smatch_flow.c

   1 /*
   2  * Copyright (C) 2006,2008 Dan Carpenter.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #define _GNU_SOURCE 1
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include "token.h"
  22 #include "scope.h"
  23 #include "smatch.h"
  24 #include "smatch_expression_stacks.h"
  25 #include "smatch_extra.h"
  26 #include "smatch_slist.h"
  27
  28 int __in_fake_assign;
  29 int final_pass;
  30 int __inline_call;
  31 struct expression  *__inline_fn;
  32
  33 static int __smatch_lineno = 0;
  34
  35 static char *base_file;
  36 static const char *filename;
  37 static char *pathname;
  38 static char *full_filename;
  39 static char *cur_func;
  40 static unsigned int loop_count;
  41 static int last_goto_statement_handled;
  42 int __expr_stmt_count;
  43 int __in_function_def;
  44 static struct expression_list *switch_expr_stack = NULL;
  45 static struct expression_list *post_op_stack = NULL;
  46
  47 struct expression_list *big_expression_stack;
  48 struct statement_list *big_statement_stack;
  49 int __in_pre_condition = 0;
  50 int __bail_on_rest_of_function = 0;
  51 static struct timeval fn_start_time;
  52 char *get_function(void) { return cur_func; }
  53 int get_lineno(void) { return __smatch_lineno; }
  54 int inside_loop(void) { return !!loop_count; }
  55 int definitely_inside_loop(void) { return !!(loop_count & ~0x80000000); }
  56 struct expression *get_switch_expr(void) { return top_expression(switch_expr_stack); }
  57 int in_expression_statement(void) { return !!__expr_stmt_count; }
  58
  59 static void split_symlist(struct symbol_list *sym_list);
  60 static void split_declaration(struct symbol_list *sym_list);
  61 static void split_expr_list(struct expression_list *expr_list);
  62 static void add_inline_function(struct symbol *sym);
  63 static void parse_inline(struct expression *expr);
  64
  65 int option_assume_loops = 0;
  66 int option_known_conditions = 0;
  67 int option_two_passes = 0;
  68 struct symbol *cur_func_sym = NULL;
  69 struct stree *global_states;
  70
  71 long long valid_ptr_min = 4096;
  72 long long valid_ptr_max = 2117777777;
  73 sval_t valid_ptr_min_sval = {
  74         .type = &ptr_ctype,
  75         {.value = 4096},
  76 };
  77 sval_t valid_ptr_max_sval = {
  78         .type = &ptr_ctype,
  79         {.value = LONG_MAX - 100000},
  80 };
  81
  82 static void set_valid_ptr_max(void)
  83 {
  84         if (type_bits(&ptr_ctype) == 32)
  85                 valid_ptr_max = 2117777777;
  86         else if (type_bits(&ptr_ctype) == 64)
  87                 valid_ptr_max = 2117777777777777777LL;
  88
  89         valid_ptr_max_sval.value = valid_ptr_max;
  90 }
  91
  92 int outside_of_function(void)
  93 {
  94         return cur_func_sym == NULL;
  95 }
  96
  97 const char *get_filename(void)
  98 {
  99         if (option_info)
 100                 return base_file;
 101         if (option_full_path)
 102                 return full_filename;
 103         return filename;
 104 }
 105
 106 const char *get_base_file(void)
 107 {
 108         return base_file;
 109 }
 110
 111 static void set_position(struct position pos)
 112 {
 113         int len;
 114         static int prev_stream = -1;
 115
 116         if (pos.stream == 0 && pos.line == 0)
 117                 return;
 118
 119         __smatch_lineno = pos.line;
 120
 121         if (pos.stream == prev_stream)
 122                 return;
 123
 124         filename = stream_name(pos.stream);
 125
 126         free(full_filename);
 127         pathname = getcwd(NULL, 0);
 128         if (pathname) {
 129                 len = strlen(pathname) + 1 + strlen(filename) + 1;
 130                 full_filename = malloc(len);
 131                 snprintf(full_filename, len, "%s/%s", pathname, filename);
 132         } else {
 133                 full_filename = alloc_string(filename);
 134         }
 135         free(pathname);
 136 }
 137
 138 int is_assigned_call(struct expression *expr)
 139 {
 140         struct expression *tmp;
 141
 142         FOR_EACH_PTR_REVERSE(big_expression_stack, tmp) {
 143                 if (tmp->type == EXPR_ASSIGNMENT && tmp->op == '=' &&
 144                     strip_expr(tmp->right) == expr)
 145                         return 1;
 146                 if (tmp->pos.line < expr->pos.line)
 147                         return 0;
 148         } END_FOR_EACH_PTR_REVERSE(tmp);
 149         return 0;
 150 }
 151
 152 static int is_inline_func(struct expression *expr)
 153 {
 154         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 155                 return 0;
 156         if (expr->symbol->ctype.modifiers & MOD_INLINE)
 157                 return 1;
 158         return 0;
 159 }
 160
 161 static int is_noreturn_func(struct expression *expr)
 162 {
 163         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 164                 return 0;
 165         if (expr->symbol->ctype.modifiers & MOD_NORETURN)
 166                 return 1;
 167         return 0;
 168 }
 169
 170 int inlinable(struct expression *expr)
 171 {
 172         struct symbol *sym;
 173         struct statement *last_stmt = NULL;
 174
 175         if (__inline_fn)  /* don't nest */
 176                 return 0;
 177
 178         if (expr->type != EXPR_SYMBOL || !expr->symbol)
 179                 return 0;
 180         if (is_no_inline_function(expr->symbol->ident->name))
 181                 return 0;
 182         sym = get_base_type(expr->symbol);
 183         if (sym->stmt && sym->stmt->type == STMT_COMPOUND) {
 184                 if (ptr_list_size((struct ptr_list *)sym->stmt->stmts) > 10)
 185                         return 0;
 186                 if (sym->stmt->type != STMT_COMPOUND)
 187                         return 0;
 188                 last_stmt = last_ptr_list((struct ptr_list *)sym->stmt->stmts);
 189         }
 190         if (sym->inline_stmt && sym->inline_stmt->type == STMT_COMPOUND) {
 191                 if (ptr_list_size((struct ptr_list *)sym->inline_stmt->stmts) > 10)
 192                         return 0;
 193                 if (sym->inline_stmt->type != STMT_COMPOUND)
 194                         return 0;
 195                 last_stmt = last_ptr_list((struct ptr_list *)sym->inline_stmt->stmts);
 196         }
 197
 198         if (!last_stmt)
 199                 return 0;
 200
 201         /* the magic numbers in this function are pulled out of my bum. */
 202         if (last_stmt->pos.line > sym->pos.line + 20)
 203                 return 0;
 204
 205         return 1;
 206 }
 207
 208 void __process_post_op_stack(void)
 209 {
 210         struct expression *expr;
 211
 212         FOR_EACH_PTR(post_op_stack, expr) {
 213                 __pass_to_client(expr, OP_HOOK);
 214         } END_FOR_EACH_PTR(expr);
 215
 216         __free_ptr_list((struct ptr_list **)&post_op_stack);
 217 }
 218
 219 static int handle_comma_assigns(struct expression *expr)
 220 {
 221         struct expression *right;
 222         struct expression *assign;
 223
 224         right = strip_expr(expr->right);
 225         if (right->type != EXPR_COMMA)
 226                 return 0;
 227
 228         __split_expr(right->left);
 229         __process_post_op_stack();
 230
 231         assign = assign_expression(expr->left, right->right);
 232         __split_expr(assign);
 233
 234         return 1;
 235 }
 236
 237 void __split_expr(struct expression *expr)
 238 {
 239         if (!expr)
 240                 return;
 241
 242         // sm_msg(" Debug expr_type %d %s", expr->type, show_special(expr->op));
 243
