Thu, 27 May 2010 18:01:56 -0700
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
duke@435 | 1 | /* |
xdono@1279 | 2 | * Copyright 2003-2009 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | # include "incls/_precompiled.incl" |
duke@435 | 26 | # include "incls/_orderAccess.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | volatile intptr_t OrderAccess::dummy = 0; |
never@1106 | 29 | |
never@1106 | 30 | void OrderAccess::StubRoutines_fence() { |
never@1106 | 31 | // Use a stub if it exists. It may not exist during bootstrap so do |
never@1106 | 32 | // nothing in that case but assert if no fence code exists after threads have been created |
never@1106 | 33 | void (*func)() = CAST_TO_FN_PTR(void (*)(), StubRoutines::fence_entry()); |
never@1106 | 34 | |
never@1106 | 35 | if (func != NULL) { |
never@1106 | 36 | (*func)(); |
never@1106 | 37 | return; |
never@1106 | 38 | } |
never@1106 | 39 | assert(Threads::number_of_threads() == 0, "for bootstrap only"); |
never@1106 | 40 | } |