smatch_flow.c

   1 /*
   2  * Copyright (C) 2006,2008 Dan Carpenter.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #define _GNU_SOURCE 1
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include "token.h"
  22 #include "scope.h"
  23 #include "smatch.h"
  24 #include "smatch_expression_stacks.h"
  25 #include "smatch_extra.h"
  26 #include "smatch_slist.h"
  27
  28 int __in_fake_assign;
  29 int final_pass;
  30 int __inline_call;
  31 struct expression  *__inline_fn;
  32
  33 static int __smatch_lineno = 0;
  34
  35 static char *base_file;
  36 static const char *filename;
  37 static char *pathname;
  38 static char *full_filename;
  39 static char *cur_func;
  40 static unsigned int loop_count;
  41 static int last_goto_statement_handled;
  42 int __expr_stmt_count;
  43 int __in_function_def;
  44 static struct expression_list *switch_expr_stack = NULL;
  45 static struct expression_list *post_op_stack = NULL;
  46
  47 struct expression_list *big_expression_stack;
  48 struct statement_list *big_statement_stack;
  49 int __in_pre_condition = 0;
  50 int __bail_on_rest_of_function = 0;
  51 static struct timeval fn_start_time;
  52 char *get_function(void) { return cur_func; }
  53 int get_lineno(void) { return __smatch_lineno; }
  54 int inside_loop(void) { return !!loop_count; }
  55 int definitely_inside_loop(void) { return !!(loop_count & ~0x80000000); }
  56 struct expression *get_switch_expr(void) { return top_expression(switch_expr_stack); }
  57 int in_expression_statement(void) { return !!__expr_stmt_count; }
  58
  59 static void split_symlist(struct symbol_list *sym_list);
  60 static void split_declaration(struct symbol_list *sym_list);
  61 static void split_expr_list(struct expression_list *expr_list);
  62 static void add_inline_function(struct symbol *sym);
  63 static void parse_inline(struct expression *expr);
  64
  65 int option_assume_loops = 0;
  66 int option_known_conditions = 0;
  67 int option_two_passes = 0;
  68 struct symbol *cur_func_sym = NULL;
  69 struct stree *global_states;
  70
  71 long long valid_ptr_min = 4096;
  72 long long valid_ptr_max = 7777777777;
  73 sval_t valid_ptr_min_sval = {
  74         .type = &ptr_ctype,
  75         {.value = 4096},
  76 };
  77 sval_t valid_ptr_max_sval = {
  78         .type = &ptr_ctype,
  79         {.value = LONG_MAX - 100000},
  80 };
  81
  82 static void set_valid_ptr_max(void)
  83 {
  84         if (type_bits(&ptr_ctype) == 32)
  85                 valid_ptr_max = 7777777777;
  86         else if (type_bits(&ptr_ctype) == 64)
  87                 valid_ptr_max = 7777777777777777777LL;
  88
  89         valid_ptr_max_sval.value = valid_ptr_max;
  90 }
  91
  92 int outside_of_function(void)
  93 {
  94         return cur_func_sym == NULL;
  95 }
  96
  97 const char *get_filename(void)
  98 {
  99         if (option_info)
 100                 return base_file;
 101         if (option_full_path)
 102                 return full_filename;
 103         return filename;
 104 }
 105
 106 const char *get_base_file(void)
 107 {
 108         return base_file;
 109 }
 110
 111 static void set_position(struct position pos)
 112 {
 113         int len;
 114         static int prev_stream = -1;
 115
 116         if (pos.stream == 0 && pos.line == 0)
 117                 return;
 118
 119         __smatch_lineno = pos.line;
 120
 121         if (pos.stream == prev_stream)
 122                 return;
 123
 124         filename = stream_name(pos.stream);
 125
 126         free(full_filename);
 127         pathname = getcwd(NULL, 0);
 128         if (pathname) {
 129                 len = strlen(pathname) + 1 + strlen(filename) + 1;
 130                 full_filename = malloc(len);
 131                 snprintf(full_filename, len, "%s/%s", pathname, filename);
 132         } else {
 133                 full_filename = alloc_string(filename);
 134         }
 135         free(pathname);
 136 }
 137
 138 static int is_inline_func(struct expression *expr)
 139 {
 140         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 141                 return 0;
 142         if (expr->symbol->ctype.modifiers & MOD_INLINE)
 143                 return 1;
 144         return 0;
 145 }
 146
 147 static int is_noreturn_func(struct expression *expr)
 148 {
 149         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 150                 return 0;
 151         if (expr->symbol->ctype.modifiers & MOD_NORETURN)
 152                 return 1;
 153         return 0;
 154 }
 155
 156 int inlinable(struct expression *expr)
 157 {
 158         struct symbol *sym;
 159
 160         if (__inline_fn)  /* don't nest */
 161                 return 0;
 162
 163         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 164                 return 0;
 165         if (is_no_inline_function(expr->symbol->ident->name))
 166                 return 0;
 167         sym = get_base_type(expr->symbol);
 168         if (sym->stmt && sym->stmt->type == STMT_COMPOUND) {
 169                 if (ptr_list_size((struct ptr_list *)sym->stmt->stmts) <= 10)
 170                         return 1;
 171                 return 0;
 172         }
 173         if (sym->inline_stmt && sym->inline_stmt->type == STMT_COMPOUND) {
 174                 if (ptr_list_size((struct ptr_list *)sym->inline_stmt->stmts) <= 10)
 175                         return 1;
 176                 return 0;
 177         }
 178         return 0;
 179 }
 180
 181 void __process_post_op_stack(void)
 182 {
 183         struct expression *expr;
 184
 185         FOR_EACH_PTR(post_op_stack, expr) {
 186                 __pass_to_client(expr, OP_HOOK);
 187         } END_FOR_EACH_PTR(expr);
 188
 189         __free_ptr_list((struct ptr_list **)&post_op_stack);
 190 }
 191
 192 void __split_expr(struct expression *expr)
 193 {
 194         if (!expr)
 195                 return;
 196
 197         // sm_msg(" Debug expr_type %d %s", expr->type, show_special(expr->op));
 198
 199         if (__in_fake_assign && expr->type != EXPR_ASSIGNMENT)
 200                 return;
 201         if (__in_fake_assign >= 4)  /* don't allow too much nesting */
 202                 return;
 203
 204         push_expression(&big_expression_stack, expr);
 205         set_position(expr->pos);
 206         __pass_to_client(expr, EXPR_HOOK);
 207
 208         switch (expr->type) {
 209         case EXPR_PREOP:
 210                 if (expr->op == '*')
 211                         __pass_to_client(expr, DEREF_HOOK);
 212                 __split_expr(expr->unop);
 213                 __pass_to_client(expr, OP_HOOK);
 214                 break;
