libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 #ifdef CONFIG_TCC_BACKTRACE
  36 ST_DATA int num_callers = 6;
  37 ST_DATA const char **rt_bound_error_msg;
  38 ST_DATA void *rt_prog_main;
  39 #endif
  40
  41 /********************************************************/
  42
  43 #ifndef NOTALLINONE
  44 #include "tccpp.c"
  45 #include "tccgen.c"
  46 #include "tccelf.c"
  47 #include "tccrun.c"
  48 #ifdef TCC_TARGET_I386
  49 #include "i386-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_ARM
  52 #include "arm-gen.c"
  53 #endif
  54 #ifdef TCC_TARGET_C67
  55 #include "c67-gen.c"
  56 #endif
  57 #ifdef TCC_TARGET_X86_64
  58 #include "x86_64-gen.c"
  59 #endif
  60 #ifdef CONFIG_TCC_ASM
  61 #include "tccasm.c"
  62 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  63 #include "i386-asm.c"
  64 #endif
  65 #endif
  66 #ifdef TCC_TARGET_COFF
  67 #include "tcccoff.c"
  68 #endif
  69 #ifdef TCC_TARGET_PE
  70 #include "tccpe.c"
  71 #endif
  72 #endif /* ALL_IN_ONE */
  73
  74 /********************************************************/
  75 #ifndef CONFIG_TCC_ASM
  76 ST_FUNC void asm_instr(void)
  77 {
  78     error("inline asm() not supported");
  79 }
  80 ST_FUNC void asm_global_instr(void)
  81 {
  82     error("inline asm() not supported");
  83 }
  84 #endif
  85
  86 /********************************************************/
  87
  88 #ifdef _WIN32
  89 static char *normalize_slashes(char *path)
  90 {
  91     char *p;
  92     for (p = path; *p; ++p)
  93         if (*p == '\\')
  94             *p = '/';
  95     return path;
  96 }
  97
  98 static HMODULE tcc_module;
  99
 100 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 101 static void tcc_set_lib_path_w32(TCCState *s)
 102 {
 103     char path[1024], *p;
 104     GetModuleFileNameA(tcc_module, path, sizeof path);
 105     p = tcc_basename(normalize_slashes(strlwr(path)));
 106     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 107         p -= 5;
 108     else if (p > path)
 109         p--;
 110     *p = 0;
 111     tcc_set_lib_path(s, path);
 112 }
 113
 114 #ifndef CONFIG_TCC_STATIC
 115 void dlclose(void *p)
 116 {
 117     FreeLibrary((HMODULE)p);
 118 }
 119 #endif
 120
 121 #ifdef LIBTCC_AS_DLL
 122 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 123 {
 124     if (DLL_PROCESS_ATTACH == dwReason)
 125         tcc_module = hDll;
 126     return TRUE;
 127 }
 128 #endif
 129 #endif
 130
 131 /********************************************************/
 132 /* copy a string and truncate it. */
 133 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 134 {
 135     char *q, *q_end;
 136     int c;
 137
 138     if (buf_size > 0) {
 139         q = buf;
 140         q_end = buf + buf_size - 1;
 141         while (q < q_end) {
 142             c = *s++;
 143             if (c == '\0')
 144                 break;
 145             *q++ = c;
 146         }
 147         *q = '\0';
 148     }
 149     return buf;
 150 }
 151
 152 /* strcat and truncate. */
 153 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 154 {
 155     int len;
 156     len = strlen(buf);
 157     if (len < buf_size)
 158         pstrcpy(buf + len, buf_size - len, s);
 159     return buf;
 160 }
 161
 162 /* extract the basename of a file */
 163 PUB_FUNC char *tcc_basename(const char *name)
 164 {
 165     char *p = strchr(name, 0);
 166     while (p > name && !IS_PATHSEP(p[-1]))
 167         --p;
 168     return p;
 169 }
 170
 171 PUB_FUNC char *tcc_fileextension (const char *name)
 172 {
 173     char *b = tcc_basename(name);
 174     char *e = strrchr(b, '.');
 175     return e ? e : strchr(b, 0);
 176 }
 177
 178 /********************************************************/
 179 /* memory management */
 180
 181 #undef free
 182 #undef malloc
 183 #undef realloc
 184
 185 #ifdef MEM_DEBUG
 186 int mem_cur_size;
 187 int mem_max_size;
 188 unsigned malloc_usable_size(void*);
 189 #endif
 190
 191 PUB_FUNC void tcc_free(void *ptr)
 192 {
 193 #ifdef MEM_DEBUG
 194     mem_cur_size -= malloc_usable_size(ptr);
 195 #endif
 196     free(ptr);
 197 }
 198
 199 PUB_FUNC void *tcc_malloc(unsigned long size)
 200 {
 201     void *ptr;
 202     ptr = malloc(size);
 203     if (!ptr && size)
 204         error("memory full");
 205 #ifdef MEM_DEBUG
 206     mem_cur_size += malloc_usable_size(ptr);
 207     if (mem_cur_size > mem_max_size)
 208         mem_max_size = mem_cur_size;
 209 #endif
 210     return ptr;
 211 }
 212
 213 PUB_FUNC void *tcc_mallocz(unsigned long size)
 214 {
 215     void *ptr;
 216     ptr = tcc_malloc(size);
 217     memset(ptr, 0, size);
 218     return ptr;
 219 }
 220
 221 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 222 {
 223     void *ptr1;
 224 #ifdef MEM_DEBUG
 225     mem_cur_size -= malloc_usable_size(ptr);
 226 #endif
 227     ptr1 = realloc(ptr, size);
 228 #ifdef MEM_DEBUG
 229     /* NOTE: count not correct if alloc error, but not critical */
 230     mem_cur_size += malloc_usable_size(ptr1);
 231     if (mem_cur_size > mem_max_size)
 232         mem_max_size = mem_cur_size;
 233 #endif
 234     return ptr1;
 235 }
 236
 237 PUB_FUNC char *tcc_strdup(const char *str)
