Tue, 11 May 2010 14:35:43 -0700
6931180: Migration to recent versions of MS Platform SDK
6951582: Build problems on win64
Summary: Changes to enable building JDK7 with Microsoft Visual Studio 2010
Reviewed-by: ohair, art, ccheung, dcubed
1 /*
2 * Copyright 2003-2008 Sun Microsystems, Inc. All Rights Reserved.
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 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 // Assembly code for platforms that need it.
26 extern "C" {
27 void _Copy_conjoint_words(HeapWord* from, HeapWord* to, size_t count);
28 void _Copy_disjoint_words(HeapWord* from, HeapWord* to, size_t count);
30 void _Copy_conjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count);
31 void _Copy_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count);
33 void _Copy_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count);
34 void _Copy_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count);
36 void _Copy_conjoint_bytes(void* from, void* to, size_t count);
38 void _Copy_conjoint_bytes_atomic (void* from, void* to, size_t count);
39 void _Copy_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count);
40 void _Copy_conjoint_jints_atomic (jint* from, jint* to, size_t count);
41 void _Copy_conjoint_jlongs_atomic (jlong* from, jlong* to, size_t count);
42 void _Copy_conjoint_oops_atomic (oop* from, oop* to, size_t count);
44 void _Copy_arrayof_conjoint_bytes (HeapWord* from, HeapWord* to, size_t count);
45 void _Copy_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count);
46 void _Copy_arrayof_conjoint_jints (HeapWord* from, HeapWord* to, size_t count);
47 void _Copy_arrayof_conjoint_jlongs (HeapWord* from, HeapWord* to, size_t count);
48 void _Copy_arrayof_conjoint_oops (HeapWord* from, HeapWord* to, size_t count);
49 }
51 class Copy : AllStatic {
52 public:
53 // Block copy methods have four attributes. We don't define all possibilities.
54 // alignment: aligned according to minimum Java object alignment (MinObjAlignment)
55 // arrayof: arraycopy operation with both operands aligned on the same
56 // boundary as the first element of an array of the copy unit.
57 // This is currently a HeapWord boundary on all platforms, except
58 // for long and double arrays, which are aligned on an 8-byte
59 // boundary on all platforms.
60 // arraycopy operations are implicitly atomic on each array element.
61 // overlap: disjoint or conjoint.
62 // copy unit: bytes or words (i.e., HeapWords) or oops (i.e., pointers).
63 // atomicity: atomic or non-atomic on the copy unit.
64 //
65 // Names are constructed thusly:
66 //
67 // [ 'aligned_' | 'arrayof_' ]
68 // ('conjoint_' | 'disjoint_')
69 // ('words' | 'bytes' | 'jshorts' | 'jints' | 'jlongs' | 'oops')
70 // [ '_atomic' ]
71 //
72 // Except in the arrayof case, whatever the alignment is, we assume we can copy
73 // whole alignment units. E.g., if MinObjAlignment is 2x word alignment, an odd
74 // count may copy an extra word. In the arrayof case, we are allowed to copy
75 // only the number of copy units specified.
77 // HeapWords
79 // Word-aligned words, conjoint, not atomic on each word
80 static void conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
81 assert_params_ok(from, to, LogHeapWordSize);
82 pd_conjoint_words(from, to, count);
83 }
85 // Word-aligned words, disjoint, not atomic on each word
86 static void disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
87 assert_params_ok(from, to, LogHeapWordSize);
88 assert_disjoint(from, to, count);
89 pd_disjoint_words(from, to, count);
90 }
92 // Word-aligned words, disjoint, atomic on each word
93 static void disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
94 assert_params_ok(from, to, LogHeapWordSize);
95 assert_disjoint(from, to, count);
96 pd_disjoint_words_atomic(from, to, count);
97 }
99 // Object-aligned words, conjoint, not atomic on each word
100 static void aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
101 assert_params_aligned(from, to);
102 assert_non_zero(count);
103 pd_aligned_conjoint_words(from, to, count);
104 }
106 // Object-aligned words, disjoint, not atomic on each word
107 static void aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
108 assert_params_aligned(from, to);
109 assert_disjoint(from, to, count);
110 assert_non_zero(count);
111 pd_aligned_disjoint_words(from, to, count);
112 }
114 // bytes, jshorts, jints, jlongs, oops
116 // bytes, conjoint, not atomic on each byte (not that it matters)
117 static void conjoint_bytes(void* from, void* to, size_t count) {
118 assert_non_zero(count);
119 pd_conjoint_bytes(from, to, count);
120 }
122 // bytes, conjoint, atomic on each byte (not that it matters)
123 static void conjoint_bytes_atomic(void* from, void* to, size_t count) {
124 assert_non_zero(count);
125 pd_conjoint_bytes(from, to, count);
126 }
128 // jshorts, conjoint, atomic on each jshort
129 static void conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
130 assert_params_ok(from, to, LogBytesPerShort);
131 assert_non_zero(count);
132 pd_conjoint_jshorts_atomic(from, to, count);
133 }
135 // jints, conjoint, atomic on each jint
136 static void conjoint_jints_atomic(jint* from, jint* to, size_t count) {
137 assert_params_ok(from, to, LogBytesPerInt);
138 assert_non_zero(count);
139 pd_conjoint_jints_atomic(from, to, count);
140 }
142 // jlongs, conjoint, atomic on each jlong
143 static void conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
144 assert_params_ok(from, to, LogBytesPerLong);
145 assert_non_zero(count);
146 pd_conjoint_jlongs_atomic(from, to, count);
147 }
149 // oops, conjoint, atomic on each oop
150 static void conjoint_oops_atomic(oop* from, oop* to, size_t count) {
151 assert_params_ok(from, to, LogBytesPerHeapOop);
152 assert_non_zero(count);
153 pd_conjoint_oops_atomic(from, to, count);
154 }
156 // overloaded for UseCompressedOops
157 static void conjoint_oops_atomic(narrowOop* from, narrowOop* to, size_t count) {
158 assert(sizeof(narrowOop) == sizeof(jint), "this cast is wrong");
159 assert_params_ok(from, to, LogBytesPerInt);
160 assert_non_zero(count);
161 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
162 }
164 // Copy a span of memory. If the span is an integral number of aligned
165 // longs, words, or ints, copy those units atomically.
166 // The largest atomic transfer unit is 8 bytes, or the largest power
167 // of two which divides all of from, to, and size, whichever is smaller.
168 static void conjoint_memory_atomic(void* from, void* to, size_t size);
170 // bytes, conjoint array, atomic on each byte (not that it matters)
171 static void arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
172 assert_non_zero(count);
173 pd_arrayof_conjoint_bytes(from, to, count);
174 }
176 // jshorts, conjoint array, atomic on each jshort
177 static void arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
178 assert_params_ok(from, to, LogBytesPerShort);
179 assert_non_zero(count);
180 pd_arrayof_conjoint_jshorts(from, to, count);
181 }
183 // jints, conjoint array, atomic on each jint
184 static void arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
185 assert_params_ok(from, to, LogBytesPerInt);
186 assert_non_zero(count);
187 pd_arrayof_conjoint_jints(from, to, count);
188 }
190 // jlongs, conjoint array, atomic on each jlong
191 static void arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
192 assert_params_ok(from, to, LogBytesPerLong);
193 assert_non_zero(count);
194 pd_arrayof_conjoint_jlongs(from, to, count);
195 }
197 // oops, conjoint array, atomic on each oop
198 static void arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
199 assert_params_ok(from, to, LogBytesPerHeapOop);
200 assert_non_zero(count);
201 pd_arrayof_conjoint_oops(from, to, count);
202 }
204 // Known overlap methods
206 // Copy word-aligned words from higher to lower addresses, not atomic on each word
207 inline static void conjoint_words_to_lower(HeapWord* from, HeapWord* to, size_t byte_count) {
208 // byte_count is in bytes to check its alignment
209 assert_params_ok(from, to, LogHeapWordSize);
210 assert_byte_count_ok(byte_count, HeapWordSize);
212 size_t count = (size_t)round_to(byte_count, HeapWordSize) >> LogHeapWordSize;
213 assert(to <= from || from + count <= to, "do not overwrite source data");
215 while (count-- > 0) {
216 *to++ = *from++;
217 }
218 }
220 // Copy word-aligned words from lower to higher addresses, not atomic on each word
221 inline static void conjoint_words_to_higher(HeapWord* from, HeapWord* to, size_t byte_count) {
222 // byte_count is in bytes to check its alignment
223 assert_params_ok(from, to, LogHeapWordSize);
224 assert_byte_count_ok(byte_count, HeapWordSize);
226 size_t count = (size_t)round_to(byte_count, HeapWordSize) >> LogHeapWordSize;
227 assert(from <= to || to + count <= from, "do not overwrite source data");
229 from += count - 1;
230 to += count - 1;
231 while (count-- > 0) {
232 *to-- = *from--;
233 }
234 }
236 // Fill methods
238 // Fill word-aligned words, not atomic on each word
239 // set_words
240 static void fill_to_words(HeapWord* to, size_t count, juint value = 0) {
241 assert_params_ok(to, LogHeapWordSize);
242 pd_fill_to_words(to, count, value);
243 }
245 static void fill_to_aligned_words(HeapWord* to, size_t count, juint value = 0) {
246 assert_params_aligned(to);
247 pd_fill_to_aligned_words(to, count, value);
248 }
250 // Fill bytes
251 static void fill_to_bytes(void* to, size_t count, jubyte value = 0) {
252 pd_fill_to_bytes(to, count, value);
253 }
255 // Fill a span of memory. If the span is an integral number of aligned
256 // longs, words, or ints, store to those units atomically.
257 // The largest atomic transfer unit is 8 bytes, or the largest power
258 // of two which divides both to and size, whichever is smaller.
259 static void fill_to_memory_atomic(void* to, size_t size, jubyte value = 0);
261 // Zero-fill methods
263 // Zero word-aligned words, not atomic on each word
264 static void zero_to_words(HeapWord* to, size_t count) {
265 assert_params_ok(to, LogHeapWordSize);
266 pd_zero_to_words(to, count);
267 }
269 // Zero bytes
270 static void zero_to_bytes(void* to, size_t count) {
271 pd_zero_to_bytes(to, count);
272 }
274 private:
275 static bool params_disjoint(HeapWord* from, HeapWord* to, size_t count) {
276 if (from < to) {
277 return pointer_delta(to, from) >= count;
278 }
279 return pointer_delta(from, to) >= count;
280 }
282 // These methods raise a fatal if they detect a problem.
284 static void assert_disjoint(HeapWord* from, HeapWord* to, size_t count) {
285 #ifdef ASSERT
286 if (!params_disjoint(from, to, count))
287 basic_fatal("source and dest overlap");
288 #endif
289 }
291 static void assert_params_ok(void* from, void* to, intptr_t log_align) {
292 #ifdef ASSERT
293 if (mask_bits((uintptr_t)from, right_n_bits(log_align)) != 0)
294 basic_fatal("not aligned");
295 if (mask_bits((uintptr_t)to, right_n_bits(log_align)) != 0)
296 basic_fatal("not aligned");
297 #endif
298 }
300 static void assert_params_ok(HeapWord* to, intptr_t log_align) {
301 #ifdef ASSERT
302 if (mask_bits((uintptr_t)to, right_n_bits(log_align)) != 0)
303 basic_fatal("not word aligned");
304 #endif
305 }
306 static void assert_params_aligned(HeapWord* from, HeapWord* to) {
307 #ifdef ASSERT
308 if (mask_bits((uintptr_t)from, MinObjAlignmentInBytes-1) != 0)
309 basic_fatal("not object aligned");
310 if (mask_bits((uintptr_t)to, MinObjAlignmentInBytes-1) != 0)
311 basic_fatal("not object aligned");
312 #endif
313 }
315 static void assert_params_aligned(HeapWord* to) {
316 #ifdef ASSERT
317 if (mask_bits((uintptr_t)to, MinObjAlignmentInBytes-1) != 0)
318 basic_fatal("not object aligned");
319 #endif
320 }
322 static void assert_non_zero(size_t count) {
323 #ifdef ASSERT
324 if (count == 0) {
325 basic_fatal("count must be non-zero");
326 }
327 #endif
328 }
330 static void assert_byte_count_ok(size_t byte_count, size_t unit_size) {
331 #ifdef ASSERT
332 if ((size_t)round_to(byte_count, unit_size) != byte_count) {
333 basic_fatal("byte count must be aligned");
334 }
335 #endif
336 }
338 // Platform dependent implementations of the above methods.
339 #include "incls/_copy_pd.hpp.incl"
340 };