1*efe51d0cSJohn Levon /* 2*efe51d0cSJohn Levon * Copyright (C) 2016 Oracle. 3*efe51d0cSJohn Levon * 4*efe51d0cSJohn Levon * This program is free software; you can redistribute it and/or 5*efe51d0cSJohn Levon * modify it under the terms of the GNU General Public License 6*efe51d0cSJohn Levon * as published by the Free Software Foundation; either version 2 7*efe51d0cSJohn Levon * of the License, or (at your option) any later version. 8*efe51d0cSJohn Levon * 9*efe51d0cSJohn Levon * This program is distributed in the hope that it will be useful, 10*efe51d0cSJohn Levon * but WITHOUT ANY WARRANTY; without even the implied warranty of 11*efe51d0cSJohn Levon * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12*efe51d0cSJohn Levon * GNU General Public License for more details. 13*efe51d0cSJohn Levon * 14*efe51d0cSJohn Levon * You should have received a copy of the GNU General Public License 15*efe51d0cSJohn Levon * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt 16*efe51d0cSJohn Levon * 17*efe51d0cSJohn Levon * Copyright 2019 Joyent, Inc. 18*efe51d0cSJohn Levon */ 19*efe51d0cSJohn Levon 20*efe51d0cSJohn Levon /* 21*efe51d0cSJohn Levon * Heavily borrowed from check_wine.c: what we're doing here is teaching smatch 22*efe51d0cSJohn Levon * that cmn_err(CE_PANIC, ...) is noreturn. 23*efe51d0cSJohn Levon */ 24*efe51d0cSJohn Levon 25*efe51d0cSJohn Levon #include "scope.h" 26*efe51d0cSJohn Levon #include "smatch.h" 27*efe51d0cSJohn Levon #include "smatch_extra.h" 28*efe51d0cSJohn Levon 29*efe51d0cSJohn Levon #define CE_PANIC (3) 30*efe51d0cSJohn Levon 31*efe51d0cSJohn Levon void match_cmn_err(const char *fn, struct expression *expr, 32*efe51d0cSJohn Levon void *unused) 33*efe51d0cSJohn Levon { 34*efe51d0cSJohn Levon struct expression *arg; 35*efe51d0cSJohn Levon sval_t sval; 36*efe51d0cSJohn Levon 37*efe51d0cSJohn Levon arg = get_argument_from_call_expr(expr->args, 0); 38*efe51d0cSJohn Levon if (!get_implied_value(arg, &sval)) 39*efe51d0cSJohn Levon return; 40*efe51d0cSJohn Levon 41*efe51d0cSJohn Levon if (sval.value == CE_PANIC) 42*efe51d0cSJohn Levon nullify_path(); 43*efe51d0cSJohn Levon } 44*efe51d0cSJohn Levon 45*efe51d0cSJohn Levon 46*efe51d0cSJohn Levon void check_cmn_err(int id) 47*efe51d0cSJohn Levon { 48*efe51d0cSJohn Levon if (option_project != PROJ_ILLUMOS_KERNEL) 49*efe51d0cSJohn Levon return; 50*efe51d0cSJohn Levon 51*efe51d0cSJohn Levon add_function_hook("cmn_err", &match_cmn_err, NULL); 52*efe51d0cSJohn Levon } 53