 244         if (__in_fake_assign && expr->type != EXPR_ASSIGNMENT)
 245                 return;
 246         if (__in_fake_assign >= 4)  /* don't allow too much nesting */
 247                 return;
 248
 249         push_expression(&big_expression_stack, expr);
 250         set_position(expr->pos);
 251         __pass_to_client(expr, EXPR_HOOK);
 252
 253         switch (expr->type) {
 254         case EXPR_PREOP:
 255                 if (expr->op == '*')
 256                         __pass_to_client(expr, DEREF_HOOK);
 257                 __split_expr(expr->unop);
 258                 __pass_to_client(expr, OP_HOOK);
 259                 break;
 260         case EXPR_POSTOP:
 261                 __split_expr(expr->unop);
 262                 push_expression(&post_op_stack, expr);
 263                 break;
 264         case EXPR_STATEMENT:
 265                 __expr_stmt_count++;
 266                 __split_stmt(expr->statement);
 267                 __expr_stmt_count--;
 268                 break;
 269         case EXPR_LOGICAL:
 270         case EXPR_COMPARE:
 271                 __pass_to_client(expr, LOGIC_HOOK);
 272                 __handle_logic(expr);
 273                 break;
 274         case EXPR_BINOP:
 275                 __pass_to_client(expr, BINOP_HOOK);
 276         case EXPR_COMMA:
 277                 __split_expr(expr->left);
 278                 __process_post_op_stack();
 279                 __split_expr(expr->right);
 280                 break;
 281         case EXPR_ASSIGNMENT: {
 282                 struct expression *tmp;
 283
 284                 if (!expr->right)
 285                         break;
 286
 287                 __pass_to_client(expr, RAW_ASSIGNMENT_HOOK);
 288
 289                 /* foo = !bar() */
 290                 if (__handle_condition_assigns(expr))
 291                         break;
 292                 /* foo = (x < 5 ? foo : 5); */
 293                 if (__handle_select_assigns(expr))
 294                         break;
 295                 /* foo = ({frob(); frob(); frob(); 1;}) */
 296                 if (__handle_expr_statement_assigns(expr))
 297                         break;
 298                 /* foo = (3, 4); */
 299                 if (handle_comma_assigns(expr))
 300                         break;
 301
 302                 __split_expr(expr->right);
 303                 if (outside_of_function())
 304                         __pass_to_client(expr, GLOBAL_ASSIGNMENT_HOOK);
 305                 else
 306                         __pass_to_client(expr, ASSIGNMENT_HOOK);
 307
 308                 __fake_struct_member_assignments(expr);
 309
 310                 tmp = strip_expr(expr->right);
 311                 if (expr->op == '=' && tmp->type == EXPR_CALL) {
 312                         __pass_to_client(expr, CALL_ASSIGNMENT_HOOK);
 313                         if (!is_fake_call(tmp))
 314                                 __pass_to_client(tmp, FUNCTION_CALL_HOOK_AFTER);
 315                 }
 316                 if (get_macro_name(tmp->pos) &&
 317                     get_macro_name(expr->pos) != get_macro_name(tmp->pos))
 318                         __pass_to_client(expr, MACRO_ASSIGNMENT_HOOK);
 319                 __split_expr(expr->left);
 320                 break;
 321         }
 322         case EXPR_DEREF:
 323                 __pass_to_client(expr, DEREF_HOOK);
 324                 __split_expr(expr->deref);
 325                 break;
 326         case EXPR_SLICE:
 327                 __split_expr(expr->base);
 328                 break;
 329         case EXPR_CAST:
 330         case EXPR_FORCE_CAST:
 331                 __pass_to_client(expr, CAST_HOOK);
 332                 __split_expr(expr->cast_expression);
 333                 break;
 334         case EXPR_SIZEOF:
 335                 if (expr->cast_expression)
 336                         __pass_to_client(strip_parens(expr->cast_expression),
 337                                          SIZEOF_HOOK);
 338                 break;
 339         case EXPR_OFFSETOF:
 340         case EXPR_ALIGNOF:
 341                 evaluate_expression(expr);
 342                 break;
 343         case EXPR_CONDITIONAL:
 344         case EXPR_SELECT:
 345                 if (known_condition_true(expr->conditional)) {
 346                         __split_expr(expr->cond_true);
 347                         break;
 348                 }
 349                 if (known_condition_false(expr->conditional)) {
 350                         __split_expr(expr->cond_false);
 351                         break;
 352                 }
 353                 __pass_to_client(expr, SELECT_HOOK);
 354                 __split_whole_condition(expr->conditional);
 355                 __split_expr(expr->cond_true);
 356                 __push_true_states();
 357                 __use_false_states();
 358                 __split_expr(expr->cond_false);
 359                 __merge_true_states();
 360                 break;
 361         case EXPR_CALL:
 362                 if (sym_name_is("__builtin_constant_p", expr->fn))
 363                         break;
 364                 split_expr_list(expr->args);
 365                 __split_expr(expr->fn);
 366                 if (is_inline_func(expr->fn))
 367                         add_inline_function(expr->fn->symbol);
 368                 if (inlinable(expr->fn))
 369                         __inline_call = 1;
 370                 __process_post_op_stack();
 371                 __pass_to_client(expr, FUNCTION_CALL_HOOK);
 372                 __inline_call = 0;
 373                 if (inlinable(expr->fn)) {
 374                         parse_inline(expr);
 375                 }
 376                 __pass_to_client(expr, CALL_HOOK_AFTER_INLINE);
 377                 if (!is_assigned_call(expr))
 378                         __pass_to_client(expr, FUNCTION_CALL_HOOK_AFTER);
 379                 if (is_noreturn_func(expr->fn))
 380                         nullify_path();
 381                 break;
 382         case EXPR_INITIALIZER:
 383                 split_expr_list(expr->expr_list);
 384                 break;
 385         case EXPR_IDENTIFIER:
 386                 __split_expr(expr->ident_expression);
 387                 break;
 388         case EXPR_INDEX:
 389                 __split_expr(expr->idx_expression);
 390                 break;
 391         case EXPR_POS:
 392                 __split_expr(expr->init_expr);
 393                 break;
 394         case EXPR_SYMBOL:
 395                 __pass_to_client(expr, SYM_HOOK);
 396                 break;
 397         case EXPR_STRING:
 398                 __pass_to_client(expr, STRING_HOOK);
 399                 break;
 400         default:
 401                 break;
 402         };
 403         pop_expression(&big_expression_stack);
 404 }
 405
 406 static int is_forever_loop(struct statement *stmt)
 407 {
 408         struct expression *expr;
 409
 410         expr = strip_expr(stmt->iterator_pre_condition);
 411         if (!expr)
 412                 expr = stmt->iterator_post_condition;
 413         if (!expr) {
 414                 /* this is a for(;;) loop... */
 415                 return 1;
 416         }
 417
 418         if (expr->type == EXPR_VALUE && expr->value == 1)
 419                 return 1;
 420
 421         return 0;
 422 }
 423
 424 static int loop_num;
 425 static char *get_loop_name(int num)
 426 {
 427         char buf[256];
 428
 429         snprintf(buf, 255, "-loop%d", num);
 430         buf[255] = '\0';
 431         return alloc_sname(buf);
 432 }
 433
 434 /*
 435  * Pre Loops are while and for loops.
