Mercurial > hg > graal-compiler
view src/share/vm/runtime/threadLocalStorage.hpp @ 1518:3bfae429e2cf
6948537: CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT
Summary: On sun4v/CMT avoid use of memset() in BOT updates so as to prevent concurrent BOT readers from seeing the phantom zeros arising from memset()'s use of BIS.
Reviewed-by: jmasa, johnc, minqi, poonam, tonyp
author | ysr |
---|---|
date | Mon, 03 May 2010 10:24:51 -0700 |
parents | 9ee9cf798b59 |
children | c18cbe5936b8 |
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/* * Copyright 1997-2008 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. * */ // Interface for thread local storage // Fast variant of ThreadLocalStorage::get_thread_slow extern "C" Thread* get_thread(); // Get raw thread id: e.g., %g7 on sparc, fs or gs on x86 extern "C" uintptr_t _raw_thread_id(); class ThreadLocalStorage : AllStatic { public: static void set_thread(Thread* thread); static Thread* get_thread_slow(); static void invalidate_all() { pd_invalidate_all(); } // Machine dependent stuff #include "incls/_threadLS_pd.hpp.incl" public: // Accessor static inline int thread_index() { return _thread_index; } static inline void set_thread_index(int index) { _thread_index = index; } // Initialization // Called explicitly from VMThread::activate_system instead of init_globals. static void init(); static bool is_initialized(); private: static int _thread_index; static void generate_code_for_get_thread(); // Processor dependent parts of set_thread and initialization static void pd_set_thread(Thread* thread); static void pd_init(); // Invalidate any thread cacheing or optimization schemes. static void pd_invalidate_all(); };