#weak_define _LP64 1\n");
 423                 goto case_64bit_common;
 424         case ARCH_LLP64:
 425                 bits_in_long = 32;
 426                 max_int_alignment = 4;
 427                 size_t_ctype = &ullong_ctype;
 428                 ssize_t_ctype = &llong_ctype;
 429                 add_pre_buffer("#weak_define __LLP64__ 1\n");
 430                 goto case_64bit_common;
 431         case_64bit_common:
 432                 bits_in_pointer = 64;
 433                 pointer_alignment = 8;
 434 #ifdef __x86_64__
 435                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 436 #endif
 437                 break;
 438         }
 439 }
 440
 441 static void handle_arch_msize_long_finalize(void)
 442 {
 443         if (arch_msize_long) {
 444                 size_t_ctype = &ulong_ctype;
 445                 ssize_t_ctype = &long_ctype;
 446         }
 447 }
 448
 449 static void handle_arch_finalize(void)
 450 {
 451         handle_arch_m64_finalize();
 452         handle_arch_msize_long_finalize();
 453 }
 454
 455
 456 static char **handle_switch_o(char *arg, char **next)
 457 {
 458         if (!strcmp (arg, "o")) {       // "-o foo"
 459                 if (!*++next)
 460                         die("argument to '-o' is missing");
 461         }
 462         // else "-ofoo"
 463
 464         return next;
 465 }
 466
 467 static const struct warning {
 468         const char *name;
 469         int *flag;
 470 } warnings[] = {
 471         { "address", &Waddress },
 472         { "address-space", &Waddress_space },
 473         { "bitwise", &Wbitwise },
 474         { "cast-to-as", &Wcast_to_as },
 475         { "cast-truncate", &Wcast_truncate },
 476         { "context", &Wcontext },
 477         { "decl", &Wdecl },
 478         { "declaration-after-statement", &Wdeclarationafterstatement },
 479         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 480         { "designated-init", &Wdesignated_init },
 481         { "do-while", &Wdo_while },
 482         { "enum-mismatch", &Wenum_mismatch },
 483         { "sparse-error", &Wsparse_error },
 484         { "init-cstring", &Winit_cstring },
 485         { "non-pointer-null", &Wnon_pointer_null },
 486         { "old-initializer", &Wold_initializer },
 487         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 488         { "override-init", &Woverride_init },
 489         { "override-init-all", &Woverride_init_all },
 490         { "paren-string", &Wparen_string },
 491         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 492         { "return-void", &Wreturn_void },
 493         { "shadow", &Wshadow },
 494         { "sizeof-bool", &Wsizeof_bool },
 495         { "tautological-compare", &Wtautological_compare },
 496         { "transparent-union", &Wtransparent_union },
 497         { "typesign", &Wtypesign },
 498         { "undef", &Wundef },
 499         { "uninitialized", &Wuninitialized },
 500         { "unknown-attribute", &Wunknown_attribute },
 501         { "vla", &Wvla },
 502 };
 503
 504 enum {
 505         WARNING_OFF,
 506         WARNING_ON,
 507         WARNING_FORCE_OFF
 508 };
 509
 510
 511 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 512 {
 513         int flag = WARNING_ON;
 514         char *p = arg + 1;
 515         unsigned i;
 516
 517         if (!strcmp(p, "sparse-all")) {
 518                 for (i = 0; i < n; i++) {
 519                         if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Wsparse_error)
 520                                 *warnings[i].flag = WARNING_ON;
 521                 }
 522         }
 523
 524         // Prefixes "no" and "no-" mean to turn warning off.
 525         if (p[0] == 'n' && p[1] == 'o') {
 526                 p += 2;
 527                 if (p[0] == '-')
 528                         p++;
 529                 flag = WARNING_FORCE_OFF;
 530         }
 531
 532         for (i = 0; i < n; i++) {
 533                 if (!strcmp(p,warnings[i].name)) {
 534                         *warnings[i].flag = flag;
 535                         return next;
 536                 }
 537         }
 538
 539         // Unknown.