 436  */
 437 static void handle_pre_loop(struct statement *stmt)
 438 {
 439         int once_through; /* we go through the loop at least once */
 440         struct sm_state *extra_sm = NULL;
 441         int unchanged = 0;
 442         char *loop_name;
 443         struct stree *stree = NULL;
 444         struct sm_state *sm = NULL;
 445
 446         loop_name = get_loop_name(loop_num);
 447         loop_num++;
 448
 449         __split_stmt(stmt->iterator_pre_statement);
 450
 451         once_through = implied_condition_true(stmt->iterator_pre_condition);
 452
 453         loop_count++;
 454         __push_continues();
 455         __push_breaks();
 456
 457         __merge_gotos(loop_name);
 458
 459         extra_sm = __extra_handle_canonical_loops(stmt, &stree);
 460         __in_pre_condition++;
 461         __pass_to_client(stmt, PRELOOP_HOOK);
 462         __split_whole_condition(stmt->iterator_pre_condition);
 463         __in_pre_condition--;
 464         FOR_EACH_SM(stree, sm) {
 465                 set_state(sm->owner, sm->name, sm->sym, sm->state);
 466         } END_FOR_EACH_SM(sm);
 467         free_stree(&stree);
 468         if (extra_sm)
 469                 extra_sm = get_sm_state(extra_sm->owner, extra_sm->name, extra_sm->sym);
 470
 471         if (option_assume_loops)
 472                 once_through = 1;
 473
 474         __split_stmt(stmt->iterator_statement);
 475         __warn_on_silly_pre_loops();
 476         if (is_forever_loop(stmt)) {
 477                 __merge_continues();
 478                 __save_gotos(loop_name);
 479
 480                 __push_fake_cur_stree();
 481                 __split_stmt(stmt->iterator_post_statement);
 482                 stree = __pop_fake_cur_stree();
 483
 484                 __discard_false_states();
 485                 __use_breaks();
 486
 487                 if (!__path_is_null())
 488                         __merge_stree_into_cur(stree);
 489                 free_stree(&stree);
 490         } else {
 491                 __merge_continues();
 492                 unchanged = __iterator_unchanged(extra_sm);
 493                 __split_stmt(stmt->iterator_post_statement);
 494                 __save_gotos(loop_name);
 495                 __in_pre_condition++;
 496                 __split_whole_condition(stmt->iterator_pre_condition);
 497                 __in_pre_condition--;
 498                 nullify_path();
 499                 __merge_false_states();
 500                 if (once_through)
 501                         __discard_false_states();
 502                 else
 503                         __merge_false_states();
 504
 505                 if (extra_sm && unchanged)
 506                         __extra_pre_loop_hook_after(extra_sm,
 507                                                 stmt->iterator_post_statement,
 508                                                 stmt->iterator_pre_condition);
 509                 __merge_breaks();
 510         }
 511         loop_count--;
 512 }
 513
 514 /*
 515  * Post loops are do {} while();
 516  */
 517 static void handle_post_loop(struct statement *stmt)
 518 {
 519         char *loop_name;
 520
 521         loop_name = get_loop_name(loop_num);
 522         loop_num++;
 523         loop_count++;
 524
 525         __push_continues();
 526         __push_breaks();
 527         __merge_gotos(loop_name);
 528         __split_stmt(stmt->iterator_statement);
 529         __merge_continues();
 530         if (!is_zero(stmt->iterator_post_condition))
 531                 __save_gotos(loop_name);
 532
 533         if (is_forever_loop(stmt)) {
 534                 __use_breaks();
 535         } else {
 536                 __split_whole_condition(stmt->iterator_post_condition);
 537                 __use_false_states();
 538                 __merge_breaks();
 539         }
 540         loop_count--;
 541 }
 542
 543 static int empty_statement(struct statement *stmt)
 544 {
 545         if (!stmt)
 546                 return 0;
 547         if (stmt->type == STMT_EXPRESSION && !stmt->expression)
 548                 return 1;
 549         return 0;
 550 }
 551
 552 static int last_stmt_on_same_line(void)
 553 {
 554         struct statement *stmt;
 555         int i = 0;
 556
 557         FOR_EACH_PTR_REVERSE(big_statement_stack, stmt) {
 558                 if (!i++)
 559                         continue;
 560                 if  (stmt->pos.line == get_lineno())
 561                         return 1;
 562                 return 0;
 563         } END_FOR_EACH_PTR_REVERSE(stmt);
 564         return 0;
 565 }
 566
 567 static void split_asm_constraints(struct expression_list *expr_list)
 568 {
 569         struct expression *expr;
 570         int state = 0;
 571
 572         FOR_EACH_PTR(expr_list, expr) {
 573                 switch (state) {
 574                 case 0: /* identifier */
 575                 case 1: /* constraint */
 576                         state++;
 577                         continue;
 578                 case 2: /* expression */
 579                         state = 0;
 580                         __split_expr(expr);
 581                         continue;
 582                 }
 583         } END_FOR_EACH_PTR(expr);
 584 }
 585
 586 static int is_case_val(struct statement *stmt, sval_t sval)
 587 {
 588         sval_t case_sval;
 589
 590         if (stmt->type != STMT_CASE)
 591                 return 0;
 592         if (!stmt->case_expression) {
 593                 __set_default();
 594                 return 1;
 595         }
 596         if (!get_value(stmt->case_expression, &case_sval))
 597                 return 0;
 598         if (case_sval.value == sval.value)
 599                 return 1;
 600         return 0;
 601 }
 602
 603 static void split_known_switch(struct statement *stmt, sval_t sval)
 604 {
 605         struct statement *tmp;
 606
 607         __split_expr(stmt->switch_expression);
 608
 609         push_expression(&switch_expr_stack, stmt->switch_expression);
 610         __save_switch_states(top_expression(switch_expr_stack));
 611         nullify_path();
 612         __push_default();
 613         __push_breaks();
 614
 615         stmt = stmt->switch_statement;
 616
 617         __push_scope_hooks();
 618         FOR_EACH_PTR(stmt->stmts, tmp) {
 619                 __smatch_lineno = tmp->pos.line;
 620                 if (is_case_val(tmp, sval)) {
 621                         __merge_switches(top_expression(switch_expr_stack),
 622                                          stmt->case_expression);
 623                         __pass_case_to_client(top_expression(switch_expr_stack),
