Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/bytes_sparc.hpp @ 6812:988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
Summary: The clipping code in the routine that sets the bits for a range of cards, in the liveness accounting verification code was incorrect. It set all the bits in the card bitmap from the given starting index which would lead to spurious marking verification failures.
Reviewed-by: brutisso, jwilhelm, jmasa
| author | johnc |
|---|---|
| date | Thu, 27 Sep 2012 15:44:01 -0700 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef CPU_SPARC_VM_BYTES_SPARC_HPP |
| 26 #define CPU_SPARC_VM_BYTES_SPARC_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 | |
| 0 | 30 class Bytes: AllStatic { |
| 31 public: | |
| 32 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering | |
| 33 // Sparc needs to check for alignment. | |
| 34 | |
| 35 // can I count on address always being a pointer to an unsigned char? Yes | |
| 36 | |
| 37 // Returns true, if the byte ordering used by Java is different from the nativ byte ordering | |
| 38 // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc. | |
| 39 static inline bool is_Java_byte_ordering_different() { return false; } | |
| 40 | |
| 41 // Thus, a swap between native and Java ordering is always a no-op: | |
| 42 static inline u2 swap_u2(u2 x) { return x; } | |
| 43 static inline u4 swap_u4(u4 x) { return x; } | |
| 44 static inline u8 swap_u8(u8 x) { return x; } | |
| 45 | |
| 46 static inline u2 get_native_u2(address p){ | |
| 47 return (intptr_t(p) & 1) == 0 | |
| 48 ? *(u2*)p | |
| 49 : ( u2(p[0]) << 8 ) | |
| 50 | ( u2(p[1]) ); | |
| 51 } | |
| 52 | |
| 53 static inline u4 get_native_u4(address p) { | |
| 54 switch (intptr_t(p) & 3) { | |
| 55 case 0: return *(u4*)p; | |
| 56 | |
| 57 case 2: return ( u4( ((u2*)p)[0] ) << 16 ) | |
| 58 | ( u4( ((u2*)p)[1] ) ); | |
| 59 | |
| 60 default: return ( u4(p[0]) << 24 ) | |
| 61 | ( u4(p[1]) << 16 ) | |
| 62 | ( u4(p[2]) << 8 ) | |
| 63 | u4(p[3]); | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 static inline u8 get_native_u8(address p) { | |
| 68 switch (intptr_t(p) & 7) { | |
| 69 case 0: return *(u8*)p; | |
| 70 | |
| 71 case 4: return ( u8( ((u4*)p)[0] ) << 32 ) | |
| 72 | ( u8( ((u4*)p)[1] ) ); | |
| 73 | |
| 74 case 2: return ( u8( ((u2*)p)[0] ) << 48 ) | |
| 75 | ( u8( ((u2*)p)[1] ) << 32 ) | |
| 76 | ( u8( ((u2*)p)[2] ) << 16 ) | |
| 77 | ( u8( ((u2*)p)[3] ) ); | |
| 78 | |
| 79 default: return ( u8(p[0]) << 56 ) | |
| 80 | ( u8(p[1]) << 48 ) | |
| 81 | ( u8(p[2]) << 40 ) | |
| 82 | ( u8(p[3]) << 32 ) | |
| 83 | ( u8(p[4]) << 24 ) | |
| 84 | ( u8(p[5]) << 16 ) | |
| 85 | ( u8(p[6]) << 8 ) | |
| 86 | u8(p[7]); | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 | |
| 91 | |
| 92 static inline void put_native_u2(address p, u2 x) { | |
| 93 if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x; | |
| 94 else { | |
| 95 p[0] = x >> 8; | |
| 96 p[1] = x; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 static inline void put_native_u4(address p, u4 x) { | |
| 101 switch ( intptr_t(p) & 3 ) { | |
| 102 case 0: *(u4*)p = x; | |
| 103 break; | |
| 104 | |
| 105 case 2: ((u2*)p)[0] = x >> 16; | |
| 106 ((u2*)p)[1] = x; | |
| 107 break; | |
| 108 | |
| 109 default: ((u1*)p)[0] = x >> 24; | |
| 110 ((u1*)p)[1] = x >> 16; | |
| 111 ((u1*)p)[2] = x >> 8; | |
| 112 ((u1*)p)[3] = x; | |
| 113 break; | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 static inline void put_native_u8(address p, u8 x) { | |
| 118 switch ( intptr_t(p) & 7 ) { | |
| 119 case 0: *(u8*)p = x; | |
| 120 break; | |
| 121 | |
| 122 case 4: ((u4*)p)[0] = x >> 32; | |
| 123 ((u4*)p)[1] = x; | |
| 124 break; | |
| 125 | |
| 126 case 2: ((u2*)p)[0] = x >> 48; | |
| 127 ((u2*)p)[1] = x >> 32; | |
| 128 ((u2*)p)[2] = x >> 16; | |
| 129 ((u2*)p)[3] = x; | |
| 130 break; | |
| 131 | |
| 132 default: ((u1*)p)[0] = x >> 56; | |
| 133 ((u1*)p)[1] = x >> 48; | |
| 134 ((u1*)p)[2] = x >> 40; | |
| 135 ((u1*)p)[3] = x >> 32; | |
| 136 ((u1*)p)[4] = x >> 24; | |
| 137 ((u1*)p)[5] = x >> 16; | |
| 138 ((u1*)p)[6] = x >> 8; | |
| 139 ((u1*)p)[7] = x; | |
| 140 } | |
| 141 } | |
| 142 | |
| 143 | |
| 144 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering) | |
| 145 // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented) | |
| 146 static inline u2 get_Java_u2(address p) { return get_native_u2(p); } | |
| 147 static inline u4 get_Java_u4(address p) { return get_native_u4(p); } | |
| 148 static inline u8 get_Java_u8(address p) { return get_native_u8(p); } | |
| 149 | |
| 150 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } | |
| 151 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } | |
| 152 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } | |
| 153 }; | |
| 154 | |
| 155 //Reconciliation History | |
| 156 // 1.7 98/02/24 10:18:41 bytes_i486.hpp | |
| 157 // 1.10 98/04/08 18:47:57 bytes_i486.hpp | |
| 158 // 1.13 98/07/15 17:10:03 bytes_i486.hpp | |
| 159 // 1.14 98/08/13 10:38:23 bytes_i486.hpp | |
| 160 // 1.15 98/10/05 16:30:21 bytes_i486.hpp | |
| 161 // 1.17 99/06/22 16:37:35 bytes_i486.hpp | |
| 162 //End | |
| 1972 | 163 |
| 164 #endif // CPU_SPARC_VM_BYTES_SPARC_HPP |