 238 {
 239     char *ptr;
 240     ptr = tcc_malloc(strlen(str) + 1);
 241     strcpy(ptr, str);
 242     return ptr;
 243 }
 244
 245 PUB_FUNC void tcc_memstats(void)
 246 {
 247 #ifdef MEM_DEBUG
 248     printf("memory in use: %d\n", mem_cur_size);
 249 #endif
 250 }
 251
 252 #define free(p) use_tcc_free(p)
 253 #define malloc(s) use_tcc_malloc(s)
 254 #define realloc(p, s) use_tcc_realloc(p, s)
 255
 256 /********************************************************/
 257 /* dynarrays */
 258
 259 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 260 {
 261     int nb, nb_alloc;
 262     void **pp;
 263
 264     nb = *nb_ptr;
 265     pp = *ptab;
 266     /* every power of two we double array size */
 267     if ((nb & (nb - 1)) == 0) {
 268         if (!nb)
 269             nb_alloc = 1;
 270         else
 271             nb_alloc = nb * 2;
 272         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 273         if (!pp)
 274             error("memory full");
 275         *ptab = pp;
 276     }
 277     pp[nb++] = data;
 278     *nb_ptr = nb;
 279 }
 280
 281 PUB_FUNC void dynarray_reset(void *pp, int *n)
 282 {
 283     void **p;
 284     for (p = *(void***)pp; *n; ++p, --*n)
 285         if (*p)
 286             tcc_free(*p);
 287     tcc_free(*(void**)pp);
 288     *(void**)pp = NULL;
 289 }
 290
 291 /* we use our own 'finite' function to avoid potential problems with
 292    non standard math libs */
 293 /* XXX: endianness dependent */
 294 ST_FUNC int ieee_finite(double d)
 295 {
 296     int *p = (int *)&d;
 297     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 298 }
 299
 300 /********************************************************/
 301
 302 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 303 {
 304     Section *sec;
 305
 306     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 307     strcpy(sec->name, name);
 308     sec->sh_type = sh_type;
 309     sec->sh_flags = sh_flags;
 310     switch(sh_type) {
 311     case SHT_HASH:
 312     case SHT_REL:
 313     case SHT_RELA:
 314     case SHT_DYNSYM:
 315     case SHT_SYMTAB:
 316     case SHT_DYNAMIC:
 317         sec->sh_addralign = 4;
 318         break;
 319     case SHT_STRTAB:
 320         sec->sh_addralign = 1;
 321         break;
 322     default:
 323         sec->sh_addralign = 32; /* default conservative alignment */
 324         break;
 325     }
 326
 327     if (sh_flags & SHF_PRIVATE) {
 328         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 329     } else {
 330         sec->sh_num = s1->nb_sections;
 331         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 332     }
 333
 334     return sec;
 335 }
 336
 337 static void free_section(Section *s)
 338 {
 339     tcc_free(s->data);
 340 }
 341
 342 /* realloc section and set its content to zero */
 343 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 344 {
 345     unsigned long size;
 346     unsigned char *data;
 347
 348     size = sec->data_allocated;
 349     if (size == 0)
 350         size = 1;
 351     while (size < new_size)
 352         size = size * 2;
 353     data = tcc_realloc(sec->data, size);
 354     if (!data)
 355         error("memory full");
 356     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 357     sec->data = data;
 358     sec->data_allocated = size;
 359 }
 360
 361 /* reserve at least 'size' bytes in section 'sec' from
 362    sec->data_offset. */
 363 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 364 {
 365     unsigned long offset, offset1;
 366
 367     offset = sec->data_offset;
 368     offset1 = offset + size;
 369     if (offset1 > sec->data_allocated)
 370         section_realloc(sec, offset1);
 371     sec->data_offset = offset1;
 372     return sec->data + offset;
 373 }
 374
 375 /* return a reference to a section, and create it if it does not
 376    exists */
 377 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 378 {
 379     Section *sec;
 380     int i;
 381     for(i = 1; i < s1->nb_sections; i++) {
 382         sec = s1->sections[i];
 383         if (!strcmp(name, sec->name))
 384             return sec;
 385     }
 386     /* sections are created as PROGBITS */
 387     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 388 }
 389
 390 /* update sym->c so that it points to an external symbol in section
 391    'section' with value 'value' */
 392 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 393                             unsigned long value, unsigned long size,
 394                             int can_add_underscore)
 395 {
 396     int sym_type, sym_bind, sh_num, info, other;
 397     ElfW(Sym) *esym;
 398     const char *name;
 399     char buf1[256];
 400
 401     if (section == NULL)
 402         sh_num = SHN_UNDEF;
 403     else if (section == SECTION_ABS)
 404         sh_num = SHN_ABS;
 405     else
 406         sh_num = section->sh_num;
 407
 408     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 409         sym_type = STT_FUNC;
 410     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 411         sym_type = STT_NOTYPE;
 412     } else {
 413         sym_type = STT_OBJECT;
