Mercurial > hg > truffle
view src/os_cpu/bsd_x86/vm/threadLS_bsd_x86.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | f08d439fab8c |
children |
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/* * Copyright (c) 1999, 2010, 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 OS_CPU_BSD_X86_VM_THREADLS_BSD_X86_HPP #define OS_CPU_BSD_X86_VM_THREADLS_BSD_X86_HPP // Processor dependent parts of ThreadLocalStorage #ifndef AMD64 // map stack pointer to thread pointer - see notes in threadLS_bsd_x86.cpp #define SP_BITLENGTH 32 #ifndef PAGE_SHIFT #define PAGE_SHIFT 12 #define PAGE_SIZE (1UL << PAGE_SHIFT) #endif static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)]; #endif // !AMD64 public: #ifndef AMD64 static Thread** sp_map_addr() { return _sp_map; } #endif // !AMD64 static Thread* thread() { #ifdef AMD64 return (Thread*) os::thread_local_storage_at(thread_index()); #else uintptr_t sp; __asm__ volatile ("movl %%esp, %0" : "=r" (sp)); return _sp_map[sp >> PAGE_SHIFT]; #endif // AMD64 } #endif // OS_CPU_BSD_X86_VM_THREADLS_BSD_X86_HPP