 624                                               stmt->case_expression);
 625                 }
 626                 if (__path_is_null())
 627                         continue;
 628                 __split_stmt(tmp);
 629                 if (__path_is_null()) {
 630                         __set_default();
 631                         goto out;
 632                 }
 633         } END_FOR_EACH_PTR(tmp);
 634 out:
 635         __call_scope_hooks();
 636         if (!__pop_default())
 637                 __merge_switches(top_expression(switch_expr_stack),
 638                                  NULL);
 639         __discard_switches();
 640         __merge_breaks();
 641         pop_expression(&switch_expr_stack);
 642 }
 643
 644 static int taking_too_long(void)
 645 {
 646         int ms;
 647
 648         ms = ms_since(&fn_start_time);
 649         if (ms > 1000 * 60 * 5)  /* five minutes */
 650                 return 1;
 651         return 0;
 652 }
 653
 654 static int is_last_stmt(struct statement *cur_stmt)
 655 {
 656         struct symbol *fn = get_base_type(cur_func_sym);
 657         struct statement *stmt;
 658
 659         if (!fn)
 660                 return 0;
 661         stmt = fn->stmt;
 662         if (!stmt)
 663                 stmt = fn->inline_stmt;
 664         if (!stmt || stmt->type != STMT_COMPOUND)
 665                 return 0;
 666         stmt = last_ptr_list((struct ptr_list *)stmt->stmts);
 667         if (stmt && stmt->type == STMT_LABEL)
 668                 stmt = stmt->label_statement;
 669         if (stmt == cur_stmt)
 670                 return 1;
 671         return 0;
 672 }
 673
 674 static void handle_backward_goto(struct statement *goto_stmt)
 675 {
 676         const char *goto_name, *label_name;
 677         struct statement *func_stmt;
 678         struct symbol *base_type = get_base_type(cur_func_sym);
 679         struct statement *tmp;
 680         int found = 0;
 681
 682         if (!option_info)
 683                 return;
 684         if (last_goto_statement_handled)
 685                 return;
 686         last_goto_statement_handled = 1;
 687
 688         if (!goto_stmt->goto_label ||
 689             goto_stmt->goto_label->type != SYM_LABEL ||
 690             !goto_stmt->goto_label->ident)
 691                 return;
 692         goto_name = goto_stmt->goto_label->ident->name;
 693
 694         func_stmt = base_type->stmt;
 695         if (!func_stmt)
 696                 func_stmt = base_type->inline_stmt;
 697         if (!func_stmt)
 698                 return;
 699         if (func_stmt->type != STMT_COMPOUND)
 700                 return;
 701
 702         FOR_EACH_PTR(func_stmt->stmts, tmp) {
 703                 if (!found) {
 704                         if (tmp->type != STMT_LABEL)
 705                                 continue;
 706                         if (!tmp->label_identifier ||
 707                             tmp->label_identifier->type != SYM_LABEL ||
 708                             !tmp->label_identifier->ident)
 709                                 continue;
 710                         label_name = tmp->label_identifier->ident->name;
 711                         if (strcmp(goto_name, label_name) != 0)
 712                                 continue;
 713                         found = 1;
 714                 }
 715                 __split_stmt(tmp);
 716         } END_FOR_EACH_PTR(tmp);
 717 }
 718
 719 static void fake_a_return(void)
 720 {
 721         struct symbol *return_type;
 722
 723         nullify_path();
 724         __unnullify_path();
 725
 726         return_type = get_real_base_type(cur_func_sym);
 727         return_type = get_real_base_type(return_type);
 728         if (return_type != &void_ctype) {
 729                 __pass_to_client(unknown_value_expression(NULL), RETURN_HOOK);
 730                 nullify_path();
 731         }
 732
 733         __pass_to_client(cur_func_sym, END_FUNC_HOOK);
 734         __pass_to_client(cur_func_sym, AFTER_FUNC_HOOK);
 735 }
 736
 737 void __split_stmt(struct statement *stmt)
 738 {
 739         sval_t sval;
 740
 741         if (!stmt)
 742                 goto out;
 743
 744         if (__bail_on_rest_of_function || out_of_memory() || taking_too_long()) {
 745                 static char *printed = NULL;
 746
 747                 __bail_on_rest_of_function = 1;
 748                 if (printed != cur_func)
 749                         sm_msg("Function too hairy.  Giving up.");
 750                 fake_a_return();
 751                 final_pass = 0;  /* turn off sm_msg() from here */
 752                 printed = cur_func;
 753                 return;
 754         }
 755
 756         add_ptr_list(&big_statement_stack, stmt);
 757         free_expression_stack(&big_expression_stack);
 758         set_position(stmt->pos);
 759         __pass_to_client(stmt, STMT_HOOK);
 760
 761         switch (stmt->type) {
 762         case STMT_DECLARATION:
 763                 split_declaration(stmt->declaration);
 764                 break;
 765         case STMT_RETURN:
 766                 __split_expr(stmt->ret_value);
 767                 __pass_to_client(stmt->ret_value, RETURN_HOOK);
 768                 __process_post_op_stack();
 769                 nullify_path();
 770                 break;
 771         case STMT_EXPRESSION:
 772                 __split_expr(stmt->expression);
 773                 break;
 774         case STMT_COMPOUND: {
 775                 struct statement *tmp;
 776
 777                 __push_scope_hooks();
 778                 FOR_EACH_PTR(stmt->stmts, tmp) {
 779                         __split_stmt(tmp);
 780                 } END_FOR_EACH_PTR(tmp);
 781                 __call_scope_hooks();
 782                 break;
 783         }
 784         case STMT_IF:
 785                 if (known_condition_true(stmt->if_conditional)) {
 786                         __split_stmt(stmt->if_true);
 787                         break;
 788                 }
 789                 if (known_condition_false(stmt->if_conditional)) {
 790                         __split_stmt(stmt->if_false);
 791                         break;
 792                 }
 793                 if (option_known_conditions &&
 794                     implied_condition_true(stmt->if_conditional)) {
 795                         sm_info("this condition is true.");
 796                         __split_stmt(stmt->if_true);
 797                         break;
 798                 }
 799                 if (option_known_conditions &&
 800                     implied_condition_false(stmt->if_conditional)) {
 801                         sm_info("this condition is false.");
 802                         __split_stmt(stmt->if_false);
 803                         break;
 804                 }
 805                 __split_whole_condition(stmt->if_conditional);
 806                 __split_stmt(stmt->if_true);
 807                 if (empty_statement(stmt->if_true) &&
 808                         last_stmt_on_same_line() &&
 809                         !get_macro_name(stmt->if_true->pos))
 810                         sm_msg("warn: if();");
 811                 __push_true_states();
 812                 __use_false_states();
 813                 __split_stmt(stmt->if_false);
 814                 __merge_true_states();
 815                 break;
 816         case STMT_ITERATOR:
 817                 if (stmt->iterator_pre_condition)
 818                         handle_pre_loop(stmt);
 819                 else if (stmt->iterator_post_condition)
 820                         handle_post_loop(stmt);
 821                 else {
 822                         // these are for(;;) type loops.
 823                         handle_pre_loop(stmt);
 824                 }
 825                 break;
 826         case STMT_SWITCH:
 827                 if (get_value(stmt->switch_expression, &sval)) {
 828                         split_known_switch(stmt, sval);
 829                         break;
 830                 }
 831                 __split_expr(stmt->switch_expression);
 832                 push_expression(&switch_expr_stack, stmt->switch_expression);
 833                 __save_switch_states(top_expression(switch_expr_stack));
 834                 nullify_path();
 835                 __push_default();
 836                 __push_breaks();
 837                 __split_stmt(stmt->switch_statement);
 838                 if (!__pop_default())
 839                         __merge_switches(top_expression(switch_expr_stack),
 840                                       NULL);
 841                 __discard_switches();
 842                 __merge_breaks();
 843                 pop_expression(&switch_expr_stack);
 844                 break;
 845         case STMT_CASE:
 846                 __merge_switches(top_expression(switch_expr_stack),
 847                                       stmt->case_expression);
 848                 __pass_case_to_client(top_expression(switch_expr_stack),
 849                                       stmt->case_expression);
 850                 if (!stmt->case_expression)
 851                         __set_default();
 852                 __split_expr(stmt->case_expression);
 853                 __split_expr(stmt->case_to);
 854                 __split_stmt(stmt->case_statement);
 855                 break;
 856         case STMT_LABEL:
 857                 if (stmt->label_identifier &&
 858                     stmt->label_identifier->type == SYM_LABEL &&
 859                     stmt->label_identifier->ident) {
 860                         loop_count |= 0x80000000;
 861                         __merge_gotos(stmt->label_identifier->ident->name);
 862                 }
 863                 __split_stmt(stmt->label_statement);
 864                 break;
 865         case STMT_GOTO:
 866                 __split_expr(stmt->goto_expression);
 867                 if (stmt->goto_label && stmt->goto_label->type == SYM_NODE) {
 868                         if (!strcmp(stmt->goto_label->ident->name, "break")) {
 869                                 __process_breaks();
 870                         } else if (!strcmp(stmt->goto_label->ident->name,
 871                                            "continue")) {
 872                                 __process_continues();
 873                         }
 874                 } else if (stmt->goto_label &&
 875                            stmt->goto_label->type == SYM_LABEL &&
 876                            stmt->goto_label->ident) {
 877                         __save_gotos(stmt->goto_label->ident->name);
 878                 }
 879                 nullify_path();
 880                 if (is_last_stmt(stmt))
 881                         handle_backward_goto(stmt);
 882                 break;
 883         case STMT_NONE:
 884                 break;
 885         case STMT_ASM:
 886                 __pass_to_client(stmt, ASM_HOOK);
 887                 __split_expr(stmt->asm_string);
 888                 split_asm_constraints(stmt->asm_outputs);
 889                 split_asm_constraints(stmt->asm_inputs);
 890                 split_asm_constraints(stmt->asm_clobbers);
 891                 break;
 892         case STMT_CONTEXT:
 893                 break;
 894         case STMT_RANGE:
 895                 __split_expr(stmt->range_expression);
 896                 __split_expr(stmt->range_low);
 897                 __split_expr(stmt->range_high);
 898                 break;
 899         }
 900         __pass_to_client(stmt, STMT_HOOK_AFTER);
 901 out:
 902         __process_post_op_stack();
 903 }
 904
 905 static void split_expr_list(struct expression_list *expr_list)
 906 {
 907         struct expression *expr;
 908
 909         FOR_EACH_PTR(expr_list, expr) {
 910                 __split_expr(expr);
 911                 __process_post_op_stack();
 912         } END_FOR_EACH_PTR(expr);
 913 }
 914
 915 static void split_sym(struct symbol *sym)
 916 {
 917         if (!sym)
 918                 return;
 919         if (!(sym->namespace & NS_SYMBOL))
 920                 return;
 921
 922         __split_stmt(sym->stmt);
 923         __split_expr(sym->array_size);
 924         split_symlist(sym->arguments);
 925         split_symlist(sym->symbol_list);
 926         __split_stmt(sym->inline_stmt);
 927         split_symlist(sym->inline_symbol_list);
 928 }
 929
 930 static void split_symlist(struct symbol_list *sym_list)
 931 {
 932         struct symbol *sym;
 933
 934         FOR_EACH_PTR(sym_list, sym) {
 935                 split_sym(sym);
 936         } END_FOR_EACH_PTR(sym);
 937 }
 938
 939 typedef void (fake_cb)(struct expression *expr);
 940
 941 static int member_to_number(struct expression *expr, struct ident *member)
 942 {
 943         struct symbol *type, *tmp;
 944         char *name;
 945         int i;
 946
 947         if (!member)
 948                 return -1;
 949         name = member->name;
 950
 951         type = get_type(expr);
 952         if (!type || type->type != SYM_STRUCT)
 953                 return -1;
 954
 955         i = -1;
 956         FOR_EACH_PTR(type->symbol_list, tmp) {
 957                 i++;
 958                 if (!tmp->ident)
 959                         continue;
 960                 if (strcmp(name, tmp->ident->name) == 0)