 414     }
 415
 416     if (sym->type.t & VT_STATIC)
 417         sym_bind = STB_LOCAL;
 418     else
 419         sym_bind = STB_GLOBAL;
 420
 421     if (!sym->c) {
 422         name = get_tok_str(sym->v, NULL);
 423 #ifdef CONFIG_TCC_BCHECK
 424         if (tcc_state->do_bounds_check) {
 425             char buf[32];
 426
 427             /* XXX: avoid doing that for statics ? */
 428             /* if bound checking is activated, we change some function
 429                names by adding the "__bound" prefix */
 430             switch(sym->v) {
 431 #ifdef TCC_TARGET_PE
 432             /* XXX: we rely only on malloc hooks */
 433             case TOK_malloc:
 434             case TOK_free:
 435             case TOK_realloc:
 436             case TOK_memalign:
 437             case TOK_calloc:
 438 #endif
 439             case TOK_memcpy:
 440             case TOK_memmove:
 441             case TOK_memset:
 442             case TOK_strlen:
 443             case TOK_strcpy:
 444             case TOK_alloca:
 445                 strcpy(buf, "__bound_");
 446                 strcat(buf, name);
 447                 name = buf;
 448                 break;
 449             }
 450         }
 451 #endif
 452         other = 0;
 453
 454 #ifdef TCC_TARGET_PE
 455         if (sym->type.t & VT_EXPORT)
 456             other |= 1;
 457         if (sym_type == STT_FUNC && sym->type.ref) {
 458             int attr = sym->type.ref->r;
 459             if (FUNC_EXPORT(attr))
 460                 other |= 1;
 461             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 462                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 463                 name = buf1;
 464                 other |= 2;
 465                 can_add_underscore = 0;
 466             }
 467         } else {
 468             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 469                 other |= 4;
 470             if (sym->type.t & VT_IMPORT)
 471                 other |= 4;
 472         }
 473 #endif
 474         if (tcc_state->leading_underscore && can_add_underscore) {
 475             buf1[0] = '_';
 476             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 477             name = buf1;
 478         }
 479         info = ELFW(ST_INFO)(sym_bind, sym_type);
 480         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 481     } else {
 482         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 483         esym->st_value = value;
 484         esym->st_size = size;
 485         esym->st_shndx = sh_num;
 486     }
 487 }
 488
 489 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 490                            unsigned long value, unsigned long size)
 491 {
 492     put_extern_sym2(sym, section, value, size, 1);
 493 }
 494
 495 /* add a new relocation entry to symbol 'sym' in section 's' */
 496 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 497 {
 498     int c = 0;
 499     if (sym) {
 500         if (0 == sym->c)
 501             put_extern_sym(sym, NULL, 0, 0);
 502         c = sym->c;
 503     }
 504     /* now we can add ELF relocation info */
 505     put_elf_reloc(symtab_section, s, offset, type, c);
 506 }
 507
 508 /********************************************************/
 509
 510 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 511 {
 512     int len;
 513     len = strlen(buf);
 514     vsnprintf(buf + len, buf_size - len, fmt, ap);
 515 }
 516
 517 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 518 {
 519     va_list ap;
 520     va_start(ap, fmt);
 521     strcat_vprintf(buf, buf_size, fmt, ap);
 522     va_end(ap);
 523 }
 524
 525 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 526 {
 527     char buf[2048];
 528     BufferedFile **f;
 529
 530     buf[0] = '\0';
 531     if (file) {
 532         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 533             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 534                           (*f)->filename, (*f)->line_num);
 535         if (file->line_num > 0) {
 536             strcat_printf(buf, sizeof(buf),
 537                           "%s:%d: ", file->filename, file->line_num);
 538         } else {
 539             strcat_printf(buf, sizeof(buf),
 540                           "%s: ", file->filename);
 541         }
 542     } else {
 543         strcat_printf(buf, sizeof(buf),
 544                       "tcc: ");
 545     }
 546     if (is_warning)
 547         strcat_printf(buf, sizeof(buf), "warning: ");
 548     else
 549         strcat_printf(buf, sizeof(buf), "error: ");
 550     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 551
 552     if (!s1->error_func) {
 553         /* default case: stderr */
 554         fprintf(stderr, "%s\n", buf);
 555     } else {
 556         s1->error_func(s1->error_opaque, buf);
 557     }
 558     if (!is_warning || s1->warn_error)
 559         s1->nb_errors++;
 560 }
 561
 562 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 563                         void (*error_func)(void *opaque, const char *msg))
 564 {
 565     s->error_opaque = error_opaque;
 566     s->error_func = error_func;
