1 /*
2 * Copyright (c) 1997, 2022, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/codeBuffer.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "memory/resourceArea.hpp"
29 #include "oops/access.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "prims/vectorSupport.hpp"
32 #include "runtime/interfaceSupport.inline.hpp"
33 #include "runtime/timerTrace.hpp"
34 #include "runtime/safefetch.inline.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "utilities/align.hpp"
37 #include "utilities/copy.hpp"
38 #ifdef COMPILER2
39 #include "opto/runtime.hpp"
40 #endif
41
42 UnsafeCopyMemory* UnsafeCopyMemory::_table = NULL;
43 int UnsafeCopyMemory::_table_length = 0;
44 int UnsafeCopyMemory::_table_max_length = 0;
45 address UnsafeCopyMemory::_common_exit_stub_pc = NULL;
46
47 // Implementation of StubRoutines - for a description
48 // of how to extend it, see the header file.
49
50 // Class Variables
51
52 BufferBlob* StubRoutines::_code1 = NULL;
53 BufferBlob* StubRoutines::_code2 = NULL;
54
55 address StubRoutines::_call_stub_return_address = NULL;
56 address StubRoutines::_call_stub_entry = NULL;
57
58 address StubRoutines::_catch_exception_entry = NULL;
59 address StubRoutines::_forward_exception_entry = NULL;
60 address StubRoutines::_throw_AbstractMethodError_entry = NULL;
61 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
62 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
63 address StubRoutines::_throw_StackOverflowError_entry = NULL;
64 address StubRoutines::_throw_delayed_StackOverflowError_entry = NULL;
65 jint StubRoutines::_verify_oop_count = 0;
66 address StubRoutines::_verify_oop_subroutine_entry = NULL;
67 address StubRoutines::_atomic_xchg_entry = NULL;
68 address StubRoutines::_atomic_xchg_long_entry = NULL;
69 address StubRoutines::_atomic_store_entry = NULL;
70 address StubRoutines::_atomic_cmpxchg_entry = NULL;
71 address StubRoutines::_atomic_cmpxchg_byte_entry = NULL;
72 address StubRoutines::_atomic_cmpxchg_long_entry = NULL;
73 address StubRoutines::_atomic_add_entry = NULL;
74 address StubRoutines::_atomic_add_long_entry = NULL;
75 address StubRoutines::_fence_entry = NULL;
76
77 // Compiled code entry points default values
78 // The default functions don't have separate disjoint versions.
79 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
80 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
81 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
82 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
83 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
84 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
85 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
86 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
87 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
88 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
89 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
90 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
91
92 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
93 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
94 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
95 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
96 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
97 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
98 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
99 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
100 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
101 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
102 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
103 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
104
105 address StubRoutines::_data_cache_writeback = NULL;
106 address StubRoutines::_data_cache_writeback_sync = NULL;
107
108 address StubRoutines::_checkcast_arraycopy = NULL;
109 address StubRoutines::_checkcast_arraycopy_uninit = NULL;
110 address StubRoutines::_unsafe_arraycopy = NULL;
111 address StubRoutines::_generic_arraycopy = NULL;
112
113 address StubRoutines::_jbyte_fill;
114 address StubRoutines::_jshort_fill;
115 address StubRoutines::_jint_fill;
116 address StubRoutines::_arrayof_jbyte_fill;
117 address StubRoutines::_arrayof_jshort_fill;
118 address StubRoutines::_arrayof_jint_fill;
119
120 address StubRoutines::_aescrypt_encryptBlock = NULL;
121 address StubRoutines::_aescrypt_decryptBlock = NULL;
122 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL;
123 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL;
124 address StubRoutines::_electronicCodeBook_encryptAESCrypt = NULL;
125 address StubRoutines::_electronicCodeBook_decryptAESCrypt = NULL;
126 address StubRoutines::_counterMode_AESCrypt = NULL;
127 address StubRoutines::_galoisCounterMode_AESCrypt = NULL;
128 address StubRoutines::_ghash_processBlocks = NULL;
129 address StubRoutines::_base64_encodeBlock = NULL;
130 address StubRoutines::_base64_decodeBlock = NULL;
131
132 address StubRoutines::_md5_implCompress = NULL;
133 address StubRoutines::_md5_implCompressMB = NULL;
134 address StubRoutines::_sha1_implCompress = NULL;
135 address StubRoutines::_sha1_implCompressMB = NULL;
136 address StubRoutines::_sha256_implCompress = NULL;
137 address StubRoutines::_sha256_implCompressMB = NULL;
138 address StubRoutines::_sha512_implCompress = NULL;
139 address StubRoutines::_sha512_implCompressMB = NULL;
140 address StubRoutines::_sha3_implCompress = NULL;
141 address StubRoutines::_sha3_implCompressMB = NULL;
142
143 address StubRoutines::_updateBytesCRC32 = NULL;
144 address StubRoutines::_crc_table_adr = NULL;
145
146 address StubRoutines::_crc32c_table_addr = NULL;
147 address StubRoutines::_updateBytesCRC32C = NULL;
148 address StubRoutines::_updateBytesAdler32 = NULL;
149
150 address StubRoutines::_multiplyToLen = NULL;
151 address StubRoutines::_squareToLen = NULL;
152 address StubRoutines::_mulAdd = NULL;
153 address StubRoutines::_montgomeryMultiply = NULL;
154 address StubRoutines::_montgomerySquare = NULL;
155 address StubRoutines::_bigIntegerRightShiftWorker = NULL;
156 address StubRoutines::_bigIntegerLeftShiftWorker = NULL;
157
158 address StubRoutines::_vectorizedMismatch = NULL;
159
160 address StubRoutines::_dexp = NULL;
161 address StubRoutines::_dlog = NULL;
162 address StubRoutines::_dlog10 = NULL;
163 address StubRoutines::_dpow = NULL;
164 address StubRoutines::_dsin = NULL;
165 address StubRoutines::_dcos = NULL;
166 address StubRoutines::_dlibm_sin_cos_huge = NULL;
167 address StubRoutines::_dlibm_reduce_pi04l = NULL;
168 address StubRoutines::_dlibm_tan_cot_huge = NULL;
169 address StubRoutines::_dtan = NULL;
170
171 address StubRoutines::_safefetch32_entry = NULL;
172 address StubRoutines::_safefetch32_fault_pc = NULL;
173 address StubRoutines::_safefetch32_continuation_pc = NULL;
174 address StubRoutines::_safefetchN_entry = NULL;
175 address StubRoutines::_safefetchN_fault_pc = NULL;
176 address StubRoutines::_safefetchN_continuation_pc = NULL;
177
178 address StubRoutines::_load_inline_type_fields_in_regs = NULL;
179 address StubRoutines::_store_inline_type_fields_to_buf = NULL;
180
181 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{NULL}, {NULL}};
182 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{NULL}, {NULL}};
183
184 // Initialization
185 //
186 // Note: to break cycle with universe initialization, stubs are generated in two phases.
187 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
188 // The second phase includes all other stubs (which may depend on universe being initialized.)
189
190 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
191
192 void UnsafeCopyMemory::create_table(int max_size) {
193 UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size];
194 UnsafeCopyMemory::_table_max_length = max_size;
195 }
196
197 bool UnsafeCopyMemory::contains_pc(address pc) {
198 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
199 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
200 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
201 return true;
202 }
203 }
204 return false;
205 }
206
207 address UnsafeCopyMemory::page_error_continue_pc(address pc) {
208 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
209 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
210 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
211 return entry->error_exit_pc();
212 }
213 }
214 return NULL;
215 }
216
217 void StubRoutines::initialize1() {
218 if (_code1 == NULL) {
219 ResourceMark rm;
220 TraceTime timer("StubRoutines generation 1", TRACETIME_LOG(Info, startuptime));
221 // Add extra space for large CodeEntryAlignment
222 int max_aligned_stubs = 10;
223 int size = code_size1 + CodeEntryAlignment * max_aligned_stubs;
224 _code1 = BufferBlob::create("StubRoutines (1)", size);
225 if (_code1 == NULL) {
226 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
227 }
228 CodeBuffer buffer(_code1);
229 StubGenerator_generate(&buffer, false);
230 // When new stubs added we need to make sure there is some space left
231 // to catch situation when we should increase size again.
232 assert(code_size1 == 0 || buffer.insts_remaining() > 200, "increase code_size1");
233 }
234 }
235
236
237 #ifdef ASSERT
238 typedef void (*arraycopy_fn)(address src, address dst, int count);
239
240 // simple tests of generated arraycopy functions
241 static void test_arraycopy_func(address func, int alignment) {
242 int v = 0xcc;
243 int v2 = 0x11;
244 jlong lbuffer[8];
245 jlong lbuffer2[8];
246 address fbuffer = (address) lbuffer;
247 address fbuffer2 = (address) lbuffer2;
248 unsigned int i;
249 for (i = 0; i < sizeof(lbuffer); i++) {
250 fbuffer[i] = v; fbuffer2[i] = v2;
251 }
252 // C++ does not guarantee jlong[] array alignment to 8 bytes.
253 // Use middle of array to check that memory before it is not modified.
254 address buffer = align_up((address)&lbuffer[4], BytesPerLong);
255 address buffer2 = align_up((address)&lbuffer2[4], BytesPerLong);
256 // do an aligned copy
257 ((arraycopy_fn)func)(buffer, buffer2, 0);
258 for (i = 0; i < sizeof(lbuffer); i++) {
259 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
260 }
261 // adjust destination alignment
262 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
263 for (i = 0; i < sizeof(lbuffer); i++) {
264 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
265 }
266 // adjust source alignment
267 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
268 for (i = 0; i < sizeof(lbuffer); i++) {
269 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
270 }
271 }
272 #endif // ASSERT
273
274 void StubRoutines::initialize2() {
275 if (_code2 == NULL) {
276 ResourceMark rm;
277 TraceTime timer("StubRoutines generation 2", TRACETIME_LOG(Info, startuptime));
278 // Add extra space for large CodeEntryAlignment
279 int max_aligned_stubs = 100;
280 int size = code_size2 + CodeEntryAlignment * max_aligned_stubs;
281 _code2 = BufferBlob::create("StubRoutines (2)", size);
282 if (_code2 == NULL) {
283 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
284 }
285 CodeBuffer buffer(_code2);
286 StubGenerator_generate(&buffer, true);
287 // When new stubs added we need to make sure there is some space left
288 // to catch situation when we should increase size again.
289 assert(code_size2 == 0 || buffer.insts_remaining() > 200, "increase code_size2");
290 }
291
292 #ifdef ASSERT
293
294 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
295
296 #define TEST_ARRAYCOPY(type) \
297 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \
298 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \
299 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \
300 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
301
302 // Make sure all the arraycopy stubs properly handle zero count
303 TEST_ARRAYCOPY(jbyte);
304 TEST_ARRAYCOPY(jshort);
305 TEST_ARRAYCOPY(jint);
306 TEST_ARRAYCOPY(jlong);
307
308 #undef TEST_ARRAYCOPY
309
310 #define TEST_FILL(type) \
311 if (_##type##_fill != NULL) { \
312 union { \
313 double d; \
314 type body[96]; \
315 } s; \
316 \
317 int v = 32; \
318 for (int offset = -2; offset <= 2; offset++) { \
319 for (int i = 0; i < 96; i++) { \
320 s.body[i] = 1; \
321 } \
322 type* start = s.body + 8 + offset; \
323 for (int aligned = 0; aligned < 2; aligned++) { \
324 if (aligned) { \
325 if (((intptr_t)start) % HeapWordSize == 0) { \
326 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
327 } else { \
328 continue; \
329 } \
330 } else { \
331 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \
332 } \
333 for (int i = 0; i < 96; i++) { \
334 if (i < (8 + offset) || i >= (88 + offset)) { \
335 assert(s.body[i] == 1, "what?"); \
336 } else { \
337 assert(s.body[i] == 32, "what?"); \
338 } \
339 } \
340 } \
341 } \
342 } \
343
344 TEST_FILL(jbyte);
345 TEST_FILL(jshort);
346 TEST_FILL(jint);
347
348 #undef TEST_FILL
349
350 #define TEST_COPYRTN(type) \
351 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \
352 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
353
354 // Make sure all the copy runtime routines properly handle zero count
355 TEST_COPYRTN(jbyte);
356 TEST_COPYRTN(jshort);
357 TEST_COPYRTN(jint);
358 TEST_COPYRTN(jlong);
359
360 #undef TEST_COPYRTN
361
362 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
363 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
364 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
365 // Aligned to BytesPerLong
366 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
367 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
368
369 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXWrite));
370
371 #endif
372 }
373
374
375 void stubRoutines_init1() { StubRoutines::initialize1(); }
376 void stubRoutines_init2() { StubRoutines::initialize2(); }
377
378 //
379 // Default versions of arraycopy functions
380 //
381
382 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
383 #ifndef PRODUCT
384 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
385 #endif // !PRODUCT
386 Copy::conjoint_jbytes_atomic(src, dest, count);
387 JRT_END
388
389 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
390 #ifndef PRODUCT
391 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
392 #endif // !PRODUCT
393 Copy::conjoint_jshorts_atomic(src, dest, count);
394 JRT_END
395
396 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
397 #ifndef PRODUCT
398 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
399 #endif // !PRODUCT
400 Copy::conjoint_jints_atomic(src, dest, count);
401 JRT_END
402
403 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
404 #ifndef PRODUCT
405 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
406 #endif // !PRODUCT
407 Copy::conjoint_jlongs_atomic(src, dest, count);
408 JRT_END
409
410 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
411 #ifndef PRODUCT
412 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
413 #endif // !PRODUCT
414 assert(count != 0, "count should be non-zero");
415 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
416 JRT_END
417
418 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
419 #ifndef PRODUCT
420 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
421 #endif // !PRODUCT
422 assert(count != 0, "count should be non-zero");
423 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
424 JRT_END
425
426 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
