1 /* 2 * Copyright (C) 2016 Oracle. 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 * Copyright 2019 Joyent, Inc. 18 */ 19 20 /* 21 * Heavily borrowed from check_wine.c: what we're doing here is teaching smatch 22 * that cmn_err(CE_PANIC, ...) is noreturn. 23 */ 24 25 #include "scope.h" 26 #include "smatch.h" 27 #include "smatch_extra.h" 28 29 #define CE_PANIC (3) 30 31 void match_cmn_err(const char *fn, struct expression *expr, 32 void *unused) 33 { 34 struct expression *arg; 35 sval_t sval; 36 37 arg = get_argument_from_call_expr(expr->args, 0); 38 if (!get_implied_value(arg, &sval)) 39 return; 40 41 if (sval.value == CE_PANIC) 42 nullify_path(); 43 } 44 45 46 void check_cmn_err(int id) 47 { 48 if (option_project != PROJ_ILLUMOS_KERNEL) 49 return; 50 51 add_function_hook("cmn_err", &match_cmn_err, NULL); 52 } 53