 567 }
 568
 569 /* error without aborting current compilation */
 570 PUB_FUNC void error_noabort(const char *fmt, ...)
 571 {
 572     TCCState *s1 = tcc_state;
 573     va_list ap;
 574
 575     va_start(ap, fmt);
 576     error1(s1, 0, fmt, ap);
 577     va_end(ap);
 578 }
 579
 580 PUB_FUNC void error(const char *fmt, ...)
 581 {
 582     TCCState *s1 = tcc_state;
 583     va_list ap;
 584
 585     va_start(ap, fmt);
 586     error1(s1, 0, fmt, ap);
 587     va_end(ap);
 588     /* better than nothing: in some cases, we accept to handle errors */
 589     if (s1->error_set_jmp_enabled) {
 590         longjmp(s1->error_jmp_buf, 1);
 591     } else {
 592         /* XXX: eliminate this someday */
 593         exit(1);
 594     }
 595 }
 596
 597 PUB_FUNC void expect(const char *msg)
 598 {
 599     error("%s expected", msg);
 600 }
 601
 602 PUB_FUNC void warning(const char *fmt, ...)
 603 {
 604     TCCState *s1 = tcc_state;
 605     va_list ap;
 606
 607     if (s1->warn_none)
 608         return;
 609
 610     va_start(ap, fmt);
 611     error1(s1, 1, fmt, ap);
 612     va_end(ap);
 613 }
 614
 615 /********************************************************/
 616 /* I/O layer */
 617
 618 ST_FUNC BufferedFile *tcc_open(TCCState *s1, const char *filename)
 619 {
 620     int fd;
 621     BufferedFile *bf;
 622
 623     if (strcmp(filename, "-") == 0)
 624         fd = 0, filename = "stdin";
 625     else
 626         fd = open(filename, O_RDONLY | O_BINARY);
 627     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 628         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 629                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 630     if (fd < 0)
 631         return NULL;
 632     bf = tcc_malloc(sizeof(BufferedFile));
 633     bf->fd = fd;
 634     bf->buf_ptr = bf->buffer;
 635     bf->buf_end = bf->buffer;
 636     bf->buffer[0] = CH_EOB; /* put eob symbol */
 637     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 638 #ifdef _WIN32
 639     normalize_slashes(bf->filename);
 640 #endif
 641     bf->line_num = 1;
 642     bf->ifndef_macro = 0;
 643     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 644     //    printf("opening '%s'\n", filename);
 645     return bf;
 646 }
 647
 648 ST_FUNC void tcc_close(BufferedFile *bf)
 649 {
 650     total_lines += bf->line_num;
 651     close(bf->fd);
 652     tcc_free(bf);
 653 }
 654
 655 /* compile the C file opened in 'file'. Return non zero if errors. */
 656 static int tcc_compile(TCCState *s1)
 657 {
 658     Sym *define_start;
 659     char buf[512];
 660     volatile int section_sym;
 661
 662 #ifdef INC_DEBUG
 663     printf("%s: **** new file\n", file->filename);
 664 #endif
 665     preprocess_init(s1);
 666
 667     cur_text_section = NULL;
 668     funcname = "";
 669     anon_sym = SYM_FIRST_ANOM;
 670
 671     /* file info: full path + filename */
 672     section_sym = 0; /* avoid warning */
 673     if (s1->do_debug) {
 674         section_sym = put_elf_sym(symtab_section, 0, 0,
 675                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 676                                   text_section->sh_num, NULL);
 677         getcwd(buf, sizeof(buf));
 678 #ifdef _WIN32
 679         normalize_slashes(buf);
 680 #endif
 681         pstrcat(buf, sizeof(buf), "/");
 682         put_stabs_r(buf, N_SO, 0, 0,
 683                     text_section->data_offset, text_section, section_sym);
 684         put_stabs_r(file->filename, N_SO, 0, 0,
 685                     text_section->data_offset, text_section, section_sym);
 686     }
 687     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 688        symbols can be safely used */
 689     put_elf_sym(symtab_section, 0, 0,
 690                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 691                 SHN_ABS, file->filename);
 692
 693     /* define some often used types */
 694     int_type.t = VT_INT;
 695
 696     char_pointer_type.t = VT_BYTE;
 697     mk_pointer(&char_pointer_type);
 698
 699     func_old_type.t = VT_FUNC;
 700     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 701
 702 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 703     float_type.t = VT_FLOAT;
 704     double_type.t = VT_DOUBLE;
 705
 706     func_float_type.t = VT_FUNC;
 707     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 708     func_double_type.t = VT_FUNC;
 709     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 710 #endif
 711
 712 #if 0
 713     /* define 'void *alloca(unsigned int)' builtin function */
 714     {
 715         Sym *s1;
 716
 717         p = anon_sym++;
 718         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 719         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 720         s1->next = NULL;
 721         sym->next = s1;
 722         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 723     }
 724 #endif
 725
 726     define_start = define_stack;
 727     nocode_wanted = 1;
 728
 729     if (setjmp(s1->error_jmp_buf) == 0) {
 730         s1->nb_errors = 0;
 731         s1->error_set_jmp_enabled = 1;
 732
 733         ch = file->buf_ptr[0];
 734         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 735         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 736         next();
 737         decl(VT_CONST);
 738         if (tok != TOK_EOF)
 739             expect("declaration");
 740
 741         /* end of translation unit info */
 742         if (s1->do_debug) {
 743             put_stabs_r(NULL, N_SO, 0, 0,
 744                         text_section->data_offset, text_section, section_sym);
 745         }
 746     }
 747     s1->error_set_jmp_enabled = 0;
 748
 749     /* reset define stack, but leave -Dsymbols (may be incorrect if
 750        they are undefined) */
 751     free_defines(define_start);
 752
 753     gen_inline_functions();
 754
 755     sym_pop(&global_stack, NULL);
 756     sym_pop(&local_stack, NULL);
 757
 758     return s1->nb_errors != 0 ? -1 : 0;
 759 }
 760
 761 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 762 {
 763     BufferedFile bf1, *bf = &bf1;
 764     int ret, len;
 765     char *buf;
 766
 767     /* init file structure */
 768     bf->fd = -1;
 769     /* XXX: avoid copying */
 770     len = strlen(str);
 771     buf = tcc_malloc(len + 1);
 772     if (!buf)
 773         return -1;
 774     memcpy(buf, str, len);
 775     buf[len] = CH_EOB;
 776     bf->buf_ptr = buf;
 777     bf->buf_end = buf + len;
 778     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
 779     bf->line_num = 1;
 780     file = bf;
 781     ret = tcc_compile(s);
 782     file = NULL;
 783     tcc_free(buf);
 784
 785     /* currently, no need to close */
 786     return ret;
 787 }
 788
 789 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 790 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 791 {
 792     BufferedFile bf1, *bf = &bf1;
 793
 794     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
 795     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
 796     /* default value */
 797     if (!value)
 798         value = "1";
 799     pstrcat(bf->buffer, IO_BUF_SIZE, value);
 800
 801     /* init file structure */
 802     bf->fd = -1;
 803     bf->buf_ptr = bf->buffer;
 804     bf->buf_end = bf->buffer + strlen(bf->buffer);
 805     *bf->buf_end = CH_EOB;
 806     bf->filename[0] = '\0';
 807     bf->line_num = 1;
 808     file = bf;
 809
 810     s1->include_stack_ptr = s1->include_stack;
 811
 812     /* parse with define parser */
 813     ch = file->buf_ptr[0];
 814     next_nomacro();
 815     parse_define();
 816     file = NULL;
 817 }
 818
 819 /* undefine a preprocessor symbol */
 820 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 821 {
 822     TokenSym *ts;
 823     Sym *s;
 824     ts = tok_alloc(sym, strlen(sym));
 825     s = define_find(ts->tok);
 826     /* undefine symbol by putting an invalid name */
 827     if (s)
 828         define_undef(s);
 829 }
 830
 831 static void tcc_cleanup(void)
 832 {
 833     int i, n;
 834
 835     if (NULL == tcc_state)
 836         return;
 837     tcc_state = NULL;
 838
 839     /* free -D defines */
 840     free_defines(NULL);
 841
 842     /* free tokens */
 843     n = tok_ident - TOK_IDENT;
 844     for(i = 0; i < n; i++)
 845         tcc_free(table_ident[i]);
 846     tcc_free(table_ident);
 847
 848     /* free sym_pools */
 849     dynarray_reset(&sym_pools, &nb_sym_pools);
 850     /* string buffer */
 851     cstr_free(&tokcstr);
 852     /* reset symbol stack */
 853     sym_free_first = NULL;
 854     /* cleanup from error/setjmp */
 855     macro_ptr = NULL;
 856 }
 857
 858 LIBTCCAPI TCCState *tcc_new(void)
 859 {
 860     TCCState *s;
 861     char buffer[100];
 862     int a,b,c;
 863
 864     tcc_cleanup();
 865
 866     s = tcc_mallocz(sizeof(TCCState));
 867     if (!s)
 868         return NULL;
 869     tcc_state = s;
 870 #ifdef _WIN32
 871     tcc_set_lib_path_w32(s);
 872 #else
 873     tcc_set_lib_path(s, CONFIG_TCCDIR);
 874 #endif
 875     s->output_type = TCC_OUTPUT_MEMORY;
 876     preprocess_new();
 877
 878     /* we add dummy defines for some special macros to speed up tests
 879        and to have working defined() */
 880     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 881     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 882     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 883     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 884
 885     /* standard defines */
 886     tcc_define_symbol(s, "__STDC__", NULL);
 887     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 888 #if defined(TCC_TARGET_I386)
 889     tcc_define_symbol(s, "__i386__", "1");
 890     tcc_define_symbol(s, "__i386", "1");
 891     tcc_define_symbol(s, "i386", "1");
 892 #endif
 893 #if defined(TCC_TARGET_X86_64)
 894     tcc_define_symbol(s, "__x86_64__", NULL);
 895 #endif
 896 #if defined(TCC_TARGET_ARM)
 897     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 898     tcc_define_symbol(s, "__arm_elf__", NULL);
 899     tcc_define_symbol(s, "__arm_elf", NULL);
 900     tcc_define_symbol(s, "arm_elf", NULL);
 901     tcc_define_symbol(s, "__arm__", NULL);
 902     tcc_define_symbol(s, "__arm", NULL);
 903     tcc_define_symbol(s, "arm", NULL);
 904     tcc_define_symbol(s, "__APCS_32__", NULL);
 905 #endif
 906 #ifdef TCC_TARGET_PE
 907     tcc_define_symbol(s, "_WIN32", NULL);
 908 #ifdef TCC_TARGET_X86_64
 909     tcc_define_symbol(s, "_WIN64", NULL);