 215         case EXPR_POSTOP:
 216                 __split_expr(expr->unop);
 217                 push_expression(&post_op_stack, expr);
 218                 break;
 219         case EXPR_STATEMENT:
 220                 __expr_stmt_count++;
 221                 __split_stmt(expr->statement);
 222                 __expr_stmt_count--;
 223                 break;
 224         case EXPR_LOGICAL:
 225         case EXPR_COMPARE:
 226                 __pass_to_client(expr, LOGIC_HOOK);
 227                 __handle_logic(expr);
 228                 break;
 229         case EXPR_BINOP:
 230                 __pass_to_client(expr, BINOP_HOOK);
 231         case EXPR_COMMA:
 232                 __split_expr(expr->left);
 233                 __process_post_op_stack();
 234                 __split_expr(expr->right);
 235                 break;
 236         case EXPR_ASSIGNMENT: {
 237                 struct expression *tmp;
 238
 239                 if (!expr->right)
 240                         break;
 241
 242                 __pass_to_client(expr, RAW_ASSIGNMENT_HOOK);
 243
 244                 /* foo = !bar() */
 245                 if (__handle_condition_assigns(expr))
 246                         break;
 247                 /* foo = (x < 5 ? foo : 5); */
 248                 if (__handle_select_assigns(expr))
 249                         break;
 250                 /* foo = ({frob(); frob(); frob(); 1;}) */
 251                 if (__handle_expr_statement_assigns(expr))
 252                         break;
 253
 254                 __split_expr(expr->right);
 255                 if (outside_of_function())
 256                         __pass_to_client(expr, GLOBAL_ASSIGNMENT_HOOK);
 257                 else
 258                         __pass_to_client(expr, ASSIGNMENT_HOOK);
 259
 260                 __fake_struct_member_assignments(expr);
 261
 262                 tmp = strip_expr(expr->right);
 263                 if (tmp->type == EXPR_CALL)
 264                         __pass_to_client(expr, CALL_ASSIGNMENT_HOOK);
 265                 if (get_macro_name(tmp->pos) &&
 266                     get_macro_name(expr->pos) != get_macro_name(tmp->pos))
 267                         __pass_to_client(expr, MACRO_ASSIGNMENT_HOOK);
 268                 __split_expr(expr->left);
 269                 break;
 270         }
 271         case EXPR_DEREF:
 272                 __pass_to_client(expr, DEREF_HOOK);
 273                 __split_expr(expr->deref);
 274                 break;
 275         case EXPR_SLICE:
 276                 __split_expr(expr->base);
 277                 break;
 278         case EXPR_CAST:
 279         case EXPR_FORCE_CAST:
 280                 __pass_to_client(expr, CAST_HOOK);
 281                 __split_expr(expr->cast_expression);
 282                 break;
 283         case EXPR_SIZEOF:
 284                 if (expr->cast_expression)
 285                         __pass_to_client(strip_parens(expr->cast_expression),
 286                                          SIZEOF_HOOK);
 287                 break;
 288         case EXPR_OFFSETOF:
 289         case EXPR_ALIGNOF:
 290                 evaluate_expression(expr);
 291                 break;
 292         case EXPR_CONDITIONAL:
 293         case EXPR_SELECT:
 294                 if (known_condition_true(expr->conditional)) {
 295                         __split_expr(expr->cond_true);
 296                         break;
 297                 }
 298                 if (known_condition_false(expr->conditional)) {
 299                         __split_expr(expr->cond_false);
 300                         break;
 301                 }
 302                 __pass_to_client(expr, SELECT_HOOK);
 303                 __split_whole_condition(expr->conditional);
 304                 __split_expr(expr->cond_true);
 305                 __push_true_states();
 306                 __use_false_states();
 307                 __split_expr(expr->cond_false);
 308                 __merge_true_states();
 309                 break;
 310         case EXPR_CALL:
 311                 if (sym_name_is("__builtin_constant_p", expr->fn))
 312                         break;
 313                 split_expr_list(expr->args);
 314                 __split_expr(expr->fn);
 315                 if (is_inline_func(expr->fn))
 316                         add_inline_function(expr->fn->symbol);
 317                 if (inlinable(expr->fn))
 318                         __inline_call = 1;
 319                 __process_post_op_stack();
 320                 __pass_to_client(expr, FUNCTION_CALL_HOOK);
 321                 __inline_call = 0;
 322                 if (inlinable(expr->fn)) {
 323                         parse_inline(expr);
 324                 }
 325                 __pass_to_client(expr, CALL_HOOK_AFTER_INLINE);
 326                 __pass_to_client(expr, FUNCTION_CALL_HOOK_AFTER);
 327                 if (is_noreturn_func(expr->fn))
 328                         nullify_path();
 329                 break;
 330         case EXPR_INITIALIZER:
 331                 split_expr_list(expr->expr_list);
 332                 break;
 333         case EXPR_IDENTIFIER:
 334                 __split_expr(expr->ident_expression);
 335                 break;
 336         case EXPR_INDEX:
 337                 __split_expr(expr->idx_expression);
 338                 break;
 339         case EXPR_POS:
 340                 __split_expr(expr->init_expr);
 341                 break;
 342         case EXPR_SYMBOL:
 343                 __pass_to_client(expr, SYM_HOOK);
 344                 break;
 345         case EXPR_STRING:
 346                 __pass_to_client(expr, STRING_HOOK);
 347                 break;
 348         default:
 349                 break;
 350         };
 351         pop_expression(&big_expression_stack);
 352 }
 353
 354 static int is_forever_loop(struct statement *stmt)
 355 {
 356         struct expression *expr;
 357
 358         expr = strip_expr(stmt->iterator_pre_condition);
 359         if (!expr)
 360                 expr = stmt->iterator_post_condition;
 361         if (!expr) {
 362                 /* this is a for(;;) loop... */
 363                 return 1;
 364         }
 365
 366         if (expr->type == EXPR_VALUE && expr->value == 1)
 367                 return 1;
 368
 369         return 0;
 370 }
 371
 372 static int loop_num;
 373 static char *get_loop_name(int num)
 374 {
 375         char buf[256];
 376
 377         snprintf(buf, 255, "-loop%d", num);
 378         buf[255] = '\0';
 379         return alloc_sname(buf);
 380 }
 381
 382 /*
 383  * Pre Loops are while and for loops.
 384  */
 385 static void handle_pre_loop(struct statement *stmt)
 386 {
 387         int once_through; /* we go through the loop at least once */
 388         struct sm_state *extra_sm = NULL;
 389         int unchanged = 0;
 390         char *loop_name;
 391         struct stree *stree = NULL;
 392         struct sm_state *sm = NULL;
 393
 394         loop_name = get_loop_name(loop_num);
 395         loop_num++;
 396
 397         __split_stmt(stmt->iterator_pre_statement);
 398
 399         once_through = implied_condition_true(stmt->iterator_pre_condition);
 400
 401         loop_count++;
 402         __push_continues();
 403         __push_breaks();
 404
 405         __merge_gotos(loop_name);
 406
 407         extra_sm = __extra_handle_canonical_loops(stmt, &stree);
 408         __in_pre_condition++;
 409         __pass_to_client(stmt, PRELOOP_HOOK);
 410         __split_whole_condition(stmt->iterator_pre_condition);
 411         __in_pre_condition--;
 412         FOR_EACH_SM(stree, sm) {
 413                 set_state(sm->owner, sm->name, sm->sym, sm->state);
 414         } END_FOR_EACH_SM(sm);
 415         free_stree(&stree);
 416         if (extra_sm)
 417                 extra_sm = get_sm_state(extra_sm->owner, extra_sm->name, extra_sm->sym);
 418
 419         if (option_assume_loops)
 420                 once_through = 1;
 421
 422         __split_stmt(stmt->iterator_statement);
 423         __warn_on_silly_pre_loops();
 424         if (is_forever_loop(stmt)) {
 425                 __merge_continues();
 426                 __save_gotos(loop_name);
 427
 428                 __push_fake_cur_stree();
 429                 __split_stmt(stmt->iterator_post_statement);
 430                 stree = __pop_fake_cur_stree();
 431
 432                 __discard_false_states();
 433                 __use_breaks();
 434
 435                 if (!__path_is_null())
 436                         __merge_stree_into_cur(stree);
 437                 free_stree(&stree);
 438         } else {
 439                 __merge_continues();
 440                 unchanged = __iterator_unchanged(extra_sm);
 441                 __split_stmt(stmt->iterator_post_statement);
 442                 __save_gotos(loop_name);
 443                 __in_pre_condition++;
 444                 __split_whole_condition(stmt->iterator_pre_condition);
 445                 __in_pre_condition--;
 446                 nullify_path();
 447                 __merge_false_states();
 448                 if (once_through)
 449                         __discard_false_states();
 450                 else
 451                         __merge_false_states();
 452
 453                 if (extra_sm && unchanged)
 454                         __extra_pre_loop_hook_after(extra_sm,
 455                                                 stmt->iterator_post_statement,
 456                                                 stmt->iterator_pre_condition);
 457                 __merge_breaks();
 458         }
 459         loop_count--;
 460 }
 461
 462 /*
 463  * Post loops are do {} while();
 464  */
 465 static void handle_post_loop(struct statement *stmt)
 466 {
 467         char *loop_name;
 468
 469         loop_name = get_loop_name(loop_num);
 470         loop_num++;
 471         loop_count++;
 472
 473         __push_continues();
 474         __push_breaks();
 475         __merge_gotos(loop_name);
 476         __split_stmt(stmt->iterator_statement);
 477         __merge_continues();
 478         if (!is_zero(stmt->iterator_post_condition))
 479                 __save_gotos(loop_name);
 480
 481         if (is_forever_loop(stmt)) {
 482                 __use_breaks();
 483         } else {
 484                 __split_whole_condition(stmt->iterator_post_condition);
 485                 __use_false_states();
 486                 __merge_breaks();
 487         }
 488         loop_count--;
 489 }
 490
 491 static int empty_statement(struct statement *stmt)
 492 {
 493         if (!stmt)
 494                 return 0;
 495         if (stmt->type == STMT_EXPRESSION && !stmt->expression)
 496                 return 1;
 497         return 0;
 498 }
 499
 500 static int last_stmt_on_same_line(void)
 501 {
 502         struct statement *stmt;
 503         int i = 0;
 504
 505         FOR_EACH_PTR_REVERSE(big_statement_stack, stmt) {
 506                 if (!i++)
 507                         continue;
 508                 if  (stmt->pos.line == get_lineno())
 509                         return 1;
 510                 return 0;
 511         } END_FOR_EACH_PTR_REVERSE(stmt);
 512         return 0;
 513 }
 514
 515 static void split_asm_constraints(struct expression_list *expr_list)
 516 {
 517         struct expression *expr;
 518         int state = 0;
 519
 520         FOR_EACH_PTR(expr_list, expr) {
 521                 switch (state) {
 522                 case 0: /* identifier */
 523                 case 1: /* constraint */
 524                         state++;
 525                         continue;
 526                 case 2: /* expression */
 527                         state = 0;
 528                         __split_expr(expr);
 529                         continue;
 530                 }
 531         } END_FOR_EACH_PTR(expr);
 532 }
 533
 534 static int is_case_val(struct statement *stmt, sval_t sval)
 535 {
 536         sval_t case_sval;
 537
 538         if (stmt->type != STMT_CASE)
 539                 return 0;
 540         if (!stmt->case_expression) {
 541                 __set_default();
 542                 return 1;
 543         }
 544         if (!get_value(stmt->case_expression, &case_sval))
 545                 return 0;
 546         if (case_sval.value == sval.value)
 547                 return 1;
 548         return 0;
 549 }
 550
 551 static void split_known_switch(struct statement *stmt, sval_t sval)
 552 {
 553         struct statement *tmp;
 554
 555         __split_expr(stmt->switch_expression);
 556
 557         push_expression(&switch_expr_stack, stmt->switch_expression);
 558         __save_switch_states(top_expression(switch_expr_stack));
 559         nullify_path();
 560         __push_default();
 561         __push_breaks();
 562
 563         stmt = stmt->switch_statement;
 564
 565         __push_scope_hooks();
 566         FOR_EACH_PTR(stmt->stmts, tmp) {
 567                 __smatch_lineno = tmp->pos.line;
 568                 if (is_case_val(tmp, sval)) {
 569                         __merge_switches(top_expression(switch_expr_stack),
 570                                          stmt->case_expression);
 571                         __pass_case_to_client(top_expression(switch_expr_stack),
 572                                               stmt->case_expression);
 573                 }
 574                 if (__path_is_null())
 575                         continue;
 576                 __split_stmt(tmp);
 577                 if (__path_is_null()) {
 578                         __set_default();
 579                         goto out;
 580                 }
 581         } END_FOR_EACH_PTR(tmp);
 582 out:
 583         __call_scope_hooks();
 584         if (!__pop_default())
 585                 __merge_switches(top_expression(switch_expr_stack),
 586                                  NULL);
 587         __discard_switches();
 588         __merge_breaks();
 589         pop_expression(&switch_expr_stack);
 590 }
 591
 592 static int taking_too_long(void)
 593 {
 594         int ms;
 595
 596         ms = ms_since(&fn_start_time);
 597         if (ms > 1000 * 60 * 5)  /* five minutes */
 598                 return 1;
 599         return 0;
 600 }
 601
 602 static int is_last_stmt(struct statement *cur_stmt)
 603 {
 604         struct symbol *fn = get_base_type(cur_func_sym);
 605         struct statement *stmt;
 606
 607         if (!fn)
 608                 return 0;
 609         stmt = fn->stmt;
 610         if (!stmt)
 611                 stmt = fn->inline_stmt;
 612         if (!stmt || stmt->type != STMT_COMPOUND)
 613                 return 0;
 614         stmt = last_ptr_list((struct ptr_list *)stmt->stmts);
 615         if (stmt && stmt->type == STMT_LABEL)
 616                 stmt = stmt->label_statement;
 617         if (stmt == cur_stmt)
 618                 return 1;
 619         return 0;
 620 }
 621
 622 static void handle_backward_goto(struct statement *goto_stmt)
 623 {
 624         const char *goto_name, *label_name;
 625         struct statement *func_stmt;
 626         struct symbol *base_type = get_base_type(cur_func_sym);
 627         struct statement *tmp;
 628         int found = 0;
 629
 630         if (!option_info)
 631                 return;
 632         if (last_goto_statement_handled)
 633                 return;
 634         last_goto_statement_handled = 1;
 635
 636         if (!goto_stmt->goto_label ||
 637             goto_stmt->goto_label->type != SYM_LABEL ||
 638             !goto_stmt->goto_label->ident)
 639                 return;
 640         goto_name = goto_stmt->goto_label->ident->name;
 641
 642         func_stmt = base_type->stmt;
 643         if (!func_stmt)
 644                 func_stmt = base_type->inline_stmt;
 645         if (!func_stmt)
 646                 return;
 647         if (func_stmt->type != STMT_COMPOUND)
 648                 return;
 649
 650         FOR_EACH_PTR(func_stmt->stmts, tmp) {
 651                 if (!found) {
 652                         if (tmp->type != STMT_LABEL)
 653                                 continue;
 654                         if (!tmp->label_identifier ||
 655                             tmp->label_identifier->type != SYM_LABEL ||
 656                             !tmp->label_identifier->ident)
 657                                 continue;
 658                         label_name = tmp->label_identifier->ident->name;
 659                         if (strcmp(goto_name, label_name) != 0)
 660                                 continue;
 661                         found = 1;
 662                 }
 663                 __split_stmt(tmp);
 664         } END_FOR_EACH_PTR(tmp);
 665 }
 666
 667 static void fake_a_return(void)
 668 {
 669         struct symbol *return_type;
 670
 671         nullify_path();
 672         __unnullify_path();
 673
 674         return_type = get_real_base_type(cur_func_sym);
 675         return_type = get_real_base_type(return_type);
 676         if (return_type != &void_ctype) {
 677                 __pass_to_client(unknown_value_expression(NULL), RETURN_HOOK);
 678                 nullify_path();
 679         }
 680
 681         __pass_to_client(cur_func_sym, END_FUNC_HOOK);
 682         __pass_to_client(cur_func_sym, AFTER_FUNC_HOOK);
 683 }
 684
 685 void __split_stmt(struct statement *stmt)
 686 {
 687         sval_t sval;
 688
 689         if (!stmt)
 690                 goto out;
 691
 692         if (__bail_on_rest_of_function || out_of_memory() || taking_too_long()) {
 693                 static char *printed = NULL;
 694
 695                 __bail_on_rest_of_function = 1;
 696                 if (printed != cur_func)
 697                         sm_msg("Function too hairy.  Giving up.");
 698                 fake_a_return();
 699                 final_pass = 0;  /* turn off sm_msg() from here */
 700                 printed = cur_func;
 701                 return;
 702         }
 703
 704         add_ptr_list(&big_statement_stack, stmt);
 705         free_expression_stack(&big_expression_stack);
 706         set_position(stmt->pos);
 707         __pass_to_client(stmt, STMT_HOOK);
 708
 709         switch (stmt->type) {
 710         case STMT_DECLARATION:
 711                 split_declaration(stmt->declaration);
 712                 break;
 713         case STMT_RETURN:
 714                 __split_expr(stmt->ret_value);
 715                 __pass_to_client(stmt->ret_value, RETURN_HOOK);
 716                 __process_post_op_stack();
 717                 nullify_path();
 718                 break;
 719         case STMT_EXPRESSION:
 720                 __split_expr(stmt->expression);
 721                 break;
 722         case STMT_COMPOUND: {
 723                 struct statement *tmp;
 724
 725                 __push_scope_hooks();
 726                 FOR_EACH_PTR(stmt->stmts, tmp) {
 727                         __split_stmt(tmp);
 728                 } END_FOR_EACH_PTR(tmp);
 729                 __call_scope_hooks();
 730                 break;
 731         }
 732         case STMT_IF:
 733                 if (known_condition_true(stmt->if_conditional)) {
 734                         __split_stmt(stmt->if_true);
 735                         break;
 736                 }
 737                 if (known_condition_false(stmt->if_conditional)) {
 738                         __split_stmt(stmt->if_false);
 739                         break;
 740                 }
 741                 if (option_known_conditions &&
 742                     implied_condition_true(stmt->if_conditional)) {
 743                         sm_info("this condition is true.");
 744                         __split_stmt(stmt->if_true);
 745                         break;
 746                 }
 747                 if (option_known_conditions &&
 748                     implied_condition_false(stmt->if_conditional)) {
 749                         sm_info("this condition is false.");
 750                         __split_stmt(stmt->if_false);
 751                         break;
 752                 }
 753                 __split_whole_condition(stmt->if_conditional);
 754                 __split_stmt(stmt->if_true);
 755                 if (empty_statement(stmt->if_true) &&
 756                         last_stmt_on_same_line() &&
 757                         !get_macro_name(stmt->if_true->pos))
 758                         sm_msg("warn: if();");
 759                 __push_true_states();
 760                 __use_false_states();
 761                 __split_stmt(stmt->if_false);
 762                 __merge_true_states();
 763                 break;
 764         case STMT_ITERATOR:
 765                 if (stmt->iterator_pre_condition)
 766                         handle_pre_loop(stmt);
 767                 else if (stmt->iterator_post_condition)
 768                         handle_post_loop(stmt);
 769                 else {
 770                         // these are for(;;) type loops.
 771                         handle_pre_loop(stmt);
 772                 }
 773                 break;
 774         case STMT_SWITCH:
 775                 if (get_value(stmt->switch_expression, &sval)) {
 776                         split_known_switch(stmt, sval);
 777                         break;
 778                 }
 779                 __split_expr(stmt->switch_expression);
 780                 push_expression(&switch_expr_stack, stmt->switch_expression);
 781                 __save_switch_states(top_expression(switch_expr_stack));
 782                 nullify_path();
 783                 __push_default();
 784                 __push_breaks();
 785                 __split_stmt(stmt->switch_statement);
 786                 if (!__pop_default())
 787                         __merge_switches(top_expression(switch_expr_stack),
 788                                       NULL);
 789                 __discard_switches();
 790                 __merge_breaks();
 791                 pop_expression(&switch_expr_stack);
 792                 break;
 793         case STMT_CASE:
 794                 __merge_switches(top_expression(switch_expr_stack),
 795                                       stmt->case_expression);
 796                 __pass_case_to_client(top_expression(switch_expr_stack),
 797                                       stmt->case_expression);
 798                 if (!stmt->case_expression)
 799                         __set_default();
 800                 __split_expr(stmt->case_expression);
 801                 __split_expr(stmt->case_to);
 802                 __split_stmt(stmt->case_statement);
 803                 break;
 804         case STMT_LABEL:
 805                 if (stmt->label_identifier &&
 806                     stmt->label_identifier->type == SYM_LABEL &&
 807                     stmt->label_identifier->ident) {
 808                         loop_count |= 0x80000000;
 809                         __merge_gotos(stmt->label_identifier->ident->name);
 810                 }
 811                 __split_stmt(stmt->label_statement);
 812                 break;
 813         case STMT_GOTO:
 814                 __split_expr(stmt->goto_expression);
 815                 if (stmt->goto_label && stmt->goto_label->type == SYM_NODE) {
 816                         if (!strcmp(stmt->goto_label->ident->name, "break")) {
 817                                 __process_breaks();
 818                         } else if (!strcmp(stmt->goto_label->ident->name,
 819                                            "continue")) {
 820                                 __process_continues();
 821                         }
 822                 } else if (stmt->goto_label &&
 823                            stmt->goto_label->type == SYM_LABEL &&
 824                            stmt->goto_label->ident) {
 825                         __save_gotos(stmt->goto_label->ident->name);
 826                 }
 827                 nullify_path();
 828                 if (is_last_stmt(stmt))
 829                         handle_backward_goto(stmt);
 830                 break;
 831         case STMT_NONE:
 832                 break;
 833         case STMT_ASM:
 834                 __pass_to_client(stmt, ASM_HOOK);
 835                 __split_expr(stmt->asm_string);
 836                 split_asm_constraints(stmt->asm_outputs);
 837                 split_asm_constraints(stmt->asm_inputs);
 838                 split_asm_constraints(stmt->asm_clobbers);
 839                 break;
 840         case STMT_CONTEXT:
 841                 break;
 842         case STMT_RANGE:
 843                 __split_expr(stmt->range_expression);
 844                 __split_expr(stmt->range_low);
 845                 __split_expr(stmt->range_high);
 846                 break;
 847         }
 848         __pass_to_client(stmt, STMT_HOOK_AFTER);
 849 out:
 850         __process_post_op_stack();
 851 }
 852
 853 static void split_expr_list(struct expression_list *expr_list)
 854 {
 855         struct expression *expr;
 856
 857         FOR_EACH_PTR(expr_list, expr) {
 858                 __split_expr(expr);
 859                 __process_post_op_stack();
 860         } END_FOR_EACH_PTR(expr);
 861 }
 862
 863 static void split_sym(struct symbol *sym)
 864 {
 865         if (!sym)
 866                 return;
 867         if (!(sym->namespace & NS_SYMBOL))
 868                 return;
 869
 870         __split_stmt(sym->stmt);
 871         __split_expr(sym->array_size);
 872         split_symlist(sym->arguments);
 873         split_symlist(sym->symbol_list);
 874         __split_stmt(sym->inline_stmt);
 875         split_symlist(sym->inline_symbol_list);
 876 }
 877
 878 static void split_symlist(struct symbol_list *sym_list)
 879 {
 880         struct symbol *sym;
 881
 882         FOR_EACH_PTR(sym_list, sym) {
 883                 split_sym(sym);
 884         } END_FOR_EACH_PTR(sym);
 885 }
 886
 887 typedef void (fake_cb)(struct expression *expr);
 888
 889 static int member_to_number(struct expression *expr, struct ident *member)
 890 {
 891         struct symbol *type, *tmp;
 892         char *name;
 893         int i;
 894
 895         if (!member)
 896                 return -1;
 897         name = member->name;
 898
 899         type = get_type(expr);
 900         if (!type || type->type != SYM_STRUCT)
 901                 return -1;
 902
 903         i = -1;
 904         FOR_EACH_PTR(type->symbol_list, tmp) {
 905                 i++;
 906                 if (!tmp->ident)
 907                         continue;
 908                 if (strcmp(name, tmp->ident->name) == 0)
 909                         return i;
 910         } END_FOR_EACH_PTR(tmp);
 911         return -1;
 912 }
 913
 914 static struct ident *number_to_member(struct expression *expr, int num)
 915 {
 916         struct symbol *type, *member;
 917         int i = 0;
 918
 919         type = get_type(expr);
 920         if (!type || type->type != SYM_STRUCT)
 921                 return NULL;
 922
 923         FOR_EACH_PTR(type->symbol_list, member) {
 924                 if (i == num)
 925                         return member->ident;
 926                 i++;
 927         } END_FOR_EACH_PTR(member);
 928         return NULL;
 929 }
 930
 931 static void fake_element_assigns_helper(struct expression *array, struct expression_list *expr_list, fake_cb *fake_cb);
 932
 933 struct member_set {
 934         struct ident *ident;
 935         int set;
 936 };
 937
 938 static struct member_set *alloc_member_set(struct symbol *type)
 939 {
 940         struct member_set *member_set;
 941         struct symbol *member;
 942         int member_count;
 943         int member_idx;
 944
 945         member_count = ptr_list_size((struct ptr_list *)type->symbol_list);
 946         member_set = malloc(member_count * sizeof(*member_set));
 947         member_idx = 0;
 948         FOR_EACH_PTR(type->symbol_list, member) {
 949                 member_set[member_idx].ident = member->ident;
 950                 member_set[member_idx].set = 0;
 951                 member_idx++;
 952         } END_FOR_EACH_PTR(member);
 953
 954         return member_set;
 955 }
 956
 957 static void mark_member_as_set(struct symbol *type, struct member_set *member_set, struct ident *ident)
 958 {
 959         int member_count = ptr_list_size((struct ptr_list *)type->symbol_list);
 960         int i;
 961
 962         for (i = 0; i < member_count; i++) {
 963                 if (member_set[i].ident == ident) {
 964                         member_set[i].set = 1;
 965                         return;
 966                 }
 967         }
 968 //      crap.  this is buggy.
 969 //      sm_msg("internal smatch error in initializer %s.%s", type->ident->name, ident->name);
 970 }
 971
 972 static void set_unset_to_zero(struct expression *symbol, struct symbol *type, struct member_set *member_set)
 973 {
 974         struct expression *deref, *assign;
 975         struct symbol *member, *member_type;
 976         int member_idx;
 977
 978         member_idx = 0;
 979         FOR_EACH_PTR(type->symbol_list, member) {
 980                 if (!member->ident || member_set[member_idx].set) {
 981                         member_idx++;
 982                         continue;
 983                 }
 984                 member_type = get_real_base_type(member);
 985                 if (!member_type || member_type->type == SYM_ARRAY) {
 986                         member_idx++;
 987                         continue;
 988                 }
 989                 /* TODO: this should be handled recursively and not ignored */
 990                 if (member_type->type == SYM_STRUCT || member_type->type == SYM_UNION) {
 991                         member_idx++;
 992                         continue;
 993                 }
 994                 deref = member_expression(symbol, '.', member->ident);
 995                 assign = assign_expression(deref, zero_expr());
 996                 __split_expr(assign);
 997                 member_idx++;
 998         } END_FOR_EACH_PTR(member);
 999
1000 }
1001
1002 static void fake_member_assigns_helper(struct expression *symbol, struct expression_list *members, fake_cb *fake_cb)
1003 {
1004         struct expression *deref, *assign, *tmp;
1005         struct symbol *struct_type, *type;
1006         struct ident *member;
1007         int member_idx;
1008         struct member_set *member_set;
1009
1010         struct_type = get_type(symbol);
1011         if (!struct_type ||
1012             (struct_type->type != SYM_STRUCT && struct_type->type != SYM_UNION))
1013                 return;
1014
1015         member_set = alloc_member_set(struct_type);
1016
1017         member_idx = 0;
1018         FOR_EACH_PTR(members, tmp) {
1019                 member = number_to_member(symbol, member_idx);
1020                 while (tmp->type == EXPR_IDENTIFIER) {
1021                         member = tmp->expr_ident;
1022                         member_idx = member_to_number(symbol, member);
1023                         tmp = tmp->ident_expression;
1024                 }
1025                 mark_member_as_set(struct_type, member_set, member);
1026                 member_idx++;
1027                 deref = member_expression(symbol, '.', member);
1028                 if (tmp->type == EXPR_INITIALIZER) {
1029                         type = get_type(deref);
1030                         if (type && type->type == SYM_ARRAY)
1031                                 fake_element_assigns_helper(deref, tmp->expr_list, fake_cb);
1032                         else
1033                                 fake_member_assigns_helper(deref, tmp->expr_list, fake_cb);
1034                 } else {
1035                         assign = assign_expression(deref, tmp);
1036                         fake_cb(assign);
1037                 }
1038         } END_FOR_EACH_PTR(tmp);
1039
1040         set_unset_to_zero(symbol, struct_type, member_set);
1041 }
1042
1043 static void fake_member_assigns(struct symbol *sym, fake_cb *fake_cb)
1044 {
1045         fake_member_assigns_helper(symbol_expression(sym),
1046                                    sym->initializer->expr_list, fake_cb);
1047 }
1048
1049 static void fake_element_assigns_helper(struct expression *array, struct expression_list *expr_list, fake_cb *fake_cb)
1050 {
1051         struct expression *offset, *binop, *assign, *tmp;
1052         struct symbol *type;
1053         int idx;
1054
1055         idx = 0;
1056         FOR_EACH_PTR(expr_list, tmp) {
1057                 if (tmp->type == EXPR_INDEX) {
1058                         if (tmp->idx_from != tmp->idx_to)
1059                                 return;
1060                         idx = tmp->idx_from;
1061                         if (!tmp->idx_expression)
1062                                 goto next;
1063                         tmp = tmp->idx_expression;
1064                 }
1065                 offset = value_expr(idx);
1066                 binop = array_element_expression(array, offset);
1067                 if (tmp->type == EXPR_INITIALIZER) {
1068                         type = get_type(binop);
1069                         if (type && type->type == SYM_ARRAY)
1070                                 fake_element_assigns_helper(binop, tmp->expr_list, fake_cb);
1071                         else
1072                                 fake_member_assigns_helper(binop, tmp->expr_list, fake_cb);
1073                 } else {
1074                         assign = assign_expression(binop, tmp);
1075                         fake_cb(assign);
1076                 }
1077 next:
1078                 idx++;
1079         } END_FOR_EACH_PTR(tmp);
1080 }
1081
1082 static void fake_element_assigns(struct symbol *sym, fake_cb *fake_cb)
1083 {
1084         fake_element_assigns_helper(symbol_expression(sym), sym->initializer->expr_list, fake_cb);
1085 }
1086
1087 static void fake_assign_expr(struct symbol *sym)
1088 {
1089         struct expression *assign, *symbol;
1090
1091         symbol = symbol_expression(sym);
1092         assign = assign_expression(symbol, sym->initializer);
1093         __split_expr(assign);
1094 }
1095
1096 static void call_split_expr(struct expression *expr)
1097 {
1098         __split_expr(expr);
1099 }
1100
1101 static void do_initializer_stuff(struct symbol *sym)
1102 {
1103         if (!sym->initializer)
1104                 return;
1105
1106         if (sym->initializer->type == EXPR_INITIALIZER) {
1107                 if (get_real_base_type(sym)->type == SYM_ARRAY)
1108                         fake_element_assigns(sym, call_split_expr);
1109                 else
1110                         fake_member_assigns(sym, call_split_expr);
1111         } else {
1112                 fake_assign_expr(sym);
1113         }
1114 }
1115
1116 static void split_declaration(struct symbol_list *sym_list)
1117 {
1118         struct symbol *sym;
1119
1120         FOR_EACH_PTR(sym_list, sym) {
1121                 __pass_to_client(sym, DECLARATION_HOOK);
1122                 do_initializer_stuff(sym);
1123                 split_sym(sym);
1124         } END_FOR_EACH_PTR(sym);
1125 }
1126
1127 static void call_global_assign_hooks(struct expression *assign)
1128 {
1129         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1130 }
1131
1132 static void fake_global_assign(struct symbol *sym)
1133 {
1134         struct expression *assign, *symbol;
1135
1136         if (get_real_base_type(sym)->type == SYM_ARRAY) {
1137                 if (sym->initializer && sym->initializer->type == EXPR_INITIALIZER) {
1138                         fake_element_assigns(sym, call_global_assign_hooks);
1139                 } else if (sym->initializer) {
1140                         symbol = symbol_expression(sym);
1141                         assign = assign_expression(symbol, sym->initializer);
1142                         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1143                 } else {
1144                         fake_element_assigns_helper(symbol_expression(sym), NULL, call_global_assign_hooks);
1145                 }
1146         } else if (get_real_base_type(sym)->type == SYM_STRUCT) {
1147                 if (sym->initializer && sym->initializer->type == EXPR_INITIALIZER) {
1148                         fake_member_assigns(sym, call_global_assign_hooks);
1149                 } else if (sym->initializer) {
1150                         symbol = symbol_expression(sym);
1151                         assign = assign_expression(symbol, sym->initializer);
1152                         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1153                 } else {
1154                         fake_member_assigns_helper(symbol_expression(sym), NULL, call_global_assign_hooks);
1155                 }
1156         } else {
1157                 symbol = symbol_expression(sym);
1158                 if (sym->initializer)
1159                         assign = assign_expression(symbol, sym->initializer);
1160                 else
1161                         assign = assign_expression(symbol, zero_expr());
1162                 __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1163         }
1164 }
1165
1166 static void start_function_definition(struct symbol *sym)
1167 {
1168         __in_function_def = 1;
1169         __pass_to_client(sym, FUNC_DEF_HOOK);
1170         __in_function_def = 0;
1171         __pass_to_client(sym, AFTER_DEF_HOOK);
1172
1173 }
1174
1175 static void split_function(struct symbol *sym)
1176 {
1177         struct symbol *base_type = get_base_type(sym);
1178
1179         if (!base_type->stmt && !base_type->inline_stmt)
1180                 return;
1181
1182         gettimeofday(&fn_start_time, NULL);
1183         cur_func_sym = sym;
1184         if (sym->ident)
1185                 cur_func = sym->ident->name;
1186         __smatch_lineno = sym->pos.line;
1187         loop_count = 0;
1188         last_goto_statement_handled = 0;
1189         sm_debug("new function:  %s\n", cur_func);
1190         __stree_id = 0;
1191         if (option_two_passes) {
1192                 __unnullify_path();
1193                 loop_num = 0;
1194                 final_pass = 0;
1195                 start_function_definition(sym);
1196                 __split_stmt(base_type->stmt);
1197                 __split_stmt(base_type->inline_stmt);
1198                 nullify_path();
1199         }
1200         __unnullify_path();
1201         loop_num = 0;
1202         final_pass = 1;
1203         start_function_definition(sym);
1204         __split_stmt(base_type->stmt);
1205         __split_stmt(base_type->inline_stmt);
1206         __pass_to_client(sym, END_FUNC_HOOK);
1207         __pass_to_client(sym, AFTER_FUNC_HOOK);
1208
1209         cur_func_sym = NULL;
1210         cur_func = NULL;
1211         clear_all_states();
1212         free_data_info_allocs();
1213         free_expression_stack(&switch_expr_stack);
1214         __free_ptr_list((struct ptr_list **)&big_statement_stack);
1215         __bail_on_rest_of_function = 0;
1216 }
1217
1218 static void parse_inline(struct expression *call)
1219 {
1220         struct symbol *base_type;
1221         int loop_num_bak = loop_num;
1222         int final_pass_bak = final_pass;
1223         char *cur_func_bak = cur_func;
1224         struct statement_list *big_statement_stack_bak = big_statement_stack;
1225         struct expression_list *big_expression_stack_bak = big_expression_stack;
1226         struct expression_list *switch_expr_stack_bak = switch_expr_stack;
1227         struct symbol *cur_func_sym_bak = cur_func_sym;
1228
1229         __pass_to_client(call, INLINE_FN_START);
1230         final_pass = 0;  /* don't print anything */
1231         __inline_fn = call;
1232
1233         base_type = get_base_type(call->fn->symbol);
1234         cur_func_sym = call->fn->symbol;
1235         if (call->fn->symbol->ident)
1236                 cur_func = call->fn->symbol->ident->name;
1237         else
1238                 cur_func = NULL;
1239         set_position(call->fn->symbol->pos);
1240
1241         save_all_states();
1242         big_statement_stack = NULL;
1243         big_expression_stack = NULL;
1244         switch_expr_stack = NULL;
1245
1246         sm_debug("inline function:  %s\n", cur_func);
1247         __unnullify_path();
1248         loop_num = 0;
1249         start_function_definition(call->fn->symbol);
1250         __split_stmt(base_type->stmt);
1251         __split_stmt(base_type->inline_stmt);
1252         __pass_to_client(call->fn->symbol, END_FUNC_HOOK);
