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