misc_aix.cpp revision 9313:4338b5465f50 
1/*
2 * Copyright 2015 SAP AG. 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
30void MiscUtils::init_critsect(MiscUtils::critsect_t* cs) {
31  const int rc = pthread_mutex_init(cs, NULL);
32  assert0(rc == 0);
33}
34
35void MiscUtils::free_critsect(MiscUtils::critsect_t* cs) {
36  const int rc = pthread_mutex_destroy(cs);
37  assert0(rc == 0);
38}
39
40void MiscUtils::enter_critsect(MiscUtils::critsect_t* cs) {
41  const int rc = pthread_mutex_lock(cs);
42  assert0(rc == 0);
43}
44
45void MiscUtils::leave_critsect(MiscUtils::critsect_t* cs) {
46  const int rc = pthread_mutex_unlock(cs);
47  assert0(rc == 0);
48}
49
50bool MiscUtils::is_readable_pointer(const void* p) {
51  if (!CanUseSafeFetch32()) {
52    return true;
53  }
54  int* const aligned = (int*) align_size_down((intptr_t)p, 4);
55  int cafebabe = 0xcafebabe;
56  int deadbeef = 0xdeadbeef;
57  return (SafeFetch32(aligned, cafebabe) != cafebabe) ||
58         (SafeFetch32(aligned, deadbeef) != deadbeef);
59}
60
61
62