smatch_flow.c

   1 /*
   2  * sparse/smatch_flow.c
   3  *
   4  * Copyright (C) 2006,2008 Dan Carpenter.
   5  *
   6  *  Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #define _GNU_SOURCE 1
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include "token.h"
  14 #include "smatch.h"
  15 #include "smatch_expression_stacks.h"
  16 #include "smatch_extra.h"
  17 #include "smatch_slist.h"
  18
  19 int final_pass;
  20
  21 static int __smatch_lineno = 0;
  22
  23 static const char *filename;
  24 static char *pathname;
  25 static char *full_filename;
  26 static char *cur_func;
  27 static int line_func_start;
  28 static int loop_count;
  29 int __expr_stmt_count;
  30 static struct expression_list *switch_expr_stack = NULL;
  31
  32 struct expression_list *big_expression_stack;
  33 struct statement_list *big_statement_stack;
  34 int __in_pre_condition = 0;
  35 int __bail_on_rest_of_function = 0;
  36 char *get_function(void) { return cur_func; }
  37 int get_lineno(void) { return __smatch_lineno; }
  38 int get_func_pos(void) { return __smatch_lineno - line_func_start; }
  39 int inside_loop(void) { return !!loop_count; }
  40 int in_expression_statement(void) { return !!__expr_stmt_count; }
  41
  42 static void split_symlist(struct symbol_list *sym_list);
  43 static void split_declaration(struct symbol_list *sym_list);
  44 static void split_expr_list(struct expression_list *expr_list);
  45 static void add_inline_function(struct symbol *sym);
  46
  47 int option_assume_loops = 0;
  48 int option_known_conditions = 0;
  49 int option_two_passes = 0;
  50 struct symbol *cur_func_sym = NULL;
  51
  52 const char *get_filename(void)
  53 {
  54         if (option_full_path)
  55                 return full_filename;
  56         return filename;
  57 }
  58
  59 static void set_position(struct expression *expr)
  60 {
  61         int len;
  62         static int prev_stream = -1;
  63
  64         __smatch_lineno = expr->pos.line;
  65
  66         if (expr->pos.stream == prev_stream)
  67                 return;
  68
  69         filename = stream_name(expr->pos.stream);
  70
  71         free(full_filename);
  72         pathname = getcwd(NULL, 0);
  73         if (pathname) {
  74                 len = strlen(pathname) + 1 + strlen(filename) + 1;
  75                 full_filename = malloc(len);
  76                 snprintf(full_filename, len, "%s/%s", pathname, filename);
  77         } else {
  78                 full_filename = alloc_string(filename);
  79         }
  80         free(pathname);
  81 }
  82
  83 static int is_inline_func(struct expression *expr)
  84 {
  85         if (expr->type != EXPR_SYMBOL || !expr->symbol)
  86                 return 0;
  87         if (expr->symbol->ctype.modifiers & MOD_INLINE)
  88                 return 1;
  89         return 0;
  90 }
  91
  92 void __split_expr(struct expression *expr)
  93 {
  94         if (!expr)
  95                 return;
  96
  97         // sm_msg(" Debug expr_type %d %s", expr->type, show_special(expr->op));
  98
  99         push_expression(&big_expression_stack, expr);
 100         set_position(expr);
 101         __pass_to_client(expr, EXPR_HOOK);
 102
 103         switch (expr->type) {
 104         case EXPR_PREOP:
 105                 if (expr->op == '*')
 106                         __pass_to_client(expr, DEREF_HOOK);
 107         case EXPR_POSTOP:
 108                 __pass_to_client(expr, OP_HOOK);
 109                 __split_expr(expr->unop);
 110                 break;
 111         case EXPR_STATEMENT:
 112                 __expr_stmt_count++;
 113                 __split_stmt(expr->statement);
 114                 __expr_stmt_count--;
 115                 break;
 116         case EXPR_LOGICAL:
 117         case EXPR_COMPARE:
 118                 __pass_to_client(expr, LOGIC_HOOK);
 119                 __handle_logic(expr);
 120                 break;
 121         case EXPR_BINOP:
 122                 __pass_to_client(expr, BINOP_HOOK);
 123         case EXPR_COMMA:
 124                 __split_expr(expr->left);
 125                 __split_expr(expr->right);
 126                 break;
 127         case EXPR_ASSIGNMENT: {
 128                 struct expression *tmp;
 129
 130                 /* foo = !bar() */
 131                 if (__handle_condition_assigns(expr))
 132                         break;
 133
 134                 /* foo = (x < 5 ? foo : 5); */
 135                 if (__handle_select_assigns(expr))
 136                         break;
 137
 138                 /* foo = ({frob(); frob(); frob(); 1;}) */
 139                 if (__handle_expr_statement_assigns(expr))
 140                         break;
 141
 142                 __split_expr(expr->right);
 143                 __pass_to_client(expr, ASSIGNMENT_HOOK);
 144                 tmp = strip_expr(expr->right);
 145                 if (tmp->type == EXPR_CALL)
 146                         __pass_to_client(expr, CALL_ASSIGNMENT_HOOK);
 147                 if (get_macro_name(&tmp->pos))
 148                         __pass_to_client(expr, MACRO_ASSIGNMENT_HOOK);
 149                 __split_expr(expr->left);
 150                 break;
 151         }
 152         case EXPR_DEREF:
 153                 __pass_to_client(expr, DEREF_HOOK);
 154                 __split_expr(expr->deref);
 155                 break;
 156         case EXPR_SLICE:
 157                 __split_expr(expr->base);
 158                 break;
 159         case EXPR_CAST:
 160         case EXPR_FORCE_CAST:
 161                 __split_expr(expr->cast_expression);
 162                 break;
 163         case EXPR_SIZEOF:
 164                 /* there isn't anything to pass a client from inside a sizeof() */
 165                 break;
 166         case EXPR_CONDITIONAL:
 167         case EXPR_SELECT:
 168                 __split_whole_condition(expr->conditional);
 169                 __split_expr(expr->cond_true);
 170                 __push_true_states();
 171                 __use_false_states();
 172                 __split_expr(expr->cond_false);
 173                 __merge_true_states();
 174                 break;
 175         case EXPR_CALL:
 176                 split_expr_list(expr->args);
 177                 __split_expr(expr->fn);
 178                 if (is_inline_func(expr->fn))
 179                         add_inline_function(expr->fn->symbol);
 180                 __pass_to_client(expr, FUNCTION_CALL_HOOK);
 181                 break;
 182         case EXPR_INITIALIZER:
 183                 split_expr_list(expr->expr_list);
 184                 break;
 185         case EXPR_IDENTIFIER:
 186                 __split_expr(expr->ident_expression);
 187                 break;
 188         case EXPR_INDEX:
 189                 __split_expr(expr->idx_expression);
 190                 break;
 191         case EXPR_POS:
 192                 __split_expr(expr->init_expr);
 193                 break;
 194         case EXPR_SYMBOL:
 195                 __pass_to_client(expr, SYM_HOOK);
 196                 break;
 197         case EXPR_STRING:
 198                 __pass_to_client(expr, STRING_HOOK);
 199                 break;
 200         default:
 201                 break;
 202         };
 203         pop_expression(&big_expression_stack);
 204 }
 205
 206 static int is_forever_loop(struct statement *stmt)
 207 {
 208
 209         struct expression *expr;
 210
 211         expr = strip_expr(stmt->iterator_pre_condition);
 212         if (!expr)
 213                 expr = stmt->iterator_post_condition;
 214         if (!expr) {
 215                 /* this is a for(;;) loop... */
 216                 return 1;
 217         }
 218
 219         if (expr->type == EXPR_VALUE && expr->value == 1) {
 220                 return 1;
 221         }
 222
 223         return 0;
 224 }
 225
 226 static int loop_num;
 227 static char *get_loop_name(int num)
 228 {
 229         char buf[256];
 230
 231         snprintf(buf, 255, "-loop%d", num);
 232         buf[255] = '\0';
 233         return alloc_sname(buf);;
 234 }
 235
 236 /*
 237  * Pre Loops are while and for loops.
