Mercurial > hg > truffle
view src/share/vm/runtime/threadLocalStorage.hpp @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
---|---|
date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | 1d1603768966 |
children | f08d439fab8c |
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/* * Copyright (c) 1997, 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_THREADLOCALSTORAGE_HPP #define SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP #include "gc_implementation/shared/gcUtil.hpp" #include "runtime/os.hpp" #include "utilities/top.hpp" // 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 #ifdef TARGET_OS_ARCH_linux_x86 # include "threadLS_linux_x86.hpp" #endif #ifdef TARGET_OS_ARCH_linux_sparc # include "threadLS_linux_sparc.hpp" #endif #ifdef TARGET_OS_ARCH_linux_zero # include "threadLS_linux_zero.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_x86 # include "threadLS_solaris_x86.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_sparc # include "threadLS_solaris_sparc.hpp" #endif #ifdef TARGET_OS_ARCH_windows_x86 # include "threadLS_windows_x86.hpp" #endif #ifdef TARGET_OS_ARCH_linux_arm # include "threadLS_linux_arm.hpp" #endif #ifdef TARGET_OS_ARCH_linux_ppc # include "threadLS_linux_ppc.hpp" #endif 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(); }; #endif // SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP