1 /*
   2  * Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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 "precompiled.hpp"
  26 #include "gc/shared/collectedHeap.hpp"
  27 #include "memory/universe.hpp"
  28 #include "runtime/safepoint.hpp"
  29 #include "runtime/safepointVerifiers.hpp"
  30 #include "utilities/debug.hpp"
  31 
  32 #ifdef ASSERT
  33 
  34 NoSafepointVerifier::NoSafepointVerifier() : _thread(Thread::current()) {
  35   _thread->_no_safepoint_count++;
  36 }
  37 
  38 NoSafepointVerifier::~NoSafepointVerifier() {
  39   _thread->_no_safepoint_count--;
  40 }
  41 
  42 PauseNoSafepointVerifier::PauseNoSafepointVerifier(NoSafepointVerifier* nsv)
  43     : _nsv(nsv) {
  44   assert(_nsv->_thread == Thread::current(), "must be");
  45   _nsv->_thread->_no_safepoint_count--;
  46 }
  47 
  48 PauseNoSafepointVerifier::~PauseNoSafepointVerifier() {
  49   _nsv->_thread->_no_safepoint_count++;
  50 }
  51 #endif // ASSERT