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comparison src/os_cpu/linux_x86/vm/orderAccess_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 da880ba4edf9
comparison
equal deleted inserted replaced
2113:0e52ef6e94d3 2114:4fc084dac61e
1 /* 1 /*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2003, 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.
23 */ 23 */
24 24
25 #ifndef OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP 25 #ifndef OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP
26 #define OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP 26 #define OS_CPU_LINUX_X86_VM_ORDERACCESS_LINUX_X86_INLINE_HPP
27 27
28 #include "runtime/atomic.hpp"
28 #include "runtime/orderAccess.hpp" 29 #include "runtime/orderAccess.hpp"
29 #include "vm_version_x86.hpp" 30 #include "vm_version_x86.hpp"
30 31
31 // Implementation of class OrderAccess. 32 // Implementation of class OrderAccess.
32 33
62 } 63 }
63 64
64 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; } 65 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; }
65 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; } 66 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; }
66 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; } 67 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; }
67 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return *p; } 68 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return Atomic::load(p); }
68 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; } 69 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; }
69 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; } 70 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; }
70 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; } 71 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; }
71 inline julong OrderAccess::load_acquire(volatile julong* p) { return *p; } 72 inline julong OrderAccess::load_acquire(volatile julong* p) { return Atomic::load((volatile jlong*)p); }
72 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; } 73 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; }
73 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; } 74 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
74 75
75 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; } 76 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; }
76 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; } 77 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; }
77 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; } 78 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; }
78 79
79 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; } 80 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; }
80 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; } 81 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; }
81 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; } 82 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; }
82 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { *p = v; } 83 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { Atomic::store(v, p); }
83 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; } 84 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; }
84 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; } 85 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; }
85 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; } 86 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; }
86 inline void OrderAccess::release_store(volatile julong* p, julong v) { *p = v; } 87 inline void OrderAccess::release_store(volatile julong* p, julong v) { Atomic::store((jlong)v, (volatile jlong*)p); }
87 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; } 88 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; }
88 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; } 89 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
89 90
90 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; } 91 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
91 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; } 92 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; }
176 __asm__ __volatile__ ( "xchgq (%2), %0" 177 __asm__ __volatile__ ( "xchgq (%2), %0"
177 : "=r" (v) 178 : "=r" (v)
178 : "0" (v), "r" (p) 179 : "0" (v), "r" (p)
179 : "memory"); 180 : "memory");
180 #else 181 #else
181 *p = v; fence(); 182 release_store(p, v); fence();
182 #endif // AMD64 183 #endif // AMD64
183 } 184 }
184 185
185 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store_fence((volatile jbyte*)p, (jbyte)v); } 186 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { release_store_fence((volatile jbyte*)p, (jbyte)v); }
186 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store_fence((volatile jshort*)p, (jshort)v); } 187 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store_fence((volatile jshort*)p, (jshort)v); }