1 /* 2 * Copyright (c) 2015 SAP SE. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "misc_aix.hpp" 26 #include "runtime/stubRoutines.hpp" 27 28 #include <pthread.h> 29 #include <unistd.h> 30 #include <errno.h> 31 32 void MiscUtils::init_critsect(MiscUtils::critsect_t* cs) { 33 const int rc = pthread_mutex_init(cs, NULL); 34 assert0(rc == 0); 35 } 36 37 void MiscUtils::free_critsect(MiscUtils::critsect_t* cs) { 38 const int rc = pthread_mutex_destroy(cs); 39 assert0(rc == 0); 40 } 41 42 void MiscUtils::enter_critsect(MiscUtils::critsect_t* cs) { 43 const int rc = pthread_mutex_lock(cs); 44 assert0(rc == 0); 45 } 46 47 void MiscUtils::leave_critsect(MiscUtils::critsect_t* cs) { 48 const int rc = pthread_mutex_unlock(cs); 49 assert0(rc == 0); 50 } 51 52 bool MiscUtils::is_readable_pointer(const void* p) { 53 if (!CanUseSafeFetch32()) { 54 return true; 55 } 56 int* const aligned = (int*) align_down(p, 4); 57 int cafebabe = 0xcafebabe; 58 int deadbeef = 0xdeadbeef; 59 return (SafeFetch32(aligned, cafebabe) != cafebabe) || 60 (SafeFetch32(aligned, deadbeef) != deadbeef); 61 } 62 63