1 /*
2 * Copyright (c) 1997, 2024, 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/klass.hpp"
31 #include "oops/oop.inline.hpp"
32 #include "prims/vectorSupport.hpp"
33 #include "runtime/continuation.hpp"
34 #include "runtime/interfaceSupport.inline.hpp"
35 #include "runtime/timerTrace.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38 #include "utilities/align.hpp"
39 #include "utilities/copy.hpp"
40 #ifdef COMPILER2
41 #include "opto/runtime.hpp"
42 #endif
43
44 UnsafeMemoryAccess* UnsafeMemoryAccess::_table = nullptr;
45 int UnsafeMemoryAccess::_table_length = 0;
46 int UnsafeMemoryAccess::_table_max_length = 0;
47 address UnsafeMemoryAccess::_common_exit_stub_pc = nullptr;
48
49 // Implementation of StubRoutines - for a description
50 // of how to extend it, see the header file.
51
52 // Class Variables
53
54 BufferBlob* StubRoutines::_initial_stubs_code = nullptr;
55 BufferBlob* StubRoutines::_final_stubs_code = nullptr;
56 BufferBlob* StubRoutines::_compiler_stubs_code = nullptr;
57 BufferBlob* StubRoutines::_continuation_stubs_code = nullptr;
58
59 address StubRoutines::_call_stub_return_address = nullptr;
60 address StubRoutines::_call_stub_entry = nullptr;
61
62 address StubRoutines::_catch_exception_entry = nullptr;
63 address StubRoutines::_forward_exception_entry = nullptr;
64 jint StubRoutines::_verify_oop_count = 0;
65 address StubRoutines::_verify_oop_subroutine_entry = nullptr;
66 address StubRoutines::_atomic_xchg_entry = nullptr;
67 address StubRoutines::_atomic_cmpxchg_entry = nullptr;
68 address StubRoutines::_atomic_cmpxchg_long_entry = nullptr;
69 address StubRoutines::_atomic_add_entry = nullptr;
70 address StubRoutines::_fence_entry = nullptr;
71
72 // Compiled code entry points default values
73 // The default functions don't have separate disjoint versions.
74 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
75 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
76 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
77 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
78 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
79 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
80 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
81 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
82 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
83 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
84 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
85 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
86
87 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
88 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
89 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
90 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
91 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
92 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
93 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
94 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
95 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
96 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
97 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
98 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
99
100 address StubRoutines::_data_cache_writeback = nullptr;
101 address StubRoutines::_data_cache_writeback_sync = nullptr;
102
103 address StubRoutines::_checkcast_arraycopy = nullptr;
104 address StubRoutines::_checkcast_arraycopy_uninit = nullptr;
105 address StubRoutines::_unsafe_arraycopy = nullptr;
106 address StubRoutines::_generic_arraycopy = nullptr;
107
108 address StubRoutines::_unsafe_setmemory = nullptr;
109
110 address StubRoutines::_jbyte_fill;
111 address StubRoutines::_jshort_fill;
112 address StubRoutines::_jint_fill;
113 address StubRoutines::_arrayof_jbyte_fill;
114 address StubRoutines::_arrayof_jshort_fill;
115 address StubRoutines::_arrayof_jint_fill;
116
117 address StubRoutines::_aescrypt_encryptBlock = nullptr;
118 address StubRoutines::_aescrypt_decryptBlock = nullptr;
119 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = nullptr;
120 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = nullptr;
121 address StubRoutines::_electronicCodeBook_encryptAESCrypt = nullptr;
122 address StubRoutines::_electronicCodeBook_decryptAESCrypt = nullptr;
123 address StubRoutines::_counterMode_AESCrypt = nullptr;
124 address StubRoutines::_galoisCounterMode_AESCrypt = nullptr;
125 address StubRoutines::_ghash_processBlocks = nullptr;
126 address StubRoutines::_chacha20Block = nullptr;
127 address StubRoutines::_base64_encodeBlock = nullptr;
128 address StubRoutines::_base64_decodeBlock = nullptr;
129 address StubRoutines::_poly1305_processBlocks = nullptr;
130 address StubRoutines::_intpoly_montgomeryMult_P256 = nullptr;
131 address StubRoutines::_intpoly_assign = 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::_string_indexof_array[4] = { nullptr };
148
149 address StubRoutines::_crc32c_table_addr = nullptr;
150 address StubRoutines::_updateBytesCRC32C = nullptr;
151 address StubRoutines::_updateBytesAdler32 = nullptr;
152
153 address StubRoutines::_multiplyToLen = nullptr;
154 address StubRoutines::_squareToLen = nullptr;
155 address StubRoutines::_mulAdd = nullptr;
156 address StubRoutines::_montgomeryMultiply = nullptr;
157 address StubRoutines::_montgomerySquare = nullptr;
158 address StubRoutines::_bigIntegerRightShiftWorker = nullptr;
159 address StubRoutines::_bigIntegerLeftShiftWorker = nullptr;
160
161 address StubRoutines::_vectorizedMismatch = nullptr;
