--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os/aix/misc_aix.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2015 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "misc_aix.hpp"
+#include "runtime/stubRoutines.hpp"
+#include "utilities/align.hpp"
+
+#include <pthread.h>
+#include <unistd.h>
+#include <errno.h>
+
+void MiscUtils::init_critsect(MiscUtils::critsect_t* cs) {
+  const int rc = pthread_mutex_init(cs, NULL);
+  assert0(rc == 0);
+}
+
+void MiscUtils::free_critsect(MiscUtils::critsect_t* cs) {
+  const int rc = pthread_mutex_destroy(cs);
+  assert0(rc == 0);
+}
+
+void MiscUtils::enter_critsect(MiscUtils::critsect_t* cs) {
+  const int rc = pthread_mutex_lock(cs);
+  assert0(rc == 0);
+}
+
+void MiscUtils::leave_critsect(MiscUtils::critsect_t* cs) {
+  const int rc = pthread_mutex_unlock(cs);
+  assert0(rc == 0);
+}
+
+bool MiscUtils::is_readable_pointer(const void* p) {
+  if (!CanUseSafeFetch32()) {
+    return true;
+  }
+  int* const aligned = (int*) align_down(p, 4);
+  int cafebabe = 0xcafebabe;
+  int deadbeef = 0xdeadbeef;
+  return (SafeFetch32(aligned, cafebabe) != cafebabe) ||
+         (SafeFetch32(aligned, deadbeef) != deadbeef);
+}
+
+