1/* 2 * Copyright (c) 2007, 2010, 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_VM_RUNTIME_JNIPERIODICCHECKER_HPP 26#define SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP 27 28class JniPeriodicCheckerTask; 29 30/* 31 * This gets activated under Xcheck:jni (CheckJNICalls), and is typically 32 * to detect any errors caused by JNI applications, such as signal handler, 33 * hijacking, va 0x0 hijacking either by mmap or an OS error. 34 */ 35 36 37class JniPeriodicChecker : AllStatic { 38 39 friend class JniPeriodicCheckerTask; 40 41 private: 42 static JniPeriodicCheckerTask* _task; 43 44 public: 45 // Start/stop task 46 static void engage(); 47 static void disengage(); 48 49 static bool is_active() { return _task != NULL; } 50 51 static void initialize(); 52 static void destroy(); 53}; 54 55void jniPeriodicChecker_exit(); 56 57#endif // SHARE_VM_RUNTIME_JNIPERIODICCHECKER_HPP 58