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