162
163 address StubRoutines::_dexp = nullptr;
164 address StubRoutines::_dlog = nullptr;
165 address StubRoutines::_dlog10 = nullptr;
166 address StubRoutines::_fmod = nullptr;
167 address StubRoutines::_dpow = nullptr;
168 address StubRoutines::_dsin = nullptr;
169 address StubRoutines::_dcos = nullptr;
170 address StubRoutines::_dlibm_sin_cos_huge = nullptr;
171 address StubRoutines::_dlibm_reduce_pi04l = nullptr;
172 address StubRoutines::_dlibm_tan_cot_huge = nullptr;
173 address StubRoutines::_dtan = nullptr;
174 address StubRoutines::_dtanh = nullptr;
175
176 address StubRoutines::_f2hf = nullptr;
177 address StubRoutines::_hf2f = nullptr;
178
179 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH] = {{nullptr}, {nullptr}};
180 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH] = {{nullptr}, {nullptr}};
181
182 address StubRoutines::_method_entry_barrier = nullptr;
183 address StubRoutines::_array_sort = nullptr;
184 address StubRoutines::_array_partition = nullptr;
185
186 address StubRoutines::_cont_thaw = nullptr;
187 address StubRoutines::_cont_returnBarrier = nullptr;
188 address StubRoutines::_cont_returnBarrierExc = nullptr;
189
190 address StubRoutines::_upcall_stub_exception_handler = nullptr;
191 address StubRoutines::_upcall_stub_load_target = nullptr;
192
193 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr;
194 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr };
195
196
197 // Initialization
198 //
199 // Note: to break cycle with universe initialization, stubs are generated in two phases.
200 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
201 // The second phase includes all other stubs (which may depend on universe being initialized.)
202
203 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
204
205 void UnsafeMemoryAccess::create_table(int max_size) {
206 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size];
207 UnsafeMemoryAccess::_table_max_length = max_size;
208 }
209
210 bool UnsafeMemoryAccess::contains_pc(address pc) {
211 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
212 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
213 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
214 return true;
215 }
216 }
217 return false;
218 }
219
220 address UnsafeMemoryAccess::page_error_continue_pc(address pc) {
221 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
222 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
223 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
224 return entry->error_exit_pc();
225 }
226 }
227 return nullptr;
228 }
229
230 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
231 int code_size, int max_aligned_stubs,
232 const char* timer_msg,
233 const char* buffer_name,
234 const char* assert_msg) {
235 ResourceMark rm;
236 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
237 // Add extra space for large CodeEntryAlignment
238 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
239 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
240 if (stubs_code == nullptr) {
241 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
242 }
243 CodeBuffer buffer(stubs_code);
244 StubGenerator_generate(&buffer, kind);
245 // When new stubs added we need to make sure there is some space left
246 // to catch situation when we should increase size again.
247 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
248
249 LogTarget(Info, stubs) lt;
250 if (lt.is_enabled()) {
251 LogStream ls(lt);
252 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
253 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
254 buffer.total_content_size(), buffer.insts_remaining());
255 }
256 return stubs_code;
257 }
258
259 void StubRoutines::initialize_initial_stubs() {
260 if (_initial_stubs_code == nullptr) {
261 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
262 _initial_stubs_code_size, 10,
263 "StubRoutines generation initial stubs",
264 "StubRoutines (initial stubs)",
265 "_initial_stubs_code_size");
266 }
267 }
268
269 void StubRoutines::initialize_continuation_stubs() {
270 if (_continuation_stubs_code == nullptr) {
271 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
272 _continuation_stubs_code_size, 10,
273 "StubRoutines generation continuation stubs",
274 "StubRoutines (continuation stubs)",
275 "_continuation_stubs_code_size");
276 }
277 }
278
279 void StubRoutines::initialize_compiler_stubs() {
280 if (_compiler_stubs_code == nullptr) {
281 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
282 _compiler_stubs_code_size, 100,
283 "StubRoutines generation compiler stubs",
284 "StubRoutines (compiler stubs)",
285 "_compiler_stubs_code_size");
286 }
287 }
288
289 void StubRoutines::initialize_final_stubs() {
290 if (_final_stubs_code == nullptr) {
291 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
292 _final_stubs_code_size, 10,
293 "StubRoutines generation final stubs",
294 "StubRoutines (final stubs)",
295 "_final_stubs_code_size");
296 }
297 }
298
299 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
300 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
301 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
302
303 void compiler_stubs_init(bool in_compiler_thread) {
304 if (in_compiler_thread && DelayCompilerStubsGeneration) {
305 // Temporarily revert state of stubs generation because
306 // it is called after final_stubs_init() finished
307 // during compiler runtime initialization.
308 // It is fine because these stubs are only used by
309 // compiled code and compiler is not running yet.
310 StubCodeDesc::unfreeze();
311 StubRoutines::initialize_compiler_stubs();
312 StubCodeDesc::freeze();
313 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
314 StubRoutines::initialize_compiler_stubs();
315 }
316 }
317
318 //
319 // Default versions of arraycopy functions
320 //
321
322 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
323 #ifndef PRODUCT
324 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
325 #endif // !PRODUCT
326 Copy::conjoint_jbytes_atomic(src, dest, count);
327 JRT_END
328
329 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
330 #ifndef PRODUCT
331 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
332 #endif // !PRODUCT
333 Copy::conjoint_jshorts_atomic(src, dest, count);
334 JRT_END
335
336 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
337 #ifndef PRODUCT
338 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
339 #endif // !PRODUCT
340 Copy::conjoint_jints_atomic(src, dest, count);
341 JRT_END
342
343 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
344 #ifndef PRODUCT
345 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
346 #endif // !PRODUCT
347 Copy::conjoint_jlongs_atomic(src, dest, count);
348 JRT_END
349
350 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
351 #ifndef PRODUCT
352 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
353 #endif // !PRODUCT
354 assert(count != 0, "count should be non-zero");
355 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
356 JRT_END
357
358 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
359 #ifndef PRODUCT
360 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
361 #endif // !PRODUCT
362 assert(count != 0, "count should be non-zero");
363 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
364 JRT_END
365
366 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
367 #ifndef PRODUCT
368 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
369 #endif // !PRODUCT
370 Copy::arrayof_conjoint_jbytes(src, dest, count);
371 JRT_END
372
373 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
374 #ifndef PRODUCT
375 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
376 #endif // !PRODUCT
377 Copy::arrayof_conjoint_jshorts(src, dest, count);
378 JRT_END
379
380 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
381 #ifndef PRODUCT
382 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
383 #endif // !PRODUCT
384 Copy::arrayof_conjoint_jints(src, dest, count);
385 JRT_END
386
387 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
388 #ifndef PRODUCT
389 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
390 #endif // !PRODUCT
391 Copy::arrayof_conjoint_jlongs(src, dest, count);
392 JRT_END
393
394 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
395 #ifndef PRODUCT
396 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
397 #endif // !PRODUCT
398 assert(count != 0, "count should be non-zero");
399 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
400 JRT_END
401
402 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
403 #ifndef PRODUCT
404 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
405 #endif // !PRODUCT
406 assert(count != 0, "count should be non-zero");
407 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
408 JRT_END
409
410 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
411 #define RETURN_STUB(xxx_fill) { \
412 name = #xxx_fill; \
413 return StubRoutines::xxx_fill(); }
414
415 switch (t) {
416 case T_BYTE:
417 case T_BOOLEAN:
418 if (!aligned) RETURN_STUB(jbyte_fill);
419 RETURN_STUB(arrayof_jbyte_fill);
420 case T_CHAR:
421 case T_SHORT:
422 if (!aligned) RETURN_STUB(jshort_fill);
423 RETURN_STUB(arrayof_jshort_fill);
424 case T_INT:
425 case T_FLOAT:
426 if (!aligned) RETURN_STUB(jint_fill);
427 RETURN_STUB(arrayof_jint_fill);
428 case T_DOUBLE:
429 case T_LONG:
430 case T_ARRAY:
431 case T_OBJECT:
432 case T_NARROWOOP:
433 case T_NARROWKLASS:
434 case T_ADDRESS:
435 case T_VOID:
436 // Currently unsupported
437 return nullptr;
438
439 default:
440 ShouldNotReachHere();
441 return nullptr;
442 }
443
444 #undef RETURN_STUB
445 }
446
447 // constants for computing the copy function
448 enum {
449 COPYFUNC_UNALIGNED = 0,
450 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
451 COPYFUNC_CONJOINT = 0,
452 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
453 };
454
455 // Note: The condition "disjoint" applies also for overlapping copies
456 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
457 address
458 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
459 int selector =
460 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
461 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
462
463 #define RETURN_STUB(xxx_arraycopy) { \
464 name = #xxx_arraycopy; \
465 return StubRoutines::xxx_arraycopy(); }
466
467 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
468 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
469 return StubRoutines::xxx_arraycopy(parm); }
470
471 switch (t) {
472 case T_BYTE:
473 case T_BOOLEAN:
474 switch (selector) {
475 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
476 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
477 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
478 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
479 }
480 case T_CHAR:
481 case T_SHORT:
482 switch (selector) {
483 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
484 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
485 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
486 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
487 }
488 case T_INT:
489 case T_FLOAT:
490 switch (selector) {
491 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
492 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
493 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
494 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
495 }
496 case T_DOUBLE:
497 case T_LONG:
498 switch (selector) {
499 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
500 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
501 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
502 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
503 }
504 case T_ARRAY:
505 case T_OBJECT:
506 switch (selector) {
507 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
508 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
509 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
510 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
511 }
512 default:
513 ShouldNotReachHere();
514 return nullptr;
515 }
516
517 #undef RETURN_STUB
518 #undef RETURN_STUB_PARM
519 }
520
521 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
522 _cgen = cgen;
523 _ucm_entry = nullptr;
524 if (add_entry) {
525 address err_exit_pc = nullptr;
526 if (!continue_at_scope_end) {
527 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc();
528 }
529 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
530 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
531 }
532 }
533
534 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() {
535 if (_ucm_entry != nullptr) {
536 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
537 if (_ucm_entry->error_exit_pc() == nullptr) {
538 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
539 }
540 }
541 }