1253         __pass_to_client(call->fn->symbol, AFTER_FUNC_HOOK);
1254
1255         free_expression_stack(&switch_expr_stack);
1256         __free_ptr_list((struct ptr_list **)&big_statement_stack);
1257         nullify_path();
1258         free_goto_stack();
1259
1260         loop_num = loop_num_bak;
1261         final_pass = final_pass_bak;
1262         cur_func_sym = cur_func_sym_bak;
1263         cur_func = cur_func_bak;
1264         big_statement_stack = big_statement_stack_bak;
1265         big_expression_stack = big_expression_stack_bak;
1266         switch_expr_stack = switch_expr_stack_bak;
1267
1268         restore_all_states();
1269         set_position(call->pos);
1270         __inline_fn = NULL;
1271         __pass_to_client(call, INLINE_FN_END);
1272 }
1273
1274 static struct symbol_list *inlines_called;
1275 static void add_inline_function(struct symbol *sym)
1276 {
1277         static struct symbol_list *already_added;
1278         struct symbol *tmp;
1279
1280         FOR_EACH_PTR(already_added, tmp) {
1281                 if (tmp == sym)
1282                         return;
1283         } END_FOR_EACH_PTR(tmp);
1284
1285         add_ptr_list(&already_added, sym);
1286         add_ptr_list(&inlines_called, sym);
1287 }
1288
1289 static void process_inlines(void)
1290 {
1291         struct symbol *tmp;
1292
1293         FOR_EACH_PTR(inlines_called, tmp) {
1294                 split_function(tmp);
1295         } END_FOR_EACH_PTR(tmp);
1296         free_ptr_list(&inlines_called);
1297 }
1298
1299 static struct symbol *get_last_scoped_symbol(struct symbol_list *big_list, int use_static)
1300 {
1301         struct symbol *sym;
1302
1303         FOR_EACH_PTR_REVERSE(big_list, sym) {
1304                 if (!sym->scope)
1305                         continue;
1306                 if (use_static && sym->ctype.modifiers & MOD_STATIC)
1307                         return sym;
1308                 if (!use_static && !(sym->ctype.modifiers & MOD_STATIC))
1309                         return sym;
1310         } END_FOR_EACH_PTR_REVERSE(sym);
1311
1312         return NULL;
1313 }
1314
1315 static void split_inlines_in_scope(struct symbol *sym)
1316 {
1317         struct symbol *base;
1318         struct symbol_list *scope_list;
1319         int stream;
1320
1321         scope_list = sym->scope->symbols;
1322         stream = sym->pos.stream;
1323
1324         /* find the last static symbol in the file */
1325         FOR_EACH_PTR_REVERSE(scope_list, sym) {
1326                 if (sym->pos.stream != stream)
1327                         continue;
1328                 if (sym->type != SYM_NODE)
1329                         continue;
1330                 base = get_base_type(sym);
1331                 if (!base)
1332                         continue;
1333                 if (base->type != SYM_FN)
1334                         continue;
1335                 if (!base->inline_stmt)
1336                         continue;
1337                 add_inline_function(sym);
1338         } END_FOR_EACH_PTR_REVERSE(sym);
1339
1340         process_inlines();
1341 }
1342
1343 static void split_inlines(struct symbol_list *sym_list)
1344 {
1345         struct symbol *sym;
1346
1347         sym = get_last_scoped_symbol(sym_list, 0);
1348         if (sym)
1349                 split_inlines_in_scope(sym);
1350         sym = get_last_scoped_symbol(sym_list, 1);
1351         if (sym)
1352                 split_inlines_in_scope(sym);
1353 }
1354
1355 static struct stree *clone_estates_perm(struct stree *orig)
1356 {
1357         struct stree *ret = NULL;
1358         struct sm_state *tmp;
1359
1360         FOR_EACH_SM(orig, tmp) {
1361                 set_state_stree_perm(&ret, tmp->owner, tmp->name, tmp->sym, clone_estate_perm(tmp->state));
1362         } END_FOR_EACH_SM(tmp);
1363
1364         return ret;
1365 }
1366
1367 static void split_functions(struct symbol_list *sym_list)
1368 {
1369         struct symbol *sym;
1370
1371         __unnullify_path();
1372         FOR_EACH_PTR(sym_list, sym) {
1373                 set_position(sym->pos);
1374                 if (sym->type != SYM_NODE || get_base_type(sym)->type != SYM_FN) {
1375                         __pass_to_client(sym, BASE_HOOK);
1376                         fake_global_assign(sym);
1377                 }
1378         } END_FOR_EACH_PTR(sym);
1379         global_states = clone_estates_perm(get_all_states_stree(SMATCH_EXTRA));
1380         nullify_path();
1381
1382         FOR_EACH_PTR(sym_list, sym) {
1383                 set_position(sym->pos);
1384                 if (sym->type == SYM_NODE && get_base_type(sym)->type == SYM_FN) {
1385                         split_function(sym);
1386                         process_inlines();
1387                 }
1388         } END_FOR_EACH_PTR(sym);
1389         split_inlines(sym_list);
1390         __pass_to_client(sym_list, END_FILE_HOOK);
1391 }
1392
1393 void smatch(int argc, char **argv)
1394 {
1395
1396         struct string_list *filelist = NULL;
1397         struct symbol_list *sym_list;
1398
1399         if (argc < 2) {
1400                 printf("Usage:  smatch [--debug] <filename.c>\n");
1401                 exit(1);
1402         }
1403         sparse_initialize(argc, argv, &filelist);
1404         set_valid_ptr_max();
1405         FOR_EACH_PTR_NOTAG(filelist, base_file) {
1406                 if (option_file_output) {
1407                         char buf[256];
1408
1409                         snprintf(buf, sizeof(buf), "%s.smatch", base_file);
1410                         sm_outfd = fopen(buf, "w");
1411                         if (!sm_outfd) {
1412                                 printf("Error:  Cannot open %s\n", base_file);
1413                                 exit(1);
1414                         }
1415                 }
1416                 sym_list = sparse_keep_tokens(base_file);
1417                 split_functions(sym_list);
1418         } END_FOR_EACH_PTR_NOTAG(base_file);
1419 }