Mercurial > hg > truffle
annotate src/os_cpu/linux_sparc/vm/atomic_linux_sparc.inline.hpp @ 2114:4fc084dac61e
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 |
| rev | line source |
|---|---|
| 133 | 1 /* |
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. |
| 133 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 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 | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 133 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP |
| 26 #define OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP | |
| 27 | |
| 28 #include "orderAccess_linux_sparc.inline.hpp" | |
| 29 #include "runtime/atomic.hpp" | |
| 30 #include "runtime/os.hpp" | |
| 31 #include "vm_version_sparc.hpp" | |
| 32 | |
| 133 | 33 // Implementation of class atomic |
| 34 | |
| 35 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } | |
| 36 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } | |
| 37 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } | |
| 38 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } | |
| 39 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } | |
| 40 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } | |
| 41 | |
| 42 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } | |
| 43 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } | |
| 44 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } | |
| 45 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } | |
| 46 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } | |
| 47 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } | |
| 48 | |
| 49 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); } | |
| 50 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); } | |
| 51 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); } | |
| 52 | |
| 53 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); } | |
| 54 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); } | |
| 55 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); } | |
| 56 | |
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7009756: volatile variables could be broken throw reflection API
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57 inline jlong Atomic::load(volatile jlong* src) { return *src; } |
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58 |
| 133 | 59 inline jint Atomic::add (jint add_value, volatile jint* dest) { |
| 60 intptr_t rv; | |
| 61 __asm__ volatile( | |
| 62 "1: \n\t" | |
| 63 " ld [%2], %%o2\n\t" | |
| 64 " add %1, %%o2, %%o3\n\t" | |
| 65 " cas [%2], %%o2, %%o3\n\t" | |
| 66 " cmp %%o2, %%o3\n\t" | |
| 67 " bne 1b\n\t" | |
| 68 " nop\n\t" | |
| 69 " add %1, %%o2, %0\n\t" | |
| 70 : "=r" (rv) | |
| 71 : "r" (add_value), "r" (dest) | |
| 72 : "memory", "o2", "o3"); | |
| 73 return rv; | |
| 74 } | |
| 75 | |
| 76 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { | |
| 77 intptr_t rv; | |
| 78 #ifdef _LP64 | |
| 79 __asm__ volatile( | |
| 80 "1: \n\t" | |
| 81 " ldx [%2], %%o2\n\t" | |
| 82 " add %0, %%o2, %%o3\n\t" | |
| 83 " casx [%2], %%o2, %%o3\n\t" | |
| 84 " cmp %%o2, %%o3\n\t" | |
| 85 " bne %%xcc, 1b\n\t" | |
| 86 " nop\n\t" | |
| 87 " add %0, %%o2, %0\n\t" | |
| 88 : "=r" (rv) | |
| 89 : "r" (add_value), "r" (dest) | |
| 90 : "memory", "o2", "o3"); | |
| 91 #else | |
| 92 __asm__ volatile( | |
| 93 "1: \n\t" | |
| 94 " ld [%2], %%o2\n\t" | |
| 95 " add %1, %%o2, %%o3\n\t" | |
| 96 " cas [%2], %%o2, %%o3\n\t" | |
| 97 " cmp %%o2, %%o3\n\t" | |
| 98 " bne 1b\n\t" | |
| 99 " nop\n\t" | |
| 100 " add %1, %%o2, %0\n\t" | |
| 101 : "=r" (rv) | |
| 102 : "r" (add_value), "r" (dest) | |
