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