 540         return NULL;
 541 }
 542
 543 static char **handle_switch_W(char *arg, char **next)
 544 {
 545         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 546         if (ret)
 547                 return ret;
 548
 549         // Unknown.
 550         return next;
 551 }
 552
 553 static struct warning debugs[] = {
 554         { "entry", &dbg_entry},
 555         { "dead", &dbg_dead},
 556 };
 557
 558
 559 static char **handle_switch_v(char *arg, char **next)
 560 {
 561         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 562         if (ret)
 563                 return ret;
 564
 565         // Unknown.
 566         do {
 567                 verbose++;
 568         } while (*++arg == 'v');
 569         return next;
 570 }
 571
 572
 573 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 574 {
 575         unsigned i;
 576
 577         for (i = 0; i < n; i++) {
 578                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 579                         *warnings[i].flag = WARNING_OFF;
 580         }
 581 }
 582
 583 static void handle_switch_W_finalize(void)
 584 {
 585         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 586
 587         /* default Wdeclarationafterstatement based on the C dialect */
 588         if (-1 == Wdeclarationafterstatement)
 589         {
 590                 switch (standard)
 591                 {
 592                         case STANDARD_C89:
 593                         case STANDARD_C94:
 594                                 Wdeclarationafterstatement = 1;
 595                                 break;
 596
 597                         case STANDARD_C99:
 598                         case STANDARD_GNU89:
 599                         case STANDARD_GNU99:
 600                         case STANDARD_C11:
 601                         case STANDARD_GNU11:
 602                                 Wdeclarationafterstatement = 0;
 603                                 break;
 604
 605                         default:
 606                                 assert (0);
 607                 }
 608
 609         }
 610 }
 611
 612 static void handle_switch_v_finalize(void)
 613 {
 614         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 615 }
 616
 617 static char **handle_switch_U(char *arg, char **next)
 618 {
 619         const char *name = arg + 1;
 620         add_pre_buffer ("#undef %s\n", name);
 621         return next;
 622 }
 623
 624 static char **handle_switch_O(char *arg, char **next)
 625 {
 626         int level = 1;
 627         if (arg[1] >= '0' && arg[1] <= '9')
 628                 level = arg[1] - '0';
 629         optimize = level;
 630         optimize_size = arg[1] == 's';
 631         return next;
 632 }
 633
 634 static char **handle_switch_ftabstop(char *arg, char **next)
 635 {
 636         char *end;
 637         unsigned long val;
 638
 639         if (*arg == '\0')
 640                 die("error: missing argument to \"-ftabstop=\"");
 641
 642         /* we silently ignore silly values */
 643         val = strtoul(arg, &end, 10);
 644         if (*end == '\0' && 1 <= val && val <= 100)
 645                 tabstop = val;
 646
 647         return next;
 648 }
 649
 650 static char **handle_switch_f(char *arg, char **next)
 651 {
 652         arg++;
 653
 654         if (!strncmp(arg, "tabstop=", 8))
 655                 return handle_switch_ftabstop(arg+8, next);
 656
 657         /* handle switches w/ arguments above, boolean and only boolean below */
 658
 659         if (!strncmp(arg, "no-", 3)) {
 660                 arg += 3;
 661         }
 662         /* handle switch here.. */
 663         return next;
 664 }
 665
 666 static char **handle_switch_G(char *arg, char **next)
 667 {
 668         if (!strcmp (arg, "G") && *next)
 669                 return next + 1; // "-G 0"
 670         else
 671                 return next;     // "-G0" or (bogus) terminal "-G"
 672 }
 673
 674 static char **handle_switch_a(char *arg, char **next)
 675 {
 676         if (!strcmp (arg, "ansi"))
 677                 standard = STANDARD_C89;
 678
 679         return next;
 680 }
 681
 682 static char **handle_switch_s(char *arg, char **next)
 683 {
 684         if (!strncmp (arg, "std=", 4))
 685         {
 686                 arg += 4;
 687
 688                 if (!strcmp (arg, "c89") ||
 689                     !strcmp (arg, "iso9899:1990"))
 690                         standard = STANDARD_C89;
 691
 692                 else if (!strcmp (arg, "iso9899:199409"))
 693                         standard = STANDARD_C94;
 694
 695                 else if (!strcmp (arg, "c99") ||
 696                          !strcmp (arg, "c9x") ||
 697                          !strcmp (arg, "iso9899:1999") ||
 698                          !strcmp (arg, "iso9899:199x"))
