1 /* 2 * Copyright (c) 1997, 2019, 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 #ifndef SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP 26 #define SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP 27 28 #include "memory/allocation.hpp" 29 #include "runtime/thread.hpp" 30 31 // A NoSafepointVerifier object will throw an assertion failure if 32 // the current thread passes a possible safepoint while this object is 33 // instantiated. A safepoint, will either be: an oop allocation, blocking 34 // on a Mutex or JavaLock, or executing a VM operation. 35 // 36 class NoSafepointVerifier : public StackObj { 37 friend class PauseNoSafepointVerifier; 38 39 private: 40 Thread *_thread; 41 public: 42 NoSafepointVerifier() NOT_DEBUG_RETURN; 43 ~NoSafepointVerifier() NOT_DEBUG_RETURN; 44 }; 45 46 // A PauseNoSafepointVerifier is used to temporarily pause the 47 // behavior of a NoSafepointVerifier object. 48 49 class PauseNoSafepointVerifier : public StackObj { 50 private: 51 NoSafepointVerifier* _nsv; 52 53 public: 54 PauseNoSafepointVerifier(NoSafepointVerifier* nsv) NOT_DEBUG_RETURN; 55 ~PauseNoSafepointVerifier() NOT_DEBUG_RETURN; 56 }; 57 58 #endif // SHARE_RUNTIME_SAFEPOINTVERIFIERS_HPP 59