--- old/src/hotspot/os_cpu/bsd_zero/orderAccess_bsd_zero.inline.hpp 2018-06-04 20:53:38.527754984 -0400 +++ /dev/null 2018-04-28 00:24:55.164000301 -0400 @@ -1,77 +0,0 @@ -/* - * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. - * Copyright 2007, 2008, 2009 Red Hat, Inc. - * 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_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP -#define OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP - -#include "runtime/orderAccess.hpp" - -#ifdef ARM - -/* - * ARM Kernel helper for memory barrier. - * Using __asm __volatile ("":::"memory") does not work reliable on ARM - * and gcc __sync_synchronize(); implementation does not use the kernel - * helper for all gcc versions so it is unreliable to use as well. - */ -typedef void (__kernel_dmb_t) (void); -#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0) - -#define FULL_MEM_BARRIER __kernel_dmb() -#define LIGHT_MEM_BARRIER __kernel_dmb() - -#else // ARM - -#define FULL_MEM_BARRIER __sync_synchronize() - -#ifdef PPC - -#ifdef __NO_LWSYNC__ -#define LIGHT_MEM_BARRIER __asm __volatile ("sync":::"memory") -#else -#define LIGHT_MEM_BARRIER __asm __volatile ("lwsync":::"memory") -#endif - -#else // PPC - -#define LIGHT_MEM_BARRIER __asm __volatile ("":::"memory") - -#endif // PPC - -#endif // ARM - -// Note: What is meant by LIGHT_MEM_BARRIER is a barrier which is sufficient -// to provide TSO semantics, i.e. StoreStore | LoadLoad | LoadStore. - -inline void OrderAccess::loadload() { LIGHT_MEM_BARRIER; } -inline void OrderAccess::storestore() { LIGHT_MEM_BARRIER; } -inline void OrderAccess::loadstore() { LIGHT_MEM_BARRIER; } -inline void OrderAccess::storeload() { FULL_MEM_BARRIER; } - -inline void OrderAccess::acquire() { LIGHT_MEM_BARRIER; } -inline void OrderAccess::release() { LIGHT_MEM_BARRIER; } -inline void OrderAccess::fence() { FULL_MEM_BARRIER; } - -#endif // OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_INLINE_HPP --- /dev/null 2018-04-28 00:24:55.164000301 -0400 +++ new/src/hotspot/os_cpu/bsd_zero/orderAccess_bsd_zero.hpp 2018-06-04 20:53:37.923698988 -0400 @@ -0,0 +1,77 @@ +/* + * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. + * Copyright 2007, 2008, 2009 Red Hat, Inc. + * 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_ZERO_VM_ORDERACCESS_BSD_ZERO_HPP +#define OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_HPP + +#include "runtime/orderAccess.hpp" + +#ifdef ARM + +/* + * ARM Kernel helper for memory barrier. + * Using __asm __volatile ("":::"memory") does not work reliable on ARM + * and gcc __sync_synchronize(); implementation does not use the kernel + * helper for all gcc versions so it is unreliable to use as well. + */ +typedef void (__kernel_dmb_t) (void); +#define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0) + +#define FULL_MEM_BARRIER __kernel_dmb() +#define LIGHT_MEM_BARRIER __kernel_dmb() + +#else // ARM + +#define FULL_MEM_BARRIER __sync_synchronize() + +#ifdef PPC + +#ifdef __NO_LWSYNC__ +#define LIGHT_MEM_BARRIER __asm __volatile ("sync":::"memory") +#else +#define LIGHT_MEM_BARRIER __asm __volatile ("lwsync":::"memory") +#endif + +#else // PPC + +#define LIGHT_MEM_BARRIER __asm __volatile ("":::"memory") + +#endif // PPC + +#endif // ARM + +// Note: What is meant by LIGHT_MEM_BARRIER is a barrier which is sufficient +// to provide TSO semantics, i.e. StoreStore | LoadLoad | LoadStore. + +inline void OrderAccess::loadload() { LIGHT_MEM_BARRIER; } +inline void OrderAccess::storestore() { LIGHT_MEM_BARRIER; } +inline void OrderAccess::loadstore() { LIGHT_MEM_BARRIER; } +inline void OrderAccess::storeload() { FULL_MEM_BARRIER; } + +inline void OrderAccess::acquire() { LIGHT_MEM_BARRIER; } +inline void OrderAccess::release() { LIGHT_MEM_BARRIER; } +inline void OrderAccess::fence() { FULL_MEM_BARRIER; } + +#endif // OS_CPU_BSD_ZERO_VM_ORDERACCESS_BSD_ZERO_HPP