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 #include "utilities/align.hpp" 28 29 #include <pthread.h> 30 #include <unistd.h> 31 #include <errno.h> 32 33 void MiscUtils::init_critsect(MiscUtils::critsect_t* cs) { 34 const int rc = pthread_mutex_init(cs, NULL); 35 assert0(rc == 0); 36 } 37 38 void MiscUtils::free_critsect(MiscUtils::critsect_t* cs) { 39 const int rc = pthread_mutex_destroy(cs); 40 assert0(rc == 0); 41 } 42 43 void MiscUtils::enter_critsect(MiscUtils::critsect_t* cs) { 44 const int rc = pthread_mutex_lock(cs); 45 assert0(rc == 0); 46 } 47 48 void MiscUtils::leave_critsect(MiscUtils::critsect_t* cs) { 49 const int rc = pthread_mutex_unlock(cs); 50 assert0(rc == 0); 51 } 52 53 bool MiscUtils::is_readable_pointer(const void* p) { 54 if (!CanUseSafeFetch32()) { 55 return true; 56 } 57 int* const aligned = (int*) align_down(p, 4); 58 int cafebabe = 0xcafebabe; 59 int deadbeef = 0xdeadbeef; 60 return (SafeFetch32(aligned, cafebabe) != cafebabe) || 61 (SafeFetch32(aligned, deadbeef) != deadbeef); 62 } 63 64