Mercurial > hg > graal-compiler
view src/share/vm/runtime/serviceThread.hpp @ 3405:8cbcd406c42e
7042740: CMS: assert(n> q) failed: Looping at: ... blockOffsetTable.cpp:557
Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp
author | ysr |
---|---|
date | Fri, 27 May 2011 15:05:33 -0700 |
parents | bf8517f4e4d0 |
children |
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/* * Copyright (c) 2011, 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. * */ #ifndef SHARE_VM_RUNTIME_SERVICETHREAD_HPP #define SHARE_VM_RUNTIME_SERVICETHREAD_HPP #include "runtime/thread.hpp" // A JavaThread for low memory detection support and JVMTI // compiled-method-load events. class ServiceThread : public JavaThread { friend class VMStructs; private: static ServiceThread* _instance; static void service_thread_entry(JavaThread* thread, TRAPS); ServiceThread(ThreadFunction entry_point) : JavaThread(entry_point) {}; public: static void initialize(); // Hide this thread from external view. bool is_hidden_from_external_view() const { return true; } // Returns true if the passed thread is the service thread. static bool is_service_thread(Thread* thread); }; #endif // SHARE_VM_RUNTIME_SERVICETHREAD_HPP