| 103 : "memory", "o2", "o3"); | |
| 104 #endif // _LP64 | |
| 105 return rv; | |
| 106 } | |
| 107 | |
| 108 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { | |
| 109 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest); | |
| 110 } | |
| 111 | |
| 112 | |
| 113 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { | |
| 114 intptr_t rv = exchange_value; | |
| 115 __asm__ volatile( | |
| 116 " swap [%2],%1\n\t" | |
| 117 : "=r" (rv) | |
| 118 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) | |
| 119 : "memory"); | |
| 120 return rv; | |
| 121 } | |
| 122 | |
| 123 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { | |
| 124 intptr_t rv = exchange_value; | |
| 125 #ifdef _LP64 | |
| 126 __asm__ volatile( | |
| 127 "1:\n\t" | |
| 128 " mov %1, %%o3\n\t" | |
| 129 " ldx [%2], %%o2\n\t" | |
| 130 " casx [%2], %%o2, %%o3\n\t" | |
| 131 " cmp %%o2, %%o3\n\t" | |
| 132 " bne %%xcc, 1b\n\t" | |
| 133 " nop\n\t" | |
| 134 " mov %%o2, %0\n\t" | |
| 135 : "=r" (rv) | |
| 136 : "r" (exchange_value), "r" (dest) | |
| 137 : "memory", "o2", "o3"); | |
| 138 #else | |
| 139 __asm__ volatile( | |
| 140 "swap [%2],%1\n\t" | |
| 141 : "=r" (rv) | |
| 142 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest) | |
| 143 : "memory"); | |
| 144 #endif // _LP64 | |
| 145 return rv; | |
| 146 } | |
| 147 | |
| 148 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { | |
| 149 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest); | |
| 150 } | |
| 151 | |
| 152 | |
| 153 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { | |
| 154 jint rv; | |
| 155 __asm__ volatile( | |
| 156 " cas [%2], %3, %0" | |
| 157 : "=r" (rv) | |
| 158 : "0" (exchange_value), "r" (dest), "r" (compare_value) | |
| 159 : "memory"); | |
| 160 return rv; | |
| 161 } | |
| 162 | |
| 163 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { | |
| 164 #ifdef _LP64 | |
| 165 jlong rv; | |
| 166 __asm__ volatile( | |
| 167 " casx [%2], %3, %0" | |
| 168 : "=r" (rv) | |
| 169 : "0" (exchange_value), "r" (dest), "r" (compare_value) | |
| 170 : "memory"); | |
| 171 return rv; | |
| 172 #else | |
| 173 assert(VM_Version::v9_instructions_work(), "cas only supported on v9"); | |
| 174 volatile jlong_accessor evl, cvl, rv; | |
| 175 evl.long_value = exchange_value; | |
| 176 cvl.long_value = compare_value; | |
| 177 | |
| 178 __asm__ volatile( | |
| 179 " sllx %2, 32, %2\n\t" | |
| 180 " srl %3, 0, %3\n\t" | |
| 181 " or %2, %3, %2\n\t" | |
| 182 " sllx %5, 32, %5\n\t" | |
| 183 " srl %6, 0, %6\n\t" | |
| 184 " or %5, %6, %5\n\t" | |
| 185 " casx [%4], %5, %2\n\t" | |
| 186 " srl %2, 0, %1\n\t" | |
| 187 " srlx %2, 32, %0\n\t" | |
| 188 : "=r" (rv.words[0]), "=r" (rv.words[1]) | |
| 189 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1]) | |
| 190 : "memory"); | |
| 191 | |
| 192 return rv.long_value; | |
| 193 #endif | |
| 194 } | |
| 195 | |
| 196 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { | |
| 197 intptr_t rv; | |
| 198 #ifdef _LP64 | |
| 199 __asm__ volatile( | |
| 200 " casx [%2], %3, %0" | |
| 201 : "=r" (rv) | |
| 202 : "0" (exchange_value), "r" (dest), "r" (compare_value) | |
| 203 : "memory"); | |
| 204 #else | |
| 205 __asm__ volatile( | |
| 206 " cas [%2], %3, %0" | |
| 207 : "=r" (rv) | |
| 208 : "0" (exchange_value), "r" (dest), "r" (compare_value) | |
| 209 : "memory"); | |
| 210 #endif // _LP64 | |
| 211 return rv; | |
| 212 } | |
| 213 | |
| 214 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { | |
| 215 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value); | |
| 216 } | |
| 1972 | 217 |
| 218 #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP |