1 /*
2 * Copyright (c) 1997, 2023, 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/continuation.hpp"
33 #include "runtime/interfaceSupport.inline.hpp"
34 #include "runtime/timerTrace.hpp"
35 #include "runtime/sharedRuntime.hpp"
36 #include "runtime/stubRoutines.hpp"
37 #include "utilities/align.hpp"
38 #include "utilities/copy.hpp"
39 #ifdef COMPILER2
40 #include "opto/runtime.hpp"
41 #endif
42
43 UnsafeCopyMemory* UnsafeCopyMemory::_table = nullptr;
44 int UnsafeCopyMemory::_table_length = 0;
45 int UnsafeCopyMemory::_table_max_length = 0;
46 address UnsafeCopyMemory::_common_exit_stub_pc = nullptr;
47
48 // Implementation of StubRoutines - for a description
49 // of how to extend it, see the header file.
50
51 // Class Variables
52
53 BufferBlob* StubRoutines::_initial_stubs_code = nullptr;
54 BufferBlob* StubRoutines::_final_stubs_code = nullptr;
55 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr;
56 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr;
57
58 address StubRoutines::_call_stub_return_address = nullptr;
59 address StubRoutines::_call_stub_entry = nullptr;
60
61 address StubRoutines::_catch_exception_entry = nullptr;
62 address StubRoutines::_forward_exception_entry = nullptr;
63 address StubRoutines::_throw_AbstractMethodError_entry = nullptr;
64 address StubRoutines::_throw_IncompatibleClassChangeError_entry = nullptr;
65 address StubRoutines::_throw_NullPointerException_at_call_entry = nullptr;
66 address StubRoutines::_throw_StackOverflowError_entry = nullptr;
67 address StubRoutines::_throw_delayed_StackOverflowError_entry = nullptr;
68 jint StubRoutines::_verify_oop_count = 0;
69 address StubRoutines::_verify_oop_subroutine_entry = nullptr;
70 address StubRoutines::_atomic_xchg_entry = nullptr;
71 address StubRoutines::_atomic_cmpxchg_entry = nullptr;
72 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr;
73 address StubRoutines::_atomic_add_entry = nullptr;
74 address StubRoutines::_fence_entry = nullptr;
75
76 // Compiled code entry points default values
77 // The default functions don't have separate disjoint versions.
78 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
79 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
80 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
81 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
82 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
83 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
84 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
85 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
86 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
87 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
88 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
89 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
90
91 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
92 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
93 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
94 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
95 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
96 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
97 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
98 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
99 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
100 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
101 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
102 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
103
104 address StubRoutines::_data_cache_writeback = nullptr;
105 address StubRoutines::_data_cache_writeback_sync = nullptr;
106
107 address StubRoutines::_checkcast_arraycopy = nullptr;
108 address StubRoutines::_checkcast_arraycopy_uninit = nullptr;
109 address StubRoutines::_unsafe_arraycopy = nullptr;
110 address StubRoutines::_generic_arraycopy = nullptr;
111
112 address StubRoutines::_jbyte_fill;
113 address StubRoutines::_jshort_fill;
114 address StubRoutines::_jint_fill;
115 address StubRoutines::_arrayof_jbyte_fill;
116 address StubRoutines::_arrayof_jshort_fill;
117 address StubRoutines::_arrayof_jint_fill;
118
119 address StubRoutines::_aescrypt_encryptBlock = nullptr;
120 address StubRoutines::_aescrypt_decryptBlock = nullptr;
121 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr;
122 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr;
123 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr;
124 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr;
125 address StubRoutines::_counterMode_AESCrypt = nullptr;
126 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr;
127 address StubRoutines::_ghash_processBlocks = nullptr;
128 address StubRoutines::_chacha20Block = nullptr;
129 address StubRoutines::_base64_encodeBlock = nullptr;
130 address StubRoutines::_base64_decodeBlock = nullptr;
131 address StubRoutines::_poly1305_processBlocks = nullptr;
132
133 address StubRoutines::_md5_implCompress = nullptr;
134 address StubRoutines::_md5_implCompressMB = nullptr;
135 address StubRoutines::_sha1_implCompress = nullptr;
136 address StubRoutines::_sha1_implCompressMB = nullptr;
137 address StubRoutines::_sha256_implCompress = nullptr;
138 address StubRoutines::_sha256_implCompressMB = nullptr;
139 address StubRoutines::_sha512_implCompress = nullptr;
140 address StubRoutines::_sha512_implCompressMB = nullptr;
141 address StubRoutines::_sha3_implCompress = nullptr;
142 address StubRoutines::_sha3_implCompressMB = nullptr;
143
144 address StubRoutines::_updateBytesCRC32 = nullptr;
145 address StubRoutines::_crc_table_adr = nullptr;
146
147 address StubRoutines::_crc32c_table_addr = nullptr;
148 address StubRoutines::_updateBytesCRC32C = nullptr;
149 address StubRoutines::_updateBytesAdler32 = nullptr;
150
151 address StubRoutines::_multiplyToLen = nullptr;
152 address StubRoutines::_squareToLen = nullptr;
153 address StubRoutines::_mulAdd = nullptr;
154 address StubRoutines::_montgomeryMultiply = nullptr;
155 address StubRoutines::_montgomerySquare = nullptr;
156 address StubRoutines::_bigIntegerRightShiftWorker = nullptr;
157 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr;
158
159 address StubRoutines::_vectorizedMismatch = nullptr;
160
161 address StubRoutines::_dexp = nullptr;
162 address StubRoutines::_dlog = nullptr;
163 address StubRoutines::_dlog10 = nullptr;
164 address StubRoutines::_dpow = nullptr;
165 address StubRoutines::_dsin = nullptr;
166 address StubRoutines::_dcos = nullptr;
167 address StubRoutines::_dlibm_sin_cos_huge = nullptr;
168 address StubRoutines::_dlibm_reduce_pi04l = nullptr;
169 address StubRoutines::_dlibm_tan_cot_huge = nullptr;
170 address StubRoutines::_dtan = nullptr;
171
172 address StubRoutines::_load_inline_type_fields_in_regs = nullptr;
173 address StubRoutines::_store_inline_type_fields_to_buf = nullptr;
174
175 address StubRoutines::_f2hf = nullptr;
176 address StubRoutines::_hf2f = nullptr;
177
178 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
179 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_SVML_OP] = {{nullptr}, {nullptr}};
180
181 address StubRoutines::_cont_thaw = nullptr;
182 address StubRoutines::_cont_returnBarrier = nullptr;
183 address StubRoutines::_cont_returnBarrierExc = nullptr;
184
185 JFR_ONLY(RuntimeStub* StubRoutines::_jfr_write_checkpoint_stub = nullptr;)
186 JFR_ONLY(address StubRoutines::_jfr_write_checkpoint = nullptr;)
187
188 // Initialization
189 //
190 // Note: to break cycle with universe initialization, stubs are generated in two phases.
191 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
192 // The second phase includes all other stubs (which may depend on universe being initialized.)
193
194 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
195
196 void UnsafeCopyMemory::create_table(int max_size) {
197 UnsafeCopyMemory::_table = new UnsafeCopyMemory[max_size];
198 UnsafeCopyMemory::_table_max_length = max_size;
199 }
200
201 bool UnsafeCopyMemory::contains_pc(address pc) {
202 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
203 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
204 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
205 return true;
206 }
207 }
208 return false;
209 }
210
211 address UnsafeCopyMemory::page_error_continue_pc(address pc) {
212 for (int i = 0; i < UnsafeCopyMemory::_table_length; i++) {
213 UnsafeCopyMemory* entry = &UnsafeCopyMemory::_table[i];
214 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
215 return entry->error_exit_pc();
216 }
217 }
218 return nullptr;
219 }
220
221
222 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
223 int code_size, int max_aligned_stubs,
224 const char* timer_msg,
225 const char* buffer_name,
226 const char* assert_msg) {
227 ResourceMark rm;
228 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
229 // Add extra space for large CodeEntryAlignment
230 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
231 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
232 if (stubs_code == nullptr) {
233 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
234 }
235 CodeBuffer buffer(stubs_code);
236 StubGenerator_generate(&buffer, kind);
237 // When new stubs added we need to make sure there is some space left
238 // to catch situation when we should increase size again.
239 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
240
241 LogTarget(Info, stubs) lt;
242 if (lt.is_enabled()) {
243 LogStream ls(lt);
244 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
245 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
246 buffer.total_content_size(), buffer.insts_remaining());
247 }
248 return stubs_code;
249 }
250
251 void StubRoutines::initialize_initial_stubs() {
252 if (_initial_stubs_code == nullptr) {
253 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
254 _initial_stubs_code_size, 10,
255 "StubRoutines generation initial stubs",
256 "StubRoutines (initial stubs)",
257 "_initial_stubs_code_size");
258 }
259 }
260
261 void StubRoutines::initialize_continuation_stubs() {
262 if (_continuation_stubs_code == nullptr) {
263 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
264 _continuation_stubs_code_size, 10,
265 "StubRoutines generation continuation stubs",
266 "StubRoutines (continuation stubs)",
267 "_continuation_stubs_code_size");
268 }
269 }
270
271 void StubRoutines::initialize_compiler_stubs() {
272 if (_compiler_stubs_code == nullptr) {
273 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
274 _compiler_stubs_code_size, 100,
275 "StubRoutines generation compiler stubs",
276 "StubRoutines (compiler stubs)",
277 "_compiler_stubs_code_size");
278 }
279 }
280
281 #ifdef ASSERT
282 typedef void (*arraycopy_fn)(address src, address dst, int count);
283
284 // simple tests of generated arraycopy functions
285 static void test_arraycopy_func(address func, int alignment) {
286 int v = 0xcc;
287 int v2 = 0x11;
288 jlong lbuffer[8];
289 jlong lbuffer2[8];
290 address fbuffer = (address) lbuffer;
291 address fbuffer2 = (address) lbuffer2;
292 unsigned int i;
293 for (i = 0; i < sizeof(lbuffer); i++) {
294 fbuffer[i] = v; fbuffer2[i] = v2;
295 }
296 // C++ does not guarantee jlong[] array alignment to 8 bytes.
297 // Use middle of array to check that memory before it is not modified.
298 address buffer = align_up((address)&lbuffer[4], BytesPerLong);
299 address buffer2 = align_up((address)&lbuffer2[4], BytesPerLong);
300 // do an aligned copy
301 ((arraycopy_fn)func)(buffer, buffer2, 0);
302 for (i = 0; i < sizeof(lbuffer); i++) {
303 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
304 }
305 // adjust destination alignment
306 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
307 for (i = 0; i < sizeof(lbuffer); i++) {
308 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
309 }
310 // adjust source alignment
311 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
312 for (i = 0; i < sizeof(lbuffer); i++) {
313 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
314 }
315 }
316 #endif // ASSERT
317
318 void StubRoutines::initialize_final_stubs() {
319 if (_final_stubs_code == nullptr) {
320 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
321 _final_stubs_code_size, 10,
322 "StubRoutines generation final stubs",
323 "StubRoutines (final stubs)",
324 "_final_stubs_code_size");
325 }
326
327 #ifdef ASSERT
328
329 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXExec));
330
331 #define TEST_ARRAYCOPY(type) \
332 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \
333 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \
334 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \
335 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
336
337 // Make sure all the arraycopy stubs properly handle zero count
338 TEST_ARRAYCOPY(jbyte);
339 TEST_ARRAYCOPY(jshort);
340 TEST_ARRAYCOPY(jint);
341 TEST_ARRAYCOPY(jlong);
342
343 #undef TEST_ARRAYCOPY
344
345 #define TEST_FILL(type) \
346 if (_##type##_fill != nullptr) { \
347 union { \
348 double d; \
349 type body[96]; \
350 } s; \
351 \
352 int v = 32; \
353 for (int offset = -2; offset <= 2; offset++) { \
354 for (int i = 0; i < 96; i++) { \
355 s.body[i] = 1; \
356 } \
357 type* start = s.body + 8 + offset; \
358 for (int aligned = 0; aligned < 2; aligned++) { \
359 if (aligned) { \
360 if (((intptr_t)start) % HeapWordSize == 0) { \
361 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
362 } else { \
363 continue; \
364 } \
365 } else { \
366 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \
367 } \
368 for (int i = 0; i < 96; i++) { \
369 if (i < (8 + offset) || i >= (88 + offset)) { \
370 assert(s.body[i] == 1, "what?"); \
371 } else { \
372 assert(s.body[i] == 32, "what?"); \
373 } \
374 } \
375 } \
376 } \
377 } \
378
379 TEST_FILL(jbyte);
380 TEST_FILL(jshort);
381 TEST_FILL(jint);
382
383 #undef TEST_FILL
384
385 #define TEST_COPYRTN(type) \
386 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \
387 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
388
389 // Make sure all the copy runtime routines properly handle zero count
390 TEST_COPYRTN(jbyte);
391 TEST_COPYRTN(jshort);
392 TEST_COPYRTN(jint);
393 TEST_COPYRTN(jlong);
394
395 #undef TEST_COPYRTN
396
397 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
398 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
399 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
400 // Aligned to BytesPerLong
401 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
402 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
403
404 MACOS_AARCH64_ONLY(os::current_thread_enable_wx(WXWrite));
405
406 #endif
407 }
408
409
410 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
411 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
412 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
413
414 void compiler_stubs_init(bool in_compiler_thread) {
415 if (in_compiler_thread && DelayCompilerStubsGeneration) {
416 // Temporarily revert state of stubs generation because
417 // it is called after final_stubs_init() finished
418 // during compiler runtime initialization.
419 // It is fine because these stubs are only used by
420 // compiled code and compiler is not running yet.
421 StubCodeDesc::unfreeze();
422 StubRoutines::initialize_compiler_stubs();
423 StubCodeDesc::freeze();
424 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
425 StubRoutines::initialize_compiler_stubs();
426 }
427 }
428
429 //
430 // Default versions of arraycopy functions
431 //
432
433 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
434 #ifndef PRODUCT
435 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
436 #endif // !PRODUCT
437 Copy::conjoint_jbytes_atomic(src, dest, count);
438 JRT_END
439
440 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
441 #ifndef PRODUCT
442 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
443 #endif // !PRODUCT
444 Copy::conjoint_jshorts_atomic(src, dest, count);
445 JRT_END
446
447 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
448 #ifndef PRODUCT
449 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
450 #endif // !PRODUCT
451 Copy::conjoint_jints_atomic(src, dest, count);
452 JRT_END
453
454 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
455 #ifndef PRODUCT
456 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
457 #endif // !PRODUCT
458 Copy::conjoint_jlongs_atomic(src, dest, count);
459 JRT_END
460
461 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
462 #ifndef PRODUCT
463 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
464 #endif // !PRODUCT
465 assert(count != 0, "count should be non-zero");
466 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
467 JRT_END
468
469 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
470 #ifndef PRODUCT
471 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
472 #endif // !PRODUCT
473 assert(count != 0, "count should be non-zero");
474 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
475 JRT_END
476
477 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
478 #ifndef PRODUCT
479 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
480 #endif // !PRODUCT
481 Copy::arrayof_conjoint_jbytes(src, dest, count);
482 JRT_END
483
484 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
485 #ifndef PRODUCT
486 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
487 #endif // !PRODUCT
488 Copy::arrayof_conjoint_jshorts(src, dest, count);
489 JRT_END
490
491 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
492 #ifndef PRODUCT
493 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
494 #endif // !PRODUCT
495 Copy::arrayof_conjoint_jints(src, dest, count);
496 JRT_END
497
498 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
499 #ifndef PRODUCT
500 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
501 #endif // !PRODUCT
502 Copy::arrayof_conjoint_jlongs(src, dest, count);
503 JRT_END
504
505 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
506 #ifndef PRODUCT
507 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
508 #endif // !PRODUCT
509 assert(count != 0, "count should be non-zero");
510 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
511 JRT_END
512
513 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
514 #ifndef PRODUCT
515 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
516 #endif // !PRODUCT
517 assert(count != 0, "count should be non-zero");
518 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
519 JRT_END
520
521 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
522 #define RETURN_STUB(xxx_fill) { \
523 name = #xxx_fill; \
524 return StubRoutines::xxx_fill(); }
525
526 switch (t) {
527 case T_BYTE:
528 case T_BOOLEAN:
529 if (!aligned) RETURN_STUB(jbyte_fill);
530 RETURN_STUB(arrayof_jbyte_fill);
531 case T_CHAR:
532 case T_SHORT:
533 if (!aligned) RETURN_STUB(jshort_fill);
534 RETURN_STUB(arrayof_jshort_fill);
535 case T_INT:
536 case T_FLOAT:
537 if (!aligned) RETURN_STUB(jint_fill);
538 RETURN_STUB(arrayof_jint_fill);
539 case T_DOUBLE:
540 case T_LONG:
541 case T_ARRAY:
542 case T_PRIMITIVE_OBJECT:
543 case T_OBJECT:
544 case T_NARROWOOP:
545 case T_NARROWKLASS:
546 case T_ADDRESS:
547 case T_VOID:
548 // Currently unsupported
549 return nullptr;
550
551 default:
552 ShouldNotReachHere();
553 return nullptr;
554 }
555
556 #undef RETURN_STUB
557 }
558
559 // constants for computing the copy function
560 enum {
561 COPYFUNC_UNALIGNED = 0,
562 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
563 COPYFUNC_CONJOINT = 0,
564 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
565 };
566
567 // Note: The condition "disjoint" applies also for overlapping copies
568 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
569 address
570 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
571 int selector =
572 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
573 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
574
575 #define RETURN_STUB(xxx_arraycopy) { \
576 name = #xxx_arraycopy; \
577 return StubRoutines::xxx_arraycopy(); }
578
579 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
580 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
581 return StubRoutines::xxx_arraycopy(parm); }
582
583 switch (t) {
584 case T_BYTE:
585 case T_BOOLEAN:
586 switch (selector) {
587 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
588 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
589 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
590 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
591 }
592 case T_CHAR:
593 case T_SHORT:
594 switch (selector) {
595 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
596 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
597 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
598 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
599 }
600 case T_INT:
601 case T_FLOAT:
602 switch (selector) {
603 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
604 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
605 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
606 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
607 }
608 case T_DOUBLE:
609 case T_LONG:
610 switch (selector) {
611 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
612 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
613 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
614 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
615 }
616 case T_ARRAY:
617 case T_OBJECT:
618 switch (selector) {
619 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
620 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
621 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
622 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
623 }
624 default:
625 ShouldNotReachHere();
626 return nullptr;
627 }
628
629 #undef RETURN_STUB
630 #undef RETURN_STUB_PARM
631 }
632
633 UnsafeCopyMemoryMark::UnsafeCopyMemoryMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
634 _cgen = cgen;
635 _ucm_entry = nullptr;
636 if (add_entry) {
637 address err_exit_pc = nullptr;
638 if (!continue_at_scope_end) {
639 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeCopyMemory::common_exit_stub_pc();
640 }
641 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
642 _ucm_entry = UnsafeCopyMemory::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
643 }
644 }
645
646 UnsafeCopyMemoryMark::~UnsafeCopyMemoryMark() {
647 if (_ucm_entry != nullptr) {
648 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
649 if (_ucm_entry->error_exit_pc() == nullptr) {
650 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
651 }
652 }
653 }