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::_load_inline_type_fields_in_regs = nullptr;
177 address StubRoutines::_store_inline_type_fields_to_buf = nullptr;
178
179 address StubRoutines::_f2hf = nullptr;
180 address StubRoutines::_hf2f = nullptr;
181
182 address StubRoutines::_vector_f_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH] = {{nullptr}, {nullptr}};
183 address StubRoutines::_vector_d_math[VectorSupport::NUM_VEC_SIZES][VectorSupport::NUM_VECTOR_OP_MATH] = {{nullptr}, {nullptr}};
184
185 address StubRoutines::_method_entry_barrier = nullptr;
186 address StubRoutines::_array_sort = nullptr;
187 address StubRoutines::_array_partition = nullptr;
188
189 address StubRoutines::_cont_thaw = nullptr;
190 address StubRoutines::_cont_returnBarrier = nullptr;
191 address StubRoutines::_cont_returnBarrierExc = nullptr;
192
193 address StubRoutines::_upcall_stub_exception_handler = nullptr;
194 address StubRoutines::_upcall_stub_load_target = nullptr;
195
196 address StubRoutines::_lookup_secondary_supers_table_slow_path_stub = nullptr;
197 address StubRoutines::_lookup_secondary_supers_table_stubs[Klass::SECONDARY_SUPERS_TABLE_SIZE] = { nullptr };
198
199
200 // Initialization
201 //
202 // Note: to break cycle with universe initialization, stubs are generated in two phases.
203 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
204 // The second phase includes all other stubs (which may depend on universe being initialized.)
205
206 extern void StubGenerator_generate(CodeBuffer* code, StubCodeGenerator::StubsKind kind); // only interface to generators
207
208 void UnsafeMemoryAccess::create_table(int max_size) {
209 UnsafeMemoryAccess::_table = new UnsafeMemoryAccess[max_size];
210 UnsafeMemoryAccess::_table_max_length = max_size;
211 }
212
213 bool UnsafeMemoryAccess::contains_pc(address pc) {
214 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
215 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
216 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
217 return true;
218 }
219 }
220 return false;
221 }
222
223 address UnsafeMemoryAccess::page_error_continue_pc(address pc) {
224 for (int i = 0; i < UnsafeMemoryAccess::_table_length; i++) {
225 UnsafeMemoryAccess* entry = &UnsafeMemoryAccess::_table[i];
226 if (pc >= entry->start_pc() && pc < entry->end_pc()) {
227 return entry->error_exit_pc();
228 }
229 }
230 return nullptr;
231 }
232
233
234 static BufferBlob* initialize_stubs(StubCodeGenerator::StubsKind kind,
235 int code_size, int max_aligned_stubs,
236 const char* timer_msg,
237 const char* buffer_name,
238 const char* assert_msg) {
239 ResourceMark rm;
240 TraceTime timer(timer_msg, TRACETIME_LOG(Info, startuptime));
241 // Add extra space for large CodeEntryAlignment
242 int size = code_size + CodeEntryAlignment * max_aligned_stubs;
243 BufferBlob* stubs_code = BufferBlob::create(buffer_name, size);
244 if (stubs_code == nullptr) {
245 vm_exit_out_of_memory(code_size, OOM_MALLOC_ERROR, "CodeCache: no room for %s", buffer_name);
246 }
247 CodeBuffer buffer(stubs_code);
248 StubGenerator_generate(&buffer, kind);
249 // When new stubs added we need to make sure there is some space left
250 // to catch situation when we should increase size again.
