Mercurial > hg > graal-jvmci-8
view src/share/vm/prims/jvmtiUtil.hpp @ 1888:a7214d79fcf1
6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data
Summary: Deprecated HandlePromotionFailure, removing the ability to turn off that feature, did away with one epoch look-ahead when deciding if a scavenge is likely to fail, relying on current data.
Reviewed-by: jmasa, johnc, poonam
author | ysr |
---|---|
date | Sat, 23 Oct 2010 23:03:49 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
line wrap: on
line source
/* * Copyright (c) 1999, 2007, Oracle and/or its affiliates. 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. * */ /////////////////////////////////////////////////////////////// // // class JvmtiUtil // // class for miscellaneous jvmti utility static methods // class JvmtiUtil : AllStatic { static ResourceArea* _single_threaded_resource_area; static const char* _error_names[]; static const bool _event_threaded[]; public: static ResourceArea* single_threaded_resource_area(); static const char* error_name(int num) { return _error_names[num]; } // To Do: add range checking static const bool has_event_capability(jvmtiEvent event_type, const jvmtiCapabilities* capabilities_ptr); static const bool event_threaded(int num) { if (num >= JVMTI_MIN_EVENT_TYPE_VAL && num <= JVMTI_MAX_EVENT_TYPE_VAL) { return _event_threaded[num]; } if (num >= EXT_MIN_EVENT_TYPE_VAL && num <= EXT_MAX_EVENT_TYPE_VAL) { return false; } ShouldNotReachHere(); return false; } }; /////////////////////////////////////////////////////////////// // // class SafeResourceMark // // ResourceMarks that work before threads exist // class SafeResourceMark : public ResourceMark { ResourceArea* safe_resource_area() { Thread* thread; if (Threads::number_of_threads() == 0) { return JvmtiUtil::single_threaded_resource_area(); } thread = ThreadLocalStorage::thread(); if (thread == NULL) { return JvmtiUtil::single_threaded_resource_area(); } return thread->resource_area(); } public: SafeResourceMark() : ResourceMark(safe_resource_area()) {} };