 910 #endif
 911 #else
 912     tcc_define_symbol(s, "__unix__", "1");
 913     tcc_define_symbol(s, "__unix", "1");
 914     tcc_define_symbol(s, "unix", "1");
 915 #if defined(__FreeBSD__)
 916 #define str(s) #s
 917     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 918     tcc_define_symbol(s, "__INTEL_COMPILER", "1");
 919 #undef str
 920 #endif
 921 #if defined(__linux)
 922     tcc_define_symbol(s, "__linux__", NULL);
 923     tcc_define_symbol(s, "__linux", NULL);
 924 #endif
 925 #endif
 926     /* tiny C specific defines */
 927     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 928     sprintf(buffer, "%d", a*10000 + b*100 + c);
 929     tcc_define_symbol(s, "__TINYC__", buffer);
 930
 931     /* tiny C & gcc defines */
 932     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 933     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 934 #ifdef TCC_TARGET_PE
 935     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 936 #else
 937     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 938 #endif
 939
 940 #ifndef TCC_TARGET_PE
 941     /* default library paths */
 942     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
 943     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
 944     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
 945 #endif
 946
 947     /* no section zero */
 948     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 949
 950     /* create standard sections */
 951     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
 952     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
 953     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
 954
 955     /* symbols are always generated for linking stage */
 956     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
 957                                 ".strtab",
 958                                 ".hashtab", SHF_PRIVATE);
 959     strtab_section = symtab_section->link;
 960
 961     /* private symbol table for dynamic symbols */
 962     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
 963                                       ".dynstrtab",
 964                                       ".dynhashtab", SHF_PRIVATE);
 965     s->alacarte_link = 1;
 966     s->nocommon = 1;
 967
 968 #ifdef CHAR_IS_UNSIGNED
 969     s->char_is_unsigned = 1;
 970 #endif
 971 #if defined(TCC_TARGET_PE) && 0
 972     /* XXX: currently the PE linker is not ready to support that */
 973     s->leading_underscore = 1;
 974 #endif
 975     if (s->section_align == 0)
 976         s->section_align = ELF_PAGE_SIZE;
 977 #ifdef TCC_TARGET_I386
 978     s->seg_size = 32;
 979 #endif
 980     return s;
 981 }
 982
 983 LIBTCCAPI void tcc_delete(TCCState *s1)
 984 {
 985     int i;
 986
 987     tcc_cleanup();
 988
 989     /* free all sections */
 990     for(i = 1; i < s1->nb_sections; i++)
 991         free_section(s1->sections[i]);
 992     dynarray_reset(&s1->sections, &s1->nb_sections);
 993
 994     for(i = 0; i < s1->nb_priv_sections; i++)
 995         free_section(s1->priv_sections[i]);
 996     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
 997
 998     /* free any loaded DLLs */
 999     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1000         DLLReference *ref = s1->loaded_dlls[i];
1001         if ( ref->handle )
1002             dlclose(ref->handle);
1003     }
1004
1005     /* free loaded dlls array */
1006     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1007
1008     /* free library paths */
1009     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1010
1011     /* free include paths */
1012     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1013     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1014     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1015
1016     tcc_free(s1->tcc_lib_path);
1017     tcc_free(s1->runtime_mem);
1018     tcc_free(s1);
1019 }
1020
1021 LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
1022 {
1023     char *pathname1;
1024
1025     pathname1 = tcc_strdup(pathname);
1026     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1027     return 0;
1028 }
1029
1030 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1031 {
1032     char *pathname1;
1033
1034     pathname1 = tcc_strdup(pathname);
1035     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1036     return 0;
1037 }
1038
1039 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1040 {
1041     const char *ext;
1042     ElfW(Ehdr) ehdr;
1043     int fd, ret, size;
1044     BufferedFile *saved_file;
1045
1046     ret = -1;
1047
1048     /* find source file type with extension */
1049     ext = tcc_fileextension(filename);
1050     if (ext[0])
1051         ext++;
1052
1053     /* open the file */
1054     saved_file = file;
1055     file = tcc_open(s1, filename);
1056     if (!file) {
1057         if (flags & AFF_PRINT_ERROR)
1058             error_noabort("file '%s' not found", filename);
1059         goto the_end;
1060     }
1061
1062     if (flags & AFF_PREPROCESS) {
1063         ret = tcc_preprocess(s1);
1064         goto the_end;
1065     }
1066
1067     if (!ext[0] || !PATHCMP(ext, "c")) {
1068         /* C file assumed */
1069         ret = tcc_compile(s1);
1070         goto the_end;
1071     }
1072
1073 #ifdef CONFIG_TCC_ASM
1074     if (!strcmp(ext, "S")) {
1075         /* preprocessed assembler */
1076         ret = tcc_assemble(s1, 1);
1077         goto the_end;
1078     }
1079
1080     if (!strcmp(ext, "s")) {
1081         /* non preprocessed assembler */
1082         ret = tcc_assemble(s1, 0);
1083         goto the_end;
1084     }
1085 #endif
1086
1087     fd = file->fd;
1088     /* assume executable format: auto guess file type */
1089     size = read(fd, &ehdr, sizeof(ehdr));
1090     lseek(fd, 0, SEEK_SET);
1091     if (size <= 0) {
1092         error_noabort("could not read header");
1093         goto the_end;
1094     }
1095
1096     if (size == sizeof(ehdr) &&
1097         ehdr.e_ident[0] == ELFMAG0 &&
1098         ehdr.e_ident[1] == ELFMAG1 &&
1099         ehdr.e_ident[2] == ELFMAG2 &&
1100         ehdr.e_ident[3] == ELFMAG3) {
1101
1102         /* do not display line number if error */
1103         file->line_num = 0;
1104         if (ehdr.e_type == ET_REL) {
1105             ret = tcc_load_object_file(s1, fd, 0);
1106             goto the_end;
1107
1108         }
1109 #ifndef TCC_TARGET_PE
1110         if (ehdr.e_type == ET_DYN) {
1111             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1112                 void *h;
1113                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1114                 if (h)
1115                     ret = 0;
1116             } else {
1117                 ret = tcc_load_dll(s1, fd, filename,
1118                                    (flags & AFF_REFERENCED_DLL) != 0);
1119             }
1120             goto the_end;
1121         }
1122 #endif
1123         error_noabort("unrecognized ELF file");
1124         goto the_end;
1125     }
1126
1127     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1128         file->line_num = 0; /* do not display line number if error */
1129         ret = tcc_load_archive(s1, fd);
1130         goto the_end;
1131     }
1132
1133 #ifdef TCC_TARGET_COFF
1134     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1135         ret = tcc_load_coff(s1, fd);
1136         goto the_end;
1137     }
1138 #endif
1139
1140 #ifdef TCC_TARGET_PE
1141     ret = pe_load_file(s1, filename, fd);
1142 #else
1143     /* as GNU ld, consider it is an ld script if not recognized */
1144     ret = tcc_load_ldscript(s1);
1145 #endif
1146     if (ret < 0)
1147         error_noabort("unrecognized file type");
1148
1149 the_end:
1150     if (file)
1151         tcc_close(file);
1152     file = saved_file;
1153     return ret;
1154 }
1155
1156 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1157 {
1158     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1159         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1160     else
1161         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1162 }
1163
1164 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1165 {
1166     char *pathname1;
1167
1168     pathname1 = tcc_strdup(pathname);
1169     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1170     return 0;
1171 }
1172
1173 /* find and load a dll. Return non zero if not found */
1174 /* XXX: add '-rpath' option support ? */
1175 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1176 {
1177     char buf[1024];
1178     int i;
1179
1180     for(i = 0; i < s->nb_library_paths; i++) {
1181         snprintf(buf, sizeof(buf), "%s/%s",
1182                  s->library_paths[i], filename);
1183         if (tcc_add_file_internal(s, buf, flags) == 0)
1184             return 0;
1185     }
1186     return -1;
1187 }
1188
1189 /* the library name is the same as the argument of the '-l' option */
1190 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1191 {
1192     char buf[1024];
1193     int i;
1194
1195     /* first we look for the dynamic library if not static linking */
1196     if (!s->static_link) {
1197 #ifdef TCC_TARGET_PE
1198         if (pe_add_dll(s, libraryname) == 0)
1199             return 0;
1200 #else
1201         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1202         if (tcc_add_dll(s, buf, 0) == 0)
1203             return 0;
1204 #endif
1205     }
1206     /* then we look for the static library */
1207     for(i = 0; i < s->nb_library_paths; i++) {
1208         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1209                  s->library_paths[i], libraryname);
1210         if (tcc_add_file_internal(s, buf, 0) == 0)
1211             return 0;
1212     }
1213     return -1;
1214 }
1215
1216 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, void *val)
1217 {
1218 #ifdef TCC_TARGET_PE
1219     pe_putimport(s, 0, name, val);
1220 #else
1221     add_elf_sym(symtab_section, (uplong)val, 0,
1222                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1223                 SHN_ABS, name);
1224 #endif
1225     return 0;
1226 }
1227
1228 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1229 {
1230     char buf[1024];
1231
1232     s->output_type = output_type;
1233
1234     if (!s->nostdinc) {
1235         /* default include paths */
1236         /* XXX: reverse order needed if -isystem support */
1237 #ifndef TCC_TARGET_PE
1238         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
