Mercurial > hg > truffle
annotate src/share/vm/utilities/copy.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | d93949c5bdcc |
| children | b92c45f2bc75 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
196
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_UTILITIES_COPY_HPP |
| 26 #define SHARE_VM_UTILITIES_COPY_HPP | |
| 27 | |
| 28 #include "runtime/stubRoutines.hpp" | |
| 29 | |
| 0 | 30 // Assembly code for platforms that need it. |
| 31 extern "C" { | |
| 32 void _Copy_conjoint_words(HeapWord* from, HeapWord* to, size_t count); | |
| 33 void _Copy_disjoint_words(HeapWord* from, HeapWord* to, size_t count); | |
| 34 | |
| 35 void _Copy_conjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count); | |
| 36 void _Copy_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count); | |
| 37 | |
| 38 void _Copy_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count); | |
| 39 void _Copy_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count); | |
| 40 | |
| 41 void _Copy_conjoint_bytes(void* from, void* to, size_t count); | |
| 42 | |
| 43 void _Copy_conjoint_bytes_atomic (void* from, void* to, size_t count); | |
| 44 void _Copy_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count); | |
| 45 void _Copy_conjoint_jints_atomic (jint* from, jint* to, size_t count); | |
| 46 void _Copy_conjoint_jlongs_atomic (jlong* from, jlong* to, size_t count); | |
| 47 void _Copy_conjoint_oops_atomic (oop* from, oop* to, size_t count); | |
| 48 | |
| 49 void _Copy_arrayof_conjoint_bytes (HeapWord* from, HeapWord* to, size_t count); | |
| 50 void _Copy_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count); | |
| 51 void _Copy_arrayof_conjoint_jints (HeapWord* from, HeapWord* to, size_t count); | |
| 52 void _Copy_arrayof_conjoint_jlongs (HeapWord* from, HeapWord* to, size_t count); | |
| 53 void _Copy_arrayof_conjoint_oops (HeapWord* from, HeapWord* to, size_t count); | |
| 54 } | |
| 55 | |
| 56 class Copy : AllStatic { | |
| 57 public: | |
| 58 // Block copy methods have four attributes. We don't define all possibilities. | |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
59 // alignment: aligned to BytesPerLong |
| 0 | 60 // arrayof: arraycopy operation with both operands aligned on the same |
| 61 // boundary as the first element of an array of the copy unit. | |
| 62 // This is currently a HeapWord boundary on all platforms, except | |
| 63 // for long and double arrays, which are aligned on an 8-byte | |
| 64 // boundary on all platforms. | |
| 65 // arraycopy operations are implicitly atomic on each array element. | |
| 66 // overlap: disjoint or conjoint. | |
| 67 // copy unit: bytes or words (i.e., HeapWords) or oops (i.e., pointers). | |
| 68 // atomicity: atomic or non-atomic on the copy unit. | |
| 69 // | |
| 70 // Names are constructed thusly: | |
| 71 // | |
| 72 // [ 'aligned_' | 'arrayof_' ] | |
| 73 // ('conjoint_' | 'disjoint_') | |
| 74 // ('words' | 'bytes' | 'jshorts' | 'jints' | 'jlongs' | 'oops') | |
| 75 // [ '_atomic' ] | |
| 76 // | |
| 77 // Except in the arrayof case, whatever the alignment is, we assume we can copy | |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
78 // whole alignment units. E.g., if BytesPerLong is 2x word alignment, an odd |
| 0 | 79 // count may copy an extra word. In the arrayof case, we are allowed to copy |
| 80 // only the number of copy units specified. | |
|
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
81 // |
|
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
82 // All callees check count for 0. |
|
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
83 // |
| 0 | 84 |
| 85 // HeapWords | |
| 86 | |
| 87 // Word-aligned words, conjoint, not atomic on each word | |
| 88 static void conjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 89 assert_params_ok(from, to, LogHeapWordSize); | |
| 90 pd_conjoint_words(from, to, count); | |
| 91 } | |
| 92 | |
| 93 // Word-aligned words, disjoint, not atomic on each word | |
| 94 static void disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 95 assert_params_ok(from, to, LogHeapWordSize); | |
| 96 assert_disjoint(from, to, count); | |
| 97 pd_disjoint_words(from, to, count); | |
| 98 } | |
| 99 | |
| 100 // Word-aligned words, disjoint, atomic on each word | |
| 101 static void disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) { | |
| 102 assert_params_ok(from, to, LogHeapWordSize); | |
| 103 assert_disjoint(from, to, count); | |
| 104 pd_disjoint_words_atomic(from, to, count); | |
| 105 } | |
| 106 | |
| 107 // Object-aligned words, conjoint, not atomic on each word | |
| 108 static void aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 109 assert_params_aligned(from, to); | |
| 110 pd_aligned_conjoint_words(from, to, count); | |
| 111 } | |
| 112 | |
| 113 // Object-aligned words, disjoint, not atomic on each word | |
| 114 static void aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { | |
| 115 assert_params_aligned(from, to); | |
| 116 assert_disjoint(from, to, count); | |
| 117 pd_aligned_disjoint_words(from, to, count); | |
| 118 } | |
| 119 | |
| 120 // bytes, jshorts, jints, jlongs, oops | |
| 121 | |
| 122 // bytes, conjoint, not atomic on each byte (not that it matters) | |
|
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
123 static void conjoint_jbytes(void* from, void* to, size_t count) { |
| 0 | 124 pd_conjoint_bytes(from, to, count); |
| 125 } | |
| 126 | |
| 127 // bytes, conjoint, atomic on each byte (not that it matters) | |
|
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
128 static void conjoint_jbytes_atomic(void* from, void* to, size_t count) { |
| 0 | 129 pd_conjoint_bytes(from, to, count); |
| 130 } | |
| 131 | |
| 132 // jshorts, conjoint, atomic on each jshort | |
| 133 static void conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { | |
| 134 assert_params_ok(from, to, LogBytesPerShort); | |
| 135 pd_conjoint_jshorts_atomic(from, to, count); | |
| 136 } | |
| 137 | |
| 138 // jints, conjoint, atomic on each jint | |
| 139 static void conjoint_jints_atomic(jint* from, jint* to, size_t count) { | |
| 140 assert_params_ok(from, to, LogBytesPerInt); | |
| 141 pd_conjoint_jints_atomic(from, to, count); | |
| 142 } | |
| 143 | |
| 144 // jlongs, conjoint, atomic on each jlong | |
| 145 static void conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { | |
| 146 assert_params_ok(from, to, LogBytesPerLong); | |
| 147 pd_conjoint_jlongs_atomic(from, to, count); | |
| 148 } | |
| 149 | |
| 150 // oops, conjoint, atomic on each oop | |
| 151 static void conjoint_oops_atomic(oop* from, oop* to, size_t count) { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
152 assert_params_ok(from, to, LogBytesPerHeapOop); |
| 0 | 153 pd_conjoint_oops_atomic(from, to, count); |
| 154 } | |
| 155 | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
156 // overloaded for UseCompressedOops |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
157 static void conjoint_oops_atomic(narrowOop* from, narrowOop* to, size_t count) { |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
158 assert(sizeof(narrowOop) == sizeof(jint), "this cast is wrong"); |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
159 assert_params_ok(from, to, LogBytesPerInt); |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
160 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count); |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
161 } |
|
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
162 |
| 0 | 163 // Copy a span of memory. If the span is an integral number of aligned |
| 164 // longs, words, or ints, copy those units atomically. | |
| 165 // The largest atomic transfer unit is 8 bytes, or the largest power | |
| 166 // of two which divides all of from, to, and size, whichever is smaller. | |
| 167 static void conjoint_memory_atomic(void* from, void* to, size_t size); | |
| 168 | |
| 169 // bytes, conjoint array, atomic on each byte (not that it matters) | |
|
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1579
diff
changeset
|
170 static void arrayof_conjoint_jbytes(HeapWord* from, HeapWord* to, size_t count) { |
| 0 | 171 pd_arrayof_conjoint_bytes(from, to, count); |
| 172 } | |
| 173 | |
| 174 // jshorts, conjoint array, atomic on each jshort | |
| 175 static void arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) { | |
| 176 assert_params_ok(from, to, LogBytesPerShort); | |
| 177 pd_arrayof_conjoint_jshorts(from, to, count); | |
| 178 } | |
| 179 | |
| 180 // jints, conjoint array, atomic on each jint | |
| 181 static void arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) { | |
| 182 assert_params_ok(from, to, LogBytesPerInt); | |
| 183 pd_arrayof_conjoint_jints(from, to, count); | |
| 184 } | |
| 185 | |
| 186 // jlongs, conjoint array, atomic on each jlong | |
| 187 static void arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) { | |
| 188 assert_params_ok(from, to, LogBytesPerLong); | |
| 189 pd_arrayof_conjoint_jlongs(from, to, count); | |
| 190 } | |
| 191 | |
| 192 // oops, conjoint array, atomic on each oop | |
| 193 static void arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) { | |
|
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
194 assert_params_ok(from, to, LogBytesPerHeapOop); |
| 0 | 195 pd_arrayof_conjoint_oops(from, to, count); |
| 196 } | |
| 197 | |
| 198 // Known overlap methods | |
| 199 | |
| 200 // Copy word-aligned words from higher to lower addresses, not atomic on each word | |
| 201 inline static void conjoint_words_to_lower(HeapWord* from, HeapWord* to, size_t byte_count) { | |
| 202 // byte_count is in bytes to check its alignment | |
| 203 assert_params_ok(from, to, LogHeapWordSize); | |
| 204 assert_byte_count_ok(byte_count, HeapWordSize); | |
| 205 | |
| 206 size_t count = (size_t)round_to(byte_count, HeapWordSize) >> LogHeapWordSize; | |
| 207 assert(to <= from || from + count <= to, "do not overwrite source data"); | |
| 208 | |
| 209 while (count-- > 0) { | |
| 210 *to++ = *from++; | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 // Copy word-aligned words from lower to higher addresses, not atomic on each word | |
| 215 inline static void conjoint_words_to_higher(HeapWord* from, HeapWord* to, size_t byte_count) { | |
| 216 // byte_count is in bytes to check its alignment | |
| 217 assert_params_ok(from, to, LogHeapWordSize); | |
| 218 assert_byte_count_ok(byte_count, HeapWordSize); | |
| 219 | |
| 220 size_t count = (size_t)round_to(byte_count, HeapWordSize) >> LogHeapWordSize; | |
| 221 assert(from <= to || to + count <= from, "do not overwrite source data"); | |
| 222 | |
| 223 from += count - 1; | |
| 224 to += count - 1; | |
| 225 while (count-- > 0) { | |
| 226 *to-- = *from--; | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 // Fill methods | |
| 231 | |
| 232 // Fill word-aligned words, not atomic on each word | |
| 233 // set_words | |
| 234 static void fill_to_words(HeapWord* to, size_t count, juint value = 0) { | |
| 235 assert_params_ok(to, LogHeapWordSize); | |
| 236 pd_fill_to_words(to, count, value); | |
| 237 } | |
| 238 | |
| 239 static void fill_to_aligned_words(HeapWord* to, size_t count, juint value = 0) { | |
| 240 assert_params_aligned(to); | |
| 241 pd_fill_to_aligned_words(to, count, value); | |
| 242 } | |
| 243 | |
| 244 // Fill bytes | |
| 245 static void fill_to_bytes(void* to, size_t count, jubyte value = 0) { | |
| 246 pd_fill_to_bytes(to, count, value); | |
| 247 } | |
| 248 | |
| 249 // Fill a span of memory. If the span is an integral number of aligned | |
| 250 // longs, words, or ints, store to those units atomically. | |
| 251 // The largest atomic transfer unit is 8 bytes, or the largest power | |
| 252 // of two which divides both to and size, whichever is smaller. | |
| 253 static void fill_to_memory_atomic(void* to, size_t size, jubyte value = 0); | |
| 254 | |
| 255 // Zero-fill methods | |
| 256 | |
| 257 // Zero word-aligned words, not atomic on each word | |
| 258 static void zero_to_words(HeapWord* to, size_t count) { | |
| 259 assert_params_ok(to, LogHeapWordSize); | |
| 260 pd_zero_to_words(to, count); | |
| 261 } | |
| 262 | |
| 263 // Zero bytes | |
| 264 static void zero_to_bytes(void* to, size_t count) { | |
| 265 pd_zero_to_bytes(to, count); | |
| 266 } | |
| 267 | |
| 268 private: | |
| 269 static bool params_disjoint(HeapWord* from, HeapWord* to, size_t count) { | |
| 270 if (from < to) { | |
| 271 return pointer_delta(to, from) >= count; | |
| 272 } | |
| 273 return pointer_delta(from, to) >= count; | |
| 274 } | |
| 275 | |
| 276 // These methods raise a fatal if they detect a problem. | |
| 277 | |
| 278 static void assert_disjoint(HeapWord* from, HeapWord* to, size_t count) { | |
| 279 #ifdef ASSERT | |
| 280 if (!params_disjoint(from, to, count)) | |
| 281 basic_fatal("source and dest overlap"); | |
| 282 #endif | |
| 283 } | |
| 284 | |
| 285 static void assert_params_ok(void* from, void* to, intptr_t log_align) { | |
| 286 #ifdef ASSERT | |
| 287 if (mask_bits((uintptr_t)from, right_n_bits(log_align)) != 0) | |
| 288 basic_fatal("not aligned"); | |
| 289 if (mask_bits((uintptr_t)to, right_n_bits(log_align)) != 0) | |
| 290 basic_fatal("not aligned"); | |
| 291 #endif | |
| 292 } | |
| 293 | |
| 294 static void assert_params_ok(HeapWord* to, intptr_t log_align) { | |
| 295 #ifdef ASSERT | |
| 296 if (mask_bits((uintptr_t)to, right_n_bits(log_align)) != 0) | |
| 297 basic_fatal("not word aligned"); | |
| 298 #endif | |
| 299 } | |
| 300 static void assert_params_aligned(HeapWord* from, HeapWord* to) { | |
| 301 #ifdef ASSERT | |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
302 if (mask_bits((uintptr_t)from, BytesPerLong-1) != 0) |
|
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
303 basic_fatal("not long aligned"); |
|
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
304 if (mask_bits((uintptr_t)to, BytesPerLong-1) != 0) |
|
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
305 basic_fatal("not long aligned"); |
| 0 | 306 #endif |
| 307 } | |
| 308 | |
| 309 static void assert_params_aligned(HeapWord* to) { | |
| 310 #ifdef ASSERT | |
|
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
311 if (mask_bits((uintptr_t)to, BytesPerLong-1) != 0) |
|
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
196
diff
changeset
|
312 basic_fatal("not long aligned"); |
| 0 | 313 #endif |
| 314 } | |
| 315 | |
| 316 static void assert_byte_count_ok(size_t byte_count, size_t unit_size) { | |
| 317 #ifdef ASSERT | |
| 318 if ((size_t)round_to(byte_count, unit_size) != byte_count) { | |
| 319 basic_fatal("byte count must be aligned"); | |
| 320 } | |
| 321 #endif | |
| 322 } | |
| 323 | |
| 324 // Platform dependent implementations of the above methods. | |
| 1972 | 325 #ifdef TARGET_ARCH_x86 |
| 326 # include "copy_x86.hpp" | |
| 327 #endif | |
| 328 #ifdef TARGET_ARCH_sparc | |
| 329 # include "copy_sparc.hpp" | |
| 330 #endif | |
| 331 #ifdef TARGET_ARCH_zero | |
| 332 # include "copy_zero.hpp" | |
| 333 #endif | |
| 334 | |
| 0 | 335 }; |
| 1972 | 336 |
| 337 #endif // SHARE_VM_UTILITIES_COPY_HPP |