 699                         standard = STANDARD_C99;
 700
 701                 else if (!strcmp (arg, "gnu89"))
 702                         standard = STANDARD_GNU89;
 703
 704                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 705                         standard = STANDARD_GNU99;
 706
 707                 else if (!strcmp(arg, "c11") ||
 708                          !strcmp(arg, "c1x") ||
 709                          !strcmp(arg, "iso9899:2011"))
 710                         standard = STANDARD_C11;
 711
 712                 else if (!strcmp(arg, "gnu11"))
 713                         standard = STANDARD_GNU11;
 714
 715                 else
 716                         die ("Unsupported C dialect");
 717         }
 718
 719         return next;
 720 }
 721
 722 static char **handle_nostdinc(char *arg, char **next)
 723 {
 724         add_pre_buffer("#nostdinc\n");
 725         return next;
 726 }
 727
 728 static char **handle_switch_n(char *arg, char **next)
 729 {
 730         if (!strcmp (arg, "nostdinc"))
 731                 return handle_nostdinc(arg, next);
 732
 733         return next;
 734 }
 735
 736 static char **handle_base_dir(char *arg, char **next)
 737 {
 738         gcc_base_dir = *++next;
 739         if (!gcc_base_dir)
 740                 die("missing argument for -gcc-base-dir option");
 741         return next;
 742 }
 743
 744 static char **handle_switch_g(char *arg, char **next)
 745 {
 746         if (!strcmp (arg, "gcc-base-dir"))
 747                 return handle_base_dir(arg, next);
 748
 749         return next;
 750 }
 751
 752
 753 static char **handle_version(char *arg, char **next)
 754 {
 755         printf("%s\n", SPARSE_VERSION);
 756         exit(0);
 757 }
 758
 759 static char **handle_param(char *arg, char **next)
 760 {
 761         char *value = NULL;
 762
 763         /* For now just skip any '--param=*' or '--param *' */
 764         if (*arg == '\0') {
 765                 value = *++next;
 766         } else if (isspace((unsigned char)*arg) || *arg == '=') {
 767                 value = ++arg;
 768         }
 769
 770         if (!value)
 771                 die("missing argument for --param option");
 772
 773         return next;
 774 }
 775
 776 struct switches {
 777         const char *name;
 778         char **(*fn)(char *, char **);
 779         unsigned int prefix:1;
 780 };
 781
 782 static char **handle_long_options(char *arg, char **next)
 783 {
 784         static struct switches cmd[] = {
 785                 { "param", handle_param, 1 },
 786                 { "version", handle_version },
 787                 { NULL, NULL }
 788         };
 789         struct switches *s = cmd;
 790
 791         while (s->name) {
 792                 int optlen = strlen(s->name);
 793                 if (!strncmp(s->name, arg, optlen + !s->prefix))
 794                         return s->fn(arg + optlen, next);
 795                 s++;
 796         }
 797         return next;
 798 }
 799
 800 static char **handle_switch(char *arg, char **next)
 801 {
 802         switch (*arg) {
 803         case 'a': return handle_switch_a(arg, next);
 804         case 'D': return handle_switch_D(arg, next);
 805         case 'E': return handle_switch_E(arg, next);
 806         case 'f': return handle_switch_f(arg, next);
 807         case 'g': return handle_switch_g(arg, next);
 808         case 'G': return handle_switch_G(arg, next);
 809         case 'I': return handle_switch_I(arg, next);
 810         case 'i': return handle_switch_i(arg, next);
 811         case 'M': return handle_switch_M(arg, next);
 812         case 'm': return handle_switch_m(arg, next);
 813         case 'n': return handle_switch_n(arg, next);
 814         case 'o': return handle_switch_o(arg, next);
 815         case 'O': return handle_switch_O(arg, next);
 816         case 's': return handle_switch_s(arg, next);
 817         case 'U': return handle_switch_U(arg, next);
 818         case 'v': return handle_switch_v(arg, next);
 819         case 'W': return handle_switch_W(arg, next);
 820         case '-': return handle_long_options(arg + 1, next);
 821         default:
 822                 break;
 823         }
 824
 825         /*
 826          * Ignore unknown command line options:
 827          * they're probably gcc switches
 828          */
 829         return next;
 830 }
 831
 832 static void predefined_sizeof(const char *name, unsigned bits)
 833 {
 834         add_pre_buffer("#weak_define __SIZEOF_%s__ %d\n", name, bits/8);
 835 }
 836
 837 static void predefined_type_size(const char *name, const char *suffix, unsigned bits)
 838 {
 839         unsigned long long max = (1ULL << (bits - 1 )) - 1;
 840
 841         add_pre_buffer("#weak_define __%s_MAX__ %#llx%s\n", name, max, suffix);
 842         predefined_sizeof(name, bits);
 843 }
 844
 845 static void predefined_macros(void)
 846 {
 847         add_pre_buffer("#define __CHECKER__ 1\n");
 848
 849         predefined_sizeof("SHORT", bits_in_short);
 850
 851         predefined_type_size("INT", "", bits_in_int);
 852         predefined_type_size("LONG", "L", bits_in_long);
 853         predefined_type_size("LONG_LONG", "LL", bits_in_longlong);
 854
 855         predefined_sizeof("INT128", 128);
 856
 857         predefined_sizeof("SIZE_T", bits_in_pointer);
 858         predefined_sizeof("PTRDIFF_T", bits_in_pointer);
 859         predefined_sizeof("POINTER", bits_in_pointer);
 860
 861         predefined_sizeof("FLOAT", bits_in_float);
 862         predefined_sizeof("DOUBLE", bits_in_double);
 863         predefined_sizeof("LONG_DOUBLE", bits_in_longdouble);
 864 }
 865
 866 void declare_builtin_functions(void)
 867 {
 868         /* Gaah. gcc knows tons of builtin <string.h> functions */
 869         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
 870         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
 871         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
 872         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
 873         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
 874         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
 875         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
 876         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
 877         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
 878         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
 879         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
 880         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
 881         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
 882         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
 883         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
 884
 885         /* And bitwise operations.. */
 886         add_pre_buffer("extern int __builtin_clz(int);\n");
 887         add_pre_buffer("extern int __builtin_clzl(long);\n");
 888         add_pre_buffer("extern int __builtin_clzll(long long);\n");
 889         add_pre_buffer("extern int __builtin_ctz(int);\n");
 890         add_pre_buffer("extern int __builtin_ctzl(long);\n");
 891         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
 892         add_pre_buffer("extern int __builtin_ffs(int);\n");
 893         add_pre_buffer("extern int __builtin_ffsl(long);\n");
 894         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
 895         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
 896         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
 897         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
 898
 899         /* And byte swaps.. */
 900         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
 901         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
 902         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
 903
 904         /* And atomic memory access functions.. */
 905         add_pre_buffer("extern int __sync_fetch_and_add(void *, ...);\n");
 906         add_pre_buffer("extern int __sync_fetch_and_sub(void *, ...);\n");
 907         add_pre_buffer("extern int __sync_fetch_and_or(void *, ...);\n");
 908         add_pre_buffer("extern int __sync_fetch_and_and(void *, ...);\n");
 909         add_pre_buffer("extern int __sync_fetch_and_xor(void *, ...);\n");
 910         add_pre_buffer("extern int __sync_fetch_and_nand(void *, ...);\n");
 911         add_pre_buffer("extern int __sync_add_and_fetch(void *, ...);\n");
 912         add_pre_buffer("extern int __sync_sub_and_fetch(void *, ...);\n");
 913         add_pre_buffer("extern int __sync_or_and_fetch(void *, ...);\n");
 914         add_pre_buffer("extern int __sync_and_and_fetch(void *, ...);\n");
 915         add_pre_buffer("extern int __sync_xor_and_fetch(void *, ...);\n");
 916         add_pre_buffer("extern int __sync_nand_and_fetch(void *, ...);\n");
 917         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
 918         add_pre_buffer("extern int __sync_val_compare_and_swap(void *, ...);\n");
 919         add_pre_buffer("extern void __sync_synchronize();\n");
 920         add_pre_buffer("extern int __sync_lock_test_and_set(void *, ...);\n");
 921         add_pre_buffer("extern void __sync_lock_release(void *, ...);\n");
 922
 923         /* And some random ones.. */
 924         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
 925         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
 926         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
 927         add_pre_buffer("extern void __builtin_trap(void);\n");
