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 address StubRoutines::_cont_preempt_stub = nullptr;
190
191 address StubRoutines::_upcall_stub_exception_handler = nullptr;
192 address StubRoutines::_upcall_stub_load_target = nullptr;
193
194 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr;
195 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr };
196
197
198 // Initialization
199 //
200 // Note: to break cycle with universe initialization, stubs are generated in two phases.
201 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
202 // The second phase includes all other stubs (which may depend on universe being initialized.)
203
204 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
205
206 void UnsafeMemoryAccess::create_table(int max_size) {
207 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size];
208 UnsafeMemoryAccess::_table_max_length = max_size;
209 }
210
211 bool UnsafeMemoryAccess::contains_pc(address pc) {
212 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
213 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
214 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
215 return true;
216 }
217 }
218 return false;
219 }
220
221 address UnsafeMemoryAccess::page_error_continue_pc(address pc) {
222 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
223 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
224 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
225 return entry->error_exit_pc();
226 }
227 }
228 return nullptr;
229 }
230
231
232 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
233 int code_size, int max_aligned_stubs,
234 const char* timer_msg,
235 const char* buffer_name,
236 const char* assert_msg) {
237 ResourceMark rm;
238 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
239 // Add extra space for large CodeEntryAlignment
240 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
241 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
242 if (stubs_code == nullptr) {
243 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
244 }
245 CodeBuffer buffer(stubs_code);
246 StubGenerator_generate(&buffer, kind);
247 // When new stubs added we need to make sure there is some space left
248 // to catch situation when we should increase size again.
249 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
250
251 LogTarget(Info, stubs) lt;
252 if (lt.is_enabled()) {
253 LogStream ls(lt);
254 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
255 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
256 buffer.total_content_size(), buffer.insts_remaining());
257 }
258 return stubs_code;
259 }
260
261 void StubRoutines::initialize_initial_stubs() {
262 if (_initial_stubs_code == nullptr) {
263 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
264 _initial_stubs_code_size, 10,
265 "StubRoutines generation initial stubs",
266 "StubRoutines (initial stubs)",
267 "_initial_stubs_code_size");
268 }
269 }
270
271 void StubRoutines::initialize_continuation_stubs() {
272 if (_continuation_stubs_code == nullptr) {
273 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
274 _continuation_stubs_code_size, 10,
275 "StubRoutines generation continuation stubs",
276 "StubRoutines (continuation stubs)",
277 "_continuation_stubs_code_size");
278 }
279 }
280
281 void StubRoutines::initialize_compiler_stubs() {
282 if (_compiler_stubs_code == nullptr) {
283 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
284 _compiler_stubs_code_size, 100,
285 "StubRoutines generation compiler stubs",
286 "StubRoutines (compiler stubs)",
287 "_compiler_stubs_code_size");
288 }
289 }
290
291 void StubRoutines::initialize_final_stubs() {
292 if (_final_stubs_code == nullptr) {
293 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
294 _final_stubs_code_size, 10,
295 "StubRoutines generation final stubs",
296 "StubRoutines (final stubs)",
297 "_final_stubs_code_size");
298 }
299 }
300
301 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
302 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
303 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
304
305 void compiler_stubs_init(bool in_compiler_thread) {
306 if (in_compiler_thread && DelayCompilerStubsGeneration) {
307 // Temporarily revert state of stubs generation because
308 // it is called after final_stubs_init() finished
309 // during compiler runtime initialization.
310 // It is fine because these stubs are only used by
311 // compiled code and compiler is not running yet.
312 StubCodeDesc::unfreeze();
313 StubRoutines::initialize_compiler_stubs();
314 StubCodeDesc::freeze();
315 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
316 StubRoutines::initialize_compiler_stubs();
317 }
318 }
319
320 //
321 // Default versions of arraycopy functions
322 //
323
324 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
325 #ifndef PRODUCT
326 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
327 #endif // !PRODUCT
328 Copy::conjoint_jbytes_atomic(src, dest, count);
329 JRT_END
330
331 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
332 #ifndef PRODUCT
333 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
334 #endif // !PRODUCT
335 Copy::conjoint_jshorts_atomic(src, dest, count);
336 JRT_END
337
338 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
339 #ifndef PRODUCT
340 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
341 #endif // !PRODUCT
342 Copy::conjoint_jints_atomic(src, dest, count);
343 JRT_END
344
345 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
346 #ifndef PRODUCT
347 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
348 #endif // !PRODUCT
349 Copy::conjoint_jlongs_atomic(src, dest, count);
350 JRT_END
351
352 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
353 #ifndef PRODUCT
354 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
355 #endif // !PRODUCT
356 assert(count != 0, "count should be non-zero");
357 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
358 JRT_END
359
360 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
361 #ifndef PRODUCT
362 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
363 #endif // !PRODUCT
364 assert(count != 0, "count should be non-zero");
365 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
366 JRT_END
367
368 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
369 #ifndef PRODUCT
370 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
371 #endif // !PRODUCT
372 Copy::arrayof_conjoint_jbytes(src, dest, count);
373 JRT_END
374
375 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
376 #ifndef PRODUCT
377 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
378 #endif // !PRODUCT
379 Copy::arrayof_conjoint_jshorts(src, dest, count);
380 JRT_END
381
382 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
383 #ifndef PRODUCT
384 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
385 #endif // !PRODUCT
386 Copy::arrayof_conjoint_jints(src, dest, count);
387 JRT_END
388
389 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
390 #ifndef PRODUCT
391 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
392 #endif // !PRODUCT
393 Copy::arrayof_conjoint_jlongs(src, dest, count);
394 JRT_END
395
396 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
397 #ifndef PRODUCT
398 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
399 #endif // !PRODUCT
400 assert(count != 0, "count should be non-zero");
401 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
402 JRT_END
403
404 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
405 #ifndef PRODUCT
406 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
407 #endif // !PRODUCT
408 assert(count != 0, "count should be non-zero");
409 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
410 JRT_END
411
412 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
413 #define RETURN_STUB(xxx_fill) { \
414 name = #xxx_fill; \
415 return StubRoutines::xxx_fill(); }
416
417 switch (t) {
418 case T_BYTE:
419 case T_BOOLEAN:
420 if (!aligned) RETURN_STUB(jbyte_fill);
421 RETURN_STUB(arrayof_jbyte_fill);
422 case T_CHAR:
423 case T_SHORT:
424 if (!aligned) RETURN_STUB(jshort_fill);
425 RETURN_STUB(arrayof_jshort_fill);
426 case T_INT:
427 case T_FLOAT:
428 if (!aligned) RETURN_STUB(jint_fill);
429 RETURN_STUB(arrayof_jint_fill);
430 case T_DOUBLE:
431 case T_LONG:
432 case T_ARRAY:
433 case T_OBJECT:
434 case T_NARROWOOP:
435 case T_NARROWKLASS:
436 case T_ADDRESS:
437 case T_VOID:
438 // Currently unsupported
439 return nullptr;
440
441 default:
442 ShouldNotReachHere();
443 return nullptr;
444 }
445
446 #undef RETURN_STUB
447 }
448
449 // constants for computing the copy function
450 enum {
451 COPYFUNC_UNALIGNED = 0,
452 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
453 COPYFUNC_CONJOINT = 0,
454 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
455 };
456
457 // Note: The condition "disjoint" applies also for overlapping copies
458 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
459 address
460 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
461 int selector =
462 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
463 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
464
465 #define RETURN_STUB(xxx_arraycopy) { \
466 name = #xxx_arraycopy; \
467 return StubRoutines::xxx_arraycopy(); }
468
469 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
470 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
471 return StubRoutines::xxx_arraycopy(parm); }
472
473 switch (t) {
474 case T_BYTE:
475 case T_BOOLEAN:
476 switch (selector) {
477 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
478 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
479 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
480 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
481 }
482 case T_CHAR:
483 case T_SHORT:
484 switch (selector) {
485 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
486 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
487 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
488 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
489 }
490 case T_INT:
491 case T_FLOAT:
492 switch (selector) {
493 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
494 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
495 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
496 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
497 }
498 case T_DOUBLE:
499 case T_LONG:
500 switch (selector) {
501 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
502 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
503 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
504 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
505 }
506 case T_ARRAY:
507 case T_OBJECT:
508 switch (selector) {
509 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
510 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
511 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
512 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
513 }
514 default:
515 ShouldNotReachHere();
516 return nullptr;
517 }
518
519 #undef RETURN_STUB
520 #undef RETURN_STUB_PARM
521 }
522
523 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
524 _cgen = cgen;
525 _ucm_entry = nullptr;
526 if (add_entry) {
527 address err_exit_pc = nullptr;
528 if (!continue_at_scope_end) {
529 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc();
530 }
531 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
532 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
533 }
534 }
535
536 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() {
537 if (_ucm_entry != nullptr) {
538 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
539 if (_ucm_entry->error_exit_pc() == nullptr) {
540 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
541 }
542 }
543 }