 961                         return i;
 962         } END_FOR_EACH_PTR(tmp);
 963         return -1;
 964 }
 965
 966 static struct ident *number_to_member(struct expression *expr, int num)
 967 {
 968         struct symbol *type, *member;
 969         int i = 0;
 970
 971         type = get_type(expr);
 972         if (!type || type->type != SYM_STRUCT)
 973                 return NULL;
 974
 975         FOR_EACH_PTR(type->symbol_list, member) {
 976                 if (i == num)
 977                         return member->ident;
 978                 i++;
 979         } END_FOR_EACH_PTR(member);
 980         return NULL;
 981 }
 982
 983 static void fake_element_assigns_helper(struct expression *array, struct expression_list *expr_list, fake_cb *fake_cb);
 984
 985 struct member_set {
 986         struct ident *ident;
 987         int set;
 988 };
 989
 990 static struct member_set *alloc_member_set(struct symbol *type)
 991 {
 992         struct member_set *member_set;
 993         struct symbol *member;
 994         int member_count;
 995         int member_idx;
 996
 997         member_count = ptr_list_size((struct ptr_list *)type->symbol_list);
 998         member_set = malloc(member_count * sizeof(*member_set));
 999         member_idx = 0;
1000         FOR_EACH_PTR(type->symbol_list, member) {
1001                 member_set[member_idx].ident = member->ident;
1002                 member_set[member_idx].set = 0;
1003                 member_idx++;
1004         } END_FOR_EACH_PTR(member);
1005
1006         return member_set;
1007 }
1008
1009 static void mark_member_as_set(struct symbol *type, struct member_set *member_set, struct ident *ident)
1010 {
1011         int member_count = ptr_list_size((struct ptr_list *)type->symbol_list);
1012         int i;
1013
1014         for (i = 0; i < member_count; i++) {
1015                 if (member_set[i].ident == ident) {
1016                         member_set[i].set = 1;
1017                         return;
1018                 }
1019         }
1020 //      crap.  this is buggy.
1021 //      sm_msg("internal smatch error in initializer %s.%s", type->ident->name, ident->name);
1022 }
1023
1024 static void set_unset_to_zero(struct expression *symbol, struct symbol *type, struct member_set *member_set)
1025 {
1026         struct expression *deref, *assign;
1027         struct symbol *member, *member_type;
1028         int member_idx;
1029
1030         member_idx = 0;
1031         FOR_EACH_PTR(type->symbol_list, member) {
1032                 if (!member->ident || member_set[member_idx].set) {
1033                         member_idx++;
1034                         continue;
1035                 }
1036                 member_type = get_real_base_type(member);
1037                 if (!member_type || member_type->type == SYM_ARRAY) {
1038                         member_idx++;
1039                         continue;
1040                 }
1041                 /* TODO: this should be handled recursively and not ignored */
1042                 if (member_type->type == SYM_STRUCT || member_type->type == SYM_UNION) {
1043                         member_idx++;
1044                         continue;
1045                 }
1046                 deref = member_expression(symbol, '.', member->ident);
1047                 assign = assign_expression(deref, zero_expr());
1048                 __split_expr(assign);
1049                 member_idx++;
1050         } END_FOR_EACH_PTR(member);
1051
1052 }
1053
1054 static void fake_member_assigns_helper(struct expression *symbol, struct expression_list *members, fake_cb *fake_cb)
1055 {
1056         struct expression *deref, *assign, *tmp;
1057         struct symbol *struct_type, *type;
1058         struct ident *member;
1059         int member_idx;
1060         struct member_set *member_set;
1061
1062         struct_type = get_type(symbol);
1063         if (!struct_type ||
1064             (struct_type->type != SYM_STRUCT && struct_type->type != SYM_UNION))
1065                 return;
1066
1067         member_set = alloc_member_set(struct_type);
1068
1069         member_idx = 0;
1070         FOR_EACH_PTR(members, tmp) {
1071                 member = number_to_member(symbol, member_idx);
1072                 while (tmp->type == EXPR_IDENTIFIER) {
1073                         member = tmp->expr_ident;
1074                         member_idx = member_to_number(symbol, member);
1075                         tmp = tmp->ident_expression;
1076                 }
1077                 mark_member_as_set(struct_type, member_set, member);
1078                 member_idx++;
1079                 deref = member_expression(symbol, '.', member);
1080                 if (tmp->type == EXPR_INITIALIZER) {
1081                         type = get_type(deref);
1082                         if (type && type->type == SYM_ARRAY)
1083                                 fake_element_assigns_helper(deref, tmp->expr_list, fake_cb);
1084                         else
1085                                 fake_member_assigns_helper(deref, tmp->expr_list, fake_cb);
1086                 } else {
1087                         assign = assign_expression(deref, tmp);
1088                         fake_cb(assign);
1089                 }
1090         } END_FOR_EACH_PTR(tmp);
1091
1092         set_unset_to_zero(symbol, struct_type, member_set);
1093 }
1094
1095 static void fake_member_assigns(struct symbol *sym, fake_cb *fake_cb)
1096 {
1097         fake_member_assigns_helper(symbol_expression(sym),
1098                                    sym->initializer->expr_list, fake_cb);
1099 }
1100
1101 static void fake_element_assigns_helper(struct expression *array, struct expression_list *expr_list, fake_cb *fake_cb)
1102 {
1103         struct expression *offset, *binop, *assign, *tmp;
1104         struct symbol *type;
1105         int idx;
1106
1107         idx = 0;
1108         FOR_EACH_PTR(expr_list, tmp) {
1109                 if (tmp->type == EXPR_INDEX) {
1110                         if (tmp->idx_from != tmp->idx_to)
1111                                 return;
1112                         idx = tmp->idx_from;
1113                         if (!tmp->idx_expression)
1114                                 goto next;
1115                         tmp = tmp->idx_expression;
1116                 }
1117                 offset = value_expr(idx);
1118                 binop = array_element_expression(array, offset);
1119                 if (tmp->type == EXPR_INITIALIZER) {
1120                         type = get_type(binop);
1121                         if (type && type->type == SYM_ARRAY)