427 #ifndef PRODUCT
428 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
429 #endif // !PRODUCT
430 Copy::arrayof_conjoint_jbytes(src, dest, count);
431 JRT_END
432
433 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
434 #ifndef PRODUCT
435 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
436 #endif // !PRODUCT
437 Copy::arrayof_conjoint_jshorts(src, dest, count);
438 JRT_END
439
440 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
441 #ifndef PRODUCT
442 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
443 #endif // !PRODUCT
444 Copy::arrayof_conjoint_jints(src, dest, count);
445 JRT_END
446
447 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
448 #ifndef PRODUCT
449 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
450 #endif // !PRODUCT
451 Copy::arrayof_conjoint_jlongs(src, dest, count);
452 JRT_END
453
454 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
455 #ifndef PRODUCT
456 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
457 #endif // !PRODUCT
458 assert(count != 0, "count should be non-zero");
459 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
460 JRT_END
461
462 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
463 #ifndef PRODUCT
464 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
465 #endif // !PRODUCT
466 assert(count != 0, "count should be non-zero");
467 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
468 JRT_END
469
470 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
471 #define RETURN_STUB(xxx_fill) { \
472 name = #xxx_fill; \
473 return StubRoutines::xxx_fill(); }
474
475 switch (t) {
476 case T_BYTE:
477 case T_BOOLEAN:
478 if (!aligned) RETURN_STUB(jbyte_fill);
479 RETURN_STUB(arrayof_jbyte_fill);
480 case T_CHAR:
481 case T_SHORT:
482 if (!aligned) RETURN_STUB(jshort_fill);
483 RETURN_STUB(arrayof_jshort_fill);
484 case T_INT:
485 case T_FLOAT:
486 if (!aligned) RETURN_STUB(jint_fill);
487 RETURN_STUB(arrayof_jint_fill);
488 case T_DOUBLE:
489 case T_LONG:
490 case T_ARRAY:
491 case T_PRIMITIVE_OBJECT:
492 case T_OBJECT:
493 case T_NARROWOOP:
494 case T_NARROWKLASS:
495 case T_ADDRESS:
496 case T_VOID:
497 // Currently unsupported
498 return NULL;
499
500 default:
501 ShouldNotReachHere();
502 return NULL;
503 }
504
505 #undef RETURN_STUB
506 }
507
508 // constants for computing the copy function
509 enum {
510 COPYFUNC_UNALIGNED = 0,
511 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
512 COPYFUNC_CONJOINT = 0,
513 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
514 };
515
516 // Note: The condition "disjoint" applies also for overlapping copies
517 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
518 address
519 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
520 int selector =
521 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
522 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
523
524 #define RETURN_STUB(xxx_arraycopy) { \
525 name = #xxx_arraycopy; \
526 return StubRoutines::xxx_arraycopy(); }
527
528 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
529 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
530 return StubRoutines::xxx_arraycopy(parm); }
531
532 switch (t) {
533 case T_BYTE:
534 case T_BOOLEAN:
535 switch (selector) {
536 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
537 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
538 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
539 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
540 }
541 case T_CHAR:
542 case T_SHORT:
543 switch (selector) {
544 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
545 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
546 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
547 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
548 }
549 case T_INT:
550 case T_FLOAT:
551 switch (selector) {
552 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
553 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
554 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
555 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
556 }
557 case T_DOUBLE:
558 case T_LONG:
559 switch (selector) {
560 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
561 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
562 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
563 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
564 }
565 case T_ARRAY:
566 case T_OBJECT:
567 switch (selector) {
568 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
569 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
570 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
571 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
572 }
573 default:
574 ShouldNotReachHere();
575 return NULL;
576 }
577
578 #undef RETURN_STUB
579 #undef RETURN_STUB_PARM
580 }
581
582 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
583 _cgen = cgen;
584 _ucm_entry = NULL;
585 if (add_entry) {
586 address err_exit_pc = NULL;
587 if (!continue_at_scope_end) {
588 err_exit_pc = error_exit_pc != NULL ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc();
589 }
590 assert(err_exit_pc != NULL || continue_at_scope_end, "error exit not set");
591 _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), NULL, err_exit_pc);
592 }
593 }
594
595 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() {
596 if (_ucm_entry != NULL) {
597 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
598 if (_ucm_entry->error_exit_pc() == NULL) {
599 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
600 }
601 }
602 }