 928         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
 929         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
 930         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
 931         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
 932         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
 933         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
 934         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
 935         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
 936         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
 937         add_pre_buffer("extern long __builtin_labs(long);\n");
 938         add_pre_buffer("extern double __builtin_fabs(double);\n");
 939         add_pre_buffer("extern __SIZE_TYPE__ __builtin_va_arg_pack_len(void);\n");
 940
 941         /* Add Blackfin-specific stuff */
 942         add_pre_buffer(
 943                 "#ifdef __bfin__\n"
 944                 "extern void __builtin_bfin_csync(void);\n"
 945                 "extern void __builtin_bfin_ssync(void);\n"
 946                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
 947                 "#endif\n"
 948         );
 949
 950         /* And some floating point stuff.. */
 951         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
 952         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
 953         add_pre_buffer("extern int __builtin_isless(float, float);\n");
 954         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
 955         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
 956         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
 957
 958         /* And some INFINITY / NAN stuff.. */
 959         add_pre_buffer("extern double __builtin_huge_val(void);\n");
 960         add_pre_buffer("extern float __builtin_huge_valf(void);\n");
 961         add_pre_buffer("extern long double __builtin_huge_vall(void);\n");
 962         add_pre_buffer("extern double __builtin_inf(void);\n");
 963         add_pre_buffer("extern float __builtin_inff(void);\n");
 964         add_pre_buffer("extern long double __builtin_infl(void);\n");
 965         add_pre_buffer("extern double __builtin_nan(const char *);\n");
 966         add_pre_buffer("extern float __builtin_nanf(const char *);\n");
 967         add_pre_buffer("extern long double __builtin_nanl(const char *);\n");
 968
 969         /* And some __FORTIFY_SOURCE ones.. */
 970         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(const void *, int);\n");
 971         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 972         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 973         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 974         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 975         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
 976         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
 977         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 978         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
 979         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
 980         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 981         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
 982         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
 983         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
 984         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
 985 }
 986
 987 void create_builtin_stream(void)
 988 {
 989         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
 990         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
 991         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
 992
 993         /* add the multiarch include directories, if any */
 994         if (multiarch_dir && *multiarch_dir) {
 995                 add_pre_buffer("#add_system \"/usr/include/%s\"\n", multiarch_dir);
 996                 add_pre_buffer("#add_system \"/usr/local/include/%s\"\n", multiarch_dir);
 997         }
 998
 999         /* We add compiler headers path here because we have to parse
1000          * the arguments to get it, falling back to default. */
1001         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
1002         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
1003
1004         add_pre_buffer("#define __extension__\n");
1005         add_pre_buffer("#define __pragma__\n");
1006
1007         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
1008         // solaris/sparc that is really "unsigned int" and for linux/x86_64
1009         // it is "long unsigned int".  In either case we can probably
1010         // get away with this.  We need the #weak_define as cgcc will define
1011         // the right __SIZE_TYPE__.
1012         if (size_t_ctype == &ulong_ctype)
1013                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
1014         else
1015                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
1016         add_pre_buffer("#weak_define __STDC__ 1\n");
1017
1018         switch (standard)
1019         {
1020                 case STANDARD_C89:
1021                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1022                         break;
1023
1024                 case STANDARD_C94:
1025                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
1026                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1027                         break;
1028
1029                 case STANDARD_C99:
1030                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1031                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1032                         break;
1033
1034                 case STANDARD_GNU89:
1035                         break;
1036
1037                 case STANDARD_GNU99:
1038                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1039                         break;
1040
1041                 case STANDARD_C11:
1042                         add_pre_buffer("#weak_define __STRICT_ANSI__ 1\n");
1043                 case STANDARD_GNU11:
1044                         add_pre_buffer("#weak_define __STDC_NO_ATOMICS__ 1\n");
1045                         add_pre_buffer("#weak_define __STDC_NO_COMPLEX__ 1\n");
1046                         add_pre_buffer("#weak_define __STDC_NO_THREADS__ 1\n");
1047                         add_pre_buffer("#weak_define __STDC_VERSION__ 201112L\n");
1048                         break;
1049
1050                 default:
1051                         assert (0);
1052         }
1053
1054         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1055         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1056         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
1057         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
1058         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
1059         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
1060         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1061         add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1062         add_pre_buffer("#define __builtin_va_end(arg)\n");
1063         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
1064         add_pre_buffer("#define __builtin_va_arg_pack()\n");
1065
1066         /* FIXME! We need to do these as special magic macros at expansion time! */
1067         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
1068
1069         if (optimize)
1070                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
1071         if (optimize_size)
1072                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
1073
1074         /* GCC defines these for limits.h */
1075         add_pre_buffer("#weak_define __SHRT_MAX__ " STRINGIFY(__SHRT_MAX__) "\n");
1076         add_pre_buffer("#weak_define __SCHAR_MAX__ " STRINGIFY(__SCHAR_MAX__) "\n");
1077         add_pre_buffer("#weak_define __INT_MAX__ " STRINGIFY(__INT_MAX__) "\n");
1078         add_pre_buffer("#weak_define __LONG_MAX__ " STRINGIFY(__LONG_MAX__) "\n");
1079         add_pre_buffer("#weak_define __LONG_LONG_MAX__ " STRINGIFY(__LONG_LONG_MAX__) "\n");
1080         add_pre_buffer("#weak_define __WCHAR_MAX__ " STRINGIFY(__WCHAR_MAX__) "\n");
1081         add_pre_buffer("#weak_define __SIZEOF_POINTER__ " STRINGIFY(__SIZEOF_POINTER__) "\n");
1082         add_pre_buffer("#weak_define __CHAR_BIT__ " STRINGIFY(__CHAR_BIT__) "\n");
1083 }
1084
1085 static struct symbol_list *sparse_tokenstream(struct token *token)
1086 {
1087         // Preprocess the stream
1088         token = preprocess(token);
1089
1090         if (preprocess_only) {
1091                 while (!eof_token(token)) {
1092                         int prec = 1;
1093                         struct token *next = token->next;
1094                         const char *separator = "";
1095                         if (next->pos.whitespace)
1096                                 separator = " ";
1097                         if (next->pos.newline) {
1098                                 separator = "\n\t\t\t\t\t";
1099                                 prec = next->pos.pos;
