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comparison src/os_cpu/linux_x86/vm/atomic_linux_x86.inline.hpp @ 2114:4fc084dac61e

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7009756: volatile variables could be broken throw reflection API Summary: Use Atomic::load() and Atomic::store() to access a volatile long. Reviewed-by: iveresov, jrose, dholmes, never
author kvn
date Fri, 07 Jan 2011 10:16:57 -0800
parents f95d63e2154a
children 63e54c37ac64
comparison
equal deleted inserted replaced
2113:0e52ef6e94d3 2114:4fc084dac61e
1 /* 1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
98 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp) 98 : "r" (exchange_value), "a" (compare_value), "r" (dest), "r" (mp)
99 : "cc", "memory"); 99 : "cc", "memory");
100 return exchange_value; 100 return exchange_value;
101 } 101 }
102 102
103 extern "C" {
104 // defined in linux_x86.s
105 jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool);
106 }
107
108 #ifdef AMD64 103 #ifdef AMD64
109 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 104 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
110 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 105 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
111 106
112 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 107 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
162 157
163 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 158 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
164 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); 159 return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value);
165 } 160 }
166 161
167 #else 162 inline jlong Atomic::load(volatile jlong* src) { return *src; }
168 //inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } 163
169 //inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } 164 #else // !AMD64
170 165
171 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { 166 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
172 return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest); 167 return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest);
173 } 168 }
174 169
187 182
188 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { 183 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
189 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); 184 return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
190 } 185 }
191 186
187 extern "C" {
188 // defined in linux_x86.s
189 jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong, bool);
190 void _Atomic_move_long(volatile jlong* src, volatile jlong* dst);
191 }
192
192 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { 193 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
193 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP()); 194 return _Atomic_cmpxchg_long(exchange_value, dest, compare_value, os::is_MP());
194 } 195 }
195 196
196 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { 197 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
198 } 199 }
199 200
200 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { 201 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
201 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); 202 return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value);
202 } 203 }
204
205 inline jlong Atomic::load(volatile jlong* src) {
206 volatile jlong dest;
207 _Atomic_move_long(src, &dest);
208 return dest;
209 }
210
211 inline void Atomic::store(jlong store_value, jlong* dest) {
212 _Atomic_move_long((volatile jlong*)&store_value, (volatile jlong*)dest);
213 }
214
215 inline void Atomic::store(jlong store_value, volatile jlong* dest) {
216 _Atomic_move_long((volatile jlong*)&store_value, dest);
217 }
218
203 #endif // AMD64 219 #endif // AMD64
204 220
205 #endif // OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_INLINE_HPP 221 #endif // OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_INLINE_HPP