 238  */
 239
 240 static void handle_pre_loop(struct statement *stmt)
 241 {
 242         int once_through; /* we go through the loop at least once */
 243         struct sm_state *extra_sm = NULL;
 244         int unchanged = 0;
 245         char *loop_name;
 246         struct state_list *slist = NULL;
 247         struct sm_state *sm = NULL;
 248
 249         loop_name = get_loop_name(loop_num);
 250         loop_num++;
 251
 252         __split_stmt(stmt->iterator_pre_statement);
 253
 254         once_through = implied_condition_true(stmt->iterator_pre_condition);
 255
 256         loop_count++;
 257         __push_continues();
 258         __push_breaks();
 259
 260         __merge_gotos(loop_name);
 261
 262         extra_sm = __extra_handle_canonical_loops(stmt, &slist);
 263         __in_pre_condition++;
 264         __split_whole_condition(stmt->iterator_pre_condition);
 265         __in_pre_condition--;
 266         FOR_EACH_PTR(slist, sm) {
 267                 set_state(sm->owner, sm->name, sm->sym, sm->state);
 268         } END_FOR_EACH_PTR(sm);
 269         free_slist(&slist);
 270         if (extra_sm)
 271                 extra_sm = get_sm_state(extra_sm->owner, extra_sm->name, extra_sm->sym);
 272
 273         if (option_assume_loops)
 274                 once_through = 1;
 275
 276         __split_stmt(stmt->iterator_statement);
 277         __warn_on_silly_pre_loops();
 278         if (is_forever_loop(stmt)) {
 279                 __save_gotos(loop_name);
 280                 /* forever loops don't have an iterator_post_statement */
 281                 __discard_continues();
 282                 __discard_false_states();
 283                 __use_breaks();
 284         } else {
 285                 __merge_continues();
 286                 unchanged = __iterator_unchanged(extra_sm);
 287                 __split_stmt(stmt->iterator_post_statement);
 288                 __save_gotos(loop_name);
 289                 __split_whole_condition(stmt->iterator_pre_condition);
 290                 nullify_path();
 291                 __merge_false_states();
 292                 if (once_through) {
 293                         __discard_false_states();
 294                 } else {
 295                         __merge_false_states();
 296
 297                 }
 298                 if (extra_sm && unchanged)
 299                         __extra_pre_loop_hook_after(extra_sm,
 300                                                 stmt->iterator_post_statement,
 301                                                 stmt->iterator_pre_condition);
 302                 __merge_breaks();
 303         }
 304         loop_count--;
 305 }
 306
 307 /*
 308  * Post loops are do {} while();
 309  */
 310 static void handle_post_loop(struct statement *stmt)
 311 {
 312         char *loop_name;
 313
 314         loop_name = get_loop_name(loop_num);
 315         loop_num++;
 316         loop_count++;
 317
 318         __push_continues();
 319         __push_breaks();
 320         __merge_gotos(loop_name);
 321         __split_stmt(stmt->iterator_statement);
 322         __merge_continues();
 323         if (!is_zero(stmt->iterator_post_condition))
 324                 __save_gotos(loop_name);
 325
 326         if (is_forever_loop(stmt)) {
 327                 __use_breaks();
 328         } else {
 329                 __split_whole_condition(stmt->iterator_post_condition);
 330                 __use_false_states();
 331                 __merge_breaks();
 332         }
 333         loop_count--;
 334 }
 335
 336 static int empty_statement(struct statement *stmt)
 337 {
 338         if (!stmt)
 339                 return 0;
 340         if (stmt->type == STMT_EXPRESSION && !stmt->expression)
 341                 return 1;
 342         return 0;
 343 }
 344
 345 static int last_stmt_on_same_line()
 346 {
 347         struct statement *stmt;
 348         int i = 0;
 349
 350         FOR_EACH_PTR_REVERSE(big_statement_stack, stmt) {
 351                 if (!i++)
 352                         continue;
 353                 if  (stmt->pos.line == get_lineno())
 354                         return 1;
 355                 return 0;
 356         } END_FOR_EACH_PTR_REVERSE(stmt);
 357         return 0;
 358 }
 359
 360 static struct statement *last_stmt;
 361 static int is_last_stmt(struct statement *stmt)
 362 {
 363         if (stmt == last_stmt)
 364                 return 1;
 365         return 0;
 366 }
 367
 368 static void print_unreached_initializers(struct symbol_list *sym_list)
 369 {
 370         struct symbol *sym;
 371
 372         FOR_EACH_PTR(sym_list, sym) {
 373                 if(sym->initializer)
 374                         sm_msg("info: '%s' is not actually initialized (unreached code).",
 375                                 (sym->ident ? sym->ident->name : "this variable"));
 376         } END_FOR_EACH_PTR(sym);
 377 }
 378
 379 static void print_unreached(struct statement *stmt)
 380 {
 381
 382         static int print = 1;
 383
 384         if (!__path_is_null()) {
 385                 print = 1;
 386                 return;
 387         }
 388         if (!print)
 389                 return;
 390
 391         switch (stmt->type) {
 392         case STMT_COMPOUND: /* after a switch before a case stmt */
 393         case STMT_RANGE:
 394         case STMT_CASE:
 395         case STMT_LABEL:
 396                 return;
 397         case STMT_DECLARATION: /* switch (x) { int a; case foo: ... */
 398                 print_unreached_initializers(stmt->declaration);
 399                 return;
 400         case STMT_RETURN: /* gcc complains if you don't have a return statement */
 401                 if (is_last_stmt(stmt))
 402                         return;
 403                 break;
 404         case STMT_GOTO:
 405                 if (!option_spammy)
 406                         return;
 407                 break;
 408         default:
 409                 break;
 410         }
 411         if (!option_spammy && empty_statement(stmt))
 412                 return;
 413         sm_msg("info: ignoring unreachable code.");
 414         print = 0;
 415 }
 416
 417 static void split_asm_constraints(struct expression_list *expr_list)
 418 {
 419         struct expression *expr;
 420         int state = 0;
 421
 422         FOR_EACH_PTR(expr_list, expr) {
 423                 switch (state) {
 424                 case 0: /* identifier */
 425                 case 1: /* constraint */
 426                         state++;
 427                         continue;
 428                 case 2: /* expression */
 429                         state = 0;
 430                         __split_expr(expr);
 431                         continue;
 432                 }
 433         } END_FOR_EACH_PTR(expr);
 434 }
 435
 436 void __split_stmt(struct statement *stmt)
 437 {
 438         if (!stmt)
 439                 return;
 440
 441         if (out_of_memory() || __bail_on_rest_of_function) {
 442                 static char *printed = NULL;
 443
 444                 if (printed != cur_func)
 445                         sm_msg("Function too hairy.  Giving up.");
 446                 printed = cur_func;
 447                 return;
 448         }
 449
 450         add_ptr_list(&big_statement_stack, stmt);
 451         free_expression_stack(&big_expression_stack);
 452         __smatch_lineno = stmt->pos.line;
 453         print_unreached(stmt);
 454         __pass_to_client(stmt, STMT_HOOK);
 455
 456         switch (stmt->type) {
 457         case STMT_DECLARATION:
 458                 split_declaration(stmt->declaration);
 459                 return;
 460         case STMT_RETURN:
 461                 __split_expr(stmt->ret_value);
 462                 __pass_to_client(stmt->ret_value, RETURN_HOOK);
 463                 nullify_path();
 464                 return;
 465         case STMT_EXPRESSION:
 466                 __split_expr(stmt->expression);
 467                 return;
 468         case STMT_COMPOUND: {
 469                 struct statement *tmp;
 470
 471                 if (!last_stmt)
 472                         last_stmt = last_ptr_list((struct ptr_list *)stmt->stmts);
 473                 __push_scope_hooks();
 474                 FOR_EACH_PTR(stmt->stmts, tmp) {
 475                         __split_stmt(tmp);
 476                 } END_FOR_EACH_PTR(tmp);
 477                 __call_scope_hooks();
 478                 return;
 479         }
 480         case STMT_IF:
 481                 if (known_condition_true(stmt->if_conditional)) {
 482                         __split_stmt(stmt->if_true);
 483                         return;
 484                 }
 485                 if (known_condition_false(stmt->if_conditional)) {
 486                         __split_stmt(stmt->if_false);
 487                         return;
 488                 }
 489                 if (option_known_conditions &&
 490                     implied_condition_true(stmt->if_conditional)) {
 491                         sm_info("this condition is true.");
 492                         __split_stmt(stmt->if_true);
 493                         return;
 494                 }
 495                 if (option_known_conditions &&
 496                     implied_condition_false(stmt->if_conditional)) {
 497                         sm_info("this condition is false.");
 498                         __split_stmt(stmt->if_false);
 499                         return;
 500                 }
 501                 __split_whole_condition(stmt->if_conditional);
 502                 __split_stmt(stmt->if_true);
 503                 if (empty_statement(stmt->if_true) &&
 504                         last_stmt_on_same_line() &&
 505                         !get_macro_name(&stmt->if_true->pos))
 506                         sm_msg("warn: if();");
 507                 __push_true_states();
 508                 __use_false_states();
 509                 __split_stmt(stmt->if_false);
 510                 __merge_true_states();
 511                 return;
 512         case STMT_ITERATOR:
 513                 if (stmt->iterator_pre_condition)
 514                         handle_pre_loop(stmt);
 515                 else if (stmt->iterator_post_condition)
 516                         handle_post_loop(stmt);
 517                 else {
 518                         // these are for(;;) type loops.