1100                                 if (prec > 4)
1101                                         prec = 4;
1102                         }
1103                         printf("%s%.*s", show_token(token), prec, separator);
1104                         token = next;
1105                 }
1106                 putchar('\n');
1107
1108                 return NULL;
1109         }
1110
1111         // Parse the resulting C code
1112         while (!eof_token(token))
1113                 token = external_declaration(token, &translation_unit_used_list, NULL);
1114         return translation_unit_used_list;
1115 }
1116
1117 static struct symbol_list *sparse_file(const char *filename)
1118 {
1119         int fd;
1120         struct token *token;
1121
1122         if (strcmp (filename, "-") == 0) {
1123                 fd = 0;
1124         } else {
1125                 fd = open(filename, O_RDONLY);
1126                 if (fd < 0)
1127                         die("No such file: %s", filename);
1128         }
1129
1130         // Tokenize the input stream
1131         token = tokenize(filename, fd, NULL, includepath);
1132         close(fd);
1133
1134         return sparse_tokenstream(token);
1135 }
1136
1137 /*
1138  * This handles the "-include" directive etc: we're in global
1139  * scope, and all types/macros etc will affect all the following
1140  * files.
1141  *
1142  * NOTE NOTE NOTE! "#undef" of anything in this stage will
1143  * affect all subsequent files too, i.e. we can have non-local
1144  * behaviour between files!
1145  */
1146 static struct symbol_list *sparse_initial(void)
1147 {
1148         int i;
1149
1150         // Prepend any "include" file to the stream.
1151         // We're in global scope, it will affect all files!
1152         for (i = 0; i < cmdline_include_nr; i++)
1153                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1154
1155         return sparse_tokenstream(pre_buffer_begin);
1156 }
1157
1158 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1159 {
1160         char **args;
1161         struct symbol_list *list;
1162
1163         // Initialize symbol stream first, so that we can add defines etc
1164         init_symbols();
1165
1166         args = argv;
1167         for (;;) {
1168                 char *arg = *++args;
1169                 if (!arg)
1170                         break;
1171
1172                 if (arg[0] == '-' && arg[1]) {
1173                         args = handle_switch(arg+1, args);
1174                         continue;
1175                 }
1176                 add_ptr_list_notag(filelist, arg);
1177         }
1178         handle_switch_W_finalize();
1179         handle_switch_v_finalize();
1180
1181         handle_arch_finalize();
1182
1183         list = NULL;
1184         if (!ptr_list_empty(filelist)) {
1185                 // Initialize type system
1186                 init_ctype();
1187
1188                 create_builtin_stream();
1189                 predefined_macros();
1190                 if (!preprocess_only)
1191                         declare_builtin_functions();
1192
1193                 list = sparse_initial();
1194
1195                 /*
1196                  * Protect the initial token allocations, since
1197                  * they need to survive all the others
1198                  */
1199                 protect_token_alloc();
1200         }
1201         return list;
1202 }
1203
1204 struct symbol_list * sparse_keep_tokens(char *filename)
1205 {
1206         struct symbol_list *res;
1207
1208         /* Clear previous symbol list */
1209         translation_unit_used_list = NULL;
1210
1211         new_file_scope();
1212         res = sparse_file(filename);
1213
1214         /* And return it */
1215         return res;
1216 }
1217
1218
1219 struct symbol_list * __sparse(char *filename)
1220 {
1221         struct symbol_list *res;
1222
1223         res = sparse_keep_tokens(filename);
1224
1225         /* Drop the tokens for this file after parsing */
1226         clear_token_alloc();
1227
1228         /* And return it */
1229         return res;
1230 }
1231
1232 struct symbol_list * sparse(char *filename)
1233 {
1234         struct symbol_list *res = __sparse(filename);
1235
1236         /* Evaluate the complete symbol list */
1237         evaluate_symbol_list(res);
1238
1239         return res;
1240 }