1122                                 fake_element_assigns_helper(binop, tmp->expr_list, fake_cb);
1123                         else
1124                                 fake_member_assigns_helper(binop, tmp->expr_list, fake_cb);
1125                 } else {
1126                         assign = assign_expression(binop, tmp);
1127                         fake_cb(assign);
1128                 }
1129 next:
1130                 idx++;
1131         } END_FOR_EACH_PTR(tmp);
1132 }
1133
1134 static void fake_element_assigns(struct symbol *sym, fake_cb *fake_cb)
1135 {
1136         fake_element_assigns_helper(symbol_expression(sym), sym->initializer->expr_list, fake_cb);
1137 }
1138
1139 static void fake_assign_expr(struct symbol *sym)
1140 {
1141         struct expression *assign, *symbol;
1142
1143         symbol = symbol_expression(sym);
1144         assign = assign_expression(symbol, sym->initializer);
1145         __split_expr(assign);
1146 }
1147
1148 static void call_split_expr(struct expression *expr)
1149 {
1150         __split_expr(expr);
1151 }
1152
1153 static void do_initializer_stuff(struct symbol *sym)
1154 {
1155         if (!sym->initializer)
1156                 return;
1157
1158         if (sym->initializer->type == EXPR_INITIALIZER) {
1159                 if (get_real_base_type(sym)->type == SYM_ARRAY)
1160                         fake_element_assigns(sym, call_split_expr);
1161                 else
1162                         fake_member_assigns(sym, call_split_expr);
1163         } else {
1164                 fake_assign_expr(sym);
1165         }
1166 }
1167
1168 static void split_declaration(struct symbol_list *sym_list)
1169 {
1170         struct symbol *sym;
1171
1172         FOR_EACH_PTR(sym_list, sym) {
1173                 __pass_to_client(sym, DECLARATION_HOOK);
1174                 do_initializer_stuff(sym);
1175                 split_sym(sym);
1176         } END_FOR_EACH_PTR(sym);
1177 }
1178
1179 static void call_global_assign_hooks(struct expression *assign)
1180 {
1181         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1182 }
1183
1184 static void fake_global_assign(struct symbol *sym)
1185 {
1186         struct expression *assign, *symbol;
1187
1188         if (get_real_base_type(sym)->type == SYM_ARRAY) {
1189                 if (sym->initializer && sym->initializer->type == EXPR_INITIALIZER) {
1190                         fake_element_assigns(sym, call_global_assign_hooks);
1191                 } else if (sym->initializer) {
1192                         symbol = symbol_expression(sym);
1193                         assign = assign_expression(symbol, sym->initializer);
1194                         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1195                 } else {
1196                         fake_element_assigns_helper(symbol_expression(sym), NULL, call_global_assign_hooks);
1197                 }
1198         } else if (get_real_base_type(sym)->type == SYM_STRUCT) {
1199                 if (sym->initializer && sym->initializer->type == EXPR_INITIALIZER) {
1200                         fake_member_assigns(sym, call_global_assign_hooks);
1201                 } else if (sym->initializer) {
1202                         symbol = symbol_expression(sym);
1203                         assign = assign_expression(symbol, sym->initializer);
1204                         __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1205                 } else {
1206                         fake_member_assigns_helper(symbol_expression(sym), NULL, call_global_assign_hooks);
1207                 }
1208         } else {
1209                 symbol = symbol_expression(sym);
1210                 if (sym->initializer)
1211                         assign = assign_expression(symbol, sym->initializer);
1212                 else
1213                         assign = assign_expression(symbol, zero_expr());
1214                 __pass_to_client(assign, GLOBAL_ASSIGNMENT_HOOK);
1215         }
1216 }
1217
1218 static void start_function_definition(struct symbol *sym)
1219 {
1220         __in_function_def = 1;
1221         __pass_to_client(sym, FUNC_DEF_HOOK);
1222         __in_function_def = 0;
1223         __pass_to_client(sym, AFTER_DEF_HOOK);
1224
1225 }
1226
1227 static void split_function(struct symbol *sym)
1228 {
1229         struct symbol *base_type = get_base_type(sym);
1230
1231         if (!base_type->stmt && !base_type->inline_stmt)
1232                 return;
1233
1234         gettimeofday(&fn_start_time, NULL);
1235         cur_func_sym = sym;
1236         if (sym->ident)
1237                 cur_func = sym->ident->name;
1238         __smatch_lineno = sym->pos.line;
1239         loop_count = 0;
1240         last_goto_statement_handled = 0;
1241         sm_debug("new function:  %s\n", cur_func);
1242         __stree_id = 0;
1243         if (option_two_passes) {
1244                 __unnullify_path();
1245                 loop_num = 0;
1246                 final_pass = 0;
1247                 start_function_definition(sym);
1248                 __split_stmt(base_type->stmt);
1249                 __split_stmt(base_type->inline_stmt);
1250                 nullify_path();
1251         }
1252         __unnullify_path();
1253         loop_num = 0;
1254         final_pass = 1;
1255         start_function_definition(sym);
1256         __split_stmt(base_type->stmt);
1257         __split_stmt(base_type->inline_stmt);
1258         __pass_to_client(sym, END_FUNC_HOOK);
1259         __pass_to_client(sym, AFTER_FUNC_HOOK);
1260
1261         clear_all_states();
1262         cur_func_sym = NULL;
1263         cur_func = NULL;
1264         free_data_info_allocs();
1265         free_expression_stack(&switch_expr_stack);
1266         __free_ptr_list((struct ptr_list **)&big_statement_stack);
1267         __bail_on_rest_of_function = 0;
1268 }
1269
1270 static void parse_inline(struct expression *call)
1271 {
1272         struct symbol *base_type;
1273         int loop_num_bak = loop_num;
1274         int final_pass_bak = final_pass;
1275         char *cur_func_bak = cur_func;
1276         struct statement_list *big_statement_stack_bak = big_statement_stack;
1277         struct expression_list *big_expression_stack_bak = big_expression_stack;
1278         struct expression_list *switch_expr_stack_bak = switch_expr_stack;
1279         struct symbol *cur_func_sym_bak = cur_func_sym;
1280
1281         __pass_to_client(call, INLINE_FN_START);
1282         final_pass = 0;  /* don't print anything */
1283         __inline_fn = call;
1284
1285         base_type = get_base_type(call->fn->symbol);
1286         cur_func_sym = call->fn->symbol;
1287         if (call->fn->symbol->ident)
1288                 cur_func = call->fn->symbol->ident->name;
1289         else
1290                 cur_func = NULL;
1291         set_position(call->fn->symbol->pos);
1292
1293         save_all_states();
1294         big_statement_stack = NULL;
1295         big_expression_stack = NULL;
1296         switch_expr_stack = NULL;
1297
1298         sm_debug("inline function:  %s\n", cur_func);
1299         __unnullify_path();
1300         loop_num = 0;
1301         start_function_definition(call->fn->symbol);
1302         __split_stmt(base_type->stmt);
1303         __split_stmt(base_type->inline_stmt);
1304         __pass_to_client(call->fn->symbol, END_FUNC_HOOK);
1305         __pass_to_client(call->fn->symbol, AFTER_FUNC_HOOK);
1306
1307         free_expression_stack(&switch_expr_stack);
1308         __free_ptr_list((struct ptr_list **)&big_statement_stack);
1309         nullify_path();
1310         free_goto_stack();
1311
1312         loop_num = loop_num_bak;
1313         final_pass = final_pass_bak;
1314         cur_func_sym = cur_func_sym_bak;
1315         cur_func = cur_func_bak;
1316         big_statement_stack = big_statement_stack_bak;
1317         big_expression_stack = big_expression_stack_bak;
1318         switch_expr_stack = switch_expr_stack_bak;
1319
1320         restore_all_states();
1321         set_position(call->pos);
1322         __inline_fn = NULL;
1323         __pass_to_client(call, INLINE_FN_END);
1324 }
1325
1326 static struct symbol_list *inlines_called;
1327 static void add_inline_function(struct symbol *sym)
1328 {
1329         static struct symbol_list *already_added;
1330         struct symbol *tmp;
1331
1332         FOR_EACH_PTR(already_added, tmp) {
1333                 if (tmp == sym)
1334                         return;
1335         } END_FOR_EACH_PTR(tmp);
1336
1337         add_ptr_list(&already_added, sym);
1338         add_ptr_list(&inlines_called, sym);
1339 }
1340
1341 static void process_inlines(void)
1342 {
1343         struct symbol *tmp;
1344
1345         FOR_EACH_PTR(inlines_called, tmp) {
1346                 split_function(tmp);
1347         } END_FOR_EACH_PTR(tmp);
1348         free_ptr_list(&inlines_called);
1349 }
1350
1351 static struct symbol *get_last_scoped_symbol(struct symbol_list *big_list, int use_static)
1352 {
1353         struct symbol *sym;
1354
1355         FOR_EACH_PTR_REVERSE(big_list, sym) {
1356                 if (!sym->scope)
1357                         continue;
1358                 if (use_static && sym->ctype.modifiers & MOD_STATIC)
1359                         return sym;
1360                 if (!use_static && !(sym->ctype.modifiers & MOD_STATIC))
1361                         return sym;
1362         } END_FOR_EACH_PTR_REVERSE(sym);
1363
1364         return NULL;
1365 }
1366
1367 static void split_inlines_in_scope(struct symbol *sym)
1368 {
1369         struct symbol *base;
1370         struct symbol_list *scope_list;
1371         int stream;
1372
1373         scope_list = sym->scope->symbols;
1374         stream = sym->pos.stream;
1375
1376         /* find the last static symbol in the file */
1377         FOR_EACH_PTR_REVERSE(scope_list, sym) {
1378                 if (sym->pos.stream != stream)
1379                         continue;
1380                 if (sym->type != SYM_NODE)
1381                         continue;
1382                 base = get_base_type(sym);
1383                 if (!base)
1384                         continue;
1385                 if (base->type != SYM_FN)
1386                         continue;
1387                 if (!base->inline_stmt)
1388                         continue;
1389                 add_inline_function(sym);
1390         } END_FOR_EACH_PTR_REVERSE(sym);
1391
1392         process_inlines();
1393 }
1394
1395 static void split_inlines(struct symbol_list *sym_list)
1396 {
1397         struct symbol *sym;
1398
1399         sym = get_last_scoped_symbol(sym_list, 0);
1400         if (sym)
1401                 split_inlines_in_scope(sym);
1402         sym = get_last_scoped_symbol(sym_list, 1);
1403         if (sym)
1404                 split_inlines_in_scope(sym);
1405 }
1406
1407 static struct stree *clone_estates_perm(struct stree *orig)
1408 {
1409         struct stree *ret = NULL;
1410         struct sm_state *tmp;
1411
1412         FOR_EACH_SM(orig, tmp) {
1413                 set_state_stree_perm(&ret, tmp->owner, tmp->name, tmp->sym, clone_estate_perm(tmp->state));
1414         } END_FOR_EACH_SM(tmp);
1415
1416         return ret;
1417 }
1418
1419 static void split_functions(struct symbol_list *sym_list)
1420 {
1421         struct symbol *sym;
1422
1423         __unnullify_path();
1424         FOR_EACH_PTR(sym_list, sym) {
1425                 set_position(sym->pos);
1426                 if (sym->type != SYM_NODE || get_base_type(sym)->type != SYM_FN) {
1427                         __pass_to_client(sym, BASE_HOOK);
1428                         fake_global_assign(sym);
1429                 }
1430         } END_FOR_EACH_PTR(sym);
1431         global_states = clone_estates_perm(get_all_states_stree(SMATCH_EXTRA));
1432         nullify_path();
1433
1434         FOR_EACH_PTR(sym_list, sym) {
1435                 set_position(sym->pos);
1436                 if (sym->type == SYM_NODE && get_base_type(sym)->type == SYM_FN) {
1437                         split_function(sym);
1438                         process_inlines();
1439                 }
1440         } END_FOR_EACH_PTR(sym);
1441         split_inlines(sym_list);
1442         __pass_to_client(sym_list, END_FILE_HOOK);
1443 }
1444
1445 void smatch(int argc, char **argv)
1446 {
1447
1448         struct string_list *filelist = NULL;
1449         struct symbol_list *sym_list;
1450
1451         if (argc < 2) {
1452                 printf("Usage:  smatch [--debug] <filename.c>\n");
1453                 exit(1);
1454         }
1455         sparse_initialize(argc, argv, &filelist);
1456         set_valid_ptr_max();
1457         FOR_EACH_PTR_NOTAG(filelist, base_file) {
1458                 if (option_file_output) {
1459                         char buf[256];
1460
1461                         snprintf(buf, sizeof(buf), "%s.smatch", base_file);
1462                         sm_outfd = fopen(buf, "w");
1463                         if (!sm_outfd) {
1464                                 printf("Error:  Cannot open %s\n", base_file);
1465                                 exit(1);
1466                         }
1467                 }
1468                 sym_list = sparse_keep_tokens(base_file);
1469                 split_functions(sym_list);
1470         } END_FOR_EACH_PTR_NOTAG(base_file);
1471 }