 519                         handle_pre_loop(stmt);
 520                 }
 521                 return;
 522         case STMT_SWITCH:
 523                 __split_expr(stmt->switch_expression);
 524                 push_expression(&switch_expr_stack, stmt->switch_expression);
 525                 __save_switch_states(top_expression(switch_expr_stack));
 526                 nullify_path();
 527                 __push_default();
 528                 __push_breaks();
 529                 __split_stmt(stmt->switch_statement);
 530                 if (!__pop_default())
 531                         __merge_switches(top_expression(switch_expr_stack),
 532                                       NULL);
 533                 __discard_switches();
 534                 __merge_breaks();
 535                 pop_expression(&switch_expr_stack);
 536                 return;
 537         case STMT_CASE:
 538                 __merge_switches(top_expression(switch_expr_stack),
 539                                       stmt->case_expression);
 540                 __pass_case_to_client(top_expression(switch_expr_stack),
 541                                       stmt->case_expression);
 542                 if (!stmt->case_expression)
 543                         __set_default();
 544                 __split_expr(stmt->case_expression);
 545                 __split_expr(stmt->case_to);
 546                 __split_stmt(stmt->case_statement);
 547                 return;
 548         case STMT_LABEL:
 549                 if (stmt->label &&
 550                     stmt->label->type == SYM_LABEL &&
 551                     stmt->label->ident) {
 552                         loop_count = 1000000;
 553                         __merge_gotos(stmt->label->ident->name);
 554                 }
 555                 __split_stmt(stmt->label_statement);
 556                 return;
 557         case STMT_GOTO:
 558                 __split_expr(stmt->goto_expression);
 559                 if (stmt->goto_label && stmt->goto_label->type == SYM_NODE) {
 560                         if (!strcmp(stmt->goto_label->ident->name, "break")) {
 561                                 __process_breaks();
 562                         } else if (!strcmp(stmt->goto_label->ident->name,
 563                                            "continue")) {
 564                                 __process_continues();
 565                         }
 566                 } else if (stmt->goto_label &&
 567                            stmt->goto_label->type == SYM_LABEL &&
 568                            stmt->goto_label->ident) {
 569                         __save_gotos(stmt->goto_label->ident->name);
 570                 }
 571                 nullify_path();
 572                 return;
 573         case STMT_NONE:
 574                 return;
 575         case STMT_ASM:
 576                 __split_expr(stmt->asm_string);
 577                 split_asm_constraints(stmt->asm_outputs);
 578                 split_asm_constraints(stmt->asm_inputs);
 579                 split_asm_constraints(stmt->asm_clobbers);
 580                 return;
 581         case STMT_CONTEXT:
 582                 return;
 583         case STMT_RANGE:
 584                 __split_expr(stmt->range_expression);
 585                 __split_expr(stmt->range_low);
 586                 __split_expr(stmt->range_high);
 587                 return;
 588         }
 589 }
 590
 591 static void split_expr_list(struct expression_list *expr_list)
 592 {
 593         struct expression *expr;
 594
 595         FOR_EACH_PTR(expr_list, expr) {
 596                 __split_expr(expr);
 597         } END_FOR_EACH_PTR(expr);
 598 }
 599
 600
 601 static void split_sym(struct symbol *sym)
 602 {
 603         if (!sym)
 604                 return;
 605         if (!(sym->namespace & NS_SYMBOL))
 606                 return;
 607
 608         __split_stmt(sym->stmt);
 609         __split_expr(sym->array_size);
 610         split_symlist(sym->arguments);
 611         split_symlist(sym->symbol_list);
 612         __split_stmt(sym->inline_stmt);
 613         split_symlist(sym->inline_symbol_list);
 614 }
 615
 616 static void split_symlist(struct symbol_list *sym_list)
 617 {
 618         struct symbol *sym;
 619
 620         FOR_EACH_PTR(sym_list, sym) {
 621                 split_sym(sym);
 622         } END_FOR_EACH_PTR(sym);
 623 }
 624
 625 static struct expression *fake_assign_expr(struct symbol *sym)