251 assert(code_size == 0 || buffer.insts_remaining() > 200, "increase %s", assert_msg);
252
253 LogTarget(Info, stubs) lt;
254 if (lt.is_enabled()) {
255 LogStream ls(lt);
256 ls.print_cr("%s\t [" INTPTR_FORMAT ", " INTPTR_FORMAT "] used: %d, free: %d",
257 buffer_name, p2i(stubs_code->content_begin()), p2i(stubs_code->content_end()),
258 buffer.total_content_size(), buffer.insts_remaining());
259 }
260 return stubs_code;
261 }
262
263 void StubRoutines::initialize_initial_stubs() {
264 if (_initial_stubs_code == nullptr) {
265 _initial_stubs_code = initialize_stubs(StubCodeGenerator::Initial_stubs,
266 _initial_stubs_code_size, 10,
267 "StubRoutines generation initial stubs",
268 "StubRoutines (initial stubs)",
269 "_initial_stubs_code_size");
270 }
271 }
272
273 void StubRoutines::initialize_continuation_stubs() {
274 if (_continuation_stubs_code == nullptr) {
275 _continuation_stubs_code = initialize_stubs(StubCodeGenerator::Continuation_stubs,
276 _continuation_stubs_code_size, 10,
277 "StubRoutines generation continuation stubs",
278 "StubRoutines (continuation stubs)",
279 "_continuation_stubs_code_size");
280 }
281 }
282
283 void StubRoutines::initialize_compiler_stubs() {
284 if (_compiler_stubs_code == nullptr) {
285 _compiler_stubs_code = initialize_stubs(StubCodeGenerator::Compiler_stubs,
286 _compiler_stubs_code_size, 100,
287 "StubRoutines generation compiler stubs",
288 "StubRoutines (compiler stubs)",
289 "_compiler_stubs_code_size");
290 }
291 }
292
293 void StubRoutines::initialize_final_stubs() {
294 if (_final_stubs_code == nullptr) {
295 _final_stubs_code = initialize_stubs(StubCodeGenerator::Final_stubs,
296 _final_stubs_code_size, 10,
297 "StubRoutines generation final stubs",
298 "StubRoutines (final stubs)",
299 "_final_stubs_code_size");
300 }
301 }
302
303 void initial_stubs_init() { StubRoutines::initialize_initial_stubs(); }
304 void continuation_stubs_init() { StubRoutines::initialize_continuation_stubs(); }
305 void final_stubs_init() { StubRoutines::initialize_final_stubs(); }
306
307 void compiler_stubs_init(bool in_compiler_thread) {
308 if (in_compiler_thread && DelayCompilerStubsGeneration) {
309 // Temporarily revert state of stubs generation because
310 // it is called after final_stubs_init() finished
311 // during compiler runtime initialization.
312 // It is fine because these stubs are only used by
313 // compiled code and compiler is not running yet.
314 StubCodeDesc::unfreeze();
315 StubRoutines::initialize_compiler_stubs();
316 StubCodeDesc::freeze();
317 } else if (!in_compiler_thread && !DelayCompilerStubsGeneration) {
318 StubRoutines::initialize_compiler_stubs();
319 }
320 }
321
322 //
323 // Default versions of arraycopy functions
324 //
325
326 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
327 #ifndef PRODUCT
328 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
329 #endif // !PRODUCT
330 Copy::conjoint_jbytes_atomic(src, dest, count);
331 JRT_END
332
333 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
334 #ifndef PRODUCT
335 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
336 #endif // !PRODUCT
337 Copy::conjoint_jshorts_atomic(src, dest, count);
338 JRT_END
339
340 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
341 #ifndef PRODUCT
342 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
343 #endif // !PRODUCT
344 Copy::conjoint_jints_atomic(src, dest, count);
345 JRT_END
346
347 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
348 #ifndef PRODUCT
349 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy
350 #endif // !PRODUCT
351 Copy::conjoint_jlongs_atomic(src, dest, count);
352 JRT_END
353
354 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
355 #ifndef PRODUCT
356 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
357 #endif // !PRODUCT
358 assert(count != 0, "count should be non-zero");
359 ArrayAccess<>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
360 JRT_END
361
362 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
363 #ifndef PRODUCT
364 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
365 #endif // !PRODUCT
366 assert(count != 0, "count should be non-zero");
367 ArrayAccess<IS_DEST_UNINITIALIZED>::oop_arraycopy_raw((HeapWord*)src, (HeapWord*)dest, count);
368 JRT_END
369
370 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
371 #ifndef PRODUCT
372 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy
373 #endif // !PRODUCT
374 Copy::arrayof_conjoint_jbytes(src, dest, count);
375 JRT_END
376
377 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
378 #ifndef PRODUCT
379 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy
380 #endif // !PRODUCT
381 Copy::arrayof_conjoint_jshorts(src, dest, count);
382 JRT_END
383
384 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
385 #ifndef PRODUCT
386 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy
387 #endif // !PRODUCT
388 Copy::arrayof_conjoint_jints(src, dest, count);
389 JRT_END
390
391 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
392 #ifndef PRODUCT
393 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy
394 #endif // !PRODUCT
395 Copy::arrayof_conjoint_jlongs(src, dest, count);
396 JRT_END
397
398 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
399 #ifndef PRODUCT
400 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
401 #endif // !PRODUCT
402 assert(count != 0, "count should be non-zero");
403 ArrayAccess<ARRAYCOPY_ARRAYOF>::oop_arraycopy_raw(src, dest, count);
404 JRT_END
405
406 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
407 #ifndef PRODUCT
408 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy
409 #endif // !PRODUCT
410 assert(count != 0, "count should be non-zero");
411 ArrayAccess<ARRAYCOPY_ARRAYOF | IS_DEST_UNINITIALIZED>::oop_arraycopy_raw(src, dest, count);
412 JRT_END
413
414 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
415 #define RETURN_STUB(xxx_fill) { \
416 name = #xxx_fill; \
417 return StubRoutines::xxx_fill(); }
418
419 switch (t) {
420 case T_BYTE:
421 case T_BOOLEAN:
422 if (!aligned) RETURN_STUB(jbyte_fill);
423 RETURN_STUB(arrayof_jbyte_fill);
424 case T_CHAR:
425 case T_SHORT:
426 if (!aligned) RETURN_STUB(jshort_fill);
427 RETURN_STUB(arrayof_jshort_fill);
428 case T_INT:
429 case T_FLOAT:
430 if (!aligned) RETURN_STUB(jint_fill);
431 RETURN_STUB(arrayof_jint_fill);
432 case T_DOUBLE:
433 case T_LONG:
434 case T_ARRAY:
435 case T_OBJECT:
436 case T_NARROWOOP:
437 case T_NARROWKLASS:
438 case T_ADDRESS:
439 case T_VOID:
440 // Currently unsupported
441 return nullptr;
442
443 default:
444 ShouldNotReachHere();
445 return nullptr;
446 }
447
448 #undef RETURN_STUB
449 }
450
451 // constants for computing the copy function
452 enum {
453 COPYFUNC_UNALIGNED = 0,
454 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize
455 COPYFUNC_CONJOINT = 0,
456 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend
457 };
458
459 // Note: The condition "disjoint" applies also for overlapping copies
460 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
461 address
462 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
463 int selector =
464 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) +
465 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
466
467 #define RETURN_STUB(xxx_arraycopy) { \
468 name = #xxx_arraycopy; \
469 return StubRoutines::xxx_arraycopy(); }
470
471 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \
472 name = parm ? #xxx_arraycopy "_uninit": #xxx_arraycopy; \
473 return StubRoutines::xxx_arraycopy(parm); }
474
475 switch (t) {
476 case T_BYTE:
477 case T_BOOLEAN:
478 switch (selector) {
479 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy);
480 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy);
481 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy);
482 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
483 }
484 case T_CHAR:
485 case T_SHORT:
486 switch (selector) {
487 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy);
488 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy);
489 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy);
490 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
491 }
492 case T_INT:
493 case T_FLOAT:
494 switch (selector) {
495 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy);
496 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy);
497 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy);
498 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy);
499 }
500 case T_DOUBLE:
501 case T_LONG:
502 switch (selector) {
503 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy);
504 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy);
505 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy);
506 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
507 }
508 case T_ARRAY:
509 case T_OBJECT:
510 switch (selector) {
511 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
512 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
513 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
514 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
515 }
516 default:
517 ShouldNotReachHere();
518 return nullptr;
519 }
520
521 #undef RETURN_STUB
522 #undef RETURN_STUB_PARM
523 }
524
525 UnsafeMemoryAccessMark::UnsafeMemoryAccessMark(StubCodeGenerator* cgen, bool add_entry, bool continue_at_scope_end, address error_exit_pc) {
526 _cgen = cgen;
527 _ucm_entry = nullptr;
528 if (add_entry) {
529 address err_exit_pc = nullptr;
530 if (!continue_at_scope_end) {
531 err_exit_pc = error_exit_pc != nullptr ? error_exit_pc : UnsafeMemoryAccess::common_exit_stub_pc();
532 }
533 assert(err_exit_pc != nullptr || continue_at_scope_end, "error exit not set");
534 _ucm_entry = UnsafeMemoryAccess::add_to_table(_cgen->assembler()->pc(), nullptr, err_exit_pc);
535 }
536 }
537
538 UnsafeMemoryAccessMark::~UnsafeMemoryAccessMark() {
539 if (_ucm_entry != nullptr) {
540 _ucm_entry->set_end_pc(_cgen->assembler()->pc());
541 if (_ucm_entry->error_exit_pc() == nullptr) {
542 _ucm_entry->set_error_exit_pc(_cgen->assembler()->pc());
543 }
544 }
545 }