1239         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
1240 #endif
1241         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1242         tcc_add_sysinclude_path(s, buf);
1243 #ifdef TCC_TARGET_PE
1244         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1245         tcc_add_sysinclude_path(s, buf);
1246 #endif
1247     }
1248
1249     /* if bound checking, then add corresponding sections */
1250 #ifdef CONFIG_TCC_BCHECK
1251     if (s->do_bounds_check) {
1252         /* define symbol */
1253         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1254         /* create bounds sections */
1255         bounds_section = new_section(s, ".bounds",
1256                                      SHT_PROGBITS, SHF_ALLOC);
1257         lbounds_section = new_section(s, ".lbounds",
1258                                       SHT_PROGBITS, SHF_ALLOC);
1259     }
1260 #endif
1261
1262     if (s->char_is_unsigned) {
1263         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1264     }
1265
1266     /* add debug sections */
1267     if (s->do_debug) {
1268         /* stab symbols */
1269         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1270         stab_section->sh_entsize = sizeof(Stab_Sym);
1271         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1272         put_elf_str(stabstr_section, "");
1273         stab_section->link = stabstr_section;
1274         /* put first entry */
1275         put_stabs("", 0, 0, 0, 0);
1276     }
1277
1278     /* add libc crt1/crti objects */
1279 #ifndef TCC_TARGET_PE
1280     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1281         !s->nostdlib) {
1282         if (output_type != TCC_OUTPUT_DLL)
1283             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1284         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1285     }
1286 #endif
1287
1288 #ifdef TCC_TARGET_PE
1289     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1290     tcc_add_library_path(s, buf);
1291 #ifdef _WIN32
1292     if (GetSystemDirectory(buf, sizeof buf))
1293         tcc_add_library_path(s, buf);
1294 #endif
1295 #endif
1296
1297     return 0;
1298 }
1299
1300 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1301 #define FD_INVERT 0x0002 /* invert value before storing */
1302
1303 typedef struct FlagDef {
1304     uint16_t offset;
1305     uint16_t flags;
1306     const char *name;
1307 } FlagDef;
1308
1309 static const FlagDef warning_defs[] = {
1310     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1311     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1312     { offsetof(TCCState, warn_error), 0, "error" },
1313     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1314       "implicit-function-declaration" },
1315 };
1316
1317 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1318                     const char *name, int value)
1319 {
1320     int i;
1321     const FlagDef *p;
1322     const char *r;
1323
1324     r = name;
1325     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1326         r += 3;
1327         value = !value;
1328     }
1329     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1330         if (!strcmp(r, p->name))
1331             goto found;
1332     }
1333     return -1;
1334  found:
1335     if (p->flags & FD_INVERT)
1336         value = !value;
1337     *(int *)((uint8_t *)s + p->offset) = value;
1338     return 0;
1339 }
1340
1341 /* set/reset a warning */
1342 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1343 {
1344     int i;
1345     const FlagDef *p;
1346
1347     if (!strcmp(warning_name, "all")) {
1348         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1349             if (p->flags & WD_ALL)
1350                 *(int *)((uint8_t *)s + p->offset) = 1;
1351         }
1352         return 0;
1353     } else {
1354         return set_flag(s, warning_defs, countof(warning_defs),
1355                         warning_name, value);
1356     }
1357 }
1358
1359 static const FlagDef flag_defs[] = {
1360     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1361     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1362     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1363     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1364 };
1365
1366 /* set/reset a flag */
1367 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1368 {
1369     return set_flag(s, flag_defs, countof(flag_defs),
1370                     flag_name, value);
1371 }
1372
1373 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1374 {
1375     double tt;
1376     tt = (double)total_time / 1000000.0;
1377     if (tt < 0.001)
1378         tt = 0.001;
1379     if (total_bytes < 1)
1380         total_bytes = 1;
1381     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1382            tok_ident - TOK_IDENT, total_lines, total_bytes,
1383            tt, (int)(total_lines / tt),
1384            total_bytes / tt / 1000000.0);
1385 }
1386
1387 /* set CONFIG_TCCDIR at runtime */
1388 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1389 {
1390     tcc_free(s->tcc_lib_path);
1391     s->tcc_lib_path = tcc_strdup(path);
1392 }
1393
1394 PUB_FUNC void set_num_callers(int n)
1395 {
1396 #ifdef CONFIG_TCC_BACKTRACE
1397     num_callers = n;
1398 #endif
1399 }