Mercurial > hg > graal-jvmci-8
view src/share/vm/runtime/jniPeriodicChecker.hpp @ 94:0834225a7916
6634032: CMS: Need CMSInitiatingPermOccupancyFraction for perm, divorcing from CMSInitiatingOccupancyFraction
Summary: The option CMSInitiatingPermOccupancyFraction now controls perm triggering threshold. Even though the actual value of the threshold has not yet been changed, so there is no change in policy, we now have the infrastructure in place for dynamically deciding when to collect the perm gen, an issue that will be addressed in the near future.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Sun, 16 Mar 2008 21:57:25 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ class JniPeriodicCheckerTask; /* * This gets activated under Xcheck:jni (CheckJNICalls), and is typically * to detect any errors caused by JNI applications, such as signal handler, * hijacking, va 0x0 hijacking either by mmap or an OS error. */ class JniPeriodicChecker : AllStatic { friend class JniPeriodicCheckerTask; private: static JniPeriodicCheckerTask* _task; public: // Start/stop task static void engage(); static void disengage(); static bool is_active() { return _task != NULL; } static void initialize(); static void destroy(); }; void jniPeriodicChecker_exit();