 626 {
 627         struct expression *e_assign, *e_symbol;
 628
 629         e_assign = alloc_expression(sym->initializer->pos, EXPR_ASSIGNMENT);
 630         e_symbol = alloc_expression(sym->initializer->pos, EXPR_SYMBOL);
 631         e_assign->op = (int)'=';
 632         e_symbol->symbol = sym;
 633         e_symbol->symbol_name = sym->ident;
 634         e_assign->left = e_symbol;
 635         e_assign->right = sym->initializer;
 636         return e_assign;
 637 }
 638
 639 static void do_initializer_stuff(struct symbol *sym)
 640 {
 641         struct expression *assign;
 642
 643         if(!sym->initializer)
 644                 return;
 645         assign = fake_assign_expr(sym);
 646         __split_expr(assign);
 647 }
 648
 649 static void split_declaration(struct symbol_list *sym_list)
 650 {
 651         struct symbol *sym;
 652
 653         FOR_EACH_PTR(sym_list, sym) {
 654                 __pass_to_client(sym, DECLARATION_HOOK);
 655                 do_initializer_stuff(sym);
 656                 split_sym(sym);
 657         } END_FOR_EACH_PTR(sym);
 658 }
 659
 660 static void split_function(struct symbol *sym)
 661 {
 662         struct symbol *base_type = get_base_type(sym);
 663
 664         cur_func_sym = sym;
 665         if (base_type->stmt)
 666                 line_func_start = base_type->stmt->pos.line;
 667         if (sym->ident)
 668                 cur_func = sym->ident->name;
 669         __smatch_lineno = sym->pos.line;
 670         last_stmt = NULL;
 671         loop_count = 0;
 672         sm_debug("new function:  %s\n", cur_func);
 673         if (option_two_passes) {
 674                 __unnullify_path();
 675                 loop_num = 0;
 676                 final_pass = 0;
 677                 __pass_to_client(sym, FUNC_DEF_HOOK);
 678                 __split_stmt(base_type->stmt);
 679                 __split_stmt(base_type->inline_stmt);
 680                 nullify_path();
 681         }
 682         __unnullify_path();
 683         loop_num = 0;
 684         final_pass = 1;
 685         __pass_to_client(sym, FUNC_DEF_HOOK);
 686         __split_stmt(base_type->stmt);
 687         __split_stmt(base_type->inline_stmt);
 688         __pass_to_client(sym, END_FUNC_HOOK);
 689         cur_func = NULL;
 690         line_func_start = 0;
 691         clear_all_states();
 692         free_data_info_allocs();
 693         free_expression_stack(&switch_expr_stack);
 694         __free_ptr_list((struct ptr_list **)&big_statement_stack);
 695         __bail_on_rest_of_function = 0;
 696 }
 697
 698 static struct symbol_list *inlines_called;
 699 static void add_inline_function(struct symbol *sym)
 700 {
 701         static struct symbol_list *already_added;
 702         struct symbol *tmp;
 703
 704         FOR_EACH_PTR(already_added, tmp) {
 705                 if (tmp == sym)
 706                         return;
 707         } END_FOR_EACH_PTR(tmp);
 708
 709         add_ptr_list(&already_added, sym);
 710         add_ptr_list(&inlines_called, sym);
 711 }
 712
 713 static void process_inlines()
 714 {
 715         struct symbol *tmp;
 716
 717         FOR_EACH_PTR(inlines_called, tmp) {
 718                 split_function(tmp);
 719         } END_FOR_EACH_PTR(tmp);
 720         free_ptr_list(&inlines_called);
 721 }
 722
 723 static void split_functions(struct symbol_list *sym_list)
 724 {
 725         struct symbol *sym;
 726
 727         FOR_EACH_PTR(sym_list, sym) {
 728                 if (sym->type == SYM_NODE && get_base_type(sym)->type == SYM_FN) {
 729                         split_function(sym);
 730                         process_inlines();
 731                 } else {
 732                         __pass_to_client(sym, BASE_HOOK);
 733                 }
 734         } END_FOR_EACH_PTR(sym);
 735         __pass_to_client_no_data(END_FILE_HOOK);
 736 }
 737
 738 void smatch (int argc, char **argv)
 739 {
 740
 741         struct string_list *filelist = NULL;
 742         struct symbol_list *sym_list;
 743         char *file;
 744
 745         if (argc < 2) {
 746                 printf("Usage:  smatch [--debug] <filename.c>\n");
 747                 exit(1);
 748         }
 749         sparse_initialize(argc, argv, &filelist);
 750         FOR_EACH_PTR_NOTAG(filelist, file) {
 751                 sym_list = sparse_keep_tokens(file);
 752                 split_functions(sym_list);
 753         } END_FOR_EACH_